CN204595412U - Light-emitting device and optical projection system - Google Patents

Abstract

The utility model is applicable to the field of optical technology, and provides a light emitting device and a projection system. The light emitting device includes a light source module, including an excitation light source emitting excitation light and a compensation light source emitting compensation light; At least one segmental area of the distribution of the moving direction of the color wheel assembly, and the color wheel assembly emits the compensation light and the first light including at least one stimulated light under the illumination of the excitation light source and the compensation light source; Wherein the compensation light has a spectrum overlap with at least one subject light in the first light, the compensation light and the subject light having a spectrum overlap with the compensation light are emitted simultaneously, and the compensation light and the compensation light Stimulated light sources with spectral overlap can be tuned independently of each other. The utility model can greatly improve the brightness of the light emitting device and the light utilization efficiency in the light emitting device.

Description

Lighting devices and projection systems

This application claims the priority of the following invention patent submitted by the applicant on December 8, 2014: the application number is 201410743527.3, the name of the invention is "a projection system, projector and video wall display system", the application number is 201410742643.3, the name of the invention It is "a projection system, projector and video wall display system", the application number is 201410745203.3, and the title of the invention is "a projection system, projector and video wall display system".

technical field

The utility model relates to the field of optical technology, more specifically, to a light emitting device and a projection system.

Background technique

The prior art provides a light-emitting device for a projection system in which a semiconductor laser excites different wavelength conversion layers and/or scattering layers arranged along the moving direction of a color wheel assembly to form light of different primary colors. The light-emitting device has high light efficiency and optical Due to the advantage of small expansion, it develops rapidly and becomes an ideal choice for light-emitting devices for single-chip, two-chip and three-chip projection systems.

In the existing single-chip projection system, a blue light laser is generally used to irradiate a color wheel assembly containing three segmented areas to sequentially emit blue light, green light and red light. The wheel assembly includes a segmented area provided with a blue light scattering layer, a segmented area provided with a green wavelength conversion layer and a segmented area provided with a red wavelength conversion layer distributed along the moving direction of the color wheel assembly.

In the existing two-chip projection system, a blue light laser is generally used to irradiate a color wheel assembly containing two segmented areas to sequentially emit blue light and yellow light, and the color wheel assembly containing two segmented areas includes The segmented area provided with the blue light scattering layer and the segmented area provided with the yellow light wavelength conversion layer are distributed along the moving direction of the color wheel assembly.

In the existing three-chip projection system, a blue light laser is generally used to irradiate a color wheel assembly with yellow wavelength conversion layers distributed along the moving direction of the color wheel assembly to generate a white light emitting device.

In the light-emitting device used in the above-mentioned single-chip, two-chip or three-chip projection system, due to the low light conversion efficiency of the wavelength conversion material contained in the wavelength conversion layer or other reasons, some of the light emitted by the light-emitting device may be The color coordinates and color gamut of some primary color lights, such as red light, green light or blue light, deviate from the required color coordinates and color gamut standards, such as DCI or REC.709 color gamut standards, resulting in reduced projected image quality.

Utility model content

In view of this, the utility model provides a light emitting device and a projection system to solve the problem that the color gamut achieved by the existing projection system deviates from the required standard color gamut.

In a first aspect, a light emitting device is provided, comprising:

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

The color wheel assembly includes at least one segmented area distributed along the moving direction of the color wheel assembly, and the color wheel assembly emits the compensation light under the illumination of the excitation light source and the compensation light source and includes at least one the first light of the laser;

Wherein the compensation light has spectral overlap with at least one subject light in the first light, and the compensation light is emitted during the emission period of the subject light that has spectrum overlap with the compensation light, and the compensation light and The compensated light and the subject light with overlapping spectrums can be adjusted independently of each other.

Preferably, the timing of the compensation light emitted by the compensation light source is the same as the timing of the stimulated light emitted by the color wheel assembly under the illumination of the excitation light source and having a spectral overlap with the compensation light.

Preferably, at least one segmented area in the at least one segmented area is provided with a wavelength conversion layer, and the wavelength conversion layer absorbs the excitation light and emits the stimulated light.

Preferably, the compensation light source is turned on when the excitation light source irradiates the segmented region of the color wheel assembly provided with a wavelength conversion layer that absorbs the excitation light and can emit the stimulated light that overlaps in spectrum with the compensation light. , turn off when the excitation light source irradiates the rest of the segmented area.

Preferably, at least one segmented area in the at least one segmented area that is not provided with a wavelength conversion layer is provided with a scattering layer, and the scattering layer scatters and emits the excitation light emitted by the excitation light source.

Preferably, the compensation light source is turned on when the excitation light source irradiates the segmented area of the color wheel assembly that is provided with a wavelength conversion layer that absorbs the excitation light and can emit the stimulated light and the segmented area with a scattering layer , turn off when the excitation light source irradiates the rest of the segmented area.

Preferably, the excitation light source is turned on in all segmented regions of the color wheel assembly, or,

The light source module also includes a third light source that emits a third light, the third light and the excitation light are metameric light, and the excitation light source is located on the part of the color wheel assembly that is provided with a wavelength conversion layer. The segmented area is turned on and turned off in the remaining segmented areas, the third light source is turned on in the segmented area where the scattering layer is provided in the color wheel assembly, and turned off in the remaining segmented areas.

Preferably, the compensation light source includes a red laser light source emitting red light and/or a cyan laser light source emitting cyan light, and the excitation light source is a blue laser light source emitting blue light.

Preferably, the dominant wavelength of the blue light emitted by the excitation light source is 445nm, the dominant wavelength of the blue-green light emitted by the cyan laser light source is any value between 510nm-530nm, including the endpoint value, and the red laser light emitted by the red laser light source The dominant wavelength of light is any value between 625nm-645nm, including the endpoint value.

Preferably, the dominant wavelength of the cyan light emitted by the cyan laser light source is 520nm, and the dominant wavelength of the red light emitted by the red laser light source is 638nm.

Preferably, the light emitting device further includes:

The control device is configured to control the ratio of the compensation light to the subject light having spectral overlap with the compensation light by controlling the output power of the compensation light source and the output power of the excitation light source.

Preferably, the control device also includes:

The brightness control unit is used to proportionally increase or decrease the brightness of the compensation light and the subject light whose spectrum overlaps with the compensation light.

Preferably, the control device also includes:

A PWM controller, the PWM controller is used to control the luminous intensity of the laser light emitted by the cyan laser light source and/or the red laser light source.

Preferably, the color wheel assembly emits sequential red light, green light and blue light under the illumination of the exciting light source;

The compensation light source includes cyan laser and/or red laser, the timing 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, and the timing of the red laser of the compensation light source is the same as that of the The timing of the red light emitted by the color wheel assembly is the same.

Preferably, the color wheel assembly includes a fluorescent wheel and a filter wheel that rotates synchronously with the fluorescent wheel, wherein:

The fluorescent wheel includes a green fluorescent area, a blue scattering area and a red fluorescent area;

The filter wheel includes a green filter area corresponding to the green fluorescent area, and a red filter area corresponding to the red fluorescent area.

Preferably, green fluorescent powder is provided on the surface of the green fluorescent area, scattering powder is provided on the surface of the blue scattering area, and red fluorescent powder is provided on the surface of the red fluorescent area.

Preferably, the green filter region is used to filter part of the short wavelength and part of the long wavelength light in the light emitted by the green fluorescent region, the range of the short wavelength is 460nm-490nm, including the endpoint value, the The range of long wavelength is 590nm-600nm, including the endpoint value;

The red filter area is used to filter part of long-wavelength light in the light emitted by the red fluorescent area, and the long-wavelength range is 590nm-600nm, including endpoint values.

Preferably, the color wheel assembly emits sequential blue light and yellow light under the excitation of the excitation light source;

The compensation light source includes cyan laser and/or red laser; the cyan laser of the compensation light source is turned on during the entire timing period of the color wheel assembly, and the timing of the red laser light of the compensation light source is consistent with the yellow light emitted by the color wheel assembly The timing is the same.

Preferably, the color wheel assembly is excited by the excitation light source to emit white light during the entire time sequence;

The compensation light source includes cyan laser and/or red laser, and both the excitation light source and the compensation light source included in the light source module are turned on during the entire time sequence.

Preferably, the excitation light source includes a first blue laser, and the color wheel assembly includes a full yellow wheel, and the full yellow wheel is excited by the first blue laser to emit yellow light and transmit part of the blue light of the first blue laser , the outgoing yellow light and the transmitted blue light form a white light exit.

Preferably, the excitation light source further includes a second blue laser, and the color wheel assembly further includes an all-blue wheel and a dichroic mirror,

The all-blue wheel scatters and decoheres the blue light emitted by the second blue laser;

The dichroic mirror is used to filter the blue light in the white light emitted by the all-yellow wheel, so that the yellow light emitted by the all-yellow wheel and the standard blue light emitted by the all-blue wheel form white light output.

Preferably, the blue laser emitted by the second blue laser has a dominant wavelength of 462nm.

In a second aspect, a projection system is provided, including the above light emitting device.

Preferably, the projection system also includes an imaging component, wherein:

The imaging assembly includes a TIR prism, a DMD chip, and a projection lens, and the TIR prism is used to guide the light emitted by the color wheel assembly into the DMD chip, and guide the imaging light emitted by the DMD chip into the projection lens. in the shot.

Preferably, the projection system further includes a spectroscopic device, and the spectroscopic device includes:

In the first optical path and the second optical path, when the yellow light of the color wheel assembly is in sequence, the light splitting device is used to divide the yellow light into green light and red light; wherein, the split green light and the compensation The cyan laser light of the light source is modulated through the first optical path, and the split red light and the red laser light of the compensation light source are modulated through the second optical path.

Preferably, during the time sequence when the color wheel assembly emits blue light, the blue light and the cyan laser are modulated through the first light path or the second light path.

Preferably, in the time sequence when the color wheel assembly emits blue light, the first light path is used to distribute the blue light, and the second light path is used to distribute the cyan laser light, through the first light path and the second light path Two optical paths, simultaneously modulating the blue light and the cyan laser.

Preferably, the light splitting device further includes: a third optical path, used for modulating the blue light and the cyan laser light during the time sequence when the color wheel assembly emits blue light.

Preferably, when the color wheel assembly is excited by the excitation light source to emit white light in the entire time sequence, the projection system further includes a light splitting device, and the light splitting device distributes the blue light in the white light to the first optical path for modulation Distributing the red light in the white light and the red laser light to a second optical path for modulation, and assigning the green light in the white light and the cyan laser light to a third optical path for modulation.

Preferably, when the light splitting device distributes the blue light in the white light to the first optical path for modulation, it also distributes the blue light in part of the yellow light to the first optical path for modulation simultaneously with the blue light.

Compared with the prior art, the technical solution provided by the utility model has the following advantages:

The utility model adds a compensation light source, and the compensation light emitted by the compensation light source overlaps with the light emitted by the color wheel assembly under the irradiation of the excitation light source, and the compensation light and the color wheel assembly emit under the irradiation of the excitation light source. The receiving light that overlaps with the compensation light emits at the same time and can be adjusted independently of each other. By combining the compensation light with the receiving light, the color coordinates of the primary color light corresponding to the receiving light can be adjusted, and then the light emitting device can be adjusted. The color gamut of the projection system.

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a light emitting device provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of segmented regions of the color wheel assembly provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of segmented areas of the color wheel assembly provided by another embodiment of the present invention;

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

Fig. 5 is a schematic structural diagram of a light emitting device provided by another embodiment of the present invention;

FIG. 6 is a schematic structural view of a single-chip DMD projection system provided by an embodiment of the present invention;

FIG. 7 is a color gamut diagram of the projection system shown in FIG. 6 provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a two-chip DMD projection system provided by an embodiment of the present invention;

FIG. 9 is a timing diagram of the first DMD chip 108a and a timing diagram of the second DMD chip 108b when the low-pass light-splitting film is used according to the embodiment of the present invention;

FIG. 10 is a color gamut diagram of the projection system shown in FIG. 8 provided by an embodiment of the present invention;

FIG. 11 is a timing diagram of the first DMD chip 108a and a timing diagram of the second DMD chip 108b when a bandpass spectroscopic film is used in the embodiment of the present invention;

Fig. 12 is an image signal connection diagram of the first DMD chip 108a and the second DMD chip 108b when a bandpass spectroscopic film is used in the embodiment of the present invention;

Fig. 13 is a schematic structural diagram of a three-chip DMD projection system provided by an embodiment of the present invention;

Fig. 14 is a schematic structural diagram of a three-piece DMD projection system provided by another embodiment of the present invention;

Figure 15 is an example diagram of the segmented area distribution of the all-blue wheel provided by the embodiment of the present invention;

FIG. 16 is a color gamut diagram of the projection system shown in FIG. 13 provided by an embodiment of the present invention;

FIG. 17 is a color gamut diagram of the projection system shown in FIG. 14 provided by an embodiment of the present invention.

Detailed ways

The utility model provides a light emitting device, comprising:

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

The color wheel assembly includes at least one segmented area distributed along the moving direction of the color wheel assembly, and the color wheel assembly emits the compensation light under the illumination of the excitation light source and the compensation light source and includes at least one the first light of the laser;

Wherein the compensation light has a spectrum overlap with at least one subject light in the first light, the compensation light and the subject light having a spectrum overlap with the compensation light are emitted simultaneously, and the compensation light and the compensation light Stimulated light sources with spectral overlap can be tuned independently of each other.

The utility model also provides a projection system comprising the above light emitting device.

The above is the core idea of the utility model. In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways that are different from those described here, and those skilled in the art can do so without violating the connotation of the utility model. Under the circumstances, similar applications are made, so the utility model is not limited by the specific embodiments disclosed below.

Secondly, the utility model is described in detail in combination with schematic diagrams. When describing the embodiments of the utility model in detail, for the convenience of explanation, the cross-sectional view showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it will not be described here. The protection scope of the utility model should be limited. 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 light emitting device. As shown in FIG. 1 , the light emitting device 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 light emitting device further includes a color wheel assembly 102 located in the transmission light path of the excitation light emitted by the excitation light source 111 and the compensation light emitted by the compensation light source 112 . The color wheel assembly 102 emits compensation light and first light including at least one stimulated light under the irradiation of the excitation light emitted by the excitation light source 111 and the compensation light emitted by the compensation light source 112 . Wherein the compensation light has a spectrum overlap with at least one subject light in the first light, and the compensation light and the subject light having a spectrum overlap with the compensation light are emitted simultaneously, and the compensation light and the subject light having a spectrum overlap with the compensation light can be adjusted independently of each other .

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, at least one segmented area is provided with a wavelength converting layer including a wavelength converting material, and the other segmented area is 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, the wavelength conversion layer provided in at least one segmented area of the color wheel assembly 102 can absorb the excitation light emitted by the excitation light source 111 and emit the stimulated light with spectral overlap 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 realization of simultaneous emission of the compensation light and the subject light with a spectral overlap with the compensation light can be as follows: the timing of the compensation light emitted by the compensation light source and the compensation light emitted by the color wheel assembly under the illumination of the excitation light source The timing of the beams subject to overlapping spectra is the same. Specifically, the compensation light source 112 is turned on in the segmented area of the color wheel assembly 102 provided with a wavelength conversion layer that absorbs the excitation light and emits the stimulated light that overlaps in spectrum with the compensation light, and is turned off in the remaining segmented areas. Examples are as follows:

Assuming that the compensation light is red light, the timing of the red light emitted by the compensation light source 112 is the same as that of the red light emitted by the color wheel assembly 102 under the irradiation of the excitation light emitted by the excitation light source. Specifically, when the segmented region of the color wheel assembly 102 provided with the wavelength conversion layer that absorbs the excitation light emitted by the excitation light source 111 and emits red light is located in the output light path of the excitation light source and the compensation light source, the excitation light source 111 and the compensation light source can be turned on at the same time. The compensation light source 112 is turned off in the rest of the subsection areas. In this way, the timing of the red light emitted by the compensation light source 112 can be made the same as the timing of the red light emitted by the color wheel assembly 102 under the illumination of the exciting light source 111 .

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 utility model, the light source module further includes a third light source (not shown) 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. Heterogeneous 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 metameric light refers to the light that presents the same color but has different spectrums.

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 2 to 4, which are example diagrams of the distribution of each segmented area on the color wheel assembly 102 provided by the embodiment of the present utility model, but the distribution of each segmented area on the color wheel assembly 102 is not as shown in Figures 2 to 4 shown as a limit.

In Fig. 2, the color wheel assembly 102 is disc-shaped, and the color wheel assembly 102 includes segmented regions (called blue scattering regions) 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 Green laser light source, so that the segmented area provided with the red wavelength conversion layer of the color wheel assembly 102 simultaneously emits the red receiving laser and the red laser, and the segmented area provided with the green wavelength conversion layer simultaneously emits the green receiving laser and the cyan laser , the segmented area provided with the scattering layer emits blue light, or simultaneously emits blue light and cyan laser light.

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, so that The segmented area with the red wavelength conversion layer emits the red receiving laser and the red laser at the same time, the segmented area with the green wavelength conversion layer emits the green receiving laser and the green laser at the same time, and the segmented area with the scattering layer emits the second Three lights, or the segmented area provided with the scattering layer emits the third light and the cyan laser at the same time, and the third light is blue light.

In FIG. 3 , the color wheel assembly 102 is disc-shaped, and the color wheel assembly 102 includes segmented areas (also referred to as yellow fluorescent areas) 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, so that the yellow wavelength conversion layer of the color wheel assembly 102 is provided The segmented area simultaneously emits yellow light and red light, or simultaneously emits yellow light and cyan light, or simultaneously emits yellow light, red light and cyan light, and the segmented area provided with a scattering layer emits blue light, or simultaneously emits blue light and cyan light.

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 and red light are emitted, or yellow light and cyan light are emitted simultaneously, or yellow light, red light and cyan light are emitted simultaneously, and the segmented area provided with a scattering layer emits blue light, or blue light and cyan light are emitted simultaneously.

In FIG. 4 , 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. .

If the light source module includes an excitation light source 111 and a compensation light source 112, the excitation light source 111, and the red laser light source and/or the cyan laser light source are turned on during the entire movement cycle of the color wheel assembly 102, so that the color wheel assembly 102 emits yellow light at the same time , blue light and red light, or yellow light, blue light and cyan light, or yellow light, blue light, red light and cyan light.

If the light source module includes an excitation light source 111, a compensation light source 112 and a third light source, then the excitation light source 111, the third light source, and the red laser light source and/or the cyan laser light source are turned on during the entire movement cycle of the color wheel assembly 102, so that The color wheel assembly 102 simultaneously emits yellow light, third light (which is blue light) and red light, or yellow light, third light (which is blue light) and cyan light, or yellow light, third light (which is blue light), Red and turquoise light.

Embodiment two

Fig. 5 shows the structure of a light emitting device provided by another embodiment of the present invention. The difference between the lighting device and the lighting device described in the first embodiment is that it further includes a control device 14 . The other parts are the same as the first embodiment, therefore, the parts not described in detail in this embodiment refer to the first embodiment above.

The control device 14 controls the excitation light source 111 and the compensation light source 112 . The control device 14 controls the ratio of the compensating light and the receiving light having spectral overlap with the compensating light by controlling the output power of the compensating light source 112 and the output power of the exciting light source 111 . Controlling the ratio of the output power of the compensation light source 112 to the output power of the excitation light source 111 may be controlling the ratio of the light intensity of the compensation light source 112 to the light intensity of the excitation light source 111 . For example, the light intensity change can be realized by increasing or decreasing the current of the compensation light source 112 or the excitation light source 111 . Since the compensation light source 112 and the excitation light source 111 can be adjusted independently, the control device 14 can control the proportion of the compensation light and the treated light with spectral overlap with the compensation light to any ratio.

Preferably, the control device 14 further includes a PWM controller (not shown in the figure), and the PWM controller is used to control the luminous intensity of the laser emitted by the cyan laser light source and/or the red laser light source. In this embodiment, when controlling the luminous intensity of the laser light emitted by the cyan laser light source and/or the red laser light source, the cyan laser light source and/or the red laser light source can be controlled to emit laser light with different luminous intensities at different time periods, for example, When the cyan laser light source is turned on in the segmented area where the green wavelength conversion layer and the scattering layer are provided in the color wheel assembly, the output of the cyan laser light source in the segmented area where the green wavelength conversion layer is provided with the color wheel assembly can be controlled. The luminous intensity of the laser light is different from the luminous intensity of the laser light emitted in the segmented area provided with the scattering layer.

Preferably, the control device 14 further includes a brightness control unit (not shown in the figure), which is used to proportionally increase or decrease the brightness of the compensation light and the subject light having spectral overlap with the compensation light. A specific implementation manner of increasing or decreasing the brightness in equal proportions may be increasing or decreasing the currents of the compensation light source 112 and the excitation light source 111 in equal proportions.

Embodiment three

Please refer to FIG. 6 . FIG. 6 is a schematic structural diagram of a single-chip DMD projection system, which includes a light emitting device 100 and an imaging component 200 . Wherein the light emitting device 100 is any one of the first embodiment or the second embodiment above, preferably, the color wheel assembly in the light emitting device 100 is the color wheel assembly shown in FIG. 2 . A brief description is as follows, and for parts not described in detail, refer to the first or second embodiment above.

The light emitting device 100 includes a light source module 101, which is usually 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.

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

In an embodiment, the DCI standard color gamut is preferably used as the compensation standard. 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 or equal to the standard color gamut of the corresponding color light in the DCI standard color gamut. are similar to reduce the difference between the color gamut of the outgoing light and the DCI standard color gamut, wherein the cyan laser 113 is used for color gamut compensation of the blue and green light in the RGB three primary colors, and the red laser 111 is used for Performing color gamut compensation on the red light in the RGB three-primary color light can make the DCI color coordinates of the compensated green light be (0.265±0.02, 0.69±0.02), and the compensated red light DCI color coordinates be (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).

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) 21, the segmented region provided with the green wavelength conversion layer (called the green fluorescent region) 22, and the segmented region provided with the red wavelength conversion layer (called the red fluorescent area) 23, the filter wheel 122 includes a green filter area set corresponding to the green fluorescent area 22, and a red filter area set corresponding to the red fluorescent area 23, 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 the present embodiment, the blue laser passes through the rotating fluorescent wheel 121 to generate time-sequenced RGB three-primary color light, and the emitted blue light is light with a narrow band spectrum, which is different from the blue light. 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.

Since the red light, green light, and blue light emitted by the color wheel assembly 102 are sequential, one DMD can be used to modulate the three kinds of light sequentially. Therefore, in this embodiment, it is preferred to adopt an imaging assembly with a monolithic DMD: comprising a TIR prism 106, a DMD chip 105 and a projection lens 107, the TIR prism 106 is used to reflect the light emitted by the color wheel assembly 102 onto the DMD chip 105, And reflect the imaging light emitted by the DMD chip 105 into the projection lens 107 . The imaging assembly with a single-chip DMD is used for modulating each primary color light emitted by the color wheel assembly 102 to form a color image. In other embodiments, an imaging assembly of three DMDs can also be used, and one DMD independently modulates a kind of light in RGB; an imaging assembly of two DMDs can also be used, wherein one DMD modulates a kind of light in RGB, and the other A DMD modulates the other two lights in RGB.

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 22 to generate the mixed light of the green light and the cyan laser, which is filtered by the green filter; when the color wheel assembly 102 is in the red During the time sequence, the red laser is turned on, and the red laser passes through the red fluorescent region 23 to generate mixed light of red light and red laser, which is filtered by the red filter. After filtering, the emitted light is homogenized by the square rod 103 , then incident on the TIR prism 106 through the optical relay system 104 , reflected to the DMD chip 105 for modulation, and finally outputs an image through the projection lens 107 .

In this embodiment, the difference between the compensated system color gamut and the target standard color gamut can be within a set threshold range. Taking the standard DCI color gamut as the target standard color gamut, the color coordinates of the three color lights of the target standard color gamut are: green light (0.265, 0.69), red light (0.68, 0.32), and blue light (0.15, 0.06).

As shown in FIG. 7 , FIG. 7 is a color gamut diagram of a projection system provided by an embodiment of the present invention. The mixing of blue light and cyan laser can change the original blue light color coordinates. The mixed blue light color coordinates are (0.15±0.01, 0.06±0.01), which is close to the blue light DCI standard color coordinates (0.15, 0.06); the green light and cyan laser mixing can change the original color coordinates. Green light color coordinates, along the boundary of its color coordinate distribution area, draw it closer to the intersection with the side length of the DCI color gamut triangle, forming a distance from the upper vertex of the laser+phosphor color gamut triangle to the upper vertex of the DCI color gamut triangle The line segment is near the standard color coordinates (0.265, 0.69) of the green light DIC; the red light and the red laser are mixed, and the red light color coordinates are (0.68±0.02, 0.32±0.02) after mixing, which achieves a straight line The effect of zooming in on the red light color coordinates to the red light DCI standard color coordinates (0.68, 0.32).

The utility model performs color gamut compensation on the RGB three-primary color light emitted by the color wheel assembly 102 by adding a cyan laser 113 and/or a red laser 111. The cyan laser is used to compensate the blue light color coordinates and the green light color coordinates, and the red laser light It is used to compensate the red light color coordinates, and the original color coordinates are compensated near the DCI standard color coordinates, so that the color gamut of each projector is compensated to the DCI standard, and the color gamut is basically the same. Due to the increase of light input, The color gamut range has been improved to increase the brightness of color images.

The light-emitting device further includes a PWM controller (pulse width modulation controller), and the PWM controller performs automatic sequential regulation of the luminous intensity of the emitted light of the cyan laser 113 and/or the red laser 111 through a pulse width modulation control method.

In the embodiment of the present application, by setting the compensation light source to compensate light of a corresponding color, the color gamut of the system can be adjusted. As mentioned above, the DCI standard color gamut can be used as a compensation standard to adjust the color gamut of the projection system.

From the above description, it can be known that the projection system according to the embodiment of the present application emits red light, green light and blue light in time sequence from the color wheel assembly. By setting the timing of the compensation light source, the timing of the cyan laser of the compensation light source is the same as the timing of the blue light and green light emitted by the color wheel assembly, and the timing of the red laser light of the compensation light source is the same as the timing of the red laser emitted by the color wheel assembly. Light timing is the same. Therefore, the blue light and green light can be compensated by the cyan laser, and the red light can be compensated by the red laser, so as to adjust the color gamut of the projection system to a set range.

Embodiment four

Please refer to FIG. 8 , which is a schematic structural diagram of a two-chip DMD projection system. The projection system includes a light emitting device 100 and a light splitting device 300 with two DMD chips.

The light emitting device 100 includes a light source module 101 and a color wheel assembly 102 , the light source module 101 includes an excitation light source 1111 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 regions on the fluorescent wheel is as shown in the above-mentioned 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 1111, 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. A spectroscopic device with two DMDs is used to split the blue light and yellow light emitted by the color wheel assembly 102 to form RGB three primary color lights, and distribute and modulate the RGB three primary color lights to form a color image.

In this implementation, the DCI standard color gamut may be used as a compensation standard. At this time, the compensation light source is used to reduce the difference between the color gamut of the outgoing light and the DCI standard color gamut, and the compensation light source includes a cyan laser and/or a red laser.

In this embodiment, the cyan laser 112 of the compensation light source is generated by a cyan laser, the red laser 113 of the compensation light source is generated by a red laser, and the excitation light source 1111 is a blue 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 blue-green laser is any value between 510nm-530nm, including the endpoint value, and the red laser emitted by the red laser The dominant wavelength range is any value between 625nm-645nm, including the endpoint value. 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 time sequence 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 red laser of the compensation light source The timing of 113 is the same as the timing of the yellow light emitted by the color wheel assembly 102 , that is, the red laser is turned on only when the color wheel assembly 102 emits yellow light.

In this embodiment, the compensation light source includes a cyan laser and/or a red laser, the blue laser emitted by the excitation light source is preferably 445 nm in dominant wavelength, the cyan laser emitted by the cyan laser is preferably 520 nm in dominant wavelength, and the red laser emitted by the red laser is preferably 520 nm. The dominant wavelength of the laser light is preferably 638 nm. In the yellow time period and the blue time period, the cyan laser and the excitation light source 1111 are turned on for color gamut compensation of the blue light and the green light in the RGB three primary color lights of the spectroscopic device. In the yellow time period, the red laser is turned on to perform color gamut compensation for the red light in the RGB three primary colors. By setting the color gamuts of the red laser and the cyan laser, the compensated red, green and blue color gamuts can be within the set range.

In this embodiment, the difference between the compensated system color gamut and the target standard color gamut can be within a set threshold range. Taking the standard DCI color gamut as the target standard color gamut, the color coordinates of the three color lights of the target standard color gamut are: green light (0.265, 0.69), red light (0.68, 0.32), and blue light (0.15, 0.06). 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 (0.15 ±0.01, 0.06±0.01). The light emitted by the light emitting device 100 is collected by the collecting lens 101 and then incident on the color wheel assembly 102. The yellow light and blue light emitted by the color wheel assembly 102 in sequence, the light emitted by the color wheel assembly 102 enters the square rod 103 for uniform light, and then After passing through the optical relay system 104 and the TIR prism 105, it enters the light-splitting and combining prism 106. The light-splitting and combining prism 106 splits light to form the RGB three-primary color light, and distributes the RGB three-primary color light to different DMD chips for modulation. After the light is combined, a color image is formed through the projection lens.

Further, the light emitting device 100 further includes a PWM controller (Pulse Width Modulation Controller), and the PWM controller is used to control the luminous intensity of the emitted light of the cyan laser and/or the red laser. The PWM controller uses the pulse width modulation control method to sequentially adjust the luminous intensity of the output light of the cyan laser and/or the red laser. Since the intensity of the required cyan laser may be different when compensating the blue light and the green light, therefore It is necessary to calculate the intensity of the required cyan laser and red laser according to the existing green and red color coordinates and the DCI standard color coordinates. Therefore, the intensity of the cyan laser and red laser needs to be adjusted in sequence, and the color wheel also needs to be adjusted. The segments of the assembly 102 are regulated.

The light-splitting device 300 with double-chip DMD chips includes a light-splitting and light-combining prism 106, a TIR prism 105, a first DMD chip 108a, a second DMD chip 108b, and a projection lens 109, and the TIR prism 105 is used to emit yellow light from the color wheel assembly 102 and blue light are reflected on the light-splitting and combining prism 106, and the light-splitting and combining prism 106 is used for splitting the yellow light and the blue light emitted by the color wheel assembly 102 to form RGB trichromatic light, and distribute it to the first DMD chip 108a and the second DMD chip 108a. Modulation is performed on the DMD chip 108b, and the modulated RGB three primary colors are combined and reflected to the projection lens 109. The light splitting and combining prism 106 specifically includes: a first prism 107a and a second prism 107b, and the first A dichroic film 110 is provided between the prism 107a and the second prism 107b.

Wherein, the light-splitting film 110 between the first prism 107a and the second prism 107b in the light-splitting light-combining prism 106 carries out light-splitting, and when the light-splitting film 110 is a low-pass light-splitting film, the light distributed to the first DMD chip 108a is described The blue light and the green light in the RGB three primary colors, the light distributed to the second DMD chip 108b is the red light in the RGB three primary colors.

Since the blue light and the yellow light emitted by the color wheel assembly 102 have different time sequences, the blue light can be modulated by the light path of red light or green light. Therefore, during the time sequence when the color wheel assembly 102 emits blue light, the blue light and the cyan laser light can be modulated through the first optical path. Or during the time sequence when the color wheel assembly emits blue light, the blue light and the cyan laser are modulated through the second optical path.

When the blue light and the cyan laser light are modulated through the first optical path during the time sequence when the color wheel assembly 102 emits blue light, the timing diagram of the first DMD chip 108a and the timing diagram of the second DMD chip 108b are as follows Figure 9 shows. Since the function of the low-pass spectroscopic film is to transmit short-wavelength light and reflect long-wavelength light, when the yellow light and blue light B of different timings emitted by the color wheel assembly 102 are incident on the low-pass spectroscopic film, the low-pass spectroscopic film transmits blue light and yellow light. The green light G and the cyan laser C are sent to the first DMD chip 108a, and the red light R and the red laser R' in the yellow light are reflected to the second DMD chip 108b. The cyan laser C and the blue light B are mixed to change the color coordinates of the original blue light. , to bring it closer to the blue light DCI standard color coordinates (0.15, 0.06); since the green light is separated from the yellow light, the long-wavelength part of the green light is filtered out. There is a difference in the process of wavelength, which will make the color coordinates of green light move approximately straight along the edge of the green color gamut. The mixture of cyan laser C and green light G can change the original color coordinates of green light and move it along the The above straight line is shortened to the vicinity of the DCI standard color coordinates of green light (0.265, 0.69); similarly, since the red light R is separated from the light, the short-wavelength part of the red light is filtered out. There is a difference in the process of filtering out short wavelengths of red light. This difference will cause the red light color coordinates to move approximately in a straight line along the edge of the red light color gamut. The red light R and the red laser R' are mixed to change the original red light color. The coordinates are drawn along the above straight line to the vicinity of the DCI standard color coordinates (0.68, 0.32) of red light, and its color gamut diagram is shown in Figure 10.

It should be pointed out that, in this embodiment, this method can be applied to a double-chip LCOS (Liquid Crystal On Silicon, liquid crystal display on silicon) projection system, and the blue light is distributed to two LCOSs according to the polarization state, which can make the two The energy on LCOS is more balanced, which is good for heat dissipation.

In other implementation manners, it can also be set in the timing segment when the color wheel assembly 102 emits blue light, the first light path is used to distribute the blue light, the second light path is used to distribute the cyan laser, through the The first optical path and the second optical path modulate the blue light and the cyan laser at the same time; or during the time sequence when the color wheel assembly 102 emits blue light, the second optical path is used to distribute the blue light, so The first light path is used for distributing the cyan laser light, and simultaneously modulates the blue light and the cyan laser light through the first light path and the second light path.

When the light-splitting film 110 is a band-pass light-splitting film, the first DMD timing diagram and the second DMD timing diagram are shown in Figure 11, and the light distributed to the first DMD chip 108a is blue light B and red light in the RGB three primary colors R, the light distributed to the second DMD chip 108b is green light G in the RGB three primary colors. In this embodiment, the role of the band-pass spectroscopic film is to transmit the required light and reflect unnecessary light. When the yellow light and blue light B emitted by the color wheel assembly 102 enter the band-pass spectroscopic film, the blue light B and yellow The red light R and the red laser R' that are separated from the light are sent to the first DMD chip 108a, and the green light G that is reflected from the blue-green laser C and the yellow light is sent to the second DMD chip 108b, and the blue-green laser C and blue light B are supplemented by the blue light. Assigned to different DMD chips.

Because the energy of cyan laser C and blue light B is relatively large, distributing them to different DMD chips is beneficial to the heat dissipation of each DMD chip. The timing of each DMD chip processing light is carried out in the way of a single-chip DMD. , as shown in Figure 12, it is necessary to connect the blue light signal input end of the first DMD chip 108a and the blue light signal input end of the second DMD chip 108b together, and use the PWM controller to modulate the intensity of the blue-green laser light to realize blue light Compensation of color coordinates, red light and red laser mixing can change the original red light color coordinates, compensated to the vicinity of the red DCI standard color coordinates, cyan laser and green light mixing can change the original green light color coordinates, compensated to the green DCI standard color coordinates The difference between the color gamut of the three primary colors and the DCI standard color gamut is reduced.

The above-mentioned projection system is described by taking two beam-splitting optical paths as an example. In other implementation manners, the beam-splitting device may also include a third optical path. During the timing period when the color wheel assembly emits blue light, the third light path is used to modulate the blue light and the cyan laser. The third optical path has a third DMD chip.

Embodiment five

FIG. 13 is a schematic structural diagram of a three-chip DMD projection system. The projection system includes a light emitting device 100 and a spectroscopic device 400 . The spectroscopic device 400 is different from the spectroscopic device 300 in the fourth embodiment above, and the details are as follows: the spectroscopic device 400 includes a first optical path with a first DMD chip 110a, a second optical path with a second DMD chip 110b, and a third optical path with a third DMD chip 110b. The third optical path of the DMD chip 110c.

The light emitting device 100 includes a light source module 101 and a color wheel assembly 102 . The light source module 101 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 laser 111 . The cyan laser of the compensating light source is generated by the cyan laser 112 , and the red laser of the compensating light source is generated by the red laser 113 .

The color wheel assembly 102 is excited by the excitation light source to emit white light W during the whole time sequence. The color wheel assembly 102 includes an all yellow wheel 123 . The all-yellow wheel 123 is excited by the first blue laser 111 to emit yellow light and transmit part of the blue light of the first blue laser, and the emitted yellow light and the transmitted blue light form white light W to emit.

The spectroscopic device 400 distributes the blue light in the white light W to the first optical path for modulation. At this time, since the blue light distributed to the first optical path is part of the blue laser light projected by the all-yellow wheel 123, it is the blue light after exciting the yellow phosphor powder. Afterglow, the color gamut range is uncertain, at this time, part of the blue light in the yellow light can be allocated to the first optical path and modulated with the blue light at the same time, and the blue light and the blue light can be combined by the first DMD chip 110a The blue light is modulated at the same time, the blue light is used to compensate the blue light, and the color gamut of the blue light is adjusted.

The spectroscopic device 400 distributes the red light in the white light W and the red laser light to the second optical path for modulation, and modulates the red light and the red laser light at the same time through the second DMD chip 110b. The red laser compensates the red light, and adjusts the color gamut of the red light.

The spectroscopic device 400 distributes the green light of the white light W and the cyan laser light to a third optical path for modulation, the green light and the cyan laser light are simultaneously modulated by the third DMD chip 110c, and the green light and the cyan laser light are modulated by The cyan laser compensates the green light and adjusts the color gamut of the green light.

It can be known from the above description that the projection system, through the spectroscopic device, can use the compensation light source to compensate the corresponding split light of the three primary color lights after split, so as to adjust the color gamut range of the projection system.

In this embodiment, the compensation light source includes a cyan laser 112 and/or a red laser 113 , the cyan laser 112 is used for color gamut compensation of green light, and the red laser 113 is used for color gamut compensation of red light. Preferably, the wavelength of the blue laser emitted by the first blue laser 111 is 445nm, the wavelength range of the green laser emitted by the cyan laser 112 is 510nm-530nm, including the endpoint value, and the wavelength range of the red laser emitted by the red laser 113 is 625nm-645nm, inclusive of endpoint values.

The difference between the compensated system color gamut and the target standard color gamut can be within a set threshold range. Taking the standard DCI color gamut as the target standard color gamut, the color coordinates of the three color lights of the target standard color gamut are: green light (0.265, 0.69), red light (0.68, 0.32), and blue light (0.15, 0.06). In this embodiment, the DCI standard color gamut may be used as a standard for color gamut adjustment, so that red light, green light, and blue light after compensation are the same as or similar to the color gamuts of corresponding color lights in the DCI standard color gamut. 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). The all-yellow wheel 123, as shown in FIG. 4 , includes a yellow light wavelength conversion layer along the circumferential direction of the all-yellow wheel 123. The yellow light wavelength conversion layer includes yellow phosphor powder, which is used to compensate the light source and the first blue laser. The light emitted by 111 is white light, and the role of the phosphor is to convert short-wavelength light into long-wavelength light.

In this embodiment, the compensation light source includes a cyan laser 112 and/or a red laser 113, the dominant wavelength of the blue laser emitted by the first blue laser 111 is preferably 445nm, and the dominant wavelength of the cyan laser emitted by the cyan laser 112 is preferably 520nm, The dominant wavelength of the red laser emitted by the red laser 113 is preferably 638nm. During the whole time period, the first blue laser 111 , the cyan laser 112 and the red laser 113 are all turned on, for compensating the color gamut of the light of the corresponding color in the RGB three primary colors.

The light emitted by the light source module 101 is converged by the first collecting lens 104 and then incident on the all-yellow wheel 123. The first blue laser 111 and the cyan laser 112 excite the yellow phosphor on the all-yellow wheel 123 to emit yellow light, which passes through Part of the blue laser light and yellow light from the all-yellow wheel 123 forms white light and is emitted from the all-yellow wheel 123 . After the optical relay system 107 is incident into the TIR prism 108 and the light-splitting and combining prism 109, the light-splitting and combining prism 109 splits light to form the RGB three-primary color light, and distributes the RGB three-primary color light to three different DMD chips for further processing. After modulation, the light is combined to form a color image through the projection lens 120 .

As shown in FIG. 14 , on the basis of the projection system provided in the above embodiments, the excitation light source further includes a second blue laser 114 , and the color wheel assembly 102 further includes an all-blue wheel 124 . The projection system also includes a mirror 204 and a dichroic mirror 205 . The full blue wheel 124 decoheres the scattered blue light emitted by the second blue laser 114 . The dichroic mirror 205 is used to filter the blue light in the white light emitted by the all-yellow wheel 123 , so that the yellow light emitted by the all-yellow wheel 123 and the standard blue light emitted by the all-blue wheel 124 form white light. At this time, since the blue light in the emitted white light W is the standard blue light emitted by the all-blue wheel 124, compensation is not required in the subsequent light splitting. Therefore, the spectroscopic device 400 only distributes the standard blue light emitted by the all-blue wheel 124 to the first optical path for further processing. modulation without cyan light compensation.

The dominant wavelength of the blue laser emitted by the second blue laser 114 is preferably 462nm. The all-blue wheel 124 is shown in FIG. 15 , and the all-blue wheel 124 is provided with a scattering layer along its circumferential direction. It is used to scatter the incident light and emit it. For example, the role of the scattering powder is to convert the polarized blue light into unpolarized blue light. Therefore, the second blue laser 114 emits blue light after passing through the full blue wheel 124 . The reflector 204 is used to reflect the blue light emitted by the all-blue wheel 203 to the dichroic mirror 205, and the dichroic mirror 205 is used to transmit green light and red light in the white light emitted by the all-yellow wheel 123, and reflect the all-blue light. The blue light emitted by the color wheel 124 forms white light W, so that the projected green light and red light and the reflected blue light enter the spectroscopic device 400 .

In this embodiment, during the entire timing stage, the first blue laser 111, the cyan laser 112, and the red laser 113 in the light emitting device 100 are all turned on, and at the same time, the second blue laser 114 is turned on, which is used for splitting the blue light , green light and red light for color gamut compensation. The light emitted by the light emitting device 100 is incident on the all-yellow wheel 123 after being converged by the first collecting lens 104, and the white light emitted after passing through the all-yellow wheel 123 is incident on the surface of the dichroic mirror 205, and the light emitted by the second blue laser 114 passes through the first After the two collection lenses 202 converge, they are incident on the all-blue wheel 124, and the blue light emitted after passing through the all-blue wheel 124 is incident on the surface of the reflector 204, and the reflector 204 reflects the blue light to the surface of the dichroic mirror 205, and the blue light and the dichroic The green light and red light transmitted by the color mirror 205 are mixed to form white light, and the white light enters the square rod 106 for uniform light, and then passes through the relay system 107 and the TIR prism 108 to enter the light-splitting and combining prism 109, and the light-splitting and combining prism 109 processes it. Split the light to form the RGB three primary color lights, and distribute the RGB three primary color lights to three different DMD chips for modulation, and form a color image through the projection lens 120 after combining the light.

Spectroscopic device 400 comprises: TIR prism 108, light splitting and combining prism 109, first DMD chip 110a, second DMD chip 110b, third DMD chip 110c and projection lens 120; The white light or the white light emitted by the dichroic mirror is reflected to the light splitting and combining prism 109, and the light splitting and combining prism 109 is used to split the white light to form RGB trichromatic light, and distribute it to the first DMD chip 110a, the second DMD Modulation is performed on the chip 110 b and the third DMD chip 110 c , and the modulated RGB three primary color lights are combined and reflected to the projection lens 120 . Wherein, the light-splitting and combining prism 109 specifically includes: a first prism, a second prism, and a third prism, a first light-splitting film is provided between the first prism and the second prism, and a second light-splitting film is provided between the second prism and the third prism, The first dichroic film is used to distribute the blue light in the RGB three primary colors to the first DMD chip 110a, and the second dichroic film is used to distribute the red light and the green light in the RGB three primary colors to the second DMD chip 110b and the second DMD chip 110b respectively. Three DMD chips 110c.

In the embodiment shown in FIG. 13 , during the entire time sequence, the first blue laser 111 , the cyan laser 112 and the red laser 113 are all turned on, and the white light emitted by the all-yellow The relay system 107 is incident on the TIR prism 108, after being reflected by the TIR prism 108, it reaches the surface of the first light-splitting film of the light-splitting and combining prism 109, and the blue light in the first light-splitting film reflects blue light and part of the yellow light to reach the first DMD chip 110a Modulate, transmit the yellow light to the surface of the second light splitting film, reflect the red light in the yellow light and the red laser light on the surface of the second light splitting film to reach the second DMD chip 110b, and transmit the cyan laser light and the green light in the yellow light to reach the third DMD chip 110c The light modulated by the DMD is combined at the first dichroic film and the second dichroic film, and then reaches the projection lens 120 to form a color image. Among them, the blue light mixed with the cyan light in the yellow light can change the original blue light color coordinates. Since the cyan light is intercepted from the yellow light, the long-wavelength part of the cyan light is filtered out, and the coating difference or separation of the first spectroscopic film of different projection systems The difference in the assembly of the photosynthetic light prism 109 leads to differences in the wavelength range of the blue light passing through the first spectroscopic film, so the blue light color coordinates obtained after mixing the blue light and the differentiated blue light have a small color gamut range, and this color gamut range It is near the DCI standard blue light color coordinates (0.15, 0.06); the mixture of cyan laser and green light in yellow light can change the original green light color coordinates, because green light is intercepted from yellow light, its short wavelength and long wavelength part are filtered out, and the coating of the second spectroscopic film is different, so that the color coordinates of the compensated green light are a small color gamut range (0.265±0.02, 0.69±0.02), which is in the DCI standard green Near the light color coordinates (0.265, 0.69); red light and red laser are mixed, and can pull the red light color coordinates to (0.68±0.02, 0.32±0.02) along a straight line, which is close to the DCI standard red light color coordinates (0.68, 0.32) , and its color gamut is shown in Figure 16.

In this embodiment, the color gamut is compensated by adding a compensation light source. The cyan light in the yellow fluorescence is used to compensate the blue light color coordinates, the 520nm cyan laser is used to compensate the green light color coordinates, and the 638nm red laser is used to compensate the red light color coordinates. In the compensation process of blue light color coordinates, since the proportion of blue light and yellow light that has not been converted into yellow light is constant, it is necessary to calculate the wavelength range of the required blue light according to the ratio of blue light to the blue light in the intercepted yellow light; for the red light color coordinates Compensation, 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 the embodiment shown in FIG. 14 , during the entire timing phase, the first blue laser 111, the cyan laser 112, and the red laser 113 in the light emitting device 100 are all turned on, and at the same moment, the second blue laser 114 is turned on for Color gamut compensation is performed on blue light, green light and red light in RGB three primary colors. The white light emitted from the dichroic mirror 205 enters the square rod 106 for homogenization, and then passes through the optical relay system 107 and the TIR prism 108 to enter the light splitting and combining prism 109, and the TIR prism 108 reflects the white light to the light splitting and combining prism 109 The surface of the first dichroic film, the first dichroic film reflects the blue light to the first DMD chip 110a for modulation, and transmits the yellow light to the surface of the second dichroic film, the second dichroic film reflects the red laser and the red light separated from the yellow light reaches Modulation is performed in the second DMD chip 110b, and the green light in the transmitted yellow light reaches the third DMD chip 110c for modulation, and the light modulated by the DMD is combined and emitted at the first dichroic film and the second dichroic film, and reaches the projection lens 120. Finally into a color image. Among them, the color coordinates of 462nm blue light as the blue light in the projection system are (0.15±0.01, 0.06±0.01) near the DCI standard blue light color coordinates (0.15, 0.06), so blue light does not need to be compensated; 520nm blue-green laser and yellow light are separated Green light is mixed, due to the difference in the process of filtering out the long wavelength of green light, the color coordinates of green light are a straight line along the edge of the green color gamut, and the color coordinates are (0.265±0.02 , 0.69±0.02), close to the DCI green light color coordinates (0.265, 0.69), the 638nm red light laser is mixed with the red light separated from the yellow light, the difference in the process of the red light being filtered out of its short wavelength makes the red light color coordinates It is a straight line along the edge of the red light color gamut. After compensation by the 638nm red laser, the color coordinates are (0.68±0.02, 0.32±0.02) close to the DCI standard red light color coordinates (0.68, 0.32). Therefore, blue light, green light and Red light color coordinates can be well compensated, and its color gamut is shown in Figure 17.

In FIG. 14 , two sets of excitation light sources, the first blue laser 111 and the second blue laser 114, are used. The 462nm blue laser in the second blue laser 114 is used as the blue light color coordinates of the projection system to meet the color gamut standard. The light emitting device 100 445nm blue laser is used to excite yellow phosphor to generate yellow light to separate green light and red light, 520nm cyan-green laser is used to compensate green light, and 638nm red laser is used to compensate red light, all of which can be compensated to a DCI standard color near the domain.

It can be seen from the above description that the projection system according to the embodiment of the present application can adjust the color gamut range through the compensation light source, so that the color gamut range of the projection system can be set. As described above, the standard DCI color gamut may be used as a compensation standard, so that the color gamut range of the projection system is the same as or similar to the standard DCI color gamut.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the scope of patents of the present utility model. Any equivalent structure made using the description of the utility model and the contents of the accompanying drawings or directly or indirectly used in other related technical fields, All are deemed to be included in the patent protection scope of the present utility model.

Claims (30)

1. A lighting device, characterized in that, comprising: A light source module, including an excitation light source emitting excitation light and a compensation light source emitting compensation light; The color wheel assembly includes at least one segmented area distributed along the moving direction of the color wheel assembly, and the color wheel assembly emits the compensation light under the illumination of the excitation light source and the compensation light source and includes at least one the first light of the laser; Wherein the compensation light has spectral overlap with at least one subject light in the first light, and the compensation light is emitted within the 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 are emitted. The compensated light and the subject light whose spectrum overlaps with the compensation light are emitted simultaneously, and the compensation light and the subject light having a spectrum overlap with the compensation light can be adjusted independently of each other. 2. The light emitting device according to claim 1, wherein the timing of the compensation light emitted by the compensation light source and the compensation light emitted by the color wheel assembly under the illumination of the excitation light source exist The timing of the beams whose spectra overlap is the same. 3. The light-emitting device according to claim 2, wherein at least one segmented area in the at least one segmented area is provided with a wavelength conversion layer, and the wavelength conversion layer absorbs the excitation light and emits the received light . 4. The light-emitting device according to claim 3, wherein the compensation light source has spectral overlap with the compensation light when the excitation light source irradiates the color wheel assembly without absorbing the excitation light. When the segmented area of the wavelength conversion layer subject to the laser light is turned on, it is turned off when the excitation light source irradiates the remaining segmented area. 5. The light-emitting device according to claim 3, wherein at least one segmented area in the at least one segmented area that is not provided with a wavelength conversion layer is provided with a scattering layer, and the scattering layer has an effect on the excitation The excitation light emitted from the light source is scattered and emitted. 6. The light emitting device according to claim 5, characterized in that, when the excitation light source is irradiated to the color wheel assembly, the compensation light source is provided with a wavelength conversion layer that absorbs the excitation light and can emit the received light. It is turned on when the segment area and the segment area provided with the scattering layer are turned on, and is turned off when the excitation light source irradiates the remaining segment area. 7. The lighting device of claim 6, wherein the excitation light source is turned on in all segmented regions of the color wheel assembly, or, The light source module also includes a third light source that emits a third light, the third light and the excitation light are metameric light, and the excitation light source is located on the part of the color wheel assembly that is provided with a wavelength conversion layer. The segmented area is turned on and turned off in the remaining segmented areas, the third light source is turned on in the segmented area where the scattering layer is provided in the color wheel assembly, and turned off in the remaining segmented areas. 8. The light emitting device according to any one of claims 1 to 7, wherein the compensation light source comprises a red laser light source emitting red light and/or a cyan laser light source emitting cyan light, and the excitation light source is Blu-ray blue laser light source. 9. The light-emitting device according to claim 8, wherein the dominant wavelength of the blue light emitted by the excitation light source is 445nm, and the dominant wavelength of the blue-green light emitted by the blue-green laser light source is any value between 510nm-530nm , including the endpoint value, the dominant wavelength of the red light emitted by the red laser light source is any value between 625nm-645nm, including the endpoint value. 10 . The light emitting device according to claim 9 , wherein the dominant wavelength of the cyan light emitted by the cyan laser light source is 520 nm, and the red light emitted by the red laser light source has a dominant wavelength of 638 nm. 11 . 11. The lighting device according to claim 8, further comprising: The control device is configured to control the ratio of the compensation light to the subject light having spectral overlap with the compensation light by controlling the output power of the compensation light source and the output power of the excitation light source. 12. The lighting device according to claim 11, wherein the control device further comprises: The brightness control unit is used to proportionally increase or decrease the brightness of the compensation light and the subject light whose spectrum overlaps with the compensation light. 13. The lighting device according to claim 11, wherein the control device further comprises: A PWM controller, the PWM controller is used to control the luminous intensity of the laser light emitted by the cyan laser light source and/or the red laser light source. 14. The light-emitting device according to claim 1, wherein the color wheel assembly emits sequential red light, green light and blue light under the illumination of the exciting light source; The compensation light source includes cyan laser and/or red laser, the timing 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, and the timing of the red laser of the compensation light source is the same as that of the The timing of the red light emitted by the color wheel assembly is the same. 15. The light emitting device according to claim 14, wherein the color wheel assembly comprises a fluorescent wheel and a filter wheel that rotates synchronously with the fluorescent wheel, wherein: The fluorescent wheel includes a green fluorescent area, a blue scattering area and a red fluorescent area; The filter wheel includes a green filter area corresponding to the green fluorescent area, and a red filter area corresponding to the red fluorescent area. 16. The light-emitting device according to claim 15, wherein green fluorescent powder is provided on the surface of the green fluorescent area, scattering powder is provided on the surface of the blue scattering area, and red fluorescent powder is provided on the surface of the red fluorescent area. pink. 17. The lighting device of claim 15, wherein The green filter area is used to filter out part of the short wavelength and part of the long wavelength light in the light emitted by the green fluorescent area, the range of the short wavelength is 460nm-490nm, including the endpoint value, and the long wavelength The range is 590nm-600nm, including the endpoint value; The red filter area is used to filter part of long-wavelength light in the light emitted by the red fluorescent area, and the long-wavelength range is 590nm-600nm, including endpoint values. 18. The lighting device of claim 1, wherein: The color wheel assembly emits sequential blue light and yellow light under the excitation of the exciting light source; The compensation light source includes cyan laser and/or red laser; the cyan laser of the compensation light source is turned on during the entire timing segment of the color wheel assembly, and the timing of the red laser light of the compensation light source is consistent with the yellow laser emitted by the color wheel assembly. Light timing is the same. 19. The light emitting device according to claim 1, wherein the color wheel assembly is excited by the excitation light source to emit white light during the entire time sequence; The compensation light source includes cyan laser and/or red laser, and both the excitation light source and the compensation light source included in the light source module are turned on during the entire time sequence. 20. The light emitting device according to claim 19, wherein the excitation light source comprises a first blue laser, and the color wheel assembly comprises a full yellow wheel, and the full yellow wheel is excited by the first blue laser to emit The yellow light and the blue light of the first blue laser are transmitted, and the emitted yellow light and the transmitted blue light form white light to be emitted. 21. The light emitting device according to claim 20, wherein the excitation light source further comprises a second blue laser, and the color wheel assembly further comprises a full blue wheel and a dichroic mirror, The all-blue wheel scatters and decoheres the blue light emitted by the second blue laser; The dichroic mirror is used to filter the blue light in the white light emitted by the all-yellow wheel, so that the yellow light emitted by the all-yellow wheel and the standard blue light emitted by the all-blue wheel form white light output. 22. The light emitting device according to claim 21, wherein the dominant wavelength of the blue laser light emitted by the second blue light laser is 462 nm. 23. A projection system, characterized by comprising the light emitting device according to any one of claims 1 to 22. 24. The projection system of claim 23, further comprising an imaging assembly, wherein: The imaging assembly includes a TIR prism, a DMD chip, and a projection lens, and the TIR prism is used to guide the light emitted by the color wheel assembly into the DMD chip, and guide the imaging light emitted by the DMD chip into the projection lens. in the shot. 25. The projection system according to claim 23, wherein when the color wheel assembly emits sequential blue light and yellow light under the excitation of the excitation light source, the projection system further comprises a spectroscopic device, and the spectroscopic device include: In the first optical path and the second optical path, when the yellow light of the color wheel assembly is in sequence, the light splitting device is used to divide the yellow light into green light and red light; wherein, the split green light and the compensation The cyan laser light of the light source is modulated through the first optical path, and the split red light and the red laser light of the compensation light source are modulated through the second optical path. 26. The projection system according to claim 25, characterized in that, during the time sequence when the color wheel assembly emits blue light, the blue light and the cyan laser light are processed through the first optical path or the second optical path modulation. 27. The projection system according to claim 25, characterized in that, in the timing segment when the color wheel assembly emits blue light, the first light path is used to distribute the blue light, and the second light path is used to distribute the blue light The cyan laser light passes through the first light path and the second light path to simultaneously modulate the blue light and the cyan laser light. 28. The projection system according to claim 25, characterized in that, the light splitting device further comprises: a third optical path, which is used to control the Blue light is modulated with the cyan laser. 29. The projection system according to claim 23, wherein when the color wheel assembly is excited by the excitation light source to emit white light within the entire time sequence, the projection system further comprises a spectroscopic device, and the spectroscopic device will The blue light in the white light is distributed to the first light path for modulation, the red light in the white light and the red laser light are distributed to the second light path for modulation, and the green light in the white light and the cyan laser light are distributed to the The third optical path is modulated. 30. The projection system according to claim 29, wherein when the light splitting device distributes the blue light in the white light to the first light path for modulation, it also distributes the blue light in part of the yellow light to the first light path Simultaneous modulation with the blue light.