CN109976013B - Display panel - Google Patents
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- CN109976013B CN109976013B CN201811433930.0A CN201811433930A CN109976013B CN 109976013 B CN109976013 B CN 109976013B CN 201811433930 A CN201811433930 A CN 201811433930A CN 109976013 B CN109976013 B CN 109976013B
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/13606—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit having means for reducing parasitic capacitance
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- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- Geometry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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- Position Input By Displaying (AREA)
Abstract
The invention discloses a display panel, belonging to the technical field of display, the display panel comprises: the touch control panel comprises touch control electrodes, scanning lines and data lines which are criss-cross, a plurality of pixel units defined by the intersection of the scanning lines and the data lines and a plurality of compensation signal line groups; the touch electrode is divided into a plurality of independent touch electrode blocks, the compensation signal line group is arranged corresponding to the disconnected position of the touch electrode, and voltage deviation caused by jump of a scanning signal on the touch electrode blocks is compensated through forming a parasitic capacitor between the compensation signal line group and the touch electrode, so that cross striations near the touch electrode junction are avoided.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel.
Technical Field
The structure of a conventional self-contained in-cell touch display panel is shown in fig. 1. The touch electrode 5 is divided into a plurality of independent touch electrode blocks, each touch electrode block corresponds to a plurality of pixel units, each touch electrode block is respectively connected with the touch signal transmission line 4 through the touch electrode connection hole 6, and the touch signal transmission line 4 is connected to the IC. When in the display stage, the touch signal transmission line 4 inputs a common electrode signal, the touch electrode 5 is used as a common electrode, and an electric field is formed between the touch electrode 5 and the pixel unit 8 to drive the liquid crystal display. When the touch control stage is in, the touch control signal transmission line 4 inputs a touch control induction signal, the touch control electrode 5 receives external electric field change, generates a detection signal and feeds the detection signal back to the IC through the touch control signal transmission line 4.
As shown in fig. 2, the touch electrode disconnection 104 is located between the first touch electrode area 102 and the second touch electrode area 103, and each of the first touch electrode area 102 and the second touch electrode area 103 includes a plurality of pixel units 101.
The touch electrode blocks of level 1 … …, level x-2, level x-1, level x +1, and level x +2 … … are sequentially arranged along the column direction. Taking the case of forward scanning of the display panel as an example, as shown in fig. 3, the x-1 st touch electrode signal Sx-1 represents the potential of the x-1 st touch electrode block, and the x-th touch electrode signal Sx represents the potential of the x-th touch electrode block. The n-1-th scanning signal Gn-1 is a scanning signal of a tail row of pixel units in the x-1-th touch electrode block, and Gn-2, Gn-3 and Gn-4 are scanning signals of pixel units in rows above the tail row of pixel units in sequence; the nth-stage scanning signal Gn is a scanning signal of a first-row pixel unit in the xth-stage touch electrode block, and Gn +1, Gn +2 and Gn +3 are scanning signals of pixel units in rows below the first-row pixel unit in sequence.
Parasitic capacitance with a non-negligible size exists between the scanning lines and the touch electrodes 5, voltage jump in the scanning lines can affect the electric potential of the touch electrodes 5 nearby, when the scanning lines are far away from the touch electrode disconnection part 104, the pull-up of the scanning lines to the electric potential of the touch electrodes 5 eliminates the pull-down of the current scanning lines to the electric potential of the touch electrodes 5, and the electric potential of the touch electrodes 5 is normal.
However, when the touch electrode is near the touch electrode disconnection 104, the scan line that can pull up the potential of the touch electrode 5 to cancel the pull-down of the current scan line to the potential of the touch electrode 5 is located in a non-local-level touch electrode, and cannot be offset, so that the potential of the touch electrode 5 is abnormal, and finally, the voltage difference in the liquid crystal cell near the touch electrode disconnection 104 is different from other areas, so that the cross striations near the touch electrode boundary are generated.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a display panel, in which a compensation signal line group corresponding to a disconnected portion of a touch electrode is disposed to improve or eliminate horizontal stripes near a touch electrode boundary.
The technical scheme provided by the invention is as follows:
the invention discloses a display panel, which comprises a touch electrode, criss-cross scanning lines, data lines and a plurality of pixel units defined by the scanning lines and the data lines in a crossed manner, wherein each row of pixel units is controlled by one row of scanning lines; the touch electrode is divided into a plurality of independent touch electrode blocks, and the touch electrode blocks are arranged in a dot matrix manner; each touch electrode block is connected to the integrated drive circuit through a touch signal transmission line; each touch electrode block corresponds to a plurality of rows of pixel units;
a touch electrode disconnection part is arranged between two adjacent rows of touch electrode blocks; a row of touch electrode blocks located at the upper side of a certain touch electrode disconnection position is a first touch electrode block, a plurality of rows of pixel units corresponding to the first touch electrode block are first pixel units, a plurality of scanning lines sequentially connected with the first pixel units are first scanning lines, a row of touch electrode blocks located at the lower side of the touch electrode disconnection position is a second touch electrode block, a plurality of rows of pixel units corresponding to the second touch electrode block are second pixel units, and a plurality of scanning lines sequentially connected with the second pixel units are second scanning lines;
the display panel also comprises a plurality of compensation signal line groups respectively corresponding to the disconnected positions of the touch control electrodes, and each compensation signal line group comprises at least one compensation pull-down signal line;
when a scanning signal of a second scanning line is a rising edge at the same time when a scanning signal of a first scanning line is a falling edge, or when a scanning signal of a second scanning line is a falling edge at the same time when a scanning signal of a first scanning line is a rising edge, the first scanning line is an abnormal first scanning line, and the corresponding second scanning line is an abnormal second scanning line;
each compensation pull-down signal line is electrically connected with one abnormal second scanning line and is overlapped with the first touch electrode block where the corresponding abnormal first scanning line is located.
Preferably, each of the compensation signal line groups further includes at least one compensation pull-up signal line;
each compensation pull-up signal line is electrically connected with one abnormal first scanning line respectively and is overlapped with the second touch electrode block where the corresponding abnormal second scanning line is located.
Preferably, each compensation pull-down signal line includes a pull-down overlap signal line, a pull-down left connection line, and a pull-down right connection line; the pull-down overlapped signal line extends along the row direction, the pull-down overlapped signal line part is overlapped with the first touch electrode block where the abnormal first scanning line is located, and the left end and the right end of the pull-down overlapped signal line respectively extend to the left side and the right side of the display panel; the pull-down left side connecting line is electrically connected with the left end of the pull-down overlapping signal line and the abnormal second scanning line, and the pull-down right side connecting line is electrically connected with the right end of the pull-down overlapping signal line and the abnormal second scanning line.
Preferably, a capacitance generated between the pull-down overlap signal line and the first touch electrode block where the abnormal first scan line is located is equal to a capacitance generated between a row of the first scan line and the first touch electrode block where the row of the first scan line is located.
Preferably, each compensation pull-up signal line comprises a pull-up superposition signal line, a pull-up left connecting line and a pull-up right connecting line; the upward-pulling overlapped signal line extends along the row direction, the upward-pulling overlapped signal line part is overlapped with the second touch electrode block where the abnormal second scanning line is located, and the left end and the right end of the upward-pulling overlapped signal line respectively extend to the left side and the right side of the display panel; the upper-pulling left-side connecting wire is electrically connected with the left end of the upper-pulling overlapped signal wire and the abnormal first scanning wire, and the upper-pulling right-side connecting wire is electrically connected with the right end of the upper-pulling overlapped signal wire and the abnormal first scanning wire.
Preferably, the capacitance generated between the second touch electrode block where the pull-up overlap signal line and the abnormal second scan line are located is equal to the capacitance generated between a row of second scan lines and the second touch electrode block where the row of second scan lines are located.
Preferably, the display panel comprises 1 st, 2 nd, … … th, n-2 th, n-1 th, n +1 th, … … th, m-1 th and m th rows of pixel units in sequence from top to bottom along the column direction, and comprises 1 st, 2 th, … … th, n-2 th, n-1 th, n +1 th, … … th, m-1 th and m th rows of scanning lines respectively corresponding to the rows of pixel units; the n-1 th row of pixel units is a tail row of first pixel units in the first touch electrode area block, and the n th row of pixel units is a head row of second pixel units in the second touch electrode area block; wherein m is greater than n +1, and n and m are positive integers;
each compensation signal line group comprises a first compensation pull-down signal line, a second compensation pull-down signal line, a first compensation pull-up signal line and a second compensation pull-up signal line;
the first compensation pull-down signal line is electrically connected with the (n +1) th row of scanning lines and has overlap with the (n-1) th row of pixel units; the second compensation pull-down signal line is electrically connected with the nth row of scanning lines and has overlap with the (n-2) th row of pixel units;
the first compensation pull-up signal line is electrically connected with the (n-2) th row of scanning lines and is overlapped with the nth row of pixel units; the second compensation pull-down signal line is electrically connected with the (n-1) th row of scanning lines and has overlap with the (n +1) th row of pixel units.
Preferably, a thin film transistor is arranged in each pixel unit, and the thin film transistor comprises a gate, a gate insulating layer covering the gate, a semiconductor substrate positioned on the gate insulating layer, and a source drain electrode layer positioned on the semiconductor substrate;
the compensation pull-down signal line, the compensation pull-up signal line and the grid are formed by patterning the same metal layer.
Preferably, a thin film transistor is arranged in each pixel unit, and the thin film transistor comprises a gate, a gate insulating layer covering the gate, a semiconductor substrate positioned on the gate insulating layer, and a source drain electrode layer positioned on the semiconductor substrate;
the compensation pull-down signal line, the compensation pull-up signal line and the source drain electrode layer are formed by patterning the same metal layer.
Preferably, a thin film transistor and a pixel electrode are arranged in each pixel unit; the thin film transistor comprises a grid, a grid insulation layer covering the grid, a semiconductor substrate positioned on the grid insulation layer, and a source drain electrode layer positioned on the semiconductor substrate; the pixel electrode is electrically connected with the source drain electrode layer;
the compensation pull-down signal line, the compensation pull-up signal line and the pixel electrode are formed by patterning the same layer of transparent conductive film.
Compared with the prior art, the invention can bring at least one of the following beneficial effects:
1. the compensation signal line group is arranged corresponding to the disconnected position of the touch electrode, and compensates voltage deviation caused by jumping of a scanning signal on the touch electrode block by forming a parasitic capacitor with the pixel unit, so as to avoid generating cross striations near the touch electrode boundary;
2. the front-stage scanning signal or the rear-stage scanning signal is used as the compensation signal of the input compensation signal line group, and the design is simple.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic structural diagram of a conventional self-contained in-cell touch display panel;
FIG. 2 is a schematic structural diagram of two adjacent touch electrodes in the display panel shown in FIG. 1;
FIG. 3 is a schematic waveform diagram of a multi-level scanning signal and a touch electrode potential in the display panel shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic waveform diagram of multi-level scanning signals during forward scanning of the display panel shown in FIG. 4;
FIG. 6 is a waveform diagram of multi-level scan signals during a reverse scan of the display panel shown in FIG. 4;
FIG. 7 is a schematic diagram of a pixel structure of a conventional self-contained in-cell touch display panel;
fig. 8 is a schematic cross-sectional view taken along line AA' in fig. 7.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. Herein, when a first element is described as being "connected" to a second element, the first element may be directly connected to the second element or indirectly connected to the second element through one or more additional elements. Further, certain elements that are not necessary for a full understanding of the invention have been omitted for clarity.
The display panel of the present invention includes: the touch panel comprises touch electrodes, criss-cross scanning lines and data lines, a plurality of pixel units defined by the intersection of the scanning lines and the data lines and a plurality of compensation signal line groups. The touch electrode is divided into a plurality of independent touch electrode blocks, the touch electrode blocks are arranged in a dot matrix manner, and each touch electrode block is connected to an integrated drive circuit (IC) through a touch signal transmission line; each touch electrode block corresponds to a plurality of rows of pixel units, each row of pixel units is controlled by a row of scanning lines, and the scanning lines sequentially output high-level scanning signals.
A touch electrode breaking point 104 (as shown in fig. 2) is disposed between two adjacent rows of touch electrode blocks, and the scan line extending direction is taken as the row direction, the data line extending direction is taken as the column direction, and the touch electrode breaking point 104 extends along the row direction. To specifically explain the technical solution of the present invention, taking a touch electrode disconnection 104 and two rows of touch electrode blocks at the upper and lower sides thereof as an example, a row of touch electrode blocks located at the upper side of the touch electrode disconnection 104 is referred to as a first touch electrode block 102, a plurality of rows of pixel units corresponding to the first touch electrode block 102 are referred to as first pixel units, and a plurality of scan lines sequentially connected to the first pixel units are referred to as first scan lines; a row of touch electrode blocks located below the touch electrode disconnection portion 104 is referred to as a second touch electrode block 103, a plurality of rows of pixel units corresponding to the second touch electrode block are referred to as second pixel units, and a plurality of scan lines sequentially connected to the second pixel units are referred to as second scan lines.
When a scan signal of a second scan line is a rising edge (i.e., rising from a low level to a high level) at the same time when a scan signal of a first scan line is a falling edge (i.e., falling from a high level to a low level), or when a scan signal of a second scan line is a falling edge at the same time when a scan signal of a first scan line is a rising edge, the first scan line is an abnormal first scan line, and the corresponding second scan line is an abnormal second scan line. According to the timing difference between the two adjacent stages of scanning signals, there may be one pair, two pairs or more pairs of the abnormal first scanning line and the corresponding abnormal second scanning line.
Each compensation pull-down signal line is electrically connected with one abnormal second scanning line, and is overlapped with the first touch electrode block 102 where the corresponding abnormal first scanning line is located.
Each compensation signal line group may further include at least one compensation pull-up signal line, and each compensation pull-up signal line is electrically connected to one abnormal first scan line and overlaps with the second touch electrode block 103 where the corresponding abnormal second scan line is located.
When the scanning signal of the abnormal first scanning line is a falling edge, the scanning signal of the abnormal second scanning line is a rising edge, and because the abnormal first scanning line and the corresponding abnormal second scanning line are not located in the same touch electrode area block, the abnormal second scanning line cannot directly pull up the potential of the first touch electrode area block 102, and the influence of the abnormal first scanning line on the pull-down of the potential of the first touch electrode area block 102 cannot be directly counteracted. Since the scan lines sequentially output high-level scan signals, there is no rising edge of the scan signal of the first scan line.
The display panel is internally provided with a compensation pull-down signal line electrically connected with the abnormal second scanning line, the compensation pull-down signal line is overlapped with the first touch electrode block where the corresponding abnormal first scanning line is positioned, and the electric potential of the first touch electrode block 102 is pulled up through a capacitor generated by the overlapping so as to counteract the pull-down influence of the abnormal first scanning line on the electric potential of the first touch electrode block 102 and avoid generating horizontal stripes near the interface of the touch electrodes.
Preferably, when the display panel has a bidirectional scanning function, each compensation signal line group of the display panel further includes at least one compensation pull-up signal line, the compensation pull-up signal line is electrically connected to one abnormal first scan line, and overlaps with the second touch electrode block where the corresponding abnormal second scan line is located, and has a function corresponding to the compensation pull-down signal line when the display panel is scanned in a reverse direction.
It should be noted that, when the display panel is only scanned in one direction, the compensation pull-up signal line can also be used to eliminate the horizontal stripes near the interface of the touch electrode. For the second pixel units connected to the abnormal second scanning line in one row, the abnormal second scanning line has a pull-up effect on the potential of the second touch electrode block 103 when the scanning signal of the abnormal second scanning line is at the rising edge; meanwhile, the abnormal first scan line corresponding to the compensation pull-down signal line is at the falling edge, the compensation pull-down signal line overlaps with the second pixel unit, and the potential of the second touch electrode block 103 is pulled down through a capacitance generated by the overlap, so as to counteract the pull-up influence of the abnormal second scan line on the potential of the second touch electrode block 103.
After the scanning signal on the abnormal first scanning line is at the falling edge, the thin film transistor in the first pixel unit connected with the abnormal first scanning line is turned off, and the voltage difference in the liquid crystal box is determined; when the scanning signal on the abnormal second scanning line is at the rising edge, the thin film transistor in the second pixel unit connected with the abnormal second scanning line is turned on, and the voltage difference in the liquid crystal box can still be adjusted back to the preset value within the time of turning on the thin film transistor. Therefore, when the display panel scans in the forward direction, the compensation pull-down signal line has a better effect than the compensation pull-up signal line; when the display panel is scanned reversely, the compensation pull-up signal lines have better effect than the compensation pull-down signal lines.
Each compensation pull-down signal line comprises a pull-down overlapping signal line, a pull-down left connecting line and a pull-down right connecting line; the pull-down overlapped signal lines extend along the row direction, the pull-down overlapped signal line part is overlapped with the first touch electrode block 102 where the abnormal first scanning line is located, and the left end and the right end of each pull-down overlapped signal line respectively extend to the left side and the right side of the display panel; the pull-down left connecting line is electrically connected with the left end of the pull-down overlapped signal line and the corresponding abnormal second scanning line, and the pull-down right connecting line is electrically connected with the right end of the pull-down overlapped signal line and the abnormal second scanning line. The capacitance generated between the pull-down overlap signal line and the first touch electrode block 102 where the abnormal first scan line is located is equal to the capacitance generated between a row of the first scan line and the first touch electrode block 102 where the row of the first scan line is located.
Each compensation pull-up signal line comprises a pull-up overlapped signal line, a pull-up left connecting line and a pull-up right connecting line; the upward-pulling overlapped signal lines extend along the row direction, the upward-pulling overlapped signal line part is overlapped with the second touch electrode block 103 where the abnormal second scanning line is located, and the left end and the right end of each upward-pulling overlapped signal line respectively extend to the left side and the right side of the display panel; the pull-up left side connecting wire is electrically connected with the left end of the pull-up overlapped signal wire and the corresponding abnormal first scanning wire, and the pull-up right side connecting wire is electrically connected with the right end of the pull-up overlapped signal wire and the abnormal first scanning wire. The capacitance generated between the second touch electrode block 103 where the pull-up overlap signal line and the abnormal second scan line are located is equal to the capacitance generated between a row of second scan lines and the second touch electrode block 103 where the row of second scan lines are located.
The display panel of the invention is provided with a compensation signal line group corresponding to the touch electrode disconnection part 104, a plurality of compensation pull-up signal lines or compensation pull-down signal lines in the compensation signal lines form parasitic capacitance with the touch electrode blocks, and a preceding-stage scanning signal or a subsequent-stage scanning signal is taken as a compensation signal for inputting the compensation signal line group to compensate voltage deviation caused by scanning signal jumping on the touch electrode blocks, thereby avoiding generating cross striations near the touch electrode junctions.
The first embodiment is as follows:
the display panel of the embodiment includes, in order from top to bottom along a column direction, rows 1, 2, … …, n-2, n-1, n +1, … …, m-1, and m of pixel units 101, and includes rows 1, 2, … …, n-2, n-1, n +1, … …, m-1, and m of scan lines corresponding to the rows of pixel units 101, respectively, where m > n +1, and n and m are positive integers.
As shown in fig. 4, the n-1 th row of pixel units is a last row of first pixel units in the first touch electrode block 102, and the n-th row of pixel units is a first row of second pixel units in the second touch electrode block 103. The scanning signal Gn-1 of the n-1 th row of the scanning line is input to the pixel units of the n-1 th row, the scanning signal Gn-2 of the n-2 th row of the scanning line is input to the pixel units of the n-2 th row, and the scanning signals Gn-3, Gn-4 and the like are input to the pixel units of the more than one row in sequence. The nth row scanning line inputs the nth scanning signal Gn to the nth row pixel units, the (n +1) th row scanning line inputs the (n +1) th scanning signal Gn +1 to the (n +1) th row pixel units, and the scanning signals Gn +2, Gn +3 and the like are sequentially input to the following rows of pixel units.
The display panel includes a plurality of compensation signal line groups, which respectively correspond to the plurality of touch electrode disconnection portions 104. In the present embodiment, the compensation signal line group corresponding to a touch electrode disconnection 104 includes a first compensation pull-down signal line 201, a second compensation pull-down signal line 202, a first compensation pull-up signal line 203, and a second compensation pull-up signal line 204.
The first compensation pull-down signal line 201 is electrically connected with the (n +1) th row of scanning lines and has an overlap with the (n-1) th row of pixel units; the second compensation pull-down signal line 202 is electrically connected to the nth row of scan lines and overlaps the nth-2 row of pixel units. The first compensation pull-up signal line 203 is electrically connected with the scanning line of the (n-2) th row and is overlapped with the pixel units of the (n) th row; the second compensation pull-up signal line 204 is electrically connected to the scan line of the (n-1) th row and overlaps with the pixel units of the (n +1) th row.
When the display panel scans in the forward direction, the waveforms of the scanning signals Gn-4, Gn-3, … …, Gn +2 and Gn +3 are as shown in FIG. 5, and the rising edge of the scanning signal (i.e. Gn +1) on the scanning line of the (n +1) th row is positioned at the same time as the falling edge of the scanning signal (i.e. Gn-1) on the scanning line of the (n-1) th row; the rising edge of the scanning signal (namely Gn) on the scanning line of the nth row is positioned at the same time with the falling edge of the scanning signal (namely Gn-2) on the scanning line of the (n-2) th row.
When Gn-1 is located at the falling edge, the scanning line of the (n-1) th row generates a pull-down influence on the potential of the first touch electrode block 102; meanwhile, the (n +1) th row of scanning lines connected with the first compensation pull-down signal line 201 are positioned at the rising edge, the first compensation pull-down signal line 201 and the (n-1) th row of pixel units are overlapped, a first compensation pull-down capacitor is formed at the overlapped part, the first compensation pull-down signal line 201 pulls up the potential of the first touch electrode block 102 through the first compensation pull-down capacitor so as to counteract the pull-down influence of the (n-1) th row of scanning lines on the potential of the first touch electrode block 102 and avoid generating cross striations near the touch electrode junction.
When Gn-2 is located at the falling edge, the scanning line of the (n-2) th row generates a pull-down influence on the electric potential of the nearby first touch electrode block 102; meanwhile, the nth row of scanning lines connected with the second compensation pull-down signal line 202 is at a rising edge, the second compensation pull-down signal line 202 and the nth-2 row of pixel units are overlapped, a second compensation pull-down capacitor is formed at the overlapped part, and the second compensation pull-down signal line 202 pulls up the potential of the first touch electrode block 102 through the second compensation pull-down capacitor so as to counteract the pull-down influence of the nth-2 row of scanning lines on the potential of the first touch electrode block 102 and avoid generating cross striations near the touch electrode boundary.
When the display panel scans reversely, the waveforms of the scanning signals Gn-4, Gn-3, … …, Gn +2 and Gn +3 are as shown in FIG. 6, and the rising edge of the scanning signal on the scanning line of the (n-1) th row is at the same time as the falling edge of the scanning signal on the scanning line of the (n +1) th row; the rising edge of the scanning signal on the scanning line of the n-2 th row and the falling edge of the scanning signal on the scanning line of the n-2 th row are positioned at the same time.
When Gn is located at the falling edge, the nth row of scanning lines generates a pull-down influence on the potential of the nearby second touch electrode block 103; meanwhile, the n-2 th row of scanning lines connected with the first compensation pull-up signal line 203 is just at a rising edge, the first compensation pull-up signal line 203 and the n-th row of pixel units are overlapped, a first compensation pull-up capacitor is formed at the overlapped part, and the first compensation pull-up signal line 203 pulls up the potential of the second touch electrode block 103 through the first compensation pull-up capacitor so as to counteract the pull-down influence of the n-th row of scanning lines on the potential of the second touch electrode block 103 and avoid generating cross striations near the touch electrode boundary.
The first compensation pull-down signal line 201 includes a first pull-down overlap signal line, a first pull-down left connection line, and a first pull-down right connection line. The first pull-down overlapped signal line extends along the row direction, a part of the first pull-down overlapped signal line is overlapped with the pixel units in the (n-1) th row to form a first compensation pull-down capacitor, and the size of the first compensation pull-down capacitor is close to or equal to the size of a capacitor formed by the scanning line in the (n-1) th row and the first touch electrode block 102. The display panel comprises a display area and non-display areas located on the periphery of the display area, the left end and the right end of each pull-down overlapping signal line extend to the non-display areas on the left side and the right side of the display panel respectively, a first pull-down left connecting line extending along the column direction is electrically connected with the left end of each first pull-down overlapping signal line and the n +1 th scanning line, and a first pull-down right connecting line extending along the column direction is electrically connected with the right end of each first pull-down overlapping signal line and the n +1 th scanning line.
Preferably, the VA-mode liquid crystal display panel usually adopts four-domain or eight-domain alignment to generate swastika-shaped black stripes in the pixel units, the IPS-mode liquid crystal display panel usually adopts two-domain alignment to generate one-shaped or i-shaped black stripes in the pixel units, and the first pull-down overlap signal lines are overlapped with the n-1 th row of pixel units in the middle of the pixel units, so that the influence of the first compensation pull-down signal lines 201 on the pixel aperture ratio can be reduced.
Similarly, the second compensation pull-down signal line 202, the first compensation pull-up signal line 203, and the second compensation pull-up signal line 204 have corresponding structures.
It should be noted that the routing manner of each compensation pull-down signal line or compensation pull-up signal line is not limited to this, and other straight routing or bending routing manners may be adopted, and the signal lines may penetrate through the display area of the display panel from left to right, or only one end of each compensation pull-down signal line or compensation pull-up signal line may be connected to the scan line. The length and width of each compensation pull-down signal line or compensation pull-up signal line can be designed at will, and only the size of a parasitic capacitor formed between the compensation pull-down signal line or the compensation pull-up signal line and the touch electrode block needs to be considered.
Preferably, the display panel further comprises a plurality of area compensation signal lines, the area compensation signal lines overlap with the pixel electrodes of the rows except the n-2 th, n-1 th, n +1 th row, and no voltage is applied, so that the aperture ratios of the pixel units of the rows of the display panel are consistent. In other embodiments, the aperture ratio can be consistent by adjusting the black matrix design of the display panel.
Fig. 7 and 8 show a pixel structure of a conventional self-capacitance in-cell touch display panel, in which a gate electrode 1, a gate insulating layer (not shown) covering the gate electrode 1, and a semiconductor substrate 2 on the gate insulating layer are disposed in each pixel unit, and a source/drain electrode layer 7 on the semiconductor substrate 2 forms a thin film transistor; the pixel electrode 8 in each pixel unit is electrically connected with the source drain electrode layer 7 through a first contact hole 9, the touch electrode 5 is positioned on the data line 3 and is separated from the data line 3 by a first insulating layer 10, the touch signal transmission line 4 is positioned on the touch electrode 5 and is separated from the touch electrode 5 by a second insulating layer 11, and the touch electrode 5 is connected with the touch signal transmission line 4 through a second contact hole 6. In order to increase the pixel aperture ratio, the touch signal transmission line 4 is usually disposed directly above the data line 3 and spaced apart from the touch electrode 5 by the second insulating layer 11. Fig. 8 is a schematic sectional view taken along line AA' in fig. 7, in which upper and lower film layers not related to the present invention are omitted.
The compensation pull-down signal line and the compensation pull-up signal line in the display panel can be formed by patterning the same metal layer with the grid 1, or by patterning the same metal layer with the source drain electrode layer 7, or by patterning the same transparent conductive film with the pixel electrode 8, or by patterning the same metal layer or the transparent conductive film. The compensation pull-down signal line and the compensation pull-up signal line can be made of metal materials such as aluminum, copper, silver and the like, and can also be made of transparent conductive materials such as indium tin oxide and the like.
It should be noted that each compensation signal line group in the present invention may include only a compensation pull-down signal line, only a compensation pull-up signal line, or both a compensation pull-down signal line and a compensation pull-up signal line. The number of compensation pull-down signal lines (or compensation pull-up signal lines) in each compensation signal line group is not limited to two, and may be any value greater than or equal to one.
The display panel of the present invention is applicable not only to a thin film transistor using IGZO as a semiconductor material and an IPS display mode, but also to other semiconductor materials such as a-Si and LTPS, and other display modes such as TN and VA.
It should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and it should be noted that, for those skilled in the art, it is possible to make various modifications and amendments within the technical concept of the present invention without departing from the principle of the present invention, and various modifications, amendments and equivalents of the technical solution of the present invention should be regarded as the protection scope of the present invention.
Claims (10)
1. A display panel comprises touch electrodes, criss-cross scanning lines and data lines and a plurality of pixel units defined by the intersection of the scanning lines and the data lines, wherein each row of pixel units is controlled by one row of scanning lines; the touch electrode is divided into a plurality of independent touch electrode blocks, and the touch electrode blocks are arranged in a dot matrix manner; each touch electrode block is connected to the integrated drive circuit through a touch signal transmission line; each touch electrode block corresponds to a plurality of rows of pixel units;
a touch electrode disconnection part is arranged between two adjacent rows of touch electrode blocks; a row of touch electrode blocks located at the upper side of a certain touch electrode disconnection position is a first touch electrode block, a plurality of rows of pixel units corresponding to the first touch electrode block are first pixel units, a plurality of scanning lines sequentially connected with the first pixel units are first scanning lines, a row of touch electrode blocks located at the lower side of the touch electrode disconnection position is a second touch electrode block, a plurality of rows of pixel units corresponding to the second touch electrode block are second pixel units, and a plurality of scanning lines sequentially connected with the second pixel units are second scanning lines;
the method is characterized in that: the display panel also comprises a plurality of compensation signal line groups respectively corresponding to the disconnected positions of the touch control electrodes, and each compensation signal line group comprises at least one compensation pull-down signal line;
when a scanning signal of a second scanning line is a rising edge at the same time when a scanning signal of a first scanning line is a falling edge, or when a scanning signal of a second scanning line is a falling edge at the same time when a scanning signal of a first scanning line is a rising edge, the first scanning line is an abnormal first scanning line, and the corresponding second scanning line is an abnormal second scanning line;
each compensation pull-down signal line is electrically connected with one abnormal second scanning line and is overlapped with the first touch electrode block where the corresponding abnormal first scanning line is located.
2. The display panel according to claim 1, characterized in that:
each compensation signal line group further comprises at least one compensation pull-up signal line;
each compensation pull-up signal line is electrically connected with one abnormal first scanning line respectively and is overlapped with the second touch electrode block where the corresponding abnormal second scanning line is located.
3. The display panel according to claim 1, characterized in that:
each compensation pull-down signal line comprises a pull-down overlapping signal line, a pull-down left connecting line and a pull-down right connecting line; the pull-down overlapped signal line extends along the row direction, the pull-down overlapped signal line part is overlapped with the first touch electrode block where the abnormal first scanning line is located, and the left end and the right end of the pull-down overlapped signal line respectively extend to the left side and the right side of the display panel; the pull-down left side connecting line is electrically connected with the left end of the pull-down overlapping signal line and the abnormal second scanning line, and the pull-down right side connecting line is electrically connected with the right end of the pull-down overlapping signal line and the abnormal second scanning line.
4. The display panel according to claim 3, wherein:
the capacitance generated between the pull-down overlapped signal line and the first touch electrode block where the abnormal first scanning line is located is equal to the capacitance generated between a row of the first scanning line and the first touch electrode block where the row of the first scanning line is located.
5. The display panel according to claim 2, characterized in that:
each compensation pull-up signal line comprises a pull-up overlapped signal line, a pull-up left connecting line and a pull-up right connecting line; the upward-pulling overlapped signal line extends along the row direction, the upward-pulling overlapped signal line part is overlapped with the second touch electrode block where the abnormal second scanning line is located, and the left end and the right end of the upward-pulling overlapped signal line respectively extend to the left side and the right side of the display panel; the upper-pulling left-side connecting wire is electrically connected with the left end of the upper-pulling overlapped signal wire and the abnormal first scanning wire, and the upper-pulling right-side connecting wire is electrically connected with the right end of the upper-pulling overlapped signal wire and the abnormal first scanning wire.
6. The display panel according to claim 5, wherein:
the capacitance generated between the pull-up overlapped signal line and the second touch electrode block where the abnormal second scanning line is located is equal to the capacitance generated between one row of second scanning lines and the second touch electrode block where the one row of second scanning lines is located.
7. The display panel according to claim 2, characterized in that:
the display panel sequentially comprises 1 st, 2 nd, … … th, n-2 th, n-1 th, n +1 th, … … th, m-1 th and m th rows of pixel units along the column direction from top to bottom, and comprises 1 st, 2 nd, … … th, n-2 th, n-1 th, n +1 th, … … th, m-1 th and m th rows of scanning lines respectively corresponding to the pixel units of each row; the n-1 th row of pixel units is a tail row of first pixel units in the first touch electrode area block, and the n th row of pixel units is a head row of second pixel units in the second touch electrode area block; wherein m is greater than n +1, and n and m are positive integers;
each compensation signal line group comprises a first compensation pull-down signal line, a second compensation pull-down signal line, a first compensation pull-up signal line and a second compensation pull-up signal line;
the first compensation pull-down signal line is electrically connected with the (n +1) th row of scanning lines and has overlap with the (n-1) th row of pixel units; the second compensation pull-down signal line is electrically connected with the nth row of scanning lines and has overlap with the (n-2) th row of pixel units;
the first compensation pull-up signal line is electrically connected with the (n-2) th row of scanning lines and is overlapped with the nth row of pixel units; the second compensation pull-down signal line is electrically connected with the (n-1) th row of scanning lines and has overlap with the (n +1) th row of pixel units.
8. The display panel according to claim 2, characterized in that:
a thin film transistor is arranged in each pixel unit, and the thin film transistor comprises a grid electrode, a grid electrode insulating layer covering the grid electrode, a semiconductor substrate positioned on the grid electrode insulating layer, and a source drain electrode layer positioned on the semiconductor substrate;
the compensation pull-down signal line, the compensation pull-up signal line and the grid are formed by patterning the same metal layer.
9. The display panel according to claim 2, characterized in that:
a thin film transistor is arranged in each pixel unit, and the thin film transistor comprises a grid electrode, a grid electrode insulating layer covering the grid electrode, a semiconductor substrate positioned on the grid electrode insulating layer, and a source drain electrode layer positioned on the semiconductor substrate;
the compensation pull-down signal line, the compensation pull-up signal line and the source drain electrode layer are formed by patterning the same metal layer.
10. The display panel according to claim 2, characterized in that:
a thin film transistor and a pixel electrode are arranged in each pixel unit; the thin film transistor comprises a grid, a grid insulation layer covering the grid, a semiconductor substrate positioned on the grid insulation layer, and a source drain electrode layer positioned on the semiconductor substrate; the pixel electrode is electrically connected with the source drain electrode layer;
the compensation pull-down signal line, the compensation pull-up signal line and the pixel electrode are formed by patterning the same layer of transparent conductive film.
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| CN110738973A (en) * | 2019-09-09 | 2020-01-31 | 福建华佳彩有限公司 | panel driving method |
| CN111162107B (en) * | 2020-01-02 | 2023-08-01 | 京东方科技集团股份有限公司 | Array substrate, display panel and display device |
| CN111103717A (en) * | 2020-01-10 | 2020-05-05 | 京东方科技集团股份有限公司 | Array substrate and display panel |
| CN113903283B (en) * | 2020-07-06 | 2023-10-13 | 敦泰电子股份有限公司 | Driving system and method of touch display panel |
| CN112578602B (en) * | 2020-12-04 | 2022-06-28 | 上海中航光电子有限公司 | Display panel and display device |
| CN115240608A (en) * | 2022-07-11 | 2022-10-25 | 京东方科技集团股份有限公司 | Display panel, display driving method and display touch device |
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