A control method, an adjustment device and a projection device for projection display

Abstract

The present application discloses a control method, an adjustment device and a projection device for projection display. The method includes receiving continuous multi-frame image information, obtaining a dynamic color mode corresponding to the continuous multi-frame image information according to the continuous multi-frame image information; obtaining a driving current adjustment ratio and a brightness compensation ratio matching the dynamic color mode according to the dynamic color mode; increasing the driving current corresponding to the first color of the information to a first current range and decreasing the driving current corresponding to the second color to a second current range according to the driving current adjustment ratio; adjusting the gray-scale information corresponding to the first color and the second color in the continuous multi-frame image information according to the brightness compensation ratio. By the above method, the present application can improve the display brightness of the second color and enhance the display effect of the projection device.

Description

Technical Field

[0001] This application relates to the field of projection technology, and particularly to a control method, an adjustment device, and a projection device for projection display. Background Art

[0002] In the existing projection technology, to bring a better visual effect to users, the display is usually enhanced by increasing the color brightness; the color brightness is adjusted by a light valve, and usually the total light power irradiated on the light valve is increased to improve the brightness. However, the higher the total light power irradiated on the light valve, the higher the temperature rise of the light valve, and the high temperature will affect the performance of the light valve. Summary of the Invention

[0003] The main problem to be solved by this application is to provide a control method, an adjustment device, and a projection device for projection display, which can improve the display brightness of the first color and enhance the display effect of the projection device.

[0004] On the one hand, this application provides a control method for projection display, which includes: receiving continuous multi-frame image information, obtaining a dynamic color mode corresponding to the continuous multi-frame image information according to the continuous multi-frame image information; obtaining a driving current adjustment ratio and a brightness compensation ratio matching the dynamic color mode according to the dynamic color mode; increasing the driving current corresponding to the first color to a first current range according to the driving current adjustment ratio, and reducing the driving current corresponding to the second color to a second current range; adjusting the gray-scale information corresponding to the first color and the second color in the continuous multi-frame image information according to the brightness compensation ratio.

[0005] In one implementation, the multi-frame image information includes brightness data and color brightness control information, and the method further includes: analyzing the continuous multi-frame brightness data to obtain the proportion of the third color in the multi-frame brightness data; obtaining a dynamic color mode corresponding to the multi-frame brightness data according to the proportion of the third color.

[0006] In another implementation, the third color includes red, green, blue, or black, the first color is one or two of red, green, or blue, the second color is at least one of red, green, blue, or black. When the proportion of the first color is greater than the proportion of the second color, the dynamic color mode includes a red mode, a green mode, a blue mode, a red-green mode, a red-blue mode, or a blue-green mode; when the proportion of black is greater than the proportion of the second color, the dynamic color mode includes a black-red mode, a black-green mode, or a black-blue mode.

[0007] In another implementation, the method further includes: adjusting the color brightness control information according to a brightness compensation ratio to obtain adjusted color brightness control information; sending the adjusted color brightness control information to a light valve driving processor; wherein, the color brightness control information is used to control the brightness of the light beam output by the light valve driving processor.

[0008] In another implementation, the method further includes: looking up in a pre-stored mapping table according to a dynamic color mode to obtain a driving current adjustment ratio and a brightness compensation ratio that match the dynamic color mode, wherein the pre-stored mapping table includes at least one dynamic color mode and its corresponding driving current adjustment ratio and brightness compensation ratio.

[0009] On the other hand, this application provides an adjustment device, which includes a memory and a processor connected to each other. Among them, the memory is used to store a computer program, and when the computer program is executed by the processor, it is used to implement the above-mentioned control method for projection display.

[0010] On the other hand, this application provides a projection device, which includes a light valve driving processor and an adjustment device. The adjustment device is used to adjust the received image information and input the adjusted image information into the light valve driving processor, wherein the adjustment device is the above-mentioned adjustment device.

[0011] In one implementation, the projection device further includes a power supply driver and a light source array. The power supply driver is used to receive the driving current adjustment ratio output by the adjustment device and output power supply information to the light source array, wherein the power supply information is used to drive the light source array to generate a light beam, and the driving mode of the power supply driver includes an amplitude modulation mode or a frequency modulation mode.

[0012] In another implementation, when the driving mode is the amplitude modulation mode, the amplitude of the driving current corresponding to the first color increases to a first current range, and the amplitude of the driving current corresponding to the second color decreases to a second current range; when the driving mode is the frequency modulation mode, the duty cycle of the pulse width modulation information corresponding to the first color increases to a first duty cycle range, and the duty cycle of the pulse width modulation information corresponding to the second color decreases to a second duty cycle range.

[0013] In another implementation, the projection device further includes a light source driver, which is respectively connected to the power supply driver and the light source array, and is used to receive the power supply information and output information to drive the light source array to generate a light beam.

[0014] In another implementation, the projection device further includes a light valve driving processor, which is respectively connected to the adjustment device and the light source driver, and is configured to receive multi-frame image information output by the adjustment device and output synchronization control information to the light source driver, so that the light source driver drives the light source array to generate light beams of corresponding colors according to the power supply information and the synchronization control information.

[0015] In another implementation, the projection device further includes a light valve, which is configured to receive the light beams output by the light source array and the information output by the light valve driving processor, and emit projection light beams.

[0016] In another implementation, the power of each color of light in the light beam output by the light valve is the product of the driving current, the color wheel efficiency, the path efficiency, and the light output rate of the lens.

[0017] In the solution of the present application, before transmitting the image information to the light valve driving processor, the continuous multi-frame image information is analyzed and predicted first, and a dynamic color mode suitable for the next-stage display is selected. According to the dynamic color mode, the matching driving current adjustment ratio and brightness compensation ratio can be obtained. Then, according to the driving current adjustment ratio, the current of the first color is increased, while the current of the second color is decreased. Further, according to the brightness compensation ratio, the brightness value of the color is adjusted. The compensated image information is combined with the synchronized light, which can achieve the improvement of the peak brightness of the first color. Since the display brightness of the second color is reduced, the contrast of the to-be-displayed picture can be enhanced, and at the same time, the average light power projected onto the light valve is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0019] Figure 1 is a schematic flowchart of an embodiment of the control method for projection display provided by the present application;

[0020] Figure 2 is a schematic flowchart of another embodiment of the control method for projection display provided by the present application;

[0021] Figure 3 is a schematic structural diagram of an embodiment of the adjustment device provided by the present application;

[0022] Figure 4 is a schematic structural diagram of an embodiment of the projection device provided by the present application;

[0023] Figure 5 isFigure 4 Schematic diagram of drive current in the illustrated embodiment;

[0024] Figure 6 is Figure 4 Schematic diagram of PWM information in the illustrated embodiment;

[0025] Figure 7 is Figure 4 Schematic diagram of drive current and grayscale ratio in the illustrated embodiment. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0027] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of an embodiment of a control method for projection display provided by the present application. The method includes:

[0028] Step 11: Receive continuous multi-frame image information, and obtain a dynamic color mode corresponding to the continuous multi-frame image information according to the continuous multi-frame image information.

[0029] In most application scenarios, the picture presented by the projector is preset, that is, the projector pre-obtains the projection picture and then projects it. Therefore, the received continuous multi-frame image information can be analyzed to determine a dynamic color mode that matches the multi-frame image. This dynamic color mode can increase the brightness of at least one color in the current image while reducing the brightness of other colors. The dynamic color mode can be a preset mode or a mode obtained by other means, such as a mode obtained by the machine through deep learning.

[0030] Step 12: Obtain a drive current adjustment ratio and a brightness compensation ratio that match the dynamic color mode according to the dynamic color mode.

[0031] Since the three primary colors can form various colors, the drive current adjustment ratio can be the adjustment ratio of the drive current corresponding to each color in the three primary colors, that is, the drive current adjustment ratio includes the drive current adjustment ratio K R corresponding to red (R), the drive current adjustment ratio K G corresponding to green (G), and the drive current adjustment ratio K B corresponding to blue (B). For example, K R , K G , and K BIf they are -30%, -25%, and 32% respectively, it means that the driving current corresponding to red is reduced by 30%, the driving current corresponding to green is reduced by 25%, and the driving current corresponding to blue is increased by 32%.

[0032] The brightness compensation ratio can be the ratio of the light of each color in the three primary colors in the light output rate. That is, the brightness compensation ratio includes the brightness compensation ratio L corresponding to red R , the brightness compensation ratio L corresponding to green G and the brightness compensation ratio L corresponding to blue B , for example, L R , L G and L B If they are 30%, 25%, and -32% respectively, it means that in the light output rate, the proportion of red light is increased by 30%, the proportion of green light is increased by 25%, and the proportion of blue light is reduced by -32%.

[0033] There is a mapping relationship between the dynamic color mode, the driving current adjustment ratio, and the brightness compensation ratio. Through this mapping relationship, the driving current adjustment ratio and the brightness compensation ratio matching the current dynamic color mode can be quickly obtained.

[0034] For example, the mapping relationship between the dynamic color mode, the driving current adjustment ratio, and the brightness compensation ratio can be shown in the following table:

[0035]

[0036] Step 13: Increase the driving current corresponding to the first color of the information to the first current range according to the driving current adjustment ratio, and reduce the driving current corresponding to the second color to the second current range.

[0037] The second color can be a single color different from the first color, or multiple other colors different from the first color; the driving current adjustment ratio can be input into the power driver. After receiving the driving current adjustment ratio, the power driver adjusts the output current so that the driving current corresponding to the first color in the output power information increases, and the driving current corresponding to the second color decreases.

[0038] The first color corresponds to the dynamic color mode, that is, the prominent color in the dynamic color mode is the first color. For example, assume that the main content of image A1 is a red flower. Then, during the period of displaying image A1, the first color is red. By converting the dynamic color mode to the red mode, the currents corresponding to green light and blue light can be reduced by 30%, and the current corresponding to red light can be increased by 30%, so that the red flower becomes more colorful and the peak brightness of red light is higher. The main content of image A2 is green trees and a blue lake. Then, during the period of displaying image A2, the first colors are green and blue. By converting the dynamic color mode to the blue-green mode, the current corresponding to red light is reduced by 30%, and the currents corresponding to green light and blue light are increased by 20%, and the peak brightnesses of green light and blue light are higher. When displaying a blue sea and blue sky, the current ratio of blue light can be increased.

[0039] Step 14: Adjust the gray-scale information corresponding to the first color and the second color in the continuous multi-frame image information according to the brightness compensation ratio.

[0040] This brightness compensation ratio can adjust the image information, increase the gray-scale value of the color with the reduced current, and at the same time reduce the gray-scale value of the color with the increased current. For example, the power driver increases the current of red light by 30% and reduces the currents of green light and blue light by 20%. Corresponding to the driving current adjustment ratio, the gray-scale value is adjusted. For example, in the light output ratio of the light valve, the proportion of red light decreases by 30%, and the proportions of green light and blue light increase by 20%.

[0041] In the engineering machine solution, usually the picture scene is preset and the picture is predictable, such as artificially made animations, logos (LOGOs) or posters. When displaying a picture mainly of a certain color, by increasing the light emission ratio of the light source of this color and reducing the light emission ratio of the second color at the same time, the peak brightness of this color can be made higher and more colorful, and at the same time the overall average power of the light valve is reduced, which can reduce the heat dissipation cost of the light valve device, or a higher monochromatic peak brightness can be achieved under the same device. When playing a video, the dynamic color peak brightness with various colors switching automatically in turn can be presented, making the display viewing experience better.

[0042] This embodiment provides a drive control method for enhancing the dynamic color brightness of a projector, which is suitable for the engineering machine solution for on-site application. Before transmitting the image information to the light valve drive processor, analyze the continuous multi-frame image information, select a certain dynamic color mode suitable for the next stage of display, increase the peak current of the first color, reduce the current of the second color at the same time, and adjust the brightness value of the color. The compensated image information cooperates with the synchronized light, which can achieve enhancing the peak brightness of the first color, and at the same time the average light power projected onto the light valve is greatly reduced.

[0043] Please refer to Figure 2 ,Figure 2 It is a schematic flowchart of another embodiment of the control method for projection display provided by this application. The method includes:

[0044] Step 21: Receive continuous multiple frames of image information.

[0045] The multiple frames of image information include luminance data and color luminance control information. The color luminance control information can be used to control the luminance of the light beam output by the light valve driving processor. Specifically, the inversion ratio of the light valve driving processor can be controlled to achieve the purpose of controlling the luminance of the light beam output by the light valve. The color luminance control information can be RGB parallel information. The RGB parallel information can control the flipping ratio of the light valve, that is, the gray-scale value corresponding to RGB, and the maximum luminance value can be extracted from the luminance data.

[0046] Step 22: Analyze the continuous multiple frames of luminance data to obtain the proportion of the third color in the multiple frames of luminance data.

[0047] By analyzing and predicting the continuous multiple frames of RGB luminance data, the proportion of the third color in the multiple frames of luminance data can be obtained. The third color includes red, green, blue, or black, and the colors included in the third color are more than those included in the first color.

[0048] Step 23: Obtain the dynamic color mode corresponding to the multiple frames of luminance data according to the proportion of the third color.

[0049] According to the proportion of the third color, one of the dynamic color modes suitable for the next stage of display can be selected. The first color is one or two of red, green, or blue, and the second color is at least one of red, green, blue, or black. When the proportion of the first color is greater than the proportion of the second color, the dynamic color mode includes red mode, green mode, blue mode, red-green mode, red-blue mode, or blue-green mode. When the proportion of black is greater than the proportion of the second color, the dynamic color mode includes black-red mode, black-green mode, or black-blue mode.

[0050] In a specific embodiment, the proportion of various colors in the continuous multiple frames of images can be counted. If the proportion of black is much greater than the proportion of the second color, it is judged which color in the second color has the largest proportion except for black. If the proportion of red is the largest, the dynamic color mode is black-red mode. If the proportion of green is the largest, the dynamic color mode is black-green mode. If the proportion of blue is the largest, the dynamic color mode is black-blue mode.

[0051] If the proportion of red in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the red mode; if the proportion of green in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the green mode; if the proportion of blue in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the blue mode.

[0052] If the proportion of red and green in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the red-green mode; if the proportion of red and blue in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the red-blue mode; if the proportion of blue and green in consecutive multiple frames of images is much greater than the proportion of the second color, the dynamic color mode is the blue-green mode.

[0053] Step 24: Look up in the pre-stored mapping table according to the dynamic color mode to obtain the drive current adjustment ratio and brightness compensation ratio that match the dynamic color mode.

[0054] The pre-stored mapping table includes at least one dynamic color mode and the drive current adjustment ratio and brightness compensation ratio corresponding to the dynamic color mode, that is, the dynamic color preset mode, the drive current adjustment ratio, and the brightness compensation ratio are in one-to-one correspondence, and the drive current adjustment ratio and the brightness compensation ratio can be quickly obtained by looking up the table.

[0055] Step 25: Increase the drive current corresponding to the information and the first color to the first current range according to the drive current adjustment ratio, and decrease the drive current corresponding to the second color to the second current range.

[0056] Send the drive current adjustment ratio to the power driver. The power driver can select the drive mode according to the needs of the optical device. The drive mode includes the amplitude modulation mode and the frequency modulation mode. The power driver can drive the light source to output a light beam according to the selected drive mode and the synchronization enable information output by the digital light processing (DLP) device.

[0057] Step 26: Adjust the color brightness control information according to the brightness compensation ratio to obtain the adjusted color brightness control information.

[0058] Step 27: Send the adjusted color brightness control information to the light valve drive processor.

[0059] The color brightness control information after compensation processing can be sent to the light valve drive processor after encoding. The light valve drive processor can receive the encoded color brightness control information for light valve adjustment. The light valve can generate corresponding compensation and cooperate with the synchronized light to enhance the peak brightness of the first color. At the same time, the average light power projected onto the light valve is reduced, thereby reducing the heat dissipation cost. In other embodiments, the adjusted color brightness control information can also be encoded after being sent to the light valve drive processor.

[0060] In other embodiments, according to the needs of the actual picture, the total light power input to the light valve can be kept unchanged, but the light power of the first color to be highlighted in the picture is increased, and the light power of the second color is decreased. Then the peak brightness of the first color in the picture will be increased, thereby improving the contrast of the picture.

[0061] Please refer to Figure 3 , Figure 3 FIG. is a schematic structural diagram of an embodiment of an adjustment device provided by the present application. The adjustment device 30 includes a memory 31 and a processor 32 connected to each other. Among them, the memory 31 is used to store a computer program. When the computer program is executed by the processor 32, it is used to implement the control method of projection display in the above embodiment.

[0062] Please refer to Figure 4 , Figure 4 FIG. is a schematic structural diagram of an embodiment of a projection device provided by the present application. The projection device 40 includes an adjustment device 41 and a light valve drive processor 42. The adjustment device 41 is used to adjust the received image information and input the adjusted image information into the light valve drive processor 42. The adjustment device 41 is as shown in the above embodiment.

[0063] The RGB information input to the light valve drive processor 42 is first processed by the adjustment device 41 to complete the analysis and prediction of continuous multi-frame brightness data, and according to the analysis result, one of the dynamic color modes is selected.

[0064] Continue to refer to Figure 4 , the projection device 40 includes a power supply driver 43, a light source driver 44, a light source array 45, and a light valve 46.

[0065] The power supply driver 43 is used to receive the drive current adjustment ratio output by the adjustment device and output power supply information to the light source array 45. The power supply information is used to drive the light source array 45 to generate a light beam. The drive mode of the power supply driver 43 includes an amplitude modulation mode or a frequency modulation mode. The light source array 45 can include light emitting diodes (LEDs, Light Emitting Diodes) or laser diodes (LDs, Laser diodes).

[0066] The light source driver 44 is respectively connected to the power supply driver 43 and the light source array 45. It is used to receive power supply information and output information to drive the light source array 45 to generate light beams. The driving information generated by the light source driver 44 can be pulse width modulation (PWM) information.

[0067] When the driving mode is the amplitude modulation mode, the amplitude of the driving current corresponding to the first color increases to the first current range, and the amplitude of the driving current corresponding to the second color decreases to the second current range. For example, as Figure 5 shown, the frequencies of the driving information generated by the light source driver 44 are the same, but the voltage amplitudes corresponding to each color are different; when the driving mode is the frequency modulation mode, the duty cycle of the pulse width modulation information corresponding to the first color increases to the first duty cycle range, and the duty cycle of the pulse width modulation information corresponding to the second color decreases to the second duty cycle range; for example, as Figure 6 shown, the voltage amplitudes of the driving information generated by the light source driver 44 are the same, but the frequencies corresponding to each color are different.

[0068] The light valve driving processor 42 is respectively connected to the adjustment device 41 and the light source driver 44. It is used to receive multi-frame image information output by the adjustment device 41 and output synchronous control information to the light source driver 44, so that the light source driver 44 drives the light source array 45 to generate light beams of corresponding colors according to the power supply information and the synchronous control information; the light valve 46 is used to receive the light beams output by the light source array 45 and the information output by the light valve driving processor 42, and emit projection light beams.

[0069] In a certain frame of image, there is a ratio among the maximum required optical powers in the RGB monochromatic frames. According to the optical power saved by reducing the driving current of a certain color, combined with the proportion of each color wheel (not shown in the figure), it is converted into the optical power of the first color that can be increased, thereby increasing the peak brightness of the first color.

[0070] Furthermore, the power of each color of light in the light beam output by the light valve 46 is the product of the driving current, the color wheel efficiency, the path efficiency, and the light output ratio of the lens.

[0071] In a specific embodiment, the RGB optical power ratio in a certain frame of image is the ratio among the red optical power P_R in the light emitted by the lens, the green optical power P_G in the light emitted by the lens, and the blue optical power P_B in the light emitted by the lens. The calculation formulas for the red optical power P_R, the green optical power P_G, and the blue optical power P_B are as follows:

[0072] P_R = I_R * C_R * L_R * OnRate_R_DMD

[0073] P_G = I_G * C_G * L_G * OnRate_G_DMD

[0074] P_R = I_B * C_B * L_B * OnRate_B_DMD

[0075] Among them, I_R, C_R, L_R, and OnRate_R_DMD are the drive current, color wheel efficiency, path efficiency, and lens light output rate corresponding to red light respectively; I_G, C_G, L_G, and OnRate_G_DMD are the drive current, color wheel efficiency, path efficiency, and lens light output rate corresponding to green light respectively; I_B, C_B, L_B, and OnRate_B_DMD are the drive current, color wheel efficiency, path efficiency, and lens light output rate corresponding to blue light respectively.

[0076] In a specific embodiment, the dynamic color mode is the red mode. In the drive current adjustment ratio, the current of red light is increased, and the currents of green light and blue light are decreased. Specifically, the duty cycle of the PWM corresponding to red light can be increased, and the duty cycles of the PWM corresponding to green light and blue light can be decreased; in the corresponding compensation process, the gray level of red light in the light output by the light valve 46 remains unchanged, and the gray level ratios of green light and blue light are increased, and the total light power can be increased or maintained unchanged.

[0077] In a specific embodiment, the light valve 46 can be a digital micromirror device (DMD, Digital Micro-mirror Device). Figure 7 (a)-7(c) are the drive currents. Figure 7 (d)-7(e) are the gray level ratios corresponding to the brightest points in the DMD. Taking the case where the red light has the largest ratio as an example for illustration. Figure 7 (a) and 7(d) are the conventional methods. The blue light current for exciting the three-color color wheel remains unchanged, and the three-color gray levels are adjusted through the light valve 46.

[0078] Assume that at this time, the gray level ratios of green light and blue light are relatively small. The DMD can increase the gray level ratios of each pixel point corresponding to green light and blue light as a whole. For example, Figure 7 as shown in (e), the corresponding drive currents of green light and blue light are reduced accordingly, as Figure 7 shown in (b). The total light power irradiated on the light valve 46 will be reduced, and the light valve 46 still has room to increase the light power. At this time, the drive currents of red light, green light, and blue light can be increased synchronously according to a certain ratio, and the DMD makes corresponding compensation, as Figure 7 shown in (c). At this time, the peak brightness of red light will increase, as Figure 7 shown in (f).

[0079] The operations performed by the adjustment device 41 can be reflected by a dynamic color mode. When the user needs to increase the color brightness, selecting the increased dynamic color mode can achieve the brightness improvement of the input image. This is also applicable in the case of using pure laser or RGB laser to supplement fluorescence. The brightness ratio of each pure laser can be continuously and dynamically increased and decreased through amplitude modulation or frequency modulation. At the same time, the refresh rate of the liquid crystal display (LCD) can be synchronously compensated to achieve the same dynamic color mode. For a predictable video played in a loop, the driving current can be dynamically reduced by selecting the dynamic color mode to achieve the purpose of saving electricity costs.

[0080] In several implementation manners provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation manners described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0081] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this implementation manner.

[0082] In addition, in each implementation manner of this application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0083] The above are only the embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.

Claims

1. A control method for projection display, characterized in that Including: Receiving continuous multi-frame image information, and obtaining a dynamic color mode corresponding to the continuous multi-frame image information according to the continuous multi-frame image information; Obtaining a driving current adjustment ratio and a brightness compensation ratio matching the dynamic color mode; Increasing the driving current corresponding to the first color to a first current range and decreasing the driving current corresponding to the second color to a second current range according to the driving current adjustment ratio; Adjusting the gray levels corresponding to the first color and the second color in the continuous multi-frame image information according to the brightness compensation ratio; Wherein, the first color corresponds to the dynamic color mode, and the prominent color in the dynamic color mode is the first color; the second color is a single color different from the first color, or a plurality of other colors different from the first color.

2. The control method of projection display according to claim 1, wherein, The multi-frame image information includes brightness data and color brightness control information. The step of receiving continuous multi-frame image information and obtaining a dynamic color mode corresponding to the continuous multi-frame image information according to the continuous multi-frame image information includes: Analyzing the brightness data of continuous multi-frame images to obtain the proportion of a third color in the brightness data of the continuous multi-frame images; Obtaining the dynamic color mode corresponding to the brightness data of the continuous multi-frame images according to the proportion of the third color; The third color includes red, green, blue or black; the first color is one or two of red, green or blue.

3. The control method for projection display according to claim 2, wherein The second color is at least one of red, green, blue or black; when the proportion of the first color is greater than the proportion of the second color, the dynamic color mode includes a red mode, a green mode, a blue mode, a red-green mode, a red-blue mode or a blue-green mode; when the proportion of black of the third color is greater than the proportion of the second color, the dynamic color mode includes a black-red mode, a black-green mode or a black-blue mode.

4. The control method of projection display according to claim 2, characterized in that, The step of adjusting the gray levels corresponding to the first color and the second color in the continuous multi-frame image information according to the brightness compensation ratio includes: Adjusting the color brightness control information according to the brightness compensation ratio to obtain adjusted color brightness control information; Sending the adjusted color brightness control information to a light valve driving processor; Wherein, the color brightness control information is used to control the brightness of the light beam output by the light valve driving processor.

5. The control method of projection display according to claim 1, characterized in that, The step of obtaining a driving current adjustment ratio and a brightness compensation ratio matching the dynamic color mode according to the dynamic color mode includes: Searching in a pre-stored mapping table according to the dynamic color mode to obtain a driving current adjustment ratio and a brightness compensation ratio matching the dynamic color mode, wherein the pre-stored mapping table includes at least one of the dynamic color modes and the driving current adjustment ratio and the brightness compensation ratio corresponding to the dynamic color mode.

6. An adjustment device, characterized in that, Comprising a mutually connected memory and a processor, wherein the memory is used to store a computer program, and when the computer program is executed by the processor, it is used to implement the control method of projection display according to any one of claims 1-5.

7. A projection device, characterized in that, Comprising a light valve driving processor and an adjustment device, the adjustment device is used to adjust the received image information and input the adjusted image information to the light valve driving processor, wherein the adjustment device is the adjustment device according to claim 6.

8. The projection device according to claim 7, characterized in that The projection device further comprises a power supply driver and a light source array, the power supply driver is used to receive the driving current adjustment ratio output by the adjustment device and output power supply information to the light source array, wherein the power supply information is used to drive the light source array to generate a light beam, and the driving mode of the power supply driver includes an amplitude modulation mode or a frequency modulation mode.

9. The projection device according to claim 8, characterized in that When the driving mode is the amplitude modulation mode, the amplitude of the driving current corresponding to the first color increases to a first current range, and the amplitude of the driving current corresponding to the second color decreases to a second current range; when the driving mode is the frequency modulation mode, the duty cycle of the pulse width modulation information corresponding to the first color increases to a first duty cycle range, and the duty cycle of the pulse width modulation information corresponding to the second color decreases to a second duty cycle range.

10. The projection device according to claim 8, characterized in that The projection device further comprises a light source driver, the light source driver is respectively connected to the power supply driver and the light source array, and is used to receive the power supply information and output information to drive the light source array to generate a light beam.

11. The projection device according to claim 10, characterized in that The projection device further comprises a light valve driving processor, the light valve driving processor is respectively connected to the adjustment device and the light source driver, and is used to receive the multi-frame image information output by the adjustment device and output synchronous control information to the light source driver, so that the light source driver drives the light source array to generate light beams of corresponding colors according to the power supply information and the synchronous control information.

12. The projection device according to claim 11, characterized in that The projection device further comprises a light valve, the light valve is used to receive the light beam output by the light source array and the information output by the light valve driving processor, and emit a projection light beam.

13. The projection device according to claim 12, characterized in that The power of each color of light in the light beam output by the light valve is the product of the driving current, the color wheel efficiency, the path efficiency, and the light output ratio of the lens.

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