Display control method and display device

Abstract

The present invention discloses a display control method and a display device, wherein the display control method comprises: obtaining a video source signal, and obtaining the image information corresponding to each pixel unit in a frame of an image according to the video source signal; determining a pixel unit in each pixel group as a first pixel, and obtaining a target grayscale value of the first pixel; when the target grayscale value of the first pixel is greater than a first reference grayscale value, controlling the first pixel to display white light according to the target grayscale information, and controlling other pixel units to display corresponding images according to corresponding image information; the technical solution of the present invention aims to improve the grayscale display effect during video output.

Description

Technical Field

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

[0002] At present, with the development of the panel industry, the cost gap between 8K panels and 4K panels is gradually narrowing. However, since the pixel density of 8K panels is 4 times that of 4K panels and the panel transmittance is poor, under the same contrast conditions, the energy consumption of 8K products far exceeds that of 4K products (cannot meet European energy efficiency standards), which is very unfavorable for product development and promotion. Summary of the invention

[0003] The main purpose of the present invention is to provide a display control method and a display device, aiming to improve the grayscale display effect during video output.

[0004] To achieve the above object, the display control method proposed in the present invention is applied to a display panel, wherein the display panel includes a plurality of pixel groups, each of the pixel groups includes a plurality of pixel units, and the display control method includes:

[0005] Acquire a video source signal, and acquire image information corresponding to each pixel unit in a frame of image according to the video source signal;

[0006] Determine a pixel unit in each pixel group as a first pixel, and obtain a target grayscale value of the first pixel;

[0007] When the target grayscale value of the first pixel is greater than the first reference grayscale value, the first pixel is controlled to display white light according to the target grayscale information, and the other pixel units are controlled to display corresponding images according to the corresponding image information.

[0008] In some embodiments, the first pixels of the same pixel group are different when displaying adjacent frames of the image.

[0009] In some embodiments, acquiring target grayscale information of the first pixel includes:

[0010] Using the pixel unit adjacent to the first pixel as a second pixel, and acquiring image information of a plurality of the second pixels;

[0011] Calculate a target grayscale value corresponding to the first pixel according to the image information of the plurality of second pixels.

[0012] In some embodiments, before acquiring the target grayscale information of the plurality of second pixels, the method further includes:

[0013] Obtaining preset correction information corresponding to the second pixel;

[0014] The image information of the second pixel is corrected according to the preset correction information.

[0015] In some embodiments, after obtaining the target grayscale value of the first pixel, the method further includes:

[0016] When the target grayscale value of the first pixel is greater than the first reference grayscale value, comparing the target grayscale value of the first pixel with a second reference grayscale value;

[0017] When the target grayscale value of the first pixel is greater than a second reference grayscale value, determining a third pixel in the pixel group where the first pixel is located, wherein the second reference grayscale value is greater than the first reference grayscale value;

[0018] A target grayscale value of the third pixel is acquired, and the third pixel is controlled to display white light according to the target grayscale value.

[0019] In some embodiments, the third pixels of the same pixel group when displaying adjacent frames of the image are different.

[0020] The present invention further provides a display device, comprising:

[0021] Display panel;

[0022] A control module, the control module is connected to the display panel, and the control module is used to execute the above-mentioned display control method.

[0023] In some embodiments, the control module includes:

[0024] A controller, wherein an input end of the controller is used to receive a video source signal, and the controller is further used to obtain image information corresponding to each pixel unit in a frame of an image according to the video source signal; and

[0025] Determine a pixel unit in each pixel group as a first pixel, and obtain a target grayscale value of the first pixel;

[0026] a first processing chip and a second processing chip, wherein an input end of the first processing chip and an input end of the second processing chip are electrically connected to the controller respectively, and an output end of the first processing chip and an output end of the second processing chip are electrically connected to the display panel respectively;

[0027] The first processing chip and the second processing chip are used to control the first pixel to display white light according to the target grayscale information when the target grayscale value of the first pixel is greater than the first reference grayscale value, and control the other pixel units to display corresponding images according to the corresponding image information.

[0028] In some embodiments, a resolution of the first processing chip and a resolution of the second processing chip are both smaller than a resolution of the controller.

[0029] In some embodiments, when the input end of the first processing chip is connected to the first output end of the controller and the input end of the second processing chip is connected to the second output end of the controller, the controller is used to process the video source signal of the first resolution;

[0030] When the input end of the first processing chip and the input end of the second processing chip are respectively connected to the third output end of the controller, the controller is used to process the video source signal of the second resolution; wherein the first resolution is greater than the second resolution.

[0031] The technical solution of the present invention utilizes the characteristic that the human eye is much more sensitive to brightness (grayscale) than to color. When each frame of the image is output, a first pixel is determined from each pixel group of the display panel to display white light when the target grayscale value is greater than the first reference grayscale value. Since the white pixel has little effect on the original color performance, but the effect on the contrast performance is very obvious, the display brightness is effectively improved through white light display, the contrast is increased, the energy efficiency is reduced, and the grayscale display effect during video output is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 It is a flow chart of an embodiment of a display control method of the present invention;

[0034] Figure 2 This is a flow chart of an embodiment of step S200 in the present invention;

[0035] Figure 3 It is a flow chart of another embodiment of the display control method of the present invention;

[0036] Figure 4 A flow chart of another embodiment of the display control method of the present invention;

[0037] Figure 5 A display schematic diagram of an embodiment of a display control method of the present invention;

[0038] Figure 6 It is a structural schematic diagram of an embodiment of a display device of the present invention;

[0039] Figure 7 It is a structural schematic diagram of an embodiment of a display device of the present invention;

[0040] Figure 8 It is a structural schematic diagram of another embodiment of the display device of the present invention;

[0041] Fig. 9 It is a schematic structural diagram of another embodiment of the display device of the present invention.

[0042] Description of Figure Numbers:

[0043]

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The present invention provides a display control method, which is applied to a display panel.

[0048] Reference Figure 1 In one embodiment, the display panel includes a plurality of pixel groups, each of the pixel groups includes a plurality of pixel units, and the display control method includes:

[0049] S100, obtaining a video source signal, and obtaining image information corresponding to each pixel unit in a frame of an image according to the video source signal;

[0050] In this embodiment, the display panel is a partial module of a display device such as a monitor, a television, or a flat panel, and is electrically connected to a control module of the display device and controlled by the control module. The video source signal is the video data accessed by the control module. It can be understood that the playback of any video segment is achieved by outputting a continuous number of frames of image screens. Therefore, when the video source signal is accessed, the display panel will process it into a plurality of continuous image screens, and when playing each frame of the image screen, the image information corresponding to each pixel is obtained according to the data of the image screen, wherein the image information is the brightness information and the color information that the corresponding pixel unit should output.

[0051] S200, determining a pixel unit in each of the pixel groups as a first pixel, and obtaining a target grayscale value of the first pixel;

[0052] It should be noted that among the existing high-resolution display panels, since their pixel density is higher than that of low-resolution display panels, their panel transmittance is poor, resulting in lower contrast. For example, the pixel density of 8K display panels is 4 times that of 4K display panels. In order to achieve the same contrast ratio as that of 4K display panels, the energy consumption required for 8K products is much higher than that of 4K products (which cannot meet European energy efficiency standards).

[0053] Therefore, in order to avoid excessive energy consumption while improving the contrast of the display panel, in the present embodiment, multiple pixel units in the display panel are grouped, and 4, 8 or 16 pixel units are set as a pixel group according to the region. When outputting an image, one pixel unit in the pixel group is selected as the first pixel, and its target grayscale value is obtained.

[0054] It can be understood that the output of the first pixel is affected by its target grayscale value, and can emit light normally or as a white pixel to emit white light. Among them, the target grayscale value is the grayscale value that the first pixel should output as compensation white light in the corresponding image screen. Taking 256 levels as an example, the grayscale level that the first pixel should output as compensation white light in 256 levels is the target grayscale value. When the first pixel emits white light, due to the inherent characteristics of the human eye, the human eye is much more sensitive to brightness (grayscale) than to color. Therefore, the contrast of the area where the first pixel is located can be improved without having much impact on the original color performance, so that it has a better performance effect.

[0055] At the same time, in order to preset a determination order of the first pixel inside the control module of the display device, such as clockwise determination, counterclockwise determination or random determination, etc., the first pixel of the same pixel group is different when displaying the image pictures of adjacent frames, so that when outputting multiple consecutive image pictures, the position of the first pixel can be changed, avoiding the use of the same first pixel when outputting multiple consecutive image pictures, causing light spots on the display panel.

[0056] The position of the first pixel defined in the present invention may be, but is not limited to, changed frame by frame. Specifically, Figure 5 As shown, taking 4 positions transformation as a cycle of 4 frames as an example, when outputting multiple continuous image frames, 4 pixel units in a pixel group are determined as the first pixel one by one in every 4 frames, and after the end of 4 frames, the cycle is restarted.

[0057] S300 , when the target grayscale value of the first pixel is greater than the first reference grayscale value, controlling the first pixel to display white light according to the target grayscale information, and controlling the other pixel units to display corresponding images according to the corresponding image information.

[0058] It can be understood that the present application is to reduce the high-resolution display panel. Due to the poor transmittance of the panel, the contrast is low. Therefore, it is not necessary to set the first pixels of all pixel groups to output white light. In darker areas of the image, the first pixel can be displayed normally according to the connected image information.

[0059] Therefore, in this embodiment, the display panel is preset with a first reference grayscale value, which is the lowest critical value that the first pixel should output as the compensation white light. After the display panel determines the first pixel of each pixel group, it compares its target grayscale value with the first reference grayscale value. When the target grayscale value is less than the first reference grayscale value, it means that the image screen in the area where the first pixel is located is darker, and the compensation white light to be output is very weak. At this time, the first pixel can emit light according to its original image information and output the corresponding color and brightness; when the target grayscale value is greater than the first reference grayscale value, it means that the image screen in the area where the first pixel is located is brighter, and the compensation white light to be output is higher. At this time, the first pixel is a white pixel and outputs white light according to the target grayscale value. In this way, under the current image screen, the display brightness can be effectively improved, the contrast can be improved, and the energy efficiency can be reduced through white light display.

[0060] The technical solution of the present invention utilizes the characteristic that the human eye is much more sensitive to brightness (grayscale) than to color. When each frame of the image is output, a first pixel is determined from each pixel group of the display panel to display white light when the target grayscale value is greater than the first reference grayscale value. Since the white pixel has little effect on the original color performance, but the effect on the contrast performance is very obvious, the display brightness is effectively improved through white light display, the contrast is increased, the energy efficiency is reduced, and the grayscale display effect during video output is improved.

[0061] Reference Figure 2 In one embodiment, obtaining the target grayscale information of the first pixel includes:

[0062] S210, taking the pixel unit adjacent to the first pixel as a second pixel, and acquiring image information of a plurality of the second pixels;

[0063] S220: Calculate a target grayscale value corresponding to the first pixel according to the image information of the plurality of second pixels.

[0064] In this embodiment, the target grayscale value of the first pixel is related to the grayscale value of the second pixels around it. The number of the second pixels is set by the R&D personnel according to actual needs, and can be 4 around the first pixel or 8 surrounding the first pixel unit.

[0065] It is understandable that, since the first pixel needs to have a suitable grayscale value for white light output when outputting white light for brightness compensation, if the grayscale value of the white light is low, the brightness of the output image in this area will still be low. If the grayscale value of the white light is too high, the brightness difference between the pixel unit and the surrounding pixels will be too large, resulting in abruptness, which will result in poor compensation effect.

[0066] Therefore, after the control module of the display device determines the first pixel of each pixel group, it determines the second pixel adjacent to the first pixel according to the position of the first pixel, and obtains the image information of the second pixel. Since the image information contains information such as the color and brightness of the corresponding pixel unit, the target grayscale value of the corresponding first pixel can be calculated based on the image information of multiple second pixels.

[0067] Specifically, the target grayscale value of the first pixel may be obtained by calculating the average value of the grayscale values ​​of the corresponding second pixels, or by performing a median function calculation on the grayscale values ​​of the second pixels.

[0068] Reference Figure 3 In one embodiment, before acquiring the target grayscale information of the plurality of second pixels, the method further includes:

[0069] S410, obtaining preset correction information corresponding to the second pixel;

[0070] S420: Correct the image information of the second pixel according to the preset correction information.

[0071] It is understandable that when the display panel is produced, due to the problem of device consistency, some areas may have mura pixels. The mura pixel is a pixel unit with grayscale offset, and the pixel unit may have a low maximum brightness or a high minimum brightness. At this time, it is necessary to perform demura correction on this area through a preset correction table.

[0072] Therefore, in this embodiment, before calculating each target grayscale value through the image information of the second pixel, it is necessary to perform demura correction on the image information of the second pixel. Since the preset correction information is preset in the memory of the control module when the display panel is produced, when the display panel outputs an image screen, after determining the second pixel according to the first pixel, the image information of the second pixel is corrected according to the preset correction information corresponding to the second pixel, and the grayscale effect can be adjusted by setting the Gain value, but not limited to, and the adjustment value can be adjusted accordingly based on the characteristics of the screen, the environment, etc. After the correction is completed, the target grayscale value of the first pixel is calculated using the corrected image information of the second pixel.

[0073] Reference Figure 4 In one embodiment, after obtaining the target grayscale value of the first pixel, the method further includes:

[0074] S510, when the target grayscale value of the first pixel is greater than the first reference grayscale value, comparing the target grayscale value of the first pixel with a second reference grayscale value;

[0075] S520, when the target grayscale value of the first pixel is greater than a second reference grayscale value, determining a third pixel in the pixel group where the first pixel is located, wherein the second reference grayscale value is greater than the first reference grayscale value;

[0076] S530, obtaining a target grayscale value of the third pixel, and controlling the third pixel to display white light according to the target grayscale value.

[0077] In some cases, if the target grayscale value is too high, a situation may occur in a pixel group where only a first pixel cannot provide sufficient brightness compensation. Therefore, in this embodiment, when conditions permit, such as when displaying a 4K image in an 8K display panel, other pixel units may be additionally provided in addition to the first pixel to output white light for brightness compensation.

[0078] Specifically, a second reference grayscale value is preset in the control module, and when it is determined that the target grayscale value of the first pixel is greater than the first reference grayscale value, the target grayscale value of the first pixel is further compared with the second reference grayscale value to determine whether to determine a third pixel in the pixel group. When the target grayscale value is greater than the second reference grayscale value, it means that in a pixel group, only one first pixel cannot provide sufficient brightness compensation. At this time, a third pixel is determined from the pixel group where the first pixel is located, and the target grayscale value of the third pixel is calculated based on the image information of the surrounding pixel units of the third pixel, and the third pixel is controlled to perform brightness compensation simultaneously with the first pixel.

[0079] Likewise, the third pixels of the same pixel group are different when displaying the image frames of adjacent frames.

[0080] Furthermore, the second reference grayscale value may include multiple different grayscale values, and each grayscale value corresponds to a specific number of third pixels. For example, in 256 color scales, in different levels of grayscale values ​​such as 100, 150, and 200, when the target grayscale value is greater than 100, a pixel group includes a first pixel, when the target grayscale value is greater than 150, a pixel group includes a first pixel and a third pixel, and when the target grayscale value is greater than 200, a pixel group includes a first pixel and two third pixels.

[0081] Reference Figure 6 and Figure 7 The present invention further provides a display device, the display device comprising:

[0082] Display panel 700;

[0083] The control module 600 is connected to the display panel 700 and is used to execute the above-mentioned display control method.

[0084] In this embodiment, the control module 600 may include a controller 610, a single chip microcomputer or a control chip. In order to determine the first pixel and calculate and judge its target grayscale value, a compensation control module is provided inside the control module 600 to convert one or more pixel units in a pixel group into the first pixel for display control to improve display contrast.

[0085] Specifically, Figure 7 As shown, the control module 600 can be a highly integrated control chip. When used to display a video source signal with an 8K resolution, the control chip can adopt an 8K 60 Hz SOC.

[0086] Reference Figures 6 to 9 In one embodiment, the control module 600 includes:

[0087] A controller 610, wherein the input end of the controller 610 is used to receive a video source signal, and the controller 610 is further used to obtain image information corresponding to each pixel unit in a frame of an image according to the video source signal; and

[0088] Determine a pixel unit in each pixel group as a first pixel, and obtain a target grayscale value of the first pixel;

[0089] a first processing chip 620 and a second processing chip 630, wherein an input end of the first processing chip 620 and an input end of the second processing chip 630 are electrically connected to the controller 610, respectively, and an output end of the first processing chip 620 and an output end of the second processing chip 630 are electrically connected to the display panel 700, respectively;

[0090] The first processing chip 620 and the second processing chip 630 are used to control the first pixel to display white light according to the target grayscale information when the target grayscale value of the first pixel is greater than the first reference grayscale value, and control the other pixel units to display corresponding images according to the corresponding image information.

[0091] In this embodiment, a working architecture combining a controller 610 and two processing chips is adopted, wherein the controller 610 is used to perform unified analysis and conversion processing on the connected video source signal to obtain image information corresponding to each frame of the image, and the first processing chip 620 and the second processing chip 630 are used to individually control each pixel unit of the display panel 700. Therefore, the resolution of the first processing chip 620 and the resolution of the second processing chip 630 are both smaller than the resolution of the controller 610.

[0092] It should be noted that in order to synchronize the data information output by the first processing chip 620 with the data information output by the second processing chip 630, synchronization instructions need to be transmitted between the two chips, such as Figure 8 , Fig. 9 As shown, the first processing chip 620 and the second processing chip 630 use the SYNC protocol to ensure the consistency of synchronization data.

[0093] The design scheme of cascading two processing chips can be, but is not limited to, setting grayscale conversion for one of the processing chips, and arranging the transmission data lines to divide the pixel units in each pixel group of the display panel 700 into different processing chips for control. For example, taking a pixel group including 4 pixel units as an example, in a pixel group, any 2 pixel units can be controlled by different processing chips, so that the grayscale conversion of one of the processing chips can realize the overall data conversion display.

[0094] Reference Figures 6 to 9 In one embodiment, when the input end of the first processing chip 620 is connected to the first output end of the controller 610, and the input end of the second processing chip 630 is connected to the second output end of the controller 610, the controller 610 is used to process the video source signal of the first resolution;

[0095] When the input end of the first processing chip 620 and the input end of the second processing chip 630 are respectively connected to the third output end of the controller 610, the controller 610 is used to process the video source signal of the second resolution; wherein the first resolution is greater than the second resolution.

[0096] In this embodiment, although the display panel 700 used in this application is generally a high-resolution display panel, it can also be backward compatible with video source signals of other resolutions. For example, an 8K display panel 700 can play 4K video.

[0097] Therefore, for video source signals with different resolutions, the present invention also proposes two different control module 600 architectures.

[0098] When it is necessary to access a video source signal of a first resolution, the first processing chip 620 and the second processing chip 630 can be respectively connected to different output terminals of the controller 610, so that each processing chip processes data of different parts of the video source signal, and controls the display panel 700 to display 8K data normally. When it is necessary to access a video source signal of a second resolution, the first processing chip 620 and the second processing chip 630 are respectively connected to the same output terminal of the controller 610. At this time, each processing chip processes the same data in the video source signal, thereby controlling the display panel 700 to expand the video source signal of the second resolution to the first resolution for display on the panel.

[0099] Specifically, taking the first resolution of 8K and the second resolution of 4K as an example, the control module 600 may be a combination architecture of a control chip and two processing chips, such as Figure 8As shown, when used to display a video source signal with 8K resolution, the control chip can use an 8K 60Hz SOC. Fig. 9 As shown, when used to display a video source signal with a 4K resolution, the control chip can use a 4K120Hz SOC to expand 4K to 8K output.

[0100] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A display control method, applied to a display panel, characterized in that: The display panel includes a plurality of pixel groups, each of the pixel groups includes a plurality of pixel units, and the display control method includes: Acquire a video source signal, and acquire image information corresponding to each pixel unit in a frame of image according to the video source signal; Determine a pixel unit in each pixel group as a first pixel, and obtain a target grayscale value of the first pixel; When the target grayscale value of the first pixel is greater than the first reference grayscale value, controlling the first pixel to display white light according to the target grayscale information, and controlling the other pixel units to display corresponding images according to the corresponding image information; Wherein, acquiring the target grayscale information of the first pixel includes: Using the pixel unit adjacent to the first pixel as a second pixel, and acquiring image information of a plurality of the second pixels; Calculate a target grayscale value corresponding to the first pixel according to the image information of the plurality of second pixels.

2. The display control method according to claim 1, characterized in that: The first pixels of the same pixel group are different when displaying the image pictures of adjacent frames.

3. The display control method according to claim 1, characterized in that: Before acquiring the target grayscale information of the plurality of second pixels, the method further includes: Obtaining preset correction information corresponding to the second pixel; The image information of the second pixel is corrected according to the preset correction information.

4. The display control method according to claim 1, wherein: After obtaining the target grayscale value of the first pixel, the method further includes: When the target grayscale value of the first pixel is greater than the first reference grayscale value, comparing the target grayscale value of the first pixel with a second reference grayscale value; When the target grayscale value of the first pixel is greater than a second reference grayscale value, determining a third pixel in the pixel group where the first pixel is located, wherein the second reference grayscale value is greater than the first reference grayscale value; A target grayscale value of the third pixel is acquired, and the third pixel is controlled to display white light according to the target grayscale value.

5. The display control method according to claim 4, characterized in that: The third pixels of the same pixel group when displaying the image pictures of adjacent frames are different.

6. A display device, characterized in that: The display device comprises: Display panel; A control module, wherein the control module is connected to the display panel, and the control module is used to execute the display control method according to any one of claims 1 to 5.

7. The display device according to claim 6, characterized in that The control module comprises: A controller, wherein an input end of the controller is used to receive a video source signal, and the controller is further used to obtain image information corresponding to each pixel unit in a frame of an image according to the video source signal; and Determine a pixel unit in each pixel group as a first pixel, and obtain a target grayscale value of the first pixel; a first processing chip and a second processing chip, wherein an input end of the first processing chip and an input end of the second processing chip are electrically connected to the controller respectively, and an output end of the first processing chip and an output end of the second processing chip are electrically connected to the display panel respectively; The first processing chip and the second processing chip are used to control the first pixel to display white light according to the target grayscale information when the target grayscale value of the first pixel is greater than the first reference grayscale value, and control the other pixel units to display corresponding images according to the corresponding image information.

8. The display device according to claim 7, characterized in that The resolution of the first processing chip and the resolution of the second processing chip are both smaller than the resolution of the controller.

9. The display device according to claim 7, characterized in that When the input end of the first processing chip is connected to the first output end of the controller, and the input end of the second processing chip is connected to the second output end of the controller, the controller is used to process the video source signal of the first resolution; When the input end of the first processing chip and the input end of the second processing chip are respectively connected to the third output end of the controller, the controller is used to process the video source signal of the second resolution; wherein the first resolution is greater than the second resolution.

Images