CN114740648A - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN114740648A CN114740648A CN202210316426.2A CN202210316426A CN114740648A CN 114740648 A CN114740648 A CN 114740648A CN 202210316426 A CN202210316426 A CN 202210316426A CN 114740648 A CN114740648 A CN 114740648A
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- 238000001514 detection method Methods 0.000 claims abstract description 73
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 20
- 239000010408 film Substances 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 claims description 16
- 239000010409 thin film Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000000059 patterning Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000006066 Comins reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
Abstract
The present application relates to a display panel, a driving method thereof, and a display device, the display panel including: an array substrate; the color film substrate is arranged opposite to the array substrate and comprises a color film common electrode layer, and the color film common electrode layer comprises at least one region to be detected; the liquid crystal layer is arranged between the color film substrate and the array substrate; and the detection unit is used for detecting the corresponding public voltage of the area to be detected, so that when the display panel displays, the pixel voltages of different areas in the display panel can be correspondingly compensated based on the detected public voltages of different areas in the display panel, the difference of actual display effects of the same pixel voltage at different positions due to the deviation of the public voltages at different positions in the display panel is avoided, and the display uniformity of the display panel is improved.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.
[ background of the invention ]
Liquid Crystal Display panels (Liquid Crystal Display panels) have the characteristics of low power consumption, mature process technology, no radiation and the like, and have already occupied the leading position in the field of flat Panel Display.
In the liquid crystal display panel, a pixel voltage is applied to a pixel electrode, and a common voltage is applied to a common electrode corresponding to the pixel electrode to deflect liquid crystal molecules positioned therebetween, thereby realizing screen display.
However, the deviation of the common voltage at different positions in the display panel may cause different actual display effects of the same pixel voltage at different positions, which may cause a problem of display non-uniformity of the display panel during displaying.
[ summary of the invention ]
The embodiment of the application provides a display panel, a driving method thereof and a display device, so as to improve the display uniformity of the display panel.
In order to solve the above problem, an embodiment of the present application provides a display panel, including: an array substrate; the color film substrate is arranged opposite to the array substrate and comprises a color film common electrode layer, and the color film common electrode layer comprises at least one region to be detected; the liquid crystal layer is arranged between the color film substrate and the array substrate; and the detection unit is arranged corresponding to the at least one region to be detected and is used for detecting the common voltage of the corresponding region to be detected.
The detection unit comprises a sensing electrode and a sensing line, the sensing electrode is electrically connected to the sensing line and forms a sensing capacitor with the corresponding color film common electrode layer in the area to be detected, and the detection unit detects the common voltage of the corresponding area to be detected through the sensing capacitor.
The array substrate comprises a plurality of pixel electrodes which are arranged opposite to the color film common electrode layer, and the pixel electrodes and the sensing electrodes are arranged on the same layer.
The detection unit further comprises a sensing switch element, the sensing switch element is connected with the sensing capacitor in series through a sensing line, and the sensing line is used for reading a voltage signal on the sensing electrode when the sensing switch element is conducted.
The number of the detection units is multiple, the detection units are arranged in multiple rows, and each detection unit in the same row of detection units shares the same sensing line.
The array substrate comprises a plurality of scanning lines arranged along the row direction, a plurality of data lines arranged along the column direction, and a plurality of sub-pixel units arranged in rows and columns and defined by the scanning lines and the data lines, wherein the sensing switch elements are thin film transistors, and the grid electrodes of the sensing switch elements contained in each detection unit in the same row of detection units are connected to the same scanning line.
Wherein, the display panel still includes: and the adjusting unit is electrically connected with the detection unit and comprises an analog-to-digital converter and a controller electrically connected with the analog-to-digital converter, wherein the analog-to-digital converter is used for performing analog-to-digital conversion on the public voltage detected by the detection unit to obtain a digital signal and generating the obtained data signal to the controller, and the controller is used for comparing the digital signal with a preset public voltage value to obtain a comparison result and adjusting the data voltage output by a data driver in the display panel according to the comparison result.
In order to solve the above problem, an embodiment of the present application further provides a driving method of a display panel, which is applied to any one of the above display panels, including: the drive detection unit detects the common voltage of the corresponding region to be detected.
The driving method of the display panel further comprises the following steps: carrying out analog-to-digital conversion on the common voltage detected by the detection unit to obtain a digital signal; comparing the digital signal with a preset public voltage value to obtain a comparison result; and adjusting the data voltage output by the data driver in the display panel according to the comparison result.
In order to solve the above problem, an embodiment of the present application further provides a display device including the display panel of any one of the above.
The beneficial effect of this application is: different from the prior art, according to the display panel, the driving method thereof and the display device provided by the application, the detection unit is used for detecting the common voltage on the color film common electrode layer in the corresponding region to be detected, so that when the display panel displays, the pixel voltages in different regions in the display panel can be correspondingly compensated based on the detected common voltages in different regions in the display panel, the difference of actual display effects of the same pixel voltage in different positions due to the deviation of the common voltages in different positions in the display panel is avoided, and the display uniformity of the display panel is improved.
[ description of the 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 description of the embodiments are briefly introduced 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 based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application;
fig. 2 is a schematic top-view structure diagram of a color film common electrode layer provided in the embodiment of the present application;
FIG. 3 is a schematic top view of a sensing electrode and a sensing line provided in an embodiment of the present application;
fig. 4 is a schematic view of a detecting unit detecting a common voltage of a corresponding region to be detected according to an embodiment of the present application;
FIG. 5 is a circuit diagram of a display panel according to an embodiment of the present disclosure;
FIG. 6 is a schematic circuit diagram of a display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
[ detailed description ] embodiments
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
Referring to fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present disclosure. As shown in fig. 1, the display panel includes a color filter substrate 10 and an array substrate 20 that are disposed opposite to each other, a liquid crystal layer 30 disposed between the color filter substrate 10 and the array substrate 20, and at least one detection unit 40.
The color film substrate 10 includes a color film common electrode layer 11, and as shown in fig. 2, the color film common electrode layer 11 includes at least one region 111 to be detected. The at least one detecting unit 40 is disposed corresponding to the at least one to-be-detected region 111, and the detecting unit 40 is configured to detect a common voltage of the to-be-detected region 111 corresponding to the detecting unit 40. Specifically, each region 111 to be detected may have an independent detecting unit 40 for detecting the common voltage thereon, that is, the number of the detecting units 40 and the number of the regions 111 to be detected may be equal, for example, a plurality of the detecting units and the regions 111 to be detected.
In the display panel, a common voltage is applied to an input end (for example, a side end) of the color filter common electrode layer 11, and then the common voltage is transmitted from the input end of the color filter common electrode layer 11 to another position of the color filter common electrode layer 11. However, due to the ohmic voltage drop on the color film common electrode layer 11, the common voltages at the positions of the color film common electrode layer 11 near and far from the input end are not consistent, and if the common voltages are not processed, the actual display effects of the same pixel voltage in the display panel at different positions are different, so that the display uniformity of the display panel is affected.
Moreover, it can be understood that, in the embodiment, the color film common electrode layer 11 is divided into at least one to-be-detected region 111, and one detection unit 40 is correspondingly arranged for each to-be-detected region 111 to detect the common voltage of the to-be-detected region 111, so that the common voltages of different to-be-detected regions in the color film common electrode layer 11 can be obtained, and further, the pixel voltages of different regions in the display panel can be correspondingly compensated according to the detected common voltages of different regions in the display panel, so as to avoid that the actual display effects of the same pixel voltage at different positions are different due to the deviation of the common voltages at different positions in the display panel, and thus, the display uniformity of the display panel can be improved.
Specifically, when the color film common electrode layer 11 is divided into the regions 111 to be detected, the number of the regions 111 to be detected and the area of each region 111 to be detected may be set according to the size of the display panel and the common voltage detection effect, which is not limited in the present application. In addition, it is understood that the color filter common electrode layer 11 refers to a common electrode on the color filter substrate 10 side of the display panel, and a cathode can be provided to a sub-pixel unit in the display panel. Specifically, the color film common electrode layer 11 may be a whole film layer, and may be made of a transparent conductive material such as indium tin oxide.
In an embodiment, as shown in fig. 1, fig. 3 and fig. 4, the detection unit 40 may include a sensing electrode 41A and a sensing line 41B (or referred to as a Sense line), where the sensing electrode 41A is electrically connected to the sensing line 41B, and forms a sensing capacitance Csense with the color filter common electrode layer 11 in the to-be-detected region 111 corresponding thereto. In addition, the detection unit 40 may specifically detect the common voltage V on the color film common electrode layer 11 in the corresponding to-be-detected region 111 through the sensing capacitor Csense included in the detection unitCF Com。
Specifically, two electrode plates of the sensing capacitor Csense (that is, the sensing electrode 41A and the color film common electrode layer 11 in the to-be-detected region 111 corresponding to the sensing electrode 41A) are insulated from each other and are arranged at an interval, and voltages of the two are related, for example, equal, so that the voltage of the sensing electrode 41A is obtained through detection, and the common voltage V of the to-be-detected region 111 corresponding to the sensing electrode 41A can be determined to be obtainedCF Com。
Specifically, the sensing electrode 41A may be made of the same material as the sensing line 41B, for example, a transparent conductive material. In some embodiments, as shown in fig. 3, the sensing electrode 41A and the sensing line 41B may be connected to form an integrated structure, and the sensing electrode 41A may correspond to a portion of the integrated structure that is opposite to the color filter common electrode layer 11, and the sensing line 41B may correspond to a portion of the integrated structure that is not opposite to the color filter common electrode layer 11.
In one embodiment, the sensing electrode 41A and the sensing line 41B may be disposed in the same layer and may be formed by the same patterning process.
In some embodiments, as shown in fig. 1, the array substrate 20 may include a plurality of pixel electrodes 21 disposed opposite to the color filter common electrode layer 11, and the plurality of pixel electrodes 21 and the color filter common electrode layer 11 may respectively provide an anode and a cathode for the sub-pixel units in the display panel.
In addition, in order to save the process steps, the sensing electrode 41A and/or the sensing line 41B may be disposed on the same layer as the pixel electrode 21 in the array substrate 20 and formed by the same patterning process.
In some embodiments, as shown in fig. 1, the color filter layer 12 may be further included in the color filter substrate 10, and the color filter layer 12 may be disposed on a side of the color filter common electrode layer 11 facing the array substrate 20, or on a side of the color filter common electrode layer 11 facing away from the array substrate 20. Specifically, the color filter layer 12 may include a black matrix and a plurality of color filters, wherein the black matrix is provided with a plurality of hollow areas, and the plurality of color filters may be respectively located in the plurality of hollow areas and disposed corresponding to the plurality of pixel electrodes 21.
It can be understood that, in the display panel provided in the embodiment of the present application, it may be defined that, in the vertical direction, one pixel electrode 21 and one color filter that are correspondingly arranged, a portion of the liquid crystal layer 30 that is located therebetween, and a portion of the color filter common electrode layer 11 that is located at a position corresponding to the portion of the liquid crystal layer form a sub-pixel unit. When a display panel displays and a certain sub-pixel unit needs to be lit, a pixel voltage (or a data voltage) is applied to the pixel electrode 21 in the sub-pixel unit, and a common voltage VCF Com is applied to a part of the color film common electrode layer 11 in the sub-pixel unit, so that liquid crystal molecules in a part of the liquid crystal layer 30 in the sub-pixel unit can be deflected under the combined action of the pixel voltage and the common voltage VCF Com, and light emitted by a backlight module in the display panel can be emitted through a color filter in the sub-pixel unit, so that display is realized.
In some alternative embodiments, the sensing electrode 41A and the sensing line 41B may also be the same conductive structure, that is, the conductive structure can be both the sensing electrode 41A and the sensing line 41B in the detection unit 40, so that the material cost can be saved.
In some specific embodiments, as shown in fig. 3 and fig. 4, the detecting unit 40 may further include a sensing switch element 42 (or referred to as Tsense), wherein the sensing switch element 42 is connected in series with the sensing capacitor Csense through a sensing line 41B, and the sensing line 41B can be used for reading a voltage signal on the sensing electrode 41A when the sensing switch element 42 is turned on.
In some embodiments, as shown in fig. 5, the number of the detecting units 40 may be multiple, and the detecting units 40 may be arranged in multiple columns, multiple rows, or rows and columns.
In the embodiment where the plurality of detection units 40 are arranged in multiple columns, as shown in fig. 5, each detection unit 40 in the same column of detection units may correspond to an independent sensing line. In other embodiments, as shown in fig. 6, the detecting units 40 in the same row of detecting units may also share the same sensing line, so as to reduce the process difficulty of the sensing line.
In the above embodiment, as shown in fig. 5 and 6, the array substrate 20 may include a plurality of Scan lines arranged along a row direction, a plurality of Data lines arranged along a column direction, and a plurality of sub-pixel units pixels arranged in rows and columns defined by the Scan lines and the Data lines.
The sub-pixel unit pixel may include a pixel thin film transistor T1, a storage capacitor Cst, and a liquid crystal capacitor CLC. And is provided withWhen the display panel displays and needs to light a sub-pixel unit, the control terminal (i.e., the gate) of the pixel tft T1 in the sub-pixel unit receives the Scan signal transmitted by the Scan line, and then the pixel tft T1 is turned on under the control of the Scan signal, so that the input terminal of the pixel tft T1 can receive the Data signal transmitted by the Data line, and the Data signal can be transmitted from the output terminal of the pixel tft T1 to the first electrode of the storage capacitor Cst, and the second electrode of the storage capacitor Cst is grounded (or connected to the array common voltage VArray Com). Then, the liquid crystal capacitance CLCThe first electrode coupled to the storage capacitor Cst according to the data signal drives the liquid crystal capacitor CLCThe liquid crystal molecules between the two plates are polarized for display.
Specifically, in the embodiment where the plurality of detection units 40 are arranged in multiple columns or in rows and columns, a column of detection units and a column of sub-pixel units may be disposed between every two adjacent data lines, that is, each column of sub-pixel units may correspond to a column of detection units, so that the common voltage detection precision of the detection unit 40 can reach the precision of each column of sub-pixel units. Moreover, in some alternative embodiments, at least one column of sub-pixel units may be disposed between every two adjacent columns of detection units, that is, every two adjacent columns of sub-pixel units correspond to one column of detection units, for example, as shown in fig. 5, every three adjacent columns of sub-pixel units correspond to one column of detection units, so that when every three adjacent columns of sub-pixel units form one column of pixel units, that is, one pixel unit is formed by three sub-pixel units, the common voltage detection precision of the detection unit 40 can reach the precision of each column of pixel units.
Specifically, in the embodiment where the plurality of detecting units 40 are arranged in multiple rows or in rows and columns, as shown in fig. 5, a row of detecting units and a row of sub-pixel units may be disposed between every two adjacent Scan lines, that is, each row of sub-pixel units corresponds to one row of detecting units, so that the common voltage detecting precision of the detecting units 40 can reach the precision of each row of sub-pixel units. Moreover, in some alternative embodiments, at least one row of sub-pixel units may be disposed between every two adjacent rows of detection units, that is, every two adjacent rows of sub-pixel units correspond to one row of detection units.
In the above embodiment, the plurality of sub-pixel units pixel may include a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, specifically, each row of sub-pixel units may include a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit that are periodically arranged in a row direction, and each sub-pixel unit pixel in the same column of sub-pixel units may be the same sub-pixel unit pixel, for example, all of the sub-pixel units.
In the embodiment where the detection unit 40 includes the sensing switching element 42/Tsense, the sensing switching element 42/Tsense may be a thin film transistor including a gate, a source, and a drain. Specifically, one of the source and the drain of the sensing switching element 42/Tsense may serve as an input terminal of the sensing switching element 42/Tsense, and the other may serve as an output terminal of the sensing switching element 42/Tsense. An input terminal of the sensing switching element 42/Tsense may be electrically connected to the sensing electrode 41A, and an output terminal of the sensing switching element 42/Tsense may be electrically connected to the sensing line 41B/Sense line.
In one embodiment, as shown in fig. 5 and 6, the gates of the sensing switch elements Tsense included in the detecting units 40 in the same row may be electrically connected to the same Scan line Scan, so as to detect the common voltage V of the region to be detected 111CF ComIn this case, by controlling the gate driver in the display panel to supply the on signal to the Scan line, the on signal can be transmitted to the gate of the sensing switch element Tsense included in each of the detection units 40 in one row of the detection units electrically connected to the Scan line through the Scan line, so that the sensing switch element Tsense included in each of the detection units 40 in the row of the detection units is turned on, and further, the on signal can be transmitted to the gate of the sensing switch element Tsense included in each of the detection units 40 in the one row of the detection units through the Scan lineSo that the voltage signal on the sensing electrode 41A included in each detection unit 40 in the row of detection units can be transmitted to the output end of the sensing switch element Tsense via the input end of the sensing switch element Tsense, and thus the sensing line electrically connected to the output end of the sensing switch element Tsense can output the common voltage V of the corresponding region to be detected 111CF Com. That is, the common voltage V of each region to be detected 111 in a line of regions to be detected corresponding to a line of detecting units, which can be detected by inputting a conducting signal to one Scan lineCF Com。
Specifically, the turn-on signal may be a voltage signal, and a voltage value corresponding to the voltage signal may be greater than a threshold voltage of the sensing switch element Tsense.
Specifically, in the embodiment where the plurality of detecting units 40 are arranged in multiple rows or in rows and columns, the detecting units 40 may be driven row by row to detect the common voltage V of the corresponding to-be-detected region 111 by inputting a conducting signal to the Scan line connected to each detecting unit row by rowCF Com。
In an embodiment, the display and the common voltage detection of the display panel may be separated in time. Specifically, when the display panel displays, scanning signals are supplied to the scanning lines Scan line and pixel voltages are supplied to the Data lines Data line row by row, so that liquid crystal molecules are deflected, thereby realizing normal display of the display panel. In addition, when detecting the common voltage, a conducting signal is input to the Scan line connected to each row of the detection units line by line, so that the voltage signal on the sensing electrode 41A in the detection unit 40 can be transmitted to the output end of the conducting sensing light-emitting element Tsense through the conducting sensing light-emitting element Tsense, thereby realizing the common voltage V of different regions to be detected 111 in the color film common electrode layer 11CF ComDetection of (3).
In the embodiment, as shown in fig. 1, 5 and 6, the array substrate 20 may further include a thin film transistor layer 22, and the thin film transistor layer 22 may be used to provide two plates of the Pixel thin film transistor T1, the Scan line, the Data line and the storage capacitor Cst of the sub Pixel unit Pixel in the display panel. In addition, in order to save the process steps, the gate of the sensing switch element 41B/Tsense may be disposed on the same layer as the gate of the pixel thin film transistor T1 and formed through the same patterning process, and the source and the drain of the sensing switch element 41B/Tsense may be disposed on the same layer as the source and the drain of the pixel thin film transistor T1 and formed through the same patterning process.
In the above embodiment, as shown in fig. 4, the display panel may further include an adjusting unit electrically connected to the detecting unit 40, and the adjusting unit may include an analog-to-digital converter ADC (e.g., a 16-bit analog-to-digital converter), and a controller (not shown in the figure) electrically connected to the analog-to-digital converter ADC. Specifically, the analog-to-digital converter ADC may be electrically connected to an output terminal of the sensing switching element 41B/Tsense to read the voltage signal on the sensing electrode 41A from the output terminal of the sensing switching element 41B/Tsense.
Specifically, the analog-to-digital converter ADC may be used for detecting the common voltage V obtained by the detection unit 40CF ComAnd performing analog-to-digital conversion to obtain a digital signal Raw Data, and sending the obtained Data signal Raw Data to the controller. The controller can be used for comparing the digital signal Raw Data with a preset common voltage value to obtain a comparison result, and adjusting the Data voltage (or called as pixel voltage) output by the Data driver in the display panel according to the comparison result to correspondingly compensate the pixel voltage of different areas in the display panel, thereby avoiding the common voltage V at different positions in the display panelCF ComThe display uniformity is affected by the difference of the actual display effect of the same pixel voltage at different positions due to the deviation.
According to the display panel, the detection unit is used for detecting the common voltage on the color film common electrode layer in the corresponding region to be detected, so that when the display panel displays, the pixel voltages in different regions in the display panel can be correspondingly compensated based on the detected common voltages in different regions in the display panel, and the difference of actual display effects of the same pixel voltage in different positions due to the deviation of the common voltages in different positions in the display panel is avoided, and the display uniformity of the display panel is improved.
Referring to fig. 7, fig. 7 is a schematic flowchart illustrating a driving method of a display panel according to an embodiment of the present disclosure. The driving method of the display panel is applied to the display panel of any one of the embodiments, wherein the display panel comprises an array substrate and a color film substrate which are arranged oppositely, a liquid crystal layer arranged between the color film substrate and the array substrate, and at least one detection unit. The color film substrate comprises a color film common electrode layer, and the color film common electrode layer comprises at least one region to be detected. The at least one detection unit is arranged corresponding to the at least one to-be-detected area, and each detection unit is used for detecting the common voltage of the corresponding to-be-detected area. Moreover, the description of the display panel has been described in detail in the above embodiments, and thus is not repeated herein. Specifically, as shown in fig. 7, a specific flow of the driving method of the display panel may be as follows:
s71: the drive detection unit detects the common voltage of the corresponding region to be detected.
In some embodiments, as shown in fig. 7, the method for driving a display panel may further include:
s72: and carrying out analog-to-digital conversion on the common voltage detected by the detection unit to obtain a digital signal.
The digital signal may specifically be a value corresponding to a common voltage of each to-be-detected region detected by the detection unit.
S73: and comparing the digital signal with a preset public voltage value to obtain a comparison result.
Specifically, the comparison result may specifically include a difference between a common voltage of each to-be-detected region and a preset common voltage value. For example, a difference value between the common voltage of the first to-be-detected region and the preset common voltage value is a first difference value, a difference value between the common voltage of the second to-be-detected region and the preset common voltage value is a second difference value, and so on.
S74: and adjusting the data voltage output by the data driver in the display panel according to the comparison result.
Specifically, for each region to be detected, the data voltages (or called pixel voltages) corresponding to all the pixel electrodes in the display panel, which are arranged opposite to the region to be detected, may be adjusted from the current value to the sum of the current value and the difference value corresponding to the region to be detected, for example, the data voltages corresponding to all the pixel electrodes in the display panel, which are arranged opposite to the first region to be detected, are adjusted from the current value V1 to the sum (V1+ D1) of the current value V1 and the first difference value D1, so that when the display panel displays, it can be ensured that the liquid crystal deflection electric fields provided by the voltage differences between the color film common electrode layer and the pixel electrodes at different positions in the display panel meet the expectation, so as to ensure the display uniformity of the display panel.
In the driving method of the display panel in this embodiment, the driving detection unit detects the corresponding common voltage of the region to be detected, so that when the display panel displays, the pixel voltages of different regions in the display panel can be correspondingly compensated based on the detected common voltages of different regions in the display panel, thereby avoiding that the actual display effects of the same pixel voltage at different positions are different due to the deviation of the common voltages at different positions in the display panel, and further improving the display uniformity of the display panel.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The display device 80 includes the display panel 81 of any of the above embodiments.
Specifically, the display panel 81 includes an array substrate and a color filter substrate that are disposed opposite to each other, a liquid crystal layer disposed between the color filter substrate and the array substrate, and at least one detection unit. The color film substrate comprises a color film common electrode layer, and the color film common electrode layer comprises at least one region to be detected. The at least one detection unit is arranged corresponding to the at least one area to be detected, and each detection unit is used for detecting the public voltage of the corresponding area to be detected.
According to the display device, the detection unit is used for detecting the common voltage on the color film common electrode layer in the corresponding region to be detected, so that when the display panel displays, the pixel voltages in different regions in the display panel can be correspondingly compensated based on the detected common voltages in different regions in the display panel, and the difference of actual display effects of the same pixel voltage in different positions due to the deviation of the common voltages in different positions in the display panel is avoided, and the display uniformity of the display panel is improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A display panel, comprising:
an array substrate;
the color film substrate is arranged opposite to the array substrate and comprises a color film common electrode layer, and the color film common electrode layer comprises at least one region to be detected;
the liquid crystal layer is arranged between the color film substrate and the array substrate; and the number of the first and second groups,
and the detection unit is arranged corresponding to the at least one region to be detected and is used for detecting the public voltage of the corresponding region to be detected.
2. The display panel according to claim 1, wherein the detection unit includes a sensing electrode and a sensing line, the sensing electrode is electrically connected to the sensing line and forms a sensing capacitor with the corresponding color film common electrode layer in the region to be detected, and the detection unit detects the common voltage of the corresponding region to be detected through the sensing capacitor.
3. The display panel according to claim 2, wherein the array substrate includes a plurality of pixel electrodes disposed opposite to the color film common electrode layer, and the sensing electrode and the pixel electrodes are disposed on the same layer.
4. The display panel according to claim 2, wherein the detection unit further comprises a sensing switch element, the sensing switch element and the sensing capacitor are connected in series through the sensing line, and the sensing line is configured to read a voltage signal on the sensing electrode when the sensing switch element is turned on.
5. The display panel according to claim 4, wherein the number of the detecting units is plural, the detecting units are arranged in plural columns, and each detecting unit in the same column of detecting units shares the same sensing line.
6. The display panel according to claim 4, wherein the number of the detecting units is plural, the detecting units are arranged in a plurality of rows, the array substrate comprises a plurality of scan lines arranged along a row direction, a plurality of data lines arranged along a column direction, and a plurality of sub-pixel units defined by the scan lines and the data lines and arranged in rows and columns,
and the sensing switch element is a thin film transistor, and the grid electrode of the sensing switch element contained in each detection unit in the same row of detection units is connected to the same scanning line.
7. The display panel according to claim 1, characterized in that the display panel further comprises:
the adjusting unit is electrically connected with the detecting unit and comprises an analog-to-digital converter and a controller electrically connected with the analog-to-digital converter, wherein the analog-to-digital converter is used for performing analog-to-digital conversion on the public voltage detected by the detecting unit to obtain a digital signal and generating the obtained data signal to the controller, and the controller is used for comparing the digital signal with a preset public voltage value to obtain a comparison result and adjusting the data voltage output by a data driver in the display panel according to the comparison result.
8. A driving method of a display panel, applied to the display panel according to any one of claims 1 to 7, the driving method of the display panel comprising:
and driving the detection unit to detect the common voltage of the corresponding to-be-detected region.
9. The method for driving a display panel according to claim 8, further comprising:
performing analog-to-digital conversion on the common voltage detected by the detection unit to obtain a digital signal;
comparing the digital signal with a preset public voltage value to obtain a comparison result;
and adjusting the data voltage output by a data driver in the display panel according to the comparison result.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
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