CN106842790A - Light-source system and relevant projecting system - Google Patents

Abstract

The embodiment of the present invention discloses a light source system, including: a light emitting device, used to emit first light and second light in sequence; a light splitting system, used to divide the first light from the light emitting device The first range of wavelength light and the second range of wavelength light emitted by the second optical channel are also used to emit at least part of the second light from the light emitting device along the first optical channel; the first spatial light modulator is used for The light emitted by the optical splitting system along the first optical channel is modulated; the second spatial light modulator is configured to modulate at least part of the light emitted by the optical splitting system along the second optical channel. The invention provides a light source system with both luminous efficiency and lower cost.

Description

Light source system and related projection system

This application is a divisional application with the application number 201210370655.9 and the title of the invention "Light Source System and Related Projection System" submitted by the applicant on September 28, 2012.

technical field

The present invention relates to the field of illumination and display technology, in particular to a light source system and its related projection system.

Background technique

In the existing single-chip DMD (Digital Micromirror Device, digital micromirror device) system, multiple primary color lights alternately enter the DMD (DMD) and are modulated by it, and the modulated monochromatic light images are quickly alternately switched on the screen, and then The color image is formed by mixing the time-series monochromatic light images by using the residual visual effect of the human eye. However, in the prior art, R (red, red light), G (green, green light), and B (blue, blue light) three primary color lights are generally used for modulation. The most common way to obtain the sequential light of three primary colors is to sequentially excite different segments on the color wheel with excitation light to sequentially emit different colors of light. In this structure, the excitation light source adopts blue LED (Light Emitting Diode, light emitting diode) or blue laser. There are three partitions on the color wheel, one partition is provided with a light-transmitting area for transmitting blue light; the other two partitions are respectively provided with green phosphors and red phosphors, which are used to absorb excitation light and generate green stimulated light and Red by laser.

However, in this phosphor light source, the red phosphor is a bottleneck that limits the working life and luminous efficiency of the light source. The light conversion efficiency of red fluorescent powder is not high, and the lost energy is converted into heat, causing the temperature of the fluorescent powder to rise rapidly, which in turn will affect its luminous efficiency and service life, forming a vicious circle.

Contents of the invention

The technical problem mainly solved by the invention is to provide a light source system with both luminous efficiency and lower cost.

An embodiment of the present invention provides a light source system, including:

a light emitting device for sequentially emitting the first light and the second light;

The light splitting system is used to divide the first light from the light emitting device into the first range of wavelength light and the second range of wavelength light respectively emitted along the first light channel and the second light channel, and is also used to divide the second light from the light emitting device At least part of the light exits along the first optical channel;

a first spatial light modulator, configured to modulate the light emitted by the spectroscopic system along the first optical channel;

The second spatial light modulator is configured to modulate at least part of the light emitted by the light splitting system along the second optical channel.

An embodiment of the present invention also provides a projection system, including the above-mentioned light source system.

Compared with the prior art, the present invention includes the following beneficial effects:

In the present invention, the first light is split into the first range of wavelength light and the second range of wavelength light, and the light of the two wavelength ranges and at least part of the second light are sequentially emitted, so that only two beams are emitted in a certain period of time, and the other Only one light beam is emitted in a period of time, so that two spatial light modulators can be used to modulate three light beams; and the present invention can use a wavelength conversion material with higher light conversion efficiency to split the received light into two other light beams with higher light conversion efficiency. Low light conversion efficiency wavelength conversion material to color light to improve the efficiency of the light source.

Description of drawings

Figure 1 is the yellow light spectrum produced by the yellow phosphor;

Fig. 2 is a schematic diagram of an embodiment of the light source system of the present invention;

FIG. 3A is an embodiment of a timing diagram of light emitted by the wavelength conversion layer 203;

FIG. 3B and FIG. 3C are respectively an embodiment of the modulation time diagrams of DMD 211 and DMD 213 for different colored lights;

Fig. 4 is another embodiment of the modulation time diagram of the red light by the DMD 213;

5 is a schematic diagram of another embodiment of the light source system of the present invention;

6 is a schematic diagram of another embodiment of the light source system of the present invention;

Fig. 7 is a schematic diagram of another embodiment of the light source system of the present invention;

FIG. 8 is a front view of an embodiment of the color wheel 703 in FIG. 7;

Fig. 9 is a front view of yet another embodiment of the first spectroscopic device 609 in Fig. 6;

Fig. 10 is a schematic diagram of another embodiment of the light source system of the present invention;

11 is a schematic diagram of a light source structure in which a wavelength conversion layer is fixedly connected to a first light splitting device;

Fig. 12 is a schematic diagram of another embodiment of the light source system of the present invention;

FIG. 13A is a timing diagram of blue light and yellow light emitted by the wavelength conversion layer 1203;

Figure 13B and Figure 13C are respectively the modulation time diagrams of DMD1211 and DMD1213 for different colored lights;

Fig. 14 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention;

Fig. 15 is a schematic structural diagram of the light source group in the embodiment shown in Fig. 14;

Fig. 16 is a schematic diagram of another embodiment of the light source system of the present invention;

FIG. 17A is a color timing diagram of light emitted by the light source system shown in FIG. 16;

Figure 17B and Figure 17C are respectively the modulation time diagrams of DMD1611 and DMD1613 for different colored lights;

Fig. 18 is a schematic diagram of another embodiment of the light source system of the present invention;

Fig. 19 is an embodiment of the front view of the filter device in the light source system shown in Fig. 18;

FIG. 20 is a light emitting timing diagram of two light sources and a modulation timing diagram of two DMDs of the light source system shown in FIG. 18;

Fig. 21 is another embodiment of the front view of the filter device in the light source system shown in Fig. 18;

Fig. 22 is a schematic diagram of another embodiment of the light source system of the present invention;

Fig. 23 is a front view of the filter device in the light source system shown in Fig. 22;

Fig. 24 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention;

FIG. 25 is a timing diagram of light emission of three light sources and a timing diagram of modulation of two DMDs in the light source system shown in FIG. 24;

Fig. 26 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention;

FIG. 27 is a light emission timing diagram of four light sources of the light source system shown in FIG. 26 and a modulation timing diagram of two DMDs;

Fig. 28 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention;

Figure 29 is an embodiment of the front view of the wavelength conversion layer in the light source system shown in Figure 28;

Fig. 30 is a working sequence of the light source system shown in Fig. 28;

Fig. 31 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention;

Fig. 32 is a schematic structural view of an embodiment of the light source system of the present invention;

Fig. 33 is a schematic structural diagram of another embodiment of the light source system of the present invention.

detailed description

The inventive idea of the present invention includes: emitting the first light and the second light in sequence through the light-emitting device, and dividing the first light into two beams of light with different wavelength ranges propagating along different paths through the light-splitting system. Lights of two different wavelength ranges are sent to two spatial light modulators, and at least part of the second light is emitted to one of the two spatial light modulators during another period of time, so that two spatial light modulators can be used to control three different beams of light At the same time, it is also possible to avoid the use of red phosphors with low photoconversion efficiency by splitting the yellow light emitted by the excited yellow phosphors with high photoconversion efficiency into red light and green light. Generates red light to increase the efficiency of the light source system.

As shown in Figure 1, Figure 1 is a specific example of the yellow light spectrum produced by the yellow phosphor. It can be seen from the figure that the spectrum of the yellow light produced by the phosphor is relatively broad, covering the spectrum of green light and the spectrum of red light. Therefore, yellow light can be split into green and red light. For ease of description, the spectrum of the yellow light mentioned below covers the red light component and the green light component, and the yellow light can be split into red light and green light traveling along different paths through the filter device.

Embodiments of the present invention will be described in detail below with reference to the drawings and implementation methods.

Embodiment one

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of an embodiment of the light source system of the present invention. The light source system 200 of this embodiment includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 211 and a second spatial light modulator 213 .

The light emitting device 1 includes an excitation light source 201 for generating excitation light, a wavelength conversion layer 203 and a first driving device 205 . The wavelength conversion layer 203 includes a first subregion and a second subregion, the first subregion is provided with a first wavelength conversion material for absorbing the excitation light and emitting the first light; the second subregion is provided with a light-transmitting region for The excitation light is transmitted, which is the second light. In this embodiment, the excitation light source 201 is used to generate blue excitation light. The excitation light source 201 is preferably a laser light source, and may also be an LED or other solid-state light sources. The first subregion on the wavelength conversion layer 203 is provided with a yellow light phosphor, which is used to absorb the excitation light and generate a yellow stimulated light, which is the first light; the second subregion is a light-transmitting region, which is used to transmit blue light, which is second light. The wavelength conversion layer 203 is disc-shaped, and different partitions on the wavelength conversion layer are distributed along the circumference of the disc.

The first driving device 205 is used to drive the wavelength conversion layer 203, so that the light spot formed by the excitation light on the wavelength conversion layer 203 acts on the wavelength conversion layer 203 according to a predetermined path, so that the excitation light is sequentially irradiated on the first division and the second division. partitions, so that the first light and the second light are sequentially emitted. In this embodiment, the first driving device 205 is a motor, which is used to drive the wavelength conversion layer 203 to rotate periodically.

The light splitting system 2 is used to divide the first light from the light emitting device 1 into the first range wavelength light and the second range wavelength light emitted along the first light channel and the second light channel; At least part of the light exits along the first light channel. The first spatial light modulator 211 is used for modulating the light emitted by the spectroscopic system 2 along the first optical channel. The second spatial light modulator 213 is used for modulating at least part of the light emitted by the optical splitting system 2 along the second optical channel. The light modulated by the first spatial light modulator 211 and the second spatial light modulator 213 is combined and enters the projection area.

In this embodiment, the light splitting system 2 splits the yellow light into green light, which is light in the first range of wavelengths, and red light, which is light in the second range of wavelengths. For clarity of description, in the following examples, when the first yellow light is split into green light and red light, the first range of wavelength light and the second range of wavelength light are not necessarily green light and red light respectively, and the two ranges of light It is only a relative concept, and the first range of wavelength light and the second range of wavelength light can also be red light and green light respectively.

The first spatial light modulator 211 is used for modulating the sequential blue light and green light, and the second spatial light modulator 213 is used for modulating the red light. Since the conversion efficiency of the yellow phosphor is relatively high, and the blue light is directly generated by the light emitting device, the yellow phosphor is excited by the blue light to generate three primary colors, so that the efficiency of the light source is high.

Specifically, for example, the spectroscopic system 2 includes a combination of TIR (Total Internal Reflection, total internal reflection) prisms 207 and 209 . These two prisms are triangular prisms, wherein the sides of the first prism 207 are 207a, 207b and 207c, and the sides of the second prism 209 are 209a, 209b and 209c; 209c is connected.

The received light 23 emitted by the wavelength conversion layer 203 enters the prism from the side 207b of the first prism 207, and is totally reflected on the side 207a, and is transmitted through the side 207c and enters the second prism 209 from the side 209c of the second prism 209. Arrive on side 209a. The side 209a is a coated surface on which a filter film is coated, and the filter film transmits red light and reflects blue light and green light. The sequentially generated blue light and green light are reflected by the coating surface 209a and then totally reflected on the side surface 209c, and are transmitted on the side surface 209b to enter the first spatial light modulator 211 from the first optical channel. The modulated blue light and green light are incident on the side 209b at another angle and transmitted, and are totally reflected on the side 209c, then reflected by the coating surface 209a, transmitted from the side 209c and transmitted out from the first prism 207. The red light enters the second spatial light modulator 213 from the second optical channel after being transmitted through the coating surface 209 a. The modulated red light is sequentially transmitted through the second prism 209 and the first prism 207, and combined with the modulated green light into a beam.

The spatial light modulator may be a DMD, or other types of spatial light modulators such as liquid crystals. For convenience of description, DMD is used as an example in the following embodiments.

As shown in FIG. 3A , FIG. 3A is an embodiment of a timing diagram of light emitted by the wavelength conversion layer 203 . In this embodiment, the first subregion on the wavelength conversion layer 203 occupies 270 degrees, and the second subregion occupies 90 degrees. Starting from the second subregion of the wavelength conversion layer 203 entering the incident optical path of the excitation light, and within a period T of the rotation of the wavelength conversion layer 203, the working process of the light source system is as follows. In the first 0.25T, the wavelength conversion layer 203 emits blue light, and in the last 0.75T, the wavelength conversion layer 203 emits yellow light. Correspondingly, the DMD 211 in the first 0.25T is used to modulate the blue light, and the DMD 213 is not used to modulate the light beam. DMD211 in the last 0.75T is used to modulate green light, and DMD 213 is used to modulate red light. As shown in FIG. 3B and FIG. 3C , FIG. 3B and FIG. 3C are respectively an embodiment of the modulation time diagrams of the DMD 211 and the DMD 213 for different colored lights. In this case, both the red light and the green light are utilized in each period T, so that the utilization of the light source is most efficient. However, this may not be the actual situation, because it may cause the color coordinates of the white light mixed with the three primary colors to deviate from the predetermined color coordinates. In practical applications, the color coordinates of white light can be controlled to achieve satisfaction by using the length of the modulation time of the two DMDs for different color lights. For example, in this embodiment, if too much red light causes the color coordinate of white light to be reddish, the modulation time of the DMD 213 can be controlled to be shortened so that the red light in a certain period of time is invalid light. As shown in FIG. 4 , FIG. 4 is another embodiment of the modulation time diagram of the red light by the DMD 213 . In Fig. 4, the latter part of the red light in each period T is discarded. In practical application, it is easy to understand that the front section of the red light can also be discarded, or one or several sections in the middle can be discarded.

In addition, the above proportions of the first subregion and the second subregion are just examples, and do not limit their actual proportions. In actual operation, the proportion of the first partition and the second partition can be determined according to actual needs.

In this embodiment, the light emitting device sequentially emits the first light and the second light, and divides the first light into two beams of light with different wavelength ranges traveling along different paths through the light splitting system. Lights of different wavelength ranges are sent to two spatial light modulators, and at least part of the second light is emitted to one of the two spatial light modulators during another period of time, so that three different beams of light can be treated by two spatial light modulators to modulate.

In practical application, the filter curve on the coating surface 209a in the TIR prism 209 in the spectroscopic system 2 can also transmit green light and blue light, and reflect red light. In this case, DMD 211 is used to modulate red light , DMD 213 is used to modulate green light and blue light; or the filter curve on the coating surface 209a is changed to transmit green light and reflect red light and blue light; then DMD 211 is used to modulate red light and blue light, and DMD 213 is used to modulate green light Light. In practical applications, the filter curve of the coating surface 209a can be designed according to actual needs.

The above optical paths of the received light in the two TIR prisms are just examples for convenience of description, and do not limit other usages of the TIR prisms.

In the above embodiment, two prisms are used to simultaneously split the green and red components of the yellow light and combine the light beams modulated by the two spatial light modulators. In practical application, it is also possible to use a spectroscopic filter to split the yellow light, and use a filter at the rear end of the optical path of the two DMDs to combine the modulated beams.

Embodiment two

As shown in FIG. 5, FIG. 5 is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 500 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 511 and a second spatial light modulator 513 . The light emitting device 1 includes an excitation light source 501 , a wavelength conversion layer 503 and a first driving device 505 .

The differences between this embodiment and the embodiment shown in Figure 2 include:

The spectroscopic system 2 includes a filter 509 and a mirror 507 . The filter 509 is used to receive the yellow light 53 and the blue light 55 sequentially emitted by the wavelength conversion layer 503, and transmit the green light 53a of the blue light 55 and the yellow light 53 to the DMD511 from the first optical channel, and reflect the yellow light 53 The red light 53b goes to the reflector 507, and the reflector 507 reflects the red light 53b to be emitted from the second optical channel to the DMD513.

Preferably, the light source system 500 further includes a filter 515 and a reflector 517 respectively disposed on the outgoing light paths of the DMD511 and the DMD513. The mirror 517 is used to reflect the time-sequential blue light and green light modulated by the DMD511 to the filter 515 . The filter 515 is used to reflect the blue light and the green light from the reflector 517 and transmit the red light from the DMD513, so as to combine the light beams modulated by the DMD511 and the DMD513 into one light beam. It can be understood that, in other embodiments, by setting the light exit angles of DMD 511 and DMD 513, the two beams of light respectively emitted by DMD 511 and DMD 513 can be converged into one beam of light; in addition, in some applications, it is not necessary to The two beams of light emitted by the DMD511 and the DMD513 respectively need to be converged into one beam of light, so the mirror 517 and the filter 515 can be omitted.

Embodiment three

Please refer to FIG. 6 . FIG. 6 is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 600 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 611 and a second spatial light modulator 613 . The light emitting device 1 includes an excitation light source 601 , a wavelength conversion layer 603 and a first driving device 605 .

The differences between this embodiment and the embodiment shown in Figure 5 include:

The spectroscopic system 2 includes a first spectroscopic device 609, a second driving device 607 and a first control device (not shown). In order to improve the utilization rate of the light emitted by the light emitting device 1, the light source system 600 also includes a collecting lens 615 arranged on the optical path between the light emitting device 1 and the spectroscopic system 2, for collecting the yellow light 63 and the blue light sequentially emitted by the light emitting device 65, and relay the collected light to the first spectroscopic device 609. The first spectroscopic device 609 is disc-shaped and divided into a first section and a second section along the circumferential direction. The second driving device 607 is used to drive the first spectroscopic device to rotate, so that the first segment and the second segment are sequentially on the outgoing light path of the light emitting device 1 . The first control device controls the rotation of the first driving device 605 and the second driving device 607, so that the first light splitting device 609 and the wavelength conversion layer 603 rotate synchronously, so that the first section is located at the output of the first light, that is, the yellow light 63. On the outgoing light path, the second section is located on the outgoing light path of the second light, that is, the blue light 65 .

The first section on the first light splitting device 609 is used to transmit the green light in the yellow light 63 from the second light channel to the DMD 613 and reflect the red light in the yellow light 63 to go out from the first light channel to the DMD 611. The second section is used to reflect the blue light 65 from the first optical channel to the DMD 611 . Of course, in practice, the first section can also reflect red light and transmit green light; or, the second section can also transmit part of blue light and reflect part of blue light, wherein the two beams of blue light transmitted and reflected can be respectively DMD 611 and DMD 613 modulate, or only one of the two beams can be modulated.

Embodiment Four

Please refer to FIG. 7 , which is a schematic diagram of another embodiment of the light source system of the present invention.

In this embodiment, the light source system 700 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 711 and a second spatial light modulator 713 . The light emitting device 1 includes an excitation light source 701 , a wavelength conversion layer 703B and a first driving device 705 . The spectroscopic system 2 includes a first spectroscopic device 703A and a light guiding device 3 .

The differences between this embodiment and the embodiment shown in Figure 6 include:

In this embodiment, the wavelength conversion layer 703B is fixedly connected to the first light splitting device 703A, and is jointly arranged on the color wheel 703 . As shown in FIG. 8 , FIG. 8 is a front view of an embodiment of the color wheel 703 in FIG. 7 . The color wheel 703 is provided with two concentric ring regions 703A and 703B nested with each other, wherein the ring 703A is the light splitting area, that is, the first light splitting device; the ring 703B is the wavelength conversion area, that is, the wavelength conversion layer. The light splitting area 703A includes a first section S1, which is used to transmit green light to the first light channel and reflect red light to the second light channel; the light splitting area 703A also includes a second section S2, which is used to transmit blue light to the second light channel. The first light channel exits. The wavelength conversion region 703B includes a first subregion W1, which is provided with a yellow wavelength conversion material for generating yellow received light. This subregion is set at 180 degrees relative to the center of the ring shape from the first section S1 in the light splitting region 703A; it also includes The second subsection W2 is provided with a light-transmitting area for transmitting blue light, and the subsection and the second section S2 in the light-splitting area 703A are arranged at 180 degrees relative to the center of the ring. The first driving device 705 is used to drive the color wheel 703 to rotate, so that the first subregion W1 and the second subregion W2 are sequentially located on the outgoing light path of the light emitting device 1 .

The light guiding device 3 is used to guide the sequential light emitted from the first subregion W1 and the second subregion W2 on the wavelength conversion layer 703B to the first section S1 and the second section S2 on the first light splitting device 703A respectively. The specific explanation is as follows.

In this embodiment, the light guiding device 3 includes a lens 707 , mirrors 709 and 715 . In one cycle T of the rotation of the color wheel 703, during the first time t1, the excitation light 71 generated by the excitation light source 701 is incident on the first subregion W1 on the wavelength conversion region 703B and emits yellow light, and the emitted light 73 is emitted from the wavelength conversion region 703B The side facing away from the excitation light exits, is collected by the lens 707, is reflected by the reflectors 709 and 715 in turn, and is incident on the first section S1 on the spectroscopic area 703A at 45 degrees. The green light component and the red light component in the yellow light They are respectively transmitted and reflected by the first segment S1 and respectively output to the DMD 711 along the first optical channel and output to the DMD 713 along the second optical channel.

In the next t2 time, the excitation light 71 is incident on the second subarea W2 and emits blue light, guided by the light guiding device 3 and incident on the second section S2 at an angle of 45 degrees, and then incident on the DMD 711 from the second light channel after being transmitted. The line connecting the light spot A formed by the excitation light 71 on the spectroscopic region 703A and the light spot B formed on the wavelength conversion region 703B passes through the center of the ring. Of course, in practical applications, the incident angle of the outgoing light 73 entering the spectroscopic area 703A may not be 45 degrees but other angles greater than 0, which can be designed according to actual needs.

In this way, compared with the light source system shown in Figure 6, the wavelength conversion layer and the first light splitting device can rotate synchronously, the synchronization of the two is better, and no control device is needed to control the synchronization, which reduces the cost and the volume of the light source .

Embodiment five

Please refer to FIG. 9 , which is a front view of another embodiment of the first light splitting device 609 in FIG. 6 . Different from the light source system shown in FIG. 6 , the first light splitting device 609 in this embodiment includes three sections. The first section R1 is used to transmit red light to the first light channel and reflect green light to the second light channel. The second section R2 is used to transmit the green light to the first light channel and reflect the red light to the second light channel. The third section is used to transmit part of the blue light to the first light channel and reflect part of the blue light to the second light channel.

Correspondingly, the first control device is used to control the first spectroscopic device 609, so that the first section R1 and the second section R2 are located on the outgoing light path of the first light, and the third section R3 is located on the outgoing light path of the second light. on the light path. Specifically, in T when yellow light is emitted, the first section R1 is located on the outgoing light path of yellow light in the first part of time t1, and the second section R2 is located on the outgoing light path of yellow light in the latter part of time t2. During the blue light, the third section R3 is located on the outgoing light path of the blue light.

In this embodiment, in a period when the wavelength conversion layer 603 rotates to generate Y (yellow, yellow), B (blue, blue) sequence light, DMD 611 receives G (green, green), R (red, Red), B sequence light, DMD 613 receives R, G, B sequence light sequentially. Therefore, compared with the above embodiments, the two DMDs in this embodiment can respectively receive the three-primary-color sequential light, and then each DMD can modulate an image respectively, and at any time period, the two DMDs are all in the working state. The above embodiments can make more full use of DMD.

It is easy to understand that in this embodiment, the wavelength conversion layer may also be fixedly connected to the first light splitting device. Correspondingly, in the light source system shown in FIG. 7 , the first segment S1 on the light splitting area on the color wheel 703 needs to be divided into a first sub-area and a second sub-area, wherein the first sub-area is used to transmit red light to The first light channel exits to DMD 711, and reflects green light to the second light channel, exits to DMD 713; the second sub-area is used to transmit green light to the first light channel, exits to DMD 713, and reflects red light to the second light Channel exits to DMD 711.

Embodiment six

The light source system shown in FIG. 7 is only one structure in which the wavelength conversion layer is fixedly connected to the first light splitting device, and there are many other light path structures in practical use. Please refer to FIG. 10 , which is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 1000 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 1011 and a second spatial light modulator 1013 . The light emitting device 1 includes an excitation light source 1001 , a wavelength conversion layer 1003B and a first driving device 1005 . The spectroscopic system 2 includes a first spectroscopic device 1003A and a light guiding device 3 . The wavelength conversion layer 1003B is fixedly connected to the first light splitting device 1003A, and is jointly arranged on the color wheel 1003 .

The differences between this embodiment and the embodiment shown in Figure 7 include:

The wavelength conversion region 1003B is set to be reflective, that is, the optical path of the incident light and the optical path of the outgoing light of the wavelength conversion region 1003B are located on the same side. And the first subregion W1 on the wavelength conversion region 1003B is set at 0 degrees to the first segment S1 on the spectroscopic region 1003A, and the second subregion W2 is set at 0 degrees to the second segment S2 on the spectroscopic region 1003A, that is, the spectroscopic region It is arranged adjacent to the corresponding wavelength conversion region.

The light guiding device 3 comprises a mirror 1007 with a through hole, collecting lenses 1009 and 1015 .

In this embodiment, the excitation light source 1001 is a laser light source for generating blue laser light 101 . The reflection mirror 1007 is arranged on the outgoing light path of the blue laser 101 . Because the etendue of the laser is relatively small, and the etendue of the received laser is relatively large, the blue laser 101 passes through the through hole and enters the wavelength conversion region 1003B after passing through the collecting lens 1009, and the wavelength conversion region 1003B exits After being collected by the collecting lens 1009, most of the sequence light is reflected by the mirror 1007 to the light splitting area 1003A. The light spots formed on the light splitting area 1003A and the light spots formed on the wavelength conversion area 1003B are located on the same radius line on the color wheel 1003 . Compared with the light source system shown in FIG. 7 , the light path of the light source system in this embodiment is more compact.

Embodiment seven

Please refer to FIG. 11 . FIG. 11 is a schematic diagram of another light source structure in which the wavelength conversion layer is fixedly connected to the first light splitting device. In this embodiment, the light source system 1100 includes a light emitting device, a light splitting system 2 , a first spatial light modulator 1111 and a second spatial light modulator 1113 . The light emitting device includes an excitation light source 1101 , a wavelength conversion layer 1103B and a first driving device 1105 . The spectroscopic system 2 includes a first spectroscopic device 1103A and a light guiding device 3 . The wavelength conversion layer 1103B is fixedly connected to the first light splitting device 1103A, and is jointly arranged on the color wheel 1003 .

The differences between this embodiment and the embodiment shown in Figure 10 include:

The wavelength conversion region 1103A and the light splitting region 1103B are not two ring regions nested with each other. A circular platform 1103C is provided in the central area of the color wheel 1103 , the wavelength conversion layer area 1103B is located on the side of the circular platform 1103C, and the light splitting area 1103A is located on a ring area of the color wheel 1103 . The blue laser light 111 passes through the through hole of the reflecting mirror 1107 and the collecting lens 1109 in sequence, and is incident on one of the segments of the wavelength conversion region 1103B. Most of the sequential light 113 emitted from the wavelength conversion area 1103B is collected by the collecting lens 1109 and reflected by the mirror 1107 to the division corresponding to the section of the light spot on the wavelength conversion area 1103B on the beam splitting area 1103A.

Compared with the light source system shown in FIG. 10 , in this embodiment, since the wavelength conversion region 1103B is far away from the spectroscopic region 1103A, the included angle between the sequence light 113 before and after reflection by the mirror 1107 is relatively large, which is relatively large. Easy to separate the light path.

In the above embodiments, the second subregion on the wavelength conversion layer may also be provided with a second wavelength conversion material for absorbing the excitation light and emitting the second light. As a specific example, an excitation light source is used to generate UV light. The first section of the wavelength conversion layer is provided with yellow phosphor for absorbing UV light and producing yellow light; the second section is provided with blue phosphor for absorbing UV light and producing blue light, which is the second light .

Embodiment Eight

The schematic diagram of the light source system in this embodiment is basically the same as the schematic diagram of the light source system in the above embodiments. The third range of wavelength light and the fourth range of wavelength light, the first spatial light modulator is used to modulate the first range of wavelength light of the first light and the third range of wavelength light of the second light emitted along the first optical channel , and the second spatial light modulator is used to modulate the second range of wavelength light of the first light emitted along the second optical channel, or is also used to modulate the fourth range of wavelength light of the second light emitted along the second optical channel to modulate.

Taking FIG. 5 as an example, the excitation light source 501 is used to generate UV light. The first subregion of the wavelength conversion layer 503 is provided with yellow fluorescent powder for absorbing UV light and generating yellow light; the second subregion is provided with blue phosphor powder for absorbing UV light and generating blue light, which is the second Light. Since the blue light produced by the blue phosphor has a wider spectrum, it covers part of the green light spectrum. The optical filter 509 in the spectroscopic system is also configured to split the second light generated by the second division, that is, the blue light, into a third range of wavelength light and a fourth range of wavelength light, that is, the second blue light and the second green light. In this way, the generated second blue light and second green light have a narrower spectrum and higher color purity.

Correspondingly, when splitting the blue received light generated by the second division into the second blue light and the second green light, in the light splitting system of the light source system shown in FIG. 2 , the coated surface in the second prism 209 can be 209a is also set to reflect the blue light component and transmit the green light component in the blue received light, or to transmit the blue light component and reflect the green light component. In the spectroscopic system of the light source system shown in Figure 5, the optical filter 509 can be set to reflect the second blue light in the blue received light and transmit the second green light, or transmit the second blue light and reflect the second green light . In the above description, the same spectroscopic device in the spectroscopic system is used to split the first light and the second light.

In practical applications, two spectroscopic devices may be used in the spectroscopic system to split the first light and the second light respectively. As shown in FIG. 12 , FIG. 12 is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 1200 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 1211 and a second spatial light modulator 1213 . The light emitting device 1 includes an excitation light source 1201 , a wavelength conversion layer 1203 and a first driving device 1205 .

The differences between this embodiment and the embodiment shown in Figure 5 include:

The spectroscopic system 2 includes optical filters 1221 , 1209 and 1207 , and also includes a mirror 1219 . The optical filter 1221 is located on the optical path of the sequential light emitted by the light emitting device 1, and is used to reflect the second blue light 65b of the blue received light and transmit the second green light 65a and the yellow received light 63 of the blue received light.

The optical filter 1209 is located on the outgoing optical path of the transmitted light beam of the optical filter 1221, and is used to transmit the second green light 65a in the blue received light and the first green light 63a in the yellow received light 63 and reflect the second green light 63a in the yellow received light 63. Red light 63b. Therefore, the second green light 65a and the first green light 63a transmitted by the filter 1209 are emitted to the DMD 1211 along the first light channel. The red light 63b reflected by the optical filter 1209 is then reflected by the optical filter 1207 and exits to the DMD 1213 along the second optical channel, while the second blue light 65b reflected by the optical filter 1221 is respectively reflected by the mirror 1219 and the optical filter 1207 After being transmitted, it exits to the DMD 1213 along the second optical channel.

When the second blue light 65b and the second green light 65a obtained after splitting the blue light 65 are both used for modulation, since the colors used for modulation by the two DMDs increase, the color gamut that the two DMDs can modulate is larger. Correspondingly, the working sequence diagram of the wavelength conversion layer 1203 and the DMDs 1211 and 1213 is shown in FIG. 13 . FIG. 13A is a timing diagram of blue light and yellow light emitted by the wavelength conversion layer 1203 . During one cycle T of the rotation of the wavelength conversion layer 1203, the wavelength conversion layer 1203 emits blue light in the first 0.25T, and emits yellow light in the last 0.75T. As shown in FIG. 13B and FIG. 13C , FIG. 13B and FIG. 13C are modulation time diagrams of DMD1211 and DMD1213 for different color lights respectively. Correspondingly, DMD1211 in the first 0.25T is used to modulate the second green light, and DMD1213 is used to modulate the second blue light. The DMD 1211 in the last 0.75T is used to modulate the first green light, and the DMD 1213 is used to modulate the red light.

It is easy to understand that the second green light may not be used for modulation, and this part of light may not be modulated as long as the DMD 1211 is not working when it enters the DMD 1211 .

In the above embodiments, the differences in light wavelengths are utilized, and optical filters or filter films are used to transmit and reflect light beams to split or combine light. Whether the light on a certain optical path is transmitted or reflected on a spectroscopic filter can be designed arbitrarily. Therefore, in all embodiments of the present invention, the specific optical structure in which light in different wavelength ranges on each optical path passes through the filter or filter film is an example for the convenience of description, and does not limit the use of other methods that utilize spectroscopic An optical structure that combines light paths or splits light beams with filters or filter films.

In this embodiment, multiple subregions may also be provided on the wavelength conversion layer 1203, where different wavelength conversion materials or light-transmitting regions are provided on different subregions. And the light beam emitted from at least one subregion is split into light in two different wavelength ranges so that the light in the two different wavelength ranges respectively enters two spatial light modulators for modulation.

In this embodiment, the first subregion and the second subregion may also be provided with wavelength conversion materials that generate light of other colors, and are not limited to the above-mentioned yellow phosphor and blue phosphor. The wavelength conversion material may also be materials with wavelength conversion capabilities such as quantum dots and fluorescent dyes, and is not limited to phosphors.

Embodiment nine

Please refer to FIG. 14 . FIG. 14 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention. The difference from the above embodiments is that in the above embodiments, the light-emitting device 1 generates sequential light through the color wheel, but in this embodiment, the light-emitting device 1 sequentially reflects the different colors of light emitted by the LED lamp panel through a rotating reflector to generate For time-sequential light, compared with Embodiment 1, the use of reflectors in this embodiment can control the cost.

Specifically, the light emitting device 1 includes a light source group 1401, a first reflecting device 1405, a second reflecting device 1403 and a second driving device (not shown).

The light-emitting light source group 1401 includes a first light-emitting device (yellow phosphor LED 1401a in this embodiment) and a second light-emitting device (blue LED 1401b in this embodiment), wherein the phosphor LED refers to the phosphor coated On the surface of the LED chip, the light emitted by the LED is used to excite the phosphor and emit fluorescence. The common yellow phosphor LED refers to coating the yellow phosphor on the surface of the blue LED chip, and being excited by the blue light emitted by the blue LED to produce yellow light. The yellow LEDs 1401a and the blue LEDs 1401b are distributed in a ring shape, and the directions of the light emitted by the yellow LEDs 1401a and the blue LEDs 1401b are parallel to the central axis passing through the center of the ring.

The second reflecting device is a rotating mirror 1403 in this embodiment, which includes a reflecting surface and is arranged on the side of the light emitting light source group 1401 where the light is emitted, and is located between the first light emitting device 1401a and the second light emitting device 1401b.

The first reflecting device 1405 includes two reflecting elements, both of which are reflective mirrors in this embodiment, respectively located on the outgoing light paths of the first light emitting device 1401a and the second light emitting device 1401b, and are used to reflect the outgoing light of different light emitting devices to The second reflecting device 1403 .

The second driving device drives the second reflecting device 1403 to move, so that the reflecting surfaces are sequentially placed on the outgoing light paths of the two reflecting elements of the first reflecting device 1405, so as to sequentially reflect and emit the light emitted by the first and second light emitting devices.

In practice, the light emitting source group 1401 may also include multiple light emitting device arrays, which are LED arrays in this embodiment. Correspondingly, the first reflecting device 1405 includes a plurality of reflecting mirrors, which are respectively placed on the outgoing light paths of the plurality of light emitting device arrays in the light source 1401 .

As shown in FIG. 15 , FIG. 15 is a schematic structural diagram of the light emitting light source group 1401 in this embodiment. The LEDs in the light source group 1401 are arranged on a disc with the rotating mirror 1403 as the center, arranged around the rotating mirror 1403 in the circumferential direction, and arranged in an array in the radial direction with the rotating mirror 1403 as the center. In the radial array distribution, the LED arrays are LEDs that emit light of the same color, and in the circumferential arrangement, yellow phosphor LEDs 1401a and blue LEDs 14101b are alternately distributed.

Embodiment ten

Please refer to FIG. 16 . FIG. 16 is a schematic diagram of another embodiment of the light source system of the present invention. The light source system 1600 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 1611 and a second spatial light modulator 1613 .

The differences between this embodiment and the embodiment shown in Figure 5 include:

The light-emitting device 1 includes a first light-emitting device, a second light-emitting device and a first control device (not shown), wherein the first light-emitting device is used to generate first light, and the second light-emitting device is used to generate second light; the first control The device is used to alternately light up the first light-emitting device and the second light-emitting device during at least part of the period, so as to emit the first light and the second light in time sequence.

Specifically, the first light emitting device is a yellow LED 11a, and the second light emitting device is a blue LED 11b, which are used to generate yellow light and blue light respectively. The first control device is used to respectively control the on and off of the light emitting devices of different colors, so that the blue LED 11b and the yellow LED 11a are alternately lit, so as to generate sequential yellow light and blue light.

In this embodiment, the first control device can control the yellow LED 11a and the blue LED 11b to light up simultaneously during a certain period of time. Since the green light obtained by splitting the blue light and the yellow light is modulated in the DMD 1611, the DMD 1611 is used to combine the blue light and the green light, that is, the cyan light, during the time period when the yellow light LED11a and the blue light LED11b are simultaneously on. Modulation has no effect on DMD 1613. During this period of time, due to the mixing of the two lights, the DMD 1611 can modulate one more color, so that the color gamut that the DMD 1611 can modulate is larger.

As shown in FIG. 17A , FIG. 17A is a timing diagram of colors of light emitted by the light source system 1600 . In a cycle T, within the time t1, the blue LED is turned on, and the light-emitting device 1 emits blue light; during the time t2, the yellow LED is turned on, and the light-emitting device 1 emits yellow light; As for the blue LED and the yellow LED, the light emitting device 1 emits the combined light of the two kinds of light, that is, white light. As shown in FIG. 17B and FIG. 17C , FIG. 17B and FIG. 17C are modulation time diagrams of DMD1611 and DMD1613 for different color lights respectively. Correspondingly, DMD 1611 is used to modulate blue light during t1, and DMD1613 is not working; DMD1611 is used to modulate green light, and DMD1613 is used to modulate red light during t2; DMD1611 is used to modulate blue light, and DMD1613 is used to modulate within t3 red light.

However, the two colors of light cannot be turned on at the same time all the time, because there are only two DMDs in the light source system, and one of the DMDs is used to modulate blue light and green light at different time periods. If the yellow LED 11 a and the blue LED 11 b are kept on at the same time, there will be no monochromatic images of blue and green, but only the image of cyan light.

It is easy to understand that if the optical filter 1609 in the spectroscopic system 2 is used to transmit red light and reflect green light, the red light obtained after the blue light and yellow light are split is modulated in the DMD 1611, and the green light is modulated in the DMD 1613 to modulate. Then, during the time period when the yellow LED 11a and the blue LED 11b are simultaneously on, the DMD 1611 is used to modulate the combined light of blue light and red light, that is, purple light, and the DMD 1613 has no effect.

Compared with the above embodiments, this embodiment can light up light emitting devices of different colors at the same time, so that more color lights are used for modulation, and thus the color gamut that can be modulated is larger.

Embodiment Eleven

Please refer to FIG. 18 . FIG. 18 is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 1800 includes a light emitting device 1 , a light splitting system 2 , a first spatial light modulator 1811 and a second spatial light modulator 1813 .

The differences between this embodiment and the embodiment shown in Figure 16 include:

The spectroscopic system 2 includes a filter device 1805, a second drive device 1806 for driving the filter device to move, and a first control device (not shown). The filter device 1805 includes a first section, a second section and a third section, wherein the first section is used to transmit the first range of wavelength light of the first light to the first optical channel, and reflect the second range The wavelength light is emitted to the second optical channel; the second section is used to reflect the first range of wavelength light of the first light to the second optical channel, and transmit the second range of wavelength light to the first optical channel; the third section It is used to transmit part of the second light to the first light channel and reflect part of the second light to the second light channel. The first control device is used to control the second driving device 1806, so that at least part of the first section and at least part of the second section are sequentially located on the outgoing light path of the first light, and at least part of the third section is located on the second The outgoing light path of the light.

Specifically, as shown in FIG. 19 , FIG. 19 is an embodiment of a front view of the filter device in the light source system shown in FIG. 18 . The optical filter device 1805 is in the shape of a disc, and various segments on the disc are distributed along the circumference of the disc. The first section 1805A on the filter device 1805 is used to transmit part of blue light and reflect part of blue light, the second section 1805B is used to transmit green light and reflect red light, and the third section 1805C is used to reflect green light and transmit red light. Light. The second driving device 1806 is a motor, which is used to drive the filter device 1805 to rotate periodically, so that each section is sequentially located on the outgoing light path of the light emitting device 1 .

As shown in FIG. 20 , FIG. 20 is a light emitting timing diagram of two light sources and a modulation timing diagram of two DMDs of the light source system shown in FIG. 18 . In a modulation cycle T, in the first time t1, the first section 1805A of the filter device 1805 is located on the outgoing light path of the sequential light, then the blue light source 1801 is turned on, and the yellow light source 1802 is not working, and the two DMDs use for modulating blue light. In the following time t2, the second section 1805B of the filter device 1805 is located on the outgoing light path of the sequential light, the yellow light source 1802 is turned on, and the blue light source 1801 is not working, then the DMD1811 is used to modulate the green light, and the DMD1813 is used to Modulate red light. In the following time t3, the third section 1805C of the filter device 1805 is located on the outgoing light path of the sequential light, the yellow light source 1802 is turned on, and the blue light source 1801 is not working, then the DMD1811 is used to modulate the red light, and the DMD1813 is used to Modulate green light. In this way, the two DMDs can respectively modulate the sequential three primary color lights.

Embodiment 12

Please refer to FIG. 21 . FIG. 21 is another embodiment of the front view of the filter device in the light source system shown in FIG. 18 .

In this embodiment, the filter device 1805 also includes a fourth section for reflecting blue light and transmitting yellow light, and different from the light source system shown in FIG. 18 , the first section 1805A is used for transmitting blue light and transmitting yellow light. Reflecting yellow light; when the first section 1805A and the fourth section 1805D are located on the outgoing light path of the sequential light, the blue light source 1801 and the yellow light source 1802 are turned on simultaneously. Correspondingly, in one modulation period T, when the first section, the second section, the third section and the fourth section of the filter device 1805 are sequentially located in the outgoing light path of the sequential light, the DMD 1811 sequentially modulates Blue light, green light, red light and yellow light, DMD1813 modulates yellow light, red light, green light and blue light in turn. In this embodiment, since the modulated color adds yellow light, the brightness of the light source system is improved.

In the light source system shown in Figure 18, a blue light source and a yellow light source are used to sequentially light up different spectral regions on the filter device to provide at least three sequential lights for the two DMDs respectively, wherein the blue light source produces The light is split into two blue beams to the two DMDs. In practical applications, two blue light sources may also be used to provide two beams of blue light for two DMD modulations respectively. The details are as follows.

Embodiment Thirteen

Please refer to FIG. 22 , which is a schematic diagram of another embodiment of the light source system of the present invention. In this embodiment, the light source system 2200 includes a light emitting device, a light splitting system, a first spatial light modulator 2211 and a second spatial light modulator 2213 . The light emitting device includes a first light emitting device 2201A, a second light emitting device 2202, a third light emitting device 2201B and a first control device (not shown). The spectroscopic system includes a filter device 2205 , a second driving device 2206 , and filters 2203 and 2204 .

The differences between this embodiment and the embodiment shown in Figure 18 include:

The light emitting device further includes a third light emitting device, configured to generate fourth light during at least a part of the period when the second light is emitted. In this embodiment, the third light emitting device is a blue light source 2201B. The filter device 2205 in the spectroscopic system includes two sections, that is, the second section and the third section on the filter device 1805 in the light source system shown in FIG. 18 . As shown in FIG. 23 , FIG. 23 is a front view of the filter device 2205 in the light source system shown in FIG. 22 . The filter device 2205 includes a first segment 2205A (ie, the second segment on the filter device 1805), which is used to transmit green light and reflect red light; The third section) is used to transmit red light and reflect green light.

The yellow light (that is, the first light) emitted by the yellow light source 2202 is incident on the filter device 2205 at a certain angle, and the light beam reflected by the filter device 2205 is transmitted through the filter 2204 and then exits to the DMD 2211 along the first light channel; The light beam transmitted by the optical filter device 2205 is transmitted by the optical filter 2203 and then exits to the DMD2213 along the second optical channel. The light beam (that is, the second light) emitted by the blue light source 2201A is reflected by the filter 2204 and then exits along the first light channel to the DMD 2211 . The light beam (that is, the fourth light) emitted by the blue light source 2201B is reflected by the filter 2203 and then goes out to the DMD 2213 along the second light channel.

In one modulation cycle T, the first control device turns off the yellow light source 2202 and turns on the blue light sources 2201A and 2201B at the first time t1, and both DMDs 2211 and 2213 are used to modulate blue light. In the later time t2, the first control device turns on the yellow light source 2202 and turns off the blue light sources 2201A and 2201B, when at least part of the first section 2205A and the second section 2205B are sequentially located on the outgoing light path of the yellow light. The DMD 2211 is used for modulating the red light and the green light sequentially emitted along the first optical channel, and the DMD 2213 is used for modulating the green light and red light sequentially emitted along the second optical channel.

In this embodiment, the light intensity of the blue light modulated in the two DMDs can be controlled separately to better meet actual needs. Moreover, the time lengths of the two blue lights can also be inconsistent. One of the blue light sources can be turned on during a part of the time period when the other blue light source is turned on. The specific length of time can be determined according to the amount of blue light required by the corresponding DMD. Decide. In the same way, in order to adjust the amount of green light and red light used for modulation, the yellow light when the first section 2205A and the second section 2205B are respectively located on the outgoing light path of the yellow light (that is, the first light) can be controlled accordingly. lighting time. It is easy to understand that one of the blue light sources can also be replaced by a light emitting element of other colors, such as a cyan light emitting element, and correspondingly one of the DMDs is used to modulate the sequential blue light, red light and green light.

It can be understood that the optical filters 2203 and 2204 in the light splitting system in this embodiment are not necessary, and the two optical filters can be omitted by changing the optical path structure of the light source system. For example, each segment on the filter device 2205 is also set to transmit the second light and the fourth light (both blue light in this embodiment), and the light sources 2201A and 2201B are respectively located on both sides of the filter device 2205, so that The light emitted by the light source 2201A is transmitted by the filter device 2205 and then directly enters the DMD 2211 , and the light emitted by the light source 2201B is transmitted by the filter device 2205 and then directly enters the DMD 2213 .

Embodiment Fourteen

Please refer to FIG. 24 . FIG. 24 is a schematic diagram of a light source of another embodiment of the light source system of the present invention. In this embodiment, the light source system 2400 includes a light emitting device, a light splitting system, a first spatial light modulator 2411 and a second spatial light modulator 2413 .

The light emitting device is used for sequentially emitting the first light, the second light and the third light. Specifically, for example, the light emitting device includes a yellow light source 2402A, a blue light source 2401 and a yellow light source 2402B, which are respectively used to generate yellow light 22A, blue light 11 and yellow light 22B, that is, first light, second light and third light; It also includes a first control device 2403 for controlling the three light sources so that the light emitting device sequentially emits yellow light 22A, blue light 11 and yellow light 22B.

The light splitting system is used to divide the second light from the light-emitting device into the first sub-light and the second sub-light emitted along the first light channel and the second light channel, and is also used to divide the third light from the light-emitting device into the first sub-light along the first light channel. The fifth-range wavelength light and the sixth-range wavelength light emitted by the optical channel and the second optical channel. Specifically, for example, the spectroscopic system includes optical filters 2404 and 2405 . The filter curve of the filter 2405 is set to transmit the green light component of the yellow light, that is, the second range of wavelength light of the first light and the fifth range of wavelength light of the third light, and reflect the red light component, that is, of the first light. The first range of wavelength light and the sixth range of wavelength light of the third light; part of the blue light is reflected and part of the blue light is transmitted, the blue light of the transmitted part corresponds to the second sub-light, and the blue light of the reflected part corresponds to the first sub-light. Filter 2404 is used to transmit blue light and reflect yellow light. The light generated by the blue light source 2401 and the yellow light 2402A is incident from both sides of the filter 2404 respectively, and is incident on the same side of the filter 2405 from the same light channel after being transmitted and reflected by the filter 2404 respectively. The light generated by the yellow light source 2402B is incident from the other side of the filter 2405 . The light transmitted by the optical filter 2405 exits to the DMD 2411 along the first optical channel, and the light reflected by the optical filter 2405 exits to the DMD 2413 along the second optical channel.

The first spatial light modulator (that is, the DMD 2411 ) is used to modulate the light of the first range of wavelengths, the first sub-light and the light of the fifth range of wavelengths sequentially emitted by the optical splitting system along the first optical channel. The second spatial light modulator (that is, the DMD 2413 ) is used to modulate the second-range wavelength light, the second sub-light and the sixth-range wavelength light sequentially emitted by the optical splitting system along the second optical channel.

As shown in FIG. 25 , FIG. 25 is a lighting timing diagram of three light sources and a modulation timing diagram of two DMDs of the light source system shown in FIG. 24 . In one modulation period T, the blue light source 2401 is turned on during the first t1 time, and the two yellow light sources are not working, so the two DMDs are used to modulate the blue light. In the next t2 time, the yellow light source 2402B is turned on, and the other two light sources are not working, so DMD2411 is used to modulate green light, and DMD2413 is used to modulate red light. In the next t3 time, the yellow light source 2402A is turned on, and the other two light sources are not working, then the DMD2411 is used to modulate the red light, and the DMD2413 is used to modulate the green light. In this way, the two DMDs can respectively modulate the time-sequenced three primary color lights.

In this embodiment, a time period t4 can also be added in one modulation period T, during which time, three light sources are turned on at the same time, and then two DMDs are used to modulate the combined light of blue light and yellow light, that is, white light. In this way, the brightness of the light source system can be improved. In this embodiment, the ratios of t1, t2, t3 and t4 can be adjusted according to the actual ratio requirements of different colors.

Compared with the above embodiment, in this embodiment, the brightness of the red light and the green light received by the two DMDs can be adjusted respectively by separately controlling the brightness of the two yellow light sources, and the number of steps for driving the filter device is reduced. 2. The use of the driving device; at the same time, since the lighting of the light source does not need to be synchronized with the rotation of the filter device, it is easier to control the sequential lighting of different light sources, and it is also more convenient to adjust the amount of light modulation by the DMD to different colors.

It is easy to understand that one of the yellow light sources in this embodiment can also be replaced by a light emitting element of a third color. Correspondingly, the filter curve of the optical filter 2405 for light splitting is also set to transmit light in one wavelength range of the third color light and reflect light in another wavelength range of the third color light.

In this embodiment, the light-emitting device can also generate three beams of time-sequential light by exciting the rotating color wheel with excitation light, and the three beams of time-sequential light can also be processed by a filter wheel that rotates simultaneously with the color wheel in the spectroscopic system. splitting to achieve. These devices have been described in the above embodiments, and it is only necessary to simply combine the light emitting device and the light splitting system in different embodiments, which will not be repeated here.

Embodiment 15

Please refer to FIG. 26 . FIG. 26 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention. In this embodiment, the light source system 2600 includes a light emitting device, a light splitting system, a first spatial light modulator 2611 and a second spatial light modulator 2613 . The light emitting device includes blue light sources 2601A and 2601B, yellow light sources 2602A and 2602B, and a first control device 2603 . The spectroscopic system includes optical filters 2604 and 2605.

The differences between this embodiment and the embodiment shown in Figure 24 include:

The light emitting device in this embodiment further includes a blue light source 2601B, and a blue light source 2601A respectively provides blue light for two DMDs.

Compared with the optical filter 2605 used to split the light beams generated by the two yellow light sources in the light source system shown in Figure 24, the optical filter used to split the light beams generated by the two yellow light sources in this embodiment 2605 is set to transmit green light and blue light and reflect red light, and the blue light generated by blue light 2601A is transmitted through filter 2605 and then exits to DMD2613 along the second optical channel. At the same time, the optical filter 2606 is located on the outgoing light path of the light beam reflected by the optical filter 2605, and is used for transmitting blue light and reflecting other light. The sequential red and green light reflected by the filter 2605 is reflected by the filter 2606 and then exits to the DMD 2611 along the first optical channel. The blue light source 2601B transmits through the optical filter 2606 and then exits to the DMD 2611 along the first optical channel.

As shown in FIG. 27 , FIG. 27 is a light emitting timing diagram of four light sources and a modulation timing diagram of two DMDs in the light source system shown in FIG. 26 . In one modulation cycle T, in the first time t1, the first control device controls the two blue light sources to turn on, and the two yellow light sources do not work, so the two DMDs are used to modulate the blue light. In the next t2 time, the yellow light source 2602B is turned on, and the other three light sources are not working, then the DMD2611 is used to modulate the green light, and the DMD2613 is used to modulate the red light. In the next t3 time, the yellow light source 2602A is turned on, and the other three light sources are not working, then the DMD2611 is used to modulate the red light, and the DMD2613 is used to modulate the green light. In this way, the two DMDs can respectively modulate the time-sequenced three primary color lights.

It is easy to understand that one of the blue light sources can also be turned on only during a part of the time period t1, and the specific length of the turned on time can be controlled according to the amount of blue light actually required.

Preferably, within one modulation period T, a time period t4 may also be added, during which time the four light sources are turned on simultaneously, and then both DMDs are used to modulate the combined light of blue light and yellow light, that is, white light. In this way, the brightness of the light source can be increased. In this embodiment, the ratios of t1, t2, t3 and t4 can be adjusted according to the actual ratio requirements of different colors.

Compared with the light source system shown in FIG. 24 , two blue light sources are used in this embodiment, and the light intensity and modulation time of the blue light modulated in the two DMDs can be controlled respectively, so as to better meet actual needs.

In the above embodiments, the filtering curve of each filter, the timing control of each light source, the modulation timing of the DMD, and the specific optical path structure are not limited to the above examples, and those skilled in the art can make specific designs according to the present invention.

Embodiment sixteen

Please refer to FIG. 28 . FIG. 28 is a schematic diagram of a light emitting source of another embodiment of the light source system of the present invention. In this embodiment, the light source system includes a light emitting device, a light splitting system, a first spatial light modulator 2811 and a second spatial light modulator 2813 . The light emitting device includes excitation light sources 2801 and 2802, a wavelength conversion layer 2805, a first driving device 2806 and a first control device (not shown). The spectroscopic system includes a filter 2814 and a mirror 2812 .

The differences between this embodiment and the embodiment shown in Figure 24 include:

In the light source system shown in FIG. 24 , the light emitting device generates time-sequential light by sequentially lighting four light sources. However, the light-emitting device in this embodiment generates time-sequential light by combining a color wheel and sequentially lighting the light sources. The details are as follows.

The wavelength conversion layer 2805 includes a first subsection 2805A, a second subsection 2805B, a third subsection 2805C and a fourth subsection 2805D, respectively provided with first, second, third and fourth functional materials for absorbing excitation light and Generate the first, second, third, and fourth light. In this embodiment, the two excitation light sources are both UV light, yellow light wavelength conversion materials are provided on the first and third subregions, and blue light wavelength conversion materials are provided on the second and fourth subregions. In the same time period, the first division and the third division are respectively located on the outgoing light paths of the excitation light generated by the two excitation light sources, and in another time period, the second division and the fourth division are respectively located on the excitation light generated by the two excitation light sources. on the outgoing light path.

The first driving device 2806 is used to drive the wavelength conversion layer 2805, so that the light spot formed by the excitation light on the wavelength conversion layer 2805 acts on the wavelength conversion layer 2805 according to a predetermined path. At the same time, the first control device is used to control the two excitation light sources, so that when the first subregion 2805A and the third subregion 2805C are located on the optical path of the two excitation lights, at least part of the time periods are alternately lit, and when the second subregion 2805B and the fourth When the partition 2805D is located on the optical path of the two excitation lights, at least part of the time period is turned on simultaneously.

The following are specific examples to illustrate. As shown in FIG. 29 , FIG. 29 is an embodiment of the front view of the wavelength conversion layer in the light source system shown in FIG. 28 . In this embodiment, the wavelength conversion layer 2805 is disc-shaped, and the first partition 2805A and the third partition 2805C are arranged at 180 degrees, and the second partition 2805B and the fourth partition 2805D are arranged at 180 degrees. The first driving device 280 is a motor, which is used to drive the wavelength conversion layer to rotate periodically. The lines connecting the light spots formed by the two excitation lights on the wavelength conversion layer 2805 respectively pass through the center of the disc, so that the partitions set at 180 degrees at the same time are respectively located on the outgoing light paths of the excitation lights generated by the two excitation light sources.

In this embodiment, the wavelength conversion layer 2805 is configured as reflective, that is, the optical paths of the exciting light and the receiving light are located on the same side of the wavelength conversion layer 2805 . It can be realized by placing a reflective mirror or coating a reflective film on the side of the wavelength conversion layer 2805 facing away from the excitation light source, which is a known technology and will not be repeated here.

Two reflectors 2803 and 2804 are arranged on the exit light path of the wavelength conversion layer 2805, which are respectively used to collect the stimulated light generated by the excitation light source 2801 and the excitation light source 2802 to excite the wavelength conversion layer. By laser. Each of the two reflectors is provided with a through hole for transmitting the excitation light generated by the corresponding excitation light source. The two reflectors use the difference in the etendue of the excitation light and the subject light to distinguish the light paths of the excitation light and the subject light. It is easy to understand that when the wavelength conversion layer is transmissive, that is, the optical path of the exciting light and the optical path of the receiving light are respectively located on both sides of the wavelength conversion layer, there is no need to use a reflective cover. However, in this embodiment, a reflective wavelength conversion layer and a reflective cover are used, which can reduce the loss of light beams and improve the utilization rate of light beams.

The light splitting system is used to divide the first light and the third light into two beams of light with different wavelength ranges that are emitted along the first optical channel and the second optical channel, and respectively emit the second light and the second light along the first optical channel and the second optical channel. fourth light. In this embodiment, the mirror 2812 is located on the outgoing light path of the second received light, and the first received light and the second received light reflected by the mirror 2812 are respectively incident on both sides of the filter 2814 . The filter 2814 is used to reflect the green light component in the yellow light (ie, the first light and the third light) and transmit the red light component, and is also used to reflect the blue light (ie, the second light and the fourth light) along the first light channel and the second optical channel exits. The DMD 2811 is used for modulating the light beam emitted along the first optical channel through the optical filter 2814 . The DMD 2813 is used for modulating the light beam emitted along the second optical channel through the optical filter 2814 .

Preferably, the first received light is collected by the reflector 2803 and then enters the dodging device 2807 for dodging and the collecting lens 2810 and then exits to the filter 2814 . Similarly, the second received light is collected by the reflector 2804 and then enters the dodging device 2808 for dodging and the collecting lens 2809 and then exits to the filter 2814 . In this way, the utilization rate of the first receiving light and the second receiving light can be improved, and light loss can be reduced.

As shown in FIG. 30 , FIG. 30 is a working timing diagram of the light source system shown in FIG. 28 . The details are as follows. In one cycle T of the rotation of the wavelength conversion layer 2805, when the second subregion 2805B and the fourth subregion 2805D are respectively located on the optical paths of the two excitation lights, the first control device controls the two excitation light sources to light up, and the two DMDs simultaneously Receive the blue light reflected by the optical filter 2814; when the first sub-area 2805A and the third sub-area 2805C are respectively located on the optical path of the two beams of excitation light, within the first time t1, the first control device controls the excitation light source 2802 to light up, and the excitation light source 2801 is turned off, DMD2813 receives green light, and DMD 2811 receives red light; within the time t2 later, the first control device controls the excitation light source 2801 to light up, and the excitation light source 2802 is turned off, then DMD2813 receives red light, and DMD2811 receives green light. Light.

Preferably, when the first subregion 2805A and the second subregion 2805C are respectively located on the optical paths of the two beams of excitation light, during a part of the time period t3, the first control device controls the excitation light sources 2801 and 2802 to light up simultaneously, then the two DMDs At the same time, the combined light of red light and green light is received, that is, yellow light. This results in increased brightness of the light source system.

In this embodiment, when the second subregion 2805B and the fourth subregion 2805D are respectively located on the optical paths of the two excitation lights, the working time of the two excitation lights can be adjusted to adjust the blue light received by the two DMDs respectively. amount, and then adjust the color of the image emitted by the final light source system. In the same way, when the first sub-area 2805A and the third sub-area 2805C are located on the optical paths of the two excitation lights, respectively, the length of the working time of the two excitation lights can be adjusted, so as to adjust the time sequence red light received by the two DMDs respectively. , the amount of green light.

In this embodiment, the two excitation light sources may also be blue light sources, and both the second subsection 2805B and the fourth subsection 2805D are provided with reflective areas for reflecting blue light. When the excitation light source is a laser light source, preferably, the second partition 2805B and the fourth partition 2805D are further provided with scattering materials for decohering the blue light.

In this embodiment, the first, second, third, and fourth lights can also be lights of different colors, and the spectra of the four beams of light can be determined according to the lights that the two DMDs need to modulate respectively and used to convert the first light and the filtering curve of the filter for the third light splitter.

Embodiment 17

Please refer to FIG. 31 . FIG. 31 is a schematic diagram of a light emitting source in another embodiment of the light source system of the present invention. In this embodiment, the light source system includes a light emitting device, a light splitting system, a first spatial light modulator 3111 and a second spatial light modulator 3113 . The light emitting device includes excitation light sources 3101 and 3102, a wavelength conversion layer 3105, a first driving device 3106 and a first control device (not shown). The spectroscopic system includes a filter 3109, mirrors 3103 and 3104 with through holes.

The differences between this embodiment and the embodiment shown in Figure 28 include:

In the light source system shown in FIG. 28 , a reflector is placed on the outgoing light path of the wavelength conversion layer 2805 , so that the sequential light emitted by the light emitting device is collected by the reflector and then enters the spectroscopic system. In this embodiment, instead of placing a reflection cover on the outgoing light path of the wavelength conversion layer 3105, a spectroscopic system is placed directly.

The optical filter 3109 in the spectroscopic system is used to transmit the green light component in the yellow light and reflect the red light component in the yellow light, and is also used to transmit the second light and the fourth light (both blue light in this embodiment) respectively. The excitation light generated by the first excitation light source 3101 passes through the through hole on the mirror 3103 and the collimating lens 3108 sequentially, and then enters the wavelength conversion layer 3105 . The first received light emitted from the wavelength conversion layer 3105 is collimated by the collimating lens 3108 and then reflected by the mirror 3103 to the filter 3109 . The excitation light generated by the second excitation light source 3102 passes through the through hole on the mirror 3104 , the filter 3109 and the collimator lens 3107 in sequence, and then enters the wavelength conversion layer 3105 . The second received light emitted from the wavelength conversion layer 3105 is collimated by the collimating lens 3107 and enters the filter 3109 .

A specific example of the working sequence of the light source system shown in FIG. 31 is as follows. During one cycle T of the rotation of the wavelength conversion layer 3105, when the second subregion 2805B and the fourth subregion 2805D are located on the optical path of the two excitation light beams respectively, the first control device controls the two excitation light sources to light up, and the DMD 3113 receives The blue light transmitted by the filter 3109, the DMD 3111 receives the blue light transmitted by the filter 3109 and reflected by the mirror 3104 in turn; Within t1 time, the first control device controls the excitation light source 3101 to turn on, and the excitation light source 3102 is turned off, then the DMD3113 receives red light, and the DMD3111 receives green light; within the latter t2 time, the first control device controls the excitation light source 3102 to light up, When the excitation light source 3101 is turned off, DMD3113 receives green light, and DMD3111 receives red light.

For the convenience of description, in the above embodiments, the first light and the third light are yellow light, and the second light and the fourth light are blue light as examples for illustration. In practical applications, the four beams of light may also be lights of other colors, and are not limited to the ones described above. Correspondingly, the filter curves of the optical filters or filter devices in the spectroscopic system are also specifically designed according to the specific colors of the four beams of light.

In the above embodiments, in the filter devices with wavelength conversion layers of different partitions and different sections, the different regions on the wavelength conversion layer or the filter device may not be distributed around a center of a circle, but arranged in parallel or take other appropriate settings. Correspondingly, the driving device used to drive the wavelength conversion layer or the optical filter device to work can be a linear translation device or adopt other appropriate arrangements, so that the light spots formed by the light beam on the wavelength conversion layer or the optical filter device are respectively along the A straight path or other predetermined path acts on the wavelength converting layer or filter means.

In the above embodiments, the light emitted by two DMDs can be projected into the same display area to form an image, as shown in FIG. 32 , which is a schematic structural diagram of an embodiment of the light source system of the present invention. The light emitted by the two DMDs can also be projected to the two display areas to form two images, as shown in FIG. 33 . Fig. 33 is a schematic structural diagram of another embodiment of the light source system of the present invention.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

An embodiment of the present invention also provides a projection system, including a light source system, and the light source system may have the structures and functions in the above-mentioned embodiments. The projection system may adopt various projection technologies, such as liquid crystal display (LCD, Liquid Crystal Display) projection technology, digital light path processor (DLP, Digital Light Processor) projection technology. In addition, the above-mentioned light-emitting device can also be applied to lighting systems, such as stage lighting.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. A light source system, characterized in that, comprising: a light emitting device for sequentially emitting the first light and the second light; The spectroscopic system includes a first optical filter and a first reflector, the first optical filter is used to sequentially receive the first light and the second light; the first optical filter converts the first light A light is divided into light of a first range of wavelengths emitted along the first optical channel and light of a second range of wavelengths emitted on the first reflector, and the first reflector converts the light of the second range of wavelengths along the second light output through the channel; the first optical filter is also used to output at least part of the second light along the first optical channel. 2. The light source system according to claim 1, wherein the spectroscopic system further comprises a second filter and a third filter; The second optical filter is placed on the first optical channel and is located on the optical path of the second light emitted from the first optical filter; the third optical filter is placed on the second optical channel on and on the outgoing light path of the first reflector; The second optical filter is used to receive the second light, and divide the second light into the third range of wavelength light that continues to exit along the first optical channel and the light that exits on the third optical filter. light in the fourth range of wavelengths, and continue to emit the light in the first range of wavelengths along the first optical channel; The third optical filter is used for emitting the light of the fourth range of wavelengths along the second optical channel, and for emitting the light of the second range of wavelengths along the second optical channel. 3. The light source system according to claim 1 or 2, wherein the light source system further comprises: a first spatial light modulator, configured to modulate the light emitted by the spectroscopic system along the first optical channel; The second spatial light modulator is configured to modulate the light emitted by the light splitting system along the second optical channel. 4. The light source system according to claim 3, further comprising: a second reflector and a fourth filter; The second reflector is placed on the outgoing light path of the first spatial light modulator, and is used to reflect the light modulated by the first spatial light modulator to the fourth filter; The fourth optical filter is placed on the outgoing light path of the second spatial light modulator, and is used for converging the light emitted by the second spatial light modulator and the light reflected by the second reflector into one beam light emerges. 5. The light source system according to claim 1, wherein the light emitting device comprises: a light source for generating excitation light; a wavelength conversion device comprising a first subsection and a second subsection; a first driving device, configured to drive the wavelength conversion device, so that the first subregion and the second subregion are periodically located on the optical path of the excitation light; in: The light source is used to generate UV light, the first partition is provided with yellow fluorescent powder for absorbing the UV light and generating yellow stimulated light, and the second partition is provided with blue fluorescent powder for absorbing Said UV light and produce blue stimulated light; Alternatively, the light source is used to generate blue excitation light, the first subregion is provided with yellow fluorescent powder for absorbing the blue excitation light and generating yellow subject light, and the second subregion is set as a light-transmitting region , for transmitting the blue excitation light. 6. The light source system according to claim 1, wherein the light emitting device comprises: a first light emitting device for generating first light; a second light emitting device for generating second light; A first control device, configured to alternately light up the first light-emitting device and the second light-emitting device for at least part of the time period, so as to emit sequential first light and second light; Wherein, the first light-emitting device is a yellow LED or a laser that generates yellow light, and the second light-emitting device is a blue LED or a laser that generates blue light. 7. The light source system according to claim 1, wherein the first range of wavelength light is green light, and the second range of wavelength light is red light. 8. The light source system according to claim 2, wherein the first light is yellow light, the second light is first blue light, the first range of wavelength light is first green light, and the The second range of wavelength light is second blue light, the third range of wavelength light is second green light, and the fourth range of wavelength light is red light. 9. The light source system according to claim 2, wherein the first filter transmits the light of the first range of wavelengths and reflects the light of the second range of wavelengths; The second filter transmits light in the third range of wavelengths and the light in the first range of wavelengths, and reflects light in the fourth range of wavelengths; The third filter reflects light in the fourth range of wavelengths and transmits light in the second range of wavelengths. 10. A projection system, characterized by comprising the light source system according to any one of claims 1-10.