CN117475841A - Display screen dimming method and device, storage medium and electronic equipment - Google Patents

Display screen dimming method and device, storage medium and electronic equipment Download PDF

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Publication number
CN117475841A
CN117475841A CN202311118546.2A CN202311118546A CN117475841A CN 117475841 A CN117475841 A CN 117475841A CN 202311118546 A CN202311118546 A CN 202311118546A CN 117475841 A CN117475841 A CN 117475841A
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China
Prior art keywords
display screen
dimming
dimming mode
target
brightness
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CN202311118546.2A
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Chinese (zh)
Inventor
陈�峰
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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Priority to CN202311118546.2A priority Critical patent/CN117475841A/en
Publication of CN117475841A publication Critical patent/CN117475841A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application provides a dimming method and device of a display screen, a storage medium and electronic equipment. The dimming method comprises the following steps: determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, wherein the dimming mode is used for adjusting the screen brightness of the display screen; and adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen. Because the dimming modes with multiple frequencies are determined in advance according to the comfort level of the user and the environmental change, compared with the dimming mode with the existing display screen only supporting a single frequency, the dimming method fully considers different individual demands of different users and the environmental light brightness change around the product, can improve the user experience, and also enables the terminal to be more intelligent, thereby further improving the competitiveness of the product.

Description

Display screen dimming method and device, storage medium and electronic equipment
Technical Field
The application relates to the technical field of display, in particular to a dimming method and device of a display screen, a storage medium and electronic equipment.
Background
The adaptability of the human eye to the brightness of the display screen is also different under different ambient brightness. The display screen can adjust light according to manual adjustment instructions of a user so as to adjust display brightness of the display screen.
The display brightness of the display screen can be adjusted by adopting a direct current dimming mode. However, when the display brightness is low, direct Current (DC) dimming is adopted, and the display screen may generate significant brightness non-uniformity (Mura), thereby affecting the display effect. To mitigate or even avoid Mura during brightness adjustment, pulse width modulation (Pulse Width Modulation, PWM) dimming may be employed to adjust the brightness of the display screen. However, the current display screen only supports a single-frequency PWM dimming mode, so that the problem that the screen brightness cannot meet the use requirements of users under different ambient light brightness exists, and the improvement of user experience is not facilitated.
Disclosure of Invention
In view of this, the present application provides a dimming method and apparatus for a display screen, a storage medium, and an electronic device, so as to solve the problem that the display screen cannot support a dimming mode with multiple frequencies.
A first aspect of the present application provides a dimming method of a display screen, including: determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, wherein the dimming mode is used for adjusting the screen brightness of the display screen; and adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen.
In a specific embodiment of the first aspect of the present application, determining, based on a preset dimming mode of a plurality of frequencies, a target dimming mode corresponding to a display screen includes: acquiring ambient brightness data outside a display screen; determining a target dimming mode corresponding to the display screen based on the ambient brightness data and the dimming modes of the plurality of frequencies; the target dimming mode is adapted to ambient brightness data outside the display screen.
In a specific embodiment of the first aspect of the present application, the dimming modes of the plurality of frequencies include a first dimming mode and a second dimming mode, and determining the target dimming mode corresponding to the display screen based on the ambient brightness data and the dimming modes of the plurality of frequencies includes: when the display screen is switched from the first display scene to the second display scene, if the ambient brightness data is smaller than or equal to a preset brightness threshold value, determining that a target dimming mode corresponding to the display screen is a first dimming mode; if the ambient brightness data is larger than the preset brightness threshold value, determining that the target dimming mode corresponding to the display screen is a second dimming mode; the dimming frequency of the first dimming mode is greater than the dimming frequency of the second dimming mode.
In a specific embodiment of the first aspect of the present application, the dimming mode adjusts the screen brightness of the display screen by changing the number of the inserted pulses; when the display screen is switched to the target dimming mode, in one vertical scanning period, the vertical scanning line number of the image displayed by the display screen in the vertical scanning direction is an integer multiple of the pulse number corresponding to the target dimming mode.
In a specific embodiment of the first aspect of the present application, the display screen includes a pixel driving circuit, and based on a target dimming mode corresponding to the display screen, the display screen is tuned to a screen brightness corresponding to the target dimming mode, including: and controlling the on-off frequency of the switching signal of the pixel driving circuit based on the target dimming mode corresponding to the display screen so as to adjust the display screen to the screen brightness corresponding to the target dimming mode.
In a specific embodiment of the first aspect of the present application, the display screen includes a plurality of different refresh rates, and based on a target dimming mode corresponding to the display screen, the frequency of turning on or off a switching signal of the pixel driving circuit is controlled to adjust the display screen to a screen brightness corresponding to the target dimming mode, including: determining the number of pulses corresponding to the switching signals of the pixel driving circuit based on the refresh rate and the target dimming mode corresponding to the display screen; adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the pulse number corresponding to the switching signals of the pixel driving circuit; the insertion time of the pulse number is between the end of writing the N-th frame image data and the beginning of writing the N+1th frame image data, wherein N is a positive integer.
In a specific embodiment of the first aspect of the present application, the display screen is in the same dimming mode, and the different refresh rates correspond to the same dimming frequency.
A second aspect of the present application provides a dimming device for a display screen, the dimming device comprising: the determining module is used for determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, and the dimming mode is used for adjusting the screen brightness of the display screen; and the dimming module is used for dimming the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen.
A third aspect of the present application provides a storage medium storing a program which, when executed by a processor, implements the dimming method of the display screen of the first aspect.
A fourth aspect of the present application provides an electronic device, including a peripheral driver chip and a display screen; the peripheral driver chip comprises a memory and a processor, wherein a program is stored in the memory, and when the program is executed by the processor, the processor is caused to execute the dimming method of the display screen provided in the first aspect.
According to the dimming method of the display screen, after the target dimming mode corresponding to the display screen is determined based on the preset dimming modes with multiple frequencies, the display screen can be adjusted to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen, and as the dimming modes with multiple frequencies are determined in advance according to the comfort level of the user and the environmental change, compared with the dimming mode with the existing display screen only supporting a single frequency, the dimming method fully considers different individual requirements of different users and the environmental light brightness change around the product, the user experience can be improved, the terminal is more intelligent, and the competitiveness of the product is further improved.
Drawings
Fig. 1 is a flowchart of a dimming method of a display screen according to an embodiment of the present application.
Fig. 2 is a flowchart of a dimming method of a display screen according to another embodiment of the present application.
Fig. 3a is a flowchart of a dimming method of a display screen according to another embodiment of the present application.
Fig. 3b is a schematic diagram of image data parameters according to an embodiment of the present application.
Fig. 3c is a schematic diagram of the relationship between the vertical synchronization signal and the data enable signal and the image parameters according to an embodiment of the present application.
Fig. 4 is a schematic diagram of waveform variation according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a pixel driving circuit according to an embodiment of the present application.
Fig. 6 is a flowchart of a dimming method of a display screen according to another embodiment of the present application.
Fig. 7 is a schematic diagram of waveform variation according to another embodiment of the present application.
Fig. 8 is a schematic diagram of waveform variation according to another embodiment of the present application.
Fig. 9 is a schematic structural diagram of a dimming device of a display screen according to an embodiment of the present application.
Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Currently, mobile terminals have a screen brightness adjusting function. Specifically, an algorithm corresponding to the brightness of the screen and the brightness of the environment is built in the mobile terminal, and when a user operates the mobile terminal to send a screen brightness adjusting instruction, the mobile terminal adjusts the brightness of the screen according to the current brightness of the environment and the built-in algorithm. However, the adjustment method does not consider individual requirements of different users, is not intelligent enough, and the existing display screen has the problem that the dimming mode with multiple frequencies cannot be supported.
The display brightness of the display screen can be adjusted by adopting a PWM dimming mode at the present stage. The most offending place of PWM dimming mode is the problem of stroboscopic effect, and during PWM dimming, human eyes feel flickering if the operating frequency is low. Therefore, in order to fully utilize the persistence of vision of human eyes, the higher the working frequency of the PWM dimming is, the better the PWM dimming is, and according to the international standard, the PWM dimming is positively related to the screen stroboscopic, but when the PWM frequency exceeds 1250Hz, the visual effect is not significantly affected.
The current high-frequency PWM dimming is popular, and the frequency of the high-frequency PWM dimming mode is high, so that the stroboscopic effect is difficult to perceive, the eye protection effect can be achieved, and the standard allocation of the mobile terminal is gradually realized. But high frequency PWM dimming is typically 10% higher in power consumption than low frequency PWM dimming, affecting overall endurance.
In view of this, the present application provides a dimming method and apparatus for a display screen, a storage medium, and an electronic device, so as to solve the problem that the existing display screen cannot support dimming modes of multiple frequencies.
Fig. 1 is a flowchart of a dimming method of a display screen according to an embodiment of the present application. As shown in fig. 1, the dimming method specifically includes the following steps.
Step 100, determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies.
The dimming mode is used for adjusting the screen brightness of the display screen. The dimming mode for each frequency may adjust the display screen to a corresponding display brightness level. The target dimming mode is used for dimming the screen brightness of the current display screen to the target screen brightness desired by the user. The frequency of the dimming mode may be manually preset, or may be set based on the size of the target screen brightness.
Specifically, the preset dimming mode of a plurality of frequencies is a PWM mode. The PWM dimming mode refers to a manner of changing the brightness of a display screen according to the on-off alternation of the display screen. In the PWM dimming mode, the display is not continuously lighted when it is lit, but is continuously switched between lit and extinguished, and the brightness of the display is considered as the desired target brightness by the human eye by adjusting the ratio of "on" to "off" times.
In some embodiments, the target dimming mode corresponding to the display screen may be manually determined. Specifically, a dimming mode selection field of a plurality of frequencies may be set, and a user may determine a target dimming mode corresponding to the display screen by clicking the selection box, or may set an input box for inputting the target dimming mode, and the user may input the target dimming mode through the input box.
In some embodiments, the dimming mode with corresponding frequency can be automatically selected to perform dimming according to the display scene, so that the display quality of the display screen is improved. That is, in a scene where the brightness of the display screen is configured to be automatically dimmed, the target dimming mode corresponding to the display screen may be determined from preset dimming modes with multiple frequencies according to the environmental brightness.
In some embodiments, the display screen may include a high frequency PWM mode and a low frequency PWM mode. The high-frequency PWM mode is used for realizing the eye protection function, and the low-frequency PWM mode is used for realizing the purpose of saving power consumption. The display screen integrates a high-frequency PWM mode and a low-frequency PWM mode simultaneously, so that free switching of the two dimming modes is realized, and the effect of balancing both eye protection and power consumption is achieved.
In other embodiments, the display screen is not limited to the high-frequency PWM mode and the low-frequency PWM mode, and may have three or more dimming modes. The dimming frequencies can be set according to actual application conditions so as to meet more requirements of users, and the method is beneficial to improving the competitiveness of products.
And step 101, adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen.
Specifically, after a dimming instruction for the display screen is received, the dimming instruction includes a target dimming mode corresponding to the display screen, dimming is performed on the display screen based on the target dimming mode corresponding to the display screen, and the display screen is adjusted to the screen brightness corresponding to the target dimming mode.
In the actual use process of the display screen, external environment light can change into bright and dark, such as changing from dark to bright, changing from bright to dark to gradually changing from bright to dark, and the like. In the process of changing the light of the external environment, the dimming instruction can be triggered by the change of the external environment, the brightness of the screen can be automatically adjusted, and a user can conveniently and clearly watch the display picture of the screen more comfortably, so that the eye protection function is realized. Of course, the user can also manually adjust the screen brightness, and the dimming command is triggered by the user. If the brightness of the current display screen does not accord with the use habit of the user, the user can also manually adjust the brightness of the terminal screen.
Illustratively, the display may be a display of an electronic device, the display may include: the display panel of the display unit may employ a liquid crystal display (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED), or the like. The display screen includes a display module, which may be a low temperature poly oxide (low temperature polycrystalline oxide, LTPO) module.
By way of example, the electronic device may be a cell phone, tablet, desktop, laptop, handheld computer, notebook, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook, smart television, smart screen, and cellular phone, personal digital assistant (personal digital assistant, PDA), augmented reality (augmented reality, AR) \virtual reality (VR) device, etc., and the specific form of the electronic device is not particularly limited in the embodiments of the present application.
According to the dimming method of the display screen, after the target dimming mode corresponding to the display screen is determined based on the preset dimming modes with multiple frequencies, the display screen can be adjusted to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen, and as the dimming mode is determined according to the comfort level of a user and the environmental change, compared with the existing display screen which only supports the PWM dimming mode with single frequency, the dimming method fully considers different individual requirements of different users and the environmental brightness change around products, so that the use requirement of the users can be met, the terminal is more intelligent, and the competitiveness of the products is further improved.
Fig. 2 is a flowchart of a dimming method of a display screen according to another embodiment of the present application. As shown in fig. 2, the target dimming mode corresponding to the display screen is determined based on the preset dimming modes of a plurality of frequencies (step 100), which includes the following steps.
And 200, acquiring the ambient brightness data outside the display screen.
Specifically, the ambient brightness data is the ambient brightness around the display screen.
In some embodiments, the light sensing can be performed by using a plurality of photosensitive elements, and when the external brightness changes, an electric signal is timely transmitted to a processing chip of the terminal where the display screen is located, so that the external brightness changes are converted into the electric signal changes.
Illustratively, the photosensitive element may be a photoresistor, a photodiode, a phototransistor, a silicon photocell, or the like. The embodiment of the application does not limit the specific form of the photosensitive element, and can be selected according to actual needs.
In some embodiments, ambient light levels may be identified or perceived through artificial intelligence (Artificial Intelligence, AI) scenes to obtain ambient light data external to the display screen in real-time.
Step 201, determining a target dimming mode corresponding to the display screen based on the ambient brightness data and the dimming modes of the plurality of frequencies.
The target dimming mode is adapted to ambient brightness data outside the display screen.
In some embodiments, the display screen integrates both the high frequency PWM mode and the low frequency PWM mode. The display screen terminal recognizes or perceives the ambient brightness data outside the display screen according to the AI scene, and if the user is determined to be in a scene with darker ambient light according to the ambient brightness data outside the display screen, the target dimming mode is switched to the high-frequency PWM mode so as to start the eye protection mode; if the user is determined to be in a bright scene such as daytime and outdoors according to the ambient brightness data outside the display screen, the target dimming mode is switched to a low-frequency PWM mode so as to promote the whole machine endurance. By freely switching the high-frequency PWM mode and the low-frequency PWM mode, the effects of eye protection and balance of power consumption are achieved. Wherein below 1250Hz may be referred to as low frequency. The low-frequency PWM mode of the embodiment of the application can be 240Hz low-frequency PWM dimming or 360Hz low-frequency PWM dimming. The high frequency PWM mode of the embodiments of the present application may be 2160Hz high frequency PWM dimming, or other frequency values higher than 1250 Hz. The specific frequencies of the low-frequency PWM mode and the high-frequency PWM mode are not limited, and the specific frequencies can be set according to actual conditions.
According to the dimming method of the display screen, the environment brightness data outside the display screen are obtained, and then the target dimming mode corresponding to the display screen is determined based on the environment brightness data and the dimming modes of a plurality of frequencies. Therefore, according to the change of the ambient light brightness, the target dimming mode corresponding to the display screen is determined, the target dimming mode can be automatically matched with the ambient brightness data, the automatic adjustment of the brightness of the display screen is realized, and the display screen has convenience and practicability relative to the manual adjustment mode of a user.
Fig. 3a is a flowchart of a dimming method of a display screen according to another embodiment of the present application. As shown in fig. 3a, the dimming modes of the plurality of frequencies include a first dimming mode and a second dimming mode, and when the display screen is switched from the first display scene to the second display scene, a target dimming mode corresponding to the display screen is determined based on the ambient brightness data and the dimming modes of the plurality of frequencies (step 201), including the following steps.
Step 300, determining whether the ambient brightness data is less than or equal to a preset brightness threshold, if yes, executing step 301. If not, go to step 302.
Step 301, determining a target dimming mode corresponding to the display screen as a first dimming mode.
Step 302, determining a target dimming mode corresponding to the display screen as a second dimming mode.
Wherein the dimming frequency of the first dimming mode is greater than the dimming frequency of the second dimming mode.
Illustratively, the first dimming mode is a high frequency dimming mode. The second dimming mode is a low frequency dimming mode.
Specifically, the preset brightness threshold may be preset and stored in a memory of the display screen terminal. After the ambient brightness data of the display screen is obtained, the ambient brightness data can be compared with a preset brightness threshold value to judge whether the ambient brightness data of the display screen is larger than the preset brightness threshold value. The preset brightness threshold value indicates whether the current brightness of the display screen can affect the use of the user. The preset brightness threshold may be set to 1250Hz, but may be set to other values according to practical situations.
When the ambient brightness data of the display screen is larger than a preset brightness threshold value, the user is indicated to be in outdoor activities, and the display screen is required to be switched to a low-frequency dimming mode; when the brightness of the display screen is smaller than or equal to a preset brightness threshold value, the display screen is in an eye-protection scene with darker ambient light, and a high-frequency dimming mode is started.
In the case that the ambient brightness data is less than or equal to the preset brightness threshold value, the smaller the ambient brightness data is, the larger the corresponding dimming frequency is.
According to the dimming method for the display screen, when the display screen is switched from the first display scene to the second display scene, whether the ambient brightness data is smaller than or equal to the preset brightness threshold value is determined, the target dimming mode corresponding to the display screen is the first dimming mode or the second dimming mode, meanwhile, the display screen integrates the high-frequency dimming mode and the low-frequency dimming mode, the two modes can be automatically switched according to ambient brightness change in the scene, and therefore the use requirements of a user can be met, the terminal is more intelligent, and the competitiveness of a product is further improved.
In some embodiments, the dimming mode adjusts the screen brightness of the display screen by varying the width of the plurality of pulses; when the display screen is switched to the target dimming mode, in one vertical scanning period, the number of pixels of an image displayed on the display screen in the vertical scanning direction is an integral multiple of the number of pulses corresponding to the target dimming mode.
It should be understood that the display image of the display screen is an appearance image scanned by an electron beam, which divides the horizontal scan and the vertical scan, the horizontal scan being referred to as a line scan and the vertical scan being referred to as a field scan. The vertical scan period is also referred to as a field scan period. The vertical scanning period refers to the time required for the display screen to scan a complete frame of pictures.
It should be noted that, the image display principle of the display is specifically that an electron gun of a Cathode Ray Tube (CRT) scans in a line from top to bottom, and after the scanning is completed, the display displays an image frame, and then the electron gun returns to an initial position to continue the next scanning. To synchronize the display process of the display with the video controller of the system, the display (or other hardware) generates a series of timing signals using a hardware clock; when the electron gun is changed to the next row and is ready for scanning, the display generates a horizontal synchronizing signal (Horizonal synchronization, hsync), and when one frame of picture is drawn, the electron gun is restored to the original position; before the next frame of image is ready to be drawn, the display will send a vertical synchronization signal (Vertical synchronization, vsync). The display is typically refreshed at a fixed frequency, which is the frequency at which the Vsync signal is generated.
An image is called a Frame, each Frame consisting of a plurality of lines, each line consisting of a plurality of pixels, the color of each pixel being represented using several bits of data. For an image consisting of 8294400 (3840×2160) pixels for a frame, 3840, 2160 represent the effective display values (Hactive, vactive) of "horizontal" and "vertical", respectively.
The display starts from the upper left of the screen, acquires data of each pixel in a row and displays the data, and jumps to the leftmost side of the next row to start displaying the next row when displaying the rightmost side of the row; when all the rows are displayed, jumping to the upper left starts the next frame. The display scans along a zigzag path, and the horizontal synchronization signal Hsync and the vertical synchronization signal Vsync signal are used to control the skip of the scanning path.
Fig. 3b is a schematic diagram of image data parameters according to an embodiment of the present application. As shown in fig. 3b, assume that the horizontal scanning direction is x and the vertical scanning direction is y. x and y are integers of 0 or more. Fig. 3b shows 1 frame of image data, with the upper left corner set as the origin (0, 0).
The size of the 1-frame image data is specified by the parameters HTOTAL and VTOTAL. HTOTAL is the number of horizontal scanning lines in the horizontal scanning direction, and VTOTAL is the number of vertical scanning lines in the vertical scanning direction. Specifically, as shown in fig. 3c, the number of horizontal scan lines from the rising edge of the vertical synchronization signal VSYNC to the next rising edge is VTOTAL. That is, HTOTAL corresponds to a horizontal scanning period, and VTOTAL corresponds to a vertical scanning period.
Fig. 3c is a schematic diagram of the relationship between the vertical synchronization signal and the data enable signal and the image parameters according to an embodiment of the present application. As shown in fig. 3c, the parameter VSW, VBP, VFP corresponds to a vertical blanking period, i.e., a period in which the data enable signal DE is low in the vertical scanning period. The width (Vertical Sync Width, VSW) of the vertical synchronization signal is the number of horizontal scanning lines during which the vertical synchronization signal VSYNC is high. The number of scanning lines (Vertical Back Porch, VBP) of the vertical trailing edge is the number of horizontal scanning lines from the falling edge of the vertical synchronization signal VSYNC to the rising edge of the data enable signal DE. The number of scanning lines (Vertical Front Porch, VFP) of the vertical front edge is the number of horizontal scanning lines from the falling edge of the data enable signal DE to the rising edge of the vertical synchronization signal VSYNC. Vactive represents the effective display line number of the AA area. VBP corresponds to the vertical trailing edge period and VFP corresponds to the vertical leading edge period.
Wherein Vtotal is the number of vertical scan lines. That is, vtotal= (vactive+vfp+vsw+vbp).
Fig. 4 is a schematic diagram of waveform variation according to an embodiment of the present application. As shown in fig. 4, vactive+vfp+vsw+vbp is a vertical scanning period, the refresh rate (vertical scanning frequency) of the PWM waveform 1 corresponding to the display screen is 120Hz, and the number of pulses corresponding to one vertical scanning period is 4, i.e., the dimming frequency is 480Hz. The refresh rate of the display screen corresponding to the PWM waveform 2 is 96Hz, and the pulse number corresponding to one vertical scanning period is 5, namely the dimming frequency is 480Hz. The refresh rate of the PWM waveform 4 corresponding to the display screen is 60Hz, and the pulse number corresponding to one vertical scanning period is 8, namely the dimming frequency is 480Hz.
It can be seen that, when the display screen is switched to the target dimming mode, the number of pixels (Vtotal) in the vertical scanning direction needs to be divided by the number of pulses corresponding to the target dimming mode, that is, the number of pulses corresponding to one vertical scanning period in the PWM waveform 1, the PWM waveform 2, and the PWM waveform 4 is an integer. For example, the number of pulses corresponding to one vertical scanning period in the PWM waveform 3 is not an integer (as indicated by the dotted circle of the PWM waveform 3), so Vtotal of the PWM waveform 3 cannot be divided by the number of pulses, half of the pulses appear between the end of the first vertical scanning period and the start of the second vertical scanning period of the PWM waveform 3, so that the PWM waveform 3 is disordered, and is reflected in the display effect as continuous flickering of the display screen, so that the problem of flickering occurs.
According to the dimming method for the display screen, when the display screen is switched to the target dimming mode, the number of pixels of an image displayed by the display screen in the vertical scanning direction is an integer multiple of the number of pulses corresponding to the target dimming mode in one vertical scanning period, the frequency range sensitive to human eyes can be avoided, the problem of screen flickering caused by different pulse widths in a fixed period is avoided, the flickering effect of the screen is reduced, and the display effect of the display screen is improved.
In some embodiments, the display screen includes a pixel driving circuit for adjusting the display screen to a screen brightness corresponding to a target dimming mode based on the target dimming mode corresponding to the display screen, including: and controlling the on-off frequency of the switching signal of the pixel driving circuit based on the target dimming mode corresponding to the display screen so as to adjust the display screen to the screen brightness corresponding to the target dimming mode.
The pixel driving circuit may be a 3T1C, 4T1C, 5T2C, 6T1C, 7T1C, or 8T1C structure, for example. The switching signal may be a lighting control signal terminal EM for providing a lighting control signal.
Fig. 5 is a schematic diagram of a pixel driving circuit according to an embodiment of the present application. As shown in fig. 5, the display screen terminal downloads instructions to the integrated circuit (Integrated Circuit, IC) to control the emission control signal terminal EM of the pixel driving circuit. The display screen performs 'on-off-on-off' alternate flickering at a certain frequency by regulating the 'on-off-on-off' frequency of the switching signal EM, and the screen brightness of the display screen is regulated by regulating the 'on' and 'off' time proportion.
Fig. 6 is a flowchart of a dimming method of a display screen according to another embodiment of the present application. As shown in fig. 6, the display screen includes a plurality of different refresh rates, and based on a target dimming mode corresponding to the display screen, the frequency of turning on or off a switching signal of the pixel driving circuit is controlled to adjust the display screen to a screen brightness corresponding to the target dimming mode.
Step 600, determining the number of pulses corresponding to the switching signals of the pixel driving circuit based on the refresh rate and the target dimming mode corresponding to the display screen.
Step 601, adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the number of pulses corresponding to the switching signals of the pixel driving circuit.
The insertion time of the pulse number is between the end of writing the N-th frame image data and the beginning of writing the N+1th frame image data, wherein N is a positive integer.
Fig. 7 is a schematic diagram of waveform variation according to another embodiment of the present application. As shown in fig. 7, the refresh rate of the PWM waveform 5 corresponding to the display screen is 120Hz, the number of pulses corresponding to one vertical scanning period is 3, and the dimming frequency is 360Hz. The refresh rate of the PWM waveform 6 corresponding to the display screen is 90Hz, the pulse number corresponding to one vertical scanning period is 4, and the dimming frequency is 360Hz. The refresh rate of the PWM waveform 7 corresponding to the display screen is 60Hz, the pulse number corresponding to one vertical scanning period is 6, and the dimming frequency is 360Hz.
Therefore, at the moment, the target dimming mode corresponding to the display screen is a 360Hz low-frequency PWM mode, and the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 3 under the 120Hz refresh rate; under the refresh rate of 90Hz, the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 4; at 60Hz refresh rate, the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 6.
Fig. 8 is a schematic diagram of waveform variation according to another embodiment of the present application. As shown in fig. 8, the target dimming mode corresponding to the display screen is a 1440Hz high-frequency PWM mode, and the PWM waveform 8 corresponds to a 160Hz refresh rate, and the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 9; the PWM waveform 9 corresponds to a 120Hz refresh rate, and the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 12; the PWM waveform 10 corresponds to a refresh rate of 80Hz, and the number of pulses corresponding to the switching signals of the pixel driving circuit is determined to be 18.
In some other embodiments, to keep the 360Hz low frequency PWM dimming frequency of the display screen unchanged; the switching signal EM is inserted with 6 pulses at the refresh rate of 60Hz, 4 pulses at the refresh rate of 90Hz, and 3 pulses at the refresh rate of 120Hz, so as to be compatible with different refresh rates. The same applies to the high-frequency PWM dimming frequency locking mode.
In some other embodiments, the display screen is internally provided with two dimming modes of high-frequency PWM and low-frequency PWM at the same time under the same refresh rate, and if the display screen is in an eye-protection scene with darker ambient light, the high-frequency PWM dimming is started; if the outdoor activities are in progress, the standby pilot of the whole machine is required to be improved, and then the low-frequency PWM dimming is switched. For example, at 60Hz refresh rate, if the switching signal EM is inserted into 4 pulses, then this is 240Hz low frequency PWM dimming. At the same 60HZ refresh rate, if the switching signal EM is inserted into 36 pulses, the high-frequency PWM dimming is performed at this time 2160.
According to the dimming method for the display screen, when the display screen corresponds to multiple refresh rates, the preset dimming modes with multiple frequencies can dynamically adjust the pulse number along with the different refresh rates, so that the respective dimming frequencies can be kept unchanged, the display screen terminal can be compatible with the different refresh rates, the use requirements of users are further met, in other words, the display screen corresponds to the same dimming frequency in the same dimming mode.
Fig. 9 is a schematic structural diagram of a dimming device of a display screen according to an embodiment of the present application. As shown in fig. 9, the dimming device 90 includes a determination module 901 and a dimming module 902.
The determining module 901 is configured to determine a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, where the dimming mode is used to adjust screen brightness of the display screen. The dimming module 902 is configured to, based on a target dimming mode corresponding to the display screen, dim the display screen to a screen brightness corresponding to the target dimming mode.
According to the dimming device of the display screen, the target dimming mode corresponding to the display screen can be determined based on the preset dimming modes with multiple frequencies, and the dimming mode is used for adjusting the screen brightness of the display screen; and adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen. Because the dimming modes with multiple frequencies are determined in advance according to the comfort level of the user and the environmental change, compared with the dimming mode with the existing display screen only supporting a single frequency, the dimming method fully considers different individual demands of different users and the environmental light brightness change around the product, can improve the user experience, and also enables the terminal to be more intelligent, thereby further improving the competitiveness of the product.
Next, an electronic device according to an embodiment of the present application is described with reference to fig. 10. Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
As shown in fig. 10, the electronic device 1000 includes a peripheral driving chip and a display screen; the peripheral driver chip includes a memory 1001 and a processor 1002.
By way of example, the electronic device 1000 may be, for example, any product or component having display functionality, such as a mobile terminal, tablet computer, computer display, television, wearable device, or kiosk. The display device includes a display screen as in any embodiment of the present application, and its technical principle and effect are similar, and will not be described herein.
The processor 1002 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device 1000 to perform desired functions.
Memory 1002 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, random Access Memory (RAM) and/or cache memory (cache) and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on a computer readable storage medium and the processor 1002 may execute the program instructions to implement the dimming methods and/or other desired functions of the display screen of the various embodiments of the present application as mentioned above. Various contents such as a dimming mode of a plurality of frequencies set in advance may also be stored in the computer-readable storage medium.
In one example, the electronic device 1000 may further include: an input device 1003 and an output device 1004, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
The input device 1003 may include, for example, a keyboard, a mouse, and the like.
The output device 1004 may output various information to the outside, including target screen brightness, etc. The output 1004 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device 1000 that are relevant to the present application are shown in fig. 10 for simplicity, components such as buses, input/output interfaces, and the like being omitted. In addition, the electronic device 1000 may include any other suitable components depending on the particular application.
In addition to the methods and apparatus described above, embodiments of the present application may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the dimming method of a display screen according to various embodiments of the present application described above in the present specification.
The computer program product may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer-readable storage medium, having stored thereon computer program instructions, which when executed by a processor, cause the processor to perform the steps in the dimming method of a display screen according to various embodiments of the present application described above in the present specification.
A computer readable storage medium may employ 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 include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not intended to be limited to the details disclosed herein as such.
The block diagrams of the devices, apparatuses, devices, systems referred to in this application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent to the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A method for dimming a display screen, comprising:
determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, wherein the dimming mode is used for adjusting the screen brightness of the display screen;
and adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen.
2. The method according to claim 1, wherein the determining the target dimming mode corresponding to the display screen based on the preset dimming modes of the plurality of frequencies includes:
acquiring ambient brightness data outside the display screen;
determining a target dimming mode corresponding to the display screen based on the ambient brightness data and the dimming modes of the plurality of frequencies;
and the target dimming mode is matched with the ambient brightness data outside the display screen.
3. The method of claim 2, wherein the plurality of frequency dimming modes includes a first dimming mode and a second dimming mode, wherein the determining a target dimming mode corresponding to the display screen based on the ambient brightness data and the plurality of frequency dimming modes comprises:
when the display screen switches from a first display scene to a second display scene,
if the ambient brightness data is smaller than or equal to a preset brightness threshold value, determining that a target dimming mode corresponding to the display screen is a first dimming mode;
if the ambient brightness data is larger than the preset brightness threshold value, determining that the target dimming mode corresponding to the display screen is a second dimming mode;
wherein the dimming frequency of the first dimming mode is greater than the dimming frequency of the second dimming mode.
4. A method according to any one of claims 1 to 3, wherein the dimming mode adjusts the screen brightness of the display screen by varying the number of intervening pulses;
when the display screen is switched to the target dimming mode, in one vertical scanning period, the number of vertical scanning lines of the image displayed by the display screen in the vertical scanning direction is an integer multiple of the number of pulses corresponding to the target dimming mode.
5. A method according to any one of claims 1 to 3, wherein the display screen includes a pixel driving circuit, and wherein the adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen includes:
and controlling the on-off frequency of the switching signals of the pixel driving circuit based on the target dimming mode corresponding to the display screen so as to adjust the display screen to the screen brightness corresponding to the target dimming mode.
6. The method of claim 5, wherein the display screen includes a plurality of different refresh rates, and wherein controlling the frequency of switching signals of the pixel driving circuit on or off based on a target dimming mode corresponding to the display screen to adjust the display screen to a screen brightness corresponding to the target dimming mode includes:
determining the pulse number corresponding to the switching signals of the pixel driving circuit based on the refresh rate and the target dimming mode corresponding to the display screen;
adjusting the display screen to the screen brightness corresponding to the target dimming mode based on the pulse number corresponding to the switch signal of the pixel driving circuit;
the insertion time of the pulse number is between the end of writing the N-th frame image data and the beginning of writing the N+1th frame image data, wherein N is a positive integer.
7. A method according to any one of claims 1 to 3, wherein the display screen is in the same dimming mode, and wherein different refresh rates each correspond to the same dimming frequency.
8. A dimming device for a display screen, comprising:
the device comprises a determining module, a display screen display module and a display module, wherein the determining module is used for determining a target dimming mode corresponding to the display screen based on preset dimming modes with multiple frequencies, and the dimming mode is used for adjusting the screen brightness of the display screen;
and the dimming module is used for dimming the display screen to the screen brightness corresponding to the target dimming mode based on the target dimming mode corresponding to the display screen.
9. A storage medium storing a program, characterized in that,
the program, when executed by a processor, implements the dimming method of a display screen of any one of claims 1 to 7.
10. An electronic device comprises a peripheral driving chip and a display screen; the peripheral driver chip includes a memory and a processor, the memory storing a program, characterized in that,
the program, when executed by the processor, causes the processor to perform the dimming method of a display screen according to any one of claims 1 to 7.
CN202311118546.2A 2023-08-31 2023-08-31 Display screen dimming method and device, storage medium and electronic equipment Pending CN117475841A (en)

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Application Number Priority Date Filing Date Title
CN202311118546.2A CN117475841A (en) 2023-08-31 2023-08-31 Display screen dimming method and device, storage medium and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311118546.2A CN117475841A (en) 2023-08-31 2023-08-31 Display screen dimming method and device, storage medium and electronic equipment

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