CN114677981B - Charging compensation method and charging compensation device - Google Patents

Charging compensation method and charging compensation device Download PDF

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Publication number
CN114677981B
CN114677981B CN202210314245.6A CN202210314245A CN114677981B CN 114677981 B CN114677981 B CN 114677981B CN 202210314245 A CN202210314245 A CN 202210314245A CN 114677981 B CN114677981 B CN 114677981B
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compensated
pixel unit
data signal
pixel
scanning signal
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CN114677981A (en
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田秋玲
唐福林
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology Co Ltd
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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
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • 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

Abstract

The application relates to a charge compensation method and a charge compensation device, wherein the method comprises the following steps: detecting a first scanning signal and a first data signal which are currently corresponding to at least one pixel unit to be compensated; determining the current charging time of each pixel unit to be compensated; obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the current charging time; and driving each pixel unit to be compensated according to the second scanning signal and the second data signal corresponding to each pixel unit to be compensated. According to the method and the device, the first scanning signal and the first data signal are detected at first, then the current charging time is determined, then the second scanning signal and the second data signal are obtained through adjustment, each pixel unit to be compensated is driven finally, the phenomenon of variation of the scanning signal of each pixel unit to be compensated can be compensated, the risk of insufficient charging is reduced, the phenomenon of uneven display is improved, and the taste of a display is guaranteed.

Description

Charging compensation method and charging compensation device
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a charging compensation method and a charging compensation device.
Background
Liquid crystal displays (Liquid Crystal Display, LCDs) are currently the dominant display technology in the market due to their high brightness, long life, wide viewing angle, large size display, etc. In recent years, with the rapid development of the semiconductor display industry, new technologies such as AM-OLED, micro-LED and the like have threatened LCDs in small and medium size fields, but LCDs still occupy an immovable position in large size display fields by virtue of their mature technologies and manufacturing processes.
In the related art, since the liquid crystal display panel works for a long time, the performance of the driving transistor is poor and the characteristics (such as threshold voltage or mobility) of the driving transistor itself are changed, so that the gate pulse (or scanning pulse) output by the GOA unit is changed, and thus, each pixel unit of the display may have a risk of insufficient charging, a phenomenon of uneven display is generated, and the display quality is affected.
Disclosure of Invention
In view of this, the present application provides a charge compensation method and a charge compensation device, which can compensate the phenomenon of variation of scanning signals generated by the performance variation of the thin film transistor of each pixel unit to be compensated, reduce the risk of insufficient charge of each pixel unit to be compensated, further improve the phenomenon of uneven display, and ensure the taste of the display.
According to an aspect of the present application, there is provided a charge compensation method applied to a display including a pixel cell array including a plurality of pixel cells arranged in a row and column form, the charge compensation method including: detecting a first scanning signal and a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array; determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal; according to the current charging time of each pixel unit to be compensated, corresponding first scanning signals and first data signals are adjusted, and second scanning signals and second data signals corresponding to each pixel unit to be compensated are obtained; and driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
Further, detecting a first scan signal and a first data signal currently corresponding to at least one pixel to be compensated in the pixel unit array includes: detecting the falling edge of a first scanning signal corresponding to at least one pixel unit to be compensated in the pixel unit array; detecting the rising edge of a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array.
Further, determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal includes: determining the current charging time of each pixel unit to be compensated according to the falling edge of the first scanning signal corresponding to each pixel unit to be compensated in the at least one pixel unit to be compensated and the rising edge of the first data signal corresponding to the pixel unit to be compensated.
Further, according to the current charging time of each pixel unit to be compensated, adjusting the corresponding first scanning signal and the first data signal to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, including: adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated; and obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted duty ratio of each first scanning signal and/or the adjusted duty ratio of each first data signal.
Further, the display further includes a plurality of cascaded GOA units, each GOA unit is electrically connected with the pixel unit array, wherein the adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated includes: according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated; and adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the adjusted first clock signals input by the GOA units.
Further, according to the current charging time of each pixel unit to be compensated, the corresponding first scanning signal and the first data signal are adjusted to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, and the method further includes: adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated; and obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted phase of each first scanning signal and/or the adjusted phase of each first data signal.
Further, adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated includes: according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated; and adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the adjusted first clock signals input by the GOA units.
Further, the display further includes a timing controller electrically connected to each of the GOA units, and configured to adjust a first clock signal input by a GOA unit corresponding to each of the pixel units to be compensated according to a current charging time of each of the pixel units to be compensated, including: the duty ratio of a second clock signal input by the time schedule controller is adjusted in advance; and adjusting the first clock signals input by the GOA units corresponding to the pixel units to be compensated according to the adjusted duty ratio of the second clock signals input by the time schedule controller.
Further, a thin film transistor is disposed in each pixel unit, and drives each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, including: turning on a thin film transistor in the corresponding pixel unit to be compensated according to the second scanning signal corresponding to each pixel unit to be compensated; and after the thin film transistor in the corresponding pixel unit to be compensated is turned on, writing the second data signal into the corresponding pixel unit to be compensated.
According to another aspect of the present application, there is provided a charge compensation device applied to a display including a pixel cell array including a plurality of pixel cells arranged in a row-column form, the charge compensation device being electrically connected with the pixel cell array, the charge compensation device comprising: the detection module is used for detecting a first scanning signal and a first data signal which are currently corresponding to at least one pixel unit to be compensated in the pixel unit array; the charging time determining module is electrically connected with the detecting module and is used for determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal; the adjustment module is electrically connected with the charging time determination module and is used for adjusting the corresponding first scanning signals and the first data signals according to the current charging time of each pixel unit to be compensated to obtain second scanning signals and second data signals corresponding to each pixel unit to be compensated; the driving module is electrically connected with the adjusting module and is used for driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
The method comprises the steps of firstly detecting a first scanning signal and a first data signal corresponding to at least one pixel unit to be compensated currently, then determining the current charging time of each pixel unit to be compensated, then adjusting according to the current charging time to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, finally driving each pixel unit to be compensated by using the second scanning signal and the second data signal, and according to aspects of the method, the phenomenon of variation of the scanning signal of each pixel unit to be compensated caused by the performance change of a thin film transistor can be compensated, the risk of insufficient charging of each pixel unit to be compensated is reduced, the phenomenon of uneven display is further improved, and the taste of a display is ensured.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a gate pulse variation in the related art.
Fig. 2 shows a flowchart of a charge compensation method according to an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating a driving timing of a display according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction relationship between the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials. In some instances, methods, means, elements, and circuits have not been described in detail as not to unnecessarily obscure the present application.
Fig. 1 shows a schematic diagram of a gate pulse variation in the related art.
As shown in fig. 1, in the related art, a normal gate pulse 11 (or a scan pulse) may be one pulse in a row scan signal. The pulse may be high. The line scanning signal can turn on all the thin film transistors in a line of pixel units of the display so as to write corresponding data into the line of pixel units, and then light up each pixel unit to realize luminous display.
However, in the related art, since the liquid crystal display panel is operated for a long time, the performance of the driving transistor is deteriorated (i.e., deteriorated) and the characteristics (e.g., threshold voltage or mobility) of the driving transistor itself are changed, and thus the Gate Pulse (i.e., gate Pulse) outputted from the GOA unit is changed to the abnormal Pulse 12 in fig. 1.
In addition, since the drain electrode of the thin film transistor in each pixel unit is electrically connected to the corresponding data line, and the source electrode of the thin film transistor in each pixel unit is electrically connected to the corresponding storage capacitor and the corresponding liquid crystal capacitor, under the condition that the display panel is at a high refresh rate, the corresponding storage capacitor and the corresponding liquid crystal capacitor in each pixel unit may be insufficiently charged, that is, each pixel unit may have a risk of insufficient charging, which further results in a phenomenon of uneven display, and affects the display quality.
In view of this, the present application generally provides a charge compensation method applied to a display including a pixel cell array including a plurality of pixel cells arranged in rows and columns, the charge compensation method including: detecting a first scanning signal and a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array; determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal; according to the current charging time of each pixel unit to be compensated, corresponding first scanning signals and first data signals are adjusted, and second scanning signals and second data signals corresponding to each pixel unit to be compensated are obtained; and driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
The method and the device can compensate the variation of the scanning signals of each pixel unit to be compensated due to the performance change of the thin film transistor, reduce the risk of insufficient charging of each pixel unit to be compensated, further improve the display non-uniformity and ensure the taste of the display.
Fig. 2 shows a flowchart of a charge compensation method according to an embodiment of the present application.
As shown in fig. 2, the charge compensation method according to the embodiment of the present application may include:
step S1: detecting a first scanning signal and a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array;
the pixel unit array according to the embodiment of the application may include a plurality of pixel units arranged in rows and columns. A thin film transistor may be provided in each pixel. Taking the display as a liquid crystal display for example, the grid electrode of the thin film transistor in each pixel unit can be electrically connected with a corresponding scanning line and is used for receiving a corresponding scanning signal; the drain electrode of the thin film transistor in each pixel unit can be electrically connected with the data line corresponding to the pixel unit; the source electrode of the thin film transistor in each pixel unit can be electrically connected with one end of the storage capacitor and one end of the liquid crystal capacitor in the pixel unit, and the other end of the storage capacitor and the other end of the liquid crystal capacitor can be electrically connected with the pixel electrode in the corresponding pixel unit. It is to be understood that the present application is not limited to a particular architecture of the display.
It is noted that for other types of display panels, such as OLED-based display panels, corresponding modifications can be made on the inventive concepts of the present application to conform to different application scenarios. It will be appreciated that the present application is not limited to the type of display.
Specifically, the first scan signal and the first data signal may be scan signals and data signals corresponding to at least one pixel unit to be compensated in actual operation. The scanning signals in the embodiments of the present application may be line scanning signals, so that the pixel unit array may adopt a progressive scanning manner. It should be noted that the pixel unit to be compensated may be one or more, and the pixel unit to be compensated may be predetermined according to needs.
Further, detecting a first scan signal and a first data signal currently corresponding to at least one pixel to be compensated in the pixel unit array includes:
step S11: detecting the falling edge of a first scanning signal corresponding to at least one pixel unit to be compensated in the pixel unit array;
step S12: detecting the rising edge of a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array.
In different application scenarios, a rising edge of a first scan signal currently corresponding to at least one pixel unit to be compensated in the pixel unit array may be detected, or a falling edge of a first data signal currently corresponding to at least one pixel unit to be compensated in the pixel unit array may be detected.
Step S2: determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal;
specifically, the current charging time of each pixel unit to be compensated may be a time length between a falling edge of the first scanning signal currently corresponding to each pixel unit to be compensated and a rising edge of the first data signal currently corresponding to the pixel unit to be compensated.
Further, determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal includes:
step S21: determining the current charging time of each pixel unit to be compensated according to the falling edge of the first scanning signal corresponding to each pixel unit to be compensated in the at least one pixel unit to be compensated and the rising edge of the first data signal corresponding to the pixel unit to be compensated.
Fig. 3 is a schematic diagram illustrating a driving timing of a display according to an embodiment of the present application.
As shown in fig. 3, gn may be a first scanning signal corresponding to an nth row of pixel units, and Dn may be a first data signal corresponding to any one of the pixel units to be compensated. The time length between the rising edge t1 of the first scanning signal Gn and the falling edge t3 of the first scanning signal Gn is the pulse width of the first scanning signal; the time length between the rising edge t2 of the first data signal Dn and the falling edge t4 of the second data signal Dn is the pulse width of the second data signal; the time length between the falling edge t3 of the first scan signal and the rising edge t2 of the corresponding first data signal Dn is the current charging time corresponding to the pixel unit to be compensated.
Step S3: according to the current charging time of each pixel unit to be compensated, corresponding first scanning signals and first data signals are adjusted, and second scanning signals and second data signals corresponding to each pixel unit to be compensated are obtained;
for example, the target charging time corresponding to each pixel unit to be compensated may be preset. And adjusting the corresponding first scanning signals and the first data signals according to the difference value between the current charging time of each pixel unit to be compensated and the target charging time corresponding to the pixel unit to be compensated, so as to obtain the corresponding second scanning signals and the second data signals of each pixel unit to be compensated.
Further, according to the current charging time of each pixel unit to be compensated, adjusting the corresponding first scanning signal and the first data signal to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, including:
step S31: adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated;
step S32: and obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted duty ratio of each first scanning signal and/or the adjusted duty ratio of each first data signal.
Wherein, the first scan signal and the first data signal may be periodic signals. The duty ratio of the first scanning signal may be a ratio of a pulse width corresponding to each pixel unit to be compensated to a duty cycle of the first scanning signal. Similarly, the duty cycle of the first data signal may be a ratio of the pulse width corresponding to each pixel unit to be compensated to the duty cycle of the first data signal.
Further, the display further comprises a plurality of GOA units in cascade, and each GOA unit is electrically connected with the pixel unit array. For example, for an nth stage GOA unit, N is an arbitrary positive integer, a corresponding control signal (e.g., ST signal), clock signal, and power signal may be input to the nth stage GOA unit, and the nth stage GOA unit may output an nth stage scanning signal Gn according to the input corresponding control signal, clock signal, and power signal to scan the nth row of pixel units. It is to be understood that the present application is not limited to the specific structure of the GOA unit.
Further, adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated, including:
step S311: according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated;
step S312: and adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the adjusted first clock signals input by the GOA units.
Further, the first clock signal input by the GOA unit may include 8 clock signals. For example, in fig. 3, CK1-CK8 are 8 clock signals, LC1 may be a first control signal, LC2 may be a second control signal, ST may be a third control signal, VSSG may be a first supply voltage, and VSSQ may be a second supply voltage. The 8 clock signals, the first control signal, the second control signal, the third control signal, the first power supply voltage and the second power supply voltage may be input into the corresponding GOA units, so that the corresponding GOA units output the scan signals.
Further, according to the current charging time of each pixel unit to be compensated, the corresponding first scanning signal and the first data signal are adjusted to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, and the method further includes:
step S33: adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated;
step S34: and obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted phase of each first scanning signal and/or the adjusted phase of each first data signal.
The phase of the first scan signal may be a time point of output of the first scan signal, which indicates a sequence of generation of the first scan signal. The phase of the first data signal may be a point in time when the first data signal is output, indicating the order in which the first data signal is generated. For example, in fig. 3, the phase of the first scanning signal Gn may be characterized with reference to time t1 or time t 3.
Further, adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated includes:
step S331: according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated;
step S332: and adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the adjusted first clock signals input by the GOA units.
In the embodiment of the present application, the adjustment of the phase may be performed by referring to the adjustment of the duty cycle. The adjustment phase and the adjustment duty ratio may be performed simultaneously, or may be performed by selecting one of the two types of adjustment, which is not limited in this application.
By adjusting the duty ratio of the scanning signal and/or the data signal corresponding to the pixel unit to be compensated, or adjusting the phase of the scanning signal and/or the data signal corresponding to the pixel unit to be compensated, the embodiment of the application can solve the problem of display function degradation caused by the characteristic change of the thin film transistor, and compensates the charging loss caused by the drift of the thin film transistor Guan Texing.
Further, the display also includes a timing controller (i.e., TCON) electrically connected to each of the GOA units.
Further, adjusting the first clock signal input by the GOA unit corresponding to each pixel unit to be compensated according to the current charging time of each pixel unit to be compensated, including:
step S301: the duty ratio of a second clock signal input by the time schedule controller is adjusted in advance;
step S302: and adjusting the first clock signals input by the GOA units corresponding to the pixel units to be compensated according to the adjusted duty ratio of the second clock signals input by the time schedule controller.
Illustratively, the second clock signal may include CLK1 and CLK2. The timing controller may receive the input CLK1 and CLK2, adjust the duty ratio of the input CLK1 and the duty ratio of the input CLK2, and output 8 clock signals CK1-CK8. Since the duty ratio of the 8 clock signals CK1-CK8 is also adjustable, the scan signals output by the GOA units after the corresponding GOA units are input by the 8 clock signals CK1-CK8 can also be adjusted as needed.
Step S4: and driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
Further, a thin film transistor is disposed in each pixel unit, and drives each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, including:
step S41: turning on a thin film transistor in the corresponding pixel unit to be compensated according to the second scanning signal corresponding to each pixel unit to be compensated;
step S42: and after the thin film transistor in the corresponding pixel unit to be compensated is turned on, writing the second data signal into the corresponding pixel unit to be compensated.
Further, referring to fig. 3, t5-t6 are blanking periods (or blank times). Thus, the detection process of the embodiments of the present application occurs during non-blanking periods (i.e., display periods). In fig. 3, after time t6, the display phase may be restarted, i.e. the display phase and the blanking phase may be alternated.
Further, in addition to the thin film transistor, other types of transistors may be used for the pixel unit. It is to be understood that the present application is not limited as to the type of transistor.
It should be noted that, the embodiments of the present application may also use the charging loss to compensate. The charge loss of the pixel unit to be compensated in the embodiment of the application can be theoretically determined by the difference between the data voltage and the voltage already charged into the pixel unit. However, the voltage measurement in the pixel unit is very difficult, so that the brightness corresponding to the display can be compared with the reference brightness, the charging loss of the pixel unit to be compensated can be obtained, and the degree of compensation is measured according to the charging loss. It is understood that the present application is not limited as to how the charge loss is calculated.
In addition, the present application also provides a charge compensation device applied to a display including a pixel cell array including a plurality of pixel cells arranged in a row-column form, the charge compensation device being electrically connected with the pixel cell array, the charge compensation device including: the detection module is used for detecting a first scanning signal and a first data signal which are currently corresponding to at least one pixel unit to be compensated in the pixel unit array; the charging time determining module is electrically connected with the detecting module and is used for determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal; the adjustment module is electrically connected with the charging time determination module and is used for adjusting the corresponding first scanning signals and the first data signals according to the current charging time of each pixel unit to be compensated to obtain second scanning signals and second data signals corresponding to each pixel unit to be compensated; the driving module is electrically connected with the adjusting module and is used for driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
Further, the detection module includes: the first detection module is used for detecting the falling edge of a first scanning signal corresponding to at least one pixel unit to be compensated in the pixel unit array; the second detection module is used for detecting the rising edge of the first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array.
Further, the charging time determining module includes: and the charging time determining submodule is used for determining the current charging time of each pixel unit to be compensated according to the falling edge of the first scanning signal corresponding to each pixel unit to be compensated in the at least one pixel unit to be compensated and the rising edge of the first data signal corresponding to the pixel unit to be compensated.
Further, the adjustment module includes: the duty ratio adjustment module is used for adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated; and the first adjustment sub-module is used for obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted duty ratio of each first scanning signal and/or the duty ratio of the first data signal.
Further, the display further includes a plurality of cascaded GOA units, each GOA unit is electrically connected with the pixel unit array, wherein the duty cycle adjustment module includes: the first clock adjustment module is used for adjusting first clock signals input by GOA units corresponding to the pixel units to be compensated according to the current charging time of the pixel units to be compensated; and the second adjusting sub-module is used for adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the adjusted first clock signals input by the GOA units.
Further, the adjustment module further includes: the phase adjustment module is used for adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated; and the third adjustment sub-module is used for obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted phases of the first scanning signals and/or the first data signals.
Further, the phase adjustment module includes: the first clock adjustment module is used for adjusting first clock signals input by GOA units corresponding to the pixel units to be compensated according to the current charging time of the pixel units to be compensated; and the fourth adjustment sub-module is used for adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the adjusted first clock signals input by the GOA units.
Further, the display further includes a timing controller electrically connected to each of the GOA units, and the first clock adjustment module includes: the second clock adjustment module is used for adjusting the duty ratio of a second clock signal input by the time sequence controller in advance; and the fifth adjusting sub-module is used for adjusting the first clock signals input by the GOA units corresponding to the pixel units to be compensated according to the adjusted duty ratio of the second clock signals input by the time sequence controller.
Further, a thin film transistor is disposed in each pixel unit, and the driving module includes: the scanning module is used for turning on the thin film transistors in the corresponding pixel units to be compensated according to the second scanning signals corresponding to the pixel units to be compensated; and the data writing module is used for writing the second data signal into the corresponding pixel unit to be compensated after the thin film transistor in the corresponding pixel unit to be compensated is turned on.
In summary, in the embodiment of the present application, the first scan signal and the first data signal corresponding to at least one pixel unit to be compensated are detected at first, then the current charging time of each pixel unit to be compensated is determined, and then the second scan signal and the second data signal corresponding to each pixel unit to be compensated are obtained by adjusting according to the current charging time, and finally each pixel unit to be compensated is driven by using the second scan signal and the second data signal, so that the phenomenon of variation of the scan signal generated by the performance change of the thin film transistor of each pixel unit to be compensated can be compensated, the risk of insufficient charging of each pixel unit to be compensated is reduced, the phenomenon of uneven display is further improved, and the taste of the display is ensured.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing describes the charging compensation method and the charging compensation device provided in the embodiments of the present application in detail, and specific examples are applied to illustrate the principles and the embodiments of the present application, where the foregoing description of the embodiments is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (7)

1. A charge compensation method applied to a display including a pixel cell array including a plurality of pixel cells arranged in rows and columns, the charge compensation method comprising:
detecting a first scan signal and a first data signal currently corresponding to at least one pixel to be compensated in the pixel unit array, including: detecting the falling edge of a first scanning signal corresponding to at least one pixel unit to be compensated in the pixel unit array; detecting the rising edge of a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array;
determining the current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal, including: determining the current charging time of each pixel unit to be compensated according to the falling edge of a first scanning signal corresponding to each pixel unit to be compensated in the at least one pixel unit to be compensated and the rising edge of a first data signal corresponding to the pixel unit to be compensated;
according to the current charging time of each pixel unit to be compensated, the corresponding first scanning signal and the first data signal are adjusted to obtain the corresponding second scanning signal and the corresponding second data signal of each pixel unit to be compensated, including: adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated; obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted duty ratio of each first scanning signal and/or the adjusted duty ratio of each first data signal;
and driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
2. The charge compensation method of claim 1, wherein the display further comprises a plurality of GOA cells in a cascade, each GOA cell being electrically connected to the array of pixel cells, wherein adjusting the duty cycle of the corresponding first scan signal and/or the duty cycle of the first data signal according to the current charge time of each pixel cell to be compensated comprises:
according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated;
and adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the adjusted first clock signals input by the GOA units.
3. The charge compensation method according to claim 2, wherein the step of adjusting the corresponding first scan signal and first data signal according to the current charge time of each pixel unit to be compensated to obtain the corresponding second scan signal and second data signal of each pixel unit to be compensated, further comprises:
adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charging time of each pixel unit to be compensated;
and obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted phase of each first scanning signal and/or the adjusted phase of each first data signal.
4. A charge compensation method according to claim 3, wherein adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the current charge time of each pixel cell to be compensated comprises:
according to the current charging time of each pixel unit to be compensated, adjusting a first clock signal input by a GOA unit corresponding to each pixel unit to be compensated;
and adjusting the phase of the corresponding first scanning signal and/or the phase of the first data signal according to the adjusted first clock signals input by the GOA units.
5. The charge compensation method of claim 4, wherein the display further comprises a timing controller electrically connected to each of the GOA units, the adjusting the first clock signal input by the GOA unit corresponding to each of the pixel units to be compensated according to the current charging time of each of the pixel units to be compensated, comprising:
the duty ratio of a second clock signal input by the time schedule controller is adjusted in advance;
and adjusting the first clock signals input by the GOA units corresponding to the pixel units to be compensated according to the adjusted duty ratio of the second clock signals input by the time schedule controller.
6. The charge compensation method according to claim 1, wherein a thin film transistor is provided in each of the pixel units, and each of the pixel units to be compensated is driven according to a second scanning signal and a second data signal corresponding to each of the pixel units to be compensated, comprising:
turning on a thin film transistor in the corresponding pixel unit to be compensated according to the second scanning signal corresponding to each pixel unit to be compensated;
and after the thin film transistor in the corresponding pixel unit to be compensated is turned on, writing the second data signal into the corresponding pixel unit to be compensated.
7. A charge compensation device for use in a display, the display comprising an array of pixel cells including a plurality of pixel cells arranged in rows and columns, the charge compensation device being electrically connected to the array of pixel cells, the charge compensation device comprising:
the detection module is configured to detect a first scan signal and a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array, and includes: detecting the falling edge of a first scanning signal corresponding to at least one pixel unit to be compensated in the pixel unit array; detecting the rising edge of a first data signal corresponding to at least one pixel unit to be compensated in the pixel unit array;
the charging time determining module is electrically connected with the detecting module, and is configured to determine a current charging time of each pixel unit to be compensated according to each first scanning signal and each first data signal, and includes: determining the current charging time of each pixel unit to be compensated according to the falling edge of a first scanning signal corresponding to each pixel unit to be compensated in the at least one pixel unit to be compensated and the rising edge of a first data signal corresponding to the pixel unit to be compensated;
the adjustment module, electrically connected to the charging time determining module, is configured to adjust the corresponding first scanning signal and first data signal according to the current charging time of each pixel unit to be compensated, to obtain a second scanning signal and a second data signal corresponding to each pixel unit to be compensated, where the adjustment module includes: adjusting the duty ratio of the corresponding first scanning signal and/or the duty ratio of the first data signal according to the current charging time of each pixel unit to be compensated; obtaining a second scanning signal and a second data signal corresponding to each pixel unit to be compensated according to the adjusted duty ratio of each first scanning signal and/or the adjusted duty ratio of each first data signal;
the driving module is electrically connected with the adjusting module and is used for driving each pixel unit to be compensated according to a second scanning signal and a second data signal corresponding to each pixel unit to be compensated.
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