CN114267276B - Pixel charging method, display panel and display device - Google Patents
Pixel charging method, display panel and display device Download PDFInfo
- Publication number
- CN114267276B CN114267276B CN202111445488.5A CN202111445488A CN114267276B CN 114267276 B CN114267276 B CN 114267276B CN 202111445488 A CN202111445488 A CN 202111445488A CN 114267276 B CN114267276 B CN 114267276B
- Authority
- CN
- China
- Prior art keywords
- screen
- frequency band
- refresh rate
- compensation
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000003990 capacitor Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000005669 field effect Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application relates to the technical field of display, and discloses a pixel charging method, a display panel and a display device, wherein the method comprises the following steps: according to the method, the device and the system, the lifting information of the current screen refresh rate is determined according to the frame frequency signal acquired by the time sequence controller, whether the screen pixel needs to be subjected to charging compensation is judged according to the lifting information, and the screen pixel is subjected to charging compensation according to the current screen refresh rate.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a pixel charging method, a display panel, and a display device.
Background
With the improvement of the living standard of the public, the quality requirements on different display electronic products are higher and higher, the quality requirements on the display screen are also improved, and the requirements of users on the screen are not only large-size, high-refresh rate and high-resolution screens, but also are well known by the public. Therefore, the high refresh rate and high resolution screen are also gradually popularized in the common user group, and the higher the refresh rate of the screen is, the smoother the screen display picture is, because the higher the transmission frame number (FRAMES PER seconds, FPS) per Second of the screen is, the more the picture frame number of the screen displayed in 1s is, and the better the user's viewing experience in actual use is. The existing high refresh rate screen is often required to perform dynamic refresh rate function authentication, namely when the screen is required to perform dynamic refresh rate adjustment, the brightness variation range of the screen cannot exceed the brightness range required by the dynamic refresh rate function authentication. Commercial displays often cause a decay in screen brightness when the screen refresh rate is adjusted, which greatly affects the user experience.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art.
Content of the application
The application mainly aims to provide a pixel charging method, a display panel and a display device, and aims to solve the technical problem that screen brightness is attenuated when a screen refresh rate is adjusted in the prior art.
In order to achieve the above object, the present application provides a pixel charging method comprising the steps of:
determining the lifting information of the current screen refresh rate according to the frame frequency signal acquired by the time sequence controller;
judging whether the screen pixels need to be subjected to charging compensation according to the lifting information;
and when the screen pixels need to be subjected to charging compensation, acquiring the current screen refresh rate from the lifting information.
And carrying out charging compensation on the screen pixels according to the current screen refresh rate.
Optionally, the step of charging and compensating the screen pixel according to the current screen refresh rate includes:
determining a target frequency band to which the current screen refresh rate belongs according to a preset frequency band rule;
Determining the charging compensation time length of the screen pixel according to the target frequency band;
and carrying out charge compensation on the screen pixels based on the charge compensation duration.
Optionally, after the step of determining the target frequency band to which the current screen refresh rate belongs according to the preset frequency band rule, the method further includes:
judging whether the target frequency band is in a preset frequency band range or not;
And if the target frequency band is in the preset frequency band range, executing the step of determining the charging compensation duration of the screen pixel according to the target frequency band.
Optionally, before the step of determining the up-down information of the current screen refresh rate according to the frame frequency signal acquired by the timing controller, the method further includes:
acquiring system board parameters, and determining a screen dynamic frequency range according to the system board parameters;
The method comprises the steps of obtaining the current gray-scale brightness of a screen, and determining a preset frequency range according to the current gray-scale brightness and the dynamic frequency range of the screen.
Optionally, the step of obtaining the current gray-scale brightness of the screen and determining the preset frequency range according to the current gray-scale brightness and the dynamic frequency range of the screen includes:
Acquiring the current gray-scale brightness of a screen, and debugging the screen according to different time sequences according to the current gray-scale brightness and the dynamic frequency range of the screen to obtain a debugging result;
And determining a preset frequency range according to the debugging result.
Optionally, after the step of determining the preset frequency band range according to the debug result, the method further includes:
generating a preset compensation rule according to the debugging result and the preset frequency range;
the step of determining the charging compensation duration of the screen pixel according to the target frequency band comprises the following steps:
And determining the charging compensation duration of the screen pixel according to the preset compensation rule and the target frequency band.
Optionally, the step of determining the lift information of the current screen refresh rate according to the frame frequency signal acquired by the timing controller includes:
Analyzing the detected system board output signal through a time sequence controller to obtain a frame frequency signal;
and acquiring the lifting information of the current screen refresh rate according to the frame frequency signal.
Optionally, the step of determining the preset frequency band range according to the debug result includes:
determining a frequency band demarcation point of the screen according to the debugging result;
And determining a preset frequency band range according to the frequency band demarcation point.
In addition, to achieve the above object, the present application also provides a display panel to which the above pixel charging method is applied.
In addition, in order to achieve the above purpose, the present application also provides a display device, which includes a backlight module and the above display panel, wherein the backlight module is disposed on the back of the display panel, and the backlight module is used for providing a backlight source for the display panel.
According to the application, the lifting information of the current screen refresh rate is determined according to the frame frequency signal acquired by the time sequence controller, whether the screen pixel needs to be charged and compensated is judged according to the lifting information, and the screen pixel is charged and compensated according to the current screen refresh rate. The method comprises the steps of obtaining the lifting information of the screen refresh rate through the frame frequency signal, judging whether the screen pixel needs to be subjected to charging compensation according to the lifting information, and if so, carrying out charging compensation on the screen pixel according to the current screen refresh rate. The method and the device have the advantages that the lifting information of the screen refresh rate is obtained when the refresh rate is switched, and the screen pixels are charged and compensated according to the current refresh rate of the screen, so that the defect of screen brightness attenuation caused by dynamic switching of the refresh rate is avoided, the stability of screen display brightness is ensured, and the screen display effect is improved.
Drawings
FIG. 1 is a flowchart of a pixel charging method according to a first embodiment of the present application;
FIG. 2 is a flowchart of a pixel charging method according to a second embodiment of the present application;
FIG. 3 is a flowchart of a third embodiment of a pixel charging method according to the present application;
FIG. 4 is a timing diagram of a first embodiment of a pixel charging method according to the present application;
FIG. 5 is a schematic diagram of a backlight module in a display device according to the present application;
fig. 6 is a schematic diagram of a pixel charging method applied to a pixel charging display panel according to the present application.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Data receiver | 20 | Comparator with a comparator circuit |
| 30 | Time sequence controller | 40 | Time sequence temporary storage |
| 50 | Driving IC | 60 | Display panel |
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1, fig. 1 is a flowchart of a pixel charging method according to a first embodiment of the application.
It should be noted that when the screen is reduced from a high refresh rate to a low refresh rate, the charging time of the pixels of the screen is unchanged, but the waiting time of pixel processing between each frame of display picture of the screen is prolonged, so that the thin film field effect transistor generates electric leakage, and therefore, the brightness of the screen is attenuated, the lower the screen refresh rate is, the more serious the electric leakage of the thin film field effect transistor is, the more serious the brightness attenuation is, and the viewing experience of a user when the screen is used is very affected. Therefore, the present embodiment proposes a pixel charging method, which determines the current screen refresh rate up-down information according to the frame frequency signal acquired by the timing controller, then determines the charging compensation time of the screen pixel according to the screen refresh rate up-down information, and performs charging compensation on the screen pixel according to the charging compensation time, so as to reduce the attenuation of the screen brightness.
Step S10: and determining the lifting information of the current screen refresh rate according to the frame frequency signal acquired by the time sequence controller.
It should be noted that, the execution body of the embodiment may be a pixel charging device, where the pixel charging device may be a microcontroller or an integrated chip, or may be other pixel charging devices that may implement the same or similar functions, which is not limited in this embodiment.
It should be appreciated that when a user uses a screen with a dynamic frequency range of 48Hz-165Hz, because hardware devices such as a graphics processor (Graphic Processing Unit, GPU) or a central processing unit (Central Processing Unit, CPU) of the user are insufficient to drive the screen when the screen refresh rate is 165Hz, the current refresh rate of the screen needs to be dynamically adjusted to a lower frequency range such as 120Hz or 100Hz, and in the process of dynamically adjusting the screen refresh rate, since the screen is reduced from a high frequency refresh rate to a low frequency refresh rate, luminance degradation occurs to the screen, resulting in poor viewing experience when the screen is used.
The frame frequency signal refers to a signal obtained by analyzing and acquiring the detected output signal of the system board by a time sequence circuit controller (TCON). The screen refresh rate up-down information, which refers to the change condition of the screen refresh rate in the dynamic change range, can be obtained by analyzing the frame frequency signal. For example, the last screen refresh rate and the current screen refresh rate are obtained through the frame frequency signal, so as to judge whether the screen refresh rate is increased or decreased, and when the last screen refresh rate is greater than the current refresh rate, the screen refresh rate is decreased; when the last refresh rate of the screen is smaller than the current refresh rate, the screen refresh rate is increased.
Step S20: judging whether the screen pixels need to be subjected to charging compensation according to the lifting information.
It should be understood that whether the screen refresh frequency is down-converted is judged according to the lifting information, and if fluctuation of the current screen refresh rate is detected, the screen pixels are judged to need to be subjected to charging compensation at the moment; if the current screen refresh rate does not fluctuate, the screen pixels are judged not to need charging compensation.
Step S30: and when the screen pixels need to be subjected to charging compensation, acquiring the current screen refresh rate from the lifting information.
It should be noted that, the current screen refresh rate refers to the number of frames (FRAMES PER seconds, FPS) transmitted per Second by the screen at the current time, the higher the number of frames transmitted per Second by the screen, the shorter the processing time between each frame displayed by the screen, and the shorter the charge retention time of the screen pixels, so that the leakage situation is less likely to occur; the lower the number of frames transmitted per second for the current screen, the longer the processing time between each frame of the screen display, and the longer the charge retention time of the screen pixels, and therefore the more likely the leakage condition occurs, resulting in a decay in screen brightness. Therefore, whether the screen refresh rate is reduced can be judged through the lifting information, and if the screen refresh rate is reduced, charging compensation is needed for the screen pixels.
In a specific implementation, the pixel charging device judges whether the screen refresh rate is reduced through the lifting information, if the screen refresh rate is reduced, the current screen refresh rate can be obtained from the lifting information at the moment, if the current screen refresh rate is in a preset frequency band range, the screen pixel is subjected to charge compensation, and if the current screen refresh rate is not in the preset frequency band range, the screen pixel is not required to be subjected to charge compensation. For example, if the current screen refresh rate is 50Hz and the preset frequency range is 30Hz-60Hz, the current screen refresh rate is within the preset frequency range, and charging compensation is performed on the screen pixels.
Step S30: and carrying out charging compensation on the screen pixels according to the current screen refresh rate.
It should be noted that the charge compensation for the screen pixel refers to the charge compensation for the capacitance of the screen pixel, so as to compensate for the leakage of the capacitance of the screen pixel caused by the too low screen refresh rate, and the longer the charge time, the more saturated the charge of the capacitance of the screen pixel.
It should be understood that the lower the refresh rate of the screen, the fewer the number of frames displayed per second of the screen, and the fewer the number of frames displayed per second of the screen, the longer the processing time between each frame of display, and the longer the processing time between each frame of display, the longer the charge retention time of the screen pixel capacitor, and the lower the refresh rate, the more serious the screen pixel capacitor leakage, and the more serious the screen brightness attenuation service is caused by the screen pixel capacitor leakage.
In a specific implementation, the pixel charging device performs charging compensation on the screen pixels according to the screen refresh rate acquired by the frame frequency signal, for example, if the screen refresh rate acquired by the frame frequency signal is greater than 70Hz, the charging compensation is performed on the screen pixels with the charging time of t 1; if the screen refresh rate obtained through the frame frequency signal is smaller than 70Hz, charging compensation is carried out on the screen pixels, wherein the charging time t2 is smaller than t1, namely, the charging time when the screen refresh rate is smaller than 70Hz is longer than the charging time when the screen refresh rate is larger than 70 Hz.
According to the application, the lifting information of the current screen refresh rate is determined according to the frame frequency signal acquired by the time sequence controller, whether the screen pixel needs to be charged and compensated is judged according to the lifting information, and the screen pixel is charged and compensated according to the current screen refresh rate. The method comprises the steps of obtaining the lifting information of the screen refresh rate through the frame frequency signal, judging whether the screen pixel needs to be subjected to charging compensation according to the lifting information, and if so, carrying out charging compensation on the screen pixel according to the current screen refresh rate. The method and the device have the advantages that the lifting information of the screen refresh rate is obtained when the refresh rate is switched, and the screen pixels are charged and compensated according to the current refresh rate of the screen, so that the defect of screen brightness attenuation caused by dynamic switching of the refresh rate is avoided, the stability of screen display brightness is ensured, and the screen display effect is improved.
Further, in order to more accurately perform charge compensation on the screen pixels, the foregoing step S10 is preceded by:
acquiring system board parameters, and determining a screen dynamic frequency range according to the system board parameters;
The method comprises the steps of obtaining the current gray-scale brightness of a screen, and determining a preset frequency range according to the current gray-scale brightness and the dynamic frequency range of the screen.
It should be noted that, the system board parameters refer to parameter information of a main board of the screen, and the system board parameters include, but are not limited to: the parameters of the screen such as the dynamic frequency range of the screen, the gray scale brightness range of the screen, the color gamut of the screen (the color gamut of the screen has different parameter evaluations according to different color gamut standards), the color depth of the screen, the resolution of the screen, the pixel point distance of the screen, the power consumption of the screen, the panel information of the screen, the production date of the screen, the manufacturer of the screen and the like. The current gray-scale brightness refers to the brightness level of the current screen, for example, a screen with 8bit color depth can display 256 gray-scale brightness, wherein the lowest brightness is 0 gray and the highest brightness is 255 gray, which is not limited in this embodiment.
The screen color depth refers to the color bit depth of the screen, the higher the color depth, the richer the color brightness of the screen display, for example, the screen with 8bit color depth can display 256 gray scale brightness, the screen with 10bit color depth can display 1024 gray scale brightness, the screen with 12bit color depth can display 4096 gray scale brightness, in this embodiment, the screen with 8bit color depth has different brightness variation specifications, for example, the brightness variation of the screen with 8bit color depth cannot exceed 0.04nits/Hz when the gray scale brightness is 127, and the brightness variation cannot exceed 0.03nits/Hz when the gray scale brightness is 255.
It should be noted that the screen dynamic band range refers to a refresh rate range in which the screen can be dynamically adjusted, for example, a screen with a dynamic band range of 48Hz-165Hz, and the screen refresh rate can be manually or automatically adjusted to the minimum 48Hz or the maximum 165Hz. The refresh rate refers to the number of times the electron beam repeatedly scans an image on the screen, and for example, a 75Hz refresh rate refers to the screen 1s that can display 75 frames, wherein the display time of each frame is 1/75s.
Further, in order to accurately acquire the up-down information of the screen refresh rate, the step S10 further includes:
Analyzing the detected system board output signal through a time sequence controller to obtain a frame frequency signal;
and acquiring the lifting information of the current screen refresh rate according to the frame frequency signal.
The time sequence controller is a screen control driving circuit for detecting and analyzing an original signal output by the system board, and converts the original data input signal output by the system into a frame frequency signal containing screen refresh rate information. The system board output signal refers to an original data signal output by the system board, and the system board output signal includes a screen frame frequency signal, an RGB data signal, a clock signal, a control signal, and the like.
In a specific implementation, a time sequence controller analyzes a detected original data signal output by a system board to obtain a frame frequency signal, the frame frequency signal is used for obtaining lifting information of a screen refresh rate to determine whether the screen refresh rate is reduced, if the current screen refresh rate is in a low frequency band and the screen refresh rate is determined to be reduced through the frame frequency signal, the charging compensation duration of a screen pixel is determined according to a preset compensation rule, and charging compensation is performed on the screen pixel.
Referring to fig. 2, fig. 2 is a flowchart of a second embodiment of a pixel charging method according to the present application.
Based on the first embodiment, in this embodiment, the step S30 includes:
Step S301: and determining the target frequency band to which the current screen refresh rate belongs according to a preset frequency band rule.
It should be noted that, the preset frequency band rule refers to a rule set in advance according to the quality of the screen, the system parameter, and the dynamic refresh rate range to distinguish whether charging compensation is needed, and the preset frequency band rule may be obtained through factory debugging of the screen, or may be manually debugged according to the system parameter when the user uses the screen for the first time, which is not limited in this embodiment.
The target frequency band is divided according to parameters of the screen and preset frequency band rules, and is divided into a frequency band needing charging compensation and a frequency band needing no charging compensation, for example, a frequency band needing charging compensation of the screen with a dynamic frequency band range of 48Hz-165Hz is 48Hz-100Hz, the frequency band needing no charging compensation is 100Hz-165Hz, and if the current screen refresh rate is 65Hz, the target frequency band to which the current screen refresh rate belongs is 48Hz-100Hz, so that the screen pixels need to be charged and compensated.
The frequency band needing charging compensation is specifically subdivided into a plurality of different charging compensation powers according to the quality of the screen, for example, the frequency band needing charging compensation for a screen with a dynamic frequency band range of 48Hz-165Hz is 48Hz-100Hz, and the charging compensation power of 48Hz-60Hz is greater than the charging compensation power of 60Hz-100 Hz.
It should be noted that the refresh rate frequency range in which charge compensation is required is typically a low frequency range, and when the screen is in a relatively low frequency range, the processing time period (blank area) between each frame of screen display is relatively long in a relatively high frequency range. For example, a screen with a dynamic frequency range of 48Hz-165Hz requires charge compensation to be 48Hz-100Hz because the screen displays one frame for 1/48s when the screen is at the 48Hz refresh rate and about 1/165s when the screen is at the 165Hz refresh rate, so the blank period is much longer than 165Hz when the screen is at the 48Hz refresh rate; when the screen is in the blank area, the capacitance of the screen pixel will leak, and the longer the screen blank area is, the more serious the capacitance of the screen pixel will leak. Therefore, when the screen is at the refresh rate of the low frequency band, the capacitance of the screen pixel needs to be charged and compensated, and the longer the charging time is, the more saturated the capacitance of the screen pixel is.
It should be noted that, the pixel point to be actually displayed on the FHD resolution screen is 1920×1080, where each line has 1920 pixels, and there are 1080 lines in total, the screen is scanned line by line to display an image when actually displaying a frame of picture, and the screen needs to perform data processing before displaying the next frame of picture after scanning 1080 lines, and the time of the data processing is called a blank area, because the screen does not actually display a picture at this time.
The lower the screen refresh rate, the longer the processing time between each frame of display, the longer the blank space time, the more the thin film field effect transistor (Thin Film Transistor, TFT) of the screen leaks, and the more the luminance of the screen decays.
In a specific implementation, the pixel charging device determines that the refresh rate of the current screen is 50Hz, the dynamic frequency range of the current screen is 48Hz-165Hz, and the frequency range of the current screen, which needs to be compensated for charging, is determined to be 48Hz-72Hz according to a preset frequency range rule, so that the target frequency range to which the refresh rate of the current screen belongs can be determined to be the frequency range which needs to be compensated for charging.
Further, in order to determine whether the screen pixel needs charge compensation more precisely, after the step S301, the method further includes:
judging whether the target frequency band is in a preset frequency band range or not;
And if the target frequency band is in the preset frequency band range, executing the step of determining the charging compensation duration of the screen pixel according to the target frequency band.
It should be noted that the preset frequency range refers to a frequency range to be compensated, which is preset, and the preset frequency range is a low frequency range of a screen refresh rate, for example, a frequency range to be charged and compensated for a screen with a dynamic frequency range of 48Hz-165Hz may be determined to be 48Hz-100Hz according to a preset frequency rule, and then the preset frequency range and the low frequency range of the screen are 48Hz-100Hz.
It should be understood that if the target frequency band is within the preset frequency band range, the current screen pixel needs to be subjected to charging compensation, so that the situation that the screen brightness is attenuated due to the low-frequency band refresh rate is avoided, for example, the current screen refresh rate is 65Hz, the target frequency band to which the current screen refresh rate belongs is determined to be the low-frequency band according to the preset frequency band rule, and the target frequency band to which the current screen refresh rate belongs is within the preset frequency band range, so that the capacitance of the current screen pixel needs to be subjected to charging compensation.
In specific implementation, determining a target frequency band to which a current screen refresh rate belongs according to a preset frequency band rule, judging whether the target frequency band is in a preset frequency band range, and if the target frequency band is in the preset frequency band range, determining the charging compensation duration of the screen pixels according to the target frequency band; if the target frequency band is not in the preset frequency band range, the pixels are not required to be charged.
Step S302: and determining the charging compensation time length of the screen pixel according to the target frequency band.
It should be noted that the charging compensation duration refers to a duration of charging the leaked screen pixel capacitor according to a preset charging compensation rule and a current screen refresh rate, where the longer the charging time is, the more saturated the charge amount in the capacitor of the screen pixel is, so as to compensate for the screen brightness attenuation caused by the leakage of the capacitor.
The lower the screen refresh rate, the more serious the luminance decay is, and therefore the lower the screen refresh rate, the longer the charge compensation period required for the screen pixel capacitance, for example, the period of time required for charge compensation is t1 when the current screen refresh rate is 48Hz, and the period of time required for charge compensation is t2 when the current screen refresh rate is 100Hz, where t1 is greater than t2, and the period of time required for charge compensation is greater when the screen refresh rate is 48Hz than when the screen refresh rate is 100 Hz.
Step S303: and carrying out charge compensation on the screen pixels based on the charge compensation duration.
It should be noted that, when the refresh rate of the screen segment is at a high frequency, the blank area between each frame of display picture of the screen is smaller, the capacitance leakage of the screen pixel is less, and the brightness attenuation is also smaller, so that the screen at the refresh rate of the high frequency segment does not need to be compensated for by charging.
In a specific implementation, the pixel charging device determines that the dynamic frequency range of the current screen is 30Hz-120Hz according to the system board parameters of the current screen, obtains the refresh rate of the current screen to be 52Hz according to the lifting information, determines that the target frequency range to which the refresh rate of the current screen belongs is a low frequency range to be charged and compensated according to the preset frequency range rule, determines the compensation time length of the screen pixels according to the preset compensation rule, and performs charging compensation on the screen pixels based on the charging compensation time length.
According to the method and the device, the target frequency band to which the current screen refresh rate belongs is determined according to the preset frequency band rule, the charging compensation duration of the screen pixels is determined according to the target frequency band, the screen pixels are subjected to charging compensation based on the charging compensation duration, and the charging compensation duration of the screen pixels and the charging compensation of the screen pixels are determined according to the preset frequency band rule, so that the pixel charging can be accurately performed according to the current screen refresh rate, the defect that brightness is attenuated due to the fact that the pixel capacitor leaks electricity on the screen is avoided, and the viewing experience of the screen is improved.
Referring to fig. 3, fig. 3 is a flowchart illustrating a pixel charging method according to a third embodiment of the application.
Based on the above first embodiment, in this embodiment, the step of obtaining the current gray-scale brightness of the screen and determining the preset frequency band range according to the current gray-scale brightness and the dynamic frequency band range of the screen includes:
step S101: acquiring the current gray-scale brightness of a screen, and debugging the screen according to different time sequences according to the current gray-scale brightness and the dynamic frequency range of the screen to obtain a debugging result.
It should be noted that the time sequence refers to a sequence of charging time periods of the capacitor of the screen pixel, and according to the current gray-scale brightness and the dynamic frequency range of the screen, the screen performs charging compensation debugging on the capacitor of the screen pixel one by one according to different charging time periods under different gray-scale brightness and different screen refresh rates.
Step S102: and determining a preset frequency range according to the debugging result.
It should be noted that the preset frequency band range refers to a preset frequency band range of a screen refresh rate, where charging compensation is required for a screen pixel capacitor, and the preset frequency band range is a low frequency band range of the screen refresh rate, for example, according to a preset frequency band rule, it may be determined that a frequency band of a screen with a dynamic frequency band range of 48Hz-165Hz, where charging compensation is required, is 48Hz-100Hz, and then the preset frequency band range and the low frequency band range of the screen are 48Hz-100Hz.
It should be noted that, according to the quality of the screen and the parameters of the screen, the refresh rate frequency band of the screen pixels to be charged and compensated is different, for example, if the screen with the dynamic frequency band range of 60Hz-144Hz has brightness attenuation with different degrees in the frequency band of 60Hz-90Hz, the refresh rate frequency band of the screen to be charged and compensated is 60Hz-90Hz; if brightness attenuation of different degrees occurs in a screen with a dynamic frequency range of 48Hz-120Hz in a frequency range of 48Hz-75Hz, the refresh rate frequency range of the screen needing charging compensation is 48Hz-75Hz; if brightness attenuation occurs to different degrees in the 48Hz-100Hz frequency band of the screen with the dynamic frequency band range of 48Hz-165Hz, the refresh rate frequency band of the screen requiring charging compensation is 48Hz-100Hz, and the embodiment is not limited.
As shown in fig. 4, fig. 4 is a timing debugging schematic diagram of the present embodiment, in the present embodiment, taking a screen with a dynamic frequency range of 48Hz-165Hz as an example, the refresh rate of the screen is divided into 3 frequency bands by timing debugging: the time length of the blank area of the 48Hz-60Hz frequency band is T1, the time length of the blank area of the 60Hz-100Hz frequency band is T2, the time length of the blank area of the T3 frequency band is 100Hz-165Hz frequency band is T3. The 48Hz-60Hz frequency band and the 60Hz-100Hz frequency band are low frequency bands, and the blank area is long, so that charging compensation is needed, and the charging compensation time needed by the 48Hz-60Hz frequency band is longer than that of the 60Hz-100Hz frequency band, so that T1 is longer than T2; the frequency range of 100Hz-165Hz is a high frequency range, and the time length T3 of the blank area is shorter, so that charging compensation is not needed.
In a specific implementation, for example, a screen with a dynamic frequency range of 48Hz-165Hz and a color depth of 8bit performs timing debugging on a frequency range with different refresh rates under 127 gray-scale brightness, and determines that brightness attenuation occurs when the refresh rate of the screen is 48Hz-60Hz and 60Hz-100Hz according to the debugging result, so that charging compensation is required, thereby determining a preset frequency range.
Further, in order to determine the preset frequency range of the screen, after the step S102, the method further includes:
and generating a preset compensation rule according to the debugging result and the preset frequency range.
The step of determining the charging compensation duration of the screen pixel according to the target frequency band comprises the following steps:
And determining the charging compensation duration of the screen pixel according to the preset compensation rule and the target frequency band.
It should be noted that, the preset compensation rule refers to a charge compensation duration rule corresponding to different frequency bands preset according to a debugging result and a preset frequency band range, where the preset compensation rule includes each refresh rate frequency band of the screen that needs charge compensation and a charge compensation duration corresponding to each refresh rate frequency band.
In a specific implementation, for example, according to a timing sequence debugging result, a screen with a dynamic frequency range of 48Hz-165Hz and a color depth of 8bit is in 127 gray scales, and the time length required for charging compensation is t1 when the screen refresh rate is 48Hz-60 Hz; the time length of charging compensation required when the screen refresh rate is in the frequency range of 60Hz-75Hz is t2; the time length of charging compensation required when the screen refresh rate is 75Hz-100Hz frequency band is t3; charging compensation is not needed when the screen refresh rate is in the frequency range of 100Hz-165 Hz. The charging compensation time period t1 is longer than the charging compensation time period t2, and the charging compensation time period t2 is longer than the charging compensation time period t3.
Further, in order to determine the preset frequency band range of the screen, the step S102 further includes:
determining a frequency band demarcation point of the screen according to the debugging result;
And determining a preset frequency band range according to the frequency band demarcation point.
It should be noted that, the frequency band demarcation point refers to a demarcation point of a high frequency band and a low frequency band of the screen refresh rate, and the frequency band demarcation point is used to distinguish whether the screen pixels need to be charged and compensated under different refresh rates, for example, a dynamic frequency band range is 48Hz-165Hz, if the frequency band demarcation point is 100Hz, 48Hz-100Hz is the low frequency band refresh rate, and 100Hz-165Hz is the high frequency band refresh rate. When the current screen refresh rate is in a low frequency band, charging compensation is needed; when the current screen refresh rate is in the high frequency band, the screen pixels do not need to be charge-compensated.
In a specific implementation, the pixel charging device determines a frequency band demarcation point of the screen according to the debugging result, and determines a preset frequency band range according to the frequency band demarcation point, so as to determine a low frequency band range and a high frequency band range of the screen refreshing rate, wherein the low frequency band range and the high frequency band range are the high frequency band when the screen refreshing rate is higher than the frequency band demarcation point, and the low frequency band when the screen refreshing rate is lower than the frequency band demarcation point. The screen refresh rate is in a low frequency range and does not need to be subjected to charging compensation, for example, a screen with a dynamic frequency range of 60Hz-244Hz is not required to be subjected to charging compensation when the screen refresh rate is in a high frequency range, if the frequency range division point is 120Hz, a frequency range lower than 120Hz is a low frequency range, and a frequency range higher than 120Hz is a high frequency range, wherein the low frequency range is 60Hz-120Hz, and when the screen refresh rate is in the low frequency range, the screen pixels need to be subjected to charging compensation; the high frequency range is 120Hz-244Hz, and when the screen refreshing rate is in the high frequency range, charging compensation is not needed for screen pixels, so that after the low frequency range and the high frequency range of the screen refreshing rate are determined, the preset frequency range of the screen is determined to be 60Hz-120Hz.
According to the method, the device and the system, the current gray-scale brightness of the screen is obtained, the screen is debugged according to different time sequences according to the current gray-scale brightness and the dynamic frequency range of the screen, a debugging result is obtained, then the preset frequency range is determined according to the debugging result, the screen is debugged according to the time sequences according to the gray-scale brightness and the dynamic frequency range of the screen, the preset frequency range is determined according to the debugging result, and the screen pixels can be more accurately subjected to charge compensation under different refresh rates, so that the defect of screen brightness attenuation caused by refresh rate reduction is avoided, and user experience is improved.
In addition, to achieve the above object, the present application also provides a display panel 60, the display panel 60 being applied to the pixel charging method described above.
In addition, in order to achieve the above objective, the present application further provides a display device, which includes a backlight module and the above display panel 60, wherein the backlight module is disposed on the back surface of the display panel 60, and the backlight module is used for providing a backlight source for the display panel 60.
It should be noted that, referring to fig. 5, fig. 5 is a schematic structural diagram of the backlight module. The backlight module comprises: the display device comprises a data receiver 10, a comparator 20, a time schedule controller 30, a time schedule register 40 and a drive IC50, wherein the data receiver 10 is connected with the comparator 20, the comparator 20 is connected with the time schedule controller 30, the time schedule controller 30 is connected with the time schedule register 40, and the drive IC50 is respectively connected with the time schedule controller 30 and a display panel 60.
In the embodiment, referring to fig. 6, fig. 6 is a flow chart of the above-mentioned backlight module and display panel 60 applied to the above-mentioned pixel charging method. The data receiver 10 transmits the current frequency to the comparator 20 upon receiving the front-end data. The comparator 20 determines the frequency range of the current frequency from the current frequency and sends the frequency-belonging range to the timing controller 30. The timing controller 30 retrieves the corresponding timing through the timing register 40 and outputs the timing to the driving IC50. Upon receiving the timing output, the driver IC50 transmits the charging voltage and time to the display panel 60.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the terms first, second, third, etc. do not denote any order, but rather the terms first, second, third, etc. are used to interpret the terms as names.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (7)
1. A pixel charging method, comprising the steps of:
determining the lifting information of the current screen refresh rate according to the frame frequency signal acquired by the time sequence controller;
judging whether the screen pixels need to be subjected to charging compensation according to the lifting information;
When the screen pixels need to be subjected to charging compensation, the current screen refresh rate is obtained from the lifting information;
Charging compensation is carried out on the screen pixels according to the current screen refresh rate;
Before the step of determining the up-down information of the current screen refresh rate according to the frame frequency signal acquired by the time sequence controller, the method further comprises the following steps:
acquiring system board parameters, and determining a screen dynamic frequency range according to the system board parameters;
Acquiring the current gray-scale brightness of a screen, and determining a preset frequency range according to the current gray-scale brightness and the dynamic frequency range of the screen;
The step of obtaining the current gray-scale brightness of the screen and determining a preset frequency range according to the current gray-scale brightness and the dynamic frequency range of the screen comprises the following steps:
Acquiring the current gray-scale brightness of a screen, and debugging the screen according to different time sequences according to the current gray-scale brightness and the dynamic frequency range of the screen to obtain a debugging result;
Determining a preset frequency range according to the debugging result;
After the step of determining the preset frequency band range according to the debugging result, the method further comprises the following steps:
Generating a preset compensation rule according to the debugging result and the preset frequency band range, wherein the preset compensation rule is a charging compensation duration rule which is preset according to the debugging result and the preset frequency band range and corresponds to different frequency bands, and the frequency bands and the charging compensation duration are in inverse relation;
The step of charging compensation for the screen pixels according to the current screen refresh rate includes:
and determining the charge compensation duration of the screen pixel according to the preset compensation rule and the target frequency band to which the current screen refresh rate belongs.
2. The pixel charging method of claim 1, wherein the step of charging compensation of the screen pixels according to the current screen refresh rate comprises:
determining a target frequency band to which the current screen refresh rate belongs according to a preset frequency band rule;
Determining the charging compensation time length of the screen pixel according to the target frequency band;
and carrying out charge compensation on the screen pixels based on the charge compensation duration.
3. The pixel charging method according to claim 2, wherein after the step of determining the target frequency band to which the current screen refresh rate belongs according to a preset frequency band rule, the method further comprises:
judging whether the target frequency band is in a preset frequency band range or not;
And if the target frequency band is in the preset frequency band range, executing the step of determining the charging compensation duration of the screen pixel according to the target frequency band.
4. The pixel charging method as claimed in claim 1, wherein the step of determining the up-down information of the current screen refresh rate based on the frame rate signal acquired by the timing controller comprises:
Analyzing the detected system board output signal through a time sequence controller to obtain a frame frequency signal;
and acquiring the lifting information of the current screen refresh rate according to the frame frequency signal.
5. The pixel charging method according to claim 1, wherein the step of determining a preset frequency band range according to the debug result comprises:
determining a frequency band demarcation point of the screen according to the debugging result;
And determining a preset frequency band range according to the frequency band demarcation point.
6. A display panel, wherein the pixel charging method according to any one of claims 1 to 5 is applied to the display panel.
7. A display device, comprising a backlight module and the display panel according to claim 6, wherein the backlight module is disposed on the back surface of the display panel, and the backlight module is configured to provide a backlight source for the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445488.5A CN114267276B (en) | 2021-11-30 | 2021-11-30 | Pixel charging method, display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445488.5A CN114267276B (en) | 2021-11-30 | 2021-11-30 | Pixel charging method, display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114267276A CN114267276A (en) | 2022-04-01 |
| CN114267276B true CN114267276B (en) | 2024-06-25 |
Family
ID=80825927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111445488.5A Active CN114267276B (en) | 2021-11-30 | 2021-11-30 | Pixel charging method, display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114267276B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110751933A (en) * | 2019-12-04 | 2020-02-04 | 京东方科技集团股份有限公司 | Display method and device for refresh rate switching, computer equipment and medium |
| CN111312145A (en) * | 2020-03-03 | 2020-06-19 | 昆山国显光电有限公司 | Display and driving method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105103214B (en) * | 2013-01-14 | 2018-06-08 | 苹果公司 | Low-power with variable refresh rate shows equipment |
| KR102615596B1 (en) * | 2018-11-08 | 2023-12-20 | 삼성전자주식회사 | A display apparatus and a control method thereof |
| CN111816133A (en) * | 2020-07-07 | 2020-10-23 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display and leakage compensation method thereof |
| CN112133239A (en) * | 2020-09-27 | 2020-12-25 | 昆山国显光电有限公司 | Compensation voltage determination method and device and display device |
| CN113393818B (en) * | 2021-06-17 | 2022-08-05 | 深圳市华星光电半导体显示技术有限公司 | Adjusting method and adjusting device of display panel |
| CN113658567B (en) * | 2021-08-31 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Method for adjusting screen flicker, related device and storage medium |
-
2021
- 2021-11-30 CN CN202111445488.5A patent/CN114267276B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110751933A (en) * | 2019-12-04 | 2020-02-04 | 京东方科技集团股份有限公司 | Display method and device for refresh rate switching, computer equipment and medium |
| CN111312145A (en) * | 2020-03-03 | 2020-06-19 | 昆山国显光电有限公司 | Display and driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114267276A (en) | 2022-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7339565B2 (en) | Method and apparatus for driving liquid crystal display device | |
| CN111640390A (en) | Display screen flicker adjusting circuit and method and display device | |
| CN108766372B (en) | Method for improving mura phenomenon of display panel | |
| EP1780690B1 (en) | Flat display apparatus and picture quality controlling method based on panel defects | |
| US8217880B2 (en) | Method for driving liquid crystal display apparatus | |
| US20150348471A1 (en) | Backlight adjustment method, backlight adjustment system and display device | |
| US20090066632A1 (en) | Processing device and processing method for high dynamic constrast of liquid crystal display device | |
| US7817169B2 (en) | Display device | |
| US20130038621A1 (en) | Display device and driving method thereof | |
| KR101359920B1 (en) | Driving apparatus for display device, display device including the same and driving method of display device | |
| EP3516646B1 (en) | Apparatus for enhancing brightness uniformity of displayed image, display apparatus, and method for displaying image | |
| US20110025726A1 (en) | Hold-type image display apparatus and display method using the hold-type image display apparatus | |
| US20080246784A1 (en) | Display device | |
| US20080024409A1 (en) | Display Device, Display Device Adjustment Method, Image Display Monitor, and Television Receiver | |
| CN115565503B (en) | Image processing method, device, storage medium and display device | |
| US9129572B2 (en) | Display device and related method | |
| US20180130433A1 (en) | Control device, display device, control method, and control program | |
| JP2008256841A (en) | Display device | |
| CN110648640B (en) | Pixel compensation method, pixel compensation device and display device | |
| US20080079673A1 (en) | Driving method for LCD and apparatus thereof | |
| KR101348700B1 (en) | Liquid crystal display device and method of driving the same | |
| EP1903545A2 (en) | Display device | |
| US20090096740A1 (en) | Liquid Crystal Display Device and Apparatus and Method for Controlling Luminance of Liquid Crystal Panel Thereof | |
| CN114267276B (en) | Pixel charging method, display panel and display device | |
| US9443489B2 (en) | Gamma curve compensating method, gamma curve compensating circuit and display system using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |