WO2021169559A1 - Display device and driving method and driving device therefor, and computer-readable storage medium - Google Patents

Abstract

A display device and a driving method and a driving device therefor, and a computer-readable storage medium, being capable of improving the display effect of the display device under different ambient brightness. The driving method for the display device comprises: acquiring ambient brightness (S110); acquiring picture data, the picture data comprising gray scale values of pixels of an image to be displayed (S120); performing contrast correction on the picture data according to the ambient brightness, so as to obtain corrected picture data (S130); and driving, according to the corrected picture data, the display device to display a picture (S140).

Description

Display device, driving method thereof, driving device, and computer readable storage medium

cross reference

This disclosure claims the priority of the Chinese patent application filed on February 28, 2020, with the application number 202010130370.2 and titled "Display device and its driving method and driving device, and computer-readable storage medium". All of the Chinese patent application The content is fully incorporated into this article by reference.

Technical field

The present disclosure relates to the field of display technology, and in particular to a display device, a driving method thereof, a driving device, and a computer-readable storage medium.

Background technique

With the development of display technology, display screens are increasingly used in outdoor or semi-open lighting places. For example, many digital billboards will be placed in open-air shopping areas, semi-open lighting shopping malls or outdoor areas to achieve information release, commercial promotion, and so on.

However, in outdoor areas, semi-open lighting areas or open-air areas, the ambient light will change greatly with the day and night or the weather. The display effect of the display device will vary with the change of the ambient light, which may reduce the display effect, realize the unclear display content, and affect the efficiency of information release and commercial promotion.

The above-mentioned information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, and therefore it may include information that does not constitute the prior art known to those of ordinary skill in the art.

Public content

The purpose of the present disclosure is to provide a display device, a driving method thereof, a driving device, and a computer-readable storage medium, which are used to improve the display effect of the display device under different environmental brightness.

In order to achieve the above-mentioned purpose of the invention, the present disclosure adopts the following technical solutions:

According to a first aspect of the present disclosure, there is provided a driving method of a display device, including:

Get the ambient brightness;

Acquiring picture data, where the picture data includes the grayscale value of each pixel of the image to be displayed;

Performing contrast correction on the picture data according to the environmental brightness to obtain corrected picture data;

According to the corrected screen data, the display device is driven to display a screen.

In an exemplary embodiment of the present disclosure, performing contrast correction on the picture data to obtain corrected picture data according to the environmental brightness includes:

Determining the maximum grayscale value in the picture data according to the picture data;

Correcting the maximum grayscale value according to the magnitude of the environmental brightness to obtain the corrected maximum grayscale value;

According to the corrected maximum grayscale value, the grayscale value of each pixel of the image to be displayed is corrected to obtain the corrected grayscale value of each pixel of the image to be displayed.

In an exemplary embodiment of the present disclosure, correcting the maximum grayscale value according to the magnitude of the environmental brightness to obtain the corrected maximum grayscale value includes:

Judging whether the environmental brightness is less than a first brightness threshold;

In response to the environmental brightness being less than the first brightness threshold, the maximum grayscale value is corrected according to the following formula:

Wherein, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₁ is the first threshold gray scale, G ₁₂ is the second threshold gray scale, G ₂₁ is the first reference gray scale, and G ₂₂ is the second reference gray scale.

In an exemplary embodiment of the present disclosure, correcting the maximum grayscale value according to the magnitude of the environmental brightness to obtain the corrected maximum grayscale value includes:

Judging whether the environmental brightness is greater than a second brightness threshold;

In response to the environmental brightness being greater than the second brightness threshold, the maximum grayscale value is corrected according to the following formula:

Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₃ is the third threshold gray scale, G ₁₄ is the fourth threshold gray scale, G ₂₃ is the third reference gray scale, and G ₂₄ is the fourth reference gray scale.

In an exemplary embodiment of the present disclosure, correcting the maximum grayscale value according to the magnitude of the environmental brightness to obtain the corrected maximum grayscale value includes:

Judging whether the environmental brightness is between the first brightness threshold and the second brightness threshold;

In response to L ₁ ≤L _c ≤L ₂ , the maximum gray scale value is corrected according to the following formula:

Wherein, L ₁ is the first brightness threshold, L _c is the ambient brightness, L ₂ is the second brightness threshold, _G'max is the corrected maximum gray scale value, G _max is the maximum gray scale value, and G ₁₅ is the first brightness threshold. Five-threshold gray scale, G ₁₆ is the sixth threshold gray scale, G ₂₅ is the fifth reference gray scale, and G ₂₆ is the sixth reference gray scale.

In an exemplary embodiment of the present disclosure, the maximum grayscale value that the display device can display is 255;

According to the magnitude of the environmental brightness, correcting the maximum grayscale value to obtain the corrected maximum grayscale value includes:

Determine the magnitude relationship between the environmental brightness and the first brightness threshold and the second brightness threshold;

In response to the environmental brightness being less than the first brightness threshold, the maximum grayscale value is corrected according to the following formula:

Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₁ is the first threshold gray scale, and 56≤G ₁₁ ≤72; G ₁₂ is the second threshold gray scale, and 180 ≤G ₁₂ ≤220; G ₂₁ is the first reference gray scale, and 180≤G ₂₁ ≤220; G ₂₂ is the second reference gray scale, and 32≤G ₂₂ ≤48;

In response to the environmental brightness being greater than the second brightness threshold, the maximum grayscale value is corrected according to the following formula:

Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₃ is the third threshold gray scale, and 56≤G ₁₃ ≤72; G ₁₄ is the fourth threshold gray scale, and 180 ≤G ₁₄ ≤220; G ₂₃ is the third reference gray scale, and 240≤G ₂₃ ≤255; G ₂₄ is the fourth reference gray scale, and 0≤G ₂₄ ≤10;

In response to L ₁ ≤L _c ≤L ₂ , the maximum gray scale value is corrected according to the following formula:

Wherein, L ₁ is the first brightness threshold, L _c is the ambient brightness, L ₂ is the second brightness threshold, _G'max is the corrected maximum gray scale value, G _max is the maximum gray scale value, and G ₁₅ is the first brightness threshold. Five-threshold grayscale, and 112≤G ₁₅ ≤144; G ₁₆ is the sixth threshold grayscale, and 240≤G ₁₆ ≤255; G ₂₅ is the fifth reference grayscale, and 240≤G ₂₅ ≤255; G ₂₆ is The sixth reference gray scale, and 0≤G ₂₆ ≤10.

In an exemplary embodiment of the present disclosure, according to the corrected maximum grayscale value, correcting the grayscale value of each pixel of the image to be displayed, and obtaining the corrected grayscale value of each pixel of the image to be displayed includes:

Obtain the corrected grayscale value of each pixel of the image to be displayed;

Among them, the corrected grayscale value of any pixel of the image to be displayed is obtained according to the following formula:

Among them, G′ _{(x, y)} is the corrected grayscale value _{of the pixel P (x, y)} in the x-th row and y-th column of the image _{to be displayed, and G (x, y)} is the x-th row, The gray scale value of the pixel P _{(x, y) in the y-th column, G'max} is the corrected maximum gray scale value, and G is the maximum gray scale value that the display device can display; wherein, the round(n) function indicates that n Round up to the nearest whole number.

In an exemplary embodiment of the present disclosure, the driving method of the display device further includes:

According to the environmental brightness, the light emission brightness of the light source of the display device is adjusted.

In an exemplary embodiment of the present disclosure, the display device is a liquid crystal display device; adjusting the brightness of the light source of the display device includes:

Adjust the brightness of the backlight assembly of the display device.

According to a second aspect of the present disclosure, there is provided a driving device for a display device, including:

The ambient brightness acquisition circuit is used to acquire the ambient brightness;

A picture data acquisition circuit for acquiring picture data, where the picture data includes the grayscale value of each pixel of the image to be displayed;

A picture data correction circuit, connected to the environment brightness acquisition circuit and the picture data acquisition circuit, and configured to perform contrast correction on the picture data according to the ambient brightness to obtain corrected picture data;

The display driving circuit is connected to the screen data correction circuit, and is used for driving the display device to display a screen according to the corrected screen data.

According to a third aspect of the present disclosure, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned driving method of the display device can be realized.

According to a fourth aspect of the present disclosure, there is provided a display device including the above-mentioned driving device or the above-mentioned computer-readable storage medium.

Description of the drawings

The above-mentioned and other features and advantages of the present disclosure will become more apparent by describing the exemplary embodiments thereof in detail with reference to the accompanying drawings.

FIG. 1 is a schematic flowchart of a driving method of a display device according to an embodiment of the present disclosure.

FIG. 2 is a schematic diagram of a process of performing contrast correction on screen data according to an embodiment of the present disclosure.

FIG. 3 is a schematic flowchart of a driving method of a display device according to an embodiment of the present disclosure.

FIG. 4 is a schematic diagram of a correction curve of the maximum brightness value according to an embodiment of the present disclosure.

FIG. 5 is a schematic diagram of a correction curve of the maximum brightness value according to an embodiment of the present disclosure.

FIG. 6 is a schematic diagram of a correction curve of the maximum brightness value according to an embodiment of the present disclosure.

FIG. 7 is a schematic structural diagram of a driving device of a display device according to an embodiment of the present disclosure.

FIG. 8 is a schematic structural diagram of a driving device of a display device according to an embodiment of the present disclosure.

FIG. 9 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.

FIG. 10 is a schematic diagram of the principle of a display device according to an embodiment of the present disclosure.

The reference signs of the main components in the figure are explained as follows:

110. Ambient brightness acquisition circuit; 120. Ambient brightness acquisition circuit; 130. Picture data correction circuit; 140. Display drive circuit; 200. Display panel; 210. Display module; 220. Driver; 230. Backlight module; 231. Backlight control circuit; 232, backlight power supply; 233, backlight assembly; 300, central processing unit; 400, brightness detection assembly; 500, communication module; 600, memory.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the examples set forth herein; on the contrary, the provision of these embodiments makes the present disclosure more comprehensive and complete, and fully conveys the concept of the example embodiments To those skilled in the art. The described features, structures or characteristics may be combined in one or more embodiments in any suitable way. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure.

The described features, structures or characteristics may be combined in one or more embodiments in any suitable way. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, materials, etc. can be used. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical ideas of the present disclosure.

The terms "a", "a", and "the" are used to indicate the presence of one or more elements/components/etc; In addition to the listed elements/components/etc., there may be additional elements/components/etc. The terms "first" and "second" are only used as markers, and are not a restriction on the number of objects.

The present disclosure provides a driving method of a display device. As shown in FIG. 1, the driving method of the display device includes:

Step S110, obtain the ambient brightness;

Step S120, acquiring picture data, where the picture data includes the grayscale value of each pixel of the image to be displayed;

Step S130: Perform contrast correction on the picture data according to the environmental brightness to obtain corrected picture data;

In step S140, the display device is driven to display a screen based on the corrected screen data.

According to the driving method of the display device of the present disclosure, the display device can obtain the environmental brightness and correct the contrast of the screen data according to the environmental brightness, thereby enabling the display screen to have a suitable contrast under different environmental brightness, and improving the adaptability of the display device The ability of different light environments. Especially, when the display device is in an environment where the light environment may change, such as outdoors or in a semi-open lighting environment, the driving method of the display device enables the display device to achieve high contrast under different light environments. Clear display, improve display effect.

Hereinafter, each step, principle and effect of the driving method of the display device of the present disclosure will be further introduced.

The driving method of the display device of the present disclosure is used to improve the display effect of the display device in different light environments, and ensure that the display device can effectively display the information to be displayed in different light environments. The display device can be placed in an occasion where the light environment is easily changed. For example, the display device can be installed outdoors or in a semi-open lighting shopping mall. Of course, the display device can also be installed indoors. Referring to FIG. 9, the display device may be provided with a display panel 200 for displaying images, and a driving device for driving the display panel, and the driving device may use the driving method provided in the present disclosure to drive the display device.

Optionally, referring to FIG. 7, the display device may be provided with an ambient brightness acquisition circuit 110, and the ambient brightness acquisition circuit 110 can acquire the ambient brightness. The environmental brightness obtaining circuit 110 can obtain the environmental brightness according to the detection of the environmental brightness by the components of the display device itself, or obtain the environmental brightness from outside the display device through wired or wireless communication.

For example, as shown in FIG. 8, the display device may be provided with a brightness detection component 400 that detects the ambient brightness, and the brightness detection component 400 is electrically connected to the ambient brightness acquisition circuit 110. Optionally, the brightness detection component 400 may include a photoelectric conversion device (for example, a photodiode) or a photoresistor to realize the conversion of light signals in the environment into electrical signals. In an embodiment of the present disclosure, the brightness detection component 400 can generate a detection electrical signal in response to the light in the environment, and determine the environmental brightness according to the detection electrical signal, and output the determined environmental brightness to the environment brightness acquisition Circuit 110. In another embodiment of the present disclosure, the brightness detection component 400 may generate a detection electrical signal in response to the light in the environment, and output the detection electrical signal to the environment brightness acquisition circuit 110, and the environment brightness acquisition circuit 110 may respond to the detection The electrical signal determines the brightness of the environment.

In an embodiment of the present disclosure, the obtained ambient brightness L _c may be a digital signal, and its unit may be nit (nits).

In an embodiment of the present disclosure, the ambient brightness acquisition circuit 110 may be a PLC (printed circuit board), an MCU (microprocessor), a CPU (central processing unit) or other circuits, or may be a part of the circuit of the PLC, the MCU Part of the circuit or part of the circuit of the CPU. For example, referring to FIG. 10, the display device may be provided with a central processing 300, and the ambient brightness obtaining circuit 110 is a part of the central processing 300.

Optionally, referring to FIG. 7, the display device may be provided with a picture data acquisition circuit 120, and the picture data acquisition circuit 120 may acquire picture data. The screen data obtaining circuit 120 may obtain screen data from the memory of the display device itself, or obtain screen data from outside the display device through wired or wireless communication.

In an embodiment of the present disclosure, as shown in FIG. 8, the display device may be provided with a memory 600 storing screen data, and the memory 600 may store screen data; the memory 600 may communicate with the screen data acquisition circuit 120 The ground is electrically connected, so that the picture data acquisition circuit 120 can acquire picture data from the memory 600. Optionally, the memory 600 may be DDR (Double Rate Synchronous Dynamic Random Access Memory).

In an embodiment of the present disclosure, the screen data acquisition circuit 120 may be a PLC (printed circuit board), an MCU (microprocessor), a CPU (central processing unit) or other circuits, or may be a part of a PLC or MCU. Part of the circuit or part of the circuit of the CPU. For example, as shown in FIG. 10, the display device may be provided with a central processing unit 300, and the screen data acquisition circuit 120 is a part of the central processing unit 300.

It is understandable that the method for driving the display device provided in the present disclosure can either perform step S110 and step S120 sequentially, or perform step S120 and step S110 sequentially, or perform step S110 and step S120 at the same time. This is not limited.

Optionally, as shown in FIG. 2, step S130 may be implemented by the following method:

Step S210: Determine the maximum grayscale value in the picture data according to the picture data;

In step S220, the maximum grayscale value is corrected according to the size of the environmental brightness to obtain the corrected maximum grayscale value;

Step S230: According to the corrected maximum grayscale value, the grayscale value of each pixel of the image to be displayed is corrected to obtain the corrected grayscale value of each pixel of the image to be displayed.

In step S210, the maximum gray-scale value among all gray-scale values can be obtained according to the gray-scale value of each pixel of the image to be displayed in the picture data.

In step S220, different methods can be used to correct the maximum grayscale value according to the different environmental brightness, so as to obtain the corrected maximum grayscale value suitable for different environmental brightness, so that the obtained corrected picture data can adapt to different The ambient brightness. Optionally, the possible ambient brightness can be divided into different preset ranges; when the ambient brightness is within different preset ranges, the method of correcting the maximum grayscale value can be different. Preferably, the ambient brightness can be divided into three different preset ranges. The first preset range may correspond to the ambient brightness in a dark environment such as evening, dawn, or rainy weather, and the second preset range may correspond to common For the ambient brightness of an outdoor environment, the third preset range may be the ambient brightness corresponding to a strong light environment such as a sunny day.

In an embodiment of the present disclosure, in step S220, it can be determined whether the environment brightness L _c is less than the first brightness threshold L ₁ ; if the environment brightness L _{c is} less than the first brightness threshold L ₁ , then according to the following first correction formula Correct the maximum gray scale value:

Among them, _G'max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₁ is the first threshold gray scale, G ₁₂ is the second threshold gray scale, G ₂₁ is the first reference gray scale, and G ₂₂ is The second reference gray scale.

Optionally, the first brightness threshold L ₁ may be 400-600 nits, preferably 500 nits. In this way, when the ambient brightness L _{c is} less than the first brightness threshold L ₁ , the ambient brightness L _{c is} within the first preset range, and the ambient light is insufficient.

Optionally, _{the magnitudes of G 11} , G ₁₂ , G ₂₁ , G ₂₂ and the like can be obtained through computer simulation or statistics of experimental data. It can be understood that when the pixel format adopted by the picture data is different, for example, when the 8-bit format is adopted or the 10-bit format is adopted, the values of G ₁₁ , G ₁₂ , G ₂₁ , and G ₂₂ may be changed.

Optionally, when any pixel of the image to be displayed in the picture data adopts the 8-bit format, the maximum grayscale value of any pixel of the image to be displayed is 255, and the minimum value is 0, G ₁₁ , G ₁₂ , G ₂₁ , G _22, etc. can all be between 0 and 255. Preferably, 56≤G ₁₁ ≤72; 180≤G ₁₂ ≤220; 180≤G ₂₁ ≤220; 32≤G ₂₂ ≤48. Further preferably, G ₁₁ is 64; G ₁₂ is 200; G ₂₁ is 200; G ₂₂ is 40.

When the ambient brightness satisfies the first preset range, that is, when the display device is in a low-light environment, the first correction formula is used to correct the maximum grayscale value, which helps to compress the contrast of the displayed picture, thereby improving display effect.

For example, referring to the correction curve shown in FIG. 4, when the first brightness threshold L ₁ <500 nits, the following formula can be used to correct the maximum gray scale value:

In an embodiment of the present disclosure, in step S220, it can be determined whether the environmental brightness L _c is greater than the second brightness threshold L ₂ ; if the environmental brightness L _{c is} greater than the second brightness threshold L ₂ , the following third correction formula Correct the maximum gray scale value:

Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₃ is the third threshold gray scale, G ₁₄ is the fourth threshold gray scale, G ₂₃ is the third reference gray scale, and G ₂₄ is The fourth reference gray scale.

Optionally, the second brightness threshold L ₁ may be 8000 to 12000 nits, preferably 10000 nits. In this way, when the ambient brightness L _{c is} greater than the second brightness threshold L ₂ , the ambient brightness L _{c is} within the third preset range, and the ambient light is sufficient.

Optionally, _{the magnitudes of G 13} , G ₁₄ , G ₂₃ , G ₂₄ and the like can be obtained through computer simulation or statistics of experimental data. It is understandable that when the pixel format adopted by the picture data is different, for example, when the 8-bit format or the 10-bit format is adopted, the values of G ₁₃ , G ₁₄ , G ₂₃ , and G ₂₄ may be changed.

Optionally, when any pixel of the image to be displayed in the picture data adopts the 8-bit format, the maximum grayscale value of any pixel of the image to be displayed is 255, and the minimum value is 0, G ₁₃ , G ₁₄ , G ₂₃ , G _24, etc. can all be between 0 and 255. Preferably, 56≤G ₁₃ ≤72; 180≤G ₁₄ ≤220; 240≤G ₂₃ ≤255; 0≤G ₂₄ ≤10. Further preferably, G ₁₃ is 64; G ₁₄ is 200; G ₂₃ is 255; G ₂₄ is 5.

When the environmental brightness meets the third preset range, that is, when the display device is in a well-lit environment, the formula is used to correct the maximum grayscale value, which helps to stretch the contrast of the displayed picture by a large margin. In turn, the display effect is improved.

For example, referring to the correction mapping curve shown in Figure 5, when the ambient brightness L _{c is} greater than 10000, the following correction formula can be used to correct the maximum gray scale value:

In an embodiment of the present disclosure, in step S220, it can be determined whether the environmental brightness L _c is between the first brightness threshold L ₁ and the second brightness threshold L ₂ ; if L ₁ ≤ L _c ≤ L ₂ , then Correct the maximum gray scale value according to the following second correction formula:

Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₅ is the fifth threshold gray scale, G ₁₆ is the sixth threshold gray scale, G ₂₅ is the fifth reference gray scale, and G ₂₆ is The sixth reference gray scale.

When the ambient brightness L _{c is} between the first brightness threshold L ₁ and the second brightness threshold L ₂ , the ambient brightness L _{c is} within the second preset range, and the ambient light is normal.

Optionally, _{the magnitudes of G 15} , G ₁₆ , G ₂₅ , G ₂₆ and the like can be obtained through computer simulation or statistics of experimental data. It is understandable that when the pixel format adopted by the picture data is different, for example, when the 8-bit format is adopted or the 10-bit format is adopted, the values of G ₁₅ , G ₁₆ , G ₂₅ , and G ₂₆ may be changed.

Optionally, when any pixel of the image to be displayed in the picture data adopts the 8-bit format, the maximum grayscale value of any pixel of the image to be displayed is 255, and the minimum value is 0, G ₁₅ , G ₁₆ , G ₂₅ , G _26, etc. can all be between 0 and 255. Preferably, 112≤G ₁₅ ≤144; 240≤G ₁₆ ≤255; 240≤G ₂₅ ≤255; 0≤G ₂₆ ≤10. Further preferably, G ₁₅ is 128; G ₁₆ is 250; G ₂₅ is 255; G ₂₆ is 5.

When the ambient brightness satisfies the second preset range, that is, when the display device is in a normal light environment, the formula is used to correct the maximum grayscale value, which helps to stretch the contrast of the displayed picture, thereby improving the display effect .

For example, referring to Figure 6, when 500 nits ≤ L _c ≤ 10000 nits, the following correction formula can be used to correct the maximum gray scale value:

In an embodiment of the present disclosure, in step S220, it is possible to determine whether the environmental brightness belongs to the first preset range, the second preset range, and the third preset range one by one; when the environmental brightness does not meet a certain preset range When the maximum grayscale value is not corrected according to the correction formula corresponding to the preset range; when the ambient brightness meets a certain preset range, the maximum grayscale value is corrected according to the correction formula corresponding to the preset range.

In another embodiment of the present disclosure, in step S220, it is possible to first determine whether the environmental brightness meets two of the preset ranges, for example, determine whether the environmental brightness meets the first preset range and the third preset range; if If the environmental brightness does not meet the first preset range and the third preset range, it is determined that the environmental brightness meets the second preset range.

For example, referring to Fig. 3, it can be judged whether the environmental brightness meets the third preset range first, if it meets (yes), then the maximum grayscale value is corrected according to the third correction formula; if it is not satisfied (no), then it is judged Whether the environmental brightness meets the first preset range; if it is satisfied (Yes), the maximum grayscale value is corrected according to the first correction formula; if it is not satisfied (No), it is judged that the environmental brightness meets the second preset range, according to the first The second correction formula corrects the maximum gray scale value.

In step S230, the grayscale value of each pixel of the image to be displayed may be corrected according to the corrected maximum grayscale value to obtain the corrected grayscale value of each pixel of the image to be displayed.

Optionally, the corrected grayscale value of any pixel of the image to be displayed can be obtained according to the following formula:

Among them, G′ _{(x, y)} is the corrected grayscale value _{of the pixel P (x, y)} in the x-th row and y-th column of the image _{to be displayed, and G (x, y)} is the x-th row, The gray scale value of the pixel P _{(x, y) in the yth column, G′ max} is the corrected maximum gray scale value, and G is the maximum gray scale value that the display device can display. Round() means rounding, for example, Round(4.3)=4, Round(4.5)=5. In this way, the obtained G′ _{(x, y)} is an integer and not greater than G.

It can be understood that G is different according to the pixel format of the image data. For example, when the pixel format of the image data is 8-bit, G=2 ⁸ -1=255; when the pixel format of the image data is 10-bit, G=2 ¹⁰ -1=1023.

In step S230, the corrected grayscale value of each pixel of the image to be displayed can be obtained, and the corrected grayscale value of each pixel of the image to be displayed composes the corrected image data. When in step S140, when the display device is driven to display a screen according to the corrected screen data, the display screen has a contrast that matches the brightness of the environment, thereby improving the display effect of the display device.

Optionally, as shown in FIG. 7, the display device may be provided with a picture data correction circuit 130. The picture data correction circuit 130 is connected to the environment brightness acquisition circuit 110 and the picture data acquisition circuit 120 for performing contrast correction on the picture data according to the ambient brightness. To obtain the corrected screen data. Preferably, the screen data correction circuit 130 may be configured to implement steps S210 to S230.

In an embodiment of the present disclosure, the picture data correction circuit 130 may include a maximum gray scale value acquisition sub-circuit, a maximum gray scale value correction sub-circuit, and a pixel gray scale value correction sub-circuit. Wherein, the maximum grayscale value obtaining sub-circuit can be connected to the picture data obtaining circuit 120 to obtain the grayscale value of each pixel of the image to be displayed, and obtain the maximum grayscale value according to the grayscale value of each pixel of the image to be displayed, namely Step S210 is executed. The maximum gray-scale value correction sub-circuit can be electrically connected to the maximum gray-scale value acquisition sub-circuit and the ambient brightness acquisition circuit 110 to obtain the ambient brightness and the maximum gray-scale value, and to correct the maximum gray-scale value according to the size of the ambient brightness , Obtain the corrected maximum grayscale value, that is, execute step S220. The pixel gray-scale value correction sub-circuit can be electrically connected to the screen data acquisition circuit 120 and the maximum gray-scale value correction sub-circuit for acquiring screen data and correcting the maximum gray-scale value, and according to the corrected maximum gray-scale value, each of the images to be displayed The grayscale value of the pixel is corrected to obtain the corrected grayscale value of each pixel of the image to be displayed, that is, step S230 is executed.

In an embodiment of the present disclosure, the screen data correction circuit 130 may be a PLC (printed circuit board), an MCU (microprocessor), a CPU (central processing unit) or other circuits, or may be a part of a PLC or MCU. Part of the circuit or part of the circuit of the CPU. For example, as shown in FIG. 10, the display device may be provided with a central processing unit 300, and the screen data correction circuit 130 is a part of the central processing unit 300.

In step S140, the display device is driven to display a screen based on the corrected screen data. Optionally, as shown in FIG. 7, the display device may be provided with a display driving circuit 140, and the display driving circuit 140 is connected to the screen data correction circuit 130 for driving the display panel to display images according to the corrected screen data. Optionally, referring to FIG. 10, the display panel 200 may include a display module 210 and a driver 220 for driving the display module 210. The driver 220 is provided with a timing controller, a source driver, and a gate driver; the display driving circuit 140 may combine The corrected image data is transmitted to the timing controller, and the timing controller controls the source driver and the gate driver after processing the corrected image data, so that the display module 210 displays the image.

Optionally, the driving method of the display device provided in the present disclosure may further include:

Step S150: Adjust the light emission brightness of the light source of the display device according to the environmental brightness. Optionally, the mapping relationship between the environmental brightness and the light-emitting brightness of the light source can be set, and the light-emitting brightness of the light source of the display device can be determined and adjusted according to the obtained environmental brightness. In an embodiment of the present disclosure, multiple ambient brightness intervals may be set, and each ambient brightness interval corresponds to the luminous brightness of a light source. In this way, when the environmental brightness changes within the same brightness interval, the light emission brightness of the light source can be unchanged; when the environment brightness changes within different brightness intervals, the light emission brightness of the light source can be changed.

Optionally, when the brightness of the environment increases, the maximum brightness of the display device can be increased by adjusting the brightness of the light source of the display device; when the brightness of the environment decreases, the brightness of the light source of the display device can be adjusted to make the The maximum brightness is reduced.

According to different types of display panels, different methods can be used to adjust the brightness of the light source of the display device. For example, when the display panel is an LCD (liquid crystal display device), the display panel includes a display module and a backlight assembly. The backlight assembly is used to provide backlight to the display module; the display device can be adjusted by adjusting the brightness of the backlight assembly The brightness of the light source. In the scene of high ambient brightness, the brightness of the backlight assembly can be adjusted to make the display device have a higher maximum brightness, thereby improving the clarity of the display screen in a sufficiently light environment; conversely, in the scene of low ambient brightness, The light-emitting brightness of the backlight assembly can be reduced, so that the display device has a smaller maximum brightness, thereby improving the clarity of the display screen in a low-light environment. For another example, when the display panel is an active light-emitting display panel such as OLED (Organic Light Emitting Diode), LED (Light Emitting Diode), etc., the maximum brightness parameter can be transmitted to the driver of the display panel, and the driver can drive the display panel according to the maximum brightness parameter. Adjust the maximum brightness displayed.

Preferably, the display device may be provided with a brightness adjustment circuit, which can adjust the luminous brightness of the light source of the display device according to the brightness of the environment. When the display device is an LCD display device, the brightness adjustment circuit can be connected to the backlight assembly to adjust the brightness of the backlight assembly.

In an embodiment of the present disclosure, the brightness adjustment circuit may be a PLC (printed circuit board), MCU (microprocessor), CPU (central processing unit) or other circuits, or may be a part of a PLC or a part of an MCU. Circuit or part of the circuit of the CPU. For example, the display device may be provided with a central processing unit, and the brightness adjustment circuit is a part of the central processing unit.

In the driving method of the display device provided by the present disclosure, the contrast of the display screen can be adjusted according to the difference of the environmental brightness, so as to achieve the effect of display enhancement. Not only that, in some embodiments, the maximum brightness of the display screen can also be adjusted according to the different brightness of the environment to adapt to different light environments, and further improve the clarity of the display screen, especially to more clearly improve the contrast of the screen. The sharpness of the dark and light parts. For example, in an environment with high environmental brightness, the driving method of the present disclosure can increase the maximum brightness of the display device, but the contrast of the pure black and pure white of the screen is reduced, which affects the screen effect; the driving method of the present disclosure can be based on the environment Brightness stretches the contrast of the displayed picture, which can increase the contrast of the picture. In this way, the driving method of the present disclosure can simultaneously increase the maximum brightness of the display device and stretch the contrast of the screen, and can achieve a clearer display effect. For another example, in an environment with low ambient brightness, the driving method of the present disclosure can reduce the maximum brightness of the display device, and compress the contrast of the display screen according to the ambient brightness, avoid distortion caused by excessive pixel contrast, and ensure the display The device does not distort the picture under low brightness, improving the clarity of the picture. In this way, the driving method of the present disclosure can reduce the maximum brightness of the display device and compress the contrast of the screen at the same time, and can achieve a clearer display effect.

It should be noted that although the various steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be performed in the specific order, or that all the steps shown must be performed. Achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step to be executed, and/or one step may be decomposed into multiple steps to be executed, etc., all should be regarded as a part of the present disclosure.

The present disclosure also provides a driving device of a display device. As shown in FIG. 7, the driving device of the display device includes:

The ambient brightness acquisition circuit 110 is used to acquire the ambient brightness;

The picture data acquisition circuit 120 is used to acquire picture data, and the picture data includes the grayscale value of each pixel of the image to be displayed;

The picture data correction circuit 130 is connected to the environment brightness acquisition circuit 110 and the picture data acquisition circuit 120, and is used to perform contrast correction on the picture data according to the ambient brightness to obtain the corrected picture data;

The display driving circuit 140 is connected to the screen data correction circuit 130, and is used to drive the display device to display a screen according to the corrected screen data.

Preferably, the driving device of the display device may further include a brightness adjustment circuit, which is used to adjust the light emission brightness of the light source of the display device according to the environmental brightness.

Preferably, the driving device of the display device provided in the present disclosure may be a microprocessor (MCU) or a central processing unit (CPU).

The details, principles and effects of the driving device of the display device provided in the present disclosure are described in detail in the above-mentioned driving method embodiment of the display device, or can be reasonably derived from the description in the above-mentioned driving method embodiment of the display device , This disclosure will not be repeated here.

The present disclosure also provides a computer-readable storage medium that stores a computer program, and when the computer program is executed by a processor, it can implement the driving method of the display device described in the above-mentioned driving method of the display device.

The program product for implementing the above method according to the embodiment of the present disclosure may adopt a portable compact disk read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited to this. In this document, the readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or combined with an instruction execution system, device, or device.

The program product can adopt any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or a combination of any of the above. More specific examples (non-exhaustive list) of readable storage media include: electrical connections with one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable Type programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

The readable signal medium may include a data signal propagated in baseband or as a part of a carrier wave, and readable program code is carried therein. This propagated data signal can take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. The readable signal medium may also be any readable medium other than a readable storage medium, and the readable medium may send, propagate, or transmit a program for use by or in combination with the instruction execution system, apparatus, or device.

The program code contained on the readable medium can be transmitted by any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

The program code used to perform the operations of the present invention can be written in any combination of one or more programming languages. Programming languages include object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural programming. Language-such as "C" language or similar programming language. The program code can be executed entirely on the user's computing device, partly on the user's device, executed as an independent software package, partly on the user's computing device and partly executed on the remote computing device, or entirely on the remote computing device or server Executed on. In the case of a remote computing device, the remote computing device can be connected to a user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (for example, using Internet service providers). Business to connect via the Internet).

The embodiments of the present disclosure also provide a display device, which includes any one of the drive devices of the display device described in the above embodiment of the drive device of the display device, or may include any one of the drive devices described in the above computer-readable storage medium. A computer-readable storage medium. The display device may be an outdoor advertising screen, an exhibition display screen, etc., which is not limited in the present disclosure. The display device can adjust the contrast of the display screen according to the change of the environmental brightness to realize a clear display.

Hereinafter, a specific implementation of the display device is given as an example to further explain and describe the principle, structure, and effect of the display device of the present disclosure.

As shown in Figures 9 and 10, the exemplary display device is an outdoor electronic advertising screen. The outdoor electronic advertising screen may include a display panel 200, a brightness detection component 400, a central processing unit 300, a memory 600, a communication module 500, and a power supply. Module (not shown). Among them, the power supply module is used to supply power to the display panel, the brightness detection component 400, the central processing unit 300, the memory 600, and the communication module 500. The communication module 500 is connected to the central processing unit 300 so that the outdoor electronic advertising screen can communicate with the outside, for example, can be connected to the Internet; optionally, the communication module 500 can be a WiFi module. The memory 600 is connected to the central processing unit 300 and is used to store picture data. The picture data includes the grayscale value of each pixel of the image to be displayed; alternatively, the memory 600 may be a DDR. The brightness detection module 400 may be connected to the central processing unit 300 to detect the ambient brightness and send the ambient brightness to the central processing unit 300; optionally, the brightness detection module 400 may include a photodiode or a photoresistor. The central processing unit 300 is configured to obtain the environmental brightness and obtain the screen data, perform contrast correction on the screen data according to the environmental brightness to obtain the corrected screen data, and transmit the corrected screen data to the display panel 200 to drive the display device to display the screen; processing; The device can also be configured to output a backlight control signal according to the ambient brightness.

The display panel includes a driver 220, a display module 210, and a backlight module 230; the display module may be a 4K LCD display module. The driver 220 is used to receive the corrected screen data sent by the central processing unit 300, and drive the display module 210 to display the screen according to the corrected screen data. The backlight module 230 includes a backlight control circuit 231, a backlight power supply 232, and a backlight assembly 233 connected in sequence. The backlight control circuit 231 is connected to the central processing unit 300 and can control the backlight power supply 232 under the control of the backlight control signal to control the backlight assembly The luminous brightness of 233 controls the maximum brightness of the outdoor electronic advertising screen.

Optionally, the driver may also be provided with an interface conversion circuit for converting the corrected picture data from an HDMI (High Definition Multimedia Interface) interface to a VBO (V-By-One) interface.

In this way, the outdoor electronic advertising screen provided by the present disclosure can detect the brightness of the environment, and adjust the brightness of the backlight module and the contrast of the screen according to the brightness of the environment, so that the screen can be displayed clearly under different light conditions, and the display effect is improved. Information promotion efficiency.

It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of components proposed in this specification. The present disclosure can have other embodiments, and can be implemented and executed in various ways. The aforementioned deformations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or obvious in the text and/or drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments of the present specification illustrate the best way known for implementing the present disclosure, and will enable those skilled in the art to utilize the present disclosure.

Claims (12)

1. A driving method of a display device includes:

   Get the ambient brightness;

   Acquiring picture data, where the picture data includes the grayscale value of each pixel of the image to be displayed;

   Performing contrast correction on the picture data according to the environmental brightness to obtain corrected picture data;

   According to the corrected screen data, the display device is driven to display a screen.
2. The driving method of the display device according to claim 1, wherein, according to the environmental brightness, performing contrast correction on the picture data to obtain the corrected picture data comprises:

   Determining the maximum grayscale value in the picture data according to the picture data;

   Correcting the maximum grayscale value according to the magnitude of the environmental brightness to obtain the corrected maximum grayscale value;

   According to the corrected maximum grayscale value, the grayscale value of each pixel of the image to be displayed is corrected to obtain the corrected grayscale value of each pixel of the image to be displayed.
3. 3. The driving method of the display device according to claim 2, wherein the correcting the maximum gray scale value according to the magnitude of the environmental brightness to obtain the corrected maximum gray scale value comprises:

   Judging whether the environmental brightness is less than a first brightness threshold;

   In response to the environmental brightness being less than the first brightness threshold, the maximum grayscale value is corrected according to the following formula:

   

   Wherein, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₁ is the first threshold gray scale, G ₁₂ is the second threshold gray scale, G ₂₁ is the first reference gray scale, and G ₂₂ is the second reference gray scale.
4. 3. The driving method of the display device according to claim 2, wherein the correcting the maximum gray scale value according to the magnitude of the environmental brightness to obtain the corrected maximum gray scale value comprises:

   Judging whether the environmental brightness is greater than a second brightness threshold;

   In response to the environmental brightness being greater than the second brightness threshold, the maximum grayscale value is corrected according to the following formula:

   

   Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₃ is the third threshold gray scale, G ₁₄ is the fourth threshold gray scale, G ₂₃ is the third reference gray scale, and G ₂₄ is the fourth reference gray scale.
5. 3. The driving method of the display device according to claim 2, wherein the correcting the maximum gray scale value according to the magnitude of the environmental brightness to obtain the corrected maximum gray scale value comprises:

   Judging whether the environmental brightness is between the first brightness threshold and the second brightness threshold;

   In response to L ₁ ≤L _c ≤L ₂ , the maximum gray scale value is corrected according to the following formula:

   

   Wherein, L ₁ is the first brightness threshold, L _c is the ambient brightness, L ₂ is the second brightness threshold, _G'max is the corrected maximum gray scale value, G _max is the maximum gray scale value, and G ₁₅ is the first brightness threshold. Five-threshold gray scale, G ₁₆ is the sixth threshold gray scale, G ₂₅ is the fifth reference gray scale, and G ₂₆ is the sixth reference gray scale.
6. 4. The driving method of the display device according to claim 2, wherein the maximum gray scale value that the display device can display is 255;

   According to the magnitude of the environmental brightness, correcting the maximum grayscale value to obtain the corrected maximum grayscale value includes:

   Determine the magnitude relationship between the environmental brightness and the first brightness threshold and the second brightness threshold;

   In response to the environmental brightness being less than the first brightness threshold, the maximum grayscale value is corrected according to the following formula:

   

   Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₁ is the first threshold gray scale, and 56≤G ₁₁ ≤72; G ₁₂ is the second threshold gray scale, and 180 ≤G ₁₂ ≤220; G ₂₁ is the first reference gray scale, and 180≤G ₂₁ ≤220; G ₂₂ is the second reference gray scale, and 32≤G ₂₂ ≤48;

   In response to the environmental brightness being greater than the second brightness threshold, the maximum grayscale value is corrected according to the following formula:

   

   Among them, G′ _max is the corrected maximum gray scale value, G _max is the maximum gray scale value, G ₁₃ is the third threshold gray scale, and 56≤G ₁₃ ≤72; G ₁₄ is the fourth threshold gray scale, and 180 ≤G ₁₄ ≤220; G ₂₃ is the third reference gray scale, and 240≤G ₂₃ ≤255; G ₂₄ is the fourth reference gray scale, and 0≤G ₂₄ ≤10;

   In response to L ₁ ≤L _c ≤L ₂ , the maximum gray scale value is corrected according to the following formula:

   

   Wherein, L ₁ is the first brightness threshold, L _c is the ambient brightness, L ₂ is the second brightness threshold, _G'max is the corrected maximum gray scale value, G _max is the maximum gray scale value, and G ₁₅ is the first brightness threshold. Five-threshold grayscale, and 112≤G ₁₅ ≤144; G ₁₆ is the sixth threshold grayscale, and 240≤G ₁₆ ≤255; G ₂₅ is the fifth reference grayscale, and 240≤G ₂₅ ≤255; G ₂₆ is The sixth reference gray scale, and 0≤G ₂₆ ≤10.
7. 7. The method for driving a display device according to any one of claims 2 to 6, wherein the grayscale value of each pixel of the image to be displayed is corrected according to the corrected maximum grayscale value to obtain the value of each pixel of the image to be displayed Corrected grayscale values include:

   Obtain the corrected grayscale value of each pixel of the image to be displayed;

   Among them, the corrected grayscale value of any pixel of the image to be displayed is obtained according to the following formula:

   

   Among them, G′ _{(x, y)} is the corrected grayscale value _{of the pixel P (x, y)} in the x-th row and y-th column of the image _{to be displayed, and G (x, y)} is the x-th row, The gray scale value of the pixel P _{(x, y) in the y-th column, G'max} is the corrected maximum gray scale value, and G is the maximum gray scale value that the display device can display; wherein, the round(n) function indicates that n Round up to the nearest whole number.
8. The driving method of the display device according to claim 1, wherein the driving method of the display device further comprises:

   According to the environmental brightness, the light emission brightness of the light source of the display device is adjusted.
9. 8. The method for driving a display device according to claim 8, wherein the display device is a liquid crystal display device; and adjusting the brightness of the light source of the display device comprises:

   Adjust the brightness of the backlight assembly of the display device.
10. A driving device of a display device includes:

    The ambient brightness acquisition circuit is used to acquire the ambient brightness;

    A picture data acquisition circuit for acquiring picture data, where the picture data includes the grayscale value of each pixel of the image to be displayed;

    A picture data correction circuit, connected to the environment brightness acquisition circuit and the picture data acquisition circuit, and configured to perform contrast correction on the picture data according to the ambient brightness to obtain corrected picture data;

    The display driving circuit is connected to the screen data correction circuit, and is used for driving the display device to display a screen according to the corrected screen data.
11. A computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it can realize the driving method of the display device according to any one of claims 1-9.
12. A display device comprising the driving device according to claim 10 or the computer-readable storage medium according to claim 11.

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