CN106154715B - Splicing display device and tiled display control method - Google Patents

Abstract

The present invention is applicable to the field of optics, and provides a splicing display device and a splicing display control method. The splicing display device includes at least one projection display unit and a splicing control unit. The color wheel assembly that emits at least one subject light in the lower sequence; the compensation light and at least one subject light emit at the same time and have spectral overlap and can be adjusted independently of each other; the splicing control unit includes a color coordinate adjustment module. The compensation light source and excitation light source in each projection display unit are respectively modulated to adjust the color coordinates of the first primary color light of each projection display unit, so that the color coordinates of the first primary color light of each projection display unit are consistent. The present invention reduces the loss of the color gamut range while ensuring the consistency of the color coordinates of each primary color light among each projection display unit.

Description

Splicing display device and splicing display control method

technical field

The present invention relates to the field of optical technology, and more specifically, to a spliced display device and a spliced display control method.

Background technique

In recent years, with the maturity of laser phosphor technology, this technology overcomes the problem of low brightness of LED projection display and is widely used in the field of splicing display (such as splicing walls, etc.). Since a spliced display device generally includes multiple projection display units, in order to achieve a better spliced display effect, it is generally required that the color and brightness of each projection display unit in the spliced display device be consistent, otherwise the spliced display effect will be seriously affected. Generally, increasing or decreasing the brightness can be adjusted by increasing or decreasing the power of the light-emitting device of the projection display unit, but the color difference caused by the difference of the optical elements in the optical system, such as the difference between batches of optical filter coatings, will be cause color differences. In the existing DLP display technology of laser phosphor technology, if this difference is to be overcome, color coordinate adjustment (Color Coordinate Adjustment, CCA) technology is generally used for color adjustment. As shown in FIG. 1 , there are two projection display units, one of which has a color gamut range of ABC, and the other projection display unit has a color gamut range of A1B1C. If these two projection display units are to be spliced, it is necessary to adjust the color coordinates of the primary color lights of the two projection display units to be consistent, so as to ensure that the color gamut ranges of each projection display unit are consistent, thereby ensuring that each projection display unit The color consistency between the units, after color adjustment using CCA technology, the color coordinates of the two projection display units will be adjusted to the intersection of the two triangles shown in Figure 1, that is, A1B2C as shown in Figure 1, where B2 is the intersection point of BCA1B1, which will respectively lose the color gamut of the two projection display units.

Contents of the invention

In view of this, the present invention provides a spliced display device to solve the problem of loss of color gamut caused by the existing spliced display device when ensuring the consistency of the color coordinates of each projection display unit.

In a first aspect, a spliced display device is provided, including at least one projection display unit, and the projection display unit includes:

A light source module, including an excitation light source emitting excitation light and a compensation light source emitting compensation light;

A color wheel assembly, including at least one segmented area distributed along the moving direction of the color wheel assembly, and the color wheel assembly sequentially emits at least one irradiated laser light under the illumination of the exciting light source;

Wherein the compensation light has a spectral overlap with at least one of the at least one subject light, the compensation light is emitted within a period during which the subject light that has a spectrum overlap with the compensation light is emitted, and the compensation light and The subject light with spectral overlap with the compensation light can be adjusted independently of each other;

The splicing control unit includes a color coordinate adjustment module, and the color coordinate adjustment module is used to adjust the first primary color of each of the projection display units by respectively modulating the compensation light source and the excitation light source in each of the projection display units The color coordinates of the light, so that the color coordinates of the first primary color light of each of the projection display units are consistent, and the first primary color light is at least a part of the wavelength band of the compensation light and the received light that overlaps with the compensation light The mixed light of the affected light.

Preferably, the spliced display device further includes:

a detection unit, configured to detect the color coordinates and/or brightness of each primary color light in each of the projection display units;

A target value setting unit, configured to set the target color coordinates of the same primary color light among the projection display units when the color coordinates of the same primary color light between the projection display units are inconsistent, and/or When the luminances of the same primary color light are inconsistent among the projection display units, the target luminance of the same primary color light among the projection display units is set.

Preferably, the splicing control unit also includes:

The first brightness control module is used for proportionally adjusting the compensation light emitted by the color wheel assembly under the illumination of the compensation light source and the subject light emitted by the color wheel assembly under the illumination of the excitation light source, which has a spectral overlap with the compensation light to adjust the brightness of the first primary color light to the target brightness of the first primary color light.

Preferably, the wavelength conversion layer includes a first wavelength conversion layer that emits the first received light under the illumination of the excitation light source, and the compensation light source includes a first compensation light source that emits the first compensation light and emits and first compensation light. A second compensating light source with second compensating light having a different wavelength band, wherein:

The first compensation light has a spectrum overlap with the first subject light, the second compensation light has a spectrum overlap with the first subject light, and the first compensation light has a spectrum overlap with the first subject light The mixed light of the first wavelength band light forms the first light of the first primary color light of the projection display unit, and the mixed light of the second compensation light and the second wavelength band light in the first received light forms the projection display unit The second light in the first primary color light of the unit.

Preferably, the color coordinate adjustment module includes:

The first color coordinate adjustment module is configured to adjust the first primary color of the projection display unit by modulating the output power of the first compensation light source and the output power of the excitation light source in each of the projection display units. adjusting the color coordinates of the first light in the light to the target color coordinates of the first light in the first primary color light;

The second color coordinate adjustment module is used to adjust the output power of the first compensation light source in each of the projection display units to the output power of the excitation light source under the condition that the ratio remains unchanged. The output powers of the two compensating light sources are modulated to adjust the color coordinates of the second light of the first primary color light of each projection display unit to the target color coordinates of the second light of the first primary color light.

Preferably, the splicing control unit further includes:

The second brightness adjustment module is used to adjust the ratio of the output power of the first compensation light source in each of the projection display units to the output power of the excitation light source in an equal proportion to adjust the brightness in each of the projection display units. The output power of the first compensating light source and the output power of the exciting light source, so as to adjust the brightness of the first light in the first primary color light of each of the projection display units to the target brightness of the first light in the first primary color light;

The third brightness adjustment module is used to ensure that the output power of the excitation light source remains unchanged and the ratio between the output power of the second compensation light source in each of the projection display units and the output power of the excitation light source remains unchanged. , adjust the grayscale value corresponding to the second light in the first primary color light, so as to adjust the brightness of the second light in the first primary color light of each of the projection display units to the second light in the first primary color light the target brightness;

Wherein the gray value corresponding to the second light in the first primary color light is used to control the spatial light modulation component to modulate the second light in the first primary color light.

Preferably, the splicing control unit also includes:

A white balance adjustment module, configured to adjust the brightness of the second primary color light in the projection picture projected by each projection display unit, so that the white balance of the projection picture projected by each projection display unit reaches a preset target white balance , wherein the second primary color light refers to other primary color light of each projection display unit except the first primary color light.

In a second aspect, there is provided a splicing display control method based on the splicing display device, the method comprising:

By separately modulating the compensation light source and the excitation light source in each of the projection display units, the color coordinates of the first primary color light of each of the projection display units are adjusted, so that the color of the first primary color light of each of the projection display units The coordinates are consistent, and the first primary color light is a mixed light of the compensating light and the compensating light having at least a part of wavelength bands of the compensating light in the compensating light.

preferred,

The method also includes:

Detecting the color coordinates and/or brightness of each primary color light in each of the projection display units;

When the color coordinates of the same primary color light among the projection display units are inconsistent, set the target color coordinates of the same primary color light among the projection display units, and/or set the target color coordinates of the same primary color light among the projection display units When the luminances of the same primary color light are inconsistent, the target luminance of the same primary color light among the projection display units is set.

preferred,

When the projection display unit includes a first imaging component, and the first imaging component includes a digital micromirror device, it is characterized in that the method further includes:

Equally adjusting the brightness of the compensation light emitted by the color wheel assembly under the illumination of the compensation light source and the luminance of the subject light emitted by the color wheel assembly under the illumination of the excitation light source that overlaps with the compensation light in spectrum, so that the first The brightness of a primary color light is adjusted to the target brightness of the first primary color light.

Preferably, when the projection display unit includes the second imaging component or the third imaging component, it is characterized in that the wavelength conversion layer includes a first wavelength conversion layer that emits the first received light under the illumination of the excitation light source , the compensation light source includes a first compensation light source emitting a first compensation light and a second compensation light source emitting a second compensation light having a different wavelength band from the first compensation light, wherein:

The first compensation light has a spectrum overlap with the first subject light, the second compensation light has a spectrum overlap with the first subject light, and the first compensation light has a spectrum overlap with the first subject light The mixed light of the first wavelength band light forms the first light of the first primary color light of the projection display unit, and the mixed light of the second compensation light and the second wavelength band light in the first received light forms the projection display unit The second light in the first primary color light of the unit.

Preferably, adjusting the color coordinates of the first primary color light of each projection display unit by modulating the compensation light source and the excitation light source in each projection display unit specifically includes:

By modulating the output power of the first compensation light source and the output power of the excitation light source in each of the projection display units, the color coordinates of the first light in the first primary color light of the projection display unit adjusting to the target color coordinates of the first light in the first primary color light;

Under the condition that the ratio of the output power of the first compensation light source in each of the projection display units to the output power of the excitation light source remains unchanged, the output power of the second compensation light source in each of the projection display units is modulated, The color coordinates of the second light in the first primary color light of each of the projection display units are adjusted to the target color coordinates of the second light of the first primary color light.

Preferably, the method also includes:

Under the condition that the ratio between the output power of the first compensation light source in each of the projection display units and the output power of the excitation light source remains unchanged, adjust the output power of the first compensation light source in each of the projection display units in equal proportions and the output power of the exciting light source, so as to adjust the brightness of the first light in the first primary color light of each of the projection display units to the target brightness of the first light in the first primary color light;

When the output power of the excitation light source is guaranteed to be constant, and the ratio of the output power of the second compensation light source in each of the projection display units to the output power of the excitation light source is constant, adjust the first primary color light the gray value corresponding to the second light in the projection display unit, so as to adjust the brightness of the second light in the first primary color light of each of the projection display units to the target brightness of the second light in the first primary color light;

Wherein the gray value corresponding to the second light in the first primary color light is used to control the spatial light modulation component to modulate the second light in the first primary color light.

Preferably, the method also includes:

adjusting the brightness of the second primary color light in the projection picture projected by each projection display unit, so that the white balance of the projection picture projected by each projection display unit reaches a preset target white balance, wherein the second primary color The light refers to other primary color light of each projection display unit except the first primary color light.

Compared with the prior art, the technical solution provided by the present invention has the following advantages:

In the projection display units included in the splicing display device provided by the present invention, the color coordinates of each primary color light of each projection display unit can be adjusted by adjusting the light source in the light source module in each projection display unit, thereby ensuring that each projection display unit The consistency of the color coordinates of each primary color light reduces the loss of the color gamut range at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the color gamut of two projection display units included in a spliced display device provided in the prior art;

FIG. 2 is a schematic structural diagram of a spliced display device provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a projection display unit provided by an embodiment of the present invention;

Fig. 4 is a schematic diagram of segmented regions of a color wheel assembly provided by an embodiment of the present invention;

FIG. 5a and FIG. 5b are timing diagrams of light emitted by the color wheel assembly shown in FIG. 4 according to an embodiment of the present invention;

FIG. 6a and FIG. 6b are timing diagrams of light emitted from the color wheel assembly shown in FIG. 4 provided by another embodiment of the present invention;

Fig. 7 is a schematic diagram of segmented areas of a color wheel assembly provided by another embodiment of the present invention;

Fig. 8a, Fig. 8b and Fig. 8c are timing diagrams of light emitted from the color wheel assembly shown in Fig. 7 provided by an embodiment of the present invention;

Fig. 9 is a schematic diagram of segmented regions of a color wheel assembly provided by another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a projection display unit provided by another embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a spliced display device provided by another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a projection display unit provided by another embodiment of the present invention;

Fig. 13a is an optical timing diagram of the first digital micromirror device 144a and the second digital micromirror device 144b when a low-pass light splitting film is used in the projection display unit shown in Fig. 12 according to an embodiment of the present invention;

Fig. 13b is an optical timing diagram of the first digital micromirror device 144a and the second digital micromirror device 144b when a bandpass splitter film is used in the projection display unit shown in Fig. 12 provided by an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a projection display unit provided by another embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a projection display unit provided by another embodiment of the present invention;

Fig. 16 is a schematic structural diagram of a spliced display device provided by another embodiment of the present invention;

Fig. 17 is a schematic structural diagram of a spliced display device provided by another embodiment of the present invention;

FIG. 18 is a flow chart of an implementation of a splicing display control method based on a splicing display device according to an embodiment of the present invention.

Detailed ways

The present invention provides a splicing display device, comprising at least one projection display unit and a splicing control unit, and the projection display unit includes:

A light source module, including an excitation light source emitting excitation light and a compensation light source emitting compensation light;

A color wheel assembly, including at least one segmented area distributed along the moving direction of the color wheel assembly, and the color wheel assembly sequentially emits at least one stimulated light under the illumination of the exciting light source;

Wherein the compensation light has a spectral overlap with at least one of the at least one subject light, the compensation light is emitted within a period during which the subject light that has a spectrum overlap with the compensation light is emitted, and the compensation light and The subject light with spectral overlap with the compensation light can be adjusted independently of each other;

The splicing control unit includes a color coordinate adjustment module, and the color coordinate adjustment module is used to adjust the first primary color of each of the projection display units by respectively modulating the compensation light source and the excitation light source in each of the projection display units The color coordinates of the light, so that the color coordinates of the first primary color light of each of the projection display units are consistent, and the first primary color light is at least a part of the wavelength band of the compensation light and the received light that overlaps with the compensation light The mixed light of the affected light.

The present invention also provides a splicing display control method based on the splicing display device, the method comprising:

By separately modulating the compensation light source and the excitation light source in each of the projection display units, the color coordinates of the first primary color light of each of the projection display units are adjusted, so that the color of the first primary color light of each of the projection display units The coordinates are consistent, and the first primary color light is a mixed light of the compensating light and the compensating light having at least a part of wavelength bands of the compensating light in the compensating light.

The above is the core idea of the present invention. In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. Similar applications, therefore, the present invention is not limited by the specific embodiments disclosed below.

Secondly, the present invention is described in detail in combination with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

The following describes in detail through several embodiments.

Embodiment one

This embodiment provides a spliced display device, which includes at least one projection display unit 100 and a spliced control unit 200 . As shown in FIG. 2 , the spliced display device includes two projection display units 100 , namely a first projection display unit and a second projection display unit.

Referring to FIG. 3 , the projection display unit 100 includes a light source module 101 , and the light source module 101 includes an excitation light source 111 emitting excitation light and a compensation light source 112 emitting compensation light.

The projection display unit 100 also includes a color wheel assembly 102 located in the transmission light path of the excitation light emitted by the excitation light source 111 . The color wheel assembly 102 sequentially emits at least one stimulated light under the irradiation of the excitation light emitted by the excitation light source 111 . Wherein the compensation light emitted by the compensation light source 112 has a spectral overlap with at least one of the at least one received light emitted by the color wheel assembly 102, and the compensation light is emitted during the emission period of the received light that has a spectral overlap with the compensation light, In addition, the compensation light and the subject light whose spectrum overlaps with the compensation light can be adjusted independently of each other.

Specifically, the color wheel assembly 102 is also located in the transmission light path of the compensation light emitted by the compensation light source 112 , and emits the compensation light under the illumination of the compensation light source 112 . Or the color wheel assembly 102 is not located in the transmission path of the compensation light emitted by the compensation light source 112. The combined path of the received light in which the light spectrum overlaps is emitted.

Specifically, the color wheel assembly 102 includes at least one segmented area distributed along the moving direction of the color wheel assembly 102 . The movement direction of the color wheel assembly 102 includes but not limited to circular movement or horizontal or vertical movement. The color wheel assembly 102 includes at least one segmented area of the at least one segmented area provided with a wavelength conversion layer, and at least another segmented area of the at least one segmented area provided with a scattering layer including a scattering material. The wavelength conversion material absorbs the excitation light emitted by the excitation light source 111 to emit the received light, and the scattering material can scatter the incident light and emit it. The wavelength conversion material can be phosphor powder, quantum dot, etc. The scattering material may be scattering powder or the like.

Preferably, at least one of the at least one segmented area included in the color wheel assembly 102 is provided with a wavelength conversion layer that absorbs the excitation light emitted by the excitation light source 111 and emits the stimulated light that overlaps with the compensation light. For example, when the compensation light source 112 is a red laser light source, the color wheel assembly 102 includes at least one segmented area provided with a red wavelength conversion layer; when the compensation light source 112 is a blue-green laser light source, the color wheel assembly 102 includes a green At least one segmented region of the optical wavelength conversion layer, and so on, may also be in other forms, which will not be listed here.

In this embodiment, the specific implementation of the emission of the compensation light within the period of emission of the subject light that has spectral overlap with the compensation light can be as follows: the compensation light source 112 is configured to absorb the excitation light when the excitation light source 111 irradiates the color wheel assembly 102 The segmented area of the wavelength conversion layer that emits the received light that has spectral overlap with the compensation light is turned on, and the remaining segmented area of the color wheel assembly 102 is turned off when the excitation light source 111 irradiates the color wheel assembly 102 . Examples are as follows:

Assuming that the compensation light source 112 includes a red laser light source that emits red light, the segmented area of the color wheel assembly 102 that is provided with a wavelength conversion layer that absorbs the excitation light emitted by the excitation light source 111 and can emit red light is located in the transmission path of the excitation light source 111 , turn on the excitation light source 111 and the red laser light source at the same time, and turn off the red laser light source when the rest of the color wheel assembly 102 is located in the transmission path of the excitation light emitted by the excitation light source 111 . That is to say, the red laser light source emits red light in the period when the color wheel assembly emits red light with a spectral overlap with the supplementary red light under the irradiation of the excitation light, so that the red light of the compensation light overlaps with the red light of the compensation light. Exit within the time period when the laser is emitted.

In an embodiment of the present invention, the excitation light source 111 is turned on in all segmented areas of the color wheel assembly 102, so that when the segmented area of the color wheel assembly 102 provided with a scattering layer is located in the transmission light path of the excitation light source 111, The excitation light emitted by the excitation light source 111 enters the scattering layer, is scattered by the scattering layer and exits.

In another embodiment of the present invention, the light source module further includes a third light source (not shown in the figure) that emits a third light, and the third light emitted by the third light source is the same color as the excitation light emitted by the excitation light source 111. spectrum of light. The third light source is turned on in the segmented area where the scattering layer is provided in the color wheel assembly 102, and is turned off in the remaining segmented areas. The segmented area is closed.

The excitation light source 111 may be a blue light source, such as a blue laser light source or a blue LED light source, and the dominant wavelength of the blue light emitted by the excitation light source 111 may be 445nm. The compensation light source 112 includes a red laser light source emitting red light and/or a cyan laser light source emitting cyan light. The dominant wavelength of the cyan light emitted by the cyan laser light source can be any value between 510nm-530nm, including the endpoint value. Preferably, the dominant wavelength of the cyan light is 520nm. The dominant wavelength of the red light emitted by the red laser light source can be any value between 625nm-645nm, including the endpoint value, and the preferred dominant wavelength of the red light emitted by the red laser light source is 638nm. The third light source is a blue laser light source that emits blue light with a dominant wavelength different from that of the blue light emitted by the excitation light source 111 , for example, the dominant wavelength of the blue light emitted by the third light source may be 462 nm.

Please refer to Figures 4, 7, and 9, which are diagrams illustrating the distribution of each segmented area on the color wheel assembly 102 provided by the embodiment of the present invention, but the distribution of each segmented area on the color wheel assembly 102 is not as shown in Figures 4 and 7 , 9 is limited.

In Fig. 4, the color wheel assembly 102 is disc-shaped, and the color wheel assembly 102 includes segmented areas (called blue scattering areas) 1021 respectively provided with scattering layers along its circular motion direction, and green The segmented region (called green fluorescent region) 1022 of the light wavelength conversion layer and the segmented region (called red fluorescent region) 1023 provided with the red wavelength conversion layer.

If the light source module includes an excitation light source 111 and a compensation light source 112, wherein the compensation light source 112 includes a cyan laser light source and a red laser light source, then the excitation light source 111 and the red laser light source 111 are turned on in the segmented area of the color wheel assembly 102 provided with a red wavelength conversion layer. Laser light source, the segmented area provided with the green wavelength conversion layer turns on the excitation light source 111 and the blue-green laser light source, the segmented area provided with the scattering layer turns on the excitation light source 111, or the segmented area provided with the scattering layer turns on the excitation light source 111 and For a cyan laser light source, the time sequence of the light emitted by the color wheel assembly 102 is shown in Figure 5a or 5b, and the segmented area of the color wheel assembly 102 provided with the red wavelength conversion layer simultaneously emits the red light R1 emitted by the red laser light source And the red light R2 emitted by the red wavelength conversion layer under the irradiation of the excitation light source 111, the segmented area provided with the green wavelength conversion layer simultaneously emits the green light C emitted by the green laser light source and the green wavelength conversion layer in the excitation light source The green light G1 emitted under the irradiation, the segmented area provided with the scattering layer emits the blue light B1, or simultaneously emits the blue light B1 and the cyan light C emitted by the cyan laser light source.

If the light source module includes an excitation light source 111, a compensation light source 112 and a third light source, the excitation light source 111 and the red laser light source are turned on in the segmented area of the color wheel assembly 102 where the red light wavelength conversion layer is provided, and the green light wavelength Turn on the excitation light source 111 and the cyan laser light source in the segmented area of the conversion layer, turn on the third light source in the segmented area provided with the scattering layer, or turn on the third light source and the cyan laser light source in the segmented area provided with the scattering layer, then the The time sequence of the light emitted by the color wheel assembly 102 is shown in Figure 6a or 6b. The segmented area of the color wheel assembly 102 provided with the red wavelength conversion layer emits the red light R1 emitted by the red laser light source and the red wavelength conversion layer at the same time. The red light R2 emitted under the irradiation of the excitation light source, the segmented area provided with the green wavelength conversion layer simultaneously emits the green light C emitted by the green laser light source and the green light G1 emitted by the green wavelength conversion layer under the irradiation of the excitation light source , the segmented area provided with the scattering layer emits the third light, or the segmented area provided with the scattering layer emits the third light and the cyan laser light C at the same time, the third light is the blue light B2.

In FIG. 7, the color wheel assembly 102 is disc-shaped, and the color wheel assembly 102 includes segmented regions (also referred to as yellow fluorescent regions) 1024 respectively provided with yellow light wavelength conversion layers along its circular motion direction, And a segmented area (also referred to as a blue light scattering area) 1025 provided with a scattering layer.

If the light source module 101 includes an excitation light source 111 and a compensation light source 112, and the compensation light source 112 includes a cyan laser light source and a red laser light source, the excitation light source 111 is turned on in the segmented area of the color wheel assembly 102 provided with a yellow wavelength conversion layer, And the red laser light source and/or the cyan laser light source, turn on the excitation light source 111 in the segmented area provided with the scattering layer, or the excitation light source 111 and the cyan laser light source, then the time sequence of the light emitted by the color wheel assembly 102 is shown in Figures 8a and 8b Or as shown in 8c, the segmented area of the color wheel assembly 102 provided with the yellow light wavelength conversion layer simultaneously emits yellow light Y and red light R1, or simultaneously emits yellow light Y and cyan light C, or simultaneously emits yellow light Y, For the red light R1 and the cyan light C, the segmented area provided with the scattering layer emits the blue light B1, or simultaneously emits the blue light B1 and the cyan light C.

If the light source module includes an excitation light source 111, a compensation light source 112 and a third light source, the excitation light source 111, and the cyan laser light source and/or the red laser light source are turned on in the segmented area of the color wheel assembly 102 provided with a yellow wavelength conversion layer ; In the segmented area of the color wheel assembly 102 that is provided with the scattering layer, turn on the third light source, or turn on the third light source and the blue-green laser light source, so that the segmented area of the color wheel assembly 102 that is provided with the yellow wavelength conversion layer is simultaneously Yellow light Y and red light R1 are emitted, or yellow light Y and cyan light C are emitted simultaneously, or yellow light Y, red light R1 and cyan light C are emitted simultaneously, blue light B2 is emitted from the segmented area provided with a scattering layer, or they are emitted simultaneously Blue light B2 and cyan light C.

In FIG. 9, the color wheel assembly 102 is disc-shaped, and the color wheel assembly 102 is a pure color segment color wheel, that is, a yellow wavelength conversion layer including a yellow wavelength conversion material is provided on the circumferential direction of the color wheel assembly 102. . Wherein, the yellow light wavelength conversion material may be yellow fluorescent powder or the like.

If the light source module includes an excitation light source 111 and a compensation light source 112 , the excitation light source 111 and the compensation light source 112 are turned on during the entire movement period of the color wheel assembly 102 . Then the color wheel assembly 102 simultaneously emits yellow light Y, blue light B1 and red light R1 , or yellow light Y, blue light B1 and cyan light C, or yellow light Y, blue light B1 , red light R1 and cyan light C.

If the light source module includes an excitation light source 111, a compensation light source 112 and a third light source, the excitation light source 111, the third light source, and the compensation light source 112 are turned on during the entire movement cycle of the color wheel assembly 102, so that the color wheel assembly 102 emits light at the same time Yellow light Y, third light (which is blue light) B2 and red light R1, or yellow light Y, third light (which is blue light) B2 and cyan light C, or yellow light Y, third light (which is blue light) B2, red light R1 and green light C.

The splicing control unit 200 includes a color coordinate adjustment module 210 . The color coordinate adjustment module 210 adjusts the color coordinates of the first primary color light of each projection display unit 100 by modulating the compensation light source and excitation light source in each projection display unit 100 respectively, so that the first primary color light of each projection display unit 100 The color coordinates of light are the same.

Wherein the first primary color light refers to one of the primary color lights in the projection picture formed by projection and display unit 100 on the screen, and the first primary color light is the compensation light emitted by the color wheel assembly 102 under the illumination of the compensation light source 112 The primary color light is formed by mixing with at least part of the wavelength band of the stimulated light emitted by the color wheel assembly 102 under the illumination of the excitation light source 111 and having a spectral overlap with the compensation light.

The primary color light in the projection picture formed by projection display unit 100 on the screen generally includes red primary color light, green primary color light and blue primary color light. The primary color light in the projection picture formed by the projection display unit 100 on the screen may be excitation light, for example, the blue primary color light in the projection picture formed by the projection display unit 100 on the screen may be the color wheel assembly 102 shown in FIG. 4 The emitted blue light B1, or the blue light B1 emitted by the color wheel assembly 102 shown in FIG. 7 . The primary color light in the projected image projected on the screen by the projection display unit 100 may also be the received light. The primary color light in the projection picture formed by projection display unit 100 on the screen may also be a mixed light of excitation light and compensation light, such as the mixed light of blue light B1 and cyan light C emitted by the color wheel assembly 102 shown in FIG. 4 , Or it is the mixed light of the third light and the compensation light, such as the mixed light of the blue light B2 and the cyan light C emitted by the color wheel assembly 102 as shown in FIG. 4 . The primary color light in the projected picture formed by the projection display unit 100 on the screen may also be the compensation light emitted by the color wheel assembly 102 under the illumination of the compensation light source 112 and the compensation light emitted by the color wheel assembly 102 under the illumination of the excitation light source 111. The compensation light is a mixed light of at least part of the wavelength band of the subject light with overlapping spectra, and the primary color light is the first primary color light. For example, the red primary color light in the projection picture projected on the screen by the projection display unit 100 can be shown in FIG. 4 The mixed light of the red light R1 and the red light R2 emitted by the color wheel assembly 102 shown, or the red light R3 whose waveband is in the red part of the red light R1 and the yellow light Y emitted by the color wheel assembly shown in FIG. 7 The green primary color light projected on the screen by the projection display unit 100 may be the mixed light of the cyan light C and the green light G1 emitted by the color wheel assembly shown in FIG. 4 , or the mixed light shown in FIG. The cyan light C emitted by the color wheel assembly and the mixed light of the light G2 of the yellow light Y whose wavelength band is in the green part, etc., so that the red primary color light and the green primary color light in the projection display unit 100 are both the first primary color light. It can be understood that the first primary color light may include one of the red, green, and blue primary color lights in the projection display unit, and may also include two or three of the red, green, and blue primary color lights.

In this embodiment, since the output power of the light source is directly proportional to the driving current of the light source, the color coordinate adjustment module 210 can adjust the output of the compensation light source and the excitation light source by respectively adjusting the driving current of the compensation light source and the excitation light source. Therefore, by adjusting the output power of the compensation light source and the excitation light source respectively through the color coordinate adjustment module 210, the compensation light in the first primary color light in each projection display unit and the receiving light that has spectral overlap with the compensation light can be adjusted. The ratio between the received light in at least a part of the wavelength bands, and then achieve the purpose of adjusting the color coordinates of the first primary color light.

Preferably, when the color coordinate adjustment module 210 satisfies the following formula (1), the output power of the compensation light source and the output power of the excitation light source in each projection display unit 100 are respectively modulated, so that each projection display unit 100 The color coordinates of the first primary color light in reach the target color coordinates of the first primary color light:

Wherein M represents the first primary color light, for example, M represents red primary color light, green primary color light or blue primary color light. M1 represents the compensation light included in the first primary color light, and the compensation light is emitted by the color wheel assembly 102 under the illumination of the compensation light source 112 . M2 represents at least part of the wavelength range of the subject light included in the first primary color light and the subject light having a spectral overlap with the compensation light. At least part of the wavelength band of the processed light that overlaps with the compensation light is emitted by the color wheel assembly under the illumination of the exciting light source.

LM is the target luminance of the first primary color light, _LM1 is the luminance of the compensation light, _LM2 is the luminance of at least a part of the wavelength band of the received light that overlaps with the compensation light, and _{(X M ,} Y _M ) is The target color coordinates of the first primary color light, (X _M1 , Y _M1 ) is the color coordinates of the compensation light, (X _M2 , Y _M2 ) is the color of at least a part of the wavelength band of the received light that overlaps with the compensated light coordinate.

Examples are as follows:

Assuming that the first primary color light is red primary color light, the color coordinate adjustment module 210 modulates the red laser light source and the excitation light source in each projection display unit 100 respectively, so as to adjust the red light emitted by the red laser light source and the excitation of the color wheel assembly. The ratio of the emitted red light under the illumination of the light source is used to adjust the color coordinates of the red primary color light of each projection display unit 100 to the target color coordinates of the red primary color light. Wherein the red light R1 emitted by the color wheel assembly under the irradiation of the red laser light source and the light of at least a part of the wavelength range of the light emitted by the color wheel assembly under the irradiation of the excitation light source overlaps with the compensation light in the spectrum (such as the color wheel assembly The red light R2) emitted under the illumination of the excitation light source meets the requirements of the following formula (2):

Wherein (X _R , Y _R ) is the target color coordinate of the red primary color light. (X _R1 , Y _R1 ) are the color coordinates of the red light emitted by the color wheel assembly under the irradiation of the red laser light source. (X _R2 , Y _R2 ) is the color coordinate of the red light emitted by the color wheel assembly under the illumination of the exciting light source. If the color wheel assembly is provided with a red light wavelength conversion layer or a yellow light wavelength conversion layer, the color The wheel assembly emits red light R2 or yellow light Y under the illumination of the excitation light source, and the red light can be separated from the yellow light Y. _LR is the target brightness of the first primary color light, _{LR1 is the brightness of the red light emitted by the color wheel assembly under the irradiation of the red laser light source, and L R2 is} the brightness of the red light emitted by the color wheel assembly under the irradiation of the excitation light source brightness.

Assuming that the first primary color light is green primary color light, the color coordinate adjustment module 210 modulates the cyan laser light source and the excitation light source in each projection display unit 100 respectively, so as to adjust the cyan light emitted by the cyan laser light source and the excitation of the color wheel assembly. The ratio of the emitted green light under the illumination of the light source is used to adjust the color coordinates of the green primary color light of each projection display unit 100 to the target color coordinates. Wherein the cyan light C emitted by the color wheel assembly under the illumination of the cyan laser light source and the green light G1 emitted by the color wheel assembly under the illumination of the excitation light source and which overlaps with the cyan light spectrum meet the requirements of the following formula (3):

Wherein (X _G , Y _G ) is the target color coordinate of the green primary color light. (X _C , Y _C ) are the color coordinates of the cyan light emitted by the color wheel assembly under the irradiation of the cyan laser light source. (X _G1 , Y _G1 ) is the color coordinates of the green light emitted by the color wheel assembly under the illumination of the excitation light source and has a spectral overlap with the cyan light. For example, a green light wavelength conversion layer or a yellow light wavelength conversion layer is arranged on the color wheel assembly. When layering, the color wheel assembly emits green light G1 or yellow light Y under the illumination of the excitation light source, and the green light can be separated from the yellow light Y. L _G is the target brightness of the green primary color light, _LC is the brightness of the cyan light emitted by the color wheel assembly under the illumination of the cyan laser light source, and L _G1 is the presence of the cyan light emitted by the color wheel assembly under the illumination of the excitation light source Brightness of spectrally overlapping green light.

In the embodiment of the present invention, the color coordinate adjustment module 210 adjusts the output power of the compensation light source and the excitation light source in each projection display unit, so that the compensation light and the first primary color light in each projection display unit can be adjusted. The compensation light has the ratio of the receiving light in at least a part of the wavelength bands of the receiving light with overlapping spectra, so that the color coordinates of the first primary color light in each projection display unit can be changed, so that the first primary color light in each projection display unit The color coordinates of a primary color light all reach the target color coordinates of the first primary color light, so that the color coordinates of the first primary color light of each projection display unit are consistent.

In another embodiment of the present invention, the spliced display device further includes a detection unit 300 and a target value setting unit 400 . in:

The detection unit 300 detects the color coordinates and/or brightness of each primary color light in each projection display unit 100 .

Specifically, when the detection unit 300 detects the color coordinates of the red, green, and blue primary color lights in each projection display unit 100, it generally detects the red, green, and blue colors in the projection picture formed by each projection display unit 100 projected on the screen. The color coordinates of the blue primary color light. The detection unit 300 may be any device provided in the prior art that can detect the color coordinates and/or brightness of each primary color light in the projection screen.

The target value setting unit 400 sets the target color coordinates of the primary color light whose color coordinates are inconsistent in each projection display unit 100 when the color coordinates of the same primary color light among the projection display units 100 are inconsistent, and/or sets the target color coordinates of the primary color light in each projection display unit 100 When the luminances of the same primary color lights do not match, the target luminances of the primary color lights whose luminances do not match in the respective projection display units 100 are set.

The same primary color light among the projection display units 100 refers to the same primary color light in each projection display unit. Assuming that the splicing display device includes two projection display units, namely projection display unit A and projection display unit B, the red primary color light in projection display unit A and the red primary color light in projection display unit B are the The same primary color light between each projection display unit, the green primary color light in projection display unit A and the green primary color light in projection display unit B are the same primary color light between each projection display unit, the blue primary color light in projection display unit A and the projection display unit The blue primary color light in B is the same primary color light among the projection display units.

Specifically, when the color coordinates of the same primary color light among the projection display units 100 are inconsistent, the target value setting unit 400 sets the target color coordinates of the primary color light with inconsistent color coordinates in the projection display units 100 to the same value, such as when When the color coordinates of the red primary color light in the projection display unit A are inconsistent with the color coordinates of the red primary color light in the projection display unit B, the target color coordinates of the red primary color light in the projection display unit A and the red primary color light in the projection display unit B The light's target color coordinates are set to the same value. The target value setting unit 400 sets the target luminances of the primary color lights whose luminances are inconsistent among the projection display units 100 to the same value when the brightness of the same primary color light among the projection display units 100 is inconsistent, such as when the projection display unit A When the brightness of the primary red light is inconsistent with that of the projection display unit B, set the target brightness of the primary red light in the projection display unit A and the target brightness of the primary red light in the projection display unit B to the same value. For other primary color lights, the basic principles are the same, and will not be repeated here.

Preferably, the target value setting unit 400 sets the target color coordinates of the primary color light according to the color coordinates of the primary color light in each projection display unit 100 . In this embodiment, when setting the target color coordinates of the primary color light according to the color coordinates of the same primary color light of each projection display unit 100 , it can be set according to the specific requirements for the color of the spliced display device. Specifically, the target color coordinates of the primary color light of each projection display unit 100 may be set as an average value, a maximum value, an intermediate value, etc. of the color coordinates of the primary color light of each projection display unit 100 . For example, when the projection display device includes a projection display unit A and a projection display unit B, the target value setting unit 400 can set the target color coordinates of the red primary color light of each projection display unit 100 as the color coordinates of the red primary color light of the projection display unit A and the average value, the maximum value or the maximum value of the color coordinates of the red primary color light of the projection display unit B. For other primary color lights, the principle is the same, and will not be repeated here. The purpose of setting the target color coordinates of each primary color light in each projection display unit 100 is to adjust the color coordinates of the same primary color light whose color coordinates are inconsistent in each projection display unit 100 to the target color coordinates, so that each projection display unit The color coordinates of the same primary color light between 100 and 100 are consistent, so that the colors of the projection display units are consistent. Different target color coordinates can be set for different primary color lights, for example, the same target color coordinates can be set for the red primary color light and green primary color light of the projection display unit 100 , or different target color coordinates can be set.

Preferably, the target value setting unit 400 sets the target brightness of the primary color light according to the brightness and white balance of the primary color light in each projection display unit 100, so that the target brightness of the same primary color light in each projection display unit 100 is the same, and different primary color light White balance is maintained between the target brightness of light.

Embodiment two

FIG. 10 shows the structure of a projection display unit provided by another embodiment of the present invention. The projection display unit adds a first imaging component 103 on the basis of the projection display unit shown in FIG. 3 . The first imaging component 103 includes an optical relay component 131 , a TIR prism 132 , a spatial light modulation component 133 and a projection lens 134 . The optical relay component 131 may include a square rod, a relay lens, and the like. The spatial light modulation component 133 includes a piece of digital micromirror device (such as DMD). Wherein the optical relay assembly 131 relays the light emitted by the color wheel assembly 102 to the TIR prism 132, and the TIR prism 132 guides the light relayed by the optical relay assembly into the digital micromirror device, and the imaging light emitted by the digital micromirror device The projection lens 134 is introduced.

In a preferred embodiment of the present invention, the light source module 101 in the projection display unit usually uses a semiconductor laser. The light source module 101 includes an excitation light source and a compensation light source, and may also include a third light source. The compensation light source includes a cyan laser light source and/or a red laser light source. The timing sequence of the cyan laser of the compensation light source is the same as that of the blue light and green light emitted by the color wheel assembly 102 , and the timing sequence of the red laser light of the compensation light source is the same as that of the red light emitted by the color wheel assembly 102 .

The excitation light source is a blue laser 112, and the blue laser emitted by it has a dominant wavelength of 445nm. The cyan laser light of the compensation light source is generated by the cyan laser 113 , and the red laser light of the compensation light source is generated by the red laser 111 . The dominant wavelength of the blue-green laser emitted by the cyan-green laser 113 is preferably any value between 510nm-530nm, including the endpoint value, and the dominant wavelength of the red laser emitted by the red-light laser 111 is preferably any value between 625nm-645nm, including the endpoint value . In this embodiment, the preferred dominant wavelength of the cyan laser is 520nm, and the dominant wavelength of the red laser is 638nm.

The color wheel assembly 102 includes a fluorescent wheel 121 and a filter wheel 122 that rotates synchronously with the fluorescent wheel 121, wherein the segmented area of the fluorescent wheel 121 is shown in FIG. The segmented region of the layer (called the blue scattering region) 1021, the segmented region provided with the green wavelength conversion layer (called the green phosphor region) 1022 and the segmented region provided with the red wavelength conversion layer (called the red fluorescent area) 1023, the filter wheel 122 includes a green filter area set corresponding to the green fluorescent area 1022, and a red filter area set corresponding to the red fluorescent area 1023, the color wheel assembly 102 also includes a driving device, such as a motor, etc. It is used to drive the fluorescent wheel 121 and the filter wheel 122 to rotate synchronously. Wherein, the surface of the green fluorescent area 22 is provided with green fluorescent powder, the surface of the blue scattering area 21 is provided with scattering powder, and the surface of the red fluorescent area 23 is provided with red fluorescent powder. The function of the fluorescent powder is to convert short-wavelength light into long-wavelength light light; the filter area on the filter wheel 122 is usually a filter, and in this embodiment, the blue laser passes through the rotating fluorescent wheel 121 to generate time-sequenced RG1B trichromatic light, and the emitted blue light is narrow-band spectrum light, which is different from blue The laser is the same, but the red light and green light are light with a broadband spectrum. In order to improve the color purity, the filter wheel 122 mainly filters the red light and green light, and the green filter is used to filter out the green light with a wavelength range of 460nm Green light between -490nm and greater than 590nm, the wavelength range includes the endpoint value, and the red filter is used to filter out red light with a wavelength less than or equal to 600nm.

In this embodiment, the blue laser of the blue laser 112 has a dominant wavelength of 445nm, the cyan laser 113 of the compensation light source emits a cyan laser with a dominant wavelength of 520nm, and the red laser 111 emits a red laser with a dominant wavelength of 638nm. When the color wheel assembly 102 is in the blue timing segment, the cyan laser 113 and the blue laser 112 are turned on, and the blue laser and the cyan laser pass through the blue scattering area 21 to generate the mixed light of the blue light and the cyan laser; when the color wheel assembly 102 is in the green timing During the period, the cyan laser 113 and the blue laser 112 are turned on, and the blue laser and the cyan laser pass through the green fluorescent region 1022 to generate the mixed light of the green and cyan laser, which is filtered by the green filter; when the color wheel assembly 102 is in the red During the timing period, the red laser is turned on, and the red laser passes through the red fluorescent region 1023 to generate mixed light of red light and red laser, which is filtered by the red filter. After the filtered light is homogenized by the square rod, it is incident on the TIR prism 132 through the light relay lens, reflected to the DMD chip for modulation, and finally projected on the screen through the projection lens 134 to form a projection picture.

In this embodiment, by adding a compensation light source, it is used to compensate the RG1B three primary color lights emitted by the color wheel assembly 102, wherein the red light emitted by the red laser light source is used to adjust the color coordinates of the red light, and the red light emitted by the cyan laser light source The cyan light is used to adjust the color coordinates of blue light and green light, so that the color coordinates of red light, green light and blue light can be adjusted, and then the color coordinate range of the projection system using the light emitting device can be changed.

In an embodiment, it is preferable to use the DCI standard color coordinates as the target color coordinates. By adjusting the compensation light source, the red light, green light and blue light emitted by the color wheel assembly can be the same as the standard color coordinates of the corresponding color light in the DCI standard color coordinates. Or similar, to reduce the difference between the color coordinates of the outgoing light and the DCI standard color coordinates, wherein the cyan-green laser 113 is used to compensate the color coordinates of the blue light and green light in the RG1B three-primary color light, and the red laser 111 is used for In order to compensate the color coordinates of the red light in the RG1B three-primary color light, the DCI color coordinates of the compensated green light are (0.265±0.02, 0.69±0.02), and the DCI color coordinates of the compensated red light are (0.68±0.02, 0.32±0.02), the DCI color coordinates of the compensated blue light are (0.15±0.01, 0.06±0.01).

Embodiment three

Fig. 11 shows a schematic structural diagram of a spliced display device provided by another embodiment of the present invention. The splicing display device improves the splicing control unit on the basis of the splicing display device shown in FIG. 2 . The splicing control unit 200 also includes a first brightness control module 220 . The first brightness control module 220 adjusts the brightness of the compensation light emitted by the color wheel assembly under the illumination of the compensation light source and the brightness of the received light emitted by the color wheel assembly under the illumination of the excitation light source, which has a spectral overlap with the compensation light, in equal proportions, In order to adjust the brightness of the first primary color light in each projection display unit 100 to the target brightness of the first primary color light.

In this embodiment, the color coordinates of the first primary color light of each projection display unit 100 are adjusted to the first primary color by modulating the compensation light source and the excitation light source in each projection display unit 100 through the color coordinate adjustment module 210 respectively. After the target color coordinates of the light are set, the first brightness control module 220 adjusts the output powers of the compensation light source and the excitation light source to adjust The compensation light emitted by the color wheel assembly under the illumination of the compensation light source and the brightness of the compensated light emitted by the color wheel assembly under the illumination of the excitation light source, which has a spectral overlap with the compensation light, are used to display the first light in each projection display unit 100 The brightness of the primary color light is adjusted to the target brightness of the first primary color light, so that the brightness of the first primary color light in each projection display unit 100 is consistent.

Embodiment Four

FIG. 12 is a schematic structural diagram of a projection display unit provided by another embodiment of the present invention. The projection display unit adds a second imaging component 104 on the basis of the projection display unit shown in FIG. 3 . The second imaging component 104 includes an optical relay component 141 , a TIR prism 142 , a light splitting and combining prism 143 , a spatial light modulation component including a first DMD 144 a and a second DMD 144 b , and a projection lens 145 . The optical relay component 141 may include a square rod, a relay lens, and the like. The light-splitting and combining prism 143 specifically includes a first prism and a second prism, and the light-splitting film 110 is located between the first prism and the second prism. The spectroscopic film 110 is a low-pass spectroscopic film or a band-pass spectroscopic film.

Wherein the optical relay assembly 141 relays the light emitted by the color wheel assembly 102 to the TIR prism 142, and the TIR prism 142 guides the light relayed by the optical relay assembly 141 into the light splitting and combining prism 143, and the light splitting and combining prism 143 converts the TIR prism The light introduced by 142 is divided into light transmitted along the first optical path and light transmitted along the second optical path, and the first digital micromirror device 144a modulates the light transmitted along the first optical path to obtain the first imaging light, and the second digital micromirror The device 144b modulates the light transmitted along the second optical path to obtain the second imaging light. The light splitting and combining prism 143 combines the first imaging light and the second imaging light and guides them into the projection lens 145 through the TIR prism 142 .

In a preferred embodiment of the present invention, the light source module 101 in the projection display unit is usually a semiconductor laser. The light source module 101 includes an excitation light source 111 and a compensation light source. The compensation light source includes a cyan laser 112 and a red laser 113.

Wherein the color wheel assembly 102 includes a fluorescent wheel, and the distribution of the segmented areas on the fluorescent wheel is as shown in FIG. Segmented region (also called blue light scattering region) 1025 with scattering layer. The color wheel assembly 102 emits sequential blue light and yellow light under the excitation of the excitation light source 111, wherein the blue light scattering area 1021 has scattering powder, which is used to scatter the incident light and emit it, such as converting the polarized blue laser light into Unpolarized blue light. The yellow fluorescent region 1022 has yellow fluorescent powder, and the function of the fluorescent powder is to convert short-wavelength light into long-wavelength light. Therefore, the blue laser emitted by the excitation light source excites the yellow phosphor to obtain yellow fluorescence. The color wheel assembly 102 also has a driving device, such as a motor, for driving the fluorescent wheel to rotate.

In this embodiment, the cyan laser light 112 of the compensation light source is generated by a cyan laser, the red laser light 113 of the compensation light source is generated by a red light laser, and the excitation light source 111 is a blue light laser. The dominant wavelength of the blue laser emitted by the blue laser is 445nm, the dominant wavelength range of the green laser emitted by the cyan laser is any value between 510nm-530nm, including the endpoint value, and the dominant wavelength range of the red laser emitted by the red laser is 625nm Any value between -645nm, inclusive of endpoints. Preferably, the dominant wavelength of the cyan laser is 520nm, and the dominant wavelength of the red laser is 638nm.

The cyan laser 112 of the compensation light source is turned on during the entire timing of the color wheel assembly 102, that is, the cyan laser is turned on when the color wheel assembly 102 emits yellow light and blue light; The light timing is the same, that is, the red laser is only turned on when the color wheel assembly 102 emits yellow light.

In the yellow time period and the blue time period, the cyan laser and the excitation light source 111 are turned on for color coordinate compensation of the blue light and the green light in the RGB three primary color lights. In the yellow time sequence segment, the red laser is turned on for color coordinate compensation of the red light in the RGB three primary colors. By setting the color coordinates of the red laser and the cyan laser, the compensated red, green and blue color coordinates can be within the set range.

In the embodiment of the present invention, when the light-splitting film 110 is a low-pass light-splitting film, the light-splitting and light-combining prism 143 distributes the blue light and green light in the incident light to the first digital micromirror device 144a, and divides the blue light and green light in the incident light The red light is distributed to the second DMD 144b. Examples are as follows:

Assuming that the time sequence of the light emitted by the color wheel assembly 102 of the projection display unit is shown in FIG. 8c, please refer to FIG. Optical timing diagram of the micromirror device 144b. That is, the low-pass spectroscopic film 110 transmits the blue light B1, the green light G2 in the yellow light Y and the cyan light C to the first digital micromirror device 144a, and reflects the red light R3 in the yellow light Y and the red light emitted by the red laser light source R1 to the second digital micromirror device 144b, the green light C and the green light G2 in the yellow light Y are mixed, which can change the color coordinates of the green light and bring the color coordinates of the green light closer to the DCI standard color coordinates of green light (0.265, 0.69 ) near the cyan light C mixed with blue light B1, which can change the blue light color coordinates and bring the blue light color coordinates closer to the blue light DCI standard color coordinates (0.15, 0.06); similarly, the red light R1 emitted by the red laser light source and the yellow light in the The red light R3 mix can change the red light color coordinates and bring the red light color coordinates closer to the red light DCI standard color coordinates (0.68, 0.32).

Please refer to FIG. 13 b , which is an optical timing diagram of the first digital micromirror device 144 a and the second digital micromirror device 144 b provided in this embodiment when a bandpass splitter film is used.

When the light-splitting film 110 is a band-pass light-splitting film, the light-splitting and combining prism 143 distributes the blue light and red light in the incident light to the first digital micromirror device 144a, and distributes the green light in the incident light to the second digital micromirror device 144a. Micromirror device 144b. Examples are as follows:

Assuming that the time sequence of the light emitted by the color wheel assembly 102 of the projection display unit is shown in FIG. 8c, please refer to FIG. Optical timing diagram of the micromirror device 144b. That is, the bandpass spectroscopic film 110 transmits the blue light B1 and the red light R3 separated from the yellow light Y and the red light R1 emitted by the red laser light source to the first digital micromirror device 144a, and reflects the green light C and the yellow light Y separated The green light G2 is directed onto the second digital micromirror device 144b.

In this embodiment, the cyan light C and the blue light B1 used to supplement the blue light are assigned to different digital micromirror devices. , which is beneficial to the heat dissipation of the digital micromirror device.

In this embodiment, the DCI color coordinates of the compensated green light are (0.265±0.02, 0.69±0.02), the DCI color coordinates of the compensated red light are (0.68±0.02, 0.32±0.02), and the DCI color coordinates of the compensated blue light are is (0.15±0.01, 0.06±0.01).

Embodiment five

FIG. 14 shows a schematic structural diagram of a projection display unit provided by another embodiment of the present invention. The projection display unit adds a third imaging device 105 on the basis of the projection display unit shown in FIG. 3 . The third imaging device 105 includes an optical relay assembly 151, a TIR prism 152, a light splitting and combining prism 153, and a spatial light including a first digital micromirror device 154a, a second digital micromirror device 154b and a third digital micromirror device 154c. Modulation assembly and projection lens 155 . The optical relay component 151 may include a square rod, a relay lens, and the like. in:

The light relay assembly 151 relays the light emitted by the color wheel assembly 102 to the TIR prism 152, and the TIR prism 152 guides the light into the light-splitting and combining prism 153, and the light-splitting and combining prism 153 divides the incident light into light transmitted along the first optical path, Light traveling along the second optical path and light traveling along the third optical path. The first digital micromirror device 154a modulates the light transmitted along the first optical path to obtain the first imaging light; the second digital micromirror device 154b modulates the light transmitted along the second optical path to obtain the second imaging light; the third The digital micromirror device 154c modulates the light transmitted along the third optical path to obtain the third imaging light. The light splitting and combining prism 153 combines the first imaging light, the second imaging light and the third imaging light into the projection lens 155 through the TIR prism 152 .

The light source module 101 in the projection display unit includes an excitation light source and a compensation light source. The compensation light source includes cyan laser and/or red laser. The light source module 101 is turned on during the entire time sequence, that is, the excitation light source, the cyan laser and the red laser included in the light source module 101 are continuously turned on during the entire projection time sequence. The excitation light source includes a first blue light source 111 . Preferably, the blue laser wavelength emitted by the first blue light source 111 is 445nm, the wavelength range of the green laser emitted by the green laser 112 is 510nm-530nm, including the endpoint value, and the red laser emitted by the red laser 113 has a wavelength range of 625nm-645nm, inclusive of endpoints.

Color wheel assembly 102 includes an all yellow wheel 123 . The all-yellow wheel 123 is in the transmission path of the blue light B1 emitted by the first blue light source 111, the red light R1 emitted by the red laser light source 112, and the cyan light C emitted by the cyan laser light source 113. The light simultaneously emitted by the light source 112 and the cyan laser light source 113 includes yellow light Y, blue light B1 , red light R1 and cyan light C. The all-yellow wheel 123 is provided with a yellow light wavelength conversion layer including a yellow light wavelength conversion material along its circumferential direction. Wherein, the yellow light wavelength conversion material may be yellow fluorescent powder or the like.

The light splitting and combining device 153 transmits the blue light B1 separated from the light emitted from the all-yellow wheel 123 to the first digital micromirror device 154a along the first optical path for modulation, and uses the blue light B1 as the blue primary color light of the projection display unit . At this time, since the blue light distributed to the first digital micromirror device 154a is the afterglow after exciting the yellow phosphor, the range of color coordinates is uncertain. Therefore, the part of the blue light Y whose wavelength range is close to the blue light B1 can be The light is transmitted to the first digital micromirror device 154a along the first optical path, and the blue light B1 and the blue light separated from the yellow light are simultaneously modulated by the first digital micromirror device 154a, and the mixed light of the blue light B1 and the blue light is As the blue primary color light of the projection display unit, the color coordinate range of the blue light of the projection display unit is adjusted.

The specific calculation method of the wavelength range of the blue light separated from the yellow light can be as follows: calculate the ratio of the blue light B1 to the blue light separated from the yellow light according to the target color coordinates of the blue light and the color coordinates of the blue light B1, The ratio of the separated blue light can determine the wavelength range of the blue light separated from the yellow light. The specific calculation process is not repeated here because it belongs to the prior art.

The light splitting and combining device 153 transmits the red light R3 in the yellow light Y and the red light R1 emitted by the red laser light source to the second digital micromirror device 154b along the second optical path, and the R1 and R3 are simultaneously treated by the second digital micromirror device 154b Modulation is performed, and the mixed light of red light R3 in the yellow light and red light R1 emitted by the red laser light source is used as the red primary color light of the projection display unit, so as to adjust the color coordinate range of the red light of the projection display unit.

The light splitting and combining device 153 transmits the green light G2 in the yellow light Y and the cyan light C emitted by the cyan laser light source to the third digital micromirror device 154c along the third optical path, and the third digital micromirror device 154c is opposite to the green light G2 and the cyan light C. The light C is modulated at the same time, and the mixed light of the green light G2 in the yellow light Y and the cyan light C emitted by the cyan laser light source is used as the green primary color light of the projection display unit to adjust the color coordinate range of the green light of the projection display unit.

In this embodiment, the DCI standard color coordinates may be used as a standard for adjusting the color coordinates, so that the red light, green light, and blue light after compensation are the same or similar to the color coordinates of the corresponding color lights in the DCI standard color coordinates. The DCI color coordinates of green light after compensation in this scheme are (0.265±0.02, 0.69±0.02), the DCI color coordinates of red light after compensation are (0.68±0.02, 0.32±0.02), and the DCI color coordinates of blue light after compensation are (0.15 ±0.01, 0.06±0.01).

Embodiment six

As shown in Figure 15, on the basis of the projection display unit provided in the fifth embodiment above, the exciting light source further includes a second blue light source 114, and the color wheel assembly 102 also includes a transmission path for the blue light B2 emitted by the second blue light source 114 All blue wheel 124 in. The projection display unit further includes a reflection mirror 204 and a dichroic mirror 205 . The full blue wheel 124 decoheres the blue light emitted by the second blue light source 114 by scattering.

The dominant wavelength of the blue laser light emitted by the second blue light source 114 is preferably 462nm, and the full blue wheel 124 is provided with a scattering layer along its circumferential direction, and the scattering layer includes scattering powder for scattering and emitting the incident light, as The role of the scattering powder is to convert the polarized blue light into non-polarized blue light. Therefore, the second blue light source 114 emits blue light B2 after passing through the all-blue wheel 124 .

The reflector 204 is used to reflect the blue light B2 emitted by the all-blue wheel 124 to the dichroic mirror 205, and the dichroic mirror 205 combines the light emitted by the all-yellow wheel 123 and the light emitted by the all-blue wheel 124 to form a combined path. The light is relayed to the TIR prism 152 through the optical relay component 151. The dichroic mirror 205 transmits red light and green light, and reflects blue light, that is, the dichroic mirror 205 transmits yellow light Y, red light R1 and cyan light C in the light emitted by the all-yellow wheel 123, and reflects the all-yellow wheel 123 The blue light B1 in the outgoing light, and the dichroic mirror 205 reflects the blue light B2 emitted by the all-blue wheel 203, so that the combined light formed after the combination of the dichroic mirror 205 includes yellow light Y and red light R1 , cyan light C and blue light B2 , the combined light is relayed to the TIR prism 152 through the optical relay component 151 . Through the TIR prism 152, it is introduced into the light splitting and combining prism 153 .

The light-splitting and combining prism 153 separates the blue light B2 from the combined light, and makes the separated blue light B2 transmit to the first digital micromirror device 154a along the first optical path, modulates by the first digital micromirror device 154a, and transmits the blue light B2 to the first digital micromirror device 154a. The blue light B2 is used as the blue primary color light of the projection display unit.

The light-splitting and combining prism 153 separates the red light R1 from the combined light and the red light R3 from the yellow light in the combined light, and transmits the separated red light R1 and red light R3 to the second digital microprocessor along the second optical path. The mirror device 154b is modulated by the second digital micromirror device 154b, and uses the mixed light of the red light R1 and the red light R3 as the red primary color light of the projection display unit.

The light-splitting and combining prism 153 separates the cyan light C and the green light G2 from the yellow light in the combined light, and transmits the separated cyan light C and green light G2 along the third optical path to the third digital The micromirror device 154c is modulated by the third digital micromirror device 154c, and uses the mixed light of the cyan light C and the green light G2 as the green primary color light of the projection display unit.

In this embodiment, the range of color coordinates is compensated by adding a compensation light source, 520nm cyan light is used to compensate the color coordinates of green light, and 638nm red light is used to compensate the color coordinates of red light. For the compensation of red light color coordinates, the 638nm red laser can well compensate the red light color coordinates to (0.68±0.02, 0.32±0.02), which is very close to the DCI standard red light color coordinates (0.68, 0.32).

In this embodiment, since two sets of excitation light sources, the first blue light source 111 and the second blue light source 114, are used, the 462nm blue laser emitted by the second blue light source 114 is used as the blue primary color light of the projection display unit, and its color coordinates can satisfy DCI. Blue light color coordinate standard; the 445nm blue laser emitted by the first blue light source 111 is used to excite the yellow phosphor to generate yellow light, the yellow light is separated into green light G2 and red light R3, and the 520nm blue-green laser is used to compensate the green light G2, so that The color coordinates of the green primary color light of the projection display unit meet the DCI green light color coordinate standard; the 638nm red laser is used to compensate the red light R3, so that the color coordinates of the red primary color light of the projection display unit meet the DCI red light color coordinate standard.

It can be seen from the above description that the projection display unit provided by the embodiment of the present application can independently adjust the color coordinates of the primary color light of each projection display unit by adding a compensation light source, as long as the color coordinates of the same primary color light of each projection display unit are adjusted To the same value, the consistency of the color coordinates of each primary color light of each projection display unit can be guaranteed, and it is realized by directly adjusting the compensation light source and the excitation light source in the light source module of each projection display unit, thereby avoiding The problem of the loss of the color coordinate range caused by ensuring the color coordinate consistency through the CCA correction method in the prior art is solved, and the color gamut range is not lost while ensuring the color consistency of each projection display unit.

Embodiment seven

Fig. 16 shows the structure of a spliced display device provided by another embodiment of the present invention. The splicing display device is an improvement made on the basis of the splicing display device shown in FIG. 2 , and reference is made to the splicing display device shown in FIG. 2 for parts not described in detail. The projection display unit in the spliced display device includes a second imaging component as shown in FIG. 11 , or a third imaging component as shown in FIG. 14 or 15 . Wherein the structure of the color wheel assembly in the projection display unit is: the wavelength conversion layer arranged on the segmented area arranged along the moving direction of the color wheel assembly includes the first wavelength conversion layer that emits the first received light under the irradiation of the exciting light source 111 layer, and the compensation light source 112 includes a first compensation light source emitting first compensation light and a second compensation light source emitting second compensation light having a different wavelength band from the first compensation light.

Wherein the first compensation light and the first received light have spectral overlap, the second compensation light and the first received light also have spectral overlap, and the mixed light of the first compensation light and the first wavelength band light in the first received light forms a projection display The mixed light of the first light of the first primary color light of the unit, the second compensation light and the light of the second wavelength band in the first received light forms the second light of the first primary color light of the projection display unit. Examples are as follows:

The first wavelength conversion layer is a yellow wavelength conversion layer, the first compensation light source is a red laser light source, and the second compensation light source is a cyan laser light source. Then the first receiving light is yellow light Y, the first compensation light is red light R1, the second compensation light is cyan light C, the first waveband light in the first receiving light is red light R3, and the second compensation light in the first receiving light is red light R3. The second-band light is green light G2. The first light in the first primary color light is the red primary color light formed by mixing red light R1 and red light R3 in each projection display unit 100, and the second light in the first primary color light is the red primary color light in each projection display unit 100. Green-based color light formed by mixing cyan light C and green light G2.

The color coordinate adjustment module 210 includes a first color coordinate adjustment module 211 and a second color coordinate adjustment module 212 . in:

The first color coordinate adjustment module 211 modulates the output power of the first compensating light source and the output power of the excitation light source in each projection display unit 100 to adjust the output power of the first light in the first primary color light of each projection display unit 100 to The color coordinates are adjusted to the target color coordinates of the first light in the first primary color light.

Specifically, the first color coordinate adjustment module 211 changes the output power of the first compensation light source by changing the driving current of the first compensation light source in each projection display unit 100 , and changes the driving current of the excitation light source in each projection display unit 100 Current to change the output power of the excitation light source.

The second color coordinate adjustment module 212 adjusts the output power of the second compensation light source in each projection display unit 100 under the condition that the ratio between the output power of the first compensation light source and the output power of the excitation light source in each projection display unit 100 remains unchanged. The power is modulated to adjust the color coordinate of the second light in the first primary color light of each projection display unit 100 to the target color coordinate of the second light in the first primary color light.

In this embodiment, since both the light of the first wavelength band in the first receiving light and the light of the second band in the first receiving light are associated with the excitation light source, when the output power of the excitation light source is adjusted by the first color coordinate adjustment module 211 After modulation is performed to adjust the light in the first wavelength band in the first receiving light, in order to ensure that the ratio of the output power of the first compensation light source to the output power of the excitation light source in each projection display unit 100 remains unchanged, the second color coordinate The adjustment module 212 can adjust the gray scale of the second compensation light in each projection display unit 100 by modulating the output power of the second compensation light source in each projection display unit 100 without changing the output power of the excitation light source The ratio of the brightness to the gray-scale brightness of the second wavelength band light in the first subject light, so as to adjust the color coordinates of the first light of the first primary color light of each projection display unit 100 to the first light target of the first primary color light color coordinates.

The splicing control unit 200 also includes a second brightness adjustment module 230 and a third brightness adjustment module 240 . in:

The second brightness adjustment module 230 adjusts the first compensating light source in each projection display unit 100 proportionally while ensuring that the ratio between the output power of the first compensation light source and the output power of the excitation light source in each projection display unit 100 remains unchanged. The output power of the light source and the output power of the excitation light source are used to adjust the brightness of the first light of the first primary color light of each projection display unit to the target brightness of the first light of the first primary color light.

Specifically, after the first color coordinate adjustment module 211 modulates the output power of the first compensation light source and the output power of the excitation light source in each projection display unit 100 to adjust the color coordinate of the first light in the first primary color light The second brightness adjustment module 230 adjusts the second brightness adjustment module 230 in each projection display unit 100 in proportion to the ratio of the output power of the first compensation light source to the output power of the excitation light source in each projection display unit 100. The output power of the compensation light source and the output power of the excitation light source will not change the ratio of the first compensation light included in the first light of the first primary color light and the first wavelength band light in the first subject light, therefore, it can be On the premise of the color coordinates of the first light of the first primary color light, the brightness of the first light of the first primary color light of each projection display unit is adjusted to the target brightness of the first light of the first primary color light.

The third brightness adjustment module 240 adjusts the first primary color under the condition that the output power of the excitation light source remains unchanged and the ratio of the output power of the second compensation light source in each projection display unit 100 to the output power of the excitation light source remains unchanged. The gray value corresponding to the second light in the light, so as to adjust the brightness of the second light in the first primary color light of each projection display unit 100 to the target brightness of the second light in the first primary color light.

The grayscale value corresponding to the second light in the first primary color light is used to control the spatial light modulation component to modulate the second light in the first primary color light.

Specifically, in this embodiment, after adjusting the color coordinates of the first light in the first primary color light of the projection display unit through the first color coordinate adjustment module 211, the output power of the first compensation light source and the output power of the excitation light source are determined. After adjusting the brightness of the first light in the first primary color light of the projection display unit through the second brightness adjustment module 230, the specific value of the output power of the first compensation light source and the output of the excitation light source are determined. For the specific value of the power, the specific value of the output power of the second compensation light source is determined after adjusting the color coordinates of the second light of the first primary color light of the projection display unit through the second color coordinate adjustment module 212. At this time, the third If the brightness adjustment module 240 modulates the light source of the projection display unit 100, the adjusted color coordinates and brightness of the first light of the first primary color light and the color coordinates of the second light of the first primary color light may be affected. Therefore, in order to avoid this problem, the third brightness adjustment module 240 ensures that the output power of the excitation light source remains unchanged, and ensures that the ratio of the output power of the second compensation light source in each projection display unit 100 to the output power of the excitation light source remains unchanged. In the case of , the brightness of the second light of the first primary color light of each projection display unit 100 is adjusted by modulating the grayscale value used to control the spatial light modulation component to modulate the second light of the first primary color light The target brightness of the second light to the first primary color light.

A specific example is used below to illustrate, assuming that the excitation light source is a blue light source, the first compensation light source is a red laser light source that emits red light R1, and the second compensation light source is a cyan laser light source that emits cyan light C. The color wheel assembly 102 is shown in Figure 7, that is, the first wavelength conversion layer provided on one of the segmented regions of the color wheel assembly 102 is a yellow wavelength conversion layer that emits yellow light Y under the irradiation of a blue light source. The wheel assembly 102 also includes a segmented area provided with a diffusion layer (ie section B in FIG. 7 ). The red light R1 is mixed with the red light R3 in the yellow light Y to form the red primary color light of the projection display unit 100 , and the cyan light C is mixed with the green light G2 in the yellow light Y to form the green primary color light of the projection display unit 100 .

Then the first color coordinate adjustment module 211 adjusts the red light R1 and the red light in the red primary color light of each projection display unit 100 by modulating the output power of the red laser light source and the output power of the excitation light source in each projection display unit 100. The ratio of the light R3 is used to adjust the color coordinates of the red primary color light of each projection display unit 100 to the target color coordinates of the red primary color light.

In this embodiment, in the projection display unit 100, the target color coordinates (X _R , Y _R ) of the red primary color light, the color coordinates (X _R1 , Y _R1 ) of the red light R1 and the color coordinates (X _R2 ) of the red light R3 , Y _R2 ) are known, the first color coordinate adjustment module 211 can determine the ratio between L _R1 and L _R2 according to the formula (2), so that the first color coordinate adjustment module 211 adjusts the red laser light source The output power of the output power and the output power of the exciting light source are adjusted to ensure that the output power of the adjusted red laser light source and the output power of the exciting light source make the ratio between _LR1 and _LR2 meet the ratio requirements determined according to the above formula (2), That is, the color coordinates of the red primary color light in each projection display unit 100 can be adjusted to the target color coordinates of the red primary color light.

After the ratio between _LR1 and _LR2 is determined by the first color coordinate adjustment module 211 to adjust the color coordinates of the red primary color light of each projection display unit to the target color coordinates of the red primary color light, the second brightness adjustment The module 230 adjusts the output power of the red laser light source and the excitation power of the red laser light source in each projection display unit 100 in equal proportions while ensuring that the ratio of the output power of the red laser light source in each projection display unit 100 to the output power of the excitation light source remains unchanged. The output power of the light source is used to adjust the brightness of the primary red light of each projection display unit 100 to the target brightness of the primary red light.

Specifically, when the target brightness _LR of the red primary color light is known, and the ratio between _LR1 and _LR2 is guaranteed to meet the ratio requirement determined according to the above formula (2), the second brightness adjustment module 230 according to the formula (2) It can be determined that _LR1 is the first value, and when _LR2 is the second value, the color coordinate of the red primary color light of the projection display unit 100 can be the target color coordinate of the red primary color light, and the brightness of the red primary color light is The target brightness of the red primary color light. Therefore, the second brightness adjustment module 230 changes the output power of the red laser light source by changing the driving current of the red laser light source, so that the brightness of the red light R1 is the first value. At the same time, the second brightness adjustment module 230 changes the output power of the excitation light source by changing the driving current of the excitation light source, so that the brightness of the red light R2 in the yellow light Y is the second value.

After adjusting the color coordinates and brightness of the red primary color light in each projection display unit 100 to be consistent, the second color coordinate adjustment module 212 ensures that the output power of the excitation light source in each projection display unit 100 remains unchanged, The output power of the cyan laser light source in each projection display unit 100 is modulated to adjust the color coordinates of the green primary color light of each projection display unit 100 to the target color coordinates of the green primary color light.

In this embodiment, since the output power of the excitation light source in each projection display unit 100 is known, according to the output power of the excitation light source in each projection display unit 100, the green color of the yellow light Y in each projection display unit 100 can be obtained The brightness L _G2 of the light G2, the target color coordinates (X _G , Y _G ) of the green primary color light in the projection display unit 100, the color coordinates (X _C , Y _C ) of the green light, and the color coordinates (X _{G2 ) of the green light G2} , Y _G2 ) are all known, the second color coordinate adjustment module 212 can determine that when L _C is the third value according to the above formula (3), the color coordinates of the green primary color light of each projection display unit 100 can be adjusted To the target color coordinate of the green primary color light, the second color coordinate adjustment module 212 changes the output power of the cyan laser light source by changing the driving current of the cyan laser light source, so that the brightness of the cyan light C is the third value.

After adjusting the color coordinates and brightness of the red primary color light in each projection display unit to be consistent, and adjusting the color coordinates of the green primary color light in each projection display unit to be consistent, the third brightness adjustment module 240 is used to ensure that the excitation light source When the output power of the cyan laser light source and the output power of the cyan laser light source remain unchanged, the gray value corresponding to the green primary color light is adjusted to adjust the brightness of the green primary color light of each projection display unit 100 to the target brightness of the green primary color light. The gray value corresponding to the green primary color light refers to the grayscale used to control the spatial light modulation component to modulate the green primary color light. For example, when the decoded image signal of the source image includes a red primary color image signal, a green primary color image signal and a blue primary color In the case of an image signal, the grayscale corresponding to the green primary color light is the grayscale in the green primary color image signal.

Embodiment eight

Fig. 17 shows the structure of a spliced display device provided by another embodiment of the present invention. The spliced display device is improved on the basis of the spliced display device shown in Fig. 11 or Fig. 16. The splicing control of the spliced display device The unit 200 also includes a white balance adjustment module 250 . The white balance adjustment module 250 adjusts the brightness of the second primary color light in the projection images projected by each projection display unit 100 , so that the white balance of the projection images projected by each projection display unit 100 reaches a preset target white balance. The second primary color light in the projection image projected by the projection display unit 100 refers to other primary color light of each projection display unit 100 except the first primary color light.

Specifically, the white balance adjustment module 250 changes the brightness of the second primary color light by changing the driving current of the light source corresponding to the second primary color light in each projection display unit 100 . For example, when the primary color light in the projection display unit 100 is excitation light, the white balance adjustment module 250 adjusts the primary color light to the target brightness by changing the brightness of the excitation light, such as by changing the output of the excitation light source that emits the excitation light Power, that is, changing the driving current of the excitation light source that emits the excitation light, to adjust the primary color light to the target brightness.

In this embodiment, since the target brightness is set according to the white balance, after the brightness of the second primary color light in each projection display unit is adjusted to the target brightness by the white balance adjustment module 250, it can ensure that White balance of each projection display unit.

Embodiment nine

Fig. 18 shows the implementation flow of the splicing display control method based on the splicing display device provided by the embodiment of the present invention provided by the embodiment of the present invention, and the details are as follows:

S101. Detect the color coordinates and/or brightness of each primary color light in each projection display unit. For the specific process, refer to the detection unit mentioned above, which will not be repeated here.

S102, when the color coordinates of the same primary color light among the projection display units are inconsistent, set the target color coordinates of the same primary color light among the projection display units, and/or the same primary color light among the projection display units When the luminances of different projection display units are inconsistent, set the target luminance of the same primary color light among the projection display units.

S103. Adjust the color coordinates of the first primary color light of each projection display unit by modulating the compensation light source and excitation light source respectively in each projection display unit, so that the color coordinates of the first primary color light of each projection display unit are consistent. Wherein, the first primary color light of the projection display unit is a mixed light of compensating light and at least part of wavelength bands of the subject light having spectral overlap with the compensation light.

Specifically, adjusting the color coordinates of the first primary color light of each projection display unit by separately modulating the compensation light source and the excitation light source in each projection display unit specifically includes:

On the premise that the following formula is satisfied, the output power of the compensation light source and the output power of the excitation light source in each of the projection display units are respectively modulated:

L _M =L _M1 +L _M2

Wherein L _M is the brightness of the first primary color light, L _M1 is the brightness of the compensation light, L _M2 is the brightness of at least a part of the wavelength bands of the receiving light that overlaps with the compensation light, (X _M , Y _M ) is the target color coordinates of the first primary color light, (X _M1 , Y _M1 ) is the color coordinates of the compensation light, (X _M2 , Y _M2 ) is the color coordinate of the compensation light that has spectral overlap The color coordinates of at least a part of the wavelength bands of the received light.

In another embodiment of the present invention, when the projection display unit includes a first imaging component, and the first imaging component includes a digital micromirror device, the method further includes:

Equally adjusting the brightness of the compensation light emitted by the color wheel assembly under the illumination of the compensation light source and the brightness of the subject light emitted by the color wheel assembly under the illumination of the excitation light source which overlaps with the compensation light in spectrum, so that the first primary color The brightness of the light is adjusted to the target brightness of the first primary color light.

When the projection display unit includes the second imaging component or the third imaging component, if the wavelength conversion layer provided on the color wheel component includes a first wavelength conversion layer that emits the first received light under the illumination of the exciting light source, and the compensation light source includes A first compensation light source for the first compensation light and a second compensation light source for emitting a second compensation light having a different wavelength band from the first compensation light, wherein the first compensation light overlaps with the first received light, and the second compensation light overlaps with the first compensation light. A subject light has spectral overlap, and the mixed light of the first compensation light and the light of the first wavelength band in the first subject light forms the first light of the first primary color light of the projection display unit, and the second compensation light and the first subject light The mixed light of the second wavelength band light in the laser light forms the second light in the first primary color light of the projection display unit. The adjustment of the color coordinates of the first primary color light of each projection display unit specifically includes:

By modulating the output power of the first compensation light source and the output power of the excitation light source in each projection display unit, the color coordinates of the first light in the first primary color light of each projection display unit are adjusted to the first Target color coordinates of the first light in the primary color light;

Under the condition that the ratio of the output power of the first compensation light source in each projection display unit to the output power of the excitation light source remains unchanged, the output power of the second compensation light source in each projection display unit is modulated, so that each projection display unit The color coordinates of the second light in the first primary color light of the display unit are adjusted to the target color coordinates of the second light of the first primary color light.

Further, the method also includes:

Under the condition that the ratio between the output power of the first compensation light source and the output power of the excitation light source in each projection display unit remains unchanged, the output power of the first compensation light source and the output power of the excitation light source in each projection display unit are adjusted in equal proportions. Outputting power to adjust the brightness of the first light in the first primary color light of each projection display unit to the target brightness of the first light in the first primary color light;

When the output power of the excitation light source is guaranteed to be constant, and the ratio of the output power of the second compensation light source in each projection display unit to the output power of the excitation light source is constant, adjust the second The gray value corresponding to the light, so as to adjust the brightness of the second light in the first primary color light of each projection display unit to the target brightness of the second light in the first primary color light;

The gray value corresponding to the second light in the first primary color light is used to control the spatial light modulation component to modulate the second light in the first primary color light.

In another embodiment of the present invention, the method also includes:

Adjusting the brightness of the second primary color light in the projection picture projected by each projection display unit, so that the white balance of the projection picture projected by each projection display unit reaches the preset target white balance, wherein the projection picture obtained by the projection display unit The second primary color light in the projected picture refers to other primary color lights except the first primary color light of each projection display unit.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made by using the description of the present invention and the contents of the accompanying drawings or directly or indirectly used in other related technical fields shall be regarded as included in the scope of patent protection of the present invention.

Claims (25)

1. a kind of splicing display device, including at least one projection display unit and splicing control unit, which is characterized in that described Projection display unit includes:

Light source module group, including being emitted the excitation light source of exciting light and the compensatory light of outgoing compensation light；

Color block component, at least sectional area including the direction of motion distribution along the color block component, and the color block component Timing is emitted an at least stimulated light under excitation light source irradiation；

Wherein there are spectra overlapping, the compensation light exists at least stimulated light in the compensation light and an at least stimulated light It is emitted, and the compensation light and deposits with the compensation light in compensation period for being emitted there are the stimulated light of spectra overlapping of light It can be adjusted independently of each other in the stimulated light of spectra overlapping；

The splicing control unit includes chromaticity coordinates adjustment module, and the chromaticity coordinates adjustment module is used for by each projection Compensatory light and excitation light source in display unit are modulated respectively, to adjust the first primary colours of each projection display unit The chromaticity coordinates of light keeps the chromaticity coordinates of the first primary lights of each projection display unit consistent, and first primary lights are described It compensates light and there are the mixed lights of the stimulated light of at least part wave band in the stimulated light of spectra overlapping with the compensation light.

2. splicing display device as described in claim 1, which is characterized in that the splicing display device further include:

Detection unit, for detecting the chromaticity coordinates of each primary lights and/or brightness in each projection display unit；

Target value setting unit, when the chromaticity coordinates for the identical primary lights between each projection display unit is inconsistent, The target color coordinates of the identical primary lights between each projection display unit are set, and/or in each projection display unit Between identical primary lights brightness it is inconsistent when, the target for setting the identical primary lights between each projection display unit is bright Degree.

3. splicing display device as described in claim 1, which is characterized in that the chromaticity coordinates adjustment module be specifically used for according to It is following require to the output power of the output power of the compensatory light in each projection display unit and excitation light source respectively into Row modulation:

L_M=L_M1+L_M2

Wherein L_MFor the object brightness of first primary lights, L_M1For the brightness of the compensation light, L_M2To be deposited with the compensation light The brightness of the stimulated light of at least part wave band in the stimulated light of spectra overlapping, (X_M, Y_M) be first primary lights mesh Mark chromaticity coordinates, (X_M1, Y_M1) it is the chromaticity coordinates for compensating light, (X_M2, Y_M2) it is to be excited with the compensation light there are spectra overlapping The chromaticity coordinates of the stimulated light of at least part wave band in light.

4. splicing display device as claimed in claim 3, which is characterized in that at least one point in an at least sectional area Section region is equipped with wavelength conversion layer, and the wavelength conversion layer, which absorbs the exciting light, can be emitted stimulated light.

5. splicing display device as claimed in claim 4, which is characterized in that the compensatory light is irradiated in the excitation light source Being equipped with of the color block component, which absorbs the exciting light, can be emitted that there are the wavelength of the stimulated light of spectra overlapping with the compensation light It is opened when the sectional area of conversion layer, the closing when the excitation light source irradiates the remaining segment region of the color block component.

6. splicing display device as claimed in claim 4, which is characterized in that be not provided with wave in an at least sectional area At least one sectional area of long conversion layer is equipped with scattering layer, and the scattering layer carries out the exciting light that the excitation light source is emitted It scatters and is emitted.

7. splicing display device as claimed in claim 6, which is characterized in that the compensatory light is irradiated in the excitation light source The sectional area and being equipped with that being equipped with of the color block component absorbs the wavelength conversion layer that the exciting light can be emitted stimulated light dissipates Unlatching when penetrating the sectional area of layer, the closing when the excitation light source irradiates the remaining segment region of the color block component.

8. splicing display device as claimed in claim 6, which is characterized in that institute of the excitation light source in the color block component There is sectional area to open, alternatively,

The light source module group further includes the third light source for being emitted third light, and the third light and the exciting light are metamerism Light, the excitation light source are opened in the sectional area equipped with wavelength conversion layer of the color block component, are closed in remaining sectional area It closes, the third light source is opened in the sectional area equipped with scattering layer of the color block component, is closed in remaining sectional area.

9. splicing display device as claimed in any one of claims 1 to 8, which is characterized in that the compensatory light includes outgoing The red laser light source of feux rouges and/or the dark green laser light source for being emitted dark green light, the excitation light source are the blue laser for being emitted blue light Light source.

10. splicing display device as claimed in claim 9, which is characterized in that the projection display unit further include:

First image-forming assembly, first image-forming assembly include TIR prism, space Light modulation element and projection lens, described Space Light modulation element includes a Digital Micromirror Device；

The light that the TIR prism is used to for the color block component being emitted imports the Digital Micromirror Device, and the number is micro- The imaging of mirror device outgoing imports the projection lens.

11. splicing display device as claimed in claim 10, which is characterized in that the splicing control unit further include:

First brightness control module, the compensation light that the adjusting color block component for equal proportion is emitted under the irradiation of compensatory light Be emitted under the irradiation of excitation light source with color block component with the compensation light there are the brightness of the stimulated light of spectra overlapping, with By the brightness regulation of first primary lights to the object brightness of first primary lights.

12. such as the described in any item splicing display devices of claim 4 to 8, which is characterized in that the wavelength conversion layer is included in The first wave length conversion layer of the first stimulated light is emitted under the irradiation of the excitation light source, the compensatory light includes that outgoing first is mended The first compensatory light and outgoing of repaying light have the second compensatory light of the second compensation light of different-waveband with the first compensation light, In:

There are spectra overlapping, the second compensation light and first stimulated lights for the first compensation light and first stimulated light There are spectra overlappings, and the mixed light of the first compensation light and the first band light in first stimulated light forms the throwing First light of the first primary lights of shadow display unit, the second compensation light and the second band light in first stimulated light Mixed light forms the second light in the first primary lights of the projection display unit.

13. splicing display device as claimed in claim 12, which is characterized in that the chromaticity coordinates adjustment module includes:

First chromaticity coordinates adjustment module, for passing through the output power to the first compensatory light in each projection display unit It is modulated with the output power of the excitation light source, by first in first primary lights of the projection display unit The chromaticity coordinates of light is adjusted to the target color coordinates of the first light in first primary lights；

Second chromaticity coordinates adjustment module, in the output power for guaranteeing the first compensatory light in each projection display unit With the ratio of the output power of excitation light source it is constant in the case where, to the second compensatory light in each projection display unit Output power is modulated, and the chromaticity coordinates of the second light in first primary lights of each projection display unit is adjusted To the target color coordinates of the second light of first primary lights.

14. splicing display device as claimed in claim 13, which is characterized in that the splicing control unit further include:

Second luminance adjustment module, in the output power for guaranteeing the first compensatory light in each projection display unit and In the case that the ratio of the output power of excitation light source is constant, first in each projection display unit of adjusting of equal proportion is mended The output power of light source and the output power of excitation light source are repaid, by the first primary lights of each projection display unit The object brightness of first light of the brightness regulation of one light into the first primary lights；

Third luminance adjustment module for constant in the output power for guaranteeing excitation light source, and guarantees each Projection Display list In the case that the ratio of the output power of the output power and excitation light source of the second compensatory light in member is constant, institute is adjusted The corresponding gray value of the second light in the first primary lights is stated, by second in the first primary lights of each projection display unit The object brightness of second light of the brightness regulation of light into the first primary lights；

Wherein the corresponding gray value of the second light in first primary lights is for controlling space Light modulation element to described first The second light in primary lights is modulated.

15. the splicing display device as described in claim 11 or 14, which is characterized in that the splicing control unit further include:

White balance adjusting module, for adjusting the bright of the second primary lights in the projected picture that each projection display unit projects Degree, so that the white balance for the projected picture that each projection display unit projects reaches preset target white balance, Described in the second primary lights refer to remaining primary lights in addition to first primary lights of each projection display unit.

16. splicing display device as claimed in claim 15, which is characterized in that the projection display unit further include:

Second image-forming assembly, second image-forming assembly include TIR prism, light splitting light-combining prism, space Light modulation element and Projection lens, the space Light modulation element include the first Digital Micromirror Device and the second Digital Micromirror Device；

The light that the color block component is emitted is divided into along the light of the first optic path and along the second optical path by the light splitting light-combining prism The light of transmission；

First Digital Micromirror Device obtains the first imaging for being modulated to the light along the first optic path；

Second Digital Micromirror Device obtains the second imaging for being modulated to the light along the second optic path；

The light splitting light-combining prism will be imported after first imaging and the second imaging actinic light by the TIR prism The projection lens.

17. splicing display device as claimed in claim 15, which is characterized in that the projection display unit further include:

Third image-forming assembly, the third image-forming assembly include TIR prism, light splitting light-combining prism, space Light modulation element and Projection lens, the space Light modulation element include the first Digital Micromirror Device, the second Digital Micromirror Device, third digital micro-mirror Device；

The light that the color block component is emitted is divided into the light along the first optic path, passed along the second optical path by the light splitting light-combining prism Defeated light and the light along third optic path；

First Digital Micromirror Device obtains the first imaging for being modulated to the light along the first optic path；

Second Digital Micromirror Device obtains the second imaging for being modulated to the light along the second optic path；

The third Digital Micromirror Device obtains third imaging for being modulated to the light along third optic path；

The light splitting light-combining prism passes through after actinic light is imaged in first imaging, second imaging and the third The TIR prism imports the projection lens.

18. a kind of tiled display control method based on the described in any item splicing display devices of claim 1 to 17, feature It is, which comprises

By in each projection display unit compensatory light and excitation light source be modulated respectively, to adjust each throwing The chromaticity coordinates of first primary lights of shadow display unit keeps the chromaticity coordinates of the first primary lights of each projection display unit consistent, First primary lights are the compensation light and there are at least part waves in the stimulated light of spectra overlapping with the compensation light The mixed light of the stimulated light of section.

19. tiled display control method as claimed in claim 18, which is characterized in that the method also includes:

Detect the chromaticity coordinates of each primary lights and/or brightness in each projection display unit；

When the chromaticity coordinates of identical primary lights between each projection display unit is inconsistent, each Projection Display list is set The target color coordinates of identical primary lights between member, and/or identical primary lights between each projection display unit are bright When spending inconsistent, the object brightness of the identical primary lights between each projection display unit is set.

20. tiled display control method as claimed in claim 18, which is characterized in that described by each Projection Display Compensatory light and excitation light source in unit are modulated respectively, to adjust the first primary lights of each projection display unit Chromaticity coordinates specifically includes:

Under the premise of meeting following formula, to the output power and exciting light of the compensatory light in each projection display unit The output power in source is modulated respectively:

L_M=L_M1+L_M2

Wherein L_MFor the brightness of first primary lights, L_M1For the brightness of the compensation light, L_M2For there are light with the compensation light Compose the brightness of the stimulated light of at least part wave band in the stimulated light of overlapping, (X_M, Y_M) be first primary lights aim colour Coordinate, (X_M1, Y_M1) it is the chromaticity coordinates for compensating light, (X_M2, Y_M2) it is that there are in the stimulated light of spectra overlapping with the compensation light At least part wave band stimulated light chromaticity coordinates.

21. such as the described in any item tiled display control methods of claim 18 to 20, when the projection display unit includes the One image-forming assembly, when first image-forming assembly includes a piece of Digital Micromirror Device, which is characterized in that the method also includes:

The compensation light and color block component that the adjusting color block component of equal proportion is emitted under the irradiation of compensatory light are in excitation light source Irradiation under be emitted there are the brightness of the stimulated light of spectra overlapping with the compensation light, by the bright of first primary lights Degree is adjusted to the object brightness of first primary lights.

22. such as the described in any item tiled display control methods of claim 18 to 20, when the projection display unit includes the When two image-forming assemblies or third image-forming assembly, which is characterized in that wavelength conversion layer includes under the irradiation of the excitation light source Be emitted the first wave length conversion layer of the first stimulated light, the compensatory light include be emitted the first compensation light the first compensatory light and Outgoing has the second compensatory light of the second compensation light of different-waveband with the first compensation light, in which:

There are spectra overlapping, the second compensation light and first stimulated lights for the first compensation light and first stimulated light There are spectra overlappings, and the mixed light of the first compensation light and the first band light in first stimulated light forms the throwing First light of the first primary lights of shadow display unit, the second compensation light and the second band light in first stimulated light Mixed light forms the second light in the first primary lights of the projection display unit.

23. tiled display control method as claimed in claim 22, which is characterized in that described by each Projection Display Compensatory light and excitation light source in unit are modulated respectively, to adjust the first primary lights of each projection display unit Chromaticity coordinates specifically includes:

Pass through the output work of output power and the excitation light source to the first compensatory light in each projection display unit Rate is modulated, and the chromaticity coordinates of the first light in first primary lights of the projection display unit is adjusted to described The target color coordinates of the first light in one primary lights；

The output power of the output power and excitation light source of the first compensatory light in each projection display unit of guarantee In the case that ratio is constant, the output power of the second compensatory light in each projection display unit is modulated, it will The chromaticity coordinates of the second light in first primary lights of each projection display unit is adjusted to the of first primary lights The target color coordinates of two light.

24. tiled display control method as claimed in claim 23, which is characterized in that the method also includes:

The output power of the output power and excitation light source of the first compensatory light in each projection display unit of guarantee In the case that ratio is constant, the output power of the first compensatory light in each projection display unit of adjusting of equal proportion and swash The output power of light emitting source, by the brightness regulation of the first light in the first primary lights of each projection display unit to first The object brightness of the first light in primary lights；

It is constant in the output power for guaranteeing excitation light source, and the second compensatory light in each projection display unit of guarantee is defeated In the case that the ratio of the output power of power and the excitation light source is constant out, the second light in first primary lights is adjusted Corresponding gray value, by the brightness regulation of the second light in the first primary lights of each projection display unit to the first primary colours The object brightness of the second light in light；

Wherein the corresponding gray value of the second light in first primary lights is for controlling space Light modulation element to described first The second light in primary lights is modulated.

25. tiled display control method as claimed in claim 24, which is characterized in that the method also includes:

The brightness of the second primary lights in the projected picture that each projection display unit projects is adjusted, so that each projection is aobvious Show that the white balance for the projected picture that unit projects reaches preset target white balance, wherein second primary lights refer to Remaining primary lights in addition to first primary lights of each projection display unit.