CN111610686A

CN111610686A - Light source system, light source assembly, display device and control method thereof

Info

Publication number: CN111610686A
Application number: CN201910133791.8A
Authority: CN
Inventors: 吴超; 余新; 胡飞; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2020-09-01
Also published as: WO2020168812A1

Abstract

The invention provides a light source system applicable to the technical field of projection, which comprises: a light source for emitting M beams of first light; the power distribution device is used for distributing each beam of first light into a plurality of beams of second light to be emitted, or is used for uniformly distributing the input M beams of first light into N beams of second light after being mixed, wherein M is less than N; and an optical switch for adjusting a transmission direction of each of the second lights and obtaining a third light according to a deflection signal obtained from an image signal of an image to be displayed. The invention also provides a light source assembly and a display device comprising the light source system, and a control method applicable to the display device. The light source system provided by the invention can effectively reduce the requirement on the number of the luminous bodies in the light source, is beneficial to simplifying the structure of the light source, can also improve the chromatic aberration, speckles and dead spots caused by inconsistent light emission of the luminous bodies in the light source, and is beneficial to improving the display quality of images.

Description

Light source system, light source assembly, display device and control method thereof

Technical Field

The invention relates to the technical field of projection, in particular to a light source system, a light source assembly, display equipment and a control method of the display equipment.

Background

This section is intended to provide a background or context to the embodiments recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

At present, the projection system mainly has four methods for displaying a High-Dynamic Range (HDR): two-chip spatial Light modulator technology represented by Dolby Vision technology, Barco's dynamic aperture technology, Light steering (Light steering) technology, and local dimming (local dimming) technology similar to that employed by LED backlight LCDs. The local backlight adjusting technology adopts a laser array as a light source of the projection equipment, each laser is responsible for the illumination of one area, and the luminous intensity of the lasers is dynamically controlled according to the peak brightness of each area of a picture during projection display so as to realize high-contrast display. The method avoids unnecessary light energy loss while realizing high contrast, but the light source structure and the modulation process are complicated, and the influence caused by different aging degrees cannot be avoided.

HDR display of the display device can also be achieved using a dual axis scanning mirror. A double-shaft scanning mirror is a device for realizing light beam deflection, a typical double-shaft scanning mirror is a Micro-Electro-Mechanical System (MEMS) optical cross connector, which is mainly used as an all-optical switch and applied to the field of optical communication, light beams entering from an input port array are changed into collimated parallel light beams after passing through a lens array, two Micro-mirror arrays which are parallel to each other form an angle of 45 degrees with the input light beams, and the light beams are mutually exchanged by utilizing two reflections of the Micro-mirror arrays and then vertically emitted to an output port array. The micro mirrors in the micro mirror array are driven by electrostatic force, the deflection angle of the micro mirrors can be accurately controlled by controlling the driving voltage on the corresponding electrodes of each micro mirror, and the micro mirrors have two degrees of freedom in a plane, so that the exchange between any two ports can be realized.

If the biaxial scanning mirror is applied to a light source system and is used for pre-modulating illumination light, the light field distribution irradiated on the spatial light modulator can be conveniently controlled, so that high light efficiency can be obtained on one hand, and HDR display can be realized on the other hand. However, this system has the disadvantage of requiring the number of light source emitters to be consistent with the number of channels of the two-axis scanning mirror. If HDR is to be achieved, more than one hundred partitions are needed, which means more than one hundred luminaires are needed.

Disclosure of Invention

In order to solve the technical problem that a projection system for realizing HDR display by using a biaxial scanning mirror in the prior art has more requirements on the number of luminous bodies in a light source, the invention provides a light source system capable of effectively reducing the requirements on the number of light sources, and also provides a light source assembly, display equipment and a control method thereof.

A first aspect of the present invention provides a light source system comprising:

a light source for emitting M beams of first light;

the power distribution device is used for distributing each beam of first light into a plurality of beams of second light to be emitted, or is used for uniformly distributing the input M beams of first light into N beams of second light after being mixed, wherein M is less than N; and

and an optical switch for adjusting a transmission direction of each of the second lights and obtaining a third light according to a deflection signal obtained from an image signal of an image to be displayed.

A second aspect of the present invention provides a light source assembly comprising:

and each light source system is used for emitting light with different colors simultaneously, and the light rays emitted by the light source systems are emitted from the light source component along the same light path.

A third aspect of the present invention provides a display device comprising:

the control device is used for sending out a deflection signal and a modulation signal according to an image signal of an image to be displayed;

the above light source system, or the above light source assembly; and

and the light modulation device is used for modulating the third light emitted by the light source system according to the modulation signal.

A fourth aspect of the present invention provides a control method of a display device, comprising:

partitioning an image to be displayed according to the output block of the optical switch;

calculating the peak brightness of each subarea in the image to be displayed;

converting the M beams of first light output by the light source into N beams of second light by using a power distribution device;

controlling an optical switch to adjust the propagation direction of each beam of second light according to the peak brightness of each partition and the brightness of the N beams of second light;

and guiding the light emitted by the optical switch to irradiate the light modulation device, and controlling the light modulation device to modulate the incident light according to the image signal of the image to be displayed and the illuminance distribution of the light received by the light modulation device.

The light source system provided by the invention utilizes the power distribution device to distribute the incident light emitted by the M luminous bodies into N emergent light beams to be provided for the optical switch, the number of the luminous bodies in the light source is not required to be consistent with the input port of the optical switch, the requirement on the number of the light sources can be effectively reduced when M is less than N, and the simplification of the light source structure is facilitated. In addition, the light source system can improve chromatic aberration, speckles and dead spots caused by nonuniform light emission of the luminous body in the light source, and is favorable for improving the display quality of images.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments/modes of the present invention, the drawings needed to be used in the description of the embodiments/modes are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments/modes of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display device according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the optical switch shown in fig. 1.

Fig. 3 is a schematic structural diagram of a display device according to a second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a display device according to a third embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a display device according to a fourth embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a display device according to a fifth embodiment of the present invention.

FIG. 7 is a schematic diagram of an illumination field normally directed to a spatial light modulator.

Fig. 8 is an image projected in a normal condition.

FIG. 9 is a schematic illustration of the illumination field directed to a spatial light modulator without a power splitter with one of the emitters damaged.

Fig. 10 is a projected image without a power divider with a defective illuminator.

FIG. 11 is a schematic illustration of the illumination field directed to a spatial light modulator with a power splitter when one of the emitters is defective.

Fig. 12 is a projected image with a power divider with one of the lights broken.

Description of the main elements

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

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The invention provides a light source system beneficial to realizing HDR display, light emitted by the light source system has light and shade distribution, and is beneficial to improving the contrast of an image emitted by display equipment adopting the light source system and enriching the light and shade details and the hierarchical sense of the image.

The light source system provided by the invention can be applied to display equipment, and is particularly suitable for projection equipment such as commercial education projectors, miniature laser projection and cinema projectors. The embodiment of the invention is described by taking the display device as a projection device as an example, and it is understood that the light source system can also be applied to other types of display devices such as a laser television.

Referring to fig. 1-2, a display device 10 according to a first embodiment of the present invention includes a light source system 100, a light modulation device 160, and a control device 800. Wherein, the light source system 100 is used for emitting a premodulated light field with a bright-dark distribution; the light modulation device 160 is used for modulating the light field emitted by the light source system 100; the control device 800 is used for sending out a deflection signal for controlling the optical switch 130 in the light source system 100 and a modulation signal for controlling the light modulation device 160 according to an image signal of an image to be displayed. Through the two-stage modulation of the optical switch 130 and the light modulation device 160 in the light source system 100, a high-contrast HDR display effect can be achieved.

Further, the light source system 100 includes a light source 110, a power distribution device 120, and an optical switch 130. A light source 110 for emitting M beams of first light; a power distribution device 120, configured to divide the M beams of first light into N beams of second light according to a preset manner; the optical switch 130 is configured to adjust a transmission direction of each beam of second light according to the deflection signal, so that the adjusted second light exits from the corresponding output channel and obtains third light. N and M may be the same or different.

In the present embodiment, a laser is taken as an example of the light source 110, the light source 110 includes M light emitters 111, and each light emitter 111 is configured to emit a first light beam; in other embodiments, other types of Light sources may also be used, some examples being arc lamp Light sources, Light Emitting Diode (LED) Light sources, fluorescent Light sources, and the like. The light source 110 may be white light, blue light, green light, red light, ultraviolet light, or the like. The light source 110 comprises at least one light emitter 111, each light emitter 111 comprises one, two lasers or laser arrays, and the number of the lasers can be selected according to actual needs.

As shown in fig. 1, the power distribution apparatus 120 includes: a plurality of input waveguides 121, a power distribution region 122, and a plurality of output waveguides 123. Each beam of first light emitted from the light source 110 enters the power distribution region 122 through one input waveguide 121, and each beam of second light after being uniformly mixed and distributed is output by one output waveguide 123. In this embodiment, the M beams of the first light are directly distributed or mixed in the power distribution region 122 and then uniformly redistributed into N beams of the second light. In one embodiment, the power distribution device 120 includes a multi-stage power divider, and each stage of power divider can divide each beam of light output from the previous stage into at least two beams of light output again according to a preset ratio. For example, the first stage power splitter splits one beam of the first light into 2 beams of the first light at a preset ratio, the second stage power splitter splits the 2 beams of the first light output from the first stage power splitter into 2 beams of the first light again at a preset ratio, and so on to obtain 4 beams of the first light … ….

The input waveguide 121 and the output waveguide 123 may be optical fibers or waveguides, and the frequency, the polarization state, and the transmission direction of the light beams transmitted by the input waveguide 121 and the output waveguide 123 may be the same or different, that is, the two may be single-mode or multi-mode in terms of transmission mode. Because the power distribution device 120 can convert the M beams of first light into N beams of second light, when M is less than N, the requirement for the number of the light emitters 111 in the light source 110 can be greatly reduced, and the number of the light emitters 111 can be less than the number of the input ports of the optical switch 130, which is beneficial to reducing the volume of the system, reducing the cost of the light source system, and improving the heat dissipation performance.

As shown in fig. 2, in the present embodiment, the optical switch 130 is described by taking a biaxial scanning mirror as an example; in other embodiments, other devices or components may be used to implement the functionality of the optical switch, such as a beam splitter or the like. Optical switch 130 includes an input 131, a first deflection member 132, a second deflection member 133, and an output 134. Wherein the input end 131 comprises one or more input channels 131a, the output end 134 comprises one or more output channels 134a, the first deflection member 132 comprises one or more first deflection units 132a, and the second deflection member 133 comprises one or more second deflection units 133 a. Each beam of second light enters the optical switch 130 through one input channel 131a and then is incident on the first deflection unit 132a corresponding to the first deflection component 132. According to the deflection signal sent by the control device 800, each first deflection unit 132a reflects each received second light beam to the second deflection unit 133a of the second deflection component 133, and the second deflection component 133 reflects each second light beam to the corresponding output channel 134a according to the deflection signal sent by the control device 800, thereby implementing the first modulation of the light field. The first deflection unit 132a and the second deflection unit 133a may be micro mirrors, and deflect light according to a deflection signal from the control device 800.

As shown in fig. 1, the light modulation device 160 is configured to modulate the third light emitted from the optical switch 130 in the light source system 100 according to the modulation signal. The third light is incident to the light modulation device 160 after being relayed, the light modulation device 160 performs secondary modulation on the third light, and the light after the secondary modulation is projected onto the screen through the projection lens 140. Specifically, some examples of the light modulation Device 160 are a Digital Micro-mirror Device (DMD), a Liquid Crystal On Silicon (LCOS), a Liquid Crystal Display (LCD) panel.

In one embodiment, the control device 800 is used for sending a deflection signal to the optical switch 130 and a modulation signal to the light modulation device 160 according to an image signal of an image to be displayed, and is further used for sending a light quantity signal for adjusting the light emitting power of the light source 110 according to the brightness data of the image to be displayed. Since the brightness of the images of different frames is different and the luminous flux required by each frame of image is also different, the control device 800 can send out a light quantity signal to adjust the light emitting power of the light source, so that the luminous flux entering the power distribution device 120 can meet the display brightness requirement of the image of the current frame, thereby achieving the effect of saving energy.

In addition, the light source system 100 in the embodiment of the present invention further includes a guiding element known in the art, such as a relay lens, a prism, etc., which are not illustrated herein.

In this embodiment, the power distribution device 120 is configured to uniformly distribute the power of the M beams of first light input and obtain N beams of second light, that is, the M beams of first light entering from the input waveguide 121 are uniformly mixed and distributed into N beams of second light. The advantages of incorporating the power distribution device 120 in the structural design of the light source 110 include, in addition to the advantages of reducing the number of the light emitters 111: when one or more of the M luminous bodies 111 in the light source 110 is defective, since the second light received by the optical switch 130 is uniformly redistributed by the power distribution device 120, the image only has an overall brightness reduction, and no dead pixel occurs. In addition, when each light source illuminant 111 is responsible for illumination of one block, the requirement of the system on the consistency of the light emitting wavelength of the light source is higher, and visible chromatic aberration is caused by the inconsistency of the light emitting wavelength caused by inconsistency of light source type selection, working current and aging; and laser speckle caused by the difference of the central wavelength of the first light emitted by the light source 110 can also be eliminated by the power distribution device, so that the speckle phenomenon is improved.

Referring to fig. 3, the display device 20 according to the second embodiment of the present invention mainly differs from the display device 10 in that: the display apparatus 20 includes a light source assembly 200, and the light source assembly 200 includes 3

light source systems

200a, 200b, 200 c. The technical solutions applied to the light source system 100 are all applied to the

light source systems

200a, 200b, and 200c, and the display device 20 further includes a control device 810 and a light modulation device 260. The

light sources

210a, 210b, and 210c of the

light source systems

200a, 200b, and 200c emit first lights of different colors at the same time, and the first lights of three colors of red, green, and blue will be described as an example in this embodiment. In other embodiments, the number of the light source systems included in the light source module may not be limited to 3, the number of the light source systems may be adjusted according to actual conditions, and the first light emitted by the light source in each light source system may be yellow, orange, purple, or other colors.

In this embodiment, the light modulation device 260 is a three-chip liquid crystal panel (abbreviated as 3LCD), and includes

liquid crystal chips

260a, 260b, and 260c, the third lights of three colors of red, green, and blue simultaneously emitted from the

light source systems

200a, 200b, and 200c are respectively directly incident or are guided by a reflection element and then respectively incident to the

liquid crystal chips

260a, 260b, and 260c, the

liquid crystal chips

260a, 260b, and 260c respectively control the transmittance of the third lights of three colors of red, green, and blue according to the modulation signal emitted by the control device 810, the third lights of three colors of red, green, and blue are respectively modulated by the light intensities of the

liquid crystal chips

260a, 260b, and 260c and then combined to be emitted to the projection lens 240, so as to generate a modulated image with different gray levels and colors, and improve the coverage rate of the color gamut space.

Referring to fig. 4, a display device 30 according to a third embodiment of the present invention mainly differs from the display device 10 in that: the light source 310 in the display device 30 includes light emitters of 3 colors, and the light emitters in this embodiment include

light emitters

311a, 311b, and 311c emitting red, blue, and green, respectively. In other embodiments, the number of the light emitters may not be limited to 3, the number of the specific light source systems may be adjusted according to actual situations, and the first light emitted by the light emitters may be yellow, orange, purple, or other colors.

The first light emitted from the

light emitters

311a, 311b, and 311c enters the power distribution device 320 in time sequence, and the second light emitted from the power distribution device 320 is modulated by the optical switch 330 and the light modulation device 360 to obtain the light fields of red, blue, and green light emitted in time sequence. By utilizing the visual persistence characteristic of human eyes, the modulated light field distribution can obtain a color image after being emitted by the projection lens, thereby improving the coverage rate of a color gamut space and being beneficial to simplifying the system structure.

Referring to fig. 5, a display device 40 according to a fourth embodiment of the present invention mainly differs from the display device 10 in that: a wavelength conversion device 700 is disposed between the optical switch 430 and the optical modulation device 460, and the wavelength conversion device 700 is configured to perform wavelength conversion on the third light emitted from the optical switch 430 to obtain the excited light.

In this embodiment, the light source 410 is a blue laser light source; in other embodiments, other types of light sources such as arc lamp light sources, LED light sources, fluorescent light sources, etc. may be used, and the color of the light source 410 may be white light, blue light, green light, red light, ultraviolet light, etc.

The wavelength conversion device 700 in this embodiment is a color wheel, and includes a substrate, a phosphor segment disposed on the substrate, and a driving unit. The driving unit is used for driving the color wheel to rotate periodically. The phosphor section includes a plurality of sections, each section being provided with a wavelength converting material or a scattering material of a different color, respectively. In this embodiment, a red phosphor, a green phosphor, and a blue scattering material are provided in the first segment, the second segment, and the third segment, respectively. Under the driving of the driving unit, the first segment, the second segment and the third segment are alternately located on the light path of the third light emitted from the optical switch 430, under the excitation of the third light, each segment on the color wheel emits the excited light with the corresponding color according to the time sequence, and the excited light passes through the wavelength conversion device 700, is collimated and is incident on the light modulation device 460.

Compared with the mode of using pure laser as a Light source to realize color projection display, the method can effectively reduce the using amount of the lasers, thereby reducing the cost, and is more suitable for an imaging system with a simpler imaging structure (such as a single-chip Digital Light Processing (DLP) imaging system), and is favorable for improving the compactness of structural design.

Referring to fig. 6, a display device 50 according to a fifth embodiment of the present invention mainly differs from the display device 40 in that: a light splitting element 900 is further disposed between the optical switch 530 and the wavelength conversion device 720, the light splitting element 900 is configured to guide the third light emitted from the optical switch 530 to enter the wavelength conversion device 720, and is configured to guide the laser light reflected from the wavelength conversion device 720 to exit from the light splitting element 900 and then enter the light modulation device 560, and the laser light is modulated by the light modulation device 560 and then exits to the projection lens 540. The light splitting element 900 includes a first region for guiding the third light output from the optical switch 530 and a second region for guiding the transmission of the received laser light, and specifically, the first region is coated with a blue-transparent anti-yellow film, the second region is coated with a total reflection film, and the first region and the second region do not overlap. In one embodiment, the first region of the light splitting element 900 is hollowed out, and the second region is provided with a reflective film.

The optical path emitted from the optical switch 530 in the light source system 500 is focused and then enters the first region of the optical splitter 900, and the third light is transmitted from the optical splitter 900 and then is relayed and projected onto the wavelength converter 720. The excited light generated by the wavelength conversion device 720 is collimated and then incident on the spectroscopic element 900 and reflected to the light modulation device 560. The wavelength conversion device 720 in this embodiment is more flexible in position relative to other components of the system, and is particularly suitable for an imaging system with a complex imaging structure (e.g., a three-piece DLP imaging system), which can effectively reduce the volume of the system; in addition, the embodiment can also form better heat dissipation design and effect.

It should be noted that, within the scope of the spirit or the basic features of the present invention, the embodiment applied to the display device in the first embodiment can be correspondingly applied to the second, third, fourth and fifth embodiments, and therefore, for brevity and avoiding repetition, detailed description is omitted here.

The present invention also provides a control method of a display device, which can be applied to the display device of each of the above embodiments, and the display device of each of the above embodiments can also be applied to the control method of the display device, and specifically includes the following steps:

s1: and partitioning the image to be displayed according to the output block of the optical switch. Each output block of the optical switch corresponds to an area illuminated by emergent light of at least one output channel, and each output block can be square, strip, circle or other irregular shapes.

S2: acquiring the peak brightness of each subarea in an image to be displayed; in one embodiment, the luminance information in the image signal of each frame of the image to be displayed includes the above-mentioned peak luminance, or the peak luminance of each partition is calculated from the luminance information of the image signal.

S3: and controlling the power of the corresponding luminous body in the light source according to the peak brightness of each subarea. In another embodiment, the power of all the luminaries is consistent, and the power of the corresponding luminaries in the light source is controlled according to the average value of the peak brightness of each subarea.

S4: the M beams of first light output by the light source are converted into N beams of second light by the power distribution device. The power distribution device is used for distributing each beam of first light into a plurality of beams of second light to be emitted; or the power distribution device is used for mixing the input M beams of first light and then redistributing the mixed light into N beams of second light for emergence.

S5: and controlling the optical switch according to the peak brightness of each subarea and the brightness of the N beams of second light to adjust the propagation direction of each beam of second light and obtain a light field with a specific brightness distribution.

S6: and the light emitted by the optical switch is guided to irradiate the light modulation device, and the light modulation device is controlled to modulate the incident light according to the image signal of the image to be displayed and the illuminance distribution of the light received by the light modulation device. Wherein the light modulation device compensates the brightness of each pixel of the image to be displayed by the predicted light intensity distribution on the spatial light modulator.

In an embodiment, the optical switch is slower in turning speed, the number of the partitions of the image to be displayed can be set to be smaller than the number N of the beams of the second light, and the optical switch adjusts the propagation direction of the second light corresponding to the partition of the next image frame in advance during the current image frame, so as to shorten the adjustment period of the optical switch for the second light path corresponding to the partition of each image to be displayed. In another embodiment, the optical switch is turned over at a fast speed, the number of the sub-regions of the image to be displayed is set to be greater than the number N of the second light beams, and the optical switch adjusts at least a part of the second light beams to be respectively incident into different sub-regions during the current image frame, so as to avoid dark spots caused by insufficient incident light corresponding to part of the sub-regions.

For a better understanding of the practical effects of the present invention, please refer to fig. 7 to 12, wherein fig. 7 is a diagram illustrating an illumination light field normally illuminating a spatial light modulator, and a projected image is shown in fig. 8. Fig. 9 shows the illumination field without power divider and with a damaged illuminant, which is directed to the spatial light modulator, and the projected image is as shown in fig. 10, from which it can be seen that there is a dark spot, i.e. a projected dead spot, at the position corresponding to the damaged illuminant. Fig. 11 is a diagram of an illumination field with a power divider directed toward a spatial light modulator when a light is broken, and it can be seen that the brightness of the field is somewhat reduced, but there is no dead spot area, so that the final projected image is only reduced in brightness, but no projected dead spot appears, as shown in fig. 12. As can be seen from fig. 7-12, when one or more of the luminaries in the light source have a problem, the second light received by the optical switch is uniformly redistributed by the power distribution device, so that the image only has an overall brightness reduction, and no dead pixel occurs, which is beneficial to improving the quality of the projected image when the light source has a problem.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several of the means recited in the apparatus claims may also be embodied by one and the same means or system in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A light source system, comprising:

a light source for emitting M beams of first light;

2. The light source system of claim 1, wherein the power splitting means comprises a multi-stage power splitter, each stage of power splitter splitting each beam of light output from a previous stage into at least two beams of light output at a predetermined ratio.

3. The light source system of claim 1, wherein the light source comprises a first light emitter, a second light emitter and a third light emitter for emitting a first primary light, a second primary light and a third primary light, respectively, and the first primary light, the second primary light and the third primary light are incident to the power distribution device in a time sequence.

4. The light source system according to claim 1, wherein the light source system further comprises a wavelength conversion device for wavelength-converting the third light and obtaining the stimulated light.

5. The light source system of claim 1, wherein the optical switch is a two-axis scanning mirror.

6. A light source module comprising a plurality of light source systems according to any of claim 1, each light source system being adapted to emit light of a different color simultaneously, the light rays emitted by the plurality of light source systems exiting the light source module along the same light path.

7. A display device, comprising:

the light source system of any one of claims 1 to 5, or the light source assembly of claim 6; and

8. The display device of claim 7, wherein the display device further comprises:

the control device is also used for sending a light quantity signal for adjusting the power of the light source according to an image signal of an image to be displayed; and

and the power adjusting device is used for adjusting the light emitting power of the light source according to the light quantity signal emitted by the control device.

9. A control method of a display device, characterized by comprising the steps of:

calculating the peak brightness of each subarea in the image to be displayed;

10. The method for controlling a display device according to claim 9, wherein before the converting the M beams of first light output from the light source into N beams of second light using the power dividing means, further comprising:

and controlling the power of the corresponding luminous body in the light source according to the peak brightness of each subarea.

11. The method of controlling a display device according to claim 9, wherein the number of partitions of an image to be displayed is smaller than the number N of beams of the second light, and the optical switch adjusts the traveling direction of the second light corresponding to the partition of the next image frame in advance during the current image frame.

12. The method of controlling a display device according to claim 9, wherein the number of divided areas of the image to be displayed is greater than the number N of beams of the second light, and the optical switch adjusts at least a part of the beams of the second light to be respectively incident to different divided areas during the current image frame.