CN108931879B

CN108931879B - Light source system, projection apparatus, and image display control method

Info

Publication number: CN108931879B
Application number: CN201710384708.5A
Authority: CN
Inventors: 郭祖强; 杜鹏; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2024-05-28
Anticipated expiration: 2037-05-26
Also published as: CN108931879A

Abstract

The invention relates to a light source system, a projection device and an image display control method. The light source system comprises an excitation light source, an auxiliary light source and a wavelength conversion device. The excitation light source emits excitation light, the wavelength conversion device comprises a conversion area and a reflection area, and the wavelength conversion device periodically moves to enable the conversion area and the reflection area to be periodically positioned on a light path of the excitation light in a time-sharing manner; the conversion area converts the excitation light into laser light and emits the laser light, and the reflection area reflects the excitation light and emits the laser light; the laser light and the excitation light emitted from the wavelength conversion device are positioned on the same side of the wavelength conversion device but have misaligned optical axes, the laser light and the excitation light emitted from the wavelength conversion device are both guided to the light-emitting channel, the auxiliary light source is used for emitting auxiliary light, the auxiliary light is misaligned with the spectrum of the laser light, and the auxiliary light is also guided to the light-emitting channel.

Description

Light source system, projection apparatus, and image display control method

Technical Field

The invention relates to a light source system, a projection device and an image display control method applicable to the projection device.

Background

At present, laser sources are becoming more and more widely used in the fields of display (such as projection) and illumination, and have gradually replaced bulbs and LED light sources in the field of high-brightness light sources due to the advantages of high energy density and small optical expansion. In this case, a light source system that uses a first light source to excite a fluorescent powder to generate a desired light (such as blue light to excite a yellow fluorescent powder to generate white light or light with a specific color) is the main stream of applications due to the advantages of high light efficiency, good stability, low cost, and the like.

Particularly, in projection technology, the number of spatial modulators is mainly divided into a monolithic system and a three-piece system, in the monolithic system, a light source needs to provide light of three colors of RGB in time sequence for illumination, and finally, a color picture is displayed on a screen. In the three-sheet system, the light source needs to provide a white light source, and split light in the optical machine to respectively irradiate the three spatial modulators, and finally the combined light shows a color picture on the screen. In the three-sheet projection technology using laser as a light source, a white light source generated by exciting yellow fluorescent powder by using blue laser as an excitation light source is the main stream of application due to the advantages of high light efficiency, good stability, low cost and the like.

In the light source system, blue light is transmitted or reflected at the position of the area coating, white light obtained by blue light and yellow light is generated after yellow fluorescent powder is excited, part of the blue light is lost after the collected white light passes through the area coating, and finally, the blue light is lack in the center of the formed white light in the beam angle direction, so that the quality of the light beam is influenced in application. Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a light source system 100 in the prior art, and fig. 2 is a schematic structural diagram of a regional beam splitter 106 of the light source system 100 shown in fig. 1. The light source system comprises an excitation light source 101, a light homogenizing device 103, a regional beam splitter 106, a collecting lens 104, a scattering powder sheet 105, a relay lens 107 and a square rod 108.

Specifically, the excitation light source 101 is generally a blue laser light source, and after the excitation light beam is homogenized by the homogenizing device 103, the excitation light beam passes through the regional beam splitter 106, as shown in fig. 2, a film coating in a central region of the regional beam splitter 106 is a blue-transparent film coating, and a reflector is arranged outside the region. The excitation light is collected by the collecting lens 104 and then enters the scattering powder sheet 105, the excitation light is scattered by the scattering powder sheet 105 and then reflected in a lambertian light form, about 5% of self-absorption loss of the scattering powder sheet exists in the scattering process, the reflected excitation light is collected by the collecting lens 104 and then exits, and the size of the collecting lens 104 is limited, so that the lambertian light cannot be completely collected, and 5% -10% of loss exists. The excitation light is further reflected at the regional beam splitter 106, and the excitation light is transmitted at the central region and loses 8% -10% of the energy (i.e., regional loss), resulting in lower light utilization of the light source system 100. Further, the image is formed to the entrance of the square bar 108 through the relay lens 107, and finally, the image is emitted from the exit of the square bar 108. Since the blue excitation light is absent from the central portion of the light beam incident on the square bar 108 due to the above-described region loss, there is a phenomenon that the color of the light emitted from the exit of the square bar 108 is not uniform. As described above, in the conventional light source system 100, the utilization ratio of the excitation light (i.e., blue light) is low, and there are a loss of self-absorption, a loss of collection efficiency, and a loss of the area plating film of the scattering powder sheet 105, and the area plating film loss affects the uniformity of the light source system.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a light source system and a projection apparatus that can improve the foregoing, and to provide an image display control method that can be used in the projection apparatus.

A light source system comprises an excitation light source, an auxiliary light source and a wavelength conversion device. The excitation light source is used for emitting excitation light, the wavelength conversion device comprises a conversion area and a reflection area, and the wavelength conversion device periodically moves so that the conversion area and the reflection area are periodically positioned on the light path of the excitation light in a time-sharing manner; the conversion area is used for converting the excitation light into laser light and emitting the laser light, and the reflection area is used for reflecting the excitation light and emitting the laser light; the laser light and the excitation light emitted from the wavelength conversion device are positioned on the same side of the wavelength conversion device but have misaligned optical axes, the laser light and the excitation light emitted from the wavelength conversion device are both guided to the light-emitting channel, the auxiliary light source is used for emitting auxiliary light, the auxiliary light is misaligned with the spectrum of the laser light, and the auxiliary light is also guided to the light-emitting channel.

A projection device includes a light source system including an excitation light source, an auxiliary light source, and a wavelength conversion device. The excitation light source is used for emitting excitation light, the wavelength conversion device comprises a conversion area and a reflection area, and the wavelength conversion device periodically moves so that the conversion area and the reflection area are periodically positioned on the light path of the excitation light in a time-sharing manner; the conversion area is used for converting the excitation light into laser light and emitting the laser light, and the reflection area is used for reflecting the excitation light and emitting the laser light; the laser light and the excitation light emitted from the wavelength conversion device are positioned on the same side of the wavelength conversion device but have misaligned optical axes, the laser light and the excitation light emitted from the wavelength conversion device are both guided to the light-emitting channel, the auxiliary light source is used for emitting auxiliary light, the auxiliary light is misaligned with the spectrum of the laser light, and the auxiliary light is also guided to the light-emitting channel.

A projection device includes a light source system including an excitation light source, an infrared light source, and a wavelength conversion device. The light source system comprises an excitation light source, an auxiliary light source and a wavelength conversion device. The excitation light source is used for emitting excitation light, the wavelength conversion device comprises a conversion area and a reflection area, and the wavelength conversion device periodically moves so that the conversion area and the reflection area are periodically positioned on the light path of the excitation light in a time-sharing manner; the conversion area is used for converting the excitation light into laser light and emitting the laser light, and the reflection area is used for reflecting the excitation light and emitting the laser light; the laser light and the excitation light emitted from the wavelength conversion device are located on the same side of the wavelength conversion device but have misaligned optical axes, the laser light and the excitation light emitted from the wavelength conversion device are both guided to the light-emitting channel, the infrared light source is used for emitting infrared light, the infrared light is used for modulating an infrared image, the infrared light is misaligned with the spectrum of the laser light, and the infrared light is also guided to the light-emitting channel.

An image display control method, comprising the steps of:

Receiving image data, generating an image display data signal based on the image data;

providing first color light, second color light, third color light and infrared light;

Image modulating the first color light based on an image display data signal to produce a first color image light;

image modulating the second color light based on an image display data signal to produce a second color image light;

image modulating the third color light based on an image display data signal to produce third color image light; and

Image modulating the infrared light based on the image display data signal produces infrared image light.

Further, the first, second and third colors are respectively red, green and blue three primary colors.

Further, the method comprises the following steps:

Providing fourth color light, and performing image modulation on the fourth color light based on an image display data signal to generate fourth color image light.

Further, in the image display control method, the image display data signal includes a first color data signal, a second color data signal, a third color data signal, and a fourth color data signal, wherein in the method, the first color data signal is used for performing image modulation on the first color light to generate a first color image light, the second color data signal is used for performing image modulation on the second color light to generate a second color image light, the third color data signal is used for performing image modulation on the third color light to generate a third color image light, the fourth color data signal is used for performing image modulation on the fourth color light to generate a fourth color image light, and at least one of the four color data signals is used for performing image modulation on the infrared light to generate an infrared image light.

Further, in the image display control method, the modulation period for performing one frame of image includes four different time periods, which are a first sub-frame image modulation period, a second sub-frame image modulation period, a third sub-frame image modulation period, and a fourth sub-frame image modulation period, respectively, in the method, in the first sub-frame image modulation period, the second color light is subjected to image modulation based on the second color data signal to generate a second color image light, in the second sub-frame image modulation period, the fourth color light is subjected to image modulation based on the fourth color data signal to generate a fourth color image light, in the third sub-frame image modulation period, the third color light is subjected to image modulation based on the third color data signal to generate a third color image light, and in the fourth sub-frame image modulation period, the first color light and the infrared light are subjected to image modulation based on the first color data signal to generate a first color image light and an infrared image light.

Further, in the image display control method, the image display data signal includes a first color data signal, a second color data signal, a third color data signal, and an infrared data signal, wherein in the method, the first color data signal is used for performing image modulation on the first color light to generate a first color image light, the second color data signal is used for performing image modulation on the second color light to generate a second color image light, the third color data signal is used for performing image modulation on the third color light to generate a third color image light, and the infrared data signal is used for performing image modulation on the infrared light to generate an infrared image light.

Further, the method further comprises: the image data is decoded to obtain the first to third color data signals, and one of the first to third color data signals is used as the infrared data signal.

Further, the method further comprises: the first color data signal is taken as the infrared data signal.

Further, in the image display control method, the modulation period for performing one frame of image includes four different time periods, which are a first sub-frame image modulation period, a second sub-frame image modulation period, a third sub-frame image modulation period, and a fourth sub-frame image modulation period, respectively, wherein in the method, the second color light is subjected to image modulation based on the second color data signal in the first sub-frame image modulation period to generate the second color image light, the infrared light is subjected to image modulation based on the infrared data signal in the second sub-frame image modulation period to generate the infrared image light, the third color light is subjected to image modulation based on the third color data signal in the third sub-frame image modulation period to generate the third color image light, and the first color light is subjected to image modulation based on the first color data signal in the fourth sub-frame image modulation period to generate the first color image light.

Further, the method further comprises: providing a first modulation module and a second modulation module, performing image modulation on the first color light and the second color light by using the first modulation module, and performing image modulation on the third color light and the infrared light by using the second modulation module.

Further, the method further comprises:

decoding the image data to obtain the first color data signal, the second color data signal and the third color data signal, calculating an infrared data signal based on the first to third color data signals, setting a signal value of any one pixel in the first to third data signals as A, B, C, and setting an infrared data signal value ir= (a+b+c+c)/Y _max of any one pixel, wherein a, B and C represent brightness of the first, second and third color light, and Y _max =a+b+c.

Further, in the image display control method, the modulation period for performing one frame of image includes three different time periods, namely a first sub-frame image modulation period, a second sub-frame image modulation period and a third sub-frame image modulation period, in the method, the second sub-frame image modulation period is used for performing image modulation on the second color light based on the second color data signal to generate second color image light, the third sub-frame image modulation period is used for performing image modulation on the third color light based on the third color data signal to generate third color image light, the first sub-frame image modulation period is used for performing image modulation on the first color light based on the first color data signal to generate first color image light, and the light modulation module is used for performing image modulation on the infrared light based on the infrared data signals in the first sub-frame image modulation period, the second sub-frame image modulation period and the third sub-frame image modulation period to generate infrared image light.

Further, in the image display control method, in the method, the image data is decoded to obtain the first color data signal, the second color data signal and the third color data signal, an infrared data signal is calculated based on the first to third color data signals, a signal value of any pixel in the first to third data signals is A, B, C, the brightness of the first color light, the brightness of the second color light and the brightness of the third color light are respectively a, b and c, and the brightness of the infrared light in the three sub-frame image modulation periods is controlled to be d, e and f, respectively, wherein d=α×a; e=α×b; f=α×c, that is, the luminance of the infrared light in the three sub-frame image modulation periods is α times the luminance of the first to third color lights, respectively.

Further, in the image display control method, the luminance of the infrared light in the first, second and third sub-frame image modulation periods is L1, L2 and L3, respectively, and L3< L1< L2.

Further, in the image display control method, the first color light, the second color light, the third color light and the infrared light are provided by a light source system, the light source system comprises an excitation light source, an infrared light source, a wavelength conversion device and a region beam splitting device, the region beam splitting device comprises a first region and a second region, the wavelength conversion device comprises a reflection region and a conversion region, wherein:

the excitation light source is used for emitting excitation light, a first area of the area light splitting device guides the excitation light to the reflection area and the conversion area, wherein the excitation light is obliquely incident to the reflection area along a preset angle, and the excitation light comprises a first part of excitation light incident to the reflection area and a second part of excitation light incident to the conversion area;

the reflection area reflects the first part of excitation light to a second area of the area light splitting device, and the second area of the area light splitting device is used for guiding the first part of excitation light to a light outlet channel; and

The conversion area converts the second part of excitation light into lasing light and reflects the lasing light, the lasing light is guided to the light-emitting channel, the light path channel of the lasing light in the light-emitting channel surrounds the light path channel of the first part of excitation light in the light-emitting channel, the infrared light source is used for emitting the infrared light, the infrared light is guided to the light-emitting channel, the lasing light comprises first lasing light and second lasing light which are different in color, and the first part of excitation light, the first lasing light and the second lasing light in the light-emitting channel are respectively used as the first color light, the second color light and the third color light.

Further, in the image display control method, an optical path channel of the infrared light in the light-emitting channel coincides with an optical path channel of the first part of excitation light in the light-emitting channel.

Compared with the prior art, in the light source system, the laser light emitted from the wavelength conversion device and the excitation light are positioned on the same side of the wavelength conversion device but the optical axes are not coincident, namely, the light path of the excitation light is offset compared with the incident light path after being reflected by the reflection area, so that the area where the excitation light returns from the wavelength conversion device is different from the incident area of the excitation light, and further, the loss generated in the incident area can be avoided under the condition that no additional element is added, the light utilization rate of the light source system is improved, and the uneven light emission caused by the loss of a coating position of the area is reduced.

Further, in the light source system, the projection device and the image display control method, auxiliary light is further provided, the auxiliary light is not overlapped with the spectrum of the laser and is used for the functions of infrared image modulation or ultraviolet light exposure and the like, the functions of the projection device using the light source system are increased, and the user experience is improved.

Drawings

Fig. 1 is a schematic diagram of a prior art light source system.

Fig. 2 is a schematic structural view of a regional beam splitter of the light source system shown in fig. 1.

Fig. 3 is a schematic view of the structure of a light source system according to the first embodiment of the present invention.

Fig. 4 is a schematic plan view of a region beam splitting device of the light source system shown in fig. 3.

Fig. 5 is a schematic structural diagram of a wavelength conversion device and a scattering device of the light source system shown in fig. 3.

Fig. 6 is a timing diagram of the light emission of the light source system of fig. 3.

Fig. 7 is a schematic structural view of a projection apparatus according to a first embodiment of the present invention.

Fig. 8 is a flowchart of an image display control method of the projection apparatus shown in fig. 7.

Fig. 9 is a schematic diagram of the wavelength conversion device and the scattering device of the light source system according to the second embodiment of the present invention.

Fig. 10 is a light emission timing chart of a light source system according to a second embodiment of the present invention.

Fig. 11 is a schematic structural view of a projection apparatus according to a second embodiment of the present invention.

Fig. 12 is a schematic structural view of a projection apparatus according to a third embodiment of the present invention.

Fig. 13 is a schematic structural view of a projection apparatus according to a fourth embodiment of the present invention.

Fig. 14 is a schematic view of the structure of a light source system of a projection apparatus according to a fifth embodiment of the present invention.

Fig. 15 is an enlarged schematic view of a portion of the light source system of fig. 14.

Fig. 16 is a schematic structural view of a light source system of a projection apparatus according to a sixth embodiment of the present invention.

Fig. 17 is a schematic diagram of the structure of a light source system of a projection apparatus according to a seventh embodiment of the present invention.

Fig. 18 is a schematic structural view of a light source system of a projection apparatus according to an eighth embodiment of the present invention.

Fig. 19 is a schematic view of a structure of a light source system of a projection apparatus according to a ninth embodiment of the present invention.

Fig. 20 is a schematic structural view of a light source system of a projection apparatus according to a tenth embodiment of the present invention.

Fig. 21 is a schematic structural view of a projection apparatus according to an eleventh embodiment of the present invention.

Fig. 22 is a timing diagram of the light emission of the light source system of the projection device shown in fig. 21.

Description of the main reference signs

Light source system 200, 300, 600, 700, 800, 900, 1000, 1200, 1300

Excitation light source 201

Auxiliary light source 202, 1302

Supplemental light sources 203, 1003, 1203

Light combining device 212

Wavelength conversion devices 207, 307, 607, 707, 807, 1007, 1207

Dodging device 204

Regional beam splitter 205, 705, 805, 905, 1005

Guide 213, 612, 713, 813, 913, 1308

Scattering device 210, 310, 610, 710, 810, 910, 1010

Dodging devices 211, 611, 711, 811, 911, 1111, 1311

Light combining element 212b

First collection system 206a

Second collection system 206b

Third collection system 206c, 1006c

First region 205a

Second region 205b

Third region 205c, 1205c

Reflective regions 215, 615

First reflective region 315a

Second reflective region 315b

Reflective surface 615c

Conversion region 214

First transition areas 214a, 314a

Second transition regions 214b, 314b

Third transition region 214c

Scattering region 217

First scattering region 317a

Second scattering region 317b

First filter regions 218a, 318a

Second filter region 218b, 318b

Third filter region 218c

Light exit channel 216, 1116

Mirrors 209, 709, 809, 909, 1009

The light splitting sheets 208, 708, 808, 908, 1008

First light exit channels 216a, 616a, 716a, 816a, 916a, 1316a

Second light exit channels 216b, 616b, 716b, 816b, 916b, 1316b

Projection device 220, 320, 420, 520, 1320

Data processing module 230, 1330

Light modulation modules 240, 340, 440, 540, 1340

Projection lens 250

Signal receiving unit 231

Signal decoding unit 232, 532

Fusion device 233

Controllers 242, 342, 442

Modulators 243, 343, 443

Steps S1, S2, S3, S4, S5, S6, S7

Wavelength conversion period T

Sub-frame image modulation periods T1, T2, T3, T4

First modulation module 441a

Second modulation module 441b

Signal processing unit 534

Guide elements 212a, 1113

First supplemental light source 1203a

Second supplemental light source 1203b

Light source controller 1319

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

Referring to fig. 3, fig. 3 is a schematic diagram of a light source system 200 according to a first embodiment of the invention. The light source system 200 includes an excitation light source 201, an auxiliary light source 202, a supplemental light source 203, a light combining device 212, a wavelength conversion device 207, a light homogenizing device 204, a region splitting device 205, a guiding device 213, a scattering device 210, a light homogenizing device 211, a first collection system 206a, a second collection system 206b, and a third collection system 206c.

The excitation light source 201 is configured to emit excitation light, and the excitation light source 201 may be a semiconductor diode or a semiconductor diode array. The semiconductor diode array may be a Laser Diode (LD) or the like. The excitation light may be blue light, violet light, ultraviolet light, or the like, but is not limited thereto. In this embodiment, the excitation light source 201 is a blue light semiconductor laser diode, and is configured to emit blue laser light as the excitation light.

The auxiliary light source 202 is configured to emit auxiliary light, such as infrared light, and the auxiliary light source 202 may be a semiconductor diode or an array of semiconductor diodes. The semiconductor diode array may be a Laser Diode (LD) or the like. In this embodiment, the auxiliary light source 202 is an infrared light semiconductor laser diode, and is configured to emit an infrared light laser as the infrared light, where the infrared light may be used to modulate an infrared image. In another embodiment, the auxiliary light source 202 may be an ultraviolet light source for emitting ultraviolet light as the auxiliary light, and the ultraviolet light may be used for ultraviolet light exposure.

The light combining device 212 is located on the light path where the excitation light emitted by the excitation light source 201 and the auxiliary light (e.g. infrared light) emitted by the auxiliary light source 202 are located, and is configured to combine the excitation light with the auxiliary light (e.g. infrared light). The light combining device 212 includes a light combining element 212b, the light combining element 212b receives the auxiliary light emitted by the auxiliary light source 202 and the excitation light emitted by the excitation light source 201, transmits one of the auxiliary light and the excitation light, and reflects the other of the auxiliary light and the excitation light to combine the auxiliary light and the excitation light, and the combined auxiliary light and the excitation light are provided to the wavelength conversion device 207, wherein optical paths of the combined auxiliary light and the excitation light overlap.

Specifically, the light combining device 212 further includes a guiding element 212a, the guiding element 212a guides (e.g. reflects) the excitation light emitted by the excitation light source 201 to the light combining element 212b, and the light combining element 218 further receives the infrared light emitted by the auxiliary light source 202, so that the infrared light and the excitation light combine at the light combining element 218. It is understood that the guiding element 212a may be a reflecting element, such as a mirror, and the light combining element 212b may be a light combining film. It is understood that in the modified embodiment, in the light source system 100 and the projection apparatus that do not require infrared light, the auxiliary light source 202 and the light combining device 212 may be omitted.

The light homogenizing device 204 is located on the light path where the excitation light and the infrared light emitted by the light combining device 212 are located, and is configured to homogenize the excitation light and the infrared light emitted by the light combining device 212. It is understood that in alternative embodiments, the light homogenizing device 204 may be omitted.

Referring to fig. 4, fig. 4 is a schematic plan view of the area beam splitter 205 of the light source system 200 shown in fig. 3. The area beam splitting device 205 includes a first area 205a and a second area 205b, the first area 205a is located on an optical path where the excitation light and the infrared light emitted by the light homogenizing device 204 are located, and the first area 205a of the area beam splitting device 205 guides (e.g. transmits) the excitation light to the wavelength conversion device 207, where the excitation light is obliquely incident to the wavelength conversion device 207 along a predetermined angle (e.g. an incident angle of 30 °). Specifically, the area beam splitter 205 may be a beam splitter film (such as a dichroic film), where the beam splitter film is disposed at an angle of approximately 45 degrees with respect to the direction of the excitation light. In a plane, the light splitting membrane may be substantially rectangular, and the second region 205b may be located at an outer periphery of the first region 205a, and in particular, the first region 205a may be located at one side of the region light splitting device 205, and substantially located at a center of the region light splitting device 205 and a center position of one side (such as a following side) of the region light splitting device 205. The first region 205a is a film-coated region that can transmit the excitation light and the infrared light, and the first region 205a can reflect other light with a wavelength longer than that of the excitation light and the infrared light, such as red light, green light, and yellow light. The second region 205b is a film-coated region that can reflect excitation light and other light (e.g., red light, green light, yellow light).

The first collection system 206a is located between the area beam splitter 205 and the wavelength converter 207, and is configured to collect and collect light between the area beam splitter 205 and the wavelength converter 207. In particular, the first collection system 206a may include a collection lens, such as a convex lens. The first collecting system 206a may be disposed adjacent to the wavelength conversion device 207, and the optical paths of the excitation light and the infrared light emitted by the first region 205a are parallel to the optical axis of the first collecting system 206a but have a predetermined distance, so that the excitation light and the infrared light are incident on the wavelength conversion device 207 along the predetermined angle after the first collecting system 206a collects the excitation light and the infrared light.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating a structure of a wavelength conversion device 207 and a scattering device 210 of the light source system 200 shown in fig. 3. The wavelength conversion device 207 includes a reflection area 215 and a conversion area 214, where the reflection area 215 and the conversion area 214 may be segmented areas sequentially arranged in a circumferential direction, and when the light source system 200 works, the wavelength conversion device 207 rotates in the circumferential direction so that the reflection area 215 and the conversion area 214 are sequentially located on an optical path where the excitation light emitted by the first collecting system 206a is located. The excitation light transmitted by the first region 205a may be obliquely incident to the reflection region 213 and the conversion region 214 along the predetermined angle (e.g., a smaller angle: 30 degrees). The excitation light is divided according to the excitation light incident on the different regions, and the excitation light includes a first portion of the excitation light incident on the reflection region 215 and a second portion of the excitation light incident on the conversion region 214. It will be appreciated that, as the wavelength conversion device 207 rotates in the circumferential direction, the first portion of excitation light and the second portion of excitation light are provided to the reflection region 215 and the conversion region 214 in a time-sharing manner.

The reflection area 215 may include a specular reflection surface with a reflective material, so that after the reflection area 215 reflects the first portion of excitation light and the infrared light at a mirror symmetry angle, the optical paths of the first portion of excitation light and the infrared light are offset compared with the incident optical path, and thus the area 205a' (i.e. the second area 205 b) of the first portion of excitation light and the infrared light reflected from the wavelength conversion device 207 back to the area splitting device 205 is different from the incident area (i.e. the first area 205 a) of the excitation light and the infrared light, and further, loss generated in the incident area (i.e. the first area 205 a) can be avoided without adding additional elements, so that the light utilization rate of the light source system 200 is improved.

The conversion region 214 may include a reflective surface provided with a fluorescent material and a scattering powder for receiving the second portion of the excitation light and converting the second portion of the excitation light to lasing and reflecting the lasing light to the wavelength conversion device. In this embodiment, the number of the conversion regions 214 is three, namely, the first conversion region 214a, the second conversion region 214b and the third conversion region 214c, and each conversion region 214 is configured to generate a laser beam of one color, where the laser beam includes a first laser beam, a second laser beam and a third laser beam. Specifically, the first conversion region 214a is provided with a first fluorescent material, such as a red fluorescent material, for receiving the second portion of the excitation light and generating the first lasing (e.g., red lasing). The second conversion region 214b is provided with a second fluorescent material, such as a green fluorescent material, for receiving the second portion of the excitation light and generating the second laser (e.g., green lasing). The third conversion region 214c is provided with a third fluorescent material, such as a yellow fluorescent material, for receiving the second portion of the excitation light and generating the third lasing (e.g., red lasing). In this embodiment, the first conversion region 214a, the second conversion region 214b, the third conversion region 214c, and the reflection region 215 are four segmented regions disposed end to end in the circumferential direction. As described above, the excitation light, the first laser light receiving and the second laser light are respectively red, green and blue light, and the third laser light receiving is a fourth color light, such as yellow light.

The lasing light generated by the conversion area 214 is reflected and emitted in a lambertian light form, that is, is emitted in a larger beam aperture, and the first part of the excitation light and the infrared light reflected by the reflection area 215 are also reflected in a small angle due to the incidence from a small angle, so that the optical path of the lasing light emitted by the conversion area 214 is different from the optical path of the first part of the excitation light and the infrared light emitted by the reflection area 215, wherein the aperture of the optical path of the lasing light is larger and is located at the periphery of the first part of the excitation light and the infrared light. Further, the first portion of the excitation light and the infrared light reflected by the reflective region 215 of the wavelength conversion device 207 are transmitted and collected by the first collecting system 206a and then directed to the second region 205b of the region beam splitting device 205. The second region 205b is a region that reflects the excitation light (e.g., reflects blue light), so the second region 205b directs (e.g., reflects) the first portion of the excitation light reflected by the reflective region 215 of the wavelength conversion device to the light exit channel 216. The laser light emitted from the conversion region 214 of the wavelength conversion device 207 is transmitted and collected by the first collection system 206a and then guided to the region beam splitting device 205, where the laser light is further incident on the periphery of the first portion excitation light and the infrared light incident region of the region beam splitting device 205 due to the large aperture of the optical path of the laser light, and the region beam splitting device 205 further guides (e.g., reflects) the laser light to the light emitting channel 216. The light path channel of the laser in the light emitting channel 216 surrounds the light path channel of the first portion of the excitation light and the infrared light in the light emitting channel 216, so that the space of the light emitting channel 216 of the light source system 200 can be relatively smaller, and the problems that the light source system is large in size and unfavorable for miniaturization and the like due to the large space of the light emitting channel are solved.

In this embodiment, the light-emitting channels 216 include a first light-emitting channel 216a and a second light-emitting channel 216b, the area beam splitter 205 guides (e.g., reflects) the light emitted from the wavelength conversion device 207 to the guiding device 213 via the first light-emitting channel 216a, and the guiding device 213 guides (e.g., reflects) the light in the first light-emitting channel 216a to the second light-emitting channel 216b.

The second collection system 206b may be located in a first light-emitting channel between the area beam splitter 205 and the guiding device 213, and is configured to collect and aggregate the light in the first light-emitting channel 216a and provide the collected light to the guiding device 213. The second collection system 206b may include a collection lens, such as a convex lens.

The guiding device 213 is located on the optical path where the light emitted from the area beam splitter 205 is located, and receives the first part of the excitation light, the infrared light, and the laser light reflected by the area beam splitter 205 via the second collecting system 206 b. Specifically, the guiding device 213 may include a beam splitter 208 and a mirror 209, where the beam splitter 208 receives the received laser light emitted from the area beam splitter 205 through the first light-emitting channel 216a and reflects the laser light to the second light-emitting channel 216b, and the mirror 209 receives the first portion of the excitation light emitted from the area beam splitter 205 through the first light-emitting channel 216a and reflects the first portion of the excitation light to the second light-emitting channel 216b.

In this embodiment, the reflecting surface of the reflecting mirror 209 is convex, the light splitting sheet 208 transmits the first portion of the excitation light in the first light emitting channel 216a to the reflecting mirror 209, the reflecting mirror 209 reflects the first portion of the excitation light and the first portion of the excitation light is transmitted to the second light emitting channel 216b through the light splitting sheet. The convex reflecting surface of the reflecting mirror 209 is used for correcting the optical path length of the first part of excitation light (blue light) and the optical path length of the infrared light, specifically, because the optical path length of the first part of excitation light and the optical path length of the infrared light are different from the optical path length of the excited light (red light, green light and yellow light), the optical path length of the first part of excitation light and the optical path length of the infrared light can be lengthened by arranging the reflecting mirror 209 with the convex reflecting surface, and can be basically the same as the optical path length of the excited light, so that the first part of excitation light and the excited light form an imaging focused spot at the entrance of the light homogenizing device 211, the imaging defocusing of the first part of excitation light is avoided, and the coupling efficiency and the color uniformity of the light homogenizing device 211 are improved.

The scattering device 210 is located on the optical path where the light emitted by the guiding device 213 is located, and is configured to receive the light from the light-emitting channel 216 and scatter the light emitted from the light-emitting channel 216. Specifically, the scattering device 210 may be guided to the scattering device 210 after being collected and converged via the third collection system 206 c. The third collecting system 206c may also include a collecting lens, such as a convex lens, and the third collecting system 206c collects the light emitted from the light-emitting channel 216 to the entrance of the light-homogenizing device 211 via the scattering device 210.

Referring to fig. 5, the scattering device 210 includes a scattering region 217 and a filtering region 218, the scattering region 217 and the filtering region 218 are disposed along a circumferential direction, when the light source system 200 is in operation, the scattering region 217 and the filtering region 218 are alternately located on the light path where the first portion of the excitation light (and the infrared light) emitted from the light-emitting channel 216 and the laser light are located, so that the scattering region 217 scatters the excitation light and the infrared light emitted from the light-emitting channel 216, and the filtering region 218 filters the laser light emitted from the light-emitting channel 216.

In this embodiment, the filtering area 218 includes a first filtering area 218a, a second filtering area 218b, and a third filtering area 218c, where the four segmented areas of the first filtering area 218a, the second filtering area 218b, the third filtering area 218c, and the scattering area 217 are connected in a circumferential direction, the first filtering area 218a is used for filtering the first laser light emitted from the light emitting channel 216, the second filtering area 218b is used for filtering the second laser light emitted from the light emitting channel 216, and the third filtering area 218c is used for filtering the third laser light emitted from the light emitting channel 216. It will be appreciated that the first filtering area 218a may be provided with a first filtering material, such as a red filtering material, for filtering the first laser, so that the light of the first color (such as red light) passes through and enters the light homogenizing device 211. The second filtering area 218b may be provided with a second filtering material, such as a green filtering material, for filtering the second laser, so that light of a second color (such as green light) passes through and enters the light homogenizing device 211. The third filtering area 218c may be provided with a third filtering material, such as a yellow filtering material, for filtering the third laser light, so that light of a third color (such as yellow light) passes through and is incident on the light homogenizing device 211.

In the present embodiment, the scattering device 210 and the wavelength conversion device 207 are integrally formed, and the scattering region 217 and the filtering region 218 are located inside the reflection region 215 and the conversion region 214. The scattering device 210 and the wavelength conversion device 207 are concentrically arranged and may have a same driving shaft located at the center of a circle, so as to drive the scattering device 210 and the wavelength conversion device 207 to rotate along the circumferential direction.

The light homogenizing device 211 is configured to receive the light emitted from the scattering device 210 and perform light homogenizing and light combining on the light emitted from the scattering device 210. The light-homogenizing device 211 may be a square rod, and the first portion of the excitation light collected by the third collecting system 206c and the infrared light are further scattered by the scattering region 217 and then guided to the entrance of the light-homogenizing device 211, and the laser light collected by the third collecting system 206c is further filtered by the filtering region 218 and then guided to the entrance of the light-homogenizing device 211. It can be understood that, based on the above structures of the wavelength conversion device 207 and the scattering device 210, the first portion of excitation light and the infrared light are simultaneously guided to the light homogenizing device 211, and the first portion of excitation light, the first lasing device, the second lasing device and the third lasing device are sequentially guided to the light homogenizing device 211 (i.e., are guided to the light homogenizing device in different periods), and the light homogenizing device 211 combines the first portion of excitation light, the first lasing device, the second lasing device and the third lasing device in a time division multiplexing manner.

In this embodiment, the supplemental light source 203 further emits supplemental light having at least a part of the same color component as the laser light, and is used for supplementing the laser light with a specific color. The supplementary light may be red supplementary light, and the supplementary light source 203 may include a semiconductor diode, which may be a Laser Diode (LD), or an array of semiconductor diodes. In this embodiment, the supplemental light source 203 is a red semiconductor laser diode for emitting red laser light as the supplemental light. It will be appreciated that in a modified embodiment, the supplemental light source 203 may also include a green semiconductor laser diode for emitting green laser light as the supplemental light.

In the area beam splitter 205, the second area 205b further includes a third area 205c, the third area 205c may transmit the supplementary light, the third area 205c may be located at a center of the area beam splitter 205, and the supplementary light emitted by the supplementary light source 203 is guided to the wavelength conversion device 207 via the first collecting system 206a after being transmitted through the third area 205 c. Wherein the optical path of the supplemental light may coincide with the optical axis of the first collection system 206a such that the supplemental light may be incident on the conversion region 214 of the wavelength conversion device 207 without changing direction. Specifically, the supplemental light is guided to the conversion region 214, the conversion region 214 scatters and reflects the supplemental light such that the supplemental light is guided to the region beam splitting device 205 together with the laser light via the first collecting system 206a, and the region beam splitting device 205 further guides (e.g., reflects) the supplemental light together with the laser light to the light-emitting channel 216, wherein an optical path channel of the supplemental light in the light-emitting channel 216 coincides with an optical path channel of the laser light in the light-emitting channel. In this embodiment, the complementary light has the same color as the first laser light, and the complementary light source 203 may be turned on when the first conversion region 214a emits the first laser light, so that the first conversion region 214a guides the generated first laser light and the received complementary light to the region beam splitter 205, and further to the light emitting channel 216 and the scattering device 210.

Referring to fig. 6, fig. 6 is a timing diagram of the light source system 200 shown in fig. 3. As can be seen from the timing chart, the wavelength conversion device 207 sequentially emits the first lasing light, the third lasing light, the second lasing light and the first portion of the excitation light in a wavelength conversion period T (also referred to as a color wheel period), wherein the infrared light is also emitted simultaneously with the first portion of the excitation light, i.e. sequentially emits red light, yellow light, green light and blue light (and infrared light). Specifically, the excitation light source 201 is turned on all the time in the entire wavelength conversion period T, the auxiliary light source 202 may be turned on during a period when the wavelength conversion device 207 emits a first portion of the excitation light, and the supplemental light source 203 may be turned on during a period when the wavelength conversion device emits a first lasing light (i.e., when the wavelength conversion device 207 emits a lasing light having a color component with the supplemental light).

Referring to fig. 7, fig. 7 is a schematic structural diagram of a projection apparatus 220 employing the light source system 200. In addition to the light source system 200, the projection device 220 also includes a data processing module 230, a light modulation module 240, and a projection lens 250. The data processing module 230 is configured to receive image data and generate an image display data signal based on the image data, the light modulation module 240 is configured to image modulate the first portion of excitation light based on the image display data signal to generate a first color image light (e.g., blue image light), to image modulate the first laser light based on the image display data signal to generate a second color image light (e.g., red image light), to image modulate the second laser light based on the image display data signal to generate a third color image light (e.g., green image light), to image modulate the third laser light based on the image display data signal to generate a fourth color image light (e.g., yellow image light), and to image modulate the infrared light based on the image display data signal to generate infrared image light. As mentioned above, the first color, the second color and the third color are respectively red, green and blue primary colors, and the fourth color is yellow. The projection lens 250 is configured to receive the first color image light, the second color image light, the third color image light, the fourth color image light, and the infrared image light and perform projection display of the image.

Specifically, the data processing module 230 may include a signal receiving unit 231, a signal decoding unit 232, and a combiner 233, where the signal receiving unit 231, the signal decoding unit 232, and the combiner 233 are electrically connected in sequence, the signal receiving unit 231 receives image data to be displayed and sequentially provides the image data to be displayed to the signal decoding unit 232, the signal decoding unit 232 decodes the image data to obtain the image display data signal, and the combiner 233 receives the image display data signal obtained by decoding by the signal decoding unit 232 and provides the image display data signal to the light modulation module 240. The image display data signals include a first color data signal, a second color data signal, a third color data signal, and a fourth color data signal.

In this embodiment, the light modulation module 240 performs image modulation on the first portion of excitation light and the infrared light based on the first color data signal to generate a first color image light and an infrared image light, performs image modulation on the first laser light based on the second color data signal to generate a second color image light, performs image modulation on the second laser light based on the third color data signal to generate a third color image light, and performs image modulation on the third laser light based on the fourth color data signal to generate a fourth color image light. It will be appreciated that in this embodiment, the light modulation module 240 performs image modulation on the infrared light based on the first color data signal to generate the infrared image light, but in a modified embodiment, the light modulation module 240 may perform image modulation on the infrared light based on at least one of the second, third and fourth color data signals to generate the infrared image light.

Further, referring to fig. 6, in the wavelength conversion period T, the light modulation module 240 modulates one frame of image, and it is understood that the wavelength conversion period T may also be regarded as a modulation period of one frame of image (or a modulation period of one frame of image), where the modulation period of one frame of image includes four different time periods, namely, a first sub-frame image modulation period T1, a second sub-frame image modulation period T2, a third sub-frame image modulation period T3, and a fourth sub-frame image modulation period T4. The four time periods may be continuously set, specifically, the wavelength conversion device 207 sequentially emits a first lasing light, a third lasing light, a second lasing light and a first portion of excitation light in the four time periods (i.e. four sub-frame image modulation periods), where the infrared light is also emitted simultaneously with the first portion of excitation light, i.e. sequentially separates red light, yellow light, green light and blue light (and infrared light). Specifically, the excitation light source is turned on all the time in the whole wavelength conversion period (i.e., four sub-frame image modulation periods), the infrared light source is turned on in a period (i.e., a fourth sub-frame image modulation period T4) in which the wavelength conversion device emits a first portion of the excitation light, and the supplemental light source 203 is turned on in a period (i.e., a first sub-frame image modulation period T1) in which the wavelength conversion device 207 emits a first laser light.

Further, the light modulation module 240 performs image modulation on the first excited light based on the second color data signal in the first sub-frame image modulation period T1 to generate a second color image light, performs image modulation on the third excited light based on the fourth color data signal in the second sub-frame image modulation period T2 to generate a fourth color image light, performs image modulation on the third color light based on the third color data signal in the third sub-frame image modulation period T3 to generate a third color image light, and performs image modulation on the first portion of excited light and the infrared light based on the first color data signal in the fourth sub-frame image modulation period T4 to generate a first color image light and an infrared image light.

In this embodiment, the light modulation module 240 includes a modulation module that sequentially modulates the light emitted from the light source system to generate image light in four time periods based on the image display data signal. The light modulation module 240 may include a controller 242 and a modulator 243. The controller 242 receives and converts the image display data signal into a modulation timing control signal, and supplies the modulation timing control signal to the modulator 243. The modulator 243 includes a plurality of modulation units (e.g., mirror units), wherein each modulation unit is configured to generate image light of one pixel of an image to be displayed, and the modulation timing control signal may control an on-state (e.g., on-time) of the modulation unit to modulate the light emitted from the light source system 200, so as to display brightness that the corresponding pixel should display. The modulator 243 sequentially modulates the light emitted by the light source system 200 during the wavelength conversion period T, so as to sequentially generate image light of four sub-frames, namely, second color image light of a second sub-frame, fourth color image light of a fourth sub-frame, third color image light of a third sub-frame, and first color image light and infrared light of a first sub-frame. It can be appreciated that the modulator 243 can also generate a light source control signal to the light source system 200 for controlling the timing of the four colors of light and the infrared light emitted from the light source system 200, so that the timing of the light emitted from the light source system 200 is consistent with the image modulation timing of the modulator 243. In one embodiment, the controller 242 may be a DDP and the modulator 243 may be a DMD, it being understood that the light modulation module 240 is a monolithic DMD modulation module and supports RGBY signals, the DMD does not require separate control of the IR, and the IR image is synchronized with the blue light image.

The following describes the working principle of the projection device, please refer to fig. 8, fig. 8 is a flowchart of the image display control method adopted when the projection device 220 shown in fig. 7 is working. The image display control method includes the following steps S1, S2, S3, S4, S5, and S6.

Step S1, receiving image data, and generating an image display data signal based on the image data. It is understood that the step S1 may be performed by the data processing module 230. Specifically, the data processing module 230 receives a frame of image data and generates an image display data signal based on the frame of image data. The signal receiving unit 231 receives image data to be displayed and supplies each frame of image data to the signal decoding unit 232, the signal decoding unit 232 decodes the image data to obtain the image display data signal, and the combiner 233 receives the image display data signal obtained by the signal decoding unit 232 and supplies the image display data signal to the light modulation module 240. The image display data signals include a first color data signal, a second color data signal, a third color data signal, and a fourth color data signal.

Step S2, providing a first color light, a second color light, a third color light and infrared light. It is understood that the step S2 may be performed by the light source system 200, wherein the first portion of the excitation light, the first lasing section and the second lasing section emitted by the light source system 200 may be respectively used as the first color light, the second color light and the third color light. In one embodiment, the step S2 may further include a step of providing a fourth color light, and the third laser light emitted from the light source system 200 may be used as the fourth color light.

And step S3, performing image modulation on the first color light based on the image display data signal to generate first color image light.

And step S4, performing image modulation on the second color light based on the image display data signal to generate second color image light.

And step S5, carrying out image modulation on the third color light based on the image display data signal to generate third color image light.

And S6, carrying out image modulation on the infrared light based on the image display data signal to generate infrared image light.

Further, in an embodiment, when the step S2 further includes a step of providing the fourth color light, the image display control method may further include a step S7 of: image modulating the fourth color light based on the image display data signal generates fourth color image light.

Specifically, in the method, the steps S3 to S7 may be performed by the light modulation module 240. The light modulation module 240 may image modulate the first color light and the infrared light based on the first color data signal to generate a first color image light, image modulate the second color light based on the second color data signal to generate a second color image light, image modulate the third color light based on the third color data signal to generate a third color image light, and image modulate the fourth color light based on the fourth color data signal to generate a fourth color image light.

As shown in fig. 6, in the steps S3 to S7, the light modulation module 240 performs image modulation on the second color light based on the second color data signal in the first sub-frame image modulation period T1 to generate a second color image light, performs image modulation on the fourth color light based on the fourth color data signal in the second sub-frame image modulation period T2 to generate a fourth color image light, performs image modulation on the third color light based on the third color data signal in the third sub-frame image modulation period T3 to generate a third color image light, and performs image modulation on the first color light and the infrared light based on the first color data signal in the fourth sub-frame image modulation period T4 to generate a first color image light and an infrared image light.

Compared to the prior art, in the light source system 200 and the projection apparatus 220, the area beam splitting device 205 controls the excitation light to be obliquely incident to the reflection area 215 and the conversion area 214 along a predetermined angle through the first area 205a, the reflection area 215 reflects the first part of the excitation light to the second area 205b, so that the second area 205b guides the first part of the excitation light to the light emitting channel 216, and since the optical path of the first part of the excitation light is offset compared with the incident optical path after being reflected by the reflection area 215, the area 205a' of the first part of the excitation light returned from the wavelength conversion device 207 to the area beam splitting device 205 is different from the incident area (the first area 205 a) of the excitation light, and thus the loss generated by the incident area can be avoided without adding additional components, and the light utilization rate of the light source system 200 can be improved.

Specifically, in the conventional light source, blue excitation light is scattered by the scattering powder on the surface of the wavelength conversion device 207, and is combined with other laser light by expansion, and the efficiency can only reach 60% at maximum due to the absorption of the scattering powder, the loss of the collection efficiency of the collection lens, and the loss of the area coating. In the present invention, the light path of the first part of excitation light (such as blue laser) and the infrared light and the light path of the excited light (such as light of other colors such as red, green and yellow) travel different light paths in the light-emitting channel 216, the beam angle of the first part of excitation light is very small, the first part of excitation light is specularly reflected on the surface of the reflection area 215 of the wavelength conversion device 207, no loss of reflectivity and collection efficiency is caused, the first part of excitation light can be totally reflected when the first part of excitation light is incident on the surface of the area light splitting device 205, the efficiency is very high, and can reach more than 80%, which is improved by 33% compared with the existing light source, so that the color of the light emitted by the light source system 200 is greatly improved. And the light path of the infrared light is the same as that of the first part of excitation light, and the efficiency can be the same as or even higher than that of the excitation light. Other lasing (except red lasing has a small transmission loss in the third region 205 c), such as green light, which has a major effect on brightness, can increase the efficiency by 8% because there is no region coating. In view of the above, the light source system 200 provided by the present invention is a high-efficiency light source.

Further, in the embodiment, the light source system 200, the projection device 220 and the image display control method, the auxiliary light source 202 further provides infrared light, so that the infrared light can be modulated according to the image display data signal to generate infrared image light, the infrared display function is increased, night vision becomes possible, and the infrared light image projected by the projector can be watched by wearing night vision glasses (night vision goggle, NVG), so that the relevant projection device 220 can be applied to special occasions such as night simulation, for example, training simulators for military operations and training pilots, namely, the functions are better and richer, and the application field is wider.

Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating a structure of a wavelength conversion device 307 and a scattering device 310 of a light source system according to a second embodiment of the present invention, and fig. 10 is a light emission timing chart of the light source system according to the second embodiment of the present invention. The light source system is basically the same in structure as the light source system of the first embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the wavelength conversion device 307 and the scattering device 310 have different structures, and the light emission timing of the light source system is different.

Specifically, in the present embodiment, the conversion region of the wavelength conversion device 307 includes a first conversion region 314a and a second conversion region 314b, the first conversion region 314a is configured to convert the received excitation light into the first lasing light (e.g. red lasing light), and the second conversion region 314b is configured to convert the received excitation light into the second lasing light (e.g. green lasing light), wherein the first and second conversion regions 314a and 314b are substantially the same as the first and second conversion regions 214a and 214b in the first embodiment, and the structures thereof will not be repeated here. The reflective region includes a first reflective region 315a and a second reflective region 315b, the first reflective region 315a reflects the first portion of the excitation light to the second region of the regional beam-splitting device, and the second reflective region 315b reflects the infrared light to the second region of the regional beam-splitting device, i.e., the first portion of the excitation light and the infrared light are incident on different reflective regions of the regional beam-splitting device. The first conversion area 314a, the second conversion area 314b, the first reflection area 315a, and the second reflection area 315b may be four segmented areas disposed end to end along a circumferential direction, where the first conversion area 314a is disposed opposite to the second conversion area 314b, and the first reflection area 315a is disposed opposite to the second reflection area 315 b.

In the scattering device 310, the filter region includes a first filter region 318a and a second filter region 318b, and the scattering region includes a first scattering region 317a and a second scattering region 317b, corresponding to the wavelength conversion device 307. The first filtering area 318a is configured to filter the first laser light emitted from the light emitting channel, the second filtering area 318b is configured to filter the second laser light emitted from the light emitting channel, the first scattering area 317a is configured to scatter a first portion of the excitation light emitted from the light emitting channel, and the second scattering area 317b is configured to scatter the infrared light. The first filter region 318a, the first scattering region 317a, the second filter region 318b, and the second scattering region 317b are four segmented regions disposed end to end in the circumferential direction, wherein the first filter region 318a is disposed opposite to the second filter region 318b, and the first scattering region 317a is disposed opposite to the second scattering region 317b.

When the light source system having the wavelength conversion device 307 and the scattering device 310 is in operation, the wavelength conversion device sequentially emits the first lasing light, the infrared light, the second lasing light and the first partial excitation light, i.e. sequentially separates red light, infrared light, green light and blue light, in a wavelength conversion period T (also referred to as a color wheel period or a modulation period of a frame of image). Specifically, the excitation light source is turned on all the time in the whole wavelength conversion period T, the infrared light source is turned on in a period when the wavelength conversion device emits a first portion of excitation light, and the supplemental light source is turned on in a period when the wavelength conversion device emits a first lasing light (i.e., when the wavelength conversion device 307 emits a lasing light having a color component with the supplemental light).

Further, referring to fig. 11, fig. 11 is a schematic structural diagram of a projection apparatus 320 according to a second embodiment of the present invention. The projection apparatus 320 employs the light source system 300 having the wavelength conversion device 307 and the scattering device 310 according to the second embodiment.

In the wavelength conversion period T, the light modulation module 340 modulates one frame of image, and it can be understood that the wavelength conversion period T may also be regarded as a modulation period of one frame of image (or a modulation period of one frame of image), where the modulation period of one frame of image includes four different time periods, that is, a first sub-frame image modulation period T1, a second sub-frame image modulation period T2, a third sub-frame image modulation period T3, and a fourth sub-frame image modulation period T4, respectively. The four time periods may be continuously set. Specifically, the wavelength conversion device 307 sequentially emits the first lasing light, the infrared light, the second lasing light and the first portion of the excitation light in the four time periods (i.e., four sub-frame image modulation periods), that is, sequentially emits the red light, the infrared light, the green light and the blue light. Specifically, the excitation light source is turned on all the time in the whole wavelength conversion period T (i.e., four sub-frame image modulation periods), the infrared light source is turned on in the second sub-frame image modulation period T2, and the supplemental light source is turned on in the period (i.e., the first sub-frame image modulation period T1) in which the wavelength conversion device 307 emits the first laser light.

Further, in the projection device 320 and the image display control method thereof, the light modulation module 240 performs image modulation on the first laser light based on a second color data signal in the first sub-frame image modulation period T1 to generate a second color image light, performs image modulation on the infrared light based on an infrared data signal in the second sub-frame image modulation period T2 to generate an infrared image light, performs image modulation on the third color light based on a third color data signal in the third sub-frame image modulation period T3 to generate a third color image light, and performs image modulation on the first portion of the excitation light based on a first color data signal in the fourth sub-frame image modulation period T4 to generate a first color image light and an infrared image light. The infrared data signal may be any one of the first color data signal, the second color data signal, and the third color data signal. In this embodiment, the infrared data signal is mainly described as a third color data signal (i.e., a green data signal).

It can be appreciated that the controller 342 of the light modulation module 340 can also generate a light source control signal to the light source system 300 for controlling the timing of the three colors of light and the infrared light emitted from the light source system 300, so that the timing of the light emitted from the light source system 300 is consistent with the image modulation timing of the modulator 343. In addition, it will be appreciated that the optical modulation module 340 of the projection device of this embodiment is a monolithic DMD module, and that the optical modulation module 340 is required to support RGBY signals, in which the infrared data signals are coupled into the Y-channel of the DDP, as shown in fig. 11. In this case, due to the characteristics of the DDP process of the controller 342, an infrared light image can be displayed only when a still image is displayed.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a projection apparatus 420 according to a third embodiment of the present invention. The projection device 420 is substantially identical to the projection device 320 of the second embodiment, that is, the above description of the projection device 320 is basically applicable to the projection device 420, and the difference therebetween is mainly that: the structure of the light modulation module 440 is different. Specifically, the light modulation module 440 includes a first modulation module 441a and a second modulation module 441b, where the first modulation module 441a is configured to perform image modulation on the first portion of excitation light and the second portion of excitation light, and the second modulation module 441b is configured to perform image modulation on the first portion of laser light and the infrared light. Each of the modulation modules 441 includes a controller 442 (e.g., a DDP) and a modulator 443 (e.g., a DMD). The controller 442 of the first modulation module 441a receives a first color data signal and a third color data signal, and the controller 442 of the first modulation module 441a generates a first timing control signal based on the first color data signal and the third color data signal to control the modulator 443 of the first modulation module 441a, such that the modulator 443 of the first modulation module 441a modulates the first portion of excitation light and the second laser light to generate the first color image light and the third color image light based on the first timing control signal. The controller 442 of the second modulation module 441b receives a second color data signal and an infrared data signal, and the controller 442 of the second modulation module 441b generates a second timing control signal based on the second color data signal and the infrared data signal to control the modulator 443 of the second modulation module 441b, so that the modulator 443 of the second modulation module 441b modulates the first lasing light and the infrared light to generate the second color image light and the infrared image light based on the second timing control signal. In this embodiment, the controllers 442 are DDP controllers supporting RGB signals, and each controller 442 includes three signal input channels of RGB. Two channels (e.g., R channel and G channel) of the three signal input channels of the controller 442 of the first modulation module 441a may receive the third color data signal (e.g., green data signal), and another channel (e.g., B channel) may receive the first color data signal (e.g., blue data signal). Two of the three signal input channels (e.g., R channel and G channel) of the controller 442 of the second modulation module 441B may receive the second color data signal (e.g., red data signal), and the other channel (e.g., B channel) may receive the infrared data signal. The infrared data signal may be any one of the first color data signal, the second color data signal, and the third color data signal, and this embodiment mainly uses the infrared data signal as an example.

In the third embodiment, the projection device 420 employs a dual-chip DMD modulation module, and each modulator 443 is required to process RBG signals, so that the infrared data signals can be independent of other three color data signals (such as blue, red and green data signals) without interference.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a projection apparatus 520 according to a fourth embodiment of the present invention. The projection device 520 has substantially the same structure as the projection device 420 of the third embodiment, that is, the above description of the projection device 420 is basically applicable to the projection device 520, and the difference therebetween is mainly that: the data processing module 530 is different in that the infrared data signals employ data signals calculated based on the first color data signal, the second color data signal, and the third color data signal. Specifically, the data processing module 530 further includes a signal processing unit 534, where the signal processing unit 534 receives the first color data signal, the second color data signal, and the third color data signal output by the signal decoding unit 532, and calculates the infrared data signal based on the first color data signal, the second color data signal, and the third color data signal, that is, the infrared data signal is a composite signal of the first color data signal, the second color data signal, and the third color data signal. Setting a signal value of any one pixel in the first to third data signals to A, B, C, wherein a signal value IR of an infrared data signal of any one pixel accords with the following formula:

IR＝(A*a+B*b+C*c)/Y_max；

Wherein a, b, and c represent the brightness of the first portion of excitation light, the first lasing and the second lasing respectively provided to the light modulation module 540, and when the first color data signal, the second color data signal, and the third color data signal are (255, 255, 255) in any one pixel, the image brightness is the maximum, i.e. the image maximum brightness Y _max =a+b+c. Specifically, the signal value IR of the infrared data signal of any one pixel may be rounded, such as rounded, as a result of (a×a+b+c×c)/Y _max. For example, if the first, second and third color data signal values of any one pixel are (50, 60, 80), then the signal value of the corresponding infrared data signal of any one pixel should be the result of (50×a+60×b+80×c)/Y _max. Therefore, in the projection apparatus of the present embodiment, the infrared data signal can be obtained by performing calculation of the infrared data signal value for each pixel point of one image by this algorithm.

In this embodiment, since the infrared data signal is a composite signal of the first color data signal, the second color data signal, and the third color data signal, each pixel value in the infrared image is consistent with the gray scale of the black-and-white image compounded by the first color data signal, the second color data signal, and the third color data signal, so that the infrared image is not distorted, i.e., the infrared image is fidelity.

Referring to fig. 14 and 15, fig. 14 is a schematic structural view of a light source system 600 of a projection apparatus according to a fifth embodiment of the present invention, and fig. 15 is an enlarged schematic partial view of the light source system 600 shown in fig. 14. The light source system 600 has substantially the same structure as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 600, and the difference therebetween is mainly that: the wavelength conversion means 607 and the guide means 713 are different in structure. Specifically, the reflection area 615 of the wavelength conversion device 607 may include a reflection surface 615c, and the reflection surface 615c includes a semi-arc convex surface for correcting an optical axis and an optical path of the first portion of the excitation light (e.g., blue light) and the infrared light. The optical axes of the first part of excitation light and the infrared light reflected by the wavelength conversion device 607 are overlapped with the laser (such as red laser receiving light and green laser receiving light), and then the light is scattered by the scattering device 610 at the entrance of the light homogenizing device 611 (such as square bar), and the angle distribution of the light is similar to that of the laser receiving light, so as to improve uniformity. Further, since the reflection area 615 of the wavelength conversion device 607 may include a reflection surface 615c, the guiding device 613 may not be provided with a curved mirror, in particular, the guiding device 713 may be a reflection film, which may reflect the excitation light, the supplemental light, the lasing light, and the infrared light, and the reflection film may receive the light of the first light-emitting channel 616a and reflect the light of the first light-emitting channel 616a to the second light-emitting channel 616b.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating a light source system 700 of a projection apparatus according to a sixth embodiment of the present invention. The light source system 700 has substantially the same structure as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 700, and the difference therebetween is mainly that: the area spectroscopic apparatus 705 has a different structure.

In this embodiment, the area beam splitter 705 includes a beam splitter 708 and a mirror 709, the beam splitter 708 is disposed corresponding to a first area, the mirror 709 is disposed corresponding to a second area, the beam splitter 708 of the first area receives the excitation light and transmits the excitation light to the wavelength converter 707, the wavelength converter 707 reflects the first portion of the excitation light to the mirror 709, the mirror 709 reflects the first portion of the excitation light to the first light outlet channel 716a, and the beam splitter of the first area further reflects the laser light to the first light outlet channel 716a. Specifically, the reflecting surface of the reflecting mirror 709 is concave, and at least a part of the laser light is transmitted to the beam-splitting sheet 708 through the reflecting mirror 709, so that the beam-splitting sheet 708 reflects the laser light emitted from the wavelength conversion device 707 to the first light-emitting channel 716a. It will be appreciated that the concave surface of the mirror 709 is designed to correct the optical path of the first portion of the excitation light (e.g., blue light) with the infrared light, so as to coincide with the optical path of the laser light, thereby improving the uniformity of the light incident on the light uniformizing means 711. Further, the guiding device 712 may not be provided with a curved mirror, and in particular, the guiding device 712 may be a reflective film, which may reflect the excitation light, the supplemental light, the laser light, and the infrared light, and the reflective film may receive the light of the first light-emitting channel 716a and reflect the light of the first light-emitting channel 716a to the second light-emitting channel 716b.

Referring to fig. 17, fig. 17 is a schematic diagram of a light source system 800 of a projection apparatus according to a seventh embodiment of the present invention. The light source system 800 has substantially the same structure as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 800, and the difference therebetween is mainly that: the area spectroscopic device 805 is different in structure.

In this embodiment, the area beam splitting device 805 includes a beam splitting sheet 808 and a reflecting mirror 809, the beam splitting sheet 808 is disposed corresponding to a first area, the reflecting mirror 809 is disposed corresponding to a second area, the beam splitting sheet 808 of the first area receives the excitation light and transmits the excitation light to the wavelength conversion device 807, the wavelength conversion device 807 reflects the first portion of the excitation light to the reflecting mirror 809, the reflecting mirror 809 reflects the first portion of the excitation light to a first light emitting channel 816a, and the beam splitting sheet 808 of the first area also reflects the excitation light to the first light emitting channel 816a. Specifically, the reflecting surface of the reflecting mirror 809 is convex, the wavelength conversion device 807 reflects the first portion of the excitation light to the reflecting mirror 809 via the light splitting sheet 808, and the first portion of the excitation light and the infrared light reflected by the reflecting mirror 809 enter the first light emitting channel 816a via the light splitting sheet. It will be appreciated that the convex surface of the mirror 809 is designed to correct the optical path of the first portion of excitation light (e.g., blue light) and the infrared light to coincide with the optical path of the laser light, thereby improving the uniformity of the light incident on the light homogenizing device 811. Further, the guiding device 813 may not be provided with a curved mirror, and specifically, the guiding device 813 may be a reflective film, which may reflect the excitation light, the supplemental light, the laser light, and the infrared light, and the reflective film may receive the light of the first light-emitting channel 816a and reflect the light of the first light-emitting channel 816a to the second light-emitting channel 816b.

Referring to fig. 18, fig. 18 is a schematic diagram illustrating a light source system 900 of a projection apparatus according to an eighth embodiment of the present invention. The light source system 900 has substantially the same structure as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 900, and the difference therebetween mainly lies in: the guiding means 913 are of different construction. Specifically, the guiding device 913 includes a light splitting sheet 908 and a reflecting mirror 909, the light splitting sheet 908 receives the received laser light emitted from the area beam splitting device 905 through the first light emitting channel 916a and reflects the laser light to the second light emitting channel 916b, and the reflecting mirror 909 receives the first part of the excitation light emitted from the area beam splitting device 905 through the first light emitting channel 916a and reflects the first part of the excitation light to the second light emitting channel 916b.

In this embodiment, the reflecting surface of the reflecting mirror 909 is concave, at least part of the laser light in the first light-emitting channel 916a is transmitted to the light-splitting sheet 908 via the reflecting mirror 909, and the light-splitting sheet 908 transmits the at least part of the laser light to the second light-emitting channel 916b via the reflecting mirror 909. It will be appreciated that the concave surface of the mirror 909 is designed to correct the optical path length of the first portion of the excitation light (e.g., blue light) and the infrared light for matching the optical path length of the laser light, thereby improving the uniformity of the light incident on the light homogenizing device 911.

Referring to fig. 19, fig. 19 is a schematic view of a light source system 1000 of a projection apparatus according to a ninth embodiment of the present invention. The light source system 1000 has substantially the same structure as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 1000, and the difference therebetween is mainly that: the structures of the area spectroscopic device 1005, the wavelength conversion device 1007, and the scattering device 1010 are different, and thus the light-emitting channels 1116 are slightly different. Specifically, the area beam splitting device 1005 includes a beam splitter 1008 and a mirror 1009, the beam splitter 1008 is disposed corresponding to a first area, the mirror 1009 is disposed corresponding to a second area, a first surface of the beam splitter 1008 of the first area receives the excitation light and reflects the excitation light to the wavelength conversion device 1007, the wavelength conversion device 1007 reflects the first portion of the excitation light to the mirror 1009 of the second area, the mirror 1009 reflects the first portion of the excitation light to a second surface of the beam splitter 1008 of the first area opposite to the first surface, the second surface of the beam splitter 1008 of the first area reflects the first portion of the excitation light to the light outlet channel 1116, and the wavelength conversion device 1007 also reflects the excited light to the light outlet channel 1116. The area beam splitter 1005 further includes a guiding element 1113, and the guiding element 1113 reflects the supplementary light emitted by the supplementary light source 1003 to the wavelength conversion device 1007, so that the wavelength conversion device 1007 reflects the supplementary light to the light output channel 1116 together with the excited light. The scattering device 1110 and the wavelength conversion device 1007 are two separate elements separately disposed, the scattering device 1110 is configured to receive the light of the light-emitting channel 116 and provide the scattered light to the entrance of the light-homogenizing device 1111, and the third collecting system 1006c is configured to collect the light of the light-emitting channel 1116 so that the light of the light-emitting channel 1116 is imaged to the entrance of the light-homogenizing device 1111 via the scattering device 1110.

Referring to fig. 20, fig. 20 is a schematic diagram of a light source system 1200 of a projection apparatus according to a tenth embodiment of the present invention. The light source system 1200 is basically the same as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 is basically applicable to the light source system 1200, and the difference therebetween mainly lies in: the supplemental light source 1203 is different. In this embodiment, the supplementary light includes a first supplementary light and a second supplementary light, the supplementary light source 1203 includes a first supplementary light source 1203a for emitting the first supplementary light and a second supplementary light source 1203b for emitting the second supplementary light, the first supplementary light and the second supplementary light may be combined and provided to a third area 1205c of the area beam splitter 1205, and the third area 1205c may transmit the first supplementary light and the second supplementary light. The first supplemental light and the first laser have at least partially the same color component, such as red, and the first supplemental light source and the supplemental light source structure of the first embodiment may be the same, which is not described herein. The second supplemental light has at least a portion of the same color component as the second laser, such as green. The second supplemental light sources 1203b each include a green light emitting diode. The first supplemental light and the second supplemental light are both laser light. Specifically, the second supplemental light source 1203b is turned on when the wavelength conversion device 1207 emits the second lasing light, and the second supplemental light source 1203b is turned off when the wavelength conversion device 1207 emits the first lasing light, a first portion of the excitation light.

Referring to fig. 21 and 22, fig. 21 is a schematic structural diagram of a projection apparatus 1320 according to an eleventh embodiment of the present invention, and fig. 22 is a light emission timing chart of a light source system 1300 of the projection apparatus 1320 shown in fig. 21. The structures of the projection apparatus 1320 and the light source system 1300 are substantially the same as those of the projection apparatus 220 and the light source system 200 of the first embodiment, that is, the above description of the projection apparatus 220 and the light source system 200 is basically applicable to the projection apparatus 1320 and the light source system 1300, and the differences therebetween are mainly that: the guiding device 1308 of the light source system 1300 is different from the infrared light source 1302, the light emission timing of the light source system 1300, the control and modulation methods of the data processing module 1330 and the light modulation module 1340.

Specifically, the infrared light source 1302 is disposed adjacent to the directing means 1308, the directing means 1308 being a light splitting film that reflects the first portion of the excitation light, the laser light, but transmits infrared light emitted by the infrared light source, and specifically, the directing means 1308 may reflect visible light transmitting infrared light. Specifically, the guiding device 1308 receives the infrared light and transmits the infrared light to the second light-emitting channel 1316b, and the light path channel of the excited light in the second light-emitting channel 1316b surrounds the light path channel of the first part of the excited light and the infrared light in the second light-emitting channel 1316b, so that in this embodiment, the infrared light does not pass through the area beam splitting device 1305 and the wavelength converting device 1307, but directly combines with other light in the second light-emitting channel 1316b (i.e., before the entrance of the light homogenizing device 1311). The light source system 1300 further includes a light source controller 1319, the light source controller 1319 configured to control the light emission intensity of the infrared light source 1302.

The method for controlling the image display of the projection apparatus 1320 will be described below, where it will be understood that the description of the portions that are different from those of the first embodiment will be mainly described below, and the same portions will not be repeated.

Specifically, the modulation period (i.e. one wavelength conversion period T) of one frame of image by the light modulation module 1340 includes three different time periods, namely, a first sub-frame image modulation period T1, a second sub-frame image modulation period T2, and a third sub-frame image modulation period T3, respectively, where the light modulation module 1340 generates a second color image light by image modulating the first laser light based on the second color data signal in the first sub-frame image modulation period T1, generates a third color image light by image modulating the second laser light based on the third color data signal in the second sub-frame image modulation period T2, generates a first color image light by image modulating the first portion of excitation light based on the first color data signal in the third sub-frame image modulation period T3, and generates an infrared image light by image modulating the infrared light based on the infrared data signal in the first, second, and third sub-frame image modulation periods T1, T2, and T3 (i.e. the modulation period T of the whole frame image).

Further, the data processing module 1330 decodes the received image data to obtain the first color data signal, the second color data signal, and the third color data signal, the data processing module 1330 further calculates an infrared data signal based on the first to third color data signals, and sets a signal value of any one pixel of the first to third data signals to be A, B, C, the brightness of the first portion of the excitation light, the first lasing light, and the second lasing light provided to the light modulation module 1340 to be a, b, and c, respectively, and the light source controller 1319 controls the brightness of the infrared light such that the brightness of the infrared light provided to the light modulation module 1340 in the three sub-frame image modulation periods is d, e, and f, respectively, where d=α×a; e=α×b; f=α×c, that is, the luminance of the infrared light supplied to the light modulation module 1340 in the three sub-frame image modulation periods T1, T2, and T3 is α times the luminance of the first to third color lights, respectively, so that the above parameters can satisfy the following formulas: (a/255+b/255+c/255) =α (a/d/255+b e/255+c f/255), i.e., (a+b+c) =α (a+d+b e+c f), so that the generated infrared light image matches the gray scale of the visible light image.

For example, let the signal value A, B, C of any pixel in the first to third data signals be (50, 40, 30), the expected brightness is y=50×a/255+40×b/255+30×c/255. If the signal values (50, 40, 30) are used to control the infrared light, in order to ensure that the pixel brightness is not distorted, it is necessary to ensure that the actual brightness value Y '=50×d/255+40×e/255+30×f/255 and d=αa, e=αb, f=αc, where the actual pixel brightness value Y' =α (50×a/255+40×b/255+30×c/255), that is, the brightness corresponding to the infrared light is α times that of the visible light, so that the brightness value of each pixel is α times that of the RGB visible light image, the light source controller 1319 may be used to control the infrared light source to keep the brightness of the infrared light source d, e, f in the three sub-frame image modulation periods T1, T2 and T3.

In one embodiment, since the wavelength conversion device has a green (i.e., second lasing) luminance > a red (i.e., first lasing) luminance > a blue (i.e., excitation) luminance, and b > a > c, the light source controller 1319 may control the infrared light to have a highest luminance L2 when the wavelength conversion device is turned to the green (i.e., second sub-frame image modulation period), a lowest luminance L3 when the wavelength conversion device is turned to the blue (i.e., third sub-frame image modulation period), and a luminance L1 when the wavelength conversion device is turned to the red (i.e., first sub-frame image modulation period) between L3 and L2, i.e., L3< L1< L2.

In particular, it is understood that the light source controller 1319 may receive the infrared data signal or the controller of the light modulation module 1340 may control the driving current of the infrared light source 1302 to adjust the brightness of the infrared light based on the light source timing control signal generated by the infrared data signal.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A light source system, comprising an excitation light source, an auxiliary light source, and a wavelength conversion device, wherein:

The excitation light source is used for emitting excitation light, the wavelength conversion device comprises a conversion area and a reflection area, and the wavelength conversion device periodically moves so that the conversion area and the reflection area are periodically positioned on the light path of the excitation light in a time-sharing manner; the conversion area is used for converting the excitation light into laser light and emitting the laser light, and the reflection area is used for reflecting the excitation light and emitting the laser light; the laser light and the excitation light emitted from the wavelength conversion device are positioned on the same side of the wavelength conversion device but the optical axes are not coincident, and the laser light and the excitation light emitted from the wavelength conversion device are both guided to an light-emitting channel,

The auxiliary light source is used for emitting auxiliary light, the auxiliary light is not overlapped with the spectrum of the laser, and the auxiliary light is also guided to the light outlet channel; the light source system further comprises a supplemental light source for emitting supplemental light; the laser comprises a first laser light receiving part and a second laser light receiving part, the supplementary light comprises a first supplementary light and a second supplementary light, the supplementary light comprises a first supplementary light source used for emitting the first supplementary light and a second supplementary light source used for emitting the second supplementary light, the first supplementary light and the first laser light have at least partially the same color component, the second supplementary light and the second laser light have at least partially the same color component, the second supplementary light source is started when the wavelength conversion device emits the second laser light receiving part, and the second supplementary light source is closed when the wavelength conversion device emits the first laser light receiving part and the first part of the excitation light.

2. A light source system as recited in claim 1, wherein: the auxiliary light comprises infrared light, which is used to modulate the infrared image.

3. A light source system as recited in claim 1, wherein: the auxiliary light includes ultraviolet light, which is used for ultraviolet light exposure.

4. A light source system as recited in claim 1, wherein: the light source system further comprises a regional beam splitting device, wherein the regional beam splitting device comprises a first region and a second region:

The first area of the area beam splitting device guides the excitation light emitted by the excitation light source to the wavelength conversion device, the reflection area reflects the excitation light to the second area of the area beam splitting device, the second area of the area beam splitting device is used for guiding the excitation light reflected by the reflection area to the light outlet channel, and the area beam splitting device is also used for guiding the laser emitted by the conversion area to the light outlet channel.

5. A light source system as recited in claim 4, wherein: the light source system further comprises a light combining device, the light combining device comprises a light combining element, the light combining element receives auxiliary light emitted by the auxiliary light source and excitation light emitted by the excitation light source, one of the auxiliary light and the excitation light is transmitted, the other of the auxiliary light and the excitation light is reflected, the auxiliary light and the excitation light are combined, the combined auxiliary light and the excitation light are provided to the wavelength conversion device, and light path channels of the combined auxiliary light and the excitation light are overlapped.

6. A light source system as recited in claim 5, wherein: the area light splitting device comprises a light splitting sheet and a reflecting mirror, the light splitting sheet is arranged corresponding to the first area, the reflecting mirror is arranged corresponding to the second area, the light splitting sheet in the first area receives the excitation light and the auxiliary light and transmits the excitation light and the auxiliary light to the wavelength conversion device, the wavelength conversion device reflects the excitation light and the auxiliary light to the reflecting mirror, the reflecting mirror reflects the excitation light and the auxiliary light to the light outlet channel, and the light splitting sheet in the first area also reflects the excited light to the light outlet channel.

7. A light source system as recited in claim 5, wherein: the light source system further comprises a guiding device, the light outlet channel comprises a first light outlet channel and a second light outlet channel, the area light splitting device guides the light emitted by the wavelength conversion device to the guiding device through the first light outlet channel, and the guiding device guides the light in the first light outlet channel to the second light outlet channel.

8. A light source system as recited in claim 7, wherein: the guiding device comprises a light splitting sheet and a reflecting mirror, wherein the light splitting sheet receives the received laser emitted by the area light splitting device through the first light emitting channel and reflects the laser to the second light emitting channel, and the reflecting mirror receives the excitation light and the auxiliary light emitted by the area light splitting device through the first light emitting channel and reflects the excitation light and the auxiliary light to the second light emitting channel.

9. A light source system as recited in claim 4, wherein: the light source system further comprises a guiding device, the light outlet channels comprise a first light outlet channel and a second light outlet channel, the area light splitting device guides the light emitted by the wavelength conversion device to the guiding device through the first light outlet channel, the guiding device guides the light in the first light outlet channel to the second light outlet channel, the light path channel of the laser in the first light outlet channel surrounds the light path channel of the excitation light in the first light outlet channel, the guiding device receives the auxiliary light and transmits the auxiliary light to the second light outlet channel, and the light path channel of the laser in the second light outlet channel surrounds the light path channel of the excitation light and the auxiliary light in the second light outlet channel.

10. A light source system as recited in claim 9, wherein: the area light splitting device comprises a light splitting sheet and a reflecting mirror, the light splitting sheet is arranged corresponding to the first area, the reflecting mirror is arranged corresponding to the second area, a first surface of the light splitting sheet in the first area receives the excitation light and the auxiliary light and reflects the excitation light and the auxiliary light to the wavelength conversion device, the wavelength conversion device reflects the excitation light to the reflecting mirror in the second area, the reflecting mirror reflects the excitation light to a second surface, opposite to the first surface, of the light splitting sheet in the first area, the second surface of the light splitting sheet in the first area reflects the excitation light to the light emitting channel, and the wavelength conversion device further reflects the stimulated light to the light emitting channel.

11. A light source system as recited in claim 4, wherein: the light source system further comprises a scattering device, wherein the scattering device is used for receiving the light of the light-emitting channel and scattering the light emitted by the light-emitting channel.

12. A light source system as recited in claim 11, wherein: the light source system further comprises a first collecting system, wherein the first collecting system is used for collecting the light emitted by the wavelength conversion device and providing the collected light to the regional beam splitting device; the light source system further comprises a second collecting system, wherein the second collecting system is used for receiving the light of the light-emitting channel and collecting the light of the light-emitting channel and then providing the light to the scattering device; the light source system further comprises a light homogenizing device, wherein the light homogenizing device is used for receiving the light emitted by the scattering device and homogenizing and combining the light emitted by the scattering device; the light homogenizing device comprises a square rod, and the light source system further comprises a third collecting system, wherein the third collecting system collects light emitted by the light emitting channel to an inlet of the square rod.

13. A light source system as recited in claim 11, wherein: the scattering device comprises a scattering area and a filtering area, the scattering area is used for scattering excitation light emitted by the light-emitting channel, the filtering area is used for filtering the laser emitted by the light-emitting channel, and the scattering area and the filtering area are arranged along the circumferential direction.

14. A light source system as recited in claim 13, wherein: the conversion region comprises a first conversion region and a second conversion region, the first conversion region is used for converting received excitation light into first lasing light, the second conversion region is used for converting received excitation light into second lasing light, and the first lasing light and the second lasing light are different in color.

15. A light source system as recited in claim 14, wherein: the reflection area comprises a first reflection area and a second reflection area, the first reflection area reflects the first part of excitation light to a second area of the area light splitting device, the second reflection area reflects infrared light to a second area of the area light splitting device, the first reflection area, the second reflection area, the first conversion area and the second conversion area are connected in the circumferential direction, the light filtering area comprises a first light filtering area and a second light filtering area, the light scattering area comprises a first scattering area and a second scattering area, the first light filtering area, the first scattering area, the second light filtering area and the second scattering area are connected in the circumferential direction, the first light filtering area is used for filtering the first excited light emitted by the light emitting channel, the second light filtering area is used for filtering the second excited light emitted by the light emitting channel, the first scattering area is used for scattering the first part of excitation light emitted by the light emitting channel, and the second light scattering area is used for scattering the infrared light.

16. A light source system as recited in claim 15, wherein: the conversion region further comprises a third conversion region for converting the received excitation light into a third lasing light, wherein the first, second and third lasing light are different in color; the optical filtering area further comprises a third optical filtering area, the first optical filtering area, the second optical filtering area, the third optical filtering area and the scattering area are connected in the circumferential direction, the first optical filtering area is used for filtering the first laser emitted by the light emitting channel, the second optical filtering area is used for filtering the second laser emitted by the light emitting channel, and the third optical filtering area is used for filtering the third laser emitted by the light emitting channel.

17. A light source system as recited in claim 13, wherein: the scattering device and the wavelength conversion device are of an integrated structure, and the scattering region and the filtering region are positioned at the inner sides of the reflecting region and the conversion region.

18. A light source system as recited in claim 1, wherein: the reflective region includes a reflective surface including a semi-arcuate convex surface.

19. A light source system as recited in claim 1, wherein: the supplemental light is directed to the conversion region, the conversion region reflects the supplemental light, the supplemental light is directed to the light-out channel, and an optical path channel of the supplemental light in the light-out channel coincides with an optical path channel of the laser light in the light-out channel.

20. A light source system as recited in claim 4, wherein: the second region further includes a third region that transmits the supplemental light emitted by the supplemental light source to the wavelength conversion device.

21. A projection device comprising a light source system, characterized in that: the light source system adopts the light source system as claimed in any one of claims 1,3 to 20.

22. A projection device, characterized by: the projection device comprises a light source system comprising an excitation light source, an infrared light source, and a wavelength conversion device, wherein:

The infrared light source is used for emitting infrared light, the infrared light is used for modulating an infrared image, the infrared light is not overlapped with the spectrum of the excited light, and the infrared light is also guided to the light-emitting channel; the laser comprises a first lasing device, a second lasing device and a third lasing device; the projection device further comprises a data processing module and a light modulation module, wherein the data processing module is used for receiving image data and generating image display data signals based on the image data, and the image display data signals comprise a first color data signal, a second color data signal, a third color data signal and a fourth color data signal; the modulation period of one frame of image by the light modulation module comprises four different time periods, namely a first sub-frame image modulation period, a second sub-frame image modulation period, a third sub-frame image modulation period and a fourth sub-frame image modulation period, wherein the light modulation module carries out image modulation on the first laser based on the second color data signal to generate second color image light in the first sub-frame image modulation period, carries out image modulation on the third laser based on the fourth color data signal in the second sub-frame image modulation period to generate fourth color image light, carries out image modulation on the second laser based on the third color data signal in the third sub-frame image modulation period to generate third color image light, and carries out image modulation on the first part of excitation light and the infrared light based on the first color data signal in the fourth sub-frame image modulation period to generate first color image light and infrared image light.

23. The projection device of claim 22, wherein: the conversion region comprises a first conversion region and a second conversion region, the first conversion region is used for converting received excitation light into first lasing light, the second conversion region is used for converting received excitation light into second lasing light, the first lasing light is different from the second lasing light in color, the light modulation module is used for performing image modulation on the first part of excitation light based on the image display data signal to generate first color image light, performing image modulation on the first lasing light based on the image display data signal to generate second color image light, performing image modulation on the second lasing light based on the image display data signal to generate third color image light, and further performing image modulation on the infrared light based on the image display data signal to generate infrared image light.

24. The projection device of claim 23, wherein: the conversion region further comprises a third conversion region for converting the received excitation light into the third lasing light, the first, second and third lasing colors are different, and the light modulation module is further used for performing image modulation on the third lasing light based on the image display data signal to generate fourth color image light.

25. The projection device of claim 24, wherein: the light modulation module image modulates the first portion of excitation light based on the first color data signal to produce a first color image light, image modulates the first laser light based on the second color data signal to produce a second color image light, image modulates the second laser light based on the third color data signal to produce a third color image light, image modulates the third laser light based on the fourth color data signal to produce a fourth color image light, and image modulates the infrared light based on at least one of the four color data signals to produce an infrared image light.

26. The projection device of claim 24, wherein: the image display data signal comprises a first color data signal, a second color data signal, a third color data signal and an infrared data signal, wherein the light modulation module is used for carrying out image modulation on the first part of excitation light based on the first color data signal to generate first color image light, carrying out image modulation on the first laser based on the second color data signal to generate second color image light, carrying out image modulation on the second laser based on the third color data signal to generate third color image light, and carrying out image modulation on the infrared light based on the infrared data signal to generate infrared image light.

27. The projection device of claim 26, wherein: the data processing module decodes the image data to obtain the first to third color data signals, and the data processing module takes one of the first to third color data signals as the infrared data signal.

28. The projection device of claim 26, wherein: the light modulation module generates second color image light by image modulating the first laser light based on the second color data signal in the first sub-frame image modulation period, generates infrared image light by image modulating the infrared light based on the infrared data signal in the second sub-frame image modulation period, generates third color image light by image modulating the second laser light based on the third color data signal in the third sub-frame image modulation period, and generates first color image light by image modulating the first portion of the excitation light based on the first color data signal in the fourth sub-frame image modulation period.

29. The projection device of claim 23, wherein: the light modulation module comprises a first modulation module and a second modulation module, the first modulation module is used for carrying out image modulation on the first part of excitation light and the first laser, and the second modulation module is used for carrying out image modulation on the second laser and the infrared light.

30. The projection device of claim 26, wherein: the data processing module decodes the image data to obtain the first color data signal, the second color data signal and the third color data signal, the data processing module calculates an infrared data signal based on the first to third color data signals, and sets a signal value of any one pixel of the first to third data signals to be A, B, C, and an infrared data signal value ir= (a+b+c) of any one pixel to be Y _max, wherein a, B, C respectively represent brightness of the first portion of excitation light, the first lasing light and the second lasing light provided to the light modulation module, and Y _max =a+b+c.

31. The projection device of claim 26, wherein: the modulation period of one frame of image by the light modulation module comprises three different time periods, namely a first sub-frame image modulation period, a second sub-frame image modulation period and a third sub-frame image modulation period, wherein the light modulation module is used for carrying out image modulation on the first laser based on the second color data signal in the first sub-frame image modulation period to generate second color image light, carrying out image modulation on the second laser based on the third color data signal in the second sub-frame image modulation period to generate third color image light, carrying out image modulation on the first part of excitation light based on the first color data signal in the third sub-frame image modulation period to generate first color image light, and carrying out image modulation on the infrared light based on the infrared data signals in the first sub-frame image modulation period, the second sub-frame image modulation period and the third sub-frame image modulation period to generate infrared image light.

32. The projection device of claim 31, wherein: the projection device further comprises a light source controller, the data processing module decodes the image data to obtain the first color data signal, the second color data signal and the third color data signal, the data processing module further calculates an infrared data signal based on the first to third color data signals, the signal value of any pixel in the first to third data signals is A, B, C, the brightness of the first part of excitation light provided to the light modulation module, the brightness of the first laser light and the brightness of the second laser light are respectively a, b and c, and the light source controller controls the brightness of the infrared light so that the brightness of the infrared light provided to the light modulation module in three sub-frame image modulation periods is respectively d, e and f, wherein d=α×a; e=α×b; f=α×c, that is, the luminance of the infrared light supplied to the light modulation module in the three sub-frame image modulation periods is α times the luminance of the first to third color lights, respectively.

33. An image display control method applied to the projection apparatus as claimed in any one of claims 21 to 32, comprising the steps of: