WO2024001502A1 - Screen display method, screen display apparatus, electronic device, program and medium - Google Patents

Abstract

A screen display method, a screen display apparatus, an electronic device, a program and a medium. The screen display method comprises: acquiring an initial pixel brightness corresponding to each pixel point in an image to be displayed (101); taking the lowest actual brightness of a screen when a pure-color image is displayed according to the initial pixel brightness corresponding to a single pixel point as a target pixel brightness corresponding to the single pixel point, so as to acquire a target pixel brightness corresponding to each pixel point (102); and displaying, on the screen and according to the corresponding target pixel brightness, each pixel point in the image to be displayed (103).

Description

Screen display method, screen display device, electronic equipment, program and media

Cross-references to related applications

This disclosure claims the priority of a Chinese patent application filed with the China Patent Office on June 29, 2022, with application number 202210778200.4 and titled "Screen display method, screen display device, electronic equipment, program and medium", and its entire content is approved by This reference is incorporated into this disclosure.

Technical field

The present disclosure belongs to the field of display technology, and particularly relates to a screen display method, a screen display device, electronic equipment, a program and a medium.

Background technique

In related technology, a direct-type Mini LED screen can be seen in Figure 1, which includes a backlight layer composed of multiple light panels, and an LCD image display layer disposed on the backlight layer. The backlight layer provides the image display layer with The light source, and the image display layer controls the light transmittance of the image display layer by adjusting the power supply voltage of the liquid crystal, so that different images can be displayed on the image display layer. Since the light panels are affected by problems such as cumulative errors or positioning accuracy during the splicing process, the actual LED spacing at the joints of different light panels will deviate from the design value, especially the Mini LED light panels with high-density lamp beads will cause this deviation. It is more sensitive, causing the backlight brightness at the seams of the light panel to be lower than the backlight brightness at the non-seam areas, causing dark stripes to appear on the display image at the seams of the screen light panel.

Obviously, this deviation will cause serious interference to the uniformity of light emitted by the backlight layer of the Mini LED screen.

Contents of the invention

The present disclosure provides a screen display method, screen display device, electronic equipment, program and medium.

Some embodiments of the present disclosure provide a screen display method, the method includes:

Obtain the initial pixel brightness corresponding to each pixel in the image to be displayed;

The lowest actual brightness when the screen displays a pure color image according to the initial pixel brightness corresponding to a single pixel is used as the target pixel brightness corresponding to the single pixel to obtain each of the images. The target pixel brightness corresponding to the prime point;

Each pixel point in the image to be displayed is displayed on the screen according to the corresponding target pixel brightness.

Optionally, the lowest actual brightness when the screen displays a pure color image according to the initial pixel brightness corresponding to a single pixel point is used as the target pixel brightness corresponding to the single pixel point, including:

Query the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table. The brightness adjustment value is used to represent the initial pixel brightness display of the screen corresponding to the pixel. The numerical relationship between the lowest actual brightness of a pure color image and the initial pixel brightness;

The brightness adjustment value is used to reduce the initial pixel brightness to a target pixel brightness.

Optionally, the initial pixel brightness includes: the initial sub-pixel brightness of each sub-pixel included in the pixel point, and the target pixel brightness includes: the target of each sub-pixel included in the pixel point. Sub-pixel brightness, the brightness adjustment value includes: the sub-pixel brightness adjustment value of each sub-pixel point included in the pixel point;

Querying the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table includes:

Query in the brightness correction lookup table to find the brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs, as the sub-pixel brightness adjustment of the sub-pixel point. value;

Using the brightness adjustment value to reduce the initial pixel brightness to a target pixel brightness includes:

The initial sub-pixel brightness is reduced to a target sub-pixel brightness using the sub-pixel brightness adjustment value.

Optionally, the brightness correction lookup table is queried to obtain a brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel and the pixel position of the pixel to which the sub-pixel belongs, as the sub-pixel. Subpixel brightness adjustment values for points, including:

Query in the brightness correction lookup table a plurality of adjacent points adjacent to the initial sub-pixel brightness and the point corresponding to the pixel position;

The sub-pixel brightness adjustment value corresponding to the sub-pixel point is calculated according to the adjacent brightness adjustment value corresponding to the adjacent point.

Optionally, the brightness correction lookup table is obtained through the following steps:

Obtain actual brightness distribution data when the screen displays multiple solid-color grayscale images with different brightness levels;

Determine the lowest actual brightness in the actual brightness distribution data for each brightness level;

Calculate the brightness adjustment value between the actual brightness of each pixel point in the actual brightness distribution data and the lowest actual brightness;

A mapping relationship between the brightness adjustment value, the actual brightness and the pixel position of the pixel is established to obtain the brightness correction lookup table.

Optionally, calculating the brightness adjustment value between the actual brightness of each pixel point in the actual brightness distribution data and the lowest actual brightness includes:

The ratio between the lowest actual brightness and the actual brightness of each pixel in the actual brightness distribution data is used as the brightness adjustment value corresponding to each pixel.

Optionally, obtaining actual brightness distribution data when the screen displays multiple solid-color grayscale images with different brightness levels respectively includes:

Obtain the actual brightness distribution image of the screen when each of the solid-color grayscale images is displayed respectively;

Actual brightness distribution data is obtained by densely sampling low brightness areas in the actual brightness distribution image and sparsely sampling normal brightness areas in the actual brightness distribution image.

Optionally, the dense sampling of low brightness areas in the actual brightness distribution image and the sparse sampling of normal brightness areas in the actual brightness distribution image to obtain actual brightness distribution data include:

When the screen is a Mini LED screen, dense sampling is performed on the seams of the backlight panel in the actual brightness distribution image, and sparse sampling is performed on the seams of the non-backlight panel in the actual brightness distribution image to obtain the actual brightness distribution. data.

Optionally, obtaining the initial pixel brightness of each pixel in the image to be displayed includes:

Obtain the initial grayscale data of the image to be displayed;

Perform electro-optical conversion on the initial grayscale data to obtain the initial pixel brightness of each pixel;

Displaying each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness includes:

Perform photoelectric conversion on the target pixel brightness of each pixel point to obtain the target grayscale data of the image to be displayed;

The target grayscale data is output to the screen, so that the screen displays the image to be displayed.

Some embodiments of the present disclosure provide a screen display device, including:

An input module configured to obtain the initial pixel brightness corresponding to each pixel in the image to be displayed;

The processing module is configured to use the lowest actual brightness when the screen displays a solid color image according to the initial pixel brightness corresponding to a single pixel point as the target pixel brightness corresponding to the single pixel point, so as to obtain the corresponding brightness of each pixel point. The target pixel brightness;

A display module is configured to display each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness.

Optionally, the processing module is also configured to:

Query the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table. The brightness adjustment value is used to represent the initial pixel brightness display of the screen corresponding to the pixel. The numerical relationship between the lowest actual brightness of a pure color image and the initial pixel brightness;

The brightness adjustment value is used to reduce the initial pixel brightness to a target pixel brightness.

Optionally, the initial pixel brightness includes: the initial sub-pixel brightness of each sub-pixel included in the pixel point, and the target pixel brightness includes: the target of each sub-pixel included in the pixel point. Sub-pixel brightness, the brightness adjustment value includes: the sub-pixel brightness adjustment value of each sub-pixel point included in the pixel point;

The processing module is also configured to:

Query in the brightness correction lookup table to find the brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs, as the sub-pixel brightness adjustment of the sub-pixel point. value;

Using the brightness adjustment value to reduce the initial pixel brightness to a target pixel brightness includes:

The initial sub-pixel brightness is reduced to a target sub-pixel brightness using the sub-pixel brightness adjustment value.

Optionally, the processing module is also configured to:

Query in the brightness correction lookup table a plurality of adjacent points adjacent to the initial sub-pixel brightness and the point corresponding to the pixel position;

The sub-pixel brightness adjustment value corresponding to the sub-pixel point is calculated according to the adjacent brightness adjustment value corresponding to the adjacent point.

Optionally, the device further includes: a lookup table building module configured to:

Obtain actual brightness distribution data when the screen displays multiple solid-color grayscale images with different brightness levels;

Determine the lowest actual brightness in the actual brightness distribution data for each brightness level;

Calculate the brightness adjustment value between the actual brightness of each pixel point in the actual brightness distribution data and the lowest actual brightness;

A mapping relationship between the brightness adjustment value, the actual brightness and the pixel position of the pixel is established to obtain the brightness correction lookup table.

Optionally, the query table building module is also configured as:

The ratio between the lowest actual brightness and the actual brightness of each pixel in the actual brightness distribution data is used as the brightness adjustment value corresponding to each pixel.

Optionally, the query table building module is also configured as:

Obtain the actual brightness distribution image of the screen when each of the solid-color grayscale images is displayed respectively;

Actual brightness distribution data is obtained by densely sampling low brightness areas in the actual brightness distribution image and sparsely sampling normal brightness areas in the actual brightness distribution image.

Optionally, the query table building module is also configured as:

When the screen is a Mini LED screen, dense sampling is performed on the seams of the backlight panel in the actual brightness distribution image, and sparse sampling is performed on the seams of the non-backlight panel in the actual brightness distribution image to obtain the actual brightness distribution. data.

Optionally, also configured to:

Obtain the initial grayscale data of the image to be displayed;

Perform electro-optical conversion on the initial grayscale data to obtain the initial pixel brightness of each pixel;

The display module is also configured to:

Perform photoelectric conversion on the target pixel brightness of each pixel point to obtain the target grayscale data of the image to be displayed;

The target grayscale data is output to the screen, so that the screen displays the image to be displayed.

Some embodiments of the present disclosure provide a display device, including: a display screen and a screen controller;

The screen controller is configured to output the target pixel brightness of the image to be displayed to the display screen by executing the above-mentioned screen display method;

The display screen is configured to display the image to be displayed based on the target pixel brightness.

Some embodiments of the present disclosure provide a computing processing device, including:

A memory having computer readable code stored therein;

One or more processors, when the computer readable code is executed by the one or more processors, the computing processing device performs the above-mentioned screen display method.

Some embodiments of the present disclosure provide a computer program, including computer readable code, which when run on a computing processing device, causes the computing processing device to perform the screen display method as described above.

Some embodiments of the present disclosure provide a non-transitory computer-readable medium in which the screen display method as described above is stored.

The present disclosure provides a screen display method, screen display device, electronic equipment, program and medium, by adjusting the initial pixel brightness of each pixel point in the image to be displayed to the initial pixel brightness of the screen display before the screen displays the image. The lowest actual brightness of a pure color grayscale image, so that the brightness level of pixels in the normal brightness area of the screen can be reduced to be consistent with the brightness level of the lower brightness area, even if the local brightness of the backlight layer of the screen is low, it can be guaranteed The brightness uniformity of the image displayed on the screen.

The above description is only an overview of the technical solutions of the present disclosure. In order to have a clearer understanding of the technical means of the present disclosure, they can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present disclosure more obvious and understandable. , the specific implementation modes of the present disclosure are specifically listed below.

Brief description of the drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, a brief introduction will be made below to the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 schematically shows the structural diagram of a Mini LED screen provided by some embodiments of the present disclosure;

Figure 2 schematically shows a flow chart of a screen display method provided by some embodiments of the present disclosure;

Figure 3 schematically shows one of the flowcharts of another screen display method provided by some embodiments of the present disclosure;

Figure 4 schematically shows the second schematic flowchart of another screen display method provided by some embodiments of the present disclosure;

Figure 5 schematically shows the third flowchart of another screen display method provided by some embodiments of the present disclosure;

Figure 6 schematically shows the fourth schematic flowchart of another screen display method provided by some embodiments of the present disclosure;

Figure 7 schematically shows a system architecture diagram of a screen display method provided by some embodiments of the present disclosure;

Figure 8 schematically shows one of the flowcharts of a lookup table construction method provided by some embodiments of the present disclosure;

Figure 9 schematically shows the second flow diagram of a lookup table construction method provided by some embodiments of the present disclosure;

Figure 10 schematically shows the effect of an image sampling method provided by some embodiments of the present disclosure;

Figure 11 schematically shows a structural diagram of a screen display device provided by some embodiments of the present disclosure;

Figure 12 schematically illustrates a block diagram of a computing processing device for performing methods according to some embodiments of the present disclosure;

Figure 13 schematically illustrates a storage unit for holding or carrying program code implementing methods according to some embodiments of the present disclosure.

A detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this disclosure.

Figure 2 schematically shows a flowchart of a screen display method provided by the present disclosure. The method includes:

Step 101: Obtain the initial pixel brightness corresponding to each pixel in the image to be displayed.

It should be noted that the execution subject of this disclosure is the screen controller, and the screen controller and the screen For communication connection, of course the screen controller can be integrated into the screen or set up separately from the screen. The details can be set according to actual needs and are not limited here. The image to be displayed is the image data that the screen controller receives and needs to be output to the screen, which contains the initial pixel brightness that needs to be displayed for each pixel of the screen.

In the embodiment of the present disclosure, the screen controller obtains the image data of the image to be displayed through the image input interface, and then converts the analog signal of the image into a digital signal through photoelectric conversion to obtain the initial pixel brightness of the image to be displayed. It can be understood that the initial pixel brightness refers to the initial pixel brightness when the image to be displayed is directly directed to the screen for display without being processed by the screen display method provided by the present disclosure. Since the backlight layer of the screen may have uneven brightness, therefore Directly displaying an image based on the initial pixel brightness will result in darker brightness in some areas of the displayed image. For example, in a Mini LED screen, the brightness of the seams of the backlight panel is low, so the display image located at the seams Dark streaks will appear.

Step 102: Use the lowest actual brightness when the screen displays a solid color image according to the initial pixel brightness corresponding to a single pixel point as the target pixel brightness corresponding to the single pixel point to obtain the target pixel corresponding to each of the pixel points. brightness.

In the embodiment of the present disclosure, considering that the backlight panel of the screen cannot be accurately adjusted according to the pixel granularity, in order to keep the pixel brightness of the screen consistent after correction, the present disclosure achieves adjustment of the pixel brightness by adjusting the LCD pixel value. adjust. The principle is as follows:

The screen display brightness formula is as follows (1):
luma＝L _BL ×P _LCD (1)

Among them, luma is the screen display brightness, L _BL is the backlight brightness, and P _LCD is the transmittance of the image display layer. Since the transmittance is proportional to the pixel brightness, that is, P _LCD =k*l _LCD , it is actually the sum of the backlight brightness and Pixel brightness jointly determines the display brightness of the screen. Since the backlight brightness of the low-brightness area of the screen is low, the screen display brightness there is lower than that of other areas. Therefore, the pixel brightness of the display area with normal brightness is reduced so that the overall screen brightness is consistent with the pixel brightness of the low-brightness area. To achieve the purpose of equalizing the overall brightness of the screen.

Furthermore, consider that when the pixel brightness in the normal brightness area takes the maximum value, that is, the three RGB color channels all take the value 255, the pixel brightness in the low brightness area cannot be increased, so the pixel brightness in the normal brightness area can only be reduced. At the same time, in order to ensure that the gamma of all pixels in grayscale is consistent, Therefore, when selecting pixels at all positions on the screen to display a solid grayscale image with the same pixel brightness under the current pixel brightness, the minimum value of the actual pixel brightness on the screen is used as the target correction value for brightness. In addition, the purpose of this adjustment is to adjust the brightness of the entire screen. , so the lowest actual brightness selected is the minimum brightness value among all rows and rows of pixels.

For ease of understanding, refer to formula (2):

Among them, L _BL is the backlight brightness, P _LCD (i) is the transmittance of the i-th pixel in the image display layer, k is the proportion coefficient, l _LCD (i) is the brightness value of the current pixel, α(i) is the current The brightness adjustment value of the pixel. It can be seen that by adjusting the brightness adjustment value, the pixel brightness of each pixel in the image to be displayed can be adjusted to a display effect that is consistent with the lowest actual brightness of the screen backlight when it is displayed according to the initial pixel brightness.

In the embodiment of the present disclosure, the screen controller determines, based on the initial pixel brightness of a single pixel in the image to be displayed, the actual lowest pixel brightness actually displayed on the screen when the screen displays a solid grayscale image corresponding to the initial pixel brightness, as The target pixel brightness of this single pixel. Then, the screen controller can obtain the target pixel brightness corresponding to each pixel in the image to be displayed in the above manner. It can be understood that since each pixel in the image to be displayed is adjusted to the actual lowest brightness of the screen under its corresponding initial pixel brightness, the brightness level of all pixels in the screen can remain consistent, that is, if the initial pixel brightness in the screen is the same The actual pixel brightness displayed on the screen for each pixel remains consistent, ensuring the uniformity of the screen display. It should be noted that a solid-color grayscale image refers to an image in which the grayscale of each pixel in the entire image is the same. The grayscale can be converted into brightness through the gamma conversion coefficient, that is, the grayscale of the solid-color grayscale image is the original pixel. The brightness is the gray value obtained by converting the gamma conversion coefficient.

For example, the actual lowest brightness when the screen displays a pure grayscale image according to the initial pixel brightness can be obtained by performing an experimental test on the screen in advance and then recording it. Of course, it can also be measured in real time during actual use. Specifically, it can be based on Actual demand settings are not limited here.

Step 103: Display each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness.

In the embodiment of the present disclosure, the screen controller analyzes and processes the target pixel brightness of each pixel in the image to be displayed and performs digital-to-analog conversion to send an output signal of the image to be displayed to the screen through the video output interface. Since the pixel brightness of each pixel in the output image to be displayed is the lowest actual brightness when the screen displays a pure grayscale image with its initial pixel brightness, even if there is a screen display due to the low backlight brightness of the backlight layer When the local brightness of the image is low, the pixel brightness of the pixels in the normal brightness area can also be reduced to the same pixel brightness as the lower brightness area, thereby ensuring the uniformity of the pixel brightness on the screen.

In the embodiment of the present disclosure, before the image is displayed on the screen, the initial pixel brightness of each pixel in the image to be displayed is adjusted to the lowest actual brightness when the screen displays a pure grayscale image with the initial pixel brightness, thereby making the normal brightness area of the screen The brightness level of the pixels can be reduced to be consistent with the brightness level of the lower brightness area. Even if the local brightness of the backlight layer of the screen is low, the brightness uniformity of the image displayed on the screen can be ensured.

Optionally, referring to Figure 3, step 102 includes:

Step 1021: Query the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table. The brightness adjustment value is used to represent the initial brightness of the screen corresponding to the pixel. Pixel brightness is the numerical relationship between the lowest actual brightness when displaying a solid color image and the initial pixel brightness.

Step 1022: Use the brightness adjustment value to reduce the initial pixel brightness to a target pixel brightness.

In the embodiment of the present disclosure, the brightness correction lookup table includes a mapping relationship between the initial pixel brightness, pixel point position and brightness adjustment value. The brightness correction lookup table can pre-control the collection when the screen displays solid color images of different gray levels. After calculating the actual pixel brightness at different pixel positions, the brightness adjustment value is calculated based on the numerical relationship between the lowest actual brightness and the actual pixel brightness of the pixel, and is obtained by establishing a mapping relationship between the pixel position and the pixel brightness. Of course, the brightness adjustment value in the brightness correction lookup table can also be set by the user based on the evaluation after evaluating the brightness of the screen. The specific settings can be set according to actual needs, and are not limited here.

It can be understood that if the pixel position is in a low brightness area, the initial pixel brightness of the pixel may be the lowest actual brightness, so the brightness adjustment value will be smaller, and if the pixel position is in a normal brightness area, then the brightness adjustment value will be smaller. There is a certain difference between the initial pixel brightness and the lowest actual brightness of the pixel If different, the corresponding brightness adjustment value will be obviously larger than that of the pixels located in the low-brightness area. It can be seen that if the initial pixel brightness is the same but the pixel position is different, the corresponding brightness adjustment value will also be different. Therefore, the brightness correction lookup table needs to establish a mapping relationship between the initial pixel brightness, the pixel position and the brightness adjustment value.

The screen controller calculates based on the data relationship between the brightness adjustment value and the initial pixel brightness to obtain the target pixel brightness corresponding to the pixel. The numerical relationship can be a numerical relationship in the form of functions such as addition, subtraction and multipliers, so that the screen controller can adjust the brightness to the initial pixel brightness and bring it into the function for calculation to obtain the target pixel brightness.

The embodiment of the present disclosure records the mapping relationship between the brightness adjustment value of the pixel and the initial pixel brightness and pixel position through a preset brightness correction lookup table, so that it can be directly queried by the screen controller during actual use, and provides Efficiency of brightness correction.

Optionally, the initial pixel brightness includes: the initial sub-pixel brightness of each sub-pixel included in the pixel point, and the target pixel brightness includes: the target of each sub-pixel included in the pixel point. Sub-pixel brightness, the brightness adjustment value includes: the sub-pixel brightness adjustment value of each sub-pixel point contained in the pixel point. Referring to Figure 4, the step 1021 includes:

Step 10211, query the brightness correction lookup table to find the brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs, as the sub-pixel point of the sub-pixel point. Pixel brightness adjustment value.

It should be noted that sub-pixels are smaller pixel units among pixels. For example, for a pixel with three RGB color channels, its sub-pixels can be three sub-pixels of R, G, and B channels respectively. Correspondingly, since each sub-pixel displays brightness separately, the sub-pixel brightness of each sub-pixel contained in a certain pixel also needs to be adjusted separately. After the brightness adjustment, each sub-pixel will be obtained. The target sub-pixel brightness corresponding to the pixel point, the brightness adjustment value responsiveness queried when adjusting it will include the sub-pixel brightness adjustment values corresponding to different sub-pixel points.

The step 1022 includes:

Step 10221: Use the sub-pixel brightness adjustment value to reduce the initial sub-pixel brightness to the target sub-pixel brightness.

In the embodiment of the present disclosure, considering that the brightness correction lookup table records the mapping relationship between different pixel brightness, pixel position and brightness adjustment value, it is impossible to directly convert sub-pixel points into Just use the pixel position of the pixel to which it belongs as the position of the sub-pixel, and the initial sub-pixel brightness can be directly extracted from the initial pixel brightness of the pixel for the channel type of the image to be displayed, for example, for the three channels of RGB Initial pixel brightness, the data format of the initial pixel brightness should be L = (L _R , _LG , _LB ), then _LR is the initial sub-pixel brightness of the sub-pixel point of the R channel, and the others are the same.

The screen controller obtains the sub-pixel brightness adjustment value corresponding to each sub-pixel by querying the brightness correction lookup table based on the initial sub-pixel brightness of each sub-pixel and the pixel position of the pixel where the sub-pixel is located. And use the sub-pixel brightness adjustment value to reduce the initial sub-pixel brightness to the target sub-pixel brightness, and then the obtained target sub-pixel brightness of the sub-pixels contained in each pixel can constitute the target pixel brightness of the pixel, so as to for subsequent screen display.

Embodiments of the present disclosure improve the accuracy of screen brightness correction by individually adjusting the brightness for each sub-pixel in the pixel.

Optionally, referring to Figure 5, step 10211 includes:

Step 102111: Query in the brightness correction lookup table multiple adjacent points adjacent to the initial sub-pixel brightness and the point corresponding to the pixel point position.

Step 102112: Calculate the sub-pixel brightness adjustment value corresponding to the sub-pixel point according to the adjacent brightness adjustment value corresponding to the adjacent point.

In the embodiment of the present disclosure, considering that the brightness correction lookup table is measured experimentally, it is difficult to ensure the continuity of the recorded data. That is to say, the data in the brightness correction lookup table has a non-linear mapping relationship. This results in a high probability that the point position that is exactly the same as the initial sub-pixel brightness and pixel point position cannot be directly found from brightness correction.

Specifically, a trilinear interpolation algorithm can be used to query the sub-pixel brightness adjustment value corresponding to each sub-pixel point in the brightness correction lookup table. The trilinear interpolation algorithm can be found in related technologies and will not be described again here.

Optionally, referring to Figure 6, step 101 includes:

Step 1011: Obtain the initial grayscale data of the image to be displayed.

Step 1012: Perform electro-optical conversion on the initial grayscale data to obtain the initial pixel brightness of each pixel point.

The step 103 includes:

Step 1031: Photoelectrically convert the target pixel brightness of each pixel point to obtain the target grayscale data of the image to be displayed.

Step 1032: Output the target grayscale data to the screen, so that the screen displays the image to be displayed.

In this embodiment of the present disclosure, refer to the system architecture diagram shown in Figure 7:

S1. Receive the initial grayscale data of the image to be displayed from the video input interface;

S2. Perform synchronous row scan count (Rcnt) and column scan count (Ccnt) on the input initial grayscale data Gray (r, g, b) of each pixel point to obtain the positioning coordinates (x, y) of the pixel point position. ), x=Ccnt, y=Rcnt;

S3. Perform EOTF (Electro-Optical Transfer Function) electro-optical conversion on the RGB three channel data of the initial grayscale data Gray (r, g, b) of each pixel, that is, use the gamma = γ used by the current system as the conversion coefficient. , the calculated sub-pixel brightness of the three channels of the pixel is L _R =γ(r), L _G =γ(g), L _B =γ(b), that is, the different sub-pixel brightness under the initial pixel brightness is z _R = L _R , z _G = L _G , z _B = L _B , in the case of Mini LED screen, the sub-pixel brightness can be selected to the maximum value, because usually the backlight panel of the Mini LED screen is usually displayed during display in order to ensure the backlight brightness. The sub-pixel brightness with the highest brightness among the sub-pixel points of the pixel is selected for display, thereby ensuring that the selected sub-pixel brightness is consistent with the backlight panel.

S4. According to the positioning coordinates (x, y) of the pixel point position generated by S1 and the sub-pixel brightness z generated by S2, the three-dimensional coordinate information of the three sub-pixels is obtained: (x, y, z _R ), (x, y, z _G ), (x, y, z _B ). Using the pre-established brightness correction lookup table LUT (X, Y, Z), perform LUT search and trilinear interpolation on the three sub-pixel channels of the pixel point P to obtain the mapped sub-pixel brightness adjustment value α _R. α _G , α _B .

S5. Correct the sub-pixel brightness L _R , L _G , and _LB of the three sub-pixels of the pixel point P using the corresponding adjustment weights α _R , α _G , and α _B respectively, and obtain the new pixel brightness Luma'(Lr ', Lg', Lb'): {Lr'=L _R *α _R , L g'= _LG *α _G , Lb'=L _B *α _B }, which is the corrected three target sub-pixels. Brightness Target pixel brightness.

S6. Perform OETF (Optical-Electro Transfer Function) photoelectric conversion on the target pixel brightness Luma'(Lr',Lg',Lb') to obtain the corrected target grayscale data. P'(r', g', b'): {r'=γ-1(Lr')G'=γ-1(LG'), Bl'=γ-1(LB')}.

Optionally, referring to Figure 8, the brightness correction lookup table is obtained through the following steps:

Step 201: Obtain actual brightness distribution data when the screen displays multiple solid-color grayscale images with different brightness levels.

In the embodiment of the present disclosure, the screen controller can input Z solid-color grayscale images Gray {G ₀ , G ₁ ,..., G _Z } with equal difference brightness levels to the screen, and then use an industrial camera to capture the screen to actually display the solid color The actual brightness distribution map of the grayscale image Luma {L ₀ , L ₁ .,..., L _Z }, where Z represents the number of grayscale samples, and the brightness difference of any adjacent grayscale image is guaranteed to be equal, from grayscale to brightness The conversion can be completed using the system's default gamma conversion system.

Optionally, referring to Figure 9, step 201 includes:

Step 2011: Obtain the actual brightness distribution image when the screen displays each of the solid-color grayscale images.

Step 2012: Perform dense sampling on the low brightness areas in the actual brightness distribution image and sparse sampling on the normal brightness areas in the actual brightness distribution image to obtain actual brightness distribution data.

In the embodiment of the present disclosure, after obtaining the actual brightness distribution map of the screen, the brightness distribution map needs to be sampled to obtain brightness distribution data. Considering that the subsequent main focus is on the pixel brightness of low-brightness areas, during sampling, low-brightness areas are densely sampled at a higher sampling density, while non-low-brightness areas are sparsely sampled at a lower sampling density. Two The relationship between sampling densities is relative. The low brightness area and the normal brightness area can be determined based on actual observation or the attribute parameters of the screen. For example, the brightness level of each display area can be obtained by observing the brightness of the screen in advance, or based on the attribute parameters of the backlight layer of the screen. For example, due to structural characteristics of some types of screen backlight layers, the backlight brightness in specific areas is low. The specific setting method can be set according to actual needs and is not limited here.

Optionally, the step 2012 includes: when the screen is a Mini LED screen, densely sampling the seams of the backlight panel in the actual brightness distribution image, and sampling the seams of the non-backlight panel in the actual brightness distribution image. Sparse sampling is performed at the seams to obtain actual brightness distribution data.

In the embodiment of the present disclosure, referring to Figure 10, when the screen is a Mini LED screen, since the backlight layer is a spliced light panel, there is inevitably a problem of low backlight brightness at the joints of the light panels due to factors such as technology. Therefore, The seams of the backlight layer can be directly used as low-brightness areas for dense sampling, and The non-seam areas can be used as normal brightness areas for sparse sampling.

Specifically, X sampling points are sampled at non-uniform intervals in the horizontal direction, and Y sampling points are sampled at non-uniform intervals in the vertical direction; during non-uniform sampling, dense sampling is performed at dark stripes and sparse sampling at non-dark stripes; after completion of sampling , obtain the two-dimensional distributed discrete point map l(x, y, z)=Lumaz(X, Y) under Z brightness. Each point data l(x, y, z) represents the pixel brightness value at the xy position of the screen coordinates under the brightness LumaZ.

Step 202: Determine the lowest actual brightness in the actual brightness distribution data of each brightness level.

In the embodiment of the present disclosure, in order to ensure that the corrected pixel brightness has uniform display brightness, the lowest actual brightness among the actual brightness distribution data under different brightness levels needs to be selected as the target correction value.

Step 203: Calculate the brightness adjustment value between the actual brightness of each pixel in the actual brightness distribution data and the lowest actual brightness.

Step 204: Establish a mapping relationship between the brightness adjustment value, the actual brightness, and the pixel position of the pixel, and obtain the brightness correction lookup table.

In the embodiment of the present disclosure, the brightness correction lookup table used in the above screen display method of the present disclosure is obtained by establishing a three-dimensional lookup table between the brightness adjustment and the actual brightness z and pixel position (x, y).

Embodiments of the present disclosure construct a brightness correction lookup table by performing brightness detection on the screen in advance for query and use by the screen controller when displaying images, thereby improving the efficiency of screen brightness correction.

Optionally, step 203 includes: using the ratio between the lowest actual brightness and the actual brightness of each pixel in the actual brightness distribution data as the brightness adjustment value corresponding to each pixel.

In the embodiment of the present disclosure, the brightness adjustment value can be calculated through the following formula (3):

Among them, α is the brightness adjustment value of the pixel at the x, y coordinate position under the z brightness level; l _min =Min(l(x, y, z)), represents the actual lowest brightness under the z brightness level.

The present disclosure can easily correct the pixel brightness by characterizing the brightness adjustment value based on the numerical relationship between the lowest actual brightness and the ratio of the pixel brightness.

FIG. 11 schematically shows the structure of a screen display device 30 provided by the present disclosure. Figures, including:

The input module 301 is configured to obtain the initial pixel brightness corresponding to each pixel in the image to be displayed;

The processing module 302 is configured to use the lowest actual brightness when the screen displays a pure color image according to the initial pixel brightness corresponding to a single pixel point as the target pixel brightness corresponding to the single pixel point, so as to obtain the phase of each pixel point. Corresponding target pixel brightness;

The display module 303 is configured to display each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness.

Optionally, the processing module 302 is also configured to:

Query the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table. The brightness adjustment value is used to represent the initial pixel brightness display of the screen corresponding to the pixel. The numerical relationship between the lowest actual brightness of a pure color image and the initial pixel brightness;

The brightness adjustment value is used to reduce the initial pixel brightness to a target pixel brightness.

Optionally, the initial pixel brightness includes: the initial sub-pixel brightness of each sub-pixel included in the pixel point, and the target pixel brightness includes: the target of each sub-pixel included in the pixel point. Sub-pixel brightness, the brightness adjustment value includes: the sub-pixel brightness adjustment value of each sub-pixel point included in the pixel point;

The processing module 302 is also configured to:

Query in the brightness correction lookup table to find the brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs, as the sub-pixel brightness adjustment of the sub-pixel point. value;

Using the brightness adjustment value to reduce the initial pixel brightness to a target pixel brightness includes:

The initial sub-pixel brightness is reduced to a target sub-pixel brightness using the sub-pixel brightness adjustment value.

Optionally, the processing module 302 is also configured to:

Query in the brightness correction lookup table a plurality of adjacent points adjacent to the initial sub-pixel brightness and the point corresponding to the pixel position;

The sub-pixel brightness adjustment value corresponding to the sub-pixel point is calculated according to the adjacent brightness adjustment value corresponding to the adjacent point.

Optionally, the device further includes: a lookup table building module configured to:

Obtain the actual performance of the screen when displaying multiple solid-color grayscale images with different brightness levels. Luminance distribution data;

Determine the lowest actual brightness in the actual brightness distribution data for each brightness level;

Calculate the brightness adjustment value between the actual brightness of each pixel point in the actual brightness distribution data and the lowest actual brightness;

A mapping relationship between the brightness adjustment value, the actual brightness and the pixel position of the pixel is established to obtain the brightness correction lookup table.

Optionally, the query table building module is also configured as:

The ratio between the lowest actual brightness and the actual brightness of each pixel in the actual brightness distribution data is used as the brightness adjustment value corresponding to each pixel.

Optionally, the query table building module is also configured as:

Obtain the actual brightness distribution image of the screen when each of the solid-color grayscale images is displayed respectively;

Actual brightness distribution data is obtained by densely sampling low brightness areas in the actual brightness distribution image and sparsely sampling normal brightness areas in the actual brightness distribution image.

Optionally, the query table building module is also configured as:

When the screen is a Mini LED screen, dense sampling is performed on the seams of the backlight panel in the actual brightness distribution image, and sparse sampling is performed on the seams of the non-backlight panel in the actual brightness distribution image to obtain the actual brightness distribution. data.

Optionally, also configured to:

Obtain the initial grayscale data of the image to be displayed;

Perform electro-optical conversion on the initial grayscale data to obtain the initial pixel brightness of each pixel;

The display module 303 is also configured to:

Perform photoelectric conversion on the target pixel brightness of each pixel point to obtain the target grayscale data of the image to be displayed;

The target grayscale data is output to the screen, so that the screen displays the image to be displayed.

Embodiments of the present disclosure adjust the initial pixel brightness of each pixel in the image to be displayed to the lowest actual brightness when the screen displays a pure grayscale image of the initial pixel brightness before displaying the image on the screen, thereby making the normal brightness area of the screen The brightness level of the pixel can be reduced to be consistent with the brightness level of the lower brightness area. Even if the local brightness of the backlight layer of the screen is low, the brightness uniformity of the image displayed on the screen can be ensured.

Some embodiments of the present disclosure provide a display device, including: a display screen and a screen controller;

The screen controller is configured to output the target pixel brightness of the image to be displayed to the display screen by executing the above-mentioned screen display method;

The display screen is configured to display the image to be displayed based on the target pixel brightness.

Embodiments of the present disclosure adjust the initial pixel brightness of each pixel in the image to be displayed to the lowest actual brightness when the screen displays a pure grayscale image of the initial pixel brightness before displaying the image on the screen, thereby making the normal brightness area of the screen The brightness level of the pixel can be reduced to be consistent with the brightness level of the lower brightness area. Even if the local brightness of the backlight layer of the screen is low, the brightness uniformity of the image displayed on the screen can be ensured.

The device embodiments described above are only illustrative. 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 may be located in One location, or it can be distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Persons of ordinary skill in the art can understand and implement the method without any creative effort.

Various component embodiments of the present disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components in a computing processing device according to embodiments of the present disclosure. The present disclosure may also be implemented as an apparatus or apparatus program (eg, computer program and computer program product) for performing part or all of the methods described herein. Such a program implementing the present disclosure may be stored on a non-transitory computer-readable medium, or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, or provided on a carrier signal, or in any other form.

For example, Figure 12 illustrates a computing processing device that may implement methods in accordance with the present disclosure. The computing processing device conventionally includes a processor 410 and a computer program product in the form of memory 420 or non-transitory computer-readable medium. Memory 420 may be electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. The memory 420 has a storage space 430 for program code 431 for executing any method steps in the above-described methods. For example, the storage space 430 for the program code may include respectively used to implement the above methods. Each program code 431 for the various steps in the method. These program codes can be read from or written into one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such computer program products are typically portable or fixed storage units as described with reference to FIG. 13 . The storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 420 in the computing processing device of FIG. 12 . The program code may, for example, be compressed in a suitable form. Typically, the storage unit includes computer readable code 431', ie code that can be read by, for example, a processor such as 410, which code, when executed by a computing processing device, causes the computing processing device to perform the methods described above. various steps.

It should be understood that although various steps in the flowchart of the accompanying drawings are shown in sequence as indicated by arrows, these steps are not necessarily performed in the order indicated by arrows. Unless explicitly stated in this article, the execution of these steps is not strictly limited in order, and they can be executed in other orders. Moreover, at least some of the steps in the flow chart of the accompanying drawings may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, and their execution order is also It does not necessarily need to be performed sequentially, but may be performed in turn or alternately with other steps or sub-steps of other steps or at least part of the stages.

Reference herein to "one embodiment," "an embodiment," or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In addition, please note that the examples of the word "in one embodiment" here do not necessarily all refer to the same embodiment.

In the instructions provided here, a number of specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this description.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the element claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, third, etc. does not indicate any order. These can be Words are interpreted as names.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure, but not to limit it; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications may be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions may be made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims (14)

A screen display method, characterized in that the method includes: Obtain the initial pixel brightness corresponding to each pixel in the image to be displayed; The lowest actual brightness when the screen displays a solid color image according to the initial pixel brightness corresponding to a single pixel point is used as the target pixel brightness corresponding to the single pixel point to obtain the target pixel brightness corresponding to each of the pixel points; Each pixel point in the image to be displayed is displayed on the screen according to the corresponding target pixel brightness. The method according to claim 1, characterized in that the lowest actual brightness when the screen displays a pure color image according to the initial pixel brightness corresponding to a single pixel point is used as the target pixel brightness corresponding to the single pixel point. ,include: Query the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table. The brightness adjustment value is used to represent the initial pixel brightness display of the screen corresponding to the pixel. The numerical relationship between the lowest actual brightness of a pure color image and the initial pixel brightness; The brightness adjustment value is used to reduce the initial pixel brightness to a target pixel brightness. The method according to claim 2, wherein the initial pixel brightness includes: the initial sub-pixel brightness of each sub-pixel point included in the pixel point, and the target pixel brightness includes: the pixel point. The target sub-pixel brightness of each sub-pixel included in the pixel, and the brightness adjustment value includes: the sub-pixel brightness adjustment value of each sub-pixel included in the pixel; Querying the brightness adjustment value that matches the initial pixel brightness and pixel position of the pixel in the brightness correction lookup table includes: Query in the brightness correction lookup table to find the brightness adjustment value that matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs, as the sub-pixel brightness adjustment of the sub-pixel point. value; Using the brightness adjustment value to reduce the initial pixel brightness to a target pixel brightness includes: The initial sub-pixel brightness is reduced to a target sub-pixel brightness using the sub-pixel brightness adjustment value. The method according to claim 3, characterized in that, the query in the brightness correction lookup table matches the initial sub-pixel brightness of the sub-pixel point and the pixel position of the pixel point to which the sub-pixel point belongs. The brightness adjustment value, as the sub-pixel brightness adjustment value of the sub-pixel point, includes: Query in the brightness correction lookup table a plurality of adjacent points adjacent to the initial sub-pixel brightness and the point corresponding to the pixel position; The sub-pixel brightness adjustment value corresponding to the sub-pixel point is calculated according to the adjacent brightness adjustment value corresponding to the adjacent point. The method according to claim 2, characterized in that the brightness correction lookup table is obtained through the following steps: Obtain actual brightness distribution data when the screen displays multiple solid-color grayscale images with different brightness levels; Determine the lowest actual brightness in the actual brightness distribution data for each brightness level; Calculate the brightness adjustment value between the actual brightness of each pixel point in the actual brightness distribution data and the lowest actual brightness; A mapping relationship between the brightness adjustment value, the actual brightness and the pixel position of the pixel is established to obtain the brightness correction lookup table. The method of claim 5, wherein calculating the brightness adjustment value between the actual brightness of each pixel in the actual brightness distribution data and the lowest actual brightness includes: The ratio between the lowest actual brightness and the actual brightness of each pixel in the actual brightness distribution data is used as the brightness adjustment value corresponding to each pixel. The method according to claim 5, characterized in that said obtaining the actual brightness distribution data when the screen displays a plurality of solid color grayscale images with different brightness levels, includes: Obtain the actual brightness distribution image of the screen when each of the solid-color grayscale images is displayed respectively; Actual brightness distribution data is obtained by densely sampling low brightness areas in the actual brightness distribution image and sparsely sampling normal brightness areas in the actual brightness distribution image. The method according to claim 7, characterized in that said analyzing the actual brightness The low-brightness areas in the cloth image are densely sampled, and the normal brightness areas in the actual brightness distribution image are sparsely sampled to obtain actual brightness distribution data, including: When the screen is a Mini LED screen, dense sampling is performed on the seams of the backlight panel in the actual brightness distribution image, and sparse sampling is performed on the seams of the non-backlight panel in the actual brightness distribution image to obtain the actual brightness distribution. data. The method of claim 1, wherein obtaining the initial pixel brightness of each pixel in the image to be displayed includes: Obtain the initial grayscale data of the image to be displayed; Perform electro-optical conversion on the initial grayscale data to obtain the initial pixel brightness of each pixel; Displaying each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness includes: Perform photoelectric conversion on the target pixel brightness of each pixel point to obtain the target grayscale data of the image to be displayed; The target grayscale data is output to the screen, so that the screen displays the image to be displayed. A screen display device, characterized in that the device includes: An input module configured to obtain the initial pixel brightness corresponding to each pixel in the image to be displayed; The processing module is configured to use the lowest actual brightness when the screen displays a solid color image according to the initial pixel brightness corresponding to a single pixel point as the target pixel brightness corresponding to the single pixel point, so as to obtain the corresponding brightness of each pixel point. The target pixel brightness; A display module is configured to display each pixel in the image to be displayed on the screen according to the corresponding target pixel brightness. A display device, characterized by including: a display screen and a screen controller; The screen controller is configured to output the target pixel brightness of the image to be displayed to the display screen by executing the screen display method according to any one of claims 1-9; The display screen is configured to display the image to be displayed based on the target pixel brightness. A computing processing device, characterized by including: A memory having computer readable code stored therein; One or more processors, when the computer readable code is executed by the one or more processors, the computing processing device performs the screen display method of any one of claims 1-9. A computer program comprising computer readable code that, when run on a computing processing device, causes the computing processing device to perform the steps of any one of claims 1-9 screen display method. A non-transitory computer-readable medium, characterized in that a computer program for the screen display method according to any one of claims 1-9 is stored therein.