WO2021031255A1

WO2021031255A1 - Display panel and image display method

Info

Publication number: WO2021031255A1
Application number: PCT/CN2019/105259
Authority: WO
Inventors: 田新斌; 徐向阳
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2019-08-21
Filing date: 2019-09-11
Publication date: 2021-02-25
Also published as: CN110599938A; CN110599938B

Abstract

A display panel and an image display method. The image display method comprises: obtaining an image gray scale value of an image to be displayed; when the image gray scale value is less than a first preset threshold, obtaining gray scale signals respectively corresponding to a primary color photon pixel and a compensating photon pixel in said image; determining, according to the gray scale signals, target gray scale signals respectively corresponding to the primary color photon pixel and the compensating photon pixel; and accordingly outputting the target gray scale signals to the primary color photon pixel and the compensating photon pixel to display said image.

Description

Display panel and screen display method

Technical field

This application relates to the field of display technology, in particular to a display panel and a screen display method.

Background technique

Compared with the display panel of the traditional RGB pixel structure, the display panel of the RGBW pixel structure has a higher transmittance due to the addition of the W sub-pixel (white pixel) as a compensation photosub-pixel, which can improve the backlight utilization and display brightness , So as to reduce the power consumption of the display panel, reduce the cost, and have a better development prospect.

However, when displaying low grayscale images, the color purity, saturation, and contrast of the display panel with the RGBW pixel structure are not as good as those of the display panel with the traditional RGB pixel structure.

technical problem

The present application provides a display panel and a picture display method to improve the color purity, saturation and contrast of the display panel with RGBW pixel structure when displaying low-grayscale images.

Technical solutions

In order to solve the above problem, the embodiment of the present application provides a picture display method applied to a display panel. The display panel includes a plurality of pixels arranged in an array, and each pixel includes a primary color photo sub-pixel and a compensation photo sub-pixel. The method includes: obtaining The picture grayscale value of the picture to be displayed; determine whether the picture grayscale value is less than the first preset threshold; if so, obtain the first grayscale signal of the primary color photon pixel and the second grayscale signal of the compensated photon pixel in the picture to be displayed; According to the first gray scale signal and the second gray scale signal, determine the first target gray scale signal of the primary color photo sub-pixel and the second target gray scale signal of the compensated photo sub pixel; output the first target gray scale signal to the primary color photo sub pixel, and The compensated photon pixel outputs a second target grayscale signal to display the image to be displayed.

The step of determining the first target gray level signal of the primary color photo sub-pixel and the second target gray level signal of the photo sub-pixel according to the first gray level signal and the second gray level signal specifically includes: according to the first gray level signal and The second gray scale signal determines the first target gray scale signal of the primary color photo sub-pixel; the first preset signal is used as the second target gray scale signal of the compensated photo sub pixel.

Wherein, the gray scale voltage corresponding to the first preset signal is zero or negative polarity voltage.

The step of determining the first target gray level signal of the primary color photo sub-pixel and the second target gray level signal of the compensating photo sub-pixel according to the first gray level signal and the second gray level signal specifically includes: determining whether the image gray level value is less than The second preset threshold, the second preset threshold is less than the first preset threshold; if not, the second target gray-scale signal of the compensated photon pixel is determined according to the first preset ratio and the second gray-scale signal; The level signal, the second gray level signal, and the second target gray level signal determine the first target gray level signal of the primary color photo sub-pixel.

Wherein, after the step of determining whether the screen grayscale value is less than the second preset threshold, the method further includes: if the screen grayscale value is less than the second preset threshold, determining whether the screen grayscale value is less than the third preset threshold, and 3. The preset threshold is less than the second preset threshold; if not, the second target gray scale signal of the compensated photon pixel is determined according to the second preset ratio and the second gray scale signal; according to the first gray scale signal, the second gray scale signal The signal and the second target grayscale signal determine the first target grayscale signal of the primary color photo sub-pixel.

Wherein, after the step of determining whether the screen grayscale value is less than the third preset threshold, the method further includes: if the screen grayscale value is less than the third preset threshold, determining whether the screen grayscale value is less than the fourth preset threshold, and the fourth preset Set the threshold to be less than the third preset threshold; if not, determine the second target gray-scale signal of the compensated photon pixel according to the third preset ratio and the second gray-scale signal; according to the first gray-scale signal, the second gray-scale signal and The second target grayscale signal determines the first target grayscale signal of the primary color photo sub-pixel.

Among them, the primary color photo sub-pixels include red photo sub-pixels, green photo sub-pixels, and blue sub-pixels, and the compensation photo sub-pixels are white light sub-pixels. Among them, the first target gray scale signal is output to the primary color photo sub-pixels, and the second target gray level is output to the compensation photo sub-pixels. The step of displaying the picture to be displayed specifically includes: outputting a first target gray-scale signal to the red sub-pixel, green sub-pixel, and blue sub-pixel, and outputting a second target gray-scale signal to the white sub-pixel to display the Display the screen.

In order to solve the above-mentioned problem, the embodiment of the present application also provides a display panel, the display panel includes: a plurality of pixels arranged in an array, each pixel includes a primary color photo sub-pixel and a compensation photo sub-pixel; a first acquisition module for acquiring The screen grayscale value of the picture to be displayed; the first judging module is used to determine whether the screen grayscale value is less than the first preset threshold; the second acquisition module is used when the first judging module determines that the screen grayscale value is less than the first When the threshold is preset, the first grayscale signal of the primary color photon pixel and the second grayscale signal of the compensated photon pixel in the picture to be displayed are acquired; the determination module is used to determine the primary color according to the first grayscale signal and the second grayscale signal The first target grayscale signal of the photon pixel and the second target grayscale signal of the compensated photon pixel; an output module for outputting the first target grayscale signal to the primary color photon pixel and the second target grayscale signal to the compensated photon pixel To display the screen to be displayed.

Wherein, the determining module includes: a first determining unit, configured to determine the first target gray-scale signal of the primary color photo sub-pixel according to the first gray-scale signal and the second gray-scale signal; and the second determining unit, configured to set the first preset The signal is used as the second target grayscale signal for compensating the photon pixel.

Wherein, the determining module includes: a first determining unit, configured to determine whether the grayscale value of the screen is less than the second preset threshold when the first determining module determines that the grayscale value of the screen is less than the first preset threshold. Less than the first preset threshold; the third determining unit is used to determine the compensated photon pixel according to the first preset ratio and the second grayscale signal when the first determining unit determines that the grayscale value of the screen is not less than the second preset threshold The second target grayscale signal; the fourth determining unit is used to determine the first target grayscale signal of the primary color photo sub-pixel according to the first grayscale signal, the second grayscale signal, and the second target grayscale signal.

Wherein, the determining module further includes: a second determining unit, configured to determine whether the grayscale value of the screen is less than the third preset threshold when the first determining unit determines that the grayscale value of the screen is less than the second preset threshold. The threshold is less than the second preset threshold; the fifth determining unit is used to determine the compensated photon according to the second preset ratio and the second grayscale signal when the second determining unit determines that the grayscale value of the screen is not less than the third preset threshold The second target grayscale signal of the pixel.

Wherein, the determining module further includes: a third determining unit, configured to determine whether the grayscale value of the screen is less than the fourth preset threshold when the second determining unit determines that the grayscale value of the screen is less than the third preset threshold. The threshold is less than the third preset threshold; the sixth determining unit is used to determine the compensation photon according to the third preset ratio and the second grayscale signal when the third determining unit determines that the grayscale value of the screen is not less than the fourth preset threshold The second target grayscale signal of the pixel.

Wherein, the display panel further includes a plurality of scan lines arranged along the row direction and a plurality of data lines arranged along the column direction. The primary color photo sub-pixels include a first primary color photo sub-pixel, a second primary color photo sub-pixel, and a third primary color photo sub-pixel. A primary color photo sub-pixel, a second primary color photo sub-pixel, a third primary color photo sub-pixel, and a compensation photo sub-pixel are divided into a first primary color photo sub-pixel row arranged periodically and sequentially adjacently arranged in a direction from one end to the other end of the scan line , The second primary color photo sub-pixel column, the third primary color photo sub-pixel column and the compensation photo sub-pixel column, wherein each compensation photo sub-pixel column corresponds to a data line.

Wherein, the display panel further includes multiple scan lines arranged along the row direction and multiple data lines arranged along the column direction. The primary color photo sub-pixels include a first primary color photo sub-pixel, a second primary color photo sub-pixel, and a third primary color photo sub-pixel. The first primary color photo sub-pixels, the second primary color photo sub-pixels, the third primary color photo sub-pixels, and the compensation photo sub-pixels of one pixel are arranged in two adjacent rows and two columns, where the column of the compensation photo sub-pixels corresponds to two data lines.

Among them, the first primary color photo sub-pixel is a red photo sub-pixel, the second primary color photo sub-pixel is a green photo sub-pixel, the third primary color photo sub-pixel is a blue photo sub-pixel, and the compensation photo sub-pixel is a white photo sub-pixel.

Beneficial effect

The beneficial effect of this application is that, different from the prior art, the screen display method provided by this application is applied to a display panel, by acquiring the screen grayscale value of the screen to be displayed, and determining whether the screen grayscale value is less than the first preset threshold, If yes, obtain the first gray-scale signal of the primary color photo sub-pixel and the second gray-scale signal of the compensation photo sub-pixel in the picture to be displayed, and then determine the first target of the primary color photo sub-pixel according to the first gray-scale signal and the second gray-scale signal The grayscale signal and the second target grayscale signal of the compensated photon pixel, and then output the first target grayscale signal to the primary color photon pixel, and output the second target grayscale signal to the compensated photon pixel to display the picture to be displayed, so, It can improve the color purity, saturation and contrast of the display panel with RGBW pixel structure when displaying low grayscale images, which is conducive to presenting higher resolution, improving product image quality and market competitiveness.

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely inventions For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the first flow of a screen display method provided by an embodiment of the present application;

2 is a schematic diagram of a second flow of a screen display method provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a third process of a screen display method provided by an embodiment of the present application;

4 is a schematic structural diagram of a display panel provided by an embodiment of the present application;

FIG. 5 is another schematic diagram of the structure of the display panel provided by the embodiment of the present application;

FIG. 6 is another schematic structural diagram of the display panel provided by the embodiment of the present application.

Embodiments of the invention

Please refer to FIG. 1. FIG. 1 is a schematic diagram of the first process of a picture display method provided by an embodiment of the present application, which is applied to a display panel. The display panel includes a plurality of pixels arranged in an array, and each pixel includes a primary color photon pixel and a compensation photon Pixels, the specific process of the screen display method may include the following:

S101: Obtain a picture grayscale value of a picture to be displayed.

In this embodiment, the display panel acquires the image grayscale value of the image to be displayed. The image grayscale value is the concept of brightness, and the image grayscale value is an integer. The value from small to large represents the brightness from dark to light, corresponding to the image to be displayed The colors in are from black to white. Further, the screen grayscale value is the result of the overall combination of the grayscale values of each pixel in the screen to be displayed, and reflects the brightness display effect of the entire screen to be displayed. Wherein, the image grayscale value may be obtained from the source driver IC, or may be obtained through calculation based on the grayscale signal of each pixel in the image to be displayed.

S102: Determine whether the screen grayscale value is less than the first preset threshold, if yes, execute the subordinate step S103, if not, display the to-be-displayed screen according to the existing method.

The first preset threshold is a criterion for judging whether the picture to be displayed is a low grayscale image. If the picture grayscale value is less than the first preset threshold, the picture to be displayed is a low grayscale image. If the picture grayscale value is not If it is less than the first preset threshold, the image to be displayed is a high grayscale image.

In this embodiment, the first preset threshold is set based on the maximum screen grayscale value of the display panel. For example, when the maximum screen grayscale value of the display panel is 500, the first preset threshold may be set as 3. Among them, the maximum screen grayscale value can be obtained from the source driver IC.

S103: Obtain the first gray-scale signal of the primary color photo sub-pixel and the second gray-scale signal of the compensation photo sub-pixel in the picture to be displayed.

Specifically, the above-mentioned display panel further includes a plurality of scan lines arranged in a row direction and a plurality of data lines arranged in a column direction, wherein the primary color photo sub-pixels and the compensation photo sub-pixels are respectively connected to the data lines correspondingly.

If the image grayscale value of the image to be displayed is less than the first preset threshold, that is, the image to be displayed is a low grayscale image, the first grayscale signal of the primary color photon pixel in the image to be displayed and the compensation photon pixel The second gray-scale signal, where the first gray-scale signal and the second gray-scale signal respectively correspond to the gray-scale voltages outputted to the primary color sub-pixel and the compensation photo sub-pixel by the data line to drive the primary color photo sub-pixel and the compensation photo sub-pixel to emit light.

S104: According to the first gray-scale signal and the second gray-scale signal, determine the first target gray-scale signal of the primary color photo sub-pixel and the second target gray-scale signal of the compensation photo sub-pixel.

Optionally, the primary color photo sub-pixels include red photo sub-pixels (R), green photo sub-pixels (G) and blue photo sub-pixels (B), the compensation photo sub-pixels are white photo sub-pixels (W), and the corresponding display panel is a display of RGBW pixel structure. panel.

Further, S104 may specifically include:

(1) According to the first gray scale signal and the second gray scale signal, determine the first target gray scale signal of the primary color photo sub-pixel.

Specifically, in order to solve the problems of low color purity, saturation, and low contrast in the display panel of the RGBW pixel structure when displaying low grayscale images, the original method of driving R, G, B, and W to emit light at the same time is converted to simultaneous driving The way that R, G, and B emit light without driving W to emit light is equivalent to converting a display panel with an RGBW pixel structure into a display panel with an RGB pixel structure.

Using the method of driving R, G, B to emit light at the same time and not driving W to emit light, that is, the W-compensated photon pixel in the picture to be displayed is not driven. If the first grayscale signal is directly output to R, G, B, the picture will appear distortion. Therefore, in order to avoid picture distortion, it is necessary to re-determine the gray-scale signals corresponding to R, G, and B in the picture to be displayed according to the first gray-scale signals corresponding to R, G, and B and the second gray-scale signals corresponding to W. The gray scale signals corresponding to R, G, and B in the to-be-displayed image after re-determination are used as the second target gray scale signal.

(2) Use the first preset signal as the second target grayscale signal for compensating the photon pixels.

Wherein, the gray-scale voltage corresponding to the first preset signal is zero or a negative voltage, so that the second target gray-scale signal cannot drive the compensated photon pixel to emit light.

S105: Output the first target gray-scale signal to the primary color photo sub-pixel, and output the second target gray-scale signal to the compensated photo sub-pixel, so as to display the image to be displayed.

Different from the prior art, the screen display method provided in this embodiment obtains the screen grayscale value of the screen to be displayed, and determines whether the screen grayscale value is less than the first preset threshold, and if so, obtains the primary color photon of the screen to be displayed The first grayscale signal of the pixel and the second grayscale signal of the compensated photon pixel, and then the first target grayscale signal of the primary color photon pixel and the second grayscale signal of the compensated photon pixel are determined according to the first grayscale signal and the second grayscale signal. The target gray scale signal, and then output the first target gray scale signal to the primary color photo sub-pixel, and output the second target gray scale signal to the compensating photo sub-pixel to display the image to be displayed. In this way, the display panel of the RGBW pixel structure can be improved The color purity, saturation, and contrast of low-gray-scale images are conducive to higher resolution, improving product image quality and market competitiveness.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of the second process of the screen display method provided by the embodiment of the present application, which is applied to a display panel. The display panel includes a plurality of pixels arranged in an array, and each pixel includes a primary color photon pixel and a compensation photon Pixels, the specific process of the screen display method may include the following:

S201: Obtain a picture grayscale value of a picture to be displayed.

Optionally, the display panel obtains the image grayscale value of the image to be displayed from the source driver IC, where the image grayscale value is the result of the overall combination of the grayscale values of each pixel in the image to be displayed, reflecting the overall image of the image to be displayed Brightness situation.

S202: Determine whether the screen grayscale value is less than the first preset threshold, if yes, execute the subordinate step S203, if not, display the to-be-displayed screen according to the existing method.

The first preset threshold is used to determine the grayscale level of the picture to be displayed. If the grayscale value of the picture is less than the first preset threshold, the picture to be displayed is a first-level low-grayscale image. If the grayscale value of the picture is not less than The first preset threshold, the picture to be displayed is a high-grayscale image.

In this embodiment, the first preset threshold is set based on the maximum screen grayscale value of the display panel. For example, when the maximum screen grayscale value of the display panel is 500, the first preset threshold may be set as 10. Among them, the maximum screen grayscale value can be obtained from the source driver IC.

S203: Obtain the first gray-scale signal of the primary color photo sub-pixel and the second gray-scale signal of the compensation photo sub-pixel in the picture to be displayed.

Specifically, the above-mentioned display panel includes a plurality of scan lines arranged in a row direction and a plurality of data lines arranged in a column direction, wherein the primary color photo sub-pixels and the compensation photo sub-pixels are correspondingly connected to the data lines.

If the screen grayscale value of the picture to be displayed is less than the first preset threshold, that is, the picture to be displayed is a first-level low-grayscale image, the first grayscale signal of the primary color photo sub-pixels in the picture to be displayed is obtained and compensated The second gray-scale signal of the photonic pixel, where the first gray-scale signal and the second gray-scale signal respectively correspond to the gray-scale voltages output to the primary color photon pixel and the compensation photon pixel by the data line to drive the primary color photon pixel and the compensation photon The pixels emit light.

S204: Determine whether the screen grayscale value is less than the second preset threshold, and the second preset threshold is less than the first preset threshold; if not, execute the subordinate steps S205, S206, and S207 in sequence; if yes, execute the subordinate steps S208, S209, S207.

The second preset threshold is used to determine the grayscale level of the screen to be displayed. If the screen grayscale value is less than the second preset threshold, the screen to be displayed is a second-level low-grayscale image, and if the screen grayscale value is not less than With the first preset threshold, the picture to be displayed is a first-level low-grayscale image.

In this embodiment, the second preset threshold is set based on the maximum screen grayscale value of the display panel and the first preset threshold. For example, when the maximum screen grayscale value of the display panel is 500, the first preset threshold The threshold is set to 10, and the second preset threshold can be set to 5.

Further, if the screen grayscale value is not less than the second preset threshold, the subordinate steps S205, S206, and S207 are executed in sequence; if the screen grayscale value is less than the second preset threshold, the subordinate steps S208, S209, and S207 are executed in sequence. Among them, S205, S206, S207, S208, and S209 are as follows:

S205: Determine a second target gray level signal for compensating the photo sub-pixel according to the first preset ratio and the second gray level signal.

If the screen grayscale value is not less than the second preset threshold, that is, the image to be displayed is a first-level low-grayscale image, the second grayscale signal is reduced according to the first preset ratio, and the reduced second grayscale signal As the second target grayscale signal.

Among them, the best value of the first preset ratio can be determined through experiments and actual photoelectric performance tests. For example, the first preset ratio is 1:2, the maximum screen grayscale value of the display panel is 500, the first preset threshold is 10, and the second preset threshold is 5, that is, if the screen grayscale value is less than 10 and greater than or equal to 5. The second grayscale signal is reduced to half of the original, and the grayscale value of the compensated photon pixel in the corresponding to-be-displayed image is also reduced to half of the original.

S206: Determine the first target grayscale signal of the primary color photo sub-pixel according to the first grayscale signal, the second grayscale signal, and the second target grayscale signal.

After the grayscale signal corresponding to the compensated photon pixel in the image to be displayed is weakened, in order to avoid image distortion, it is necessary to re-determine the image to be displayed according to the first grayscale signal, the second grayscale signal, and the second target grayscale signal The gray-scale signal corresponding to the primary color photo sub-pixel in the image to be displayed is determined as the second target gray-scale signal.

S207: Output the first target gray-scale signal to the primary color photo sub-pixel, and output the second target gray-scale signal to the compensating photo sub-pixel to display the image to be displayed.

S208: Determine the first target gray-scale signal of the primary color photo sub-pixel according to the first gray-scale signal and the second gray-scale signal.

Specifically, the display panel displays the image to be displayed by driving the primary color photo sub-pixels to emit light and not driving the compensation photo sub-pixels to emit light. In order to avoid picture distortion, it is necessary to re-determine the gray-scale signal corresponding to the primary-color photo-sub-pixel in the picture to be displayed according to the first gray-scale signal corresponding to the primary-color photo-sub-pixel and the second gray-scale signal corresponding to the compensation photo-sub-pixel in the picture to be displayed, and The determined gray scale signal corresponding to the primary color photo sub-pixel in the picture to be displayed is used as the second target gray scale signal.

S209: Use the first preset signal as a second target grayscale signal for compensating the photo sub-pixel.

Optionally, referring to Figure 3, S204 may also be:

It is determined whether the screen grayscale value is less than the second preset threshold, and the second preset threshold is less than the first preset threshold. If not, the subordinate steps S205, S206, and S207 are performed in sequence, and if so, the subordinate step S210 is performed. Among them, S205, S206, and S207 are as described above, and S210 is specifically as follows:

S210: Determine whether the screen grayscale value is less than the third preset threshold, and the third preset threshold is less than the second preset threshold; if not, execute the subordinate steps S211, S206, and S207 in sequence; if yes, execute the subordinate steps S208, S209 and S207.

The third preset threshold is used to determine the grayscale level of the picture to be displayed. If the grayscale value of the picture is less than the third preset threshold, the picture to be displayed is a third-level low-grayscale image. If the grayscale value of the picture is not less than With the third preset threshold, the image to be displayed is a second-level low-grayscale image.

In this embodiment, the third preset threshold is set based on the maximum screen grayscale value of the display panel, the first preset threshold, and the second preset threshold value, for example, when the maximum screen grayscale value of the display panel Is 120, the first preset threshold is 10, and the second preset threshold is 5. The third preset threshold can be set to 3.

Further, if the screen grayscale value is not less than the third preset threshold, the subordinate steps S211, S206, and S207 are executed in sequence; if the screen grayscale value is less than the second preset threshold, the subordinate steps S208, S209, and S207 are executed in sequence. Among them, S206, S207, S208, and S209 are as described above, and S211 is specifically as follows:

S211: Determine a second target gray-scale signal for compensating the photo sub-pixel according to the second preset ratio and the second gray-scale signal.

If the screen grayscale value is not less than the third preset threshold, that is, the image to be displayed is a second-level low-grayscale image, the second grayscale signal is reduced according to the second preset ratio, and the reduced second grayscale signal As the second target grayscale signal.

Among them, the optimal value of the second preset ratio can be determined through experiments and actual photoelectric performance tests. For example, the second preset ratio is 1:10, the first preset ratio is 1:2, the maximum screen grayscale value of the display panel is 500, the first preset threshold is 10, the second preset threshold is 5, The third preset threshold is 3, that is, if the screen grayscale value is less than 10 and greater than or equal to 5, the second grayscale signal is reduced to half of the original, and the corresponding grayscale value of the compensated photon pixel in the image to be displayed is also reduced to Half of the original. If the screen grayscale value is less than 5 and greater than or equal to 3, the second grayscale signal is reduced to one tenth of the original, and the corresponding grayscale value of the compensated photon pixel in the image to be displayed is also reduced to the original One-tenth of that. Further, if it is less than 3, the second grayscale signal can be reduced to zero, and the grayscale value of the compensated photon pixel in the corresponding picture to be displayed is also reduced to zero, that is, the compensated photon pixel in the picture to be displayed is not driven to emit light .

Optionally, in other embodiments, S210 may also be:

Determine whether the screen grayscale value is less than the third preset threshold, the third preset threshold is less than the second preset threshold, if not, the subordinate steps S211, S206, and S207 are executed in sequence, and if so, the following steps are executed in sequence:

(1) Determine whether the screen grayscale value is less than the fourth preset threshold, and the fourth preset threshold is less than the third preset threshold;

(2) If not, determine the second target gray scale signal of the compensated photon pixel according to the third preset ratio and the second gray scale signal, and determine the second target gray scale signal of the compensated photon pixel according to the first gray scale signal, the second gray scale signal and the second target gray scale The signal determines the first target grayscale signal of the primary color photo sub-pixel;

(3) If the screen grayscale value is less than the third preset threshold, it is determined whether the screen grayscale value is less than the fifth preset threshold, and the fifth preset threshold is less than the fourth preset threshold;

(4) If not, determine the second target gray scale signal of the compensated photon pixel according to the fourth preset ratio and the second gray scale signal, and determine the second target gray scale signal of the compensated photon pixel according to the first gray scale signal, the second gray scale signal and the second target gray scale The signal determines the first target grayscale signal of the primary color photo sub-pixel;

By analogy, multiple preset thresholds can be set, corresponding to multiple low grayscale levels of the to-be-displayed picture, and different levels of low-gray-scale to-be-displayed pictures have different degrees of attenuation of the corresponding compensated photon pixel grayscale signals. Among them, the smaller the preset threshold, the smaller the corresponding preset ratio. Moreover, if the screen grayscale value is less than the minimum preset threshold, the above S208, S209, and S207 are executed in sequence to display the screen to be displayed.

Please refer to FIG. 4, which is a schematic structural diagram of a display panel provided by an embodiment of the present application. The display panel 600 includes: a plurality of pixels (shown in the figure) arranged in an array, a first acquisition module 601, a first determination module 602, a second acquisition module 603, a determination module 604, and an output module 605, wherein:

(1) Multiple pixels

Among them, each pixel includes a primary color photo sub-pixel and a compensation photo sub-pixel. Optionally, the primary color photo sub-pixels include a first primary color photo sub-pixel, a second primary color photo sub-pixel, and a third primary color photo sub-pixel.

(2) The first acquisition module 601

The first obtaining module 601 is configured to obtain the screen grayscale value of the screen to be displayed.

Among them, the screen grayscale value is the result of the overall combination of the grayscale values of each pixel in the screen to be displayed, and reflects the overall brightness of the screen to be displayed.

(3) The first judgment module 602

The first determining module 602 is configured to determine whether the grayscale value of the screen is less than a first preset threshold.

(4) The second acquisition module 603

The second acquisition module 603 is configured to acquire the first gray level signal of the primary color photo sub-pixel and the second gray level of the compensation photo sub-pixel in the image to be displayed when the first determination module 602 determines that the image gray level value is less than the first preset threshold. Order signal.

Wherein, the first gray-scale signal and the second gray-scale signal respectively correspond to the gray-scale voltages output to the primary color photo sub-pixel and the compensation photo sub-pixel to drive the primary color photo sub-pixel and the compensation photo sub-pixel to emit light.

(5) Confirmation module 604

The determining module 604 is configured to determine the first target gray level signal of the primary color photo sub-pixel and the second target gray level signal of the compensation photo sub-pixel according to the first gray level signal and the second gray level signal.

(6) Output module 605

The output module 605 is configured to output a first target gray-scale signal to the primary color photo sub-pixels, and output a second target gray-scale signal to the compensated photo sub-pixels to display the image to be displayed.

In an embodiment, the determining module 604 may specifically include:

A determining module, configured to determine the first target gray-scale signal of the primary color photo sub-pixel according to the first gray-scale signal and the second gray-scale signal;

The second determining unit is configured to use the first preset signal as the second target grayscale signal for compensating the photo sub-pixel.

In another embodiment, the determining module 604 may specifically include:

The first determining unit is configured to determine whether the screen grayscale value is less than a second preset threshold when the first determining module 602 determines that the screen grayscale value is less than the first preset threshold, and the second preset threshold is less than the first preset threshold Threshold

The third determining unit is configured to determine the second target grayscale signal of the compensated photon pixel according to the first preset ratio and the second grayscale signal when the first determining unit determines that the image grayscale value is not less than the second preset threshold value ；

The fourth determining unit is configured to determine the first target gray scale signal of the primary color photo sub-pixel according to the first gray scale signal, the second gray scale signal and the second target gray scale signal.

Further, the determining module 604 may also include:

The second judging unit is used for judging whether the screen grayscale value is less than the third preset threshold when the first judging unit determines that the screen grayscale value is less than the second preset threshold, and the third preset threshold is less than the second preset threshold ；

The fifth determining unit is configured to determine the second target grayscale signal of the compensated photon pixel according to the second preset ratio and the second grayscale signal when the second determining unit determines that the grayscale value of the screen is not less than the third preset threshold. .

In specific implementation, each of the above modules or units can be implemented as independent entities, or can be combined arbitrarily, and implemented as the same or several entities. For the specific implementation of each of the above modules or units, please refer to the previous method embodiments. No longer.

In one embodiment, referring to FIG. 5, the display panel 600 further includes a plurality of scan lines G1~Gn arranged along the row direction and a plurality of data lines D1~Dm arranged along the column direction. The primary color photo sub-pixels include red photo sub-pixels. R, the green sub-pixel G and the blue sub-pixel B, the compensation photo sub-pixel is the white sub-pixel W, R, G, B, W are divided into periodic arrangement and arranged adjacently in the direction from one end of the scan line to the other end The R column, G column, B column and W column of, wherein each W column corresponds to a data line, so that the display panel can independently control the W gray-scale signal when displaying gray-scale images.

In another embodiment, referring to FIG. 6, the display panel 600 further includes a plurality of scan lines G1~Gn arranged along the row direction and a plurality of data lines D1~Dm arranged along the column direction. The primary color photon pixels include red photon pixels. Pixel R, green sub-pixel G, and blue sub-pixel B, the compensation photo sub-pixel is white sub-pixel W, and the R, G, B, and W of each pixel are arranged in two adjacent rows and two columns, where the column where W corresponds The two data lines enable the display panel to independently control the gray-scale signal of W when displaying the gray-scale image.

Different from the prior art, the display panel provided in this application obtains the image grayscale value of the image to be displayed, and determines whether the image grayscale value is less than the first preset threshold, and if so, obtains the value of the primary color photon pixel in the image to be displayed The first grayscale signal and the second grayscale signal of the compensated photon pixel, and then the first target grayscale signal of the primary color photon pixel and the second target grayscale signal of the compensated photon pixel are determined according to the first grayscale signal and the second grayscale signal Then output the first target gray-level signal to the primary color photo sub-pixel, and output the second target gray-level signal to the compensating photo sub-pixel to display the image to be displayed. In this way, the display panel with the RGBW pixel structure can display low gray levels. The color purity, saturation, and contrast of high-level images are conducive to higher resolution, improving product image quality and market competitiveness.

The above descriptions are only preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A picture display method applied to a display panel, wherein the display panel includes a plurality of pixels arranged in an array, each of the pixels includes a primary color photo sub-pixel and a compensation photo sub-pixel, the method includes:

Obtain the screen grayscale value of the screen to be displayed;

Judging whether the screen grayscale value is less than a first preset threshold;

If yes, acquiring the first gray-scale signal of the primary color photo sub-pixel and the second gray-scale signal of the compensation photo sub-pixel in the picture to be displayed;

Determining a first target gray level signal of the primary color photo sub-pixel and a second target gray level signal of the compensation photo sub-pixel according to the first gray level signal and the second gray level signal;

The first target grayscale signal is output to the primary color photo sub-pixel, and the second target grayscale signal is output to the compensation photo sub-pixel to display the to-be-displayed picture.
The picture display method according to claim 1, wherein the first target gray-scale signal of the primary color photon pixel and the compensation photon are determined according to the first gray-scale signal and the second gray-scale signal. The steps of the second target grayscale signal of the pixel specifically include:

Determining the first target gray scale signal of the primary color photo sub-pixel according to the first gray scale signal and the second gray scale signal;

The first preset signal is used as the second target grayscale signal of the compensated photo sub-pixel.
3. The image display method according to claim 2, wherein the gray scale voltage corresponding to the first preset signal is zero or negative polarity voltage.
The picture display method according to claim 1, wherein the first target gray-scale signal of the primary color photon pixel and the compensation photon are determined according to the first gray-scale signal and the second gray-scale signal. The steps of the second target grayscale signal of the pixel specifically include:

Determining whether the screen grayscale value is less than a second preset threshold, and the second preset threshold is less than the first preset threshold;

If not, determining the second target grayscale signal of the compensated photon pixel according to the first preset ratio and the second grayscale signal;

The first target gray scale signal of the primary color photo sub-pixel is determined according to the first gray scale signal, the second gray scale signal, and the second target gray scale signal.
The screen display method according to claim 4, wherein after the step of determining whether the screen grayscale value is less than a second preset threshold, the method further comprises:

If the screen grayscale value is less than the second preset threshold, determining whether the screen grayscale value is less than a third preset threshold, and the third preset threshold is less than the second preset threshold;

If not, determining the second target grayscale signal of the compensated photon pixel according to a second preset ratio and the second grayscale signal;

The first target gray scale signal of the primary color photo sub-pixel is determined according to the first gray scale signal, the second gray scale signal, and the second target gray scale signal.
5. The screen display method according to claim 5, wherein after the step of determining whether the screen grayscale value is less than a third preset threshold, the method further comprises:

If the screen grayscale value is less than the third preset threshold, determining whether the screen grayscale value is less than a fourth preset threshold, and the fourth preset threshold is less than the third preset threshold;

If not, determining the second target gray scale signal of the compensated photon pixel according to a third preset ratio and the second gray scale signal;

The first target gray scale signal of the primary color photo sub-pixel is determined according to the first gray scale signal, the second gray scale signal, and the second target gray scale signal.
The picture display method according to claim 1, wherein the primary color photo sub-pixels include red photo sub-pixels, green photo sub-pixels, and blue photo sub-pixels, and the compensation photo sub-pixels are white photo sub-pixels,

Wherein, the step of outputting the first target gray-scale signal to the primary color photo sub-pixel and outputting the second target gray-scale signal to the compensation photo sub-pixel to display the to-be-displayed picture specifically includes:

The first target gray-scale signal is output to the red sub-pixel, the green sub-pixel, and the blue sub-pixel, and the second target gray-scale signal is output to the white sub-pixel to display the waiting Display the screen.
A display panel, which includes:

A plurality of pixels arranged in an array, each of the pixels includes a primary color photo sub-pixel and a compensation photo sub-pixel;

The first obtaining module is used to obtain the screen grayscale value of the screen to be displayed;

The first judgment module is configured to judge whether the grayscale value of the screen is less than a first preset threshold;

The second acquiring module is configured to acquire the first grayscale signal of the primary color photo sub-pixel in the image to be displayed when the first determining module determines that the image grayscale value is less than the first preset threshold value And the second grayscale signal of the compensated photon pixel;

A determining module, configured to determine a first target gray level signal of the primary color photo sub-pixel and a second target gray level signal of the compensation photo sub-pixel according to the first gray level signal and the second gray level signal;

The output module is configured to output the first target gray-scale signal to the primary color photo sub-pixel, and output the second target gray-scale signal to the compensation photo sub-pixel to display the to-be-displayed picture.
The display panel according to claim 8, wherein the determining module comprises:

A first determining unit, configured to determine the first target grayscale signal of the primary color photo sub-pixel according to the first grayscale signal and the second grayscale signal;

The second determining unit is configured to use a first preset signal as the second target grayscale signal of the compensated photon pixel.
9. The display panel of claim 9, wherein the gray-scale voltage corresponding to the first preset signal is zero or negative polarity voltage.
The display panel according to claim 8, wherein the determining module comprises:

The first determining unit is configured to determine whether the screen grayscale value is less than a second preset threshold when the first determining module determines that the screen grayscale value is less than the first preset threshold, and the first 2. The preset threshold is less than the first preset threshold;

The third determining unit is configured to determine the screen grayscale value according to the first preset ratio and the second grayscale signal when the first determining unit determines that the screen grayscale value is not less than the second preset threshold. Compensating the second target grayscale signal of the photon pixel;

The fourth determining unit is configured to determine the first target gray scale signal of the primary color photo sub-pixel according to the first gray scale signal, the second gray scale signal, and the second target gray scale signal.
The display panel according to claim 11, wherein the determining module further comprises:

The second determining unit is configured to determine whether the screen grayscale value is less than a third preset threshold when the first determining unit determines that the screen grayscale value is less than the second preset threshold, and the first 3. The preset threshold is less than the second preset threshold;

The fifth determining unit is configured to determine the screen grayscale value according to a second preset ratio and the second grayscale signal when the second determining unit determines that the screen grayscale value is not less than the third preset threshold Compensating the second target grayscale signal of the photon pixel.
The display panel according to claim 12, wherein the determining module further comprises:

The third determining unit is configured to determine whether the screen grayscale value is less than the fourth preset threshold when the second determining unit determines that the screen grayscale value is less than the third preset threshold, and the first 4. The preset threshold is less than the third preset threshold;

The sixth determining unit is configured to determine the screen grayscale value according to the third preset ratio and the second grayscale signal when the third determining unit determines that the screen grayscale value is not less than the fourth preset threshold value. Compensating the second target grayscale signal of the photon pixel.
8. The display panel according to claim 8, wherein the display panel further comprises a plurality of scan lines arranged in a row direction and a plurality of data lines arranged in a column direction, and the primary color photo sub-pixels comprise first primary color photo sub-pixels , The second primary color photo sub-pixel and the third primary color photo sub-pixel, the first primary color photo sub-pixel, the second primary color photo sub-pixel, the third primary color photo sub-pixel, and the compensation photo sub-pixel along the line from the scan line One end is divided into a first primary color photo sub-pixel column, a second primary color photo sub-pixel column, a third primary color photo sub-pixel column, and a compensation photo sub-pixel column that are periodically arranged and arranged adjacently in the direction from one end to the other end. The compensated photo sub-pixel column corresponds to one data line.
8. The display panel according to claim 8, wherein the display panel further comprises a plurality of scan lines arranged in a row direction and a plurality of data lines arranged in a column direction, and the primary color photo sub-pixels comprise first primary color photo sub-pixels , Second primary color photo sub-pixels and third primary color photo sub-pixels, the first primary color photo sub-pixels, second primary color photo sub-pixels, third primary color photo sub-pixels and compensation photo sub-pixels of each pixel are arranged in two adjacent rows and two columns, Wherein, the column where the compensated photon pixel is located corresponds to the two data lines.
The display panel according to claim 14 or 15, wherein the first primary color photo sub-pixel is a red photo sub-pixel, the second primary color photo sub-pixel is a green photo sub-pixel, and the third primary color photo sub-pixel is a blue sub-pixel, The compensation photo sub-pixel is a white photo sub-pixel.