Display brightness adjustment method, apparatus, device, and medium

Abstract

The application provides a display brightness adjustment method, device, equipment and medium. In the method, after an initial gray scale corresponding to a pixel point is obtained, the initial gray scale is converted into a target gray scale according to a preset gray scale conversion table that can convert the initial gray scale in a wide value range into the target gray scale in a narrow value range, and then the target transmittance of the liquid crystal panel at the pixel point is obtained according to the target gray scale, and then the target driving voltage is obtained according to the target transmittance, and the liquid crystal molecules are controlled to operate according to the target driving voltage. According to the scheme, the initial gray scale in the wide value range is converted into the target gray scale in the narrow value range, so that the difference span of the target gray scale in the previous frame image and the target gray scale in the current frame image is small, the liquid crystal response time is reduced, the generation of the tailing phenomenon is reduced, and the display effect is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display brightness adjustment method, apparatus, device, and medium. Background Technology

[0002] With the rapid development of technology, display devices have evolved from the original cathode ray tube (CRT) display devices to today's liquid crystal display devices.

[0003] In existing technologies, when displaying images in a liquid crystal display device, the transmittance of each pixel is determined based on the received grayscale level. This transmittance is then used to control the rotation of liquid crystal molecules to the corresponding position. Different rotation positions correspond to different transmittances, thus achieving brightness adjustment. The rotation time of the liquid crystal molecules is also called the liquid crystal response time. For a single pixel, the greater the difference in grayscale between the previous frame and the current frame, the longer the liquid crystal response time. When receiving the grayscale level corresponding to the current frame, the pixel will still display the brightness from the previous frame, resulting in a trailing phenomenon.

[0004] In summary, existing display brightness adjustment methods result in longer liquid crystal response times and trailing artifacts when the grayscale difference between the previous and current frames is greater, leading to poor display quality. Summary of the Invention

[0005] This application provides a display brightness adjustment method, apparatus, device, and medium to solve the problem that existing display brightness adjustment methods suffer from poor display effects due to longer liquid crystal response times and trailing phenomena when the grayscale difference between the previous and current frame images is greater.

[0006] In a first aspect, embodiments of this application provide a display brightness adjustment method, including:

[0007] For each pixel on the LCD panel, a target gray level is determined based on the initial gray level and the preset gray level conversion table corresponding to the pixel in the current frame image. The value range of the target gray level in the preset gray level conversion table is smaller than the value range of the initial gray level in the preset gray level conversion table.

[0008] Based on the target grayscale and the preset gamma curve, the target transmittance of the liquid crystal panel at the pixel is determined, and the gamma curve is the curve showing the correspondence between grayscale and transmittance.

[0009] Based on the relationship between transmittance and driving voltage and the target transmittance, the target driving voltage of the liquid crystal molecules corresponding to the pixel is determined.

[0010] The liquid crystal molecules in the liquid crystal display device are controlled to operate according to the target driving voltage.

[0011] In one specific embodiment, after determining the target driving voltage based on the target transmittance and the correspondence between transmittance and driving voltage, the method further includes:

[0012] Determine the target backlight brightness;

[0013] The backlight module corresponding to the pixel in the liquid crystal display device is controlled to operate according to the target backlight brightness.

[0014] In one specific implementation, determining the target backlight brightness includes:

[0015] Based on the initial grayscale, the preset gamma curve, and the target transmittance, determine the transmittance ratio between the transmittance corresponding to the initial grayscale and the target transmittance;

[0016] The target backlight brightness is determined by multiplying the light transmittance ratio and the preset base backlight brightness.

[0017] In one specific implementation, determining the target backlight brightness includes:

[0018] Determine the grayscale ratio between the initial grayscale and the target grayscale;

[0019] The target backlight brightness is determined by multiplying the grayscale ratio and the preset base backlight brightness.

[0020] In one specific embodiment, before determining the target driving voltage based on the correspondence between transmittance and driving voltage and the target transmittance, the method further includes:

[0021] Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve;

[0022] The target transmittance is determined based on the initial grayscale and the target gamma curve.

[0023] Secondly, embodiments of this application provide a display brightness adjustment device, comprising:

[0024] Processing module, used for:

[0025] For each pixel on the LCD panel, the target gray level is determined based on the initial gray level and the preset gray level conversion table corresponding to the pixel in the current frame image obtained by the acquisition module. The value range of the target gray level in the preset gray level conversion table is smaller than the value range of the initial gray level in the preset gray level conversion table.

[0026] Based on the target grayscale and the preset gamma curve, the target transmittance of the liquid crystal panel at the pixel is determined, and the gamma curve is the curve showing the correspondence between grayscale and transmittance.

[0027] Based on the relationship between transmittance and driving voltage and the target transmittance, the target driving voltage of the liquid crystal molecules corresponding to the pixel is determined.

[0028] A control module is used to control the liquid crystal molecules in the liquid crystal display device to operate according to the target driving voltage.

[0029] In one specific embodiment, the processing module is further configured to:

[0030] Determine the target backlight brightness;

[0031] Control the backlight module corresponding to the pixel in the liquid crystal display device to operate according to the target backlight brightness;

[0032] Based on the initial grayscale, the preset gamma curve, and the target transmittance, determine the transmittance ratio between the transmittance corresponding to the initial grayscale and the target transmittance;

[0033] The target backlight brightness is determined by multiplying the light transmittance ratio and the preset base backlight brightness.

[0034] Determine the grayscale ratio between the initial grayscale and the target grayscale;

[0035] The target backlight brightness is determined by multiplying the grayscale ratio and the preset base backlight brightness.

[0036] Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve;

[0037] The target transmittance is determined based on the initial grayscale and the target gamma curve.

[0038] Thirdly, embodiments of this application provide a liquid crystal display device, including:

[0039] Processor, memory, communication interface, liquid crystal display;

[0040] The memory is used to store the executable instructions of the processor;

[0041] The processor is configured to execute the display brightness adjustment method according to any one of the first aspects by executing the executable instructions.

[0042] Fourthly, embodiments of this application provide a readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the display brightness adjustment method described in any of the first aspects.

[0043] Fifthly, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the display brightness adjustment method described in any of the first aspects.

[0044] The display brightness adjustment method, apparatus, device, and medium provided in this application, after obtaining the initial grayscale corresponding to a pixel, converts the initial grayscale to the target grayscale according to a preset grayscale conversion table that can convert the initial grayscale within a wide range to the target grayscale within a narrow range. Then, based on the target grayscale, the target transmittance of the liquid crystal panel at the pixel is obtained, and the target driving voltage is obtained based on the target transmittance, controlling the liquid crystal molecules to operate according to the target driving voltage. This solution, by converting the initial grayscale within a wide range to the target grayscale within a narrow range, reduces the difference between the target grayscale in the previous frame and the target grayscale in the current frame, thereby reducing liquid crystal response time, reducing trailing phenomena, and improving display performance. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A liquid crystal response time diagram from the starting gray level to the ending gray level provided in the embodiments of this application;

[0047] Figure 2a A flowchart illustrating an embodiment of the display brightness adjustment method provided in this application;

[0048] Figure 2b The preset gamma curve provided for the embodiments of this application;

[0049] Figure 3a A flowchart illustrating Embodiment 2 of the display brightness adjustment method provided in this application;

[0050] Figure 3b A comparison diagram of display brightness before and after adjusting the backlight brightness, provided as an embodiment of this application;

[0051] Figure 4a A flowchart illustrating Embodiment 3 of the display brightness adjustment method provided in this application;

[0052] Figure 4b The target gamma curve provided for the embodiments of this application;

[0053] Figure 5 This is a schematic diagram of the structure of an embodiment of the display brightness adjustment device provided in this application;

[0054] Figure 6 This is a schematic diagram of the structure of a liquid crystal display device provided in this application. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments made by those skilled in the art under the guidance of these embodiments are within the scope of protection of this application.

[0056] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] With the development of technology and the improvement of people's living standards, LCD display devices are becoming increasingly popular due to their superior display effects. Adjusting the brightness of LCD display devices is a matter of great concern to people.

[0058] In existing technologies, brightness adjustment is typically achieved by adjusting the rotational position of each liquid crystal molecule based on grayscale levels. Different rotational positions correspond to different light transmittance, thus allowing for different brightness levels to be displayed. However, for a single pixel, the greater the difference between the starting grayscale level in the previous frame and the ending grayscale level in the current frame, the longer the liquid crystal response time, leading to a trailing effect and poor display quality.

[0059] For example, Figure 1 This is a liquid crystal response time diagram from the starting grayscale to the ending grayscale provided in an embodiment of this application. (See attached diagram.) Figure 1 As shown, Figure 1The time unit in the graph is milliseconds. The larger the gap between the starting and ending gray levels, the longer the liquid crystal response time. Empty values ​​in the graph indicate that the liquid crystal response time is too short to be statistically accurate.

[0060] To address the problems existing in the prior art, the inventors, during their research on display brightness adjustment methods, discovered that display brightness can be adjusted by regulating two parameters: transmittance and backlight brightness. Therefore, to reduce the occurrence of ghosting, the rotation angle of the liquid crystal molecules can be controlled within a smaller range. This reduces ghosting, and for better display effects, the backlight brightness is adjusted to keep the display brightness range constant, aligning with human visual perception. To keep the rotation angle of the liquid crystal molecules within a smaller range, after obtaining the initial grayscale, which falls within a relatively wide grayscale range, it is converted into a target grayscale within a narrower range. Then, based on the gamma curve, the transmittance can be obtained, leading to the corresponding driving voltage. Operating according to the driving voltage allows the liquid crystal molecules to rotate to the target position with a smaller rotation angle. Finally, based on the transmittance ratio of the initial grayscale and the target grayscale, and a preset base backlight brightness, the target backlight brightness is obtained. The liquid crystal display device operates according to the target display brightness, achieving a display brightness that conforms to human visual perception. Based on the above inventive concept, the display brightness adjustment scheme of this application was designed.

[0061] The subject executing the brightness adjustment method in this application can be a liquid crystal display device, or a computer, terminal device, or other device that can control the brightness of the liquid crystal display device. This application does not limit it. The following description uses a liquid crystal display device as an example.

[0062] The application scenarios of the display brightness adjustment method provided in the embodiments of this application are described below.

[0063] For example, in this application scenario, a user uses an LCD display device to view the displayed content. In the displayed image, each pixel has a corresponding display brightness.

[0064] When an image is about to switch, the liquid crystal display device can obtain the initial gray level corresponding to each pixel. In order to reduce the liquid crystal response time, the initial gray level in a wide range can be converted into the target gray level in a narrow range according to the preset gray level conversion table.

[0065] For example, the initial grayscale value range is 0-255, and the target grayscale value range is 32-224, which is smaller than the initial grayscale value range. Alternatively, the initial grayscale value range can also be 0-255, and the target grayscale value range can also be 20-230; or the initial grayscale value range can also be 0-1023, and the target grayscale value range can also be 200-900. This application does not limit the initial and target grayscale value ranges; they can be set according to actual conditions.

[0066] The liquid crystal display device then determines the corresponding transmittance based on the target grayscale, thereby obtaining the target driving voltage. By controlling the liquid crystal display device to operate according to the target driving voltage, the transmittance of that pixel can be made to the target transmittance. Because the target grayscale range is small, the rotation angle of the liquid crystal molecules is also small, reducing the liquid crystal response time and minimizing the occurrence of trailing phenomena.

[0067] Furthermore, adjusting the transmittance using the above method does not allow the display brightness to range from complete black to complete bright. Therefore, this can be achieved by adjusting the backlight brightness. The target backlight brightness is determined based on the initial grayscale, preset gamma curve, target transmittance, and preset base backlight brightness, or based on the initial grayscale, target grayscale, and preset base backlight brightness.

[0068] This allows the LCD display device to operate according to the target driving voltage and target backlight brightness, enabling the display brightness range to go from full black to full bright, which is more in line with the user's visual experience.

[0069] It should be noted that the above scenario is only an example of an application scenario provided by the embodiments of this application. The embodiments of this application do not limit the actual form of the various devices included in the scenario. In the specific application of the solution, it can be set according to actual needs.

[0070] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0071] Figure 2a This is a flowchart illustrating a first embodiment of the display brightness adjustment method provided in this application. This embodiment describes how, after acquiring an initial grayscale level from the liquid crystal display device, a target grayscale level is determined according to a preset grayscale conversion table. Then, a target driving voltage is determined based on the target grayscale level, and the liquid crystal display device is controlled to operate according to the target driving voltage to generate display brightness. The method in this embodiment can be implemented through software, hardware, or a combination of both. For example... Figure 2a As shown, the display brightness adjustment method specifically includes the following steps:

[0072] S201: For each pixel on the LCD panel, determine the target gray level based on the initial gray level and preset gray level conversion table corresponding to the pixel in the current frame image.

[0073] In this step, when the liquid crystal display device switches from the previous frame to the current frame, it can acquire the initial grayscale corresponding to each pixel. To reduce the liquid crystal response time, for each pixel, a target grayscale can be determined based on the acquired initial grayscale and a preset grayscale conversion table. The value range of the target grayscale in the preset grayscale conversion table is smaller than the value range of the initial grayscale in the preset grayscale conversion table.

[0074] It should be noted that the preset grayscale conversion table is set in the LCD display device by the functional staff before the implementation of this solution. The user converts the initial grayscale to the target grayscale. The value range of the initial grayscale in the preset grayscale conversion table is the full range of grayscale. Each initial grayscale corresponds to a target grayscale, and the value range of the target grayscale in the preset grayscale conversion table is smaller than the value range of the initial grayscale in the preset grayscale conversion table. This application embodiment does not limit the preset grayscale conversion table or the specific values ​​in the preset grayscale conversion table, and can be set according to the actual situation.

[0075] For example, the initial grayscale value range in the preset grayscale conversion table is 0-255, and the target grayscale value range is 32-224; the initial grayscale value range can also be 0-255, and the target grayscale value range can also be 20-230; the initial grayscale value range can also be 0-1023, and the target grayscale value range can also be 200-900. This application embodiment does not limit the value ranges of the initial grayscale and target grayscale, and they can be set according to actual conditions.

[0076] S202: Determine the target transmittance of the LCD panel at each pixel based on the target grayscale and the preset gamma curve.

[0077] In this step, after the liquid crystal display device determines the target grayscale, the human eye is much more sensitive to brightness in darker environments than to brightness in brighter environments. Therefore, the relationship between human perception and brightness is not linear. For example, increasing the brightness by two times does not necessarily mean the human eye perceives a doubling of brightness; it only perceives a slight increase. However, when the brightness increases by eight times or more, the human eye will perceive a doubling of brightness compared to the original brightness. Therefore, the relationship between transmittance and grayscale is also not linear. To obtain the transmittance of the liquid crystal panel at a specific pixel, the target transmittance can be determined based on the target grayscale and a preset gamma curve. The gamma curve represents the correlation between grayscale and transmittance.

[0078] For example, Figure 2bThe preset gamma curve provided for the embodiments of this application, such as Figure 2b As shown, transmittance and grayscale exhibit a power function relationship. Since the relationship between human visual perception and brightness is not linear, the correspondence between transmittance and grayscale is set as a power function.

[0079] It should be noted that the embodiments of this application do not limit the preset gamma curve, and can be set according to the actual situation.

[0080] S203: Determine the target driving voltage of the liquid crystal molecules corresponding to the pixel based on the correspondence between transmittance and driving voltage and the target transmittance.

[0081] In this step, after determining the transmittance, the liquid crystal display device needs to determine the target driving voltage of the liquid crystal molecules corresponding to the pixel in order to make the liquid crystal molecules rotate, based on the correspondence between transmittance and driving voltage and the target transmittance.

[0082] S204: Controls the liquid crystal molecules in the liquid crystal display device to operate according to the target driving voltage.

[0083] In this step, after determining the target driving voltage, the liquid crystal display device can control the liquid crystal molecules in the device to operate according to the target driving voltage, causing the liquid crystal molecules to rotate. After rotation, the liquid crystal panel can display the target transmittance at that pixel. Because the target grayscale value range is small, the rotation angle of the liquid crystal molecules is reduced, thereby reducing the liquid crystal response time and minimizing the occurrence of trailing phenomena.

[0084] It should be noted that the backlight brightness of the liquid crystal display device during operation can be a preset basic backlight brightness, which can be 400 nits, 500 nits, or 800 nits. This application embodiment does not limit the preset basic backlight brightness and can set it according to the actual situation.

[0085] The display brightness adjustment method provided in this embodiment, after obtaining the initial grayscale, converts it into a target grayscale with a smaller value range, and then obtains the target driving voltage, and operates according to the target driving voltage. Compared with the prior art that determines the driving voltage only based on the initial grayscale, this solution converts the initial grayscale with a wider value range into the target grayscale with a narrower value range, and then determines the target driving voltage. This results in a smaller rotation angle of the liquid crystal molecules, reduces the liquid crystal response time, reduces the trailing phenomenon, and improves the display effect.

[0086] Figure 3aThis is a flowchart illustrating a second embodiment of the display brightness adjustment method provided in this application. Based on the above embodiments, this application describes how, after determining the target driving voltage of the liquid crystal display device, the target backlight brightness is determined according to the initial gray level, the preset gamma curve, the target transmittance, and the preset basic backlight brightness, or according to the initial gray level, the target gray level, and the preset basic backlight brightness.

[0087] like Figure 3a As shown, the display brightness adjustment method specifically includes the following steps:

[0088] S301: Determine the target backlight brightness.

[0089] In this step, if the liquid crystal display device operates solely according to the target driving voltage and the preset base backlight brightness after determining the target driving voltage, the range of display brightness will be reduced; for example, a completely black display brightness cannot be obtained. Therefore, in order to keep the range of display brightness constant, the backlight brightness also needs to be adjusted. This requires determining the target backlight brightness based on the initial grayscale, the preset gamma curve, the target transmittance, and the preset base backlight brightness, or based on the initial grayscale, the target grayscale, and the preset base backlight brightness.

[0090] Specifically, the transmittance ratio between the initial grayscale and the target transmittance can be determined based on the initial grayscale, the preset gamma curve, and the target transmittance. The target backlight brightness is then determined by multiplying this transmittance ratio by the preset base backlight brightness.

[0091] Since the preset gamma curve is a curve showing the relationship between grayscale and transmittance, the transmittance ratio of the initial grayscale to the target transmittance can be obtained. Then, by multiplying this transmittance ratio by the preset base backlight brightness, the target backlight brightness can be obtained.

[0092] For example, the initial grayscale is 0, the target grayscale is 9, the initial grayscale corresponds to 0% transmittance, and the target grayscale corresponds to 0.064% transmittance. At this time, the transmittance ratio is 0%.

[0093] The initial grayscale is 1, and the target grayscale is 9. The transmittance of the initial grayscale is 0.001%, and the transmittance of the target grayscale is 0.064%. At this point, the transmittance ratio is 0.8%.

[0094] The initial grayscale is 12, and the target grayscale is 17. The transmittance corresponding to the initial grayscale is 0.120%, and the transmittance corresponding to the target grayscale is 0.064%. At this point, the transmittance ratio is 46.47%.

[0095] It should be noted that the above example is only an illustration of the process of calculating the transmittance ratio. The embodiments of this application do not limit the initial gray level, target gray level, and transmittance ratio, which can be determined according to the actual situation.

[0096] It should be noted that the preset basic backlight brightness is set by the staff in the LCD display device before the implementation of this solution, and is used to determine the target backlight brightness. The preset basic backlight brightness can be 400 nits, 500 nits, or 800 nits. This application embodiment does not limit the preset basic backlight brightness and can set it according to the actual situation.

[0097] Specifically, the grayscale ratio between the initial grayscale and the target grayscale can be determined, and then the product of the grayscale ratio and the preset base backlight brightness can be determined as the target backlight brightness.

[0098] For example, the initial grayscale is 0, and the target grayscale is 32. At this point, the grayscale ratio is 0%. The initial grayscale is 1, and the target grayscale is 32. At this point, the grayscale ratio is 3.125%. The initial grayscale is 200, and the target grayscale is 182. At this point, the grayscale ratio is 109.89%.

[0099] It should be noted that the above example is only an illustration of the process of calculating the gray level ratio. The embodiments of this application do not limit the initial gray level, target gray level, or gray level ratio, which can be determined according to the actual situation.

[0100] S302: Controls the backlight modules corresponding to the pixels in the liquid crystal display device to operate according to the target backlight brightness.

[0101] In this step, after obtaining the target driving voltage and target backlight brightness, the liquid crystal display device needs to control the backlight modules corresponding to the pixels in the liquid crystal display device to operate according to the target backlight brightness in order to maintain a constant range of display brightness and achieve better display effects. This, in turn, controls the liquid crystal molecules in the liquid crystal display device to operate according to the target driving voltage, thus ensuring a constant range of display brightness.

[0102] For example, Figure 3b This application provides a comparison diagram of display brightness before and after adjusting the backlight brightness, as shown in the embodiments of this application. Figure 3b As shown, with initial gray levels of 0 and 5, the corresponding display brightness is the same before adjusting the backlight brightness. After adjusting the backlight brightness, the display brightness corresponding to the initial gray level of 0 becomes completely black. With initial gray levels of 200 and 255, the corresponding display brightness is the same before adjusting the backlight brightness. After adjusting the backlight brightness, the display brightness corresponding to the initial gray level of 255 becomes fully bright, thus keeping the range of display brightness unchanged.

[0103] The display brightness adjustment method provided in this embodiment determines the target backlight brightness after determining the target driving voltage of the liquid crystal display device, and controls the liquid crystal display device to operate according to the target driving voltage and target backlight brightness. This effectively ensures that the liquid crystal response time is reduced and the trailing phenomenon is reduced while keeping the range of display brightness unchanged.

[0104] Figure 4a This is a flowchart illustrating a third embodiment of the display brightness adjustment method provided in this application. Based on the above embodiments, this application describes how a target gamma curve is generated according to a preset grayscale conversion table and a preset gamma curve, and then the target transmittance is determined. For example... Figure 4a As shown, the display brightness adjustment method specifically includes the following steps:

[0105] S401: Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve.

[0106] In this step, to improve the efficiency of determining the target transmittance, a target gamma curve can be generated.

[0107] Since the preset grayscale conversion table contains the correspondence between each initial grayscale and each target grayscale, the target gamma curve can be generated based on the preset grayscale conversion table and the preset gamma curve. The target gamma curve is the curve showing the correspondence between the initial grayscale and the target transmittance.

[0108] For example, Figure 4b The target gamma curve provided for the embodiments of this application, such as Figure 4b As shown, the transmittance ranges from 0.2 to 0.8. Using this gamma curve to determine the target transmittance can reduce the liquid crystal response time. It should be noted that the embodiments of this application do not limit the target gamma curve, which can be determined according to the actual situation.

[0109] S402: Determine the target transmittance based on the initial grayscale and the target gamma curve.

[0110] In this step, after generating the target gamma curve, the liquid crystal display device can determine the target transmittance based on the initial grayscale and the target gamma curve.

[0111] It should be noted that during the initial run of this solution, a target gamma curve can be generated based on a preset grayscale conversion table and a preset gamma curve, and then this target gamma curve can be stored. In subsequent runs of this solution, the target transmittance is determined directly based on the acquired initial grayscale and the stored target gamma curve, without the need to generate the target gamma curve again.

[0112] The display brightness adjustment method provided in this embodiment generates a target gamma curve based on a preset grayscale conversion table and a preset gamma curve, and then determines the target transmittance based on the initial grayscale and the target gamma curve, which effectively improves the efficiency of target transmittance.

[0113] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0114] Figure 5 This is a schematic diagram of an embodiment of the display brightness adjustment device provided in this application; the device can be integrated into the liquid crystal display device in the above method embodiment, or it can be implemented through the liquid crystal display device in the above method embodiment. Figure 5 As shown, the display brightness adjustment device 50 includes:

[0115] Processing module 51 is used for:

[0116] For each pixel on the LCD panel, the target gray level is determined based on the initial gray level and the preset gray level conversion table corresponding to the pixel in the current frame image obtained by the acquisition module 52. The value range of the target gray level in the preset gray level conversion table is smaller than the value range of the initial gray level in the preset gray level conversion table.

[0117] Based on the target grayscale and the preset gamma curve, the target transmittance of the liquid crystal panel at the pixel is determined, and the gamma curve is the curve showing the correspondence between grayscale and transmittance.

[0118] Based on the relationship between transmittance and driving voltage and the target transmittance, the target driving voltage of the liquid crystal molecules corresponding to the pixel is determined.

[0119] The control module 53 is used to control the liquid crystal molecules in the liquid crystal display device to operate according to the target driving voltage.

[0120] Furthermore, the processing module 51 is also used to determine the target backlight brightness.

[0121] Furthermore, the control module 53 is also used to control the backlight module corresponding to the pixel in the liquid crystal display device to operate according to the target backlight brightness.

[0122] Furthermore, the processing module 51 is specifically used for:

[0123] Based on the initial grayscale, the preset gamma curve, and the target transmittance, determine the transmittance ratio between the transmittance corresponding to the initial grayscale and the target transmittance;

[0124] The target backlight brightness is determined by multiplying the light transmittance ratio and the preset base backlight brightness.

[0125] Furthermore, the processing module 51 is specifically used for:

[0126] Determine the grayscale ratio between the initial grayscale and the target grayscale;

[0127] The target backlight brightness is determined by multiplying the grayscale ratio and the preset base backlight brightness.

[0128] Furthermore, the processing module 51 is also used for:

[0129] Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve;

[0130] The target transmittance is determined based on the initial grayscale and the target gamma curve.

[0131] The display brightness adjustment device provided in this embodiment is used to execute the technical solution in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0132] Figure 6 This is a schematic diagram of the structure of a liquid crystal display device provided in this application. Figure 6 As shown, the liquid crystal display device 60 includes:

[0133] Processor 61, memory 62, communication interface 63, liquid crystal display 64;

[0134] The memory 62 is used to store the executable instructions of the processor 61;

[0135] The processor 61 is configured to execute the technical solutions in any of the foregoing method embodiments by executing the executable instructions.

[0136] Optionally, the memory 62 can be either standalone or integrated with the processor 61.

[0137] Optionally, when the memory 62 is a device independent of the processor 61, the liquid crystal display device 60 may further include:

[0138] Bus 65, memory 62 and communication interface 63 are connected to processor 61 through bus 65 and complete communication with each other. Communication interface 63 is used to communicate with other devices.

[0139] Optionally, the communication interface 63 can be implemented using a transceiver. The communication interface is used to enable communication between the database access device and other devices (e.g., clients, read-write databases, and read-only databases). The memory may include random access memory (RAM) and may also include non-volatile memory, such as at least one disk drive.

[0140] Bus 65 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0141] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0142] The liquid crystal display device is used to execute the technical solutions in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0143] This application also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the technical solutions provided in any of the foregoing method embodiments.

[0144] This application also provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the technical solutions provided in any of the foregoing method embodiments.

[0145] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for adjusting display brightness, characterized in that, include: For each pixel on the LCD panel, a target gray level is determined based on the initial gray level and the preset gray level conversion table corresponding to the pixel in the current frame image. The value range of the target gray level in the preset gray level conversion table is smaller than the value range of the initial gray level in the preset gray level conversion table. Based on the target grayscale and the preset gamma curve, the target transmittance of the liquid crystal panel at the pixel is determined, and the gamma curve is the curve showing the correspondence between grayscale and transmittance. Based on the relationship between transmittance and driving voltage and the target transmittance, the target driving voltage of the liquid crystal molecules corresponding to the pixel is determined. The liquid crystal molecules in the liquid crystal display device are controlled to operate according to the target driving voltage.

2. The method according to claim 1, characterized in that, After determining the target driving voltage of the liquid crystal molecules corresponding to the pixel based on the correspondence between transmittance and driving voltage and the target transmittance, the method further includes: Determine the target backlight brightness; The backlight module corresponding to the pixel in the liquid crystal display device is controlled to operate according to the target backlight brightness.

3. The method according to claim 2, characterized in that, Determining the target backlight brightness includes: Based on the initial grayscale, the preset gamma curve, and the target transmittance, determine the transmittance ratio between the transmittance corresponding to the initial grayscale and the target transmittance; The target backlight brightness is determined by multiplying the light transmittance ratio and the preset base backlight brightness.

4. The method according to claim 2, characterized in that, Determining the target backlight brightness includes: Determine the grayscale ratio between the initial grayscale and the target grayscale; The target backlight brightness is determined by multiplying the grayscale ratio and the preset base backlight brightness.

5. The method according to claim 1, characterized in that, Before determining the target driving voltage of the liquid crystal molecules corresponding to the pixel based on the correspondence between transmittance and driving voltage and the target transmittance, the method further includes: Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve; The target transmittance is determined based on the initial grayscale and the target gamma curve.

6. A display brightness adjustment device, characterized in that, include: Processing module, used for: For each pixel on the LCD panel, the target gray level is determined based on the initial gray level and the preset gray level conversion table corresponding to the pixel in the current frame image obtained by the acquisition module. The value range of the target gray level in the preset gray level conversion table is smaller than the value range of the initial gray level in the preset gray level conversion table. Based on the target grayscale and the preset gamma curve, the target transmittance of the liquid crystal panel at the pixel is determined, and the gamma curve is the curve showing the correspondence between grayscale and transmittance. Based on the relationship between transmittance and driving voltage and the target transmittance, the target driving voltage of the liquid crystal molecules corresponding to the pixel is determined. A control module is used to control the liquid crystal molecules in the liquid crystal display device to operate according to the target driving voltage.

7. The apparatus according to claim 6, characterized in that, The processing module is further configured to: Determine the target backlight brightness; Control the backlight module corresponding to the pixel in the liquid crystal display device to operate according to the target backlight brightness; Generate the target gamma curve based on the preset grayscale conversion table and the preset gamma curve; The target transmittance is determined based on the initial grayscale and the target gamma curve; Based on the initial grayscale, the preset gamma curve, and the target transmittance, determine the transmittance ratio between the transmittance corresponding to the initial grayscale and the target transmittance; The target backlight brightness is determined by multiplying the light transmittance ratio and the preset base backlight brightness. or, Determine the grayscale ratio between the initial grayscale and the target grayscale; The target backlight brightness is determined by multiplying the grayscale ratio and the preset base backlight brightness.

8. A liquid crystal display device, characterized in that, include: Processor, memory, communication interface, liquid crystal display; The memory is used to store the executable instructions of the processor; The processor is configured to execute the display brightness adjustment method according to any one of claims 1 to 5 by executing the executable instructions.

9. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the display brightness adjustment method according to any one of claims 1 to 5.

10. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, is used to implement the display brightness adjustment method according to any one of claims 1 to 5.

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