CN115240608A - Display panel, display driving method and display touch device - Google Patents

Display panel, display driving method and display touch device Download PDF

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CN115240608A
CN115240608A CN202210814952.1A CN202210814952A CN115240608A CN 115240608 A CN115240608 A CN 115240608A CN 202210814952 A CN202210814952 A CN 202210814952A CN 115240608 A CN115240608 A CN 115240608A
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display data
noise reduction
display
display panel
electrode
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CN115240608B (en
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史世明
薄赜文
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BOE Technology Group Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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]
    • G09G3/3225—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] using an active matrix
    • G09G3/3258—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] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Position Input By Displaying (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The disclosure provides a display panel, a display driving method and a display touch device. The display panel includes: the display device comprises a plurality of pixel structures, a plurality of display data signal lines and at least one noise reduction compensation electrode, wherein the display data signal lines are used for writing display data voltages into the pixel structures, the pixel structures share a common electrode, the noise reduction compensation electrode is coupled with the common electrode to form a capacitor, and the noise reduction compensation electrode is used for inhibiting the fluctuation of the voltage on the common electrode caused by the display data signal lines; and when the mean values of the display data voltages on the plurality of display data signal lines jump, the voltage values on the noise reduction compensation electrodes jump to the opposite direction. The voltage fluctuation of the common electrode in the display panel is restrained, so that the interference of the common electrode on the touch electrode can be reduced.

Description

Display panel, display driving method and display touch device
Technical Field
The disclosure belongs to the technical field of display and touch control, and particularly relates to a display panel, a display driving method and a display touch control device.
Background
This section is intended to provide a background or context to the embodiments recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The display panel is, for example, a liquid crystal display panel, a light emitting diode display panel, or the like. The light emitting diode display panel is, for example, an Organic Light Emitting Diode (OLED) display panel, a Micro light emitting diode (Micro-LED) display panel, a Mini light emitting diode (Mini-LED) display panel, or the like.
Touch electrodes are also commonly integrated in the display panel or an external touch panel is attached to the display panel. It is desirable to reduce interference of the display panel with the touch electrode or the touch panel.
Disclosure of Invention
The disclosure provides a display panel, a display driving method and a display touch device.
The technical scheme adopted by the disclosure is as follows: a display panel, comprising: the display device comprises a plurality of pixel structures, a plurality of display data signal lines and at least one noise reduction compensation electrode, wherein the display data signal lines are used for writing display data voltages into the pixel structures, the pixel structures share a common electrode, the noise reduction compensation electrode is coupled with the common electrode to form a capacitor, and the noise reduction compensation electrode is used for inhibiting the fluctuation of the voltage on the common electrode caused by the display data signal lines;
wherein the noise reduction compensation electrode is configured to: when the average value of the display data voltages on the plurality of display data signal lines is stable and unchanged, the voltage value on the noise reduction compensation electrode is stable and unchanged, and when the average value of the display data voltages on the plurality of display data signal lines jumps, the voltage value on the noise reduction compensation electrode jumps to the opposite direction.
In some embodiments, the pixel structures are arranged in an array, and the steady state voltage value on the at least one noise reduction compensation electrode (22) satisfies the following formula:
Figure BDA0003740656280000021
wherein Comp (m) is the steady state voltage value on the at least one noise reduction compensation electrode (22) during the row period of writing the display data voltage to the m-th row of pixel structures, D m，n The display data voltage required to be written into the nth pixel structure of the mth row is k, which is a positive proportionality coefficient, C is a constant, and N is the number of columns of the pixel structure.
In some embodiments, the display panel further comprises a driving backplane, the pixel structures being disposed on the driving backplane, the display data signal lines being located in the driving backplane.
In some embodiments, the noise reduction compensation electrode is disposed in the driving backplate.
In some embodiments, the noise reduction compensation electrode is disposed at the same layer as the display data signal line.
In some embodiments, the noise reduction compensation electrodes are alternately spaced apart from the display data signal lines.
In some embodiments, the noise reduction compensation electrode is disposed on a side of the common electrode away from the driving back plate.
In some embodiments, the display panel further includes a plurality of encapsulation layers stacked to cover the light emitting elements, and the noise reduction compensation electrode is disposed between two adjacent encapsulation layers of the plurality of encapsulation layers.
In some embodiments, the display panel further comprises at least one encapsulation layer covering the light emitting elements, and the noise reduction compensation electrode is disposed on a side of the at least one encapsulation layer away from the driving backplane.
In some embodiments, the at least one noise reduction compensation electrode is in a grid or sheet shape, and the at least one noise reduction compensation electrode is integrally connected.
The technical scheme adopted by the disclosure is as follows: a display touch device, comprising: the aforementioned display panel, and includes: and the touch control electrode is integrated in the display panel or the touch control panel is hung outside the display panel.
The technical scheme adopted by the disclosure is as follows: a display driving method for driving the display panel, the method comprising:
providing display data voltages to the plurality of display data signal lines, respectively;
providing a compensation voltage signal to the at least one noise reduction compensation electrode;
when the average value of the display data voltages supplied to the plurality of display data signal lines is stable and unchanged, the voltage value of the compensation voltage signal is stable and unchanged, and when the average value of the display data voltages supplied to the plurality of display data signal lines is jumped, the voltage value of the compensation voltage signal is jumped in the opposite direction to suppress the fluctuation of the voltage on the common electrode caused by the display data signal lines.
In some embodiments, the pixel structures are arranged in an array, and the voltage value on the at least one noise reduction compensation electrode (22) satisfies the following formula:
Figure BDA0003740656280000031
wherein Comp (m) is a voltage value of a compensation voltage signal provided to the at least one noise reduction compensation electrode (22) during a row period of writing the display data voltage to the m-th row of pixel structures, D m，n The display data voltage required to be written into the nth pixel structure of the mth row is k, which is a positive proportionality coefficient, C is a constant, and N is the number of columns of the pixel structure.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the disclosure.
Fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the disclosure.
Fig. 4 is a flowchart of a display driving method according to an embodiment of the present disclosure.
Fig. 5 is a waveform diagram of a display driving method according to an embodiment of the present disclosure.
Wherein the appendage is labeled: 1. a substrate; 2. a driving circuit layer; 21. a display data signal line; 22. a noise reduction compensation electrode; 31. a light emitting layer; 32. a common electrode; 33. a pixel electrode; 41. 42, 43, encapsulation layer; 44. a cover layer; 45. a buffer layer; 46. a planarization layer; 5. a pixel defining layer; 61. a touch buffer layer; 62. touch-control the insulating layer; 71. 72, touch control electrodes.
Detailed Description
The disclosure will be further described with reference to the embodiments shown in the drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure. Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the disclosure. Fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the disclosure. Referring to fig. 1 to 3, an embodiment of the present disclosure provides a display panel including: the display device comprises a plurality of pixel structures, a plurality of display data signal lines 21 and at least one noise reduction compensation electrode 22, wherein the display data signal lines 21 are used for writing display data voltages into the pixel structures, the plurality of pixel structures share one common electrode 32, the noise reduction compensation electrode 22 is coupled with the common electrode 32 to form a capacitor, and the noise reduction compensation electrode 22 is used for suppressing the fluctuation of the voltages on the common electrode 32 caused by the display data signal lines 21;
when the average value of the display data voltages on the plurality of display data signal lines 21 is stable and unchanged, the voltage value on the noise reduction compensation electrode 22 is stable and unchanged, and when the average value of the display data voltages on the plurality of display data signal lines 21 jumps, the voltage value on the noise reduction compensation electrode 22 jumps in the opposite direction.
In some embodiments, the display panel is a liquid crystal display panel. Wherein a single pixel structure includes at least a pixel electrode 33, a common electrode 32, and a liquid crystal layer therebetween.
In some embodiments, the display panel is an organic light emitting diode display panel. Wherein a single pixel structure comprises at least a pixel electrode 33, a common electrode 32 and an organic light emitting layer 31 therebetween. In these embodiments, the common electrode 32 generally functions as a common cathode.
In other embodiments, the display panel is a micro-led display panel or a mini-led display panel. Wherein a single pixel structure comprises at least a pixel electrode 33, a common electrode 32 and a light emitting diode chip therebetween. In these embodiments, the common electrode 32 generally functions as a common cathode.
In yet other embodiments, the display panel is an electrowetting display panel. Wherein the single pixel structure comprises at least a pixel electrode 33, a common electrode 32, a polar liquid and a non-polar liquid between the pixel electrode 33 and the common electrode 32, and a hydrophobic layer covering the pixel electrode 33.
In these display panels, the voltage signal on each display data signal line 21 remains constant for most of each row period, and the data voltage on each display data signal line 21 may jump at the boundary of two consecutive row periods. Since a parasitic capacitance is inevitably generated between the display data signal line 21 and the common electrode 32, the frequent transition of the voltage signal on the display data signal line 21 easily causes the fluctuation of the voltage on the common electrode 32. When the touch electrode is integrated in the display panel or the touch panel is externally hung on the display panel, the fluctuation of the voltage on the common electrode 32 is easy to interfere with the touch electrode, and a larger noise signal is generated.
The trend of the voltage on the noise reduction compensation electrode 22 is opposite to the trend of the average voltage on the display data signal line 21.
For example, when the average voltage on the display data signal line 21 increases, the voltage on the noise reduction compensation electrode 22 appropriately decreases; when the average voltage on the display data signal line 21 decreases, the voltage on the noise reduction compensation electrode 22 is appropriately increased, thereby suppressing fluctuation of the voltage on the common electrode 32 due to fluctuation of the average voltage on the display data signal line 21.
The noise intensity on the common electrode 32 is reduced, so that the signal-to-noise ratio of a touch signal (no matter finger touch or capacitive active pen touch) can be improved, and the probability of point reporting jitter and false reporting is reduced. This enables the display panel to support various active pen protocols such as MPP, HPP, USI, etc., as well as finger touch functionality.
Specifically, the pixel structures are arranged in an array. The steady state voltage value on the at least one noise reduction compensation electrode (22) satisfies the following formula:
Figure BDA0003740656280000051
wherein Comp (m) is the steady state voltage value on the at least one noise reduction compensation electrode (22) during the row period of writing the display data voltage to the m-th row of pixel structures, D m，n The display data voltage required to be written into the nth pixel structure of the mth row is k, which is a positive proportionality coefficient, C is a constant, and N is the number of columns of the pixel structure.
In some embodiments, referring to fig. 1 to 3, the display panel further includes a driving backplane, the pixel structures are disposed on the driving backplane, and the display data signal lines 21 are located in the driving backplane.
Specifically, in the embodiment shown in fig. 1 to 3, the pixel structure includes a light emitting element. The light emitting element is an organic light emitting diode including a common electrode 32, a pixel electrode 33, and a light emitting layer 31 therebetween. The pixel defining layer 5 defines a spatial area of the light emitting layer 31. In some embodiments, the material of the pixel definition layer 5 includes: a transparent resin material that can be exposed and developed.
In some embodiments, referring to fig. 1, noise reduction compensation electrodes 22 are disposed in the driving back plate. The driving backplane comprises a substrate 1 and a driving circuit layer 2.
In some embodiments, the substrate 1 is a glass substrate 1 or a flexible substrate 1. The material of the flexible substrate 1 is, for example, polyimide (PI).
A plurality of layers of wirings (display data signal lines 21, gate lines, etc.) and pixel circuits are provided in the driving circuit layer 2, and each pixel circuit drives one pixel electrode 33. The present disclosure does not limit the design of the driving circuit.
In some embodiments, referring to fig. 1, the noise reduction compensation electrode 22 is disposed at the same layer as the display data signal line 21. Of course, the noise reduction compensation electrodes 22 may be disposed on other wiring layers of the driving back plate.
In the present disclosure, the two structures are disposed in the same layer, which means that they are formed by using one material layer, and the distance between them and the substrate 1 is not limited to be equal.
Specifically, referring to fig. 1, the noise reduction compensation electrodes 22 are alternately disposed at intervals with the display data signal lines 21.
In some embodiments, referring to fig. 2 and 3, the noise reduction compensation electrode 22 is disposed on a side of the common electrode 32 away from the driving back plate.
In some embodiments, referring to fig. 2, the display panel further includes a plurality of encapsulation layers 41, 42, 43 disposed in a stack, the plurality of encapsulation layers 41, 42, 43 covering the light emitting elements, and the noise reduction compensation electrode 22 is disposed between two adjacent encapsulation layers of the plurality of encapsulation layers 41, 42, 43, for example, between the encapsulation layers 41, 42, and between the encapsulation layers 42, 43.
Specifically, in the embodiment shown in fig. 2, the encapsulation layer 41 is an inorganic encapsulation layer, and the material thereof includes silicon oxynitride or silicon nitride. The noise reduction compensation electrode 22 is disposed on the encapsulation layer 41. The cover layer 44 covers the noise reduction compensation electrode 22. The material of the cap layer 44 is, for example, silicon nitride or silicon oxide. The encapsulation layer 42 overlies the cover layer 44. The encapsulation layer 42 is an organic encapsulation layer, and the material thereof includes acrylic transparent organic material. The encapsulation layer 43 covers the encapsulation layer 42. The encapsulation layer 42 is an inorganic encapsulation layer, and the material thereof includes silicon oxynitride or silicon nitride.
In the embodiment shown in fig. 2, the display panel further includes touch electrodes integrated therein. Specifically, the touch buffer layer 61 is disposed on the encapsulation layer 43. The touch electrodes 71 and 72 are double-layer wiring, and the two layers of touch electrodes 71 and 72 are separated by the touch insulating layer 62. The planarization layer 46 covers the touch electrode 72. The material of the touch insulating layer 62 is, for example, a silicon nitride material or an exposure-developable transparent resin material. The touch buffer layer 45 is made of, for example, a silicon nitride material or an exposed and developed transparent resin material. The material of the planarization layer 46 is, for example, a silicon nitride material or a transparent resin material that can be developed by exposure. The touch electrodes 71 and 72 are made of, for example, molybdenum (Mo), titanium (Ti), copper (Cu), or the like.
In some embodiments, referring to fig. 3, the display panel further includes at least one encapsulation layer 41, 42, 43 covering the light emitting elements, and the noise reduction compensation electrode 22 is disposed on a side of the at least one encapsulation layer 41, 42, 43 away from the driving backplane.
Specifically, in the embodiment shown in fig. 3, a buffer layer 45 is disposed on the encapsulation layer 43. The material of the buffer layer 45 is, for example: silicon nitride or an exposure developable transparent resin. The noise reduction compensation electrode 22 is disposed on the buffer layer 45, and the noise reduction compensation electrode 22 is covered by the planarization layer 46.
In some embodiments, the at least one noise reduction compensation electrode 22 is in a grid or sheet shape, and the at least one noise reduction compensation electrode 22 is integrally connected.
In some embodiments, the noise reduction compensation electrode 22 is made of, for example: molybdenum (Mo), titanium (Ti), copper (Cu), and the like. In other embodiments, the noise reduction compensation electrode 22 is a titanium/aluminum/titanium multilayer metal structure. The noise reduction compensation electrode 22 may be patterned by photolithography, etching, or the like. Of course, the noise reduction compensation electrode 22 may be a transparent whole layer electrode. In these embodiments, the noise reduction compensation electrode 22 layer material is, for example, indium Tin Oxide (ITO) or the like.
Based on the same inventive concept, an embodiment of the present disclosure further provides a display touch device, including: the aforementioned display panel, and includes: a touch electrode integrated in the display panel or a touch panel externally hung on the display panel.
The display touch device is any product or component used for display and touch, such as a display touch panel, a display touch module, a mobile phone, a tablet computer, a navigator and the like.
The present disclosure does not limit the display type and the touch type of the display touch device. The display type is, for example, a liquid crystal display, a light emitting diode display, an electrowetting display, or the like. The touch type is, for example, mutual capacitance, self-capacitance, etc.
Based on the same inventive concept, embodiments of the present disclosure also provide a display driving method for driving the foregoing display panel, with reference to fig. 4, the method including:
step 101, providing display data voltages to a plurality of display data signal lines 21 respectively;
102, providing a compensation voltage signal to at least one noise reduction compensation electrode 22;
when the average value of the display data voltages supplied to the plurality of display data signal lines 21 is stable and constant, the voltage value of the compensation voltage signal is stable and constant, and when the average value of the display data voltages supplied to the plurality of display data signal lines 21 jumps, the voltage value of the compensation voltage signal jumps in the opposite direction to suppress the fluctuation of the voltage on the common electrode 32 caused by the display data signal lines 21.
In the case where the average value of the display data voltages supplied from the plurality of display data signal lines 21 jumps, the trend of the average voltage on the display data signal lines 21 is opposite to the trend of the voltage on the noise reduction compensation electrode 22, thereby helping to keep the voltage on the common electrode 32 stable.
Referring to fig. 5, assume that a display panel includes a pixel structure of M rows and N columns. Each pixel structure constitutes a single color sub-pixel. The display data signal lines 21 sequentially supply display data voltages required by the pixel structures in the same row. The display data signal line 21 is numbered D1, D2 and D3 \8230, dn in sequence.
Average voltage value U of display data signals written on m-th row of pixel structures data (m) is:
Figure BDA0003740656280000071
this value remains constant for most of the duration of a line period, and jumps occur in most cases at the intersection of two line periods.
At the same time, the value of the compensation voltage signal is synchronously changed to Comp (m)
Figure BDA0003740656280000072
Wherein D is m，n For the n image of the m lineThe display data voltage to be written into the pixel structure, k is a positive proportionality coefficient, and C is a constant.
The embodiments in the present disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on differences from other embodiments.
The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the present disclosure. It is intended that the present disclosure also cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (12)

1. A display panel, comprising: a plurality of pixel structures, a plurality of display data signal lines (21) and at least one noise reduction compensation electrode (22), wherein the display data signal lines (21) are used for writing display data voltages into the pixel structures, the plurality of pixel structures share a common electrode (32), the noise reduction compensation electrode (22) is coupled with the common electrode (32) to form a capacitor, and the noise reduction compensation electrode (22) is used for inhibiting the fluctuation of the voltage on the common electrode (32) caused by the display data signal lines (21);
wherein the noise reduction compensation electrode is configured to: when the average value of the display data voltages on the display data signal lines (21) is stable and unchanged, the voltage value on the noise reduction compensation electrode (22) is stable and unchanged, and when the average value of the display data voltages on the display data signal lines (21) jumps, the voltage value on the noise reduction compensation electrode (22) jumps to the opposite direction.
2. The display panel according to claim 1, wherein the pixel structures are arranged in an array, and the steady-state voltage value on the at least one noise reduction compensation electrode (22) satisfies the following formula:
Figure FDA0003740656270000011
wherein Comp (m) is the steady state voltage value on the at least one noise reduction compensation electrode (22) during the row period of writing the display data voltage to the m-th row of pixel structures, D m，n The display data voltage required to be written into the nth pixel structure of the mth row is k, which is a positive proportionality coefficient, C is a constant, and N is the number of columns of the pixel structure.
3. The display panel according to claim 1, wherein the display panel further comprises a driving backplane, the pixel structures being arranged on the driving backplane, the display data signal lines (21) being located in the driving backplane.
4. The display panel according to claim 3, wherein the noise reduction compensation electrode (22) is provided in the driving backplane.
5. The display panel according to claim 4, wherein the noise reduction compensation electrode (22) is provided in the same layer as the display data signal line (21).
6. The display panel according to claim 3, wherein the noise reduction compensation electrode (22) is disposed on a side of the common electrode (32) away from the driving backplane.
7. The display panel according to claim 6, wherein the display panel further comprises a plurality of encapsulating layers (41, 42, 43) arranged one above another, the plurality of encapsulating layers (41, 42, 43) covering the light emitting elements, and the noise reduction compensation electrode (22) is arranged between adjacent two of the plurality of encapsulating layers (41, 42, 43).
8. The display panel according to claim 6, wherein the display panel further comprises at least one encapsulation layer (41, 42, 43) covering the light emitting elements, and the noise reduction compensation electrode (22) is disposed on a side of the at least one encapsulation layer away from the driving backplane.
9. The display panel according to claim 6, wherein the at least one noise reduction compensation electrode (22) is in a grid or sheet shape, and the at least one noise reduction compensation electrode (22) is integrally connected.
10. A display touch device, comprising: the display panel according to any one of claims 1 to 9, and comprising: and the touch control electrode is integrated in the display panel or the touch control panel is hung outside the display panel.
11. A display driving method for driving the display panel according to any one of claims 1 to 9, the method comprising:
supplying display data voltages to the plurality of display data signal lines (21), respectively;
providing a compensation voltage signal to the at least one noise reduction compensation electrode (22);
when the average value of the display data voltages supplied to the plurality of display data signal lines (21) is stable and unchanged, the voltage value of the compensation voltage signal is stable and unchanged, and when the average value of the display data voltages supplied to the plurality of display data signal lines (21) is jumped, the voltage value of the compensation voltage signal is jumped in the opposite direction so as to inhibit the fluctuation of the voltage on the common electrode (32) caused by the display data signal lines (21).
12. A method according to claim 11, wherein the pixel structures are arranged in an array and the compensation voltage signal provided to the at least one noise reduction compensation electrode (22) satisfies the following equation:
Figure FDA0003740656270000021
wherein, Comp (m) is a voltage value of a compensation voltage signal provided to the at least one noise reduction compensation electrode (22) during a line period of writing the display data voltage to the m-th row of pixel structures, D m，n The display data voltage required to be written into the nth pixel structure of the mth row is k, which is a positive proportionality coefficient, C is a constant, and N is the number of columns of the pixel structure.
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