Brightness adjusting method and device and display panel

Abstract

The invention provides a brightness adjusting method and device and a display panel. The method comprises the following steps: receiving a first dimming control signal; a light-emitting pulse signal is generated according to the first dimming control signal, the light-emitting pulse signal is used for brightness adjustment of the display panel, the light-emitting pulse signal comprises M pulses, and M is a positive integer greater than or equal to 2; wherein the M pulses comprise X first pulses and Y second pulses, the pulse width of the low level of the X first pulses is larger than the pulse width of the low level of the Y second pulses, and X and Y are positive integers smaller than M. According to the method, the probability of brightness reduction and stroboflash of the display panel during low-brightness display can be reduced, so that the SVM index of the display panel during low-brightness display can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a brightness adjustment method, device and display panel. Background Art

[0002] With the continuous development of AMOLED display technology, users' requirements for AMOLED products are also increasing; users' expectations for AMOLED products are not limited to the improvement of image quality, but also include more sophisticated brightness adjustment functions. In this context, brightness adjustment has become one of the important indicators for measuring the quality of AMOLED products. AMOLED screens with excellent brightness adjustment functions can provide a more comfortable visual experience according to different ambient light conditions and user needs.

[0003] However, when the AMOLED module uses PWM dimming to display low-brightness images, the low duty cycle of the light-emitting pulse may lead to insufficient charging time for the light-emitting device, especially the first light-emitting pulse, which cannot accumulate enough charge in a short time, resulting in unstable driving current. This current instability will directly affect the brightness output of the pixel, causing the display screen to show brightness reduction and flickering, causing the SVM measurement index to deteriorate. Summary of the invention

[0004] The present application provides a brightness adjustment method, device and display panel, which can reduce the probability of brightness drop and flickering when the display panel displays at low brightness, thereby helping to improve the SVM index of the display panel when displaying at low brightness.

[0005] In a first aspect, a method for adjusting brightness is provided, the method comprising: receiving a first dimming control signal; generating a light-emitting pulse signal according to the first dimming control signal, the light-emitting pulse signal being used for adjusting the brightness of a display panel, the light-emitting pulse signal comprising M pulses, where M is a positive integer greater than or equal to 2; wherein the M pulses comprise: X first pulses and Y second pulses, a low-level pulse width of the X first pulses being greater than a low-level pulse width of the Y second pulses, and X and Y being positive integers less than M.

[0006] In an embodiment of the present application, by increasing the pulse width of some pulses (corresponding to the first pulse) in the light-emitting pulse signal, the probability of brightness drop and flickering of the display panel when displaying at low brightness can be reduced, which helps to improve the SVM index of the display panel when displaying at low brightness, thereby reducing the fatigue of the human eye in night environments or scenarios with dim ambient light, reducing the discomfort caused by flickering to the human eye, and optimizing the user experience of the display panel.

[0007] In combination with the first aspect, in some implementations of the first aspect, the X first pulses are first X pulses of the M pulses.

[0008] Because when the AMOLED display panel uses PWM dimming control for low-brightness display, the brightness drop of the first few pulses can easily lead to flickering. In the embodiment of the present application, by increasing the pulse width of the first X pulses in the light-emitting pulse signal, the probability of brightness drop and flickering in the display panel when displaying at low brightness can be more effectively reduced, thereby significantly improving the user's visual comfort in a dark environment.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the M pulses include N groups of pulses, each group of the N groups of pulses includes: a first pulse and two second pulses, and N is a positive integer less than M.

[0010] In a possible implementation manner, the first pulse in the N groups of pulses is a first pulse, and the second and third pulses are second pulses.

[0011] In an embodiment of the present application, M pulses are divided into N groups of pulses, each group of pulses includes the first pulse. In this way, the probability of brightness drop and flickering of the display panel when displaying at low brightness can be more effectively reduced, thereby significantly improving the user's visual comfort in a dim environment.

[0012] In combination with the first aspect, in some implementations of the first aspect, a difference between the pulse widths of the X first pulses and the Y second pulses is a first preset value.

[0013] In the embodiment of the present application, by setting the pulse width difference between the first pulse and the second pulse, the probability of brightness drop and flickering of the display panel when displaying at low brightness can be more effectively reduced, thereby providing users with a softer and more comfortable visual experience.

[0014] In combination with the first aspect, in some implementations of the first aspect, the first preset value is 40 times the time it takes the display panel to display a row of pixels.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the M pulses are located in the same frame rate period, and a duty cycle of the low level of the light-emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

[0016] In the embodiment of the present application, by setting the range of the low-level duty cycle of the light-emitting pulse signal, it is possible to reduce the probability of brightness drop and flicker when the display panel displays at low brightness, and ensure the accuracy of the color displayed by the display panel, so as to achieve a balance between flicker and display quality.

[0017] In combination with the first aspect, in certain implementations of the first aspect, before receiving the first dimming control signal, the method also includes: receiving a second dimming control signal; and according to the second dimming control signal, controlling the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel to be a second preset value, wherein the second preset value is greater than or equal to 0.

[0018] In an embodiment of the present application, by setting the difference between the initialization voltage and the cathode voltage of the OLED device, it is possible to ensure that a higher current is provided when the pixel is started, thereby increasing the brightness of the first few pulses of the display panel when displaying at low brightness, thereby more effectively improving the flicker phenomenon of the display panel.

[0019] In a second aspect, a brightness adjustment device is provided, the device comprising: a transceiver unit and a processing unit; the transceiver unit is used to receive a first dimming control signal; the processing unit is used to generate a light-emitting pulse signal according to the first dimming control signal, the light-emitting pulse signal is used to adjust the brightness of the display panel, the light-emitting pulse signal comprises M pulses, M is a positive integer greater than or equal to 2; wherein the M pulses comprise: X first pulses and Y second pulses, the low-level pulse width of the X first pulses is greater than the low-level pulse width of the Y second pulses, and X and Y are positive integers less than M.

[0020] In combination with the second aspect, in some implementations of the second aspect, the X first pulses are the first X pulses of the M pulses.

[0021] In combination with the second aspect, in certain implementations of the second aspect, the M pulses include N groups of pulses, each group of the N groups of pulses includes: a first pulse and two second pulses, and N is a positive integer less than M.

[0022] In combination with the second aspect, in some implementations of the second aspect, a difference between the pulse widths of the X first pulses and the Y second pulses is a first preset value.

[0023] In combination with the second aspect, in some implementations of the second aspect, the first preset value is 40 times the time it takes the display panel to display a row of pixels.

[0024] In combination with the second aspect, in certain implementations of the second aspect, the M pulses are located in the same frame rate period, and a duty cycle of the low level of the light-emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

[0025] In combination with the second aspect, in certain implementations of the second aspect, the transceiver unit is further used to receive a second dimming control signal; the processing unit is further used to control the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel to a second preset value according to the second dimming control signal, and the second preset value is greater than or equal to 0.

[0026] In a third aspect, a device for adjusting brightness is provided, comprising: at least one processor and a memory, wherein the at least one processor is coupled to the memory and is used to read and execute instructions in the memory, so that the device implements the method in any one of the implementation modes of the first aspect above.

[0027] According to a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer executes the method in any one of the implementations of the first aspect.

[0028] In a fifth aspect, a chip is provided, the chip comprising a circuit, the circuit being used to execute the method in any one of the implementations of the first aspect above.

[0029] According to a sixth aspect, a computer program product is provided. The computer product includes a computer program. When the computer program is executed by a processor, the method in any one of the implementations of the first aspect is executed.

[0030] In a seventh aspect, a display panel is provided, comprising a brightness adjustment device in any one of the implementations of the second aspect or the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a curve diagram showing the change of light pulse over time when PWM dimming is performed on an AMOLED module provided in an embodiment of the present application;

[0032] Figure 2 is a schematic diagram showing changes in display brightness of an AMOLED module over time provided by an embodiment of the present application;

[0033] Figure 3 is a schematic flow chart of a brightness adjustment method provided in an embodiment of the present application;

[0034] Figure 4 is a schematic diagram of an AMOLED module EM pulse optimization waveform provided in an embodiment of the present application;

[0035] Figure 5 This is another waveform diagram of the brightness change over time of an AMOLED module after optimization provided in an embodiment of the present application;

[0036] Figure 6 is a schematic diagram of another AMOLED module EM pulse optimization waveform provided in an embodiment of the present application;

[0037] Figure 7 This is another waveform diagram of the brightness change over time of an AMOLED module after optimization provided in an embodiment of the present application;

[0038] Figure 8 is a schematic diagram of another AMOLED module EM pulse optimization waveform provided in an embodiment of the present application;

[0039] Fig. 9 This is another waveform diagram of the brightness change over time of an AMOLED module after optimization provided in an embodiment of the present application;

[0040] Fig.10 This is a schematic diagram of a pixel circuit of an AMOLED module light-emitting device provided in an embodiment of the present application;

[0041] Fig.11 is a schematic diagram of a brightness adjustment device provided in an embodiment of the present application;

[0042] Fig.12 is a schematic diagram of another brightness adjustment device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0044] The prefixes such as "first" and "second" used in the embodiments of the present application are only used to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers used to distinguish description objects in the embodiments of the present application does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation.

[0045] In order to better understand the present application, the terms involved in the present application are first explained and illustrated.

[0046] (1) Pulse width modulation (PWM) dimming technology: The brightness is adjusted by quickly switching the display panel on and off. In PWM dimming technology, changing the duty cycle of the switch (the ratio of on and off time) can control the time that the current flows through the light-emitting layer, thereby achieving the purpose of adjusting the brightness. For AMOLED display modules, the duty cycle usually refers to the proportion of the low level of the emission pulse (EM Pulse) in one cycle. The lower the duty cycle, the lower the screen brightness.

[0047] (2) Stroboscopic effect visibility measure (SVM): is an indicator used to quantify the visibility of the stroboscopic effect of a light source. The stroboscopic effect refers to the phenomenon that under certain specific conditions, due to the periodic fluctuation of the brightness of the light source, the human eye's perception of moving objects becomes intermittent, blurred or distorted. Among them, the larger the SVM value, the higher the stroboscopic intensity and the more serious the stroboscopic phenomenon. Correspondingly, the smaller the SVM value, the lower the stroboscopic intensity and the more stable the stroboscopic phenomenon. For example, the value of SVM can be calculated by the following formula:

[0048]

[0049] Wherein, Tm is the relative amplitude of the mth Fourier component of the relative illumination waveform; Cm is the stroboscopic effect contrast threshold function value corresponding to the frequency fm.

[0050] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0051] With the continuous development of AMOLED display technology, users' requirements for AMOLED products are also increasing; users' expectations for AMOLED products are not limited to the improvement of image quality, but also include more sophisticated brightness adjustment functions. In this context, brightness adjustment has become one of the important indicators for measuring the quality of AMOLED products. AMOLED screens with excellent brightness adjustment functions can provide a more comfortable visual experience according to different ambient light conditions and user needs.

[0052] In actual applications, a display panel with an AMOLED display module can adjust the luminous brightness of the display screen through low-frequency PWM dimming technology or high-frequency PWM dimming technology: when the AMOLED display module adopts low-frequency PWM dimming technology to adjust the screen brightness of the display device, the selectable PWM dimming frequencies are 120Hz, 240Hz, 480Hz, etc.; when the AMOLED display module adopts high-frequency PWM dimming technology to adjust the screen brightness of the display device, the selectable PWM dimming frequencies are 1440Hz, 1920Hz, 2160Hz, 3840z, 4320Hz, etc.

[0053] For example, the basic refresh frequency is 120Hz, the high-frequency PWM dimming frequency is 2160Hz, the time of each frame period is 8.34ms, the number of EM pulses and PWM pulses in each frame period is 18, and the time of each pulse is 0.46ms. Figure 1 As shown, when the AMOLED display module displays a low-brightness image (for example, 2nit), the duty cycle of the low level of the light pulse signal is relatively low, usually only about 10%. Assuming that the pulses are set to be of equal width, and the low level in the light pulse signal accounts for 10%, the low level time of each EM pulse or PWM pulse is only 0.046ms; since the duty cycle of the light pulse signal is relatively low, it may cause insufficient charging time for the light-emitting device, especially the first light pulse, which cannot accumulate enough charge in a short time, thereby making the driving current unstable; this current instability will directly affect the brightness output of the pixel, causing the display screen to show brightness reduction and flickering, causing the SVM measurement index to deteriorate. Specifically, as Figure 2 As shown, in each frame display cycle, the luminous brightness of the first pulse is low, and there is a phenomenon of brightness reduction, which cannot effectively achieve the target display brightness in a short time. In addition, the fluctuation between the first pulse and other pulses in the same cycle is large, which leads to the deterioration of the SVM index.

[0054] The embodiments of the present application provide a brightness adjustment method, device and display panel, which can reduce the probability of brightness drop and flickering of the display panel when displaying at low brightness, thereby helping to improve the SVM index of the display panel when displaying at low brightness.

[0055] Figure 3 It is a schematic flowchart of a brightness adjustment method provided in an embodiment of the present application. The execution subject of method 300 may be a driver chip or a controller in a display panel. Method 300 may include steps S301 and S302.

[0056] S301, receiving a first dimming control signal.

[0057] Optionally, the first dimming control signal may be generated by a main control chip in the display panel and sent to the driving chip.

[0058] Alternatively, the first dimming control signal may be a dimming control signal generated based on a user input (eg, a slider or button input).

[0059] Optionally, the first dimming control signal may be derived from an intelligent dimming algorithm, which generates the first dimming control signal by comprehensively analyzing the ambient light of the display panel, user habits or power consumption requirements.

[0060] S302: Generate a light-emitting pulse signal according to the first dimming control signal.

[0061] The light-emitting pulse signal is used to adjust the brightness of the display panel. The light-emitting pulse signal includes M pulses, where M is a positive integer greater than or equal to 2. The M pulses include: X first pulses and Y second pulses. The low-level pulse width of the X first pulses is greater than the low-level pulse width of the Y second pulses. X and Y are positive integers less than M.

[0062] In a possible implementation manner, the X first pulses are the first X pulses among the M pulses.

[0063] For example, Figure 4 As shown, one frame rate cycle includes 18 pulses. When X=1, the pulse width of the first pulse is increased, and the brightness compensation of the first pulse can be achieved. The brightness waveform after compensation can be as follows Figure 5 As shown, from Figure 5 and Figure 2 It can be seen from the comparison that the brightness decrease of the first pulse has been alleviated.

[0064] In a possible implementation, the M pulses include N groups of pulses, each of the N groups of pulses includes: a first pulse and two second pulses, N is a positive integer less than M, that is, in this case, N=X, Y=2X, M=3N.

[0065] Optionally, the first pulse in the N groups of pulses is a first pulse, and the second and third pulses are second pulses.

[0066] Optionally, the difference between the pulse widths of the X first pulses and the Y second pulses is a first preset value, wherein the difference between the pulse widths of the X first pulses and the Y second pulses is the first preset value can be understood as: the difference between the pulse widths of any one of the X first pulses and any one of the Y second pulses is the first preset value. Further optionally, the first preset value is 40 times the time it takes for the display panel to display a row of pixels.

[0067] For example, Figure 6As shown in FIG. 1 , a frame rate cycle includes 18 pulses, and the 18 pulses can correspond to 6 groups of pulses. The pulse width of the first pulse in each group of pulses is a, and the pulse widths of the second and third pulses are b, and ab=40H. When the display panel includes an AMOLED module, H is the time for the AMOLED to display a row of pixels. Thus, the brightness compensation of the first pulse in each group can be achieved, and the compensated brightness waveform can be as follows: Figure 7 As shown, from Figure 7 and Figure 2 It can be seen from the comparison that the brightness decrease of the first pulse in each group of pulses is alleviated.

[0068] It should be noted that Figure 6 and Figure 7 The description is made by taking the example that each group of pulses includes 3 pulses, which does not constitute a limitation on the present application. The number of pulses in each group of pulses may be associated with the number of pulses in each frame period and the support status of DDIC.

[0069] In a possible implementation, the M pulses are located in the same frame rate period, and the duty cycle of the low level of the light emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

[0070] Alternatively, this implementation may also be independent of method 300, that is, the pulse widths of the M pulses are the same, and the duty cycle of the low level of the light emitting pulse signal is greater than or equal to 12% and less than or equal to 15%. Figure 8 As shown in FIG. 1 , a frame rate cycle includes 18 pulses, the pulse widths of the 18 pulses are equal, and the low level of the entire luminous pulse signal accounts for 12%. Thus, the brightness compensation of each pulse can be achieved, and the compensated brightness waveform can be as follows: Fig. 9 As shown, from Fig. 9 and Figure 2 From the comparison, it can be seen that the brightness drop of the first pulse has been alleviated. The considerations for this setting are as follows: when the low-level duty cycle of the light-emitting pulse signal increases, the OELD light-emitting current of each pulse decreases, which in turn affects the driving current of the RGB sub-pixels. This is because the response times of different RGB sub-pixels are different. At a smaller current density, the impact ratio of the RGB sub-pixels will be amplified, thereby changing the color ratio of the RGB sub-pixels and affecting the accuracy of the displayed colors. Therefore, simply increasing the duty cycle of the low level of the light-emitting pulse signal will cause the display quality of the display panel to deteriorate. By setting the range of the low-level duty cycle of the light-emitting pulse signal to 12% to 15%, it can not only reduce the probability of brightness drop and flicker of the display panel when displaying at low brightness, but also ensure the accuracy of the color displayed by the display panel, so as to achieve a balance between flicker and display quality.

[0071] In a possible implementation, before step S301, method 300 further includes: receiving a second dimming control signal; and according to the second dimming control signal, controlling the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel to be a second preset value, wherein the second preset value is greater than or equal to 0.

[0072] For example, Fig.10 As shown, the OLED device initialization voltage is V INIT , the cathode voltage is ELVSS, by setting V INIT -ELVSS=0.5V can more effectively improve the flicker phenomenon of the display panel. This is because a higher initialization voltage difference can provide a higher current when the pixel is started, thereby increasing the brightness of the first pulse during low-brightness display, thereby improving the brightness drop. In addition, a higher initialization voltage also helps to eliminate the charge trap effect and the influence of parasitic capacitance, thereby ensuring that the startup time of each pixel is as similar as possible, making the brightness of the display panel more uniform, thereby more effectively improving the flicker phenomenon.

[0073] It should be noted that this implementation method can also be applied independently of the method 300, and can also improve the stroboscopic phenomenon of the display panel.

[0074] In an embodiment of the present application, by increasing the pulse width of some pulses (corresponding to the first pulse) in the light-emitting pulse signal, the probability of brightness drop and flickering of the display panel when displaying at low brightness can be reduced, which helps to improve the SVM index of the display panel when displaying at low brightness, thereby reducing the fatigue of the human eye in night environments or scenarios with dim ambient light, reducing the discomfort caused by flickering to the human eye, and optimizing the user experience.

[0075] It should be understood that in the various implementations of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the various implementations are consistent and can be referenced to each other, and the technical features in different implementations can be combined to form new implementations or examples based on their internal logical relationships.

[0076] The embodiments of the present application also provide a device for implementing any of the above methods, wherein the device includes a unit for implementing each step performed in any of the above methods.

[0077] Fig.111 is a schematic diagram of a brightness adjustment device provided in an embodiment of the present application. The device 1100 may include a transceiver unit 1110, a storage unit 1120, and a processing unit 1130. The transceiver unit 1110 is used to obtain instructions and / or data. The transceiver unit 1110 may also be referred to as a communication interface or a communication unit. The storage unit 1120 is used to implement a corresponding storage function and store corresponding instructions and / or data. The processing unit 1130 is used to perform data processing so that the device 1100 implements the above-mentioned brightness adjustment method.

[0078] The device 1100 includes: a transceiver unit 1110 and a processing unit 1130; the transceiver unit 1110 is used to receive a first dimming control signal; the processing unit 1130 is used to generate a light-emitting pulse signal according to the first dimming control signal, the light-emitting pulse signal is used to adjust the brightness of the display panel, and the light-emitting pulse signal includes M pulses, where M is a positive integer greater than or equal to 2; wherein the M pulses include: X first pulses and Y second pulses, the low-level pulse width of the X first pulses is greater than the low-level pulse width of the Y second pulses, and X and Y are positive integers less than M.

[0079] In a possible implementation manner, the X first pulses are the first X pulses of the M pulses.

[0080] In a possible implementation, the M pulses include N groups of pulses, each of the N groups of pulses includes: a first pulse and two second pulses, and N is a positive integer less than M.

[0081] In a possible implementation, a difference between the pulse widths of the X first pulses and the pulse widths of the Y second pulses is a first preset value.

[0082] In a possible implementation, the first preset value is 40 times the time it takes for the display panel to display a row of pixels.

[0083] In a possible implementation, the M pulses are located in the same frame rate period, and the duty cycle of the low level of the light emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

[0084] In one possible implementation, the transceiver unit 1110 is also used to receive a second dimming control signal; the processing unit 1130 is also used to control the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel to be a second preset value according to the second dimming control signal, and the second preset value is greater than or equal to 0.

[0085] Fig.121 is a schematic diagram of another brightness adjustment device provided in an embodiment of the present application, wherein the device 1200 includes: a memory 1210, a processor 1220, and a communication interface 1230. The memory 1210, the processor 1220, and the communication interface 1230 are connected through an internal connection path, the memory 1210 is used to store instructions, and the processor 1220 is used to execute the instructions stored in the memory 1210 to control the communication interface 1230 to obtain information, or to enable the device 1200 to implement the aforementioned display panel brightness adjustment method. Optionally, the memory 1210 can be coupled to the processor 1220 through an interface, or can be integrated with the processor 1220.

[0086] It should be noted that the communication interface 1230 uses a transceiver device such as, but not limited to, a transceiver. The communication interface 1230 may also include an input / output interface.

[0087] The processor 1220 stores one or more computer programs, and the one or more computer programs include instructions. When the instructions are executed by the processor 1220, the device 1200 executes the brightness adjustment method in the above embodiments.

[0088] In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor 1220 or an instruction in the form of software. The method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1210, and the processor 1220 reads the information in the memory 1210 and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0089] Optionally, Fig.12 The communication interface 1230 in the embodiment can be implemented Fig.11 The transceiver unit 1110 in Fig.12 The memory 1210 in the embodiment can realize Fig.11 The storage unit 1120, Fig.12 The processor 1220 in the embodiment can implement Fig.11 The processing unit 1130 in.

[0090] The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer executes the above Figure 3 The method shown.

[0091] The present application also provides a computer program product, which includes a computer program. When the computer program is executed, the computer executes the above Figure 3 The method shown.

[0092] The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer executes the above Figure 3 The method shown.

[0093] The present application also provides a chip, which includes a circuit for executing the above Figure 3 The method shown.

[0094] The present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the above Figure 3 The method shown.

[0095] The present application also provides a display panel, including the above Fig.11 or Fig.12 The brightness adjustment device shown.

[0096] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0098] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0099] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0101] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for adjusting brightness, characterized in that: The method comprises: receiving a first dimming control signal; generating a light emitting pulse signal according to the first dimming control signal, wherein the light emitting pulse signal is used for adjusting the brightness of the display panel, and the light emitting pulse signal includes M pulses, where M is a positive integer greater than or equal to 2; The M pulses include: X first pulses and Y second pulses, the low level pulse widths of the X first pulses are greater than the low level pulse widths of the Y second pulses, and X and Y are positive integers less than M.

2. The method according to claim 1, characterized in that The X first pulses are the first X pulses among the M pulses.

3. The method according to claim 1, characterized in that The M pulses include N groups of pulses, each of the N groups of pulses includes: one first pulse and two second pulses, and N is a positive integer less than M.

4. The method according to any one of claims 1 to 3, characterized in that A difference between the pulse widths of the X first pulses and the Y second pulses is a first preset value.

5. The method according to claim 4, characterized in that The first preset value is 40 times the time it takes for the display panel to display a row of pixels.

6. The method according to any one of claims 1 to 5, characterized in that The M pulses are located in a same frame rate period, and a duty cycle of a low level of the light emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

7. The method according to any one of claims 1 to 6, characterized in that Before receiving the first dimming control signal, the method further includes: receiving a second dimming control signal; According to the second dimming control signal, the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel is controlled to be a second preset value, and the second preset value is greater than or equal to 0.

8. A brightness adjustment device, characterized in that: The device comprises: a transceiver unit and a processing unit; The transceiver unit is used to receive a first dimming control signal; The processing unit is used to generate a light emitting pulse signal according to the first dimming control signal, wherein the light emitting pulse signal is used to adjust the brightness of the display panel, and the light emitting pulse signal includes M pulses, where M is a positive integer greater than or equal to 2; The M pulses include: X first pulses and Y second pulses, the low level pulse widths of the X first pulses are greater than the low level pulse widths of the Y second pulses, and X and Y are positive integers less than M.

9. The device according to claim 8, characterized in that The X first pulses are the first X pulses among the M pulses.

10. The device according to claim 8, characterized in that The M pulses include N groups of pulses, each of the N groups of pulses includes: one first pulse and two second pulses, and N is a positive integer less than M.

11. The device according to any one of claims 8 to 10, characterized in that A difference between the pulse widths of the X first pulses and the Y second pulses is a first preset value.

12. The device according to claim 11, characterized in that The first preset value is 40 times the time it takes for the display panel to display a row of pixels.

13. The device according to any one of claims 8 to 12, characterized in that The M pulses are located in a same frame rate period, and a duty cycle of a low level of the light emitting pulse signal is greater than or equal to 12% and less than or equal to 15%.

14. The device according to any one of claims 8 to 13, characterized in that The transceiver unit is further used to receive a second dimming control signal; The processing unit is further configured to control the difference between the initialization voltage and the cathode voltage of the OLED device in the display panel to be a second preset value according to the second dimming control signal, wherein the second preset value is greater than or equal to 0.

15. A display panel, characterized in that: The display panel comprises the brightness adjustment device according to any one of claims 8 to 14.

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