Display system and display control method

Abstract

The present invention relates to the technical field of display. Disclosed are a display system and a display control method. According to the present invention, using a light mixing scheme in terms of timing can achieve the mixing of narrow-spectrum light and broad-spectrum light, and achieve a natural grayscale to color transition. By means of the configuration of the present invention, the display system can be configured to have different modes, such as, one mode having low white brightness but high pure color brightness, suitable for a cinema mode, and the other mode having high white brightness but low pure color brightness and high mixed color brightness, suitable for an office mode; the different modes may further include a mode between the described two modes; thus, the display system is suitable for different application scenarios. Additionally, the display system is also compatible with a wide-color-gamut low-brightness mode and a low-color-gamut high-brightness mode, and has no laser speckle trouble and no color fringing problem, greatly improving the user experience.

Description

Display system and display control method Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display system and a display control method. Background Art

[0002] Projectors are widely used in a variety of situations, such as office presentations, film and television broadcasts, and art installations. Current projector light sources include lasers, LEDs, and fluorescent light sources. Monochromatic lasers can excite fluorescence, resulting in high brightness but poor color quality. Trichromatic lasers, on the other hand, offer high color quality but suffer from color fringing, speckle reduction, and high cost. A hybrid solution leverages the strengths of both, boosting brightness while addressing color fringing and speckle, ultimately improving user comfort.

[0003] Summary of the Invention

[0004] Hybrid light source solutions in the display field include both narrow-spectrum light sources, such as lasers, and broad-spectrum light sources, such as fluorescent or LEDs. The ability to achieve sequential control of multiple colors, achieve natural grayscale transitions, and enhance brightness while simultaneously controlling media playback quality is of great value. In light of this, the present invention provides a display system and display control method.

[0005] In a first aspect, the present invention provides a display system comprising a timing subsystem and a light modulation device, wherein the light modulation device is configured to modulate light from a light source into image light;

[0006] The timing subsystem includes:

[0007] a light source device for generating light source light, wherein the light source light comprises at least a first light, a second light, and a third light, wherein the first light is light of a narrow spectrum, the second light is light of a broad spectrum, and the third light comprises light of a narrow spectrum or a broad spectrum, and the first light and the second light have the same color, or the spectrum of the second light at least includes the spectrum of the first light;

[0008] A mode switching module is used to determine a target display mode, where the target display mode includes mode one or mode two. When the mode switching module determines that the target display mode is mode one, the output time of the first light is consistent with the output time of the second light, and the output time of the third light does not overlap with the output time of the first light; when the mode switching module determines that the target display mode is mode two, the output time of the first light is greater than, less than, or equal to the output time of the second light, and the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light.

[0009] In a second aspect, the present invention provides a display system comprising a color gamut subsystem and a light modulator, wherein the light modulator is configured to modulate light from a light source into image light;

[0010] The color gamut subsystem includes:

[0011] a color gamut adjustment module, configured to obtain target parameters based on an original color gamut of the light source and a target color gamut corresponding to a target display mode, wherein the target parameters include target color coordinates and target brightness gains of red light, green light, blue light, and white light, or target color coordinates and target brightness gains of red light, green light, blue light, and white light, and target color coordinates and target brightness gains of at least one of cyan light, magenta light, and yellow light;

[0012] A control module is used to control the light modulation device according to original parameters and the target parameters, wherein the original parameters include original color coordinates and original brightness ratios of red light, green light, blue light and white light corresponding to the original color gamut.

[0013] In a third aspect, the present invention provides a display control method, applied to a display system, wherein the display system includes a light source device for generating light source light, the method comprising:

[0014] Controlling the light source device to generate light source light, wherein the light source light includes at least a first light, a second light, and a third light, wherein the first light is light of a narrow spectrum, the second light is light of a broad spectrum, and the third light includes light of a narrow spectrum or a broad spectrum, and the first light and the second light have the same color, or the spectrum of the second light at least includes the spectrum of the first light;

[0015] Timing control process, where

[0016] The timing control process includes:

[0017] Determining a target display mode, wherein the target display mode includes mode 1 or mode 2;

[0018] When the target display mode is determined to be mode one, the output time of the first light is controlled to be consistent with the output time of the second light, and the output time of the third light does not overlap with the output time of the first light; when the target display mode is determined to be mode two, the output time of the first light is controlled to be greater than or less than or equal to the output time of the second light, and the output time of the first light is at least partially overlapped with the output time of the second light, and the output time of the third light is at least partially overlapped with the output time of the first light.

[0019] In a fourth aspect, the present invention provides a display control method applied to a display system, wherein the display system includes a light source device for generating light source light, the method comprising:

[0020] Controlling the light source device to generate light source light, wherein the light source light includes at least a first light, a second light, and a third light, wherein the first light is light of a narrow spectrum, the second light is light of a broad spectrum, and the third light includes light of a narrow spectrum or a broad spectrum, and the first light and the second light have the same color, or the spectrum of the second light at least includes the spectrum of the first light;

[0021] Color gamut control process, where

[0022] The color gamut control process includes:

[0023] Obtaining target parameters based on an original color gamut of the light source and a target color gamut corresponding to a target display mode, the target parameters including target color coordinates and target brightness gains of red light, green light, blue light, and white light, or including target color coordinates and target brightness gains of red light, green light, blue light, and white light, and target color coordinates and target brightness gains of at least one of cyan light, magenta light, and yellow light;

[0024] The light modulation device is controlled according to original parameters and the target parameters, where the original parameters include original color coordinates and original brightness ratios of red light, green light, blue light, and white light corresponding to the original color gamut.

[0025] The present invention obtains target parameters based on the original color gamut of the light source light generated by the light source device and the target color gamut corresponding to the target display mode, and then controls the light modulation device based on the original parameters and these target parameters, which can improve color accuracy and enhance the display effect. In addition, the present invention adopts a mixed light scheme in timing to achieve a mixture of narrow-spectrum light and wide-spectrum light, and achieve a natural transition between grayscale and color scale. Through the configuration of the present invention, the display system can be set to different modes, such as one mode with low white field brightness but high pure color brightness, suitable for theater mode, and another mode with high white field brightness but low pure color brightness and high mixed color brightness, suitable for office mode. It can also include modes between the two and is suitable for different application scenarios. At the same time, the display system is also compatible with wide color gamut low brightness mode and low color gamut high brightness mode, without the problem of laser speckle and color fringing, which can greatly improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of functional modules of a display device provided by an embodiment of the present invention;

[0027] Figures 2(a) and 2(b) are schematic structural diagrams of a display device provided in an embodiment of the present invention;

[0028] FIG3 is a schematic flow chart of a display control method provided by an embodiment of the present invention;

[0029] 4-5 are schematic diagrams of a method for determining RGB target color coordinates provided in an embodiment of the present invention;

[0030] 6 to 18 are schematic diagrams of the output timing of each light according to an embodiment of the present invention;

[0031] FIG19 is a schematic structural diagram of a light source device provided by an embodiment of the present invention;

[0032] 20 to 31 are schematic diagrams of the lighting time of each light source provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Although the disclosure in the present invention is introduced according to one or more exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete technical solution independently. In the absence of conflict, the features in the following embodiments and embodiments can be combined with each other.

[0034] In the present invention, in order to facilitate the clear description of the technical solutions of the embodiments of the present invention, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order. They are only used to illustrate and distinguish the objects to be described. There is no distinction in order, nor do they represent a special limitation on the number of devices or messages in the embodiments of the present invention, and they cannot constitute any limitation on the embodiments of the present invention. "Multiple" means two or more, and words such as "include" or "comprising" mean that the element or object appearing before the word includes the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0035] In order to fully understand the present invention, a detailed description will be provided below to illustrate the technical solution of the present invention. Preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0036] FIG1 is a schematic diagram of the functional modules of a display device provided by an embodiment of the present invention. As shown in FIG1 , the display device includes an image processor 101 and an optical engine 102.

[0037] Image processor 101 may be a microcontroller, a dedicated image processing chip, or the like. The microcontroller may be an ARM chip, a microcontroller unit (MCU), or the like. The dedicated image processing chip may be an image signal processor (ISP), a graphics processing unit (GPU), or an embedded neural network processing unit (NPU). Image processor 101 may be used for video decoding, image quality processing, and the like.

[0038] The optical engine 102 may include a driver chip, a light modulator, and a light source. The light source may include a laser, LED, fluorescent, or UV light source. The light modulator may be a digital micromirror device (DMD), a liquid crystal display (LCD), or a liquid crystal on silicon (LCOS) device, and is used to modulate the light from the light source to produce image light. The driver chip corresponds to the light modulator. For example, the digital micromirror device can be driven by a digital light processing (DLP). The optical engine 102 is used to project the image to be projected onto a projection screen.

[0039] In some embodiments, the display device further includes a central controller 103 with one or more processing cores. This central controller can be a CPU, ARM, MCU, or other controller. Central controller 103 is the control center of the display device, connecting various components of the entire display device using various interfaces and circuits. It can run or execute software programs and / or operating systems stored in storage module 104, as well as access data stored in storage module 104. Alternatively, image processor 101 and central controller 103 can be integrated into a single processor.

[0040] In some embodiments, the display device further includes a storage module 104 of one or more computer-readable storage media, an input module 105, a communication module 106, a power supply 107, and other components. Those skilled in the art will appreciate that the display device structure shown in FIG1 does not limit the display device, and may include more or fewer components than shown, or combine certain components, or arrange the components differently. Among them:

[0041] The storage module 104 can be used to store software programs and operating systems. The central controller 103 executes various functional applications and data processing by running the software programs and operating systems stored in the storage module 104. The storage module 104 can mainly include a program storage area and a data storage area. The program storage area can store the operating system, at least one application required for a function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created based on the use of the display device, etc. In addition, the storage module 104 can include a high-speed random access memory and a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. Accordingly, the storage module 104 can also include a memory controller to provide the central controller 103 with access to the storage module 104.

[0042] The display device may further include an input module 105, which may be configured to receive input digital or character information and generate remote control, keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0043] The display device may also include a communication module 106. In some embodiments, the communication module 106 may include a wireless module. The display device may perform short-range wireless transmission via the wireless module of the communication module 106, thereby providing the user with wireless broadband Internet access. For example, the communication module 106 may be used to help the user access streaming media, etc.

[0044] The display device also includes a power supply 107 for supplying power to various components. In some embodiments, the power supply 107 can be logically connected to the central controller 103 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 107 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.

[0045] Figures 2(a) and 2(b) are schematic diagrams of the structure of a display device provided in an embodiment of the present invention. As shown in the figure, the display device includes a light source device 201, an illumination system 202, a light modulation device 203, and an imaging system 204. The light source light generated by the light source device 201 is irradiated onto the light modulation device 203 via the illumination system 202. The light modulation device 203 modulates the incident light source light into image light, which is then irradiated into the imaging system 204. The image light is finally imaged onto a projection object such as a screen, forming a projection image. The light modulation device 203 can be any one of a DMD, an LCOS, and an LCD; the imaging system 204 is generally a lens system, such as a projection lens.

[0046] In addition, the display device may also include a light source control module (not shown in the figure) that can control the operation of one or more light sources in the light source device 201 so that the light source device 201 emits light in a specified wavelength band required for image generation. Furthermore, the light source device 201, the illumination system 202, the light modulation device 203, and the imaging system 204 may all be included in the optical engine 102 (see Figure 1).

[0047] The light source device 201 is used to generate light source light and may include one or more light sources. The light source may be a laser light source, an LED light source, a fluorescent light source, or a UV light source, etc. Furthermore, the light source may be a single light-emitting element or a light-emitting element array, and the light-emitting element array may include light-emitting elements of different colors. For example, the light source may be an LD light source or an LED light source that generates blue light, green light, or red light, etc., or the light source may be a multi-color laser, that is, a light-emitting element array that includes multiple lasers, such as a blue laser and a red laser, or a blue laser and a green laser, or a blue laser, a red laser, and a green laser at the same time.

[0048] In a display device using a mixed light solution, the light source light generated by the light source device 201 includes at least a narrow spectrum light and a broad spectrum light. For example, the light source light includes a first light and a second light, the first light being a narrow spectrum light and the second light being a broad spectrum light. Furthermore, the light source light may also include a third light, the third light including a narrow spectrum light or a broad spectrum light, the first light and the second light being the same color, or the spectrum of the second light at least including the spectrum of the first light, such as the first light and the second light being red or green, the third light including blue light and green light, or the first light being red or green, the second light being yellow, and the third light being blue light. It should be understood that the light source light may also include more light, and this is not limited in the embodiments of the present invention.

[0049] The illumination system 202 is a part extending from the light source device 201 to the light modulation device 203 , and is configured to illuminate the light emitted by the light source device 201 onto the light modulation device 203 . For example, the illumination system 202 may include one or more lenses.

[0050] In a display device, the original color gamut of the light source light generated by the light source device 201 does not provide a good display effect. For example, the original color gamut may be very large. In some scenarios, an excessively large color gamut can cause the colors of the displayed image to be distorted or too glaring, affecting the user experience. In some embodiments, the display device may also include a color gamut subsystem that performs debugging based on the original color gamut to improve the display effect. Referring to Figure 2(b), the display device may include a color gamut adjustment module 212 and a control module 213. The color gamut adjustment module 212 is configured to obtain target parameters based on the original color gamut of the light source light and the target color gamut corresponding to the target display mode. The target parameters include target color coordinates and target brightness gains for red light, green light, blue light, and white light, or target color coordinates and target brightness gains for red light, green light, blue light, and white light, and target color coordinates and target brightness gains for at least one of cyan light, magenta light, and yellow light. The control module 213 is configured to control the light modulation device 203 based on the target parameters obtained by the color gamut adjustment module 212 to achieve the target requirements.

[0051] FIG3 is a flow chart of a display control method provided by an embodiment of the present invention. As shown in FIG3 , the display control method includes:

[0052] S1001. Obtain target parameters based on the original color gamut of the light source and the target color gamut corresponding to the target display mode, where the target parameters include target color coordinates and target brightness gains of red light (R), green light (G), blue light (B), and white light (W), or include the target color coordinates and target brightness gains of red light, green light, blue light, and white light and the target color coordinates and target brightness gain of at least one of cyan light (C), magenta light (M), and yellow light (Y). In the embodiments of the present invention, red light here refers to light when only a light source that generates light containing a red light spectrum is turned on; green light refers to light when only a light source that generates light containing a green light spectrum is turned on; blue light refers to light when only a light source that generates light containing a blue light spectrum is turned on; cyan light refers to light obtained by mixing green light and blue light, or light that remains through human vision when a light source that generates green light is turned on at a previous moment and a light source that generates blue light is turned on at a subsequent moment, or light that is obtained when a light source that generates green light and a light source that generates blue light are turned on at the same time; magenta light refers to light obtained by mixing red light and blue light, or light that remains through human vision when a light source that generates red light is turned on at a previous moment and a light source that generates blue light is turned on at a subsequent moment. It can also be the light obtained by lighting a light source that generates red light and a light source that generates blue light at the same time; yellow light refers to the light obtained by mixing red light and green light, or the light remaining through human vision when a light source that generates red light is lit at the previous moment and a light source that generates green light is lit at the next moment, or it can be the light obtained by lighting a light source that generates red light and a light source that generates green light at the same time. For example, the main wavelength range of red light is 600-660nm, the main wavelength range of blue light is 440-460nm, the main wavelength range of green light is 500-580nm, the main wavelength range of yellow light is 580-595nm, the main wavelength range of cyan light is 470-500nm, and the main wavelength range of magenta light is 580-600nm.

[0053] The original color gamut of the display device can be obtained by measurement, and then the measurement data is stored in the display device, that is, the Y (brightness) and xy (color coordinates) values ​​of RGBW are known. In the embodiment of the present invention, the original parameters include the original color coordinates and original brightness ratios of RGBW. The original brightness ratio of the four RGBW is equal to the ratio of their respective original brightness to the original brightness of W. For example, the original brightness ratio of R is equal to the original brightness Y of R. B The original brightness Y of W W The original brightness ratio of W is equal to 1. Using the original brightness ratio instead of the original brightness improves accuracy. Optionally, the original color gamut may also include at least one of CMY, and the original parameters may also include the original color coordinates and original brightness ratio of at least one of CMY, which can also be obtained through measurement.

[0054] Once the display mode is determined, the target color gamut is also determined. For example, the target color gamut corresponding to mode 1 is the P3 color gamut, and the target color gamut corresponding to mode 2 is the Rec709 color gamut. The display device can select the corresponding display mode or target color gamut as needed, or the user can select the display mode or target color gamut. In other embodiments, the target color gamut of the display device can also be fixed, that is, the display device has only one target color gamut.

[0055] The target parameters may include only the target color coordinates and target brightness gain of RGBW. Optionally, the target parameters may also include the target color coordinates and target brightness gain of any one of CMY to further improve color accuracy. The embodiment of the present invention is described in detail using the example of target parameters including the target color coordinates and target brightness gain of RGBCMYW. Here, R represents red light, G represents green light, B represents blue light, C represents cyan light, M represents magenta light, and Y represents yellow light. The color coordinates are represented by (x, y).

[0056] In some embodiments, the target brightness gain of W is set to 1, and the target white field color point is consistent with the original white field color point, that is, the target color coordinates of W are consistent with the original color coordinates, the white balance state is not changed, and the brightness before and after the color gamut adjustment remains unchanged.

[0057] Furthermore, the target color coordinates and target brightness gain of RGB can be obtained based on the original color coordinates and original brightness of RGB corresponding to the original color gamut and the color coordinates of RGB corresponding to the target color gamut. Then, the target color coordinates and target brightness gain of CMY can be obtained based on the target color coordinates and target brightness of RGB. Optionally, the target brightness gain of CMY can be set to a constant N, with a value range of N from 0 to 2, and preferably, N is equal to 1. A specific algorithm is exemplified below.

[0058] 1. Calculate the RGB target color coordinates.

[0059] Specifically, the target color coordinates of RGB are determined according to the intersection of the original color gamut and the target color gamut, where the target color coordinates of R are the coordinates corresponding to the point with the largest x value in the intersection; the target color coordinates of G are the coordinates corresponding to the point with the largest y value in the intersection; and the target color coordinates of B are the coordinates corresponding to the point with the smallest sum of x and y values ​​in the intersection.

[0060] FIG4 and FIG5 are schematic diagrams of a method for determining the target color coordinates of RGB provided in an embodiment of the present invention. As shown in FIG4 and FIG5, in the polygon vertex sets of the two triangles of the original color gamut and the target color gamut, the one with the largest y value is the target color point G, the one with the largest x value is the target color point R, and the one with the smallest x+y value is the target color point B, thereby determining the target color coordinates R(x RT ,y RT ),G(x GT,y GT ),B(x BT ,y BT ).

[0061] 2. Calculate the target brightness gain of RGB.

[0062] According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and first brightness of R, the target maximum brightness Y of R is obtained. max_R According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and second brightness of G, the target maximum brightness Y of G is obtained max_G According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and third brightness of B, the target maximum brightness Y of B is obtained. max_B According to the target color coordinates and target maximum brightness of RGB and the target color coordinates and target brightness of W, the target brightness gain M of RGB is obtained. R 、 M G 、M B , where the first brightness, the second brightness, and the third brightness are assumed intermediate values; the target maximum brightness is the maximum brightness after the original RGB is mixed to the RGB target color point. This ensures that the brightness of W obtained by the RGB combined light after color gamut adjustment is equal to the target brightness of W.

[0063] In the embodiment of the present invention, it is assumed that the first brightness, the second brightness and the third brightness are all 100; the original brightness color points of RGB are R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3); the target brightness color points of RGB are R(Y' RT , x RT ,y RT ),G(Y' GT , x GT ,y GT ),B(Y' BT , x BT ,y BT ), where Y' RT 、Y' GT 、Y' BT The values ​​are all 100, then the target maximum brightness Y of R max_R The calculation method of M is as follows: 01 =y1*((x RT -x3)*y2-(y RT -y3)*x2+x3*y RT -x RT *y3) / (y RT *((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2)) M 02=-y2*((x RT -x3)*y1-(y RT -y3)*x1+x3*y RT -x RT *y3) / (y RT *((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2)) M 03 =y3*((x2-x1)*y RT -(y2-y1)*x RT +x1*y2-x2*y1) / (y RT *((x2-x1)*y3-(y2-y1)*x3+x1*y2-x2*y1)) M1=M 01 *Y' RT / Y1 M2=M 02 *Y' RT / Y2 M3=M 03 *Y' RT / Y3 M max =max(M1, M2, M3) Y max_R =M1 / M max *Y1+M2 / M max *Y2+M3 / M max *Y3

[0064] Similarly, the target maximum brightness Y of GB can be calculated max_G 、Y max_B , just change the target brightness color point (Y' RT , x RT ,y RT ) is replaced by the target brightness color point (Y' GT , x GT ,y GT ), B(Y' BT , x BT ,y BT ) Then replace the original RGB brightness color point R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3) in the above formula with the target maximum brightness color point R(Y max_R , x RT ,y RT ),G(Y max_G , x GT ,y GT ),B(Y max_B , x BT ,y BT ), the target brightness color point of R (Y' RT , x RT ,y RT) is replaced by the target brightness color point (Y WT , x WT ,y WT ), we can get the target brightness gain M of RGB R 、M G 、M B .

[0065] Furthermore, the target brightness gain M of RGB can be used. R 、M G 、M B Get the actual target brightness Y of RGB RT 、Y GT 、Y BT , where Y RT =M R *Y max_R , Y GT =M G *Y max_G , Y BT =M B *Y max_B .

[0066] In some other embodiments, the target brightness gain of RGB may also be set to a value between 0-2.

[0067] 3. Calculate the CMY target color coordinates.

[0068] Assuming the tristimulus values ​​are XYZ, the target XYZ values ​​of RGB can be calculated based on the target Yxy values ​​of RGB. Then, the target XYZ values ​​of CMY can be calculated based on the target XYZ values ​​of RGB. Finally, the target Yxy values ​​of CMY can be calculated based on the target XYZ values ​​of CMY. The formula for calculating the Yxy value based on the XYZ value is as follows: x = X / (X+Y+Z), y = Y / (X+Y+Z);

[0069] The formula for calculating the XYZ value based on the Yxy value is as follows: X = (x / y)Y, Z = ((1-xy) / y)Y;

[0070] The XYZ value is consistent with the Y value in the Yxy value.

[0071] The following relationship exists between the target XYZ values ​​of CMY and RGB: CT =X GT +X BT , Y CT =Y GT +Y BT , Z CT =Z GT +Z BT ; X MT =X RT+X BT , Y MT =Y RT +Y BT , Z MT =Z RT +Z BT ; X YT =X RT +X GT , Y YT =Y RT +Y GT , Z YT =Z RT +Z GT ;

[0072] Among them, X CT 、Y CT 、Z CT are the target XYZ values ​​of C; MT 、Y MT 、Z MT are the target XYZ values ​​of M; X YT 、Y YT 、Z YT are the target XYZ values ​​for Y; RT 、Y RT 、Z RT are the target XYZ values ​​of R; X GT 、Y GT 、Z GT are the target XYZ values ​​of G; X BT 、Y BT 、Z BT are the target XYZ values ​​of B respectively.

[0073] Alternatively, the target brightness gain of CMY may be equal to the ratio of the target brightness of each to the sum of the target brightness of its corresponding two primary colors, such as M C =Y CT / (Y GT +Y BT ), M M =Y MT / (Y RT +Y BT ), M Y =Y YT / (Y RT +Y GT ).

[0074] S1002 : Control the light modulation device according to original parameters and target parameters, where the original parameters include original color coordinates and original brightness ratio of RGBW corresponding to the original color gamut.

[0075] After obtaining the target parameters, the color gamut adjustment module 212 may send the original parameters and the target parameters to the control module 213 so that the control module 213 can control the light modulation device to achieve color gamut control and improve color accuracy.

[0076] Referring to FIG. 2( a ) or FIG. 2( b ), the display device may include a mode switching module 211 for determining a target display mode. The mode switching module 211 may select a corresponding display mode as needed, or may determine the target display mode based on a user's selection instruction. In different display modes, the timing of the light source light generated by the light source device 201 may also vary. For example, when the target display mode is mode 1, the output time of the first light is consistent with the output time of the second light, and the output time of the third light does not overlap with the output time of the first light. When the target display mode is mode 2, the output time of the first light is greater than, less than, or equal to the output time of the second light, and the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light, thereby meeting different display requirements. For example, assuming that the first light is a red laser, the second light is yellow or red fluorescence, and the third light is cyan light, the timing corresponding to mode 1 is shown in FIG. 6 , and the timing corresponding to mode 2 is shown in FIG. 7 or FIG. 8 . It should be understood that the timing corresponding to mode 2 is not limited to those shown in FIG. 7 and FIG. 8 , and switching between modes 1 and 2 only requires adjusting the lighting time of the corresponding light sources.

[0077] Furthermore, the third light may include a first sub-light and a second sub-light, wherein the first sub-light is a narrow-spectrum or broad-spectrum light, and the second sub-light is a narrow-spectrum or broad-spectrum light, and the first sub-light and the second sub-light have different colors. For example, the colors of the first light, the first sub-light, and the second sub-light are different, and the colors of the first light, the first sub-light, and the second sub-light are selected from red, green, and blue. When the target display mode is mode 1, the output time of the first sub-light and the output time of the second sub-light do not overlap; when the target display mode is mode 2, the output times of at least two of the first light, the first sub-light, and the second sub-light at least partially overlap. For example, assuming that the first light is a green laser, the second light is a green fluorescent light or a yellow fluorescent light, the first sub-light is a blue laser, and the second sub-light is a red laser, then the timing corresponding to mode 1 is shown in FIG9, and the timing corresponding to mode 2 is shown in FIG10 or FIG11. It should be understood that the timing corresponding to mode 2 is not limited to those shown in FIG10 and FIG11, and switching between modes 1 and 2 only requires adjusting the lighting time of the corresponding light sources.

[0078] Optionally, the light source light also includes a fourth light, which is a broad-spectrum light, and the fourth light has the same color as the first sub-light, or the spectrum of the fourth light at least includes the spectrum of the first sub-light; when the target display mode is mode one, the output time of the first sub-light is consistent with the output time of the fourth light; when the target display mode is mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light at least partially overlaps with the output time of the fourth light. For example, assuming that the first light is a red laser, the second light is yellow fluorescence or red fluorescence, the first sub-light is a green laser, the second sub-light is a blue laser, and the fourth light is green fluorescence, then the timing corresponding to mode one is shown in Figure 12, and the timing corresponding to mode two is shown in Figure 13 or Figure 14 or Figure 15. It should be understood that the timing corresponding to mode two is not limited to that shown in Figures 13-15, and switching between mode one and mode two only requires adjusting the lighting time of the corresponding light source.

[0079] Optionally, the light source also includes a fifth light, which is a narrow spectrum or a wide spectrum light, and the fifth light has the same color as the second sub-light; when the target display mode is mode one, the output time of the fifth light is within the output time of the second sub-light; when the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light and the fourth light. For example, assuming that the first light is a red laser, the second light is a red fluorescent light or a yellow fluorescent light, the first sub-light is a green laser, the second sub-light is a blue laser, the fourth light is a green fluorescent light or a yellow fluorescent light, and the fifth light is a blue laser, then the timing corresponding to mode one is shown in Figure 16, and the timing corresponding to mode two is shown in Figure 17 or Figure 18. It should be understood that the timing corresponding to mode two is not limited to that shown in Figures 17 and 18, and switching between modes one and two only requires adjusting the lighting time of the corresponding light source.

[0080] It should be understood that when the light source light includes the first light, the second light, the first sub-light, the second sub-light, the fourth light and the fifth light at the same time, assuming that the first light is red light, the first sub-light is green light, the second sub-light is blue light, and the fifth light is blue light, then the red light in the above step S1001 is only composed of the first light and / or the second light, the green light is only composed of the first sub-light and / or the fourth light, and the blue light is only composed of the second sub-light and / or the fifth light.

[0081] Optionally, when the target display mode is mode 2, when calculating the target color coordinates and target brightness gain of CMY in the above step S1001, the original color coordinates and original brightness of the corresponding mixed light may also be considered to further improve the accuracy of color gamut adjustment. For example, the target color coordinates of yellow light are obtained based on the target color coordinates and target brightness of red light and green light and the original color coordinates and original brightness of the first mixed light, where the first mixed light is the mixed light obtained when the light source generating red light and the light source generating green light are simultaneously lit, such as the overlapping part of the output time of the first light and the first sub-light shown in FIG17 ; for another example, the target color coordinates of cyan light are obtained based on the target color coordinates and target brightness of green light and blue light and the original color coordinates and original brightness of the second mixed light, where the second mixed light is the mixed light obtained when the light source generating green light and the light source generating blue light are simultaneously lit, such as the overlapping part of the output time of the first sub-light and the second sub-light shown in FIG17 .

[0082] In some embodiments, in order to avoid the light source being lit for a long time, which leads to heat accumulation, the lighting time of the light source can be divided into two segments in each lighting cycle. For example, the lighting cycle can be divided into a first sub-period and a second sub-period, and the lighting time of the corresponding light source in a lighting cycle is controlled to be distributed in the first sub-period and the second sub-period as needed, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous; and the lighting time of all light sources in two adjacent lighting cycles is discontinuous. Furthermore, the duration of each lighting of all light sources is greater than or equal to 9% of the duration of a lighting cycle to ensure the lighting time each time. The lighting cycle here can be the proportion of the lighting time of the light source in a frame. For example, for 4K, it is generally required to be 240HZ, corresponding to 4.167ms. Conventionally, RGB is lit once each, but in order to solve the problem of heat accumulation, it is split into lighting 2 times or more to improve the efficiency of the laser and extend the life of the laser.

[0083] It should be noted that the embodiment of the present invention does not limit the generation method of the first light, the second light, the first sub-light, the second sub-light, the fourth light and the fifth light.

[0084] For example, the light source device 201 includes a first light source, a second light source, an excitation light source, and a wavelength conversion device. The first light source is used to generate the first light, the second light source is used to generate the first sub-light, and the excitation light source is used to generate excitation light. The wavelength conversion device includes a conversion region and a light guiding region, wherein the conversion region and the light guiding region are sequentially located on the optical path of the excitation light. The conversion region includes a first sub-conversion region, wherein the first sub-conversion region is used to generate the second light under the irradiation of its incident light, and the light guiding region is used to guide the excitation light and generate the second sub-light. Furthermore, the conversion region of the wavelength conversion device may also include more sub-conversion regions, such as if the conversion region also includes a second sub-conversion region, wherein the first sub-conversion region and the second sub-conversion region of the conversion region are sequentially located on the optical path of the excitation light, and the second sub-conversion region is used to generate the fourth light under the irradiation of its incident light. Optionally, the light source device further includes a third light source for generating supplemental light. The supplemental light may be narrow-spectrum or broad-spectrum light, with a wavelength of 480 nm or less. The supplemental light may be used to illuminate the wavelength conversion device, or may be optically processed without the wavelength conversion device to form the output light of the light source device. For example, both the excitation light and the supplemental light may be blue lasers, with their dominant wavelengths selected from 455 nm and 465 nm. In this embodiment, multiplexing the excitation light, such as using a blue laser, can improve the utilization efficiency of the blue laser. Furthermore, using two blue lasers of different wavelengths can improve the speckle of the blue laser compared to a single wavelength. Mixing the fluorescence light can significantly improve the speckle while increasing brightness.

[0085] Figure 19 is a schematic diagram of the structure of a light source device provided in an embodiment of the present invention. As shown in Figure 19, the light source device includes a light source assembly, a first beam reduction system 03, a light guiding element 05, a first shaping lens group 07, a wavelength conversion device 09, a second shaping lens group 10, a light guiding element 12, a first light combining element 15, a third shaping lens group 16, a light homogenizing element 18, and a diffusion element 19.

[0086] The light source assembly includes a first light source 01, a second light source 02, and a light splitting and combining assembly. The light source assembly is used to emit red laser, green laser, and blue laser. The light combining method of the light source assembly is not limited. The first light source 01 is a laser light source, which can be a single light-emitting element or a light-emitting element array, and the light-emitting element array can include light-emitting elements of different colors. For example, the first light source 01 can include a monochromatic laser that generates blue light, green light, or red light, or the first light source 01 is a multi-color laser, that is, a light-emitting element array that includes multiple lasers. For example, the first light source 01 can include a blue laser and a red laser, or a blue laser and a green laser, or a blue laser, a red laser, and a green laser at the same time.

[0087] Continuing to refer to Figure 19, in the embodiment of the present invention, the first light source 01 is a light-emitting element array including RGB three-color lasers. The two beams of red laser generated by the first light source 01 are reflected by the first light-splitting and combining element DM1 and then emitted; part of the light in the green laser is reflected by the second light-splitting and combining element DM2 and then emitted by the first light-splitting and combining element DM1, and the other part of the light passes through the second light-splitting and combining element DM2 and then enters the third light-splitting and combining element DM3, and then is reflected by the third light-splitting and combining element DM3 and then emitted by the first light-splitting and combining element DM1; the blue laser generated by the first light source 01 is reflected by the fourth light-splitting and combining element DM4, and the light spot of the green laser can be expanded by DM2 and DM3, and then is emitted into the light-uniforming element, which can reduce the speckle phenomenon of the projection equipment.

[0088] The second light source 02 may be a laser light source, an LED light source, or a fluorescent light source, etc. Furthermore, the second light source 02 may be a single light-emitting element or an array of light-emitting elements, and the array of light-emitting elements may include light-emitting elements of different colors. For example, the second light source 02 may be an LD light source, an LED light source, or a UV light source that generates blue light, green light, or red light, etc., or the second light source 02 may be a multi-color laser, that is, an array of light-emitting elements that includes multiple lasers, such as the second light source 02 may include a blue laser and a red laser, or a blue laser and a green laser, or a blue laser, a red laser, and a green laser at the same time. In an embodiment of the present invention, the second light source 02 is a blue laser light source, and the blue laser generated by the second light source 02 and the blue laser generated by the first light source 01 are combined by the fourth light-splitting and combining element DM4 and then emitted. In some other embodiments, the light source assembly may not include the second light source 02, but only include the first light source 01. In this case, the fourth light-splitting and combining element DM4 may be a reflector.

[0089] In the embodiment of the present invention, after passing through the fourth light-splitting and light-combining element DM4, the optical paths of the blue laser light generated by the second light source 02 and the blue laser light generated by the first light source 01 can be exactly the same or different. Both can illuminate only a portion of the wavelength conversion device 09 or all of the wavelength conversion device 09. For example, if the wavelength conversion device 09 includes a conversion region and a light-guiding region, the blue laser light generated by the first light source 01 can be used to illuminate the conversion region and the light-guiding region of the wavelength conversion device 09, and the blue laser light generated by the second light source 02 can be used to illuminate the conversion region or the light-guiding region of the wavelength conversion device 09, and vice versa. If the conversion region of the wavelength conversion device 09 includes multiple sub-conversion regions, the blue laser light generated by the second light source 02 and / or the blue laser light generated by the first light source 01 can illuminate only a portion of the sub-conversion regions or all of the sub-conversion regions. In other embodiments, the blue laser light generated by the first light source 01 or the second light source 02 can also serve as the output light (i.e., light source light) of the light source device without passing through the wavelength conversion device 09.

[0090] The first beam reduction system 03 may include one or more lenses. For example, the first beam reduction system 03 includes two lenses, as shown in FIG19 . In some other embodiments, such as when the light spot of the second light source 02 is small, the lenses may be omitted.

[0091] The light guiding element 05 is used to transmit the blue laser light generated by the light source assembly to the wavelength conversion device 09, and reflect the fluorescence generated by the wavelength conversion device 09 and the blue laser light reflected by the wavelength conversion device 09. The light guiding element 05 can be an apertured beam splitter or an apertured reflector.

[0092] The first shaping lens group 07 is used to focus the laser onto the wavelength conversion device 09, shaping the output light of the wavelength conversion device 09 into quasi-collimated light. The first shaping lens group 07 may include one or more lenses. For example, the first shaping lens group 07 includes two lenses, as shown in Figure 19.

[0093] The wavelength conversion device 09 comprises a conversion region, a light-guiding region, and a diffusion region. The conversion region is configured to generate fluorescence under the illumination of incident blue laser light. The conversion region may include one or more sub-conversion regions, such as a first sub-conversion region and a second sub-conversion region. The light-guiding region is configured to guide the incident blue laser light, such as a reflective region or a transmissive region. Furthermore, the light-guiding region may diffuse the incident blue laser light, such as a reflective mirror or a transparent region equipped with a diffuser. The diffusion region is configured to transmit and diffuse the red and green laser light generated by the first light source 01. Alternatively, the wavelength conversion device 09 may comprise only the conversion region and the diffusion region. This means that the blue laser light generated by one of the first light source 01 and the second light source 02 is used to illuminate the wavelength conversion device to generate fluorescence (without reusing the blue laser light used as excitation light), while the blue laser light generated by the other light source serves as the blue light in the light source light emitted by the light source device. In one embodiment of the present invention, the conversion region, light-guiding region, and diffusion region form an integrated color wheel. In other embodiments, the conversion region, light-guiding region, and diffusion region may also be separate components.

[0094] The second shaping lens group 10 includes one or more lenses for further shaping the fluorescence and can be omitted.

[0095] The light guide element 12 is used to transmit the red laser and the green laser and reflect the blue laser. Optionally, the size of the light guide element 12 is greater than or equal to the size of the light guiding element 05, and the long side and short side of the light guide element 12 are respectively greater than or equal to the long axis and short axis of the light spot of the red laser and the green laser.

[0096] The first light-combining element 15 is used to reflect fluorescence (such as yellow light, or green light and red light) and transmit blue laser, red laser and green laser. In some embodiments, the first light-combining element 15 may be a reflector with an opening, and the laser is transmitted from the opening area, while the fluorescence is reflected from the remaining non-opening areas. In some other embodiments, the first light-combining element 15 may be a spectrometer with an opening, and the blue laser and green laser are transmitted from the opening area. Since the red laser generally has a larger divergence angle and a larger light spot, the spectrometer area may be coated with a spectrometer film that transmits the red laser and reflects the fluorescence. Generally, the main wavelength of the red laser is about 650nm, and the red fluorescence is a wide spectrum with a main wavelength of about 620nm. Therefore, the light can be combined in wavelength by coating. Optionally, the first light-combining element 15 may not have an opening, and directly transmit the blue laser, red laser and green laser and reflect the fluorescence by coating.

[0097] The third shaping lens group 16 is used to focus the light beam so that substantially all of the light beam is incident on the surface of the light homogenizing element 18. The third shaping lens group 16 may include one or more lenses. For example, the third shaping lens group 16 includes two lenses, as shown in FIG19 .

[0098] Continuing to refer to FIG19 , the light source light generated by the light source device includes red light, green light and blue light, wherein:

[0099] Red light source: The blue laser light generated by the first light source 01 and / or the second light source 02 excites the red phosphor on the wavelength conversion device 09 to produce red fluorescence with a spectral band of at least 600 to 650 nm. The red laser light generated by the first light source 01 is directly emitted through the light guide element 12 and the first light combining element 15.

[0100] Green light source: The blue laser light generated by the first light source 01 and / or the second light source 02 excites the green phosphor on the wavelength conversion device 09 to produce green fluorescence with a spectral band of at least 540 to 580 nm. The red laser light generated by the first light source 01 is directly emitted through the light guide element 12 and the first light combining element 15.

[0101] Blue light source: The blue laser generated by the first light source 01 and / or the second light source 02 is reflected by the light guiding area of ​​the wavelength conversion device 09 and then irradiated out through the light guiding element 05 , the first light combining element 15 and the light guiding element 12 .

[0102] When the display mode is mode one, the laser and fluorescence of the same color are completely synchronized, and the output time is completely consistent. The lighting time of each light source is shown in Figure 20. In the embodiment of the present invention, R LD represents the red laser in the first light source 01, G LD represents the green laser in the first light source 01, B1 LD represents the blue laser in the first light source 01, B2 LD represents the second light source 02, A1 represents the sub-period when B1 LD excites to produce red fluorescence, B1 represents the sub-period when B1 LD excites to produce green fluorescence, C1 represents the sub-period when B1 LD produces blue laser, A2 represents the sub-period when B2 LD excites to produce red fluorescence, B2 represents the sub-period when B2 LD excites to produce green fluorescence, and C2 represents the sub-period when B2 LD produces blue laser. In this way, better red, green and blue pure color brightness can be obtained, and the picture display brightness is high; when the display mode is mode two, through the laser light source with independently controllable driving time, two or more colors of laser light sources are simultaneously lit at certain moments on the basis of mode one, thereby greatly improving the white field brightness, wherein R LD and G LD are respectively LD can control the timing individually, and B1 LD is used to excite fluorescence and generate blue light. B2 LD is used as a supplementary blue laser. It can have exactly the same timing as B1 LD. B2 LD can also be controlled individually to excite only two or one type of light, or to generate only one type of light. In this case, different brightness can be adjusted to reduce power consumption. Different color gamuts and brightness can also be obtained by adjusting the current, as shown in Figures 21 to 24.

[0103] In the light source device shown in FIG19 , the red laser and green laser in the first light source 01 can be used to generate the first light and first sub-light described above. The blue laser in the first light source 01 and / or the second light source 02 can be used to generate excitation light. This excitation light irradiates the first conversion zone of the wavelength conversion device 09 to obtain the second light described above, irradiates the second sub-conversion zone of the wavelength conversion device 09 to obtain the fourth light described above, and irradiates the light-guiding zone (e.g., the reflective zone) of the wavelength conversion device 09 to obtain the second sub-light described above. The second light source 02 can be used to generate the fifth light described above. In other embodiments, the light-guiding zone can also be replaced with a conversion zone provided with cyan powder.

[0104] In some embodiments, the conversion area of ​​the wavelength conversion device 09 may only include a yellow fluorescent area or a green fluorescent area. When the display mode is mode one, the lighting time of each light source when the second light source 02 is not included is as shown in Figure 25, and the lighting time of each light source when the second light source 02 is included is as shown in Figure 26; when the display mode is mode two, the lighting time of each light source when the second light source 02 is not included is as shown in Figure 27 or Figure 28, and the lighting time of each light source when the second light source 02 is included is as shown in Figures 29-31.

[0105] Because wavelength conversion device 09 is a fixed partition, pure laser light is typically used to match the fluorescence. By adjusting the duration of the red and / or green lasers in first light source 01, and / or the second light source 02, different modes can be compatible within the same device. For example, switching from Mode 2 (Figure 21) to Mode 1 (Figure 20) simply requires shortening the R and G LD durations. Similarly, switching from Mode 1 (Figure 25) to Mode 2 (Figure 28) simply requires increasing the R LD duration.

[0106] In some embodiments, to avoid prolonged laser lighting and heat accumulation, the laser light source's lighting time can be divided into two segments within each lighting cycle. For example, the lighting cycle can be divided into a first sub-period and a second sub-period. During the first sub-period, R LD, G LD, and B1 LD are lit sequentially. Furthermore, the lighting time of R LD, G LD, and B1 LD can all be greater than or equal to 9% of the length of a lighting cycle. During the second sub-period, if the display mode is mode one, R LD, G LD, and B1 LD are still lit sequentially. If the display mode is mode two, two or three colors of LD are lit simultaneously during certain periods within the second sub-period to avoid heat accumulation and improve the efficiency and life of the laser. It should be understood that when the display mode is mode two, two or three colors of LD can also be lit simultaneously during certain periods within the two sub-periods. Among them, B2 LD can be lit during the lighting time of B1 LD, or B2 LD can be controlled separately as needed. Here, lighting up in sequence means that the sum of the lighting durations of the light sources is equal to the duration of the corresponding time period, and the lighting durations of the light sources do not overlap.

[0107] It should be noted that the corresponding transmission function in the above embodiments can be changed to reflection, and the reflection function can be changed to transmission, which does not affect the functional realization of the overall optical path and will not be described in detail in the embodiments of the present invention.

[0108] It should be understood that the term "module" in the embodiments of the present invention may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functions. Modules described as separate components may or may not be physically separate, and components displayed as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the purpose of the embodiments of the present invention. The module division is merely a logical functional division, and other division methods may be used in actual implementation. For example, a module or component may be divided into multiple modules or components, or multiple modules or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device, or module, and may be electrical, mechanical, or other forms.

[0109] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0110] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A display system, characterized in that: It includes a timing subsystem and a light modulation device, wherein the light modulation device is used to modulate the light source light into image light; The timing subsystem includes: A light source device, used for generating light source light, wherein the light source light comprises at least a first light, a second light and a third light, wherein the first light is light of a narrow spectrum, the second light is light of a wide spectrum, the third light comprises light of a narrow spectrum or a wide spectrum, the first light and the second light have the same color, or the spectrum of the second light at least comprises the spectrum of the first light; A mode switching module is used to determine a target display mode, wherein the target display mode includes mode one or mode two. When the mode switching module determines that the target display mode is mode one, the output time of the first light is consistent with the output time of the second light, and the output time of the third light does not overlap with the output time of the first light; when the mode switching module determines that the target display mode is mode two, the output time of the first light is greater than or less than or equal to the output time of the second light, and the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light.

2. A display system according to claim 1, characterized in that: The third light includes a first sub-light and a second sub-light, the first sub-light is a light of a narrow spectrum or a wide spectrum, the second sub-light is a light of a narrow spectrum or a wide spectrum, and the first sub-light and the second sub-light have different colors; When the mode switching module determines that the target display mode is mode 1, the output time of the first sub-light does not overlap with the output time of the second sub-light; When the mode switching module determines that the target display mode is mode 2, the output times of at least two of the first light, the first sub-light, and the second sub-light at least partially overlap.

3. A display system according to claim 2, characterized in that: The light source light further includes a fourth light, the fourth light is a broad-spectrum light, the fourth light has the same color as the first sub-light, or the spectrum of the fourth light at least includes the spectrum of the first sub-light; When the mode switching module determines that the target display mode is mode one, the output time of the first sub-light is consistent with the output time of the fourth light; when the mode switching module determines that the target display mode is mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light at least partially overlaps with the output time of the fourth light.

4. A display system according to claim 3, characterized in that: The light source light further includes a fifth light, the fifth light is a light of a narrow spectrum or a wide spectrum, and the fifth light has the same color as the second sub-light; When the mode switching module determines that the target display mode is mode 1, the output time of the fifth light is within the output time of the second sub-light; When the mode switching module determines that the target display mode is mode 2, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light, and the fourth light.

5. A display system according to claim 1, characterized in that: The lighting time of at least one of all the light sources of the light source device in one lighting cycle is distributed in a first sub-period and a second sub-period, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous, wherein each lighting cycle includes a first sub-period and a second sub-period; and the lighting time of all the light sources in two adjacent lighting cycles is discontinuous.

6. A display system according to claim 1, characterized in that: The duration of each lighting of all the light sources of the light source device is greater than or equal to 9% of the duration of a lighting cycle.

7. A display system according to claim 2, characterized in that: The light source device includes a first light source, a second light source, an excitation light source and a wavelength conversion device, the first light source is used to generate the first light, the second light source is used to generate the first sub-light, the excitation light source is used to generate excitation light, the wavelength conversion device includes a conversion area and a light guiding area, the conversion area and the light guiding area are sequentially located on the optical path of the excitation light, the conversion area includes a first sub-conversion area, the first sub-conversion area is used to generate the second light under the irradiation of incident light, and the light guiding area is used to guide the excitation light and generate the second sub-light.

8. A display system according to claim 7, characterized in that: The conversion zone further includes a second sub-conversion zone, the first sub-conversion zone and the second sub-conversion zone of the conversion zone are sequentially located on the optical path of the excitation light, the second sub-conversion zone is used to generate a fourth light under the irradiation of the incident light, the light source light includes the fourth light, the fourth light has the same color as the first sub-light, or the spectrum of the fourth light at least includes the spectrum of the first sub-light; When the mode switching module determines that the target display mode is mode one, the output time of the first sub-light is consistent with the output time of the fourth light; when the mode switching module determines that the target display mode is mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light at least partially overlaps with the output time of the fourth light.

9. A display system according to claim 7, characterized in that: The light source device further includes a third light source, the third light source is used to generate supplementary light, the supplementary light is narrow spectrum or wide spectrum light, and the wavelength of the supplementary light is less than or equal to 480nm; The third light source is lit within the lighting time of the excitation light source, and the supplementary light is used to illuminate at least one sub-conversion area of ​​the conversion area and / or the light guiding area; or, The supplementary light is processed to obtain a fifth light, the light source light includes the fifth light, and when the mode switching module determines that the target display mode is mode one, the output time of the fifth light is within the output time of the second sub-light; when the mode switching module determines that the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light and the fourth light.

10. A display system according to claim 4 or 9, characterized in that: The second sub-light and the fifth light are both narrow-spectrum lights, and the main wavelengths of the second sub-light and the fifth light are selected from 455 nm and 465 nm, respectively.

11. A display system according to claim 7, characterized in that: The first sub-light and the second sub-light are both narrow-spectrum lights, and the first light source, the second light source and the excitation light source are an integrally packaged device.

12. A display system according to claim 2, characterized in that: The colors of the first light, the first sub-light, and the second sub-light are different from each other, and the colors of the first light, the first sub-light, and the second sub-light are selected from red, green, and blue.

13. A display system according to claim 1, characterized in that: The color of the second light is yellow, green or red.

14. A display system according to claim 3, characterized in that: The color of the fourth light is green, red or yellow.

15. A display system according to claim 7, characterized in that: Each lighting cycle includes a first sub-period and a second sub-period. During the first sub-period, the sum of the lighting durations of the first light source, the second light source and the excitation light source is equal to the duration of the first sub-period, and the lighting times of the first light source, the second light source and the excitation light source do not overlap; during the second sub-period, the lighting times of at least two of the first light source, the second light source and the excitation light source partially overlap.

16. A display control method, applied to a display system, wherein the display system comprises a light source device for generating light from a light source, characterized in that: The method comprises: Controlling the light source device to generate light source light, the light source light at least includes a first light, a second light and a third light, the first light is a narrow spectrum light, the second light is a wide spectrum light, the third light includes a narrow spectrum light or a wide spectrum light, the first light and the second light have the same color, or the spectrum of the second light at least includes the spectrum of the first light; Timing control process, where The timing control process includes: Determine a target display mode, wherein the target display mode includes mode 1 or mode 2; When the target display mode is determined to be mode one, the output time of the first light is controlled to be consistent with the output time of the second light, and the output time of the third light does not overlap with the output time of the first light; when the target display mode is determined to be mode two, the output time of the first light is controlled to be greater than or less than or equal to the output time of the second light, and the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light.

17. A display control method according to claim 16, characterized in that: The third light includes a first sub-light and a second sub-light, the first sub-light is a light of a narrow spectrum or a wide spectrum, the second sub-light is a light of a narrow spectrum or a wide spectrum, and the first sub-light and the second sub-light have different colors; When the target display mode is determined to be mode 1, the output time of the first sub-light and the output time of the second sub-light are controlled. The time does not overlap; when the target display mode is determined to be mode 2, the output time of at least two of the first light, the first sub-light and the second sub-light is controlled to at least partially overlap.

18. A display control method according to claim 17, characterized in that: The light source light further includes a fourth light, the fourth light is a broad-spectrum light, the fourth light has the same color as the first sub-light, or the spectrum of the fourth light at least includes the spectrum of the first sub-light; When the target display mode is determined to be mode one, the output time of the first sub-light is controlled to be consistent with the output time of the fourth light; when the target display mode is determined to be mode two, the output time of the first sub-light is controlled to be greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light is at least partially overlapped with the output time of the fourth light.

19. A display control method according to claim 18, characterized in that: The light source light further includes a fifth light, the fifth light is a light of a narrow spectrum or a wide spectrum, and the fifth light has the same color as the second sub-light; When the target display mode is determined to be mode one, the output time of the fifth light is controlled to be within the output time of the second sub-light; when the target display mode is determined to be mode two, the output time of the fifth light is controlled to be within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light and the fourth light.

20. A display control method according to claim 16, characterized in that: The timing control process also includes: Controlling the lighting time of at least one of all the light sources of the light source device in a lighting cycle to be distributed in a first sub-period and a second sub-period, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous, wherein each lighting cycle includes the first sub-period and the second sub-period; The lighting time of all light sources in two adjacent lighting cycles is controlled to be discontinuous.

21. A display control method according to claim 16, characterized in that: The timing control process also includes: The duration of each lighting of all the light sources of the light source device is controlled to be greater than or equal to 9% of the duration of a lighting cycle.

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