CN112150972B - Image compensation method and device and display device - Google Patents

Abstract

The present application discloses an image compensation method and device, and a display device. The method includes: controlling sub-pixels of each color in a first area and a second area of a display panel, based on each of m first grayscales Gray-scale light emission; when the sub-pixels of each color in the first area and the second area emit light based on each first gray-scale, according to the first adjustment operation for the display panel, it is determined that each color is in each first gray-scale adjust the gray scale of the adjustment sub-pixel according to the target parameter of the adjustment sub-pixel corresponding to the first area in the image to be displayed; wherein, the adjustment sub-pixel in the image to be displayed includes: For the sub-pixels of the gray scale, adjusting the target parameter of the sub-pixels includes: adjusting the gray scale adjustment degree of the color of the sub-pixels under the gray scale adjustment of the sub-pixels. The present application can solve the problem that the function of the current image compensation device is relatively single. The present application is used to perform image compensation on a display device.

Description

Image compensation method and device, and display device

technical field

The present application relates to the field of display technology, and in particular, to an image compensation method and device, and a display device.

Background technique

With the development of display technology, organic light-emitting diode (Organic Light Emitting Diode, OLED) display devices are increasingly used in high-performance display products due to their characteristics of self-luminescence, fast response, and wide viewing angle. The OLED display device includes an OLED display panel and a display control chip, and the OLED display panel includes an OLED and a thin film transistor (Thin Film Transistor, TFT). Wherein, the display control chip is used for inputting a potential to the TFT, and the TFT is used for outputting a potential to the OLED according to the input potential, so as to drive the OLED to emit light. As the use time of the OLED display panel increases, both the OLED and the TFT will age, thereby affecting the display effect of the OLED display panel. Therefore, image compensation for the OLED display panel is usually required.

At present, an image compensation device is usually used to perform image compensation on an OLED display panel. The image compensation process of the image compensation device may include: firstly detecting the input potential of the TFT, and determining the value of each TFT based on the difference between the input potential and the output potential of the TFT. degree of aging. After that, according to the aging degree of the TFT, the input potential of each TFT is adjusted to adjust the potential output from the TFT to the OLED, thereby adjusting the luminous brightness of the OLED.

However, since the image compensation device can only perform image compensation on the TFT, the function of the image compensation device is relatively single.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an image compensation method and device, and a display device, which can solve the problem of single function of the current image compensation method. The technical solution is as follows:

In a first aspect, an image compensation method is provided, which is applied to an image compensation device, and the method includes:

Control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first grayscales, m≥1; in the first area and the first grayscale When the sub-pixels of each color in the second area emit light based on each of the first grayscales, according to the first adjustment operation for the display panel, determine the a gray-scale adjustment degree, which is related to the degree of difference between the first area and the second area; according to the target parameter of the adjustment sub-pixel corresponding to the first area in the image to be displayed Adjust the gray scale of the adjustment sub-pixel; wherein, the adjustment sub-pixel in the to-be-displayed image includes: a sub-pixel having the first gray level, and the target parameter of the adjustment sub-pixel includes: the adjustment sub-pixel The grayscale adjustment degree of the color under the grayscale of the adjustment sub-pixel.

It should be noted that the image compensation device can control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first gray scales, and the sub-pixels of each color can emit light based on each first gray scale. When emitting light at a level, the gray level adjustment of each color in the first gray level is determined according to the operation on the display panel, and the gray level adjustment of the sub-pixels in the to-be-displayed image is performed based on the gray level adjustment, so that the TFT aging or the OLED aging is not affected. The resulting deterioration of the display effect can be performed with image compensation, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

Optionally, the method further includes: determining the grayscale adjustment of each color at n second grayscales according to the grayscale adjustment degrees of each color at the m first grayscales The adjustment sub-pixels in the to-be-displayed image further include: sub-pixels having the second gray scale. For example, the image compensation apparatus may perform operations such as fitting, interpolation, or averaging on the gray scale adjustment degrees of each color under the m first gray scales, so as to determine the gray scale adjustment of each color under the n second gray scales. Grayscale adjustment.

Optionally, both the first area and the second area include: red sub-pixels, green sub-pixels and blue sub-pixels, the control display panel in the first area and the second area of each color sub-pixels. The pixel emits light based on each of the m first gray levels, including: in a first stage, controlling the red sub-pixels and the green sub-pixels in the first area and the second area The pixels emit light based on each of the first grayscales at the same time; in the second stage, the blue sub-pixels in the first region and the second region are controlled to emit light based on each of the first grayscales.

For example, since the aging speeds of the red sub-pixels and the green sub-pixels are generally similar, the aging speed of the blue sub-pixels is much greater than that of the red sub-pixels or the green sub-pixels. Therefore, when performing image compensation, the image compensation device can firstly control the red sub-pixels and green sub-pixels in the first area and the second area to emit light based on each first grayscale at the same time, and at this time, the light emitted by each pixel is red The light emitted by the sub-pixels and the light emitted by the green sub-pixels are mixed to form yellow light. The image compensation device may then control the blue sub-pixels in the first area and the second area to emit light based on each of the first grayscales.

Optionally, the grayscale adjustment includes a grayscale coefficient, and according to the target parameter of the adjustment subpixel corresponding to the first region in the to-be-displayed image, adjusting the grayscale of the adjustment subpixel includes: when When the brightness adjustment mode of the display panel is the PWM mode, the gray scale of the adjustment sub-pixel is adjusted as: the product of the gray scale of the adjustment sub-pixel and the gray scale coefficient; wherein, the gray scale of the adjustment sub-pixel is The coefficient is: the gray scale coefficient of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel.

Optionally, the display panel is a folding display panel.

Optionally, the display panel includes a plurality of sub-panels connected in sequence, the first area belongs to a first sub-panel of the plurality of sub-panels, and the second area belongs to the first sub-panel of the plurality of sub-panels. A sub-panel is connected to a second sub-panel.

Optionally, the method further includes: when controlling the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each first grayscale of the m first grayscales, if any If the plurality of sub-panels include a third sub-panel, the sub-pixels in the target area in the display panel are controlled not to emit light; wherein, the third sub-panel, the first sub-panel and the second sub-panel are connected in sequence , the first sub-panel includes: a connection area and the first area sequentially arranged along the direction of the third sub-panel toward the second sub-panel, the target area includes: the connection area, and an area of the third sub-panel close to the first sub-panel.

It should be noted that when the multiple sub-panels of the folded display panel include the third sub-panel, when the user observes the difference between the first area and the second area according to the human eye, the target area will affect the observation result of the human eye. , therefore, the sub-pixels in the target area are controlled not to emit light, which can avoid the influence of the target area on the user's observation result when the user observes the difference between the first area and the second area according to the human eye, thereby improving the image compensation efficiency. accuracy.

Optionally, after determining the gray scale adjustment of each color under each first gray scale, the method further includes: controlling the first sub-panel and the third sub-panel to display white color. picture; when the first sub-panel and the third sub-panel display the white picture, if the first instruction operation for the display panel is used to instruct the update of each color in the m first The gray-scale adjustment degree in the gray-scale, then control the sub-pixels of each color in the first area and the third area in the third sub-panel, and emit light based on the first gray-scale; in the When the sub-pixels of each color in the first area and the third area emit light based on each first grayscale, according to the second adjustment operation for the display panel, it is determined that each color is An updated gray level adjustment degree under a first gray level, the updated gray level adjustment degree is related to the degree of difference between the first area and the third area.

For example, the image compensation apparatus may control all sub-pixels located in the first sub-panel and the third sub-panel to emit light, so as to control the first sub-panel and the third sub-panel to display a white picture. The image compensation device may control the display panel to display a selection prompt box when the first sub-panel and the third sub-panel display a white picture, so that the user can perform the second instruction operation according to the content prompted in the selection prompt box. It should be noted that, when the display panel further includes a third sub-panel, the aging degree of the first sub-panel and the third sub-panel may be different, resulting in the possibility of a difference between the first sub-panel and the third sub-panel when displaying images. There is an obvious dividing line, therefore, the image compensation device controls the display panel to display a white picture, so that the user can observe the difference between the first area and the second area through human eyes, so as to determine whether it is necessary to adjust the first sub-panel and the third sub-panel. The difference between the panels is compensated for the image, which further improves the image compensation effect.

Optionally, the controlling the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m types of first grayscales includes: controlling each of the first area and the second area. The color sub-pixels emit light based on the m first grayscales at the first digital brightness, and the target parameters corresponding to the adjustment subpixels further include: grayscale adjustment parameters under the digital brightness corresponding to the to-be-displayed image, The grayscale adjustment parameter under the first digital brightness is a default value; adjusting the grayscale of the adjustment sub-pixel includes: when the digital brightness corresponding to the to-be-displayed image belongs to the brightness including the first digital brightness During the collection, the gray scale of the adjustment sub-pixels is adjusted. For example, the image compensation apparatus may store a luminance set to which the first digital luminance belongs. Wherein, the first digital brightness may be the highest digital brightness that the display panel can achieve.

Optionally, the method further includes: when the brightness adjustment mode of the display panel is a direct current DC mode, after determining the gray scale adjustment degree of each color at the first gray scale, based on The gray scale adjustment degree of the test color under the test gray scale adjusts the test gray scale, wherein the test color is the color of any sub-pixel in the first area and the second area, and the test color The grayscale is any one of the m first grayscales and the n second grayscales; controlling each second digital brightness of the subpixels of the test color in the x second digital brightnesses emitting light based on the adjusted test gray scale, wherein the brightness set further includes: the x kinds of second digital brightness, x≥1; the sub-pixels in the test color are in each of the second When emitting light based on the adjusted test gray scale under digital brightness, the gray scale adjustment degree under each second digital brightness is determined according to the third adjustment operation for the display panel; according to each second digital brightness The grayscale adjustment degree under the digital brightness is determined, and the grayscale adjustment parameter under each second digital brightness is determined; wherein, the grayscale adjustment parameter under the i-th second digital brightness Pi=Qi*P1/V1, 1≤ i≤x, Qi represents the brightness data under the i-th second digital brightness, P1 represents the grayscale adjustment parameter under the first digital brightness, and V1 represents the grayscale adjustment of the test color under the test grayscale Spend. For example, when the gray scale adjustment includes a gray scale coefficient, the image compensation apparatus may adjust the test gray scale as: the product of the test gray scale and the gray scale coefficient.

Optionally, the method further includes: according to the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under the x second digital brightness, determining the grayscale under y third digital brightness. and the brightness set further includes: the y third digital brightness. For example, the image compensation device may perform operations such as fitting, interpolation, or averaging on the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under x kinds of second digital brightnesses to determine y kinds of third Grayscale adjustment parameter under digital brightness.

Optionally, the grayscale adjustment degree includes a first grayscale coefficient, the grayscale adjustment parameter includes a second grayscale coefficient, and according to the target parameter of the adjustment sub-pixel corresponding to the first region in the to-be-displayed image, Adjusting the gray scale of the adjustment sub-pixel includes: adjusting the gray scale of the adjustment sub-pixel to be: the gray scale of the adjustment sub-pixel, the product of the first gray scale coefficient and the second gray scale coefficient; wherein , the first gray-scale coefficient of the adjustment sub-pixel is: the color of the adjustment sub-pixel is the first gray-scale coefficient of the gray-scale of the adjustment sub-pixel, and the second gray-scale coefficient of the adjustment sub-pixel is : the second grayscale coefficient under the digital brightness corresponding to the image to be displayed.

Optionally, before controlling the sub-pixels of the test color to emit light based on the adjusted test grayscale under each of the x second digital brightnesses, the method further includes: acquiring the the white picture to be displayed on the display panel; according to the target parameter of the adjustment sub-pixel corresponding to the first area in the white picture, adjust the gray scale of the adjustment sub-pixel in the white picture; control the The display panel displays the adjusted white picture; controlling the sub-pixels of the test color to emit light based on the adjusted test gray scale under each of the x second digital brightnesses, including: When the display panel displays the white picture, if the second instruction operation on the display panel is used to instruct image compensation, control the sub-pixels of the test color in each of the x second digital luminances. Under the second digital brightness, the light is emitted based on the adjusted test gray scale.

It should be noted that, in the DC dimming mode, the degree of difference between the first area and the second area under different digital brightness may be different. Therefore, the image compensation device can control the display panel to display the adjusted white image to Allows the user to determine whether to perform image compensation.

Optionally, the sub-pixel includes: a thin film transistor TFT, and the method further includes: before the display panel displays the to-be-displayed image, if the input potential and output of the TFT of any sub-pixel in the display panel are When the potential difference is greater than the potential difference threshold, any sub-pixel is controlled not to emit light. It should be noted that when the difference between the input potential and the output potential of the TFT of any sub-pixel is greater than the potential difference threshold, if any sub-pixel emits light, the judgment of the difference between the regions will be affected by the human eye. Therefore, Controlling any of the sub-pixels to not emit light can improve the accuracy of image compensation when the user issues an adjustment operation based on the difference between the regions.

Optionally, the method further includes: controlling the display panel to display an adjustment bar graphic for reflecting the gray scale adjustment degree, and any adjustment operation on the display panel is an operation on the adjustment bar graphic. For example, any adjustment operation may include: lengthening or shortening the adjustment bar graph displayed on the display panel, or sliding a finger up or down at any position on the display panel, and so on.

In a second aspect, an image compensation device is provided, and the image compensation device includes:

The first control module is configured to control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first grayscales, where m≧1.

The first determination module is configured to determine, according to the first adjustment operation for the display panel, when the sub-pixels of each color in the first area and the second area emit light based on each first grayscale, The gray level adjustment degree under a gray level, and the gray level adjustment degree is related to the difference between the first area and the second area.

The first adjustment module is configured to adjust the gray scale of the adjustment sub-pixels according to the target parameters of the adjustment sub-pixels corresponding to the first region in the to-be-displayed image.

The adjustment sub-pixels in the image to be displayed include: sub-pixels having a first gray scale, and the target parameters for adjusting the sub-pixels include: adjusting the gray-scale adjustment of the color of the sub-pixels under the gray-scale adjustment of the sub-pixels.

Optionally, the device further includes:

The second determination module is configured to determine the grayscale adjustment of each color under n second grayscales according to the grayscale adjustment of each color under m first grayscales, and the adjustor in the to-be-displayed image The pixel further includes: a sub-pixel having a second gray scale.

Optionally, both the first area and the second area include: red sub-pixels, green sub-pixels and blue sub-pixels, and the first control module is used for:

In the first stage, the red sub-pixels and the green sub-pixels in the first and second regions are controlled to emit light simultaneously based on each first grayscale.

In the second stage, the blue sub-pixels in the first area and the second area are controlled to emit light based on each first gray scale.

Optionally, the gray scale adjustment includes a gray scale coefficient, and the first adjustment module is used for:

When the brightness adjustment mode of the display panel is the PWM mode, the adjustment of the gray scale of the adjustment sub-pixel is: the product of the gray scale of the adjustment sub-pixel and the gray scale coefficient.

The adjustment of the gray scale coefficient of the sub-pixel is: the gray scale coefficient of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel.

Optionally, the display panel is a folding display panel. Optionally, the display panel includes a plurality of sub-panels connected in sequence, the first area belongs to a first sub-panel of the plurality of sub-panels, and the second area belongs to a second sub-panel of the plurality of sub-panels connected to the first sub-panel.

Optionally, the image compensation device further includes:

The second control module is configured to control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first grayscales, if the plurality of subpanels include For the third sub-panel, the sub-pixels in the target area in the display panel are controlled not to emit light.

The third sub-panel, the first sub-panel and the second sub-panel are connected in sequence, and the first sub-panel includes: a connection area and a first area arranged in sequence along the direction of the third sub-panel toward the second sub-panel, the target area Including: the connection area, and the area of the third sub-panel close to the first sub-panel.

Optionally, the image compensation device further includes:

The third control module is configured to control the first sub-panel and the third sub-panel to display a white picture after determining the gray scale adjustment of each color under each first gray scale.

The fourth control module is used for, when the first sub-panel and the third sub-panel display a white picture, if the first instruction operation for the display panel is used to instruct to update the gray scale adjustment of each color under m first gray scales degree, the sub-pixels of each color in the first area and the third area in the third sub-panel are controlled to emit light based on each first gray scale.

The third determining module is configured to determine, according to the second adjustment operation for the display panel, when the sub-pixels of each color in the first area and the third area emit light based on each first grayscale, The updated gray level adjustment degree under a gray level, and the updated gray level adjustment degree is related to the degree of difference between the first area and the third area.

Optionally, the first control module is used for:

Control the sub-pixels of each color in the first area and the second area, emit light based on m types of first grayscales under the first digital brightness, and adjust the target parameters corresponding to the sub-pixels also include: under the digital brightness corresponding to the image to be displayed Grayscale adjustment parameter, the grayscale adjustment parameter under the first digital brightness is the default value.

The first adjustment module is used for:

When the digital brightness corresponding to the image to be displayed belongs to the brightness set including the first digital brightness, the gray scale of the adjustment sub-pixel is adjusted.

Optionally, the image compensation device further includes:

The second adjustment module is configured to, when the brightness adjustment mode of the display panel is the direct current DC mode, after determining the gray scale adjustment degree of each color under each first gray scale, based on the gray scale of the test color under the test gray scale The level adjustment degree adjusts the test gray level, wherein the test color is the color of any sub-pixel in the first area and the second area, and the test gray level is any of m first gray levels and n second gray levels. A grayscale.

The fifth control module is used to control the sub-pixels of the test color to emit light based on the adjusted test gray scale under each second digital brightness in the x types of second digital brightness, wherein the brightness set further includes: x types of second digital brightness Digital brightness, x≥1.

The fourth determination module is configured to determine, according to the third adjustment operation for the display panel, when the sub-pixels of the test color emit light at each second digital brightness based on the adjusted test gray scale, under each second digital brightness. Grayscale adjustment.

The fifth determination module is used to determine the grayscale adjustment parameter under each second digital brightness according to the grayscale adjustment degree under each second digital brightness; wherein, the grayscale adjustment parameter under the i-th second digital brightness Pi=Qi*P1/V1, 1≤i≤x, Qi represents the brightness data under the i-th second digital brightness, P1 represents the grayscale adjustment parameter under the first digital brightness, and V1 represents the test color under the test grayscale grayscale adjustment.

Optionally, the image compensation device further includes:

The sixth determination module is configured to determine the grayscale adjustment parameters under y types of third digital brightness according to the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under x types of second digital brightness, and the brightness set also includes: Including: y kinds of third digital brightness.

Optionally, the grayscale adjustment degree includes a first grayscale coefficient, the grayscale adjustment parameter includes a second grayscale coefficient, and the first adjustment module is configured to:

Adjusting the gray scale of the sub-pixel is adjusted as: the gray scale of the sub-pixel, the product of the first gray scale coefficient and the second gray scale coefficient.

The first gray-scale coefficient of the adjustment sub-pixel is: the first gray-scale coefficient of the color of the adjustment sub-pixel under the gray-scale of the adjustment sub-pixel, and the second gray-scale coefficient of the adjustment sub-pixel is: the number corresponding to the image to be displayed The second grayscale coefficient in luminance.

Optionally, the device further includes:

The acquiring module is configured to acquire the white picture to be displayed on the display panel before the sub-pixels of the test color are controlled to emit light based on the adjusted test gray scale under each of the x second digital brightnesses.

The third adjustment module is configured to adjust the gray scale of the adjustment sub-pixels in the white picture according to the target parameters of the adjustment sub-pixels corresponding to the first region in the white picture.

The sixth control module is used to control the display panel to display the adjusted white picture.

The fifth control module is used for:

When the display panel displays a white picture, if the second instruction operation on the display panel is used to instruct image compensation, the sub-pixels of the test color are controlled to be adjusted based on the adjustment of each second digital brightness among the x second digital brightnesses. After the test grayscale glow.

Optionally, the sub-pixels include: TFTs, and the image compensation device further includes:

The seventh control module is used to control any sub-pixel not to emit light if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is greater than the potential difference threshold before the display panel displays the to-be-displayed image.

Optionally, the image compensation device further includes:

The eighth control module is configured to control the display panel to display an adjustment bar graphic for reflecting the gray scale adjustment degree, and any adjustment operation for the display panel is an operation for the adjustment bar graphic.

In a third aspect, an image compensation device is provided, including:

processor;

memory for storing executable instructions for the processor;

Wherein, when the processor executes the executable instructions, any one of the image compensation methods described in the first aspect can be implemented.

In a fourth aspect, a display device is provided, and the display device includes the image compensation device according to the second aspect or the third aspect.

Optionally, the display device includes a display control chip, and the image compensation device is integrated in the display control chip.

In a fifth aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium;

When the instructions are executed on the processing component, the processing component is caused to execute the image compensation method of any one of the first aspect.

The beneficial effects brought by the technical solution provided by this application include:

The image compensation device can control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales, and when the subpixels of each color emit light based on each first grayscale, according to According to the operation of the display panel, the gray scale adjustment degree of each color under the first gray scale is determined, and the gray scale adjustment is performed on the sub-pixels in the image to be displayed based on the gray scale adjustment degree, so that the display effect caused by the aging of the TFT or the aging of the OLED changes. Image compensation can be performed for all the differences, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

Description of drawings

1 is a flowchart of an image compensation method provided by an embodiment of the present application;

FIG. 2 is a schematic interface diagram of a display panel provided by an embodiment of the present application;

FIG. 3 is a schematic interface diagram of another display panel provided by an embodiment of the present application;

4 is a front view of a display panel according to an embodiment of the present application;

FIG. 5 is a schematic interface diagram of still another display panel provided by an embodiment of the present application;

6 is a flowchart of another image compensation method provided by an embodiment of the present application;

FIG. 7 is a schematic interface diagram of another display panel provided by an embodiment of the present application;

FIG. 8 is a front view of a foldable display panel according to an embodiment of the present application;

FIG. 9 is a schematic interface diagram of another display panel provided by an embodiment of the present application;

10 is a block diagram of an image compensation apparatus provided by an embodiment of the present application;

11 is a block diagram of another image compensation apparatus provided by an embodiment of the present application;

FIG. 12 is a block diagram of an image compensation apparatus provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

A current OLED display device includes a display panel and a display control chip, and the display panel includes a plurality of sub-pixels. The display control chip is used for inputting a potential to the sub-pixels to control the light-emitting of the sub-pixels. The display panel has a digital brightness value (DBV), the DBV can be changed, and the overall brightness presented by the display panel when displaying images under different DBVs is different. When the display control chip controls the sub-pixel to emit light, it can first determine the DBV of the current display panel and the gray scale of the sub-pixel (the gray scale is related to the potential input to the sub-pixel), and then according to the DBV and the gray scale of the sub-pixel The electric potential input to the sub-pixel is determined, so as to control the sub-pixel to emit light according to the emission luminance corresponding to the electric potential input to the sub-pixel. From this, it can be known that the light emission luminance of the sub-pixel is related to the DBV of the current display panel and the gray scale of the sub-pixel.

The display control chip can adjust the DBV of the display panel through different dimming modes. The current dimming modes usually include: a pulse width modulation (PWM) dimming mode and a direct current (Direct Current, DC) dimming mode. In the PWM dimming mode, the display control chip controls each sub-pixel (the sub-pixel includes OLED and TFT) to alternate between emitting light and not emitting light, so as to adjust the DBV of the display panel. In the process that each sub-pixel alternates before emitting light and not emitting light, the longer the non-emitting time of each sub-pixel, the smaller the DBV. When the PWM dimming mode is used to adjust the DBV, the potential input to the sub-pixel will not be affected, and correspondingly, the gray scale based on which the sub-pixel emits light will not be affected. In the DC dimming mode, the display control chip adjusts the potential input to the sub-pixels to adjust the DBV of the display panel. When the DC dimming mode is used to adjust the DBV, the potential input to each sub-pixel will be affected, thereby affecting the gray scale on which the sub-pixel emits light.

As the use time of the OLED display panel increases, both the OLED and the TFT will age, thereby affecting the display effect of the OLED display panel. In addition, for a display device with a split-screen display function (such as a foldable display device), due to the difference in the use time of each area of the display panel, the aging degree of the TFT or OLED in each area is different, resulting in Obvious borders affect the display effect. Therefore, it is usually necessary to perform image compensation on the OLED display panel. However, the image compensation device in the related art can only perform image compensation for the aging of the TFT, but cannot perform the image compensation for the aging of the OLED, so the effect of the image compensation is poor.

In the embodiments of the present application, for display devices with different dimming modes, the process of image compensation is different. The embodiments of the present application take the following two implementation manners as examples to describe the process of image compensation.

In a first implementation manner, the dimming mode of the display device is a PWM mode. Please refer to FIG. 1. FIG. 1 is a flowchart of an image compensation method provided by an embodiment of the present application. The method can be applied to an image compensation device in a display device, and the method can include:

Step 101: Control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first gray levels, where m≧1.

Optionally, the display panel may be a foldable display panel, the display panel includes a plurality of sub-panels connected in sequence, the first area belongs to the first sub-panel of the plurality of sub-panels, and the second area belongs to the first sub-panel of the plurality of sub-panels. The second sub-panel to which the panel is connected.

Optionally, for all sub-pixels in the first area and the second area, the image compensation device may control these sub-pixels to emit light based on m types of first grayscales in sequence, and at this time, these sub-pixels are all based on the same first grayscale at the same time. tier glow. Alternatively, the image control and compensation device may control the sub-pixels of a certain color among the sub-pixels to emit light based on m kinds of first gray scales in sequence, and then control the sub-pixels of another color to emit light based on m kinds of first gray scales in sequence, Up to the sub-pixels of each color emit light based on m first grayscales. The image compensation device may also control the sub-pixels of each color in the first area and the second area to emit light based on m types of first grayscales, which is not limited in this embodiment of the present application.

For example, it is assumed that both the first area and the second area include: red sub-pixels, green sub-pixels and blue sub-pixels. And generally, the aging speed of the red sub-pixel and the green sub-pixel is relatively similar, and the aging speed of the blue sub-pixel is much higher than that of the red sub-pixel or the green sub-pixel. Therefore, when performing image compensation, the image compensation device may firstly control the red sub-pixels and green sub-pixels in the first area and the second area to emit light based on each first grayscale at the same time. The light is yellow light formed by mixing the light emitted by the red sub-pixel and the light emitted by the green sub-pixel. The blue sub-pixels in the first region and the second region are then controlled to emit light based on each of the first grayscales in the second stage. Alternatively, when performing image compensation, the image compensation device may first control the red sub-pixels to emit light based on each gray level, then control the green sub-pixels to emit light based on each gray level, and finally control the blue sub-pixels to emit light based on each gray level. It should be noted that the embodiments of the present application only take red sub-pixels, green sub-pixels and blue sub-pixels as examples for description. The order in which each grayscale emits light is not limited.

It should be noted that, in this embodiment of the present application, the first stage is taken as an example before the second stage. Optionally, the first stage may also be located after the second stage, which is not limited in this embodiment of the present application.

Optionally, in this step 101, the image compensation device may control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales at the first digital brightness, and the first A digital brightness may be the highest digital brightness that the display panel can achieve, or it may be a non-highest digital brightness, which is not limited in this embodiment of the present application.

Step 102: When the sub-pixels of each color in the first area and the second area emit light based on each first grayscale, determine that each color is under each first grayscale according to the first adjustment operation for the display panel. grayscale adjustment.

Wherein, the gray-scale adjustment degree is related to the degree of difference between the first area and the second area, and the gray-scale adjustment degree is used to indicate the degree of gray-scale adjustment. Optionally, the greater the difference between the first area and the second area, the smaller the grayscale adjustment; the smaller the difference between the first area and the second area, the greater the grayscale adjustment. For example, the gray scale adjustment may be a gray scale coefficient, and the gray scale coefficient may be embodied in the form of a proportional value.

When the sub-pixels of each color in the first region and the second region emit light based on each first grayscale, the image compensation device can control the display panel to display an adjustment bar graphic for reflecting the grayscale adjustment. The image compensation device may also prompt the user to operate the adjustment bar graph. After that, the user can perform a first adjustment operation on the adjustment bar graph in the display panel through the difference between the first area and the second area observed by human eyes. The first adjustment operation may include: lengthening or shortening the adjustment bar graphic displayed on the display panel, or sliding a finger up or down at any position on the display panel, or the like. The image compensation device can capture the user's first adjustment operation on the display panel, and then determine the gray scale adjustment degree of the current color under the first gray scale according to the first adjustment operation.

FIG. 2 and FIG. 3 are schematic interface diagrams of a display panel according to an embodiment of the application, and in FIGS. 2 and 3 , the display panel not only includes a first area 301 and a second area 302 , but also includes a display panel located in the first area 301 . The third area 303 on the side away from the second area 302 is taken as an example for description. Optionally, the display panel may also not include the third region 303 , which is not limited in this embodiment of the present application. Please refer to FIG. 2 or FIG. 3 , assuming that the image compensation device controls the red sub-pixels and the green sub-pixels in the first area 301 and the second area 302 to emit light based on a first grayscale at the same time, at this time, the display panel can display the interface 30, and at this time, the parts of the interface 30 located in the first area and the second area are displayed as yellow images. For example, the interface 30 further includes an adjustment bar graph 304. FIG. 2 takes the adjustment bar graph 304 simultaneously in the first area 301, the second area 302 and the third area 303 as an example for illustration, and FIG. 3 takes the adjustment bar graph 304 as an example. Taking the third area 303 as an example for illustration, the user can perform the first adjustment operation by lengthening or shortening the adjustment bar graph 304 .

As shown in FIG. 2 or FIG. 3 , the interface 30 further includes an instruction guide box 305 and a “save” button. “Please lengthen or shorten the adjustment bar graph” may be displayed in the instruction guide box 305 to remind the user to perform the first operation on the adjustment bar graph 304 . After the user performs the first operation on the adjustment bar graph 304 through the difference between the first area 301 and the second area 302 observed by the human eye, the user can also click the "Save" button, at this time, the image compensation device determines the current color according to the first adjustment operation. Grayscale adjustment in the first grayscale. It should be noted that the interfaces shown in FIG. 2 and FIG. 3 are only illustrative, and do not limit the interfaces displayed by the display panel.

After the user performs the first adjustment operation on the adjustment bar image 304, the image compensation apparatus determines the gray scale adjustment degree of the current color under the first gray scale through the captured first adjustment operation. For example, the gray-scale adjustment degree is a gray-scale coefficient. It is assumed that when the blue sub-pixels of the first area and the second area emit light based on 255 gray-scale, the user shortens the length of the adjustment bar image to the length of the original adjustment bar graph. 60%, the image compensation apparatus may determine, based on the first adjustment operation, that the gray scale adjustment degree of red at the 255 gray scale is 60%.

For example, it is assumed that in this embodiment of the present application, m types of first grayscales include 8 grayscales, 16 grayscales, 32 grayscales, 64 grayscales, 128 grayscales, and 255 grayscales, and the first region includes red sub-pixels , green sub-pixels and blue sub-pixels, and the gray scale adjustment includes gray scale coefficients. Please refer to Table 1. Table 1 shows the grayscale adjustment of each color at each first grayscale. As shown in Table 1, the grayscale adjustment of red at 64 grayscales is 84%, and green is at 84%. The grayscale adjustment of 128 grayscales is 71%, and the grayscale adjustment of blue at 8 grayscales is 96%.

Table 1

grayscale red green blue 8 88% 67% 96% 16 83% 77% 82% 32 90% 79% 86% 64 84% 74% 91% 128 93% 71% 84% 255 87% 72% 90%

Step 103: Control the first sub-panel and the third sub-panel to display a white picture.

Optionally, the display panel may further include a third sub-panel. For example, please refer to FIG. 4, which is a front view of a display panel according to an embodiment of the present application. The display panel 40 includes a first sub-panel 401, a second sub-panel 402, and a third sub-panel 403. The third sub-panel 403 The sub-panel 403, the first sub-panel 401 and the second sub-panel 402 are connected in sequence. At this time, there may be differences in the aging degrees of the first sub-panel 401 and the third sub-panel 403, resulting in a clear dividing line between the first sub-panel 401 and the third sub-panel 403 when displaying images. Therefore, it is possible to Step 103 is performed, so that the user can observe the difference between the first area and the third area through human eyes, so as to determine whether it is necessary to perform image compensation for the difference between the first sub-panel and the third sub-panel, so as to further improve the image compensation Effect.

For example, the image compensation apparatus may control all sub-pixels located in the first sub-panel and the third sub-panel to emit light, so as to control the first sub-panel and the third sub-panel to display a white picture. Optionally, the image compensation apparatus may control the first sub-panel and the third sub-panel to display a white image at any digital brightness, which is not limited in this embodiment of the present application.

Step 104: When the first sub-panel and the third sub-panel display a white image, determine whether the first instruction operation on the display panel instructs to update the gray scale adjustment of each color under m first gray scales. If the first instruction operation for the display panel is used to instruct to update the grayscale adjustment of each color at the m first grayscales, step 105 is executed, and if the first instruction operation for the display panel is used to instruct not to update each color If the grayscale adjustment degrees of the colors under the m first grayscales are obtained, step 107 is executed.

The first instruction operation may be performed by the user based on whether there is a difference between the first sub-panel and the third sub-panel when a white picture is displayed on the first sub-panel and the third sub-panel, and it may be used to indicate whether to update each The grayscale adjustment of the color in m first grayscales. Optionally, the image compensation device can control the display panel to display a selection prompt box when the sub-pixels of each color in the first area and the third area of the third sub-panel emit light based on each first grayscale, and the user can The first instruction operation is issued according to the content prompted in the selection prompt box. For example, please refer to FIG. 5. FIG. 5 is a schematic diagram of an interface of another display panel provided by an embodiment of the present application. The interface 50 includes a selection box 501, a “Yes” button and a “No” button. The selection box 501 can display There is "Please confirm whether to re-adjust". When the user judges that there is a difference between the first sub-panel and the third sub-panel, he can click the "Yes" button. At this time, the image compensation device captures the first instruction operation and determines the The first instruction operation is used to instruct to update the gray scale adjustment of each color under m first gray scales; when the user judges that there is no difference between the first sub-panel and the third sub-panel, he can click the "No" button , at this time, the image compensation device captures the first instruction operation, and determines that the first instruction operation is used to instruct not to update the gray scale adjustment of each color under m first gray scales.

Step 105: Control the sub-pixels of each color in the first area and the third area in the third sub-panel to emit light based on each first grayscale.

For the process of the image compensation apparatus controlling the sub-pixels of each color in the first area and the third area in the third sub-panel to emit light based on m types of first grayscales, reference may be made to the foregoing step 101, which is not repeated in this embodiment of the present application. .

Step 106: When the sub-pixels of each color in the first area and the third area emit light based on each first grayscale, determine that each color is under each first grayscale according to the second adjustment operation for the display panel. The updated grayscale adjustment of .

The updated grayscale adjustment is related to the difference between the first area and the third area. For the process of this step 105, reference may be made to the process of the foregoing step 102, and details are not described herein in this embodiment of the present application. For example, please refer to Table 2. Table 2 shows the gray scale adjustment degree after updating the gray scale adjustment degree of each color shown in Table 1 under each first gray scale, as shown in Table 2, The grayscale adjustment degree of red at 64 grayscales is 90%, the grayscale adjustment degree of green at 128 grayscales is 73%, and the grayscale adjustment degree of blue at 8 grayscales is 91%.

Table 2

grayscale red green blue 8 93% 81% 91% 16 96% 79% 88% 32 82% 83% 86% 64 90% 86% 93% 128 86% 73% 84% 255 87% 72% 90%

Step 107 , according to the gray scale adjustment degrees of each color under m first gray levels, determine the gray level adjustment degrees of each color under n second gray levels.

Optionally, the image compensation device may perform data analysis on the gray scale adjustment degrees of each color under m first gray levels to determine the gray level adjustment degrees of each color under n second gray levels. For example, the data analysis manner may include: fitting, interpolation or averaging, and the like.

Wherein, all the grayscales on which the sub-pixels in the display panel emit light include: m types of first grayscales and n types of second grayscales. For example, if m types of first grayscales and n types of second grayscales include a total of 256 grayscales ranging from 0 grayscale to 255 grayscales, it is assumed that m types of first grayscales include 8 grayscales, 16 grayscales, 32 grayscales, 64 grayscales, 128 grayscales, and 255 grayscales, the n second grayscales may include: 0 grayscales to 7 grayscales, 9 grayscales to 15 grayscales, and 17 grayscales to 31 grayscales , 33 grayscales to 63 grayscales, 65 grayscales to 127 grayscales, and 129 grayscales to 254 grayscales. For example, please refer to Table 3. Table 3 shows the gray scales under n second gray scales determined after interpolating the gray scale adjustment degrees of each color shown in Table 2 under each first gray scale. Adjustment degree, as shown in Table 3, the grayscale adjustment degree of red at 65 grayscale is 91%, the grayscale adjustment degree of green at 127 grayscale is 72%, and the grayscale adjustment of blue at 9 grayscale Degree is 92%.

table 3

grayscale red green blue 0 90% 90% 90% 1 91% 83% 89% ...... ...... ...... ...... 7 92% 80% 90% 9 94% 82% 92% ...... ...... ...... ...... 15 95% 78% 87% 17 97% 80% 89% ...... ...... ...... ...... 31 83% 82% 85% 33 81% 84% 87% ...... ...... ...... ...... 63 89% 85% 92% 65 91% 87% 94% ...... ...... ...... ...... 127 85% 72% 83% 129 87% 74% 85% ...... ...... ...... ...... 254 86% 71% 89%

Step 108: Adjust the gray scale of the adjustment sub-pixel according to the target parameter of the adjustment sub-pixel corresponding to the first region in the image to be displayed.

The adjustment sub-pixels in the image to be displayed include: sub-pixels with a first gray level and sub-pixels with a second gray level. Generally, the adjustment sub-pixels include all the corresponding sub-pixels of the first region in the image to be displayed. subpixel. The target parameter for adjusting the sub-pixels includes: adjusting the gray-scale adjustment of the color of the sub-pixels under the gray-scale adjustment of the sub-pixels.

Optionally, when the gray-scale adjustment includes a gray-scale coefficient, the image compensation apparatus may adjust the gray-scale of the adjustment sub-pixel as: the product of the gray-scale of the adjustment sub-pixel and the gray-scale coefficient. The gray scale coefficient of the adjustment sub-pixel is: the gray scale coefficient of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel. For example, assuming that the adjustment sub-pixel is a blue sub-pixel, and the gray scale of the adjustment sub-pixel is 7, it can be seen from the foregoing Table 3 that the adjustment sub-pixel has a gray scale adjustment degree of 90%, which is the adjustment sub-pixel. The grayscale coefficient is 90%. The image compensation device can adjust the gray scale of the adjusted sub-pixel to be: 7*90%=6.3≈6.

After adjusting the gray scale of the adjustment sub-pixel of the image to be displayed, the image compensation device can control the display panel to display the to-be-displayed image based on the adjusted gray scale, and at this time, the adjustment sub-pixel emits light based on the luminous brightness corresponding to the adjusted gray scale , the difference between the first area and the second area, and/or the first area and the third area is reduced, thereby improving the uniformity of light emission of the sub-pixels in the image to be displayed.

It should be noted that, in the first implementation manner, steps 101 to 107 are all performed before the display panel displays the to-be-displayed image, and in step 107, the gray level of each color in the n second gray scales is determined. After the level adjustment, before controlling the display panel to display any image to be displayed, the image compensation device adjusts the gray level of the sub-pixels in the to-be-displayed image based on the gray level adjustment of each color under the n second gray levels. Adjust, and then control the display panel to display the image to be displayed based on the adjusted gray scale.

In the second implementation manner, the dimming mode of the display device is the DC mode. Please refer to FIG. 6. FIG. 6 is a flowchart of another image compensation method provided by an embodiment of the present application. The method can be applied to an image compensation device in a display device, and the method can include:

Step 601 : Control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales at a first digital brightness, where m≧1.

For example, the image compensation apparatus may store a luminance set to which the first digital luminance belongs. Optionally, the first digital brightness may be the highest digital brightness that the display panel can achieve. For the process of this step 601, reference may be made to the step 101 in the foregoing first implementation manner, which is not repeated in this embodiment of the present application.

Step 602: When the sub-pixels of each color in the first area and the second area emit light of each first grayscale at the first digital brightness, determine that each color is Grayscale adjustment in each first grayscale.

Step 603: Control the first sub-panel and the third sub-panel to display a white picture.

Step 604: When the first sub-panel and the third sub-panel display a white picture, determine whether the first instruction operation on the display panel instructs to update the gray scale adjustment of each color under m first gray scales. If the first instruction operation for the display panel is used to instruct to update the gray scale adjustment levels of each color at the m first gray scales, step 605 is executed, and if the first instruction operation for the display panel is used to instruct not to update each color If the grayscale adjustment degrees of the colors under the m first grayscales are obtained, step 607 is executed.

Step 605: Control the sub-pixels of each color in the first area and the third area in the third sub-panel to emit light based on m types of first grayscales.

Step 606: When the sub-pixels of each color in the first area and the third area emit light based on each first grayscale, according to the second adjustment operation for the display panel, determine that each color is under each first grayscale The updated grayscale adjustment of .

The updated grayscale adjustment is related to the difference between the first area and the third area.

Step 607 , according to the grayscale adjustment degrees of each color at the m first grayscales, determine the grayscale adjustment degrees of each color at n second grayscales.

For the foregoing steps 602 to 607 , reference may be made to steps 102 to 107 in the foregoing first implementation manner, which is not repeated in this embodiment of the present application.

Step 608: Acquire a white picture to be displayed on the display panel.

Step 609: Adjust the gray scale of the adjustment sub-pixels in the white picture according to the target parameters of the adjustment sub-pixels corresponding to the first region in the white picture.

The target parameter for adjusting the sub-pixels includes: adjusting the gray-scale adjustment of the color of the sub-pixels under the gray-scale adjustment of the sub-pixels. Optionally, when the gray scale adjustment degree under the gray scale of the adjustment sub-pixel includes a gray scale coefficient, the image compensation device may adjust the gray scale of the adjustment sub-pixel as: the product of the gray scale of the adjustment sub-pixel and the gray scale coefficient. . The gray scale coefficient of the adjustment sub-pixel is: the gray scale coefficient of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel. For the process of this step 609, reference may be made to the foregoing step 108, which is not repeated in this embodiment of the present application.

Step 610: Control the display panel to display the adjusted white picture.

Since in the aforementioned steps 601 to 607, when the sub-pixels of each color in the first area and the second area emit light based on m first grayscales at the first digital brightness, the first adjustment operation is performed by the user through the human eye. The observed difference between the first region and the second region is performed. In the DC dimming mode, the degree of difference between the first area and the second area may be different under different digital brightness. Therefore, the image compensation device can control the display panel to display the adjusted white image, so that the user can judge whether Perform image compensation.

Step 611 , when the display panel displays a white image, determine whether the second instruction operation on the display panel instructs to perform image compensation. If the second instruction operation for the display panel is used to instruct image compensation to be performed, step 612 is performed, and if the second instruction operation to the display panel is used to instruct not to perform image compensation, step 617 is performed.

The second indication operation may be performed by the user based on whether there is a difference between the first area and the second area, and/or the first area and the third area of the display panel, and may be used to indicate whether to continue pixel compensation. Optionally, when the display panel displays a white picture, the image compensation apparatus can control the display panel to display a selection prompt box, and the user can issue a second instruction operation according to the content prompted in the selection prompt box. For example, please refer to FIG. 7. FIG. 7 is a schematic interface diagram of another display panel provided by an embodiment of the present application. The interface 70 includes a selection box 701, a “Yes” button, and a “No” button. The selection box 701 can display There is "Please confirm whether to perform image compensation". When the user judges that there is a difference between the first area and the second area of the display panel, and/or the first area and the third area, you can click the "Yes" button. At this time, the image The compensation device captures the second instruction operation and determines that the second instruction operation is used to instruct image compensation; when the user determines that the first area and the second area of the display panel and/or the first area and the third area are not When there is a difference, the "No" button may be clicked, and the image compensation device captures the second instruction operation at this time, and determines that the second instruction operation is used to instruct not to perform image compensation.

Step 612: Adjust the test gray scale based on the gray scale adjustment degree of the test color under the test gray scale.

Wherein, the test color is the color of any sub-pixel in the first area and the second area, and the test grayscale is any one of m first grayscales and n second grayscales. Optionally, when the gray scale adjustment includes a gray scale coefficient, the image compensation apparatus may adjust the test gray scale to be: the product of the test gray scale and the gray scale coefficient. For example, assuming that the test color is blue and the test gray scale is 7, it can be known from the foregoing Table 3 that the gray scale adjustment of the test color at the test gray scale is 90%. Then, the image compensation device can adjust the gray scale of the sub-pixels of the test color in the first area and the second area to 6.

Step 613: Control the sub-pixels of the test color to emit light based on the adjusted test gray scale under each of the x second digital luminances.

At this time, the brightness set further includes: x kinds of second digital brightness, where x≥1. For example, assuming that the test color is blue and the test gray scale is 7, it can be known from the foregoing step 612 that the adjusted test gray scale is 6. The image compensation device may control the sub-pixels of the test color in the first area and the second area to emit light based on grayscale 6 at each of the x second digital luminances.

It should be noted that, since the sub-pixels of the test color are controlled to emit light based on the adjusted test gray scale under each second digital brightness of the x second digital brightness, it is avoided that the sub-pixels of the test color are at x. When emitting light under each of the second digital brightness, the gray scale affects the lighting effect, thereby improving the accuracy of image compensation.

Step 614: When the sub-pixels of the test color emit light based on the adjusted test gray scale under each second digital brightness, determine the gray scale adjustment degree under each second digital brightness according to the third adjustment operation for the display panel. .

Wherein, the gray scale adjustment degree under each second digital brightness is related to the degree of difference between the first area and the second area, and the gray scale adjustment degree is used to indicate the degree of gray scale adjustment. Optionally, the greater the difference between the first area and the second area, the smaller the grayscale adjustment; the smaller the difference between the first area and the second area, the greater the grayscale adjustment. For the process of step 614, reference may be made to step 102 in the foregoing first implementation manner, which is not repeated in this embodiment of the present application.

For example, in the embodiment of the present application, the digital brightness is represented by a proportional value corresponding to the digital brightness, and the proportional value of the digital brightness is: the ratio of the digital brightness to the highest digital brightness that the display panel can achieve. Assuming that in the embodiment of the present application, the ratio values corresponding to the x types of second digital brightness include: 20% (percent), 50%, and 80%, please refer to Table 4, which shows each second digital brightness As shown in Table 4, when the second digital brightness is 20%, the grayscale adjustment is 80%.

Table 4

The scale value corresponding to the digital brightness Grayscale adjustment 20% 80% 50% 40% 80% 45%

Step 615: Determine the grayscale adjustment parameters under each second digital brightness according to the grayscale adjustment degree under each second digital brightness.

Among them, the grayscale adjustment parameter Pi=Qi*P1/V1 under the i-th second digital brightness, 1≤i≤x, Qi represents the brightness data under the i-th second digital brightness, and P1 represents the first digital brightness. The grayscale adjustment parameter of , V1 represents the grayscale adjustment of the test color under the test grayscale. It should be noted that the luminance data (Qi) under the second digital brightness may be the grayscale adjustment degree under the second digital brightness, and the grayscale adjustment parameter (P1) under the first digital brightness may be a default value, for example, P1 Can be 0.9. For example, assuming that the proportional value corresponding to the second digital brightness is 50%, it can be seen from the foregoing Table 4 that the gray scale adjustment degree under the second digital brightness is 40% (Qi=40%), and P1=0.9. Assuming that the test grayscale is 17 and the test color is green, it can be seen from the foregoing Table 3 that the grayscale adjustment of the test color under the test grayscale is 80% (V1=80%), then Qi=40%, P1= Substituting 0.9 and V1=80% into Pi=Qi*P1/V1 yields Pi=45%. For the determination process of the gray-scale adjustment parameters under the other second digital brightness, reference may be made to the determination process of the gray-scale adjustment parameters under the second digital brightness of 50%, which is not repeated in this embodiment of the present application.

For example, please refer to Table 5. Table 5 shows the grayscale adjustment parameters under each second digital brightness shown in Table 4. As shown in Table 5, when the second digital brightness is 20%, the grayscale adjustment The parameter is 83%.

table 5

The scale value corresponding to the digital brightness Grayscale adjustment parameters 20% 83% 50% 45% 80% 50%

Step 616 , according to the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under x second digital brightnesses, determine the grayscale adjustment parameters under y types of third digital brightness.

At this time, the brightness set further includes: y kinds of third digital brightness. Optionally, the image compensation device may perform data analysis on the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under x kinds of second digital brightness to determine the grayscale adjustment under y kinds of third digital brightness. parameter. For example, the data analysis manner may include: fitting, interpolation or averaging, and the like. For example, it is assumed that the proportional value corresponding to the digital brightness that can be adjusted by the display panel includes 0% to 100%, assuming that the proportional value corresponding to the first digital brightness is 100%, and the proportional value corresponding to the second digital brightness includes: 20%, 50% and 80%, the proportional values corresponding to the y types of third digital brightness may include: 0%-19%, 21%-49%, 51%-79%, and 81%-99%. Illustratively, please refer to Table 6. Table 6 shows the grayscale adjustment parameters under y third digital brightnesses determined after interpolating the grayscale adjustment parameters under each second digital brightness shown in Table 5, such as: As shown in Table 6, when the proportional value corresponding to the digital brightness is 19%, the gray scale adjustment parameter is 82%.

Table 6

The scale value corresponding to the digital brightness Grayscale adjustment parameters 0% 90% 1% 84% ...... ...... 19% 82% twenty one% 84% ...... ...... 49% 44% 51% 46% ...... ...... 79% 49% 81% 51% ...... ...... 99% 89%

Step 617: Adjust the gray scale of the adjustment sub-pixel according to the target parameter of the adjustment sub-pixel corresponding to the first region in the image to be displayed.

The target parameters for adjusting the sub-pixels in the image to be displayed include: the gray-scale adjustment degree of the color of the sub-pixels under the gray-scale adjustment of the sub-pixels, and the gray-scale adjustment parameters under the digital brightness corresponding to the image to be displayed. The process of adjusting the gray level of the adjustment sub-pixel may include: when the digital brightness corresponding to the image to be displayed belongs to a brightness set including the first digital brightness, adjusting the gray level of the adjustment sub-pixel. Typically, the brightness set includes all the digital brightness of the display panel.

Optionally, the gray scale adjustment includes a first gray scale coefficient, the gray scale adjustment parameter includes a second gray scale coefficient, and the image compensation device may adjust the gray scale of the adjustment sub-pixels as: the gray scale of the adjustment sub-pixel, the first gray scale The product of the order coefficient and the second gray scale coefficient. The first gray-scale coefficient of the adjustment sub-pixel is: the first gray-scale coefficient of the color of the adjustment sub-pixel under the gray-scale of the adjustment sub-pixel, and the second gray-scale coefficient of the adjustment sub-pixel is: the number corresponding to the image to be displayed The second grayscale coefficient in luminance. For example, it is assumed that the proportional value corresponding to the digital brightness corresponding to the image to be displayed is 81%, the adjustment sub-pixel is a blue sub-pixel, and the gray scale of the adjustment sub-pixel is 7. It can be seen from the foregoing Table 3 that the adjustment sub-pixel has a The gray scale adjustment degree is 90%, that is, the first gray scale coefficient of the adjustment sub-pixel is 90%. It can be known from the foregoing Table 6 that the gray scale adjustment parameter corresponding to the digital brightness corresponding to the image to be displayed is 51%, that is, the second gray scale coefficient of the adjustment sub-pixel is 51%. The image compensation device can adjust the gray scale of the adjusted sub-pixel to be: 7*90%*51%=3.213≈3.

After adjusting the gray scale of the adjustment sub-pixels of the image to be displayed, the image compensation device can control the display panel to display the to-be-displayed image based on the adjusted gray scale. At this time, the first region corresponds to the adjustment sub-pixels in the to-be-displayed image. Based on the light emission brightness corresponding to the adjusted gray scale, the difference between the first area and the second area, and/or the first area and the third area is reduced, thereby improving the uniformity of light emission of sub-pixels in the image to be displayed .

It should be noted that, in this second implementation manner, steps 601 to 616 are all performed before the display panel displays the to-be-displayed image, and in step 607, the gray level of each color in the n second gray scales is determined. gradation adjustment degree, and after determining the grayscale adjustment parameters under the y third digital brightness in step 616, before controlling the display panel to display any to-be-displayed image, the image compensating device performs the adjustment based on each color in the n second gradation adjustment parameters. The gray scale adjustment degree under the gray scale and the gray scale adjustment parameters under each system brightness are adjusted to the gray scale of the adjustment sub-pixels in the image to be displayed, and then the display panel is controlled to display the to-be-displayed image based on the adjusted gray scale.

Optionally, for a foldable display panel, if the foldable display panel further includes a third sub-panel, the image compensation image may be controlled based on m types of first and second sub-pixels of each color in the first area and the second area of the display panel. When the gray scale emits light, the sub-pixels in the target area in the display panel are controlled to not emit light at the same time. The first sub-panel includes: a connection area and a first area sequentially arranged along the direction of the third sub-panel toward the second sub-panel, and the target area includes: the connection area, and a third sub-panel close to the first sub-panel. area. For example, please refer to FIG. 8 , which is a front view of a folded display panel 40 according to an embodiment of the present application. The display panel 40 includes a third sub-panel 403 , a first sub-panel 401 and a second sub-panel 403 connected in sequence. panel 402. The first sub-panel 401 includes a connection area A1 and a first area B arranged in sequence along the direction of the third sub-panel 403 toward the second sub-panel 402 , and the target area A may include the connection area A1, and the third sub-panel 403 Area A2 close to the first sub-panel 401 . Then, when the image compensation device controls the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m types of first grayscales, it simultaneously controls the target area A to display black. In this way, when the user observes the difference between the first area and the second area before the user's eyes, the influence of the target area A on the user's observation result can be avoided, thereby improving the accuracy of image compensation.

It should be noted that, when the image compensation device controls the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m types of first grayscales, the image compensation device can also be controlled to be located in the third area of the third sub-panel. The sub-pixels of each color emit light based on m first grayscales. Alternatively, the sub-pixels of all colors located in the third area of the third sub-panel can be controlled to emit light at the same time. The embodiments of the present application do not limit the light-emitting conditions of the sub-pixels located in the third sub-panel, wherein the third area is the first Areas other than the target area in the three subpanels.

Alternatively, in the embodiment of the present application, before the display panel displays the image to be displayed, if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is greater than the potential difference threshold, control any sub-pixel. Pixels do not emit light. Because when the difference between the input potential and the output potential of the TFT of any sub-pixel is greater than the potential difference threshold, if any sub-pixel emits light, it will affect the human eye's judgment of the difference between the regions. Therefore, control the any sub-pixel The pixels do not emit light, which improves the accuracy of image compensation when the user issues an adjustment operation based on differences between regions. For example, please refer to FIG. 9. FIG. 9 is a schematic diagram of the interface 30 shown in FIG. 2, after the sub-pixel whose difference between the input potential and the output potential of the control TFT is greater than the potential difference threshold does not emit light, the input potential and output of all TFTs The sub-pixels whose potential difference is greater than the potential difference threshold constitute a severe voltage drop (IRDrop) region C, which is displayed in black.

In the embodiment of the present application, since the image compensation device determines the target parameter according to the adjustment operation, and the adjustment operation is performed by the difference between the regions observed by the user through the human eye, the user can be guided to perform adjustment based on the observation result of the human eye. operation, so that the image compensation device can quickly perform image compensation, so that the image compensation effect can meet the needs of different users, and the user experience is improved. Therefore, the image compensation device can realize fast and accurate image compensation without the need to detect the degree of aging, measure the luminous brightness of each sub-pixel through an optical instrument, and establish an aging model.

It should be noted that the above two implementations can be combined based on specific scenarios. For example, if the dimming mode of a certain display device includes both the PWM dimming mode and the DC dimming mode, the image compensation device is performing image compensation. Before, the dimming mode can be detected first. When it is detected that the dimming mode is the PWM dimming mode, the image compensation device can execute the method corresponding to the first implementation. When it is detected that the dimming mode is the DC dimming mode, the image compensation The compensation device may execute the method corresponding to the second implementation manner.

To sum up, with the image compensation method provided in the embodiments of the present application, the image compensation device can control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m types of first grayscales, and emit light in each When the sub-pixels of the colors emit light based on each first gray scale, the gray scale adjustment degree of each color in the first gray scale is determined according to the operation on the display panel, and the gray scale adjustment degree of the subpixels in the to-be-displayed image is performed based on the gray scale adjustment degree. The adjustment enables image compensation to be performed for the deterioration of the display effect caused by TFT aging or OLED aging, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

It should be noted that, in the related art, the image compensation device used for image compensation is usually an image compensation circuit independent from the display control chip in the display device, and its volume is large, so it cannot be applied to a display device with a small volume. However, the image compensation device provided in the embodiment of the present application can be integrated in the display control chip of the display device, and the image compensation device does not increase the volume of the display device, so the image compensation device can be applied to a display device with a small volume, and is widely used .

The image compensation method of the embodiment of the present application has been described above, and the image compensation device of the embodiment of the present application is described below.

FIG. 10 is a block diagram of an image compensation apparatus provided by an embodiment of the present application. As shown in FIG. 10 , the image compensation apparatus 500 includes:

The first control module 501 is configured to control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first gray levels, where m≧1.

The first determination module 502 is configured to determine, according to the first adjustment operation for the display panel, when the sub-pixels of each color in the first area and the second area emit light based on each first grayscale, The gray level adjustment degree under the first gray level, and the gray level adjustment degree is related to the difference between the first area and the second area.

The first adjustment module 503 is configured to adjust the gray scale of the adjustment sub-pixels according to the target parameters of the adjustment sub-pixels corresponding to the first region in the to-be-displayed image.

The adjustment sub-pixels in the image to be displayed include: sub-pixels having a first gray scale, and the target parameters for adjusting the sub-pixels include: adjusting the gray-scale adjustment of the color of the sub-pixels under the gray-scale adjustment of the sub-pixels.

To sum up, in the image compensation device provided by the embodiments of the present application, the control module controls the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales, and emit light in each color When the sub-pixels emit light based on each first gray scale, the first determination module determines the gray scale adjustment degree of each color under the first gray scale according to the operation on the display panel, and the adjustment module is based on the gray scale adjustment degree. The gray scale adjustment of the sub-pixels enables image compensation to be performed for the deterioration of the display effect caused by TFT aging or OLED aging, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

Optionally, FIG. 11 is a block diagram of another image compensation apparatus 500 provided by an embodiment of the present invention. Please refer to FIG. 11 . On the basis of FIG. 10 , the apparatus 500 further includes:

The second determining module 504 is configured to determine, according to the grayscale adjustment degrees of each color at m first grayscales, the grayscale adjustment degrees of each color at n second grayscales, and the adjustment in the image to be displayed. The sub-pixel further includes: a sub-pixel having a second gray scale.

Optionally, both the first area and the second area include: red sub-pixels, green sub-pixels and blue sub-pixels, and the first control module 501 is used for:

In the first stage, the red sub-pixels and the green sub-pixels in the first and second regions are controlled to emit light simultaneously based on each first grayscale.

In the second stage, the blue sub-pixels in the first area and the second area are controlled to emit light based on each first gray scale.

Optionally, the gray scale adjustment includes a gray scale coefficient, and the first adjustment module 503 is configured to:

When the brightness adjustment mode of the display panel is the PWM mode, the adjustment of the gray scale of the adjustment sub-pixel is: the product of the gray scale of the adjustment sub-pixel and the gray scale coefficient.

The adjustment of the gray scale coefficient of the sub-pixel is: the gray scale coefficient of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel.

Optionally, the display panel is a folding display panel. Optionally, the display panel includes a plurality of sub-panels connected in sequence, the first area belongs to a first sub-panel of the plurality of sub-panels, and the second area belongs to a second sub-panel of the plurality of sub-panels connected to the first sub-panel.

Optionally, please refer to FIG. 11. On the basis of FIG. 10, the image compensation apparatus 500 further includes:

The second control module 505 is configured to control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on each of the m first gray-scales, if a plurality of sub-panels emit light If the third sub-panel is included, the sub-pixels in the target area in the display panel are controlled not to emit light.

The third sub-panel, the first sub-panel and the second sub-panel are connected in sequence, and the first sub-panel includes: a connection area and a first area arranged in sequence along the direction of the third sub-panel toward the second sub-panel, the target area Including: the connection area, and the area of the third sub-panel close to the first sub-panel.

Optionally, please refer to FIG. 11. On the basis of FIG. 10, the image compensation apparatus further includes:

The third control module 506 is configured to control the first sub-panel and the third sub-panel to display a white picture after determining the gray scale adjustment of each color under each first gray scale.

The fourth control module 507 is used to instruct to update the gray scale of each color under m first gray scales if the second instruction operation for the display panel is used when the first sub-panel and the third sub-panel display a white picture. If the adjustment degree is set, the sub-pixels of each color in the first area and the third area in the third sub-panel are controlled to emit light based on each first gray scale.

The third determination module 508 is configured to determine, according to the third adjustment operation on the display panel, when the sub-pixels of each color in the first area and the third area emit light based on each first gray scale, The updated grayscale adjustment degree under the first grayscale, and the updated grayscale adjustment degree is related to the degree of difference between the first area and the third area.

Optionally, the first control module 501 is used for:

Control the sub-pixels of each color in the first area and the second area, emit light based on m types of first grayscales under the first digital brightness, and adjust the target parameters corresponding to the sub-pixels also include: under the digital brightness corresponding to the image to be displayed Grayscale adjustment parameter, the grayscale adjustment parameter under the first digital brightness is the default value.

Correspondingly, the first adjustment module 503 is used for:

When the digital brightness corresponding to the image to be displayed belongs to the brightness set including the first digital brightness, the gray scale of the adjustment sub-pixel is adjusted.

Optionally, please refer to FIG. 11. On the basis of FIG. 10, the image compensation apparatus 500 further includes:

The second adjustment module 509 is configured to, when the brightness adjustment mode of the display panel is the direct current DC mode, after determining the gray scale adjustment degree of each color under each first gray scale, based on the test color under the test gray scale The gray scale adjustment degree adjusts the test gray scale, wherein the test color is the color of any sub-pixel in the first area and the second area, and the test gray scale is one of the m first gray scales and the n second gray scales. any grayscale.

The fifth control module 510 is used to control the sub-pixels of the test color to emit light based on the adjusted test gray scale under each second digital brightness of the x types of second digital brightness, wherein the brightness set further includes: Two-digit brightness, x≥1.

The fourth determination module 511 is configured to determine, according to the second adjustment operation for the display panel, under each second digital brightness when the sub-pixels of the test color emit light based on the adjusted test gray scale at each second digital brightness. grayscale adjustment.

The fifth determination module 512 is configured to determine the grayscale adjustment parameter under each second digital brightness according to the grayscale adjustment degree under each second digital brightness; wherein, the grayscale adjustment under the i-th second digital brightness The parameter Pi=Qi*P1/V1, 1≤i≤x, Qi represents the brightness data under the i-th second digital brightness, P1 represents the grayscale adjustment parameter under the first digital brightness, and V1 represents the test color in the test grayscale lower grayscale adjustment.

Optionally, please refer to FIG. 11. On the basis of FIG. 10, the image compensation apparatus 500 further includes:

The sixth determination module 513 is configured to determine, according to the grayscale adjustment parameters under the first digital brightness and the grayscale adjustment parameters under x types of second digital brightnesses, the grayscale adjustment parameters under y types of third digital brightness, the brightness set Also includes: y third digital brightness.

Optionally, the grayscale adjustment degree includes a first grayscale coefficient, the grayscale adjustment parameter includes a second grayscale coefficient, and the first adjustment module 503 is configured to:

Adjusting the gray scale of the sub-pixel is adjusted as: the gray scale of the sub-pixel, the product of the first gray scale coefficient and the second gray scale coefficient.

The first gray-scale coefficient of the adjustment sub-pixel is: the first gray-scale coefficient of the color of the adjustment sub-pixel under the gray-scale of the adjustment sub-pixel, and the second gray-scale coefficient of the adjustment sub-pixel is: the number corresponding to the image to be displayed The second grayscale coefficient in luminance.

Optionally, please refer to FIG. 11 , on the basis of FIG. 10 , the apparatus 500 further includes:

The obtaining module 514 is configured to obtain the white picture to be displayed on the display panel before the sub-pixels of the test color are controlled to emit light based on the adjusted test gray scale under each of the x second digital luminances.

The third adjustment module 515 is configured to adjust the gray scale of the adjustment sub-pixels in the white picture according to the target parameters of the adjustment sub-pixels corresponding to the first region in the white picture.

The sixth control module 516 is configured to control the display panel to display the adjusted white picture.

The fifth control module 510 is used for:

When the display panel displays a white picture, if the first instruction operation on the display panel is used to instruct image compensation, the sub-pixels of the test color are controlled under each of the x second digital brightnesses, based on the adjustment After the test grayscale glow.

Optionally, the sub-pixels include: TFTs, please refer to FIG. 11 , on the basis of FIG. 10 , the image compensation apparatus 500 further includes:

The seventh control module 517 is configured to control any sub-pixel not to emit light if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is greater than the potential difference threshold before the display panel displays the image to be displayed.

Optionally, please refer to FIG. 11. On the basis of FIG. 10, the image compensation apparatus 500 further includes:

The eighth control module 518 is configured to control the display panel to display an adjustment bar graph for reflecting the gray scale adjustment degree, and any adjustment operation on the display panel is an operation on the adjustment bar graph.

To sum up, in the image compensation device provided by the embodiments of the present application, the control module controls the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales, and emit light in each color When the sub-pixels emit light based on each first gray scale, the first determination module determines the gray scale adjustment degree of each color under the first gray scale according to the operation on the display panel, and the adjustment module is based on the gray scale adjustment degree. The gray scale adjustment of the sub-pixels enables image compensation to be performed for the deterioration of the display effect caused by TFT aging or OLED aging, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

An embodiment of the present application provides a display device, and the display device includes the image compensation device described in any of the foregoing embodiments. For example, the display device includes the display device described in FIG. 10 , FIG. 11 , or FIG. 12 .

Optionally, the display device includes a display control chip, and the image compensation device can be integrated in the display control chip. Compared with the image compensation device in the related art, it has a smaller volume and can be applied to a display device with a smaller volume, and has a wide range of applications.

To sum up, in the display device provided by the embodiment of the present application, the image compensation device can control the sub-pixels of each color in the first area and the second area of the display panel to emit light based on m first grayscales, and in each color When the sub-pixels of the colors emit light based on each first gray scale, the gray scale adjustment degree of each color in the first gray scale is determined according to the operation on the display panel, and the gray scale adjustment degree of the subpixels in the to-be-displayed image is performed based on the gray scale adjustment degree. The adjustment enables image compensation to be performed for the deterioration of the display effect caused by TFT aging or OLED aging, thereby improving the image compensation effect and further enriching the functions of the image compensation device.

It should be noted that, in the embodiments of the present application, each module of the image compensation apparatus may be implemented in a form of hardware, a form of software, or a form of hardware plus software. This embodiment of the present application does not limit this. When each module of the image compensation apparatus is implemented in the form of software, please refer to FIG. 12 . FIG. 12 is a block diagram of an image compensation apparatus provided by an embodiment of the present application. The image compensation apparatus 600 includes: a memory 601 and a processor 602 and a computer program stored on the memory 601 and capable of running on the processor 602. When the processor 602 executes the computer program, the image compensation method described in the method side embodiments of the present application is implemented.

Optionally, the apparatus 600 further includes a communication bus 603 and a communication interface 604 .

The processor 602 includes one or more processing cores, and the processor 602 executes various functional applications and data processing by running computer programs and units.

The memory 601 may be used to store computer programs and units. Specifically, the memory can store an operating system and an application program unit required for at least one function. The operating system may be an operating system such as a real-time operating system (Real Time eXecutive, RTX), LINUX, UNIX, WINDOWS, or OSX.

There may be multiple communication interfaces 604, and the communication interfaces 604 are used to communicate with other storage devices or network devices.

The memory 601 and the communication interface 604 are respectively connected to the processor 602 through the communication bus 603 .

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer program instructions, when loaded and executed on a computer, result in whole or in part of the processes or functions described herein. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, or digital subscriber line) or wireless (eg, infrared, wireless, or microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk), among others.

In this application, the terms "first" and "second" are used for descriptive purposes only, and should not be construed to indicate or imply relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. The term "and/or" is only an association relationship to describe related objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. three conditions. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be noted that, the method embodiments and apparatus embodiments provided in the embodiments of the present application may refer to each other, which is not limited in the embodiments of the present application. The sequence of the steps of the method embodiments provided in the embodiments of the present application can be appropriately adjusted, and the steps can also be increased or decreased according to the situation. All methods should be covered within the protection scope of the present application, and therefore will not be repeated here.

It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (26)

1. An image compensation method applied to an image compensation device, the method comprising:

controlling each color sub-pixel in a first area and a second area of the display panel to emit light based on each first gray scale in m first gray scales, wherein m is more than or equal to 1;

determining a gray scale adjustment degree of each color at each first gray scale according to a first adjustment operation performed by a user on the display panel when the sub-pixel of each color in the first area and the second area emits light based on each first gray scale at a first digital brightness, wherein the gray scale adjustment degree is related to the difference degree of the first area and the second area;

determining the gray scale adjustment degree of each color under n second gray scales according to the gray scale adjustment degree of each color under the m first gray scales;

when the brightness adjusting mode of the display panel is a direct current DC mode, adjusting the test gray scale based on the gray scale adjustment degree of the test color under the test gray scale; wherein the test color is the color of any sub-pixel in the first region and the second region, and the test gray scale is any one of the m first gray scales and the n second gray scales;

controlling the sub-pixel of the test color to emit light based on the adjusted test gray scale under each second digital brightness of the x second digital brightnesses, and determining the gray scale adjustment degree under each second digital brightness according to a third adjustment operation aiming at the display panel, wherein x is more than or equal to 1;

determining a gray scale adjusting parameter under each second digital brightness according to the gray scale adjusting degree under each second digital brightness; the gray scale adjusting parameter Pi = Qi × P1/V1 under the ith second digital brightness, i is more than or equal to 1 and less than or equal to x, Qi represents the brightness data under the ith second digital brightness, P1 represents the gray scale adjusting parameter under the first digital brightness, and V1 represents the gray scale adjusting degree of the test color under the test gray scale;

adjusting the gray scale of the adjusting sub-pixel according to the target parameter of the adjusting sub-pixel corresponding to the first area in the image to be displayed; wherein the adjusting sub-pixels in the image to be displayed comprise: the sub-pixels with the first gray scale and the sub-pixels with the second gray scale, the adjusting the target parameters of the sub-pixels comprises: and the gray scale adjustment degree of the color of the adjustment sub-pixel under the gray scale of the adjustment sub-pixel and the gray scale adjustment parameter under the digital brightness corresponding to the image to be displayed.

2. The method of claim 1, wherein the first region and the second region each comprise: red, green and blue sub-pixels, the sub-pixel controlling each color in the first and second regions of the display panel emitting light based on each of m first gray scales, comprising:

in a first stage, controlling the red sub-pixel and the green sub-pixel in the first region and the second region to emit light based on each first gray scale simultaneously;

in a second stage, the blue sub-pixels in the first and second regions are controlled to emit light based on each of the first gray scales.

3. The method of claim 2, wherein the first region and the second region each comprise: red, green and blue sub-pixels, the sub-pixel controlling each color in the first and second regions of the display panel emitting light based on each of m first gray scales, comprising:

in a first stage, controlling the red sub-pixel and the green sub-pixel in the first region and the second region to emit light based on each first gray scale simultaneously;

in a second stage, the blue sub-pixels in the first and second regions are controlled to emit light based on each of the first gray scales.

4. A method according to any of claims 1 to 3, wherein the display panel is a folded display panel.

5. The method of claim 4, wherein the display panel comprises a plurality of sub-panels connected in sequence, wherein the first region belongs to a first sub-panel of the plurality of sub-panels, and wherein the second region belongs to a second sub-panel of the plurality of sub-panels connected to the first sub-panel.

6. The method of claim 5, further comprising:

when the sub-pixels of each color in the first area and the second area of the display panel are controlled to emit light based on each first gray scale in the m first gray scales, if the plurality of sub-panels comprise a third sub-panel, the sub-pixels in the target area in the display panel are controlled not to emit light;

wherein, the third sub-panel, the first sub-panel and the second sub-panel are connected in sequence, and the first sub-panel comprises: the connection area and the first area are sequentially arranged along the direction of the third sub-panel towards the second sub-panel, and the target area comprises: the connection area, and an area of the third sub-panel that is adjacent to the first sub-panel.

7. The method of claim 6, wherein after determining the degree of gray scale adjustment for each color at each of the first gray scales, the method further comprises:

controlling the first sub-panel and the third sub-panel to display a white picture;

when the first sub-panel and the third sub-panel display the white picture, if a first indication operation for the display panel is used for indicating to update the gray scale adjustment degree of each color under the m first gray scales, controlling the sub-pixels of each color in a third area in the first area and the third sub-panel to emit light based on each first gray scale;

when the sub-pixel of each color in the first region and the third region emits light based on each first gray scale, determining an updated gray scale adjustment degree of each color at each first gray scale according to a second adjustment operation for the display panel, the updated gray scale adjustment degree being related to a difference degree of the first region and the third region.

8. The method of claim 1, wherein the gray scale adjustment parameter at the first digital brightness is a default value;

adjusting the gray scale of the adjusting sub-pixel, comprising:

when the digital brightness corresponding to the image to be displayed belongs to the brightness set, adjusting the gray scale of the adjusting sub-pixel; the set of luminances includes the first digital luminance and the x second digital luminances.

9. The method of claim 8, further comprising:

determining y gray scale adjustment parameters under third digital brightness according to the gray scale adjustment parameters under the first digital brightness and the gray scale adjustment parameters under the x second digital brightness, wherein the brightness set further comprises: the y third digital luminances.

10. The method according to claim 1 or 9, wherein the gray scale adjustment degree comprises a first gray scale coefficient, the gray scale adjustment parameter comprises a second gray scale coefficient, and the adjusting the gray scale of the adjusting sub-pixel according to the target parameter of the corresponding adjusting sub-pixel in the image to be displayed of the first region comprises:

adjusting the gray scale of the adjusting sub-pixel as follows: adjusting the product of the gray scale of the sub-pixel, the first gray scale coefficient and the second gray scale coefficient;

wherein, the first gray scale coefficient of the adjusting sub-pixel is: the first gray scale coefficient of the color of the adjusting sub-pixel under the gray scale of the adjusting sub-pixel is as follows: and the second gray scale coefficient under the digital brightness corresponding to the image to be displayed.

11. The method of claim 1 or 9, wherein before controlling the sub-pixels of the test color to emit light at each of the x second digital luminances based on the adjusted test gray scale, the method further comprises:

acquiring a white picture to be displayed by the display panel;

adjusting the gray scale of the adjusting sub-pixel in the white picture according to the target parameter of the adjusting sub-pixel corresponding to the first area in the white picture;

controlling the display panel to display the adjusted white picture;

controlling the sub-pixel of the test color to emit light based on the adjusted test gray scale at each of the x second digital luminances, including:

when the display panel displays the white picture, if the second indication operation aiming at the display panel is used for indicating to perform image compensation, the sub-pixel of the test color is controlled to emit light based on the adjusted test gray scale under each second digital brightness in the x second digital brightnesses.

12. The method of claim 10, further comprising, before controlling the sub-pixels of the test color to emit light at each of the x second digital luminances based on the adjusted test gray scale:

acquiring a white picture to be displayed by the display panel;

adjusting the gray scale of the adjusting sub-pixel in the white picture according to the target parameter of the adjusting sub-pixel corresponding to the first area in the white picture;

controlling the display panel to display the adjusted white picture;

controlling the sub-pixel of the test color to emit light based on the adjusted test gray scale at each of the x second digital luminances, including:

when the display panel displays the white picture, if the second indication operation aiming at the display panel is used for indicating to perform image compensation, the sub-pixel of the test color is controlled to emit light based on the adjusted test gray scale under each second digital brightness in the x second digital brightnesses.

13. The method of any of claims 1-3, 5-9, and 12, wherein the sub-pixels comprise: a Thin Film Transistor (TFT), the method further comprising:

before the display panel displays the image to be displayed, if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is larger than a potential difference threshold value, controlling the sub-pixel not to emit light.

14. The method of claim 4, wherein the sub-pixels comprise: a Thin Film Transistor (TFT), the method further comprising:

before the display panel displays the image to be displayed, if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is larger than a potential difference threshold value, controlling the sub-pixel not to emit light.

15. The method of claim 10, wherein the sub-pixels comprise: a Thin Film Transistor (TFT), the method further comprising:

before the display panel displays the image to be displayed, if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is larger than a potential difference threshold value, controlling the sub-pixel not to emit light.

16. The method of claim 11, wherein the sub-pixels comprise: a Thin Film Transistor (TFT), the method further comprising:

before the display panel displays the image to be displayed, if the difference between the input potential and the output potential of the TFT of any sub-pixel in the display panel is larger than a potential difference threshold value, controlling the sub-pixel not to emit light.

17. The method of any of claims 1-3, 5-9, 12, and 14-16, further comprising:

and controlling the display panel to display an adjusting bar graph for embodying the gray scale adjustment degree, wherein any adjusting operation aiming at the display panel is an operation aiming at the adjusting bar graph.

18. The method of claim 4, further comprising:

and controlling the display panel to display an adjusting bar graph for embodying the gray scale adjustment degree, wherein any adjusting operation aiming at the display panel is an operation aiming at the adjusting bar graph.

19. The method of claim 10, further comprising:

and controlling the display panel to display an adjusting bar graph for embodying the gray scale adjustment degree, wherein any adjusting operation aiming at the display panel is an operation aiming at the adjusting bar graph.

20. The method of claim 11, further comprising:

and controlling the display panel to display an adjusting bar graph for embodying the gray scale adjustment degree, wherein any adjusting operation aiming at the display panel is an operation aiming at the adjusting bar graph.

21. The method of claim 13, further comprising:

and controlling the display panel to display an adjusting bar graph for embodying the gray scale adjustment degree, wherein any adjusting operation aiming at the display panel is an operation aiming at the adjusting bar graph.

22. An image compensation apparatus, characterized in that the image compensation apparatus comprises respective modules for performing the image compensation method of any one of claims 1 to 21.

23. An image compensation apparatus, comprising:

a processor;

a memory for storing executable instructions of the processor;

wherein the processor, when executing the executable instructions, is capable of implementing the image compensation method of any one of claims 1 to 21.

24. A display device characterized in that it comprises an image compensation device according to claim 22 or 23.

25. A display device as claimed in claim 24, wherein the display device comprises a display control chip, the image compensation means being integrated in the display control chip.

26. A computer-readable storage medium having instructions stored therein;

the instructions, when executed on a processing component, cause the processing component to perform the image compensation method of any of claims 1 to 21.

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