CN113192456A - Crosstalk elimination method and device of display panel and display equipment - Google Patents
Crosstalk elimination method and device of display panel and display equipment Download PDFInfo
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- CN113192456A CN113192456A CN202110486222.9A CN202110486222A CN113192456A CN 113192456 A CN113192456 A CN 113192456A CN 202110486222 A CN202110486222 A CN 202110486222A CN 113192456 A CN113192456 A CN 113192456A
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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
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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Abstract
The application is applicable to the technical field of display, and provides a crosstalk elimination method and device for a display panel and display equipment. According to the embodiment of the application, the influence factor of the common voltage of the mth column of the nth row is obtained according to the source driving voltage of the mth column of the nth row and the source driving voltage of the mth column of the n-1 th row; determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs; acquiring a first compensation signal according to the ratio of the number of nth row influence factors belonging to a kth preset influence factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset influence factor range; compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal to eliminate the deviation of the common voltage of the nth row and the mth column, so as to eliminate the deviation of the pixel voltage, further eliminate the crosstalk phenomenon and improve the display effect of the display panel.
Description
Technical Field
The present application belongs to the field of display technologies, and in particular, to a crosstalk elimination method and apparatus for a display panel, and a display device.
Background
With the rapid development of display technologies, display panels are widely used in various fields such as entertainment, education, security and the like, and the requirements of users on the display effect of the display panels are gradually increased.
Because the source driving voltage in the display panel is switched between the positive source driving voltage and the negative source driving voltage when being output, parasitic capacitance is generated between the source driving voltage and the common voltage in the display panel, coupling influence is caused, the common voltage is changed, a crosstalk phenomenon is formed, and the display effect is poor.
Disclosure of Invention
In view of this, embodiments of the present application provide a crosstalk elimination method and apparatus for a display panel, and a display device, so as to solve the problem that a crosstalk phenomenon is formed and a display effect is poor due to a change of a common voltage caused by a coupling effect due to a parasitic capacitance generated between a source driving voltage and the common voltage in the display panel.
A first aspect of an embodiment of the present application provides a crosstalk cancellation method for a display panel, including:
acquiring an influence factor of the common voltage of the nth row and the mth column according to the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column;
determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs;
acquiring a first compensation signal according to the ratio of the number of nth row influence factors belonging to a kth preset influence factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset influence factor range;
compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal;
wherein N is 1,2, …, N, M is 1,2, …, M, K is 1,2, …, K, N is 2 or more, M is 1 or more, K is 1 or more, and N, M and K are integers.
A second aspect of the embodiments of the present application provides a crosstalk cancellation apparatus for a display panel, including:
the first obtaining module is used for obtaining an influence factor of the common voltage of the nth row and the mth column according to the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column;
the determining module is used for determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs;
the second obtaining module is used for obtaining a first compensation signal according to the ratio of the number of the nth row influence factors belonging to the kth preset influence factor range in the total column number and the kth preset compensation coefficient corresponding to the kth preset influence factor range;
the compensation module is used for compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal;
wherein N is 1,2, …, N, M is 1,2, …, M, K is 1,2, …, K, N is 2 or more, M is 1 or more, K is 1 or more, and N, M and K are integers.
A third aspect of the embodiments of the present application provides a display device, which includes a display panel, a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the crosstalk cancellation method provided in the first aspect of the embodiments of the present application when executing the computer program.
A first aspect of the embodiments of the present application provides a crosstalk elimination method for a display panel, where an influence factor of an mth column common voltage in an nth row is obtained according to an mth column source driving voltage in the nth row and a mth column source driving voltage in an n-1 th row; determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs; acquiring a first compensation signal according to the ratio of the number of nth row influence factors belonging to a kth preset influence factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset influence factor range; compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal to eliminate the deviation of the common voltage of the nth row and the mth column, so as to eliminate the deviation of the pixel voltage, further eliminate the crosstalk phenomenon and improve the display effect of the display panel.
It is understood that, the beneficial effects of the second aspect and the third aspect can be referred to the related description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a bright line crosstalk phenomenon and a dark line crosstalk phenomenon formed on a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a crosstalk cancellation method for a display panel according to an embodiment of the present application;
fig. 3 is a schematic flowchart of another crosstalk cancellation method for a display panel according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a crosstalk cancellation apparatus of a display panel according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The embodiment of the application provides a driving method of a display panel, which can be applied to display equipment, and can be specifically executed by a processor of the display equipment when a computer program with corresponding functions is run, so as to compensate public voltage accessed by the display panel, eliminate deviation of the public voltage, eliminate deviation of pixel voltage, further eliminate crosstalk phenomenon, and improve display effect of the display panel.
In application, the Display panel may be a Liquid Crystal Display panel based on a TFT-LCD (Thin Film Transistor Liquid Crystal Display) technology, a Liquid Crystal Display panel based on an LCD (Liquid Crystal Display) technology, an Organic Light-Emitting Display panel based on an OLED (Organic Light-Emitting Diode) technology, a Quantum Dot Light-Emitting Diode Display panel based on a QLED (Quantum Dot Light Emitting Diode) technology, a curved Display panel, or the like.
In application, the display device may be any type of device with a display function, such as a display, a television, a notebook computer, a tablet computer, a multimedia advertising machine, an electronic billboard, and the like.
In Application, the Processor may be a Timing Controller (TCON) or a Chip on Chip (SOC), or a Central Processing Unit (CPU), or may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA), or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In application, the source driving voltage of the mth column of the nth row is transmitted by the mth column data line, the common voltage of the mth column of the nth row is transmitted by the nth row common voltage line, the mth column data line and the nth row common voltage line are not connected with each other, but intersect at the pixel structure of the mth column of the nth row, where the intersection is also called Cross (Cross Over), and the intersection is prone to generate parasitic Capacitance (Stray Capacitance) due to the source driving voltage of the mth column of the nth row and the common voltage of the mth column of the nth row; for example, the source driving voltage of the positive electrode is inverted to the source driving voltage of the negative electrode in cooperation with the coupling effect of the parasitic capacitance, which easily causes the deviation of the common voltage of the mth column of the nth row and the deviation of the pixel voltage for driving the deflection of the pixels, and the deviation of the common voltage of one or more columns of the pixel structure of the nth row accumulates to cause the deviation of the common voltage of the nth row, thereby causing the crosstalk phenomenon of the display panel in the horizontal direction, and the display effect is poor, wherein the pixel voltage is equal to the source driving voltage minus the common voltage.
Fig. 1 exemplarily shows a schematic diagram of a bright line crosstalk phenomenon and a dark line crosstalk phenomenon formed on a display panel, wherein the brightness of crosstalk is determined by a deviation amount of a common voltage.
As shown in fig. 2, the crosstalk cancellation method for a display panel provided in the embodiment of the present application includes the following steps S201 and S202:
step S201, acquiring an influence factor of the common voltage of the mth row and the mth column of the nth row according to the source driving voltage of the mth column of the nth row and the source driving voltage of the mth column of the (n-1) th row; wherein N is 1,2, …, N, M is 1,2, …, M, N is not less than 2, M is not less than 1, and N and M are integers.
In application, the source driving voltage of the mth column in the nth row represents the source driving voltage of the thin film transistor of the pixel structure in the mth column in the nth row; the source driving voltage of the mth column in the (n-1) th row represents the source driving voltage of the thin film transistor of the mth column pixel structure in the (n-1) th row; the influence factor of the common voltage of the nth row and the mth column represents the deviation condition of the common voltage of the pixel structure of the nth row and the mth column relative to the preset common voltage of the pixel structure of the nth row, wherein the preset common voltage of the pixel structure of the nth row represents the common voltage which enables the pixel structure of the nth row to have the best display effect. The source driving voltage of the nth row and the mth column and the common voltage of the nth row and the mth column are used for driving the corresponding nth row and mth column pixel structures together, and the magnitude of the charge quantity of the nth row and mth column pixel structures can be controlled by controlling the magnitude of the source driving voltage of the nth row and mth column, so that the pixel deflection degree of the nth row and mth column pixel structures is controlled. The influence factor of the common voltage of the nth row and the mth column can be obtained by calculating the source driving voltage of the nth row and the mth column and the source driving voltage of the adjacent row of the nth-1 row and the mth column, and specifically can be obtained by calculating the source driving voltage of the nth row and the mth column and the source driving voltage of the nth-1 row and the mth column, so as to accurately reflect the deviation condition of the common voltage of the current pixel structure of the nth row and the mth column relative to the preset common voltage of the pixel structure of the nth row.
In one embodiment, the relationship of the influence factor of the nth row and mth column common voltage obtained in step S201 is:
ΔVdm_n＝Vdm_n-Vdm_n-1；
wherein, is Δ Vdm_nRepresenting the influence factor, V, of the common voltage in the n-th row and m-th columndm_nRepresents the source driving voltage, V, of the n-th row and m-th columndm_n-1Which represents the source driving voltage of the (n-1) th row and the (m) th column.
Step S202, determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs.
In application, according to the magnitude of the influence factor of the nth row and mth column of common voltage, the preset influence factor range to which the influence factor of the nth row and mth column of common voltage belongs is determined, and the influence factors of the nth row are distinguished by taking the magnitude as a standard.
Step S203, acquiring a first compensation signal according to the ratio of the number of the nth row influence factors belonging to the kth preset influence factor range in the total column number and the kth preset compensation coefficient corresponding to the kth preset influence factor range; wherein K is 1,2, …, K is more than or equal to 1 and K is an integer.
In application, the preset influence factor range may include K preset influence factor ranges, and specifically, the 1 st preset influence factor range is [ a [0,a1) The 2 nd predetermined influence factor range is [ a ]1,a2) By analogy, the K-1 Preset range of influence factor of [ aK-2,aK-1) The Kth predetermined influence factor range is [ a ]K-1,aK](ii) a The kth preset compensation coefficient may correspond to the kth preset influence factor one by one, and the kth preset compensation coefficient may be set according to a corresponding kth preset influence factor range; the ratio of the number of the nth row influence factors belonging to the kth preset influence factor range in the total column number represents the ratio of the number of the nth row source driving voltages corresponding to all the nth row influence factors belonging to the kth preset influence factor range in the total column number, so that the pixel voltage deviation conditions with different degrees in the current nth row pixel structure are reflected, and further the actual conditions of crosstalk are reflected.
In one embodiment, the relation of the first compensation signal obtained in step S203 is:
wherein Compensation1Representing a first compensation signal, a1Denotes the number of influence factors of the n-th row common voltage belonging to the 1 st preset influence factor range, x denotes the total column number,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the 1 st predetermined influence factor range in the total number of columns1Representing a 1 st predetermined compensation factor, a, corresponding to a 1 st predetermined range of influence factors2Representing the number of impact factors of the nth row common voltage belonging to the 2 nd preset impact factor range,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the 2 nd preset influence factor range in the total column number2Representing a 2 nd predetermined compensation factor, a, corresponding to the 2 nd predetermined range of influence factorsKRepresenting the number of impact factors of the nth row common voltage belonging to the kth preset impact factor range,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the K-th preset influence factor range in the total column numberKRepresenting a kth preset compensation factor corresponding to a kth preset impact factor range.
Step S204, compensating the common voltage of the nth row according to the first compensation signal; or, compensating the source driving voltage of the nth row and the mth column according to the first compensation signal.
In application, according to the first compensation signal, the common voltage of the nth row can be compensated, and the source driving voltage of the mth column of the nth row can also be compensated; after the compensation is carried out on the common voltage of the nth row or the source electrode driving voltage of the mth column of the nth row, the deviation of the pixel voltage can be eliminated, so that the crosstalk phenomenon is eliminated, and the display effect of the display panel is improved.
In one embodiment, the relationship for compensating the nth row common voltage according to the first compensation signal in step S204 is as follows:
V′stn＝Vstn-Compensation1；
wherein, V'stnRepresents the compensated n-th row common voltage, VstnRepresenting the nth row common voltage.
In one embodiment, step S204 includes:
and when the voltage difference value between the source driving voltage of the mth row and the source driving voltage of the mth column of the nth-1 row is smaller than a preset voltage threshold, compensating the source driving voltage of the mth column of the nth row according to the first compensation signal.
In application, when a voltage difference value between the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column is smaller than a preset voltage threshold, it indicates that the source driving voltage of the nth row and the mth column is easily affected by parasitic capacitance to generate a coupling effect and needs to be compensated; when the voltage difference value between the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column is greater than the preset voltage threshold value, the source driving voltage of the nth row and the mth column does not need to be compensated. The source driving voltage of the mth column of the nth row which needs to be compensated can be compensated by the first compensation signal.
In one embodiment, the source driving voltage for the nth row and the mth column in step S204 is compensated by the following relation:
V′dm_n＝Vdm_n+Compensation1；
wherein, V'dm_nRepresents the compensated source driving voltage, V, of the n-th row and m-th columndm_nShows the source driving voltage, Compensation, of the n-th row and m-th column1Representing the first compensation signal.
As shown in fig. 3, in an embodiment, based on the embodiment corresponding to fig. 2, after step S203, the following steps S301 and S302 are further included, and step S204 includes the following step S303:
step S301, when a voltage difference between the source driving voltage in the mth row and the source driving voltage in the mth column in the nth-1 row is smaller than a preset voltage threshold, determining a preset voltage range to which the source driving voltage in the mth column in the nth row belongs.
In application, when a voltage difference value between the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column is smaller than a preset voltage threshold, it indicates that the source driving voltage of the nth row and the mth column is easily affected by parasitic capacitance to generate a coupling effect, and a preset voltage range to which the source driving voltage of the nth row and the mth column belongs is determined, wherein the preset voltage threshold can be set according to actual needs.
Step S302, acquiring a second compensation signal according to the ratio of the number of the source driving voltages of the nth row belonging to the jth preset voltage range in the total column number and a jth preset compensation coefficient corresponding to the jth preset voltage range; wherein J is 1,2, …, J is not less than 1 and J is an integer.
In application, the preset voltage range may include J preset voltage ranges, specifically, the 1 st preset voltage range is [ V0,V1) The 2 nd predetermined voltage range is [ V ]1,V2) By analogy, the J-1 th preset voltage range is [ V ]J-2,VJ-1) The J-th predetermined voltage range is [ V ]J-1,VJ](ii) a The jth preset compensation coefficient may correspond to the jth preset voltage range one by one, and the jth preset compensation coefficient may be set according to the corresponding jth preset voltage range; when the occupation ratio of the number of the source driving voltages of the nth row belonging to the jth preset voltage range in the total column number exceeds a first preset proportion, increasing the jth preset compensation coefficient corresponding to the jth preset voltage range, reducing the preset compensation coefficients except for the jth preset compensation coefficient, or setting the preset compensation coefficients except for the jth preset compensation coefficient to be zero; and combining the occupation ratio of the number of the source driving voltages of the nth row belonging to the jth preset voltage range in the total column number, flexibly acquiring a second compensation signal according to the actual condition of crosstalk, better eliminating the crosstalk phenomenon during compensation and avoiding interference on a display area without crosstalk, and improving the display effect of the display panel, wherein the upper limit and the lower limit of the preset voltage range and the size of the jth preset compensation coefficient can be set according to actual requirements.
In one embodiment, step S302 includes:
and J is 255, and the J-th preset voltage range is one of 255 preset voltage ranges corresponding to the full gray scale level.
In application, when the display panel adopts 8-bit source driving signals, the gray scale level of the display panel is 255-level gray scale, the jth preset voltage range may correspond to 255 preset voltage ranges corresponding to the full gray scale level one by one, and specifically, the 255 preset voltage ranges corresponding to the full gray scale level are [ V'0,V′1)、[V′1,V′2)…[V′253,V′254)、[V′254,V′255]And then the 1 st preset voltage range is [ V'0,V′1) And the 2 nd preset voltage range is [ V'1,V′2) By analogy, the 254 th preset voltage range is [ V'252,V′254) And the 255 th preset voltage range is [ V'254,V′255]. Since the source driving voltage is easily affected by the parasitic capacitance to generate the coupling effect when the source driving voltage belongs to the preset voltage range with a lower gray scale level, when the jth preset voltage range corresponds to the 255 preset voltage ranges corresponding to the full gray scale level, the jth preset compensation coefficient corresponding to the jth preset voltage range corresponding to the preset voltage range with the lower gray scale level may be increased, for example, the magnitude of the 1 st preset compensation coefficient to the 255 th preset compensation coefficient may be set from large to small. The magnitude of the 1 st to 255 th preset compensation coefficients can be set according to actual needs, and the embodiment of the present application does not limit the scale used by the source driving signal and the gray scale level of the display panel.
In one embodiment, the relationship of the second compensation signal obtained in step S302 is:
wherein Compensation2Representing the second compensation signal, b1Denotes the number of source driving voltages of the nth row belonging to the 1 st preset voltage range, x denotes the total column number,
represents the ratio of the number of source driving voltages of the n-th row belonging to the 1 st preset voltage range in the total column number, beta1Represents a 1 st predetermined compensation coefficient corresponding to a 1 st predetermined voltage range, b2Indicating the number of source driving voltages of the nth row belonging to the 2 nd preset voltage range,
represents the ratio of the number of source driving voltages of the n-th row belonging to the 2 nd preset voltage range in the total column number, beta2Representing a 2 nd preset compensation coefficient corresponding to the 2 nd preset voltage range, bJIndicating the number of source driving voltages of the nth row belonging to the jth preset voltage range,
represents the ratio of the number of source driving voltages of the n-th row belonging to the J-th preset voltage range in the total column number, betaJIndicating a jth preset compensation factor corresponding to a jth preset voltage range.
And step S303, compensating the common voltage of the nth row according to the first compensation signal and the second compensation signal.
In application, the common voltage of the nth row is compensated according to the first compensation signal and the second compensation signal, the compensation amount of the common voltage of the nth row can be determined according to the ratio of the number of the nth row influence factors belonging to the k-th preset influence factor range in the total column number and the ratio of the number of the source driving voltages of the nth row belonging to the j-th preset voltage range in the total column number, and compared with the method of compensating the common voltage of the nth row by using the first compensation signal and the second compensation signal alone, the deviation of the common voltage of the mth column of the nth row is eliminated, so that the deviation of the pixel voltage is eliminated, the crosstalk phenomenon can be better eliminated, interference on a display area without crosstalk is avoided, and the display effect of the display panel is improved.
In one embodiment, the relation for compensating the nth row common voltage according to the first compensation signal and the second compensation signal in step S303 is as follows:
V′stn＝Vstn-Compensation1*Compensation2；
wherein, V'stnRepresents the compensated n-th row common voltage, VstnRepresents the n-th row common voltage, Compensation1Representing the first compensation signal.
According to the crosstalk elimination method provided by the embodiment of the application, the influence factor of the common voltage of the nth row and the mth column is obtained according to the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column; determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs; acquiring a first compensation signal according to the ratio of the number of nth row influence factors belonging to a kth preset influence factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset influence factor range; compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal to eliminate the deviation of the common voltage of the nth row and the mth column, so as to eliminate the deviation of the pixel voltage, further eliminate the crosstalk phenomenon and improve the display effect of the display panel.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
As shown in fig. 4, an embodiment of the present application further provides a crosstalk cancellation apparatus for a display panel, which is used to perform the steps in the crosstalk cancellation method embodiment of the display panel. The crosstalk cancellation means may be a virtual appliance (virtual application) in the display device, run by a processor of the display device, or may be the display device itself.
As shown in fig. 4, the crosstalk cancellation apparatus 4 of the display panel provided in the embodiment of the present application includes:
a first obtaining module 41, configured to obtain an influence factor of an nth common voltage in an nth row and an mth column according to a source driving voltage in the nth row and the mth column and a source driving voltage in an n-1 th row and the mth column;
a determining module 42, configured to determine a preset influence factor range to which an influence factor of the nth row and the mth column of common voltage belongs;
a second obtaining module 43, configured to obtain a first compensation signal according to a ratio of the number of nth row impact factors belonging to a kth preset impact factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset impact factor range;
the compensation module 44 is configured to compensate the nth row common voltage according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal;
wherein N is 1,2, …, N, M is 1,2, …, M, K is 1,2, …, K, N is 2 or more, M is 1 or more, K is 1 or more, and N, M and K are integers.
In one embodiment, the second obtaining module 43 further includes:
a preset voltage range determining module, configured to determine a preset voltage range to which the source driving voltage of the nth row and the mth column belongs when a voltage difference between the source driving voltage of the nth row and the mth column and the source driving voltage of the n-1 row and the mth column is smaller than a preset voltage threshold;
the second compensation signal obtaining module is used for obtaining a second compensation signal according to the occupation ratio of the number of the source electrode driving voltages of the nth row belonging to the jth preset voltage range in the total column number and the jth preset compensation coefficient corresponding to the jth preset voltage range.
In one embodiment, the compensation module 44 includes:
and the sub-compensation module is used for compensating the common voltage of the nth row according to the first compensation signal and the second compensation signal.
In application, each module in the crosstalk cancellation apparatus of the display panel may be a software program module, may also be implemented by different logic circuits integrated in a processor, and may also be implemented by a plurality of distributed processors.
As shown in fig. 5, an embodiment of the present application further provides a display device 5, which includes a memory 50, a processor 51, a computer program 52 stored in the memory 50 and executable on the processor 51, and a display panel 53, where the processor 51 implements the steps in the embodiments of the crosstalk cancellation method for each display panel when executing the computer program 52.
In an application, the display device may include, but is not limited to, a processor, a memory, a computer program stored in the memory that is executable on the processor, and a display panel. Those skilled in the art will appreciate that fig. 5 is merely an example of a display device and is not intended to limit the display device and may include more or less components than those shown, or some components may be combined, or different components may be included, such as input output devices, network access devices, etc.
In an application, the memory may be an internal storage unit of the display device in some embodiments, for example, a hard disk or a memory of the display device. The memory may also be an external storage device of the display device in other embodiments, such as a plug-in hard disk provided on the display device, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory may also include both an internal storage unit of the display device and an external storage device. The memory is used for storing an operating system, application programs, a bootloader (bootloader), data, and other programs, such as program codes of computer programs. The memory may also be used to temporarily store data that has been output or is to be output.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/modules, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and reference may be made to the part of the embodiment of the method specifically, and details are not described here.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the embodiments of the crosstalk cancellation method for a display panel may be implemented.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed display device and method may be implemented in other ways. For example, the above-described embodiments of the display device are merely illustrative, and for example, the division of the modules is only one logical division, and the actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A crosstalk cancellation method for a display panel, comprising:
acquiring an influence factor of the common voltage of the nth row and the mth column according to the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column;
determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs;
acquiring a first compensation signal according to the ratio of the number of nth row influence factors belonging to a kth preset influence factor range in the total column number and a kth preset compensation coefficient corresponding to the kth preset influence factor range;
compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal;
wherein N is 1,2, …, N, M is 1,2, …, M, K is 1,2, …, K, N is 2 or more, M is 1 or more, K is 1 or more, and N, M and K are integers.
2. The crosstalk elimination method for display panel according to claim 1, wherein after obtaining the first compensation signal according to the k-th preset compensation coefficient corresponding to the k-th preset influence factor range and the ratio of the number of n-th row influence factors belonging to the k-th preset influence factor range in the total column number, the method further comprises:
when the voltage difference value between the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column is smaller than a preset voltage threshold, determining a preset voltage range to which the source driving voltage of the nth row and the mth column belongs;
acquiring a second compensation signal according to the ratio of the number of the source driving voltages of the nth row belonging to the jth preset voltage range in the total column number and a jth preset compensation coefficient corresponding to the jth preset voltage range;
the compensating the common voltage of the nth row according to the first compensation signal includes:
compensating the common voltage of the nth row according to the first compensation signal and the second compensation signal;
wherein J is 1,2, …, J is not less than 1 and J is an integer.
3. The crosstalk elimination method for the display panel according to claim 2, wherein the relation formula for obtaining the second compensation signal according to the ratio of the number of the source driving voltages of the nth row belonging to the jth preset voltage range in the total column number and the jth preset compensation coefficient corresponding to the jth preset voltage range is as follows:
wherein Compensation2Representing said second compensation signal, b1Denotes the number of source driving voltages of the nth row belonging to the 1 st preset voltage range, x denotes the total column number,
represents the ratio of the number of source driving voltages of the n-th row belonging to the 1 st preset voltage range in the total column number, beta1Represents a 1 st predetermined compensation coefficient corresponding to a 1 st predetermined voltage range, b2Indicating the number of source driving voltages of the nth row belonging to the 2 nd preset voltage range,
represents the ratio of the number of source driving voltages of the n-th row belonging to the 2 nd preset voltage range in the total column number, beta2Representing a 2 nd preset compensation coefficient corresponding to the 2 nd preset voltage range, bJIndicating the number of source driving voltages of the nth row belonging to the jth preset voltage range,
represents the ratio of the number of source driving voltages of the n-th row belonging to the J-th preset voltage range in the total column number, betaIIndicating a jth preset compensation factor corresponding to a jth preset voltage range.
4. The crosstalk elimination method for display panel according to claim 2, wherein the relation for compensating the n-th row common voltage according to the first compensation signal and the second compensation signal is as follows:
V′stn＝Vstn-Compensation1*Compensation2；
wherein, V'stnRepresents the compensated n-th row common voltage, VstnRepresents the n-th row common voltage, Compensation1Represents said first Compensation signal, Compensation2Representing the second compensation signal.
5. The crosstalk elimination method for display panel according to claim 1, wherein the compensating the source driving voltage of the nth row and the mth column according to the first compensation signal comprises:
and when the voltage difference value between the source driving voltage of the mth row and the source driving voltage of the mth column of the nth-1 row is smaller than a preset voltage threshold, compensating the source driving voltage of the mth column of the nth row according to the first compensation signal.
6. The crosstalk elimination method for display panel according to claim 5, wherein when the voltage difference between the source driving voltage at the mth row and the mth column of the n-1 row is smaller than a preset voltage threshold, the source driving voltage at the mth row and the mth column of the n-1 row is compensated according to the first compensation signal by using the following relation:
V′dm_n＝Vdm_n+Compensation1；
wherein, V'dm_nRepresents the compensated source driving voltage, V, of the n-th row and m-th columndm_nShowing the source driving voltage, Compensation, of the n-th row and the m-th column1Representing the first compensation signal.
7. The crosstalk elimination method for the display panel according to claim 1, wherein the relationship of the influence factor of the common voltage at the nth row and the mth column obtained according to the source driving voltage at the nth row and the mth column and the source driving voltage at the n-1 th row and the mth column is:
ΔVdm_n＝Vdm_n-Vdm_n-1；
wherein, is Δ Vdm_nRepresenting the influence factor, V, of the common voltage of the n-th row and the m-th columndm_nRepresents the source driving voltage, V, of the n-th row and m-th columndm_n-1Representing the source driving voltage of the mth column of the (n-1) th row.
8. The crosstalk elimination method for display panel according to claim 1, wherein the relation formula for obtaining the first compensation signal according to the k-th preset compensation coefficient corresponding to the k-th preset influence factor range and the ratio of the number of influence factors of the n-th row common voltage belonging to the k-th preset influence factor range in the total column number is as follows:
wherein Compensation1Represents the first compensation signal, a1Representing the number of influence factors of the n-th row common voltage belonging to the 1 st preset influence factor range, x representing the total number of columns,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the 1 st predetermined influence factor range in the total number of columns1Representing a 1 st predetermined compensation factor, a, corresponding to a 1 st predetermined range of influence factors2Representing the number of impact factors of the nth row common voltage belonging to the 2 nd preset impact factor range,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the 2 nd preset influence factor range in the total column number2The representation corresponds to a 2 nd preset impact factor range2 nd preset compensation coefficient, aKRepresenting the number of impact factors of the nth row common voltage belonging to the kth preset impact factor range,
a ratio, η, of the number of influence factors representing the n-th row common voltage belonging to the K-th preset influence factor range in the total column numberKRepresenting a Kth preset compensation coefficient corresponding to the Kth preset influence factor range;
the relation formula for compensating the nth row common voltage according to the first compensation signal is as follows:
V′stn＝Vstn-Compensation1；
wherein, V'stnRepresents the compensated n-th row common voltage, VstnRepresenting the nth row common voltage.
9. A crosstalk cancellation apparatus for a display panel, comprising:
the first obtaining module is used for obtaining an influence factor of the common voltage of the nth row and the mth column according to the source driving voltage of the nth row and the mth column and the source driving voltage of the (n-1) th row and the mth column;
the determining module is used for determining a preset influence factor range to which an influence factor of the nth row and the mth column of the common voltage belongs;
the second obtaining module is used for obtaining a first compensation signal according to the ratio of the number of the nth row influence factors belonging to the kth preset influence factor range in the total column number and the kth preset compensation coefficient corresponding to the kth preset influence factor range;
the compensation module is used for compensating the common voltage of the nth row according to the first compensation signal; or compensating the source driving voltage of the nth row and the mth column according to the first compensation signal;
wherein N is 1,2, …, N, M is 1,2, …, M, K is 1,2, …, K, N is 2 or more, M is 1 or more, K is 1 or more, and N, M and K are integers.
10. A display device comprising a display panel, a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the crosstalk cancellation method of the display panel according to any one of claims 1 to 8 when executing the computer program.
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