CN107065367B - Array substrate, touch display panel and touch display device - Google Patents
Array substrate, touch display panel and touch display device Download PDFInfo
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- CN107065367B CN107065367B CN201710468473.8A CN201710468473A CN107065367B CN 107065367 B CN107065367 B CN 107065367B CN 201710468473 A CN201710468473 A CN 201710468473A CN 107065367 B CN107065367 B CN 107065367B
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- 239000000758 substrate Substances 0.000 title claims abstract description 99
- 239000010409 thin film Substances 0.000 claims abstract description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims description 23
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 4
- 229920005591 polysilicon Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 18
- 238000011084 recovery Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
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- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
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- 230000006872 improvement Effects 0.000 description 2
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- 230000003247 decreasing effect Effects 0.000 description 1
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- 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
- G02F1/1333—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
- G02F1/1368—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
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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
- G06F3/0412—Digitisers structurally integrated in a display
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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Abstract
The invention provides an array substrate, a touch display panel and a touch display device. The array substrate comprises a substrate; a scan line extending in a first direction; a data line extending in a second direction, the first direction and the second direction being intersected with each other; the plurality of sub-pixels are arranged along a first direction and a second direction, and pixel electrodes are arranged in the sub-pixels; the thin film transistors are electrically connected with the data lines and the pixel electrodes; the touch electrode units are correspondingly and electrically connected with the touch electrode lines; in the first direction, at least one pixel electrode is a first pixel electrode in the pixel electrodes positioned at two sides of the touch electrode line, and the maximum width of the first pixel electrode in the first direction is smaller than the maximum width of other pixel electrodes in the first direction; wherein the other pixel electrode is a second pixel electrode. The array substrate provided by the invention can further avoid dark spots generated by a display panel and a display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to an array substrate, a display panel comprising the array substrate and a display device comprising the display panel.
Background
Liquid crystal display screens are a class of passive display devices that have low power consumption, low voltage drive, long life, and easy colorization. In recent years, touch display devices have become mainstream products in the market due to enhanced human-computer interaction. The built-in touch display screen has the characteristics of lightness and thinness due to the integration of the touch display device, and becomes an important component of the touch display device. When touch electrodes are added to the liquid crystal display screen to form a plurality of touch electrode units, a touch electrode wire needs to be arranged to connect the touch units and the integrated circuit of the liquid crystal display screen.
Patent CN103529576A discloses that when the touch electrode is disposed on the side of the array substrate of the liquid crystal display, the common electrode is usually reused as the touch electrode, and negative liquid crystal should be used to reduce the interference of liquid crystal molecules to the touch electrode signal. The negative liquid crystal has a large rotational viscosity coefficient and a slow response time, so that the transmittance is low under the same voltage. For an In-Plane Switching (IPS) display mode and a Fringe Field Switching (FFS) display mode, when changing from a positive liquid crystal to a negative liquid crystal, In order to increase an aperture ratio, an angle between an extending direction of a pixel electrode and a vertical direction is raised from 6 ° to 10 °. It should be noted that, for the IPS mode and the FFS mode, the pixel electrode is usually provided with a stripe-shaped opening, and the extending direction of the stripe-shaped opening is consistent with the extending direction of the pixel electrode, so the included angle between the extending direction of the pixel electrode and the vertical direction is also commonly referred to as the slit tilt angle (slitangle).
However, when the touch display device uses a negative liquid crystal and raises the slit angle to 10 °, the touch display panel is prone to generate dark spots.
Disclosure of Invention
Embodiments of the invention provide an array substrate, a display panel including the array substrate, and a display device including the display panel.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
in one aspect, an embodiment of the present invention provides an array substrate, where the array substrate includes: a substrate base plate; the scanning lines extend along a first direction, the data lines extend along a second direction, and the first direction and the second direction are mutually crossed; the plurality of sub-pixels are arranged along the first direction and the second direction, and a pixel electrode is arranged in one sub-pixel; a plurality of thin film transistors electrically connected to the data lines and the pixel electrodes; the touch electrode units are electrically connected with the touch electrode lines correspondingly; in the first direction, at least one of the pixel electrodes positioned on two sides of the touch electrode line is a first pixel electrode, and the maximum width of the first pixel electrode in the first direction is smaller than the maximum width of other pixel electrodes in the first direction; wherein the other pixel electrode is a second pixel electrode.
In another aspect, an embodiment of the present invention provides a display panel, which includes the array substrate;
in another aspect, an embodiment of the present invention provides a display device, which includes the display panel described above.
Based on the above technical solution, in the array substrate, the display panel and the display device provided in the embodiments of the present invention, by setting a part of the first pixel electrode, the pixel electrode and the bridge-crossing electrode connected to the touch electrode line and the touch electrode unit can be short-circuited, thereby preventing the display panel and the display device from generating dark spots.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an array substrate provided in the prior art;
FIG. 2 is a schematic cross-sectional view AA' of the array substrate shown in FIG. 1;
fig. 3 is a schematic structural diagram of an array substrate according to an embodiment of the present invention;
fig. 4 is a schematic view of a touch structure of an array substrate according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 3;
FIG. 6 is a schematic cross-sectional view of the array substrate shown in FIG. 3 at BB';
FIG. 7 is a schematic structural diagram of pixel electrodes with different widths of protrusions;
fig. 8 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 9 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 8;
fig. 10 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 10;
fig. 12 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 13 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 12;
fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
First, the inventors of the present application have made extensive studies to solve the problem that dark spots are easily generated in conventional display panels and display devices. According to the research results, the present application considers that the reasons that the display panel and the display device are easy to generate dark spots are as follows: the connecting touch electrode line and the touch electrode are electrically connected through the connecting electrode, and the connecting electrode is generally disposed on the same layer as the pixel electrode, so that when an included angle θ between the extending direction of the pixel electrode and the vertical direction is increased, the distance between the connecting electrode and the pixel electrode is decreased, and thus a short circuit is easily caused. Specifically, referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an array substrate provided in the prior art, and fig. 2 is a schematic cross-sectional diagram of the array substrate shown in fig. 1 at AA'. As shown in fig. 1 and fig. 2, the array substrate includes a substrate 10, a scan line 11 located at one side of the substrate 10, a data line 13 overlapped with the scan line 11 in an insulating manner, a touch electrode line 15 extending in the same direction as the data line 13, and a plurality of sub-pixels arranged in an array defined by the scan line 11 and the data line 13 which are crossed in an insulating manner; the array substrate further includes pixel electrodes 12 corresponding to the sub-pixels one by one, and connection electrodes 14 connecting the touch electrode lines 15 and the touch electrodes. The common electrode 16 is reused as a touch electrode, the pixel electrode 12 includes an extension portion 122 and a protrusion portion 124, the connection electrode 14 and the pixel electrode 12 are disposed on the same layer, and the connection electrode 14 is used for electrically connecting the touch electrode line 15 and the common electrode 16. As the resolution is improved, the distance between the connection electrode 14 and the protrusion 124 of the pixel electrode 12 is closer and closer, and particularly, when the array substrate is used for a display panel of negative liquid crystal, the distance S1 between the connection electrode 14 and the protrusion 124 of the pixel electrode 12 becomes smaller due to the improvement of the slit angle (slit angle). Currently, the distance between the pixel electrode 12 and the protrusion 124 is only 2.5 micrometers, and the current exposure limit is about 2 micrometers, plus process errors, thereby causing a short circuit between the protrusion 124 of the pixel electrode 12 and the connection electrode 14.
Referring to fig. 3 to 6, fig. 3 is a schematic structural diagram of an array substrate according to an embodiment of the present invention; fig. 4 is a schematic view of a touch structure of an array substrate according to an embodiment of the present invention; fig. 5 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 3; fig. 6 is a schematic cross-sectional view of the array substrate shown in fig. 3 at BB'. As shown in fig. 3, the array substrate 20 of the present embodiment; the liquid crystal display device includes a plurality of data lines 23 and a plurality of scan lines 21 disposed on one side of a substrate 20, the plurality of scan lines 21 and the plurality of data lines 23 being insulated from and intersecting each other, the scan lines 21 extending in a first direction X, the data lines 23 extending in a second direction Y, the first direction X and the second direction Y intersecting each other. The array substrate further comprises a plurality of sub-pixels, the plurality of sub-pixels are arranged along the first direction X and the second direction Y, and a pixel electrode 22 is arranged in one of the sub-pixels.
In this embodiment, the array substrate further includes a plurality of thin film transistors (not shown), and the thin film transistors are electrically connected to the data lines 23 and the pixel electrodes 22 disposed in the sub-pixels. Further, referring to fig. 4, the array substrate further includes a plurality of touch electrode units 262 and a plurality of touch electrode lines 25 extending along the second direction Y, and the touch electrode units 262 are electrically connected to the touch electrode lines 25 correspondingly. The touch electrode lines 25 are electrically connected to the IC, and the IC controls the touch electrode lines 25 to transmit the touch signals to the touch electrode units 262 one by one.
As shown in fig. 3, in the first direction X, at least one pixel electrode 22 of the pixel electrodes 22 located at two sides of the touch electrode line 25 is a first pixel electrode 22a, and the maximum width of the first pixel electrode 22a in the first direction X is smaller than the maximum width of the other pixel electrodes in the first direction X; the other pixel electrode 22 is a second pixel electrode 22 b.
In the pixel electrode 22 having the smallest distance between the protrusion of the pixel electrode 22 and the touch electrode line 25, a part of the pixel electrode 22 is the first pixel electrode 22 a. Alternatively, the touch electrode line 25 needs to be the first pixel electrode 22a through the pixel electrode 22 at the position electrically connected with the touch electrode where the distance between the protrusion of the pixel electrode 22 and the touch electrode line 25 is the smallest, because the position is to be provided with the connection electrode 24 provided on the same layer as the pixel electrode 22, the pixel electrode 22 and the connection electrode 24 are easily short-circuited. The connecting electrode 24 is used to electrically connect the touch electrode line 25 and the touch electrode. More specifically, referring to fig. 5 and 6, the maximum width of the first pixel electrode 22a in the first direction X is WmaxaThe maximum width of the second pixel electrode 22b in the first direction X is WmaxbAnd W ismaxaIs less than Wmaxb. As shown in fig. 6, the electrical connection between the touch electrode line 25 and the touch electrode 26 is achieved by the connection electrode 24 on the same layer as the pixel electrode 22. Due to WmaxaIs less than WmaxbAnd in the same array substrate, in the sub-pixels for display, the width of each sub-pixel in the first direction X is the same, so that the maximum width W of the first pixel electrode 22a in the first direction X is the samemaxaAs the distance S2 between the connection electrode 24 and the first pixel electrode 22a becomes wider after the decrease, the risk of short circuit between the connection electrode 24 and the first pixel electrode 22a can be reduced.
It should be noted that, in the structure shown in fig. 3, the connection electrode 24 is electrically connected to the touch electrode line 25 and the touch electrode 26 through two vias, while in the structure shown in fig. 6, the connection electrode 24 is electrically connected to the touch electrode line 25 through one via but not electrically connected to the touch electrode 26, because the connection electrode 24 is electrically connected to the touch electrode 26 through another via. In other embodiments of the present invention, the via hole located at position BB' in fig. 3 may be electrically connected between the connection electrode 24 and the touch electrode 26, and another via hole is electrically connected between the connection electrode 24 and the touch electrode line 25.
It should be noted that, in the array substrate provided in the embodiment of the present invention, optionally, the number of the first pixel electrodes 22a is matched with the number of the touch electrode lines 25. More specifically, the number of the first pixel electrodes 22a is matched with the number of the touch connection holes, that is, the number of the first pixel electrodes 22a is greater than or equal to the number of the touch connection holes, and is less than or equal to twice the number of the touch connection holes, where the touch connection holes are via holes connecting the touch electrodes and the touch electrode lines 25.
If the number of the touch connection holes corresponding to each touch electrode line 25 is the same, when one touch electrode line 25 is electrically connected with one touch electrode unit 262 only through one touch connection hole (that is, one connection electrode 24 is required to perform bridge-crossing electrical connection), the number of the first pixel electrodes 22a is greater than or equal to the number of the touch electrode lines 25 and less than or equal to twice the number of the touch electrode lines 25; when one touch electrode line 25 and one touch electrode unit 262 are electrically connected through two touch connection holes (i.e., two connection electrodes 24 are required to be electrically connected across a bridge), the number of the first pixel electrodes 22a is greater than or equal to twice the number of the touch electrode lines 25 and less than or equal to four times the number of the touch electrode lines 25.
The touch electrode line 25 includes a virtual touch electrode line electrically connected to the touch electrode through a touch connection hole, in addition to a touch electrode line connecting the touch electrode and the control unit. In practical applications, the touch electrode lines 25 and the touch electrodes may be electrically connected through a plurality of touch connection holes, and the number of touch connection holes corresponding to the virtual touch electrode line may be different from the number of touch connection holes corresponding to the touch electrode lines connected to other control portions, at this time, the number of the first pixel electrodes 22a needs to be determined according to the number of the entire touch connection holes.
It should be noted that, in the embodiment of the present invention, the touch electrode 26 is reused as a common electrode. At this time, in the display phase, each touch electrode unit 262 of the touch electrode 26 is simultaneously given a display signal; in the touch phase, the touch electrode unit 262 of the touch electrode 26 is given a touch signal. It should be noted that fig. 4 only shows a common touch electrode structure, i.e., a self-capacitance structure, but the touch electrode structure of the array substrate provided by the implementation of the present invention is not limited thereto. For example, a mutual capacitance structure may also be adopted, that is, the mutual capacitance structure includes a driving electrode and a sensing electrode, and the common mutual capacitance structure is: the touch screen comprises strip-shaped driving electrodes and strip-shaped sensing electrodes, wherein the strip-shaped driving electrodes and the strip-shaped sensing electrodes are mutually insulated and have overlapping areas.
Further, as shown in fig. 6, the common electrode 26 is located between the pixel electrode 22 and the substrate 20, that is, the array substrate provided by the embodiment of the present invention is that the common electrode 26 is located between the pixel electrode 22 and the substrate 20 (mid-com structure). In one pixel, the pixel electrode 22 needs to be electrically connected to the source/drain electrode of the thin film transistor, and the pixel electrode 22 and the source/drain electrode are connected through a pixel electrode via hole that penetrates through the insulating layer between the pixel electrode layer and the source/drain electrode metal layer. In addition, since the connection electrode 24 and the common electrode 26 are connected by a via hole, and the connection electrode 24 and the touch electrode line 25 are also connected by a via hole, a multi-gray-scale mask may be used to prepare a via hole of a pixel electrode, a via hole between the connection electrode 24 and the common electrode 26, and a via hole between the connection electrode 24 and the touch electrode line 25 by a one-step patterning process. The structure can reduce the use of a mask, thereby simplifying the process flow and reducing the production cost.
Alternatively, in an embodiment of the present invention, the pixel electrode 22 includes at least one bar-shaped electrode. As shown in the array substrate structure of fig. 3, each of the first pixel electrode 22a and the second pixel electrode 22b includes two strip electrodes. In other embodiments of the present invention, the pixel electrode may be configured to include one stripe electrode, or the number of stripe electrodes may be set to be equal to or greater than three, according to the resolution and other design requirements. Specifically, when the resolution is high, it is generally selected to set the number of the stripe electrodes of the pixel electrode to one to three.
Further alternatively, when the pixel electrode 22 includes a plurality of strip-shaped electrodes, a strip-shaped opening may be provided at the pixel electrode 22, and the pixel electrode 22 is divided into a plurality of strip-shaped electrodes by the strip-shaped opening. When the pixel electrode 22 includes two strip-shaped electrodes, as shown in fig. 3, two strip-shaped electrodes may be formed by providing openings in a strip shape. It should be noted that the pixel electrode in this embodiment includes a plurality of strip electrodes, and therefore, the array substrate provided in this embodiment may be used for in-plane switch (IPS) or Fringe Field Switch (FFS).
The implementation of the maximum width W of the first pixel electrode 22a in the first direction X is described belowmaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction XmaxbIn several embodiments.
In a first mode, the pixel electrode includes an extension portion and a protrusion portion, and a width of the protrusion portion of the first pixel electrode in the first direction is smaller than a width of the protrusion portion of the second pixel electrode in the first direction. As shown in fig. 5, firstThe pixel electrode 22a includes an extension portion 222a and a protrusion portion 224a connected to each other, and the second pixel electrode 22b includes an extension portion 222b and a protrusion portion 224 b. The width of the extension portion 222a of the first pixel electrode 22a in the first direction X is equal to the width of the extension portion 222b of the second pixel electrode 22b in the first direction X, the width of the protrusion 224a of the first pixel electrode 22a in the first direction X is L1, the width of the protrusion 224b of the second pixel electrode 22b in the first direction X is L2, and L1 is smaller than L2. Since L1 is smaller than L2, the maximum width W of the first pixel electrode 22a in the first direction XmaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction Xmaxb. The protrusion 224a of the first pixel electrode 22a is located at one end of the extension portion 222a, and the protrusion 224b of the second pixel electrode 22b is located at one end of the extension portion 222 b.
Further optionally, a width of the protrusion of the first pixel electrode in the first direction is equal to or less than 3.6 micrometers, and a width of the protrusion of the second pixel electrode in the first direction is equal to or more than 3.6 micrometers. Specifically, referring to fig. 7 and table 1, fig. 7 is a schematic structural diagram of pixel electrodes with different protrusion widths, and table 1 shows relevant test data of the corresponding display device when the protrusion of the pixel electrode has different lengths. In the first direction X, product P, in conjunction with FIG. 7 and Table 1aIn the pixel electrode, the width of the protrusion is La，LaIs 1.7 microns; in a first direction X, the product PbIn the pixel electrode, the width of the protrusion is Lb，LbIs 3.2 microns; in a first direction X, the product PcIn the pixel electrode, the width of the protrusion is Lc，LcIs 3.6 microns. Product P according to the test data of Table 1aThe recovery time of the transverse mother pull (trace mura) is 0.78s, and the product PbThe transverse mother pull recovery time of the product P is 0.59scThe transverse mother pull recovery time of (2) is 0.23s, and the product PaProduct PbAnd product PcThe penetration rate is the same.
As seen from table 1, the provision of the pixel electrode with the protrusion can improve the lateral mother pull, that is, the recovery time of the lateral mother pull is shorter as the protrusion width of the pixel electrode is increased. When the width of the protruding part of the pixel electrode is 3.6 micrometers, the recovery time of the transverse mother pull is 0.23s, and the recovery time can meet the requirements of most mobile phone manufacturers. Therefore, the width of the protruding portion of the second pixel electrode in the first direction is equal to or greater than 3.6 micrometers has enabled improvement in the lateral mother pull. Since the proportion of the first pixel electrode to the pixel electrode is small throughout the array substrate, even if the width of the protrusion of the first pixel electrode in the first direction is set to be less than 3.6 μm, no significant lateral mother pull is caused.
Further, as seen from table 1, even though the protrusion width of the pixel electrode is changed, the transmittance of the display device is not changed. That is, the protrusion width of the pixel electrode has no influence on the transmittance. Therefore, in an array substrate, setting the width of the protrusion of some pixel electrodes (i.e. the first pixel electrodes in the embodiment of the present invention) to be shorter than that of the protrusion of other pixel electrodes (i.e. the second pixel electrodes in the embodiment of the present invention) does not cause the transmittance of the display device to decrease, and does not cause the defect of uneven brightness.
TABLE 1 test data for display devices of different projection widths
| Product(s) | Protrusion width/micron | Transverse mother pull recovery time | Penetration rate |
| Pa | 1.7 | 0.78s | 3.14％ |
| Pb | 3.2 | 0.59s | 3.14％ |
| Pc | 3.6 | 0.23s | 3.14％ |
In addition, it should be noted that the first pixel electrodes 22a are disposed on two sides of the touch electrode line 25 in the embodiment of the present invention. In practical applications, among the pixel electrodes on both sides of the touch electrode line 25, the pixel electrode 22 having the projection closest to the connection electrode 24 is set as the first pixel electrode 22 a.
In the second mode, the width of the part of the strip-shaped electrodes of the first pixel electrode in the first direction is smaller than the width of the strip-shaped electrodes of the second pixel electrode in the first direction. Referring to fig. 8 and 9, fig. 8 is a schematic structural diagram of another array substrate according to an embodiment of the invention, and fig. 9 is a schematic structural diagram of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 8. It should be noted that the difference between the array substrate shown in fig. 8 and the array substrate shown in fig. 3 lies in the structure of the first pixel electrode 22a, and the description of the embodiment of the present invention is omitted for the same points. As shown in fig. 8 and 9, each of the first pixel electrode 22a and the second pixel electrode 22b includes two stripe-shaped electrodes. However, the two stripe electrodes of the first pixel electrode 22a are different in width in the first direction X, and the two stripe electrodes of the second pixel electrode 22b are the same in width in the first direction X. More specifically, the width of the stripe electrode of the second pixel electrode 22b in the first direction X is the same as the width of one stripe electrode of the first pixel electrodes 22 a. As shown in fig. 9, the two stripe electrodes of the first pixel electrode 22a have widths h in the first direction X1And h2Two strips of the second pixel electrode 22bThe width of the shape electrode in the first direction X is h1And h is1Greater than h2。
In the present embodiment, the widths of the protruding portions of the first pixel electrode 22a and the second pixel electrode 22b in the first direction X are the same, but the width of a part of the stripe electrodes in the first pixel electrode 22a in the first direction X is smaller than the width of the stripe electrodes of the second pixel electrode 22b in the first direction X, so that the maximum width W of the first pixel electrode 22a in the first direction X can be mademaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction Xmaxb。
In a third mode, the number of the strip-shaped electrodes of the first pixel electrode is smaller than that of the second pixel electrode. Referring to fig. 10 and 11, fig. 10 is a schematic structural diagram of another array substrate according to an embodiment of the present invention, and fig. 11 is a schematic structural diagram of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 10. It should be noted that the difference between the array substrate shown in fig. 10 and the array substrate shown in fig. 3 lies in the structure of the first pixel electrode 22a, and the description of the embodiment of the present invention is omitted for the same points. As shown in fig. 10 and 11, the first pixel electrode 22a includes one stripe electrode, and the second pixel electrode 22b includes two stripe electrodes. Wherein the widths of the protruding portions of the first pixel electrode 22a and the second pixel electrode 22b in the first direction X are equal, since the first pixel electrode 22a includes only one stripe electrode and the second pixel electrode 22b includes two stripe electrodes, the maximum width W of the first pixel electrode 22a in the first direction X is equalmaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction Xmaxb。
It should be noted that, when the present embodiment is applied to the IPS mode or the FFS mode, in order to ensure the aperture ratio of the sub-pixel corresponding to the first pixel electrode 22a, the width of one strip-shaped electrode in the first pixel electrode 22a in the first direction X may not be greater than or equal to the width of two strip-shaped electrodes in the second pixel electrode 22b and the width of the opening between the two strip-shaped electrodes in the first direction X, because if the first pixel electrode 22a is too wide, the width between the first pixel electrode 22a and the common electrode is mostly greaterA vertical electric field is formed between the first pixel electrode 22a and the common electrode, and a horizontal electric field that can pass through the liquid crystal layer is not present in a region having a large area above the first pixel electrode 22a, so that there is no way to control the rotation of the liquid crystal to cause display unevenness. That is, the maximum width W of the first pixel electrode 22a in the first direction X can be set by providing one stripe electrode of the first pixel electrode 22a and two stripe electrodes of the second pixel electrode 22bmaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction Xmaxb。
It should be further noted that fig. 10 and fig. 11 only illustrate one specific implementation of the present embodiment, but the present invention is not limited thereto. In other embodiments, the first pixel electrode 22a and the second pixel electrode 22b may each include a plurality of stripe electrodes, and if the slit distance between the stripe electrodes (i.e., the opening width of the pixel electrodes) is equal in each pixel electrode 22, the number of stripe electrodes of the first pixel electrode 22a is only required to be smaller than that of the stripe electrodes of the second pixel electrode 22 b. Preferably, the widths of the respective stripe electrodes in the first pixel electrodes 22a in the first direction X are equal, the widths of the respective stripe electrodes in the second pixel electrodes 22b in the first direction X are equal, and the width of the stripe electrode in the first pixel electrode 22a in the first direction X is equal to the width of the stripe electrode in the second pixel electrode 22b in the first direction X. The arrangement mode can make the brightness uniform when the display array substrate is applied to a display device, and the maximum width W of the first pixel electrode 22a in the first direction X can be easily controlled through the number difference of the strip-shaped electrodesmaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction XmaxbThereby preventing the occurrence of short circuits.
In a fourth mode, the pixel electrode includes an extending portion and a protruding portion, and an included angle between the extending portion of the first pixel electrode and the second direction Y is smaller than an included angle between the extending portion of the second pixel electrode and the second direction Y. Referring to fig. 12 and 13, fig. 12 is a schematic structural view of another array substrate according to an embodiment of the invention, and fig. 13 is a schematic structural view of a first pixel electrode and a second pixel electrode of the array substrate shown in fig. 12The two pixel electrodes are schematically shown in the structure. It should be noted that the difference between the array substrate shown in fig. 12 and the array substrate shown in fig. 3 lies in the structure of the first pixel electrode 22a, and the description of the embodiment of the invention is omitted for the same points. As shown in fig. 12 and 13, the first pixel electrode 22a includes an extension portion 222a and a protrusion portion 224a, and the second pixel electrode 22b includes an extension portion 222b and a protrusion portion 224 b. The extending portion 222a of the first pixel electrode 22a forms an included angle θ with the second direction Y1The angle between the extending portion 222b of the second pixel electrode 22b and the second direction Y is θ2And theta1Less than theta2. Since the included angle between the extending portion 222a of the first pixel electrode 22a and the second direction Y is small, the maximum width of the extending portion 222a of the first pixel electrode 22a in the first direction X is small. Since the width of the protrusion 224a of the first pixel electrode 22a and the width of the protrusion 224b of the second pixel electrode 22b in the first direction X are the same, the maximum width W of the first pixel electrode 22a in the first direction X ismaxaIs smaller than the maximum width W of the second pixel electrode 22b in the first direction XmaxbThereby preventing the occurrence of short circuits.
As shown in fig. 12, in the array substrate provided in this embodiment, the data lines 23 and the touch electrode lines 25 are parallel to each other and have the same extending direction, and the extending directions of the data lines 23 and the touch electrode lines 25 are parallel to the second direction Y. It should be noted that, in the structure shown in fig. 12, the data lines 23 and the touch electrode lines are both in a fold line extending structure, that is, the data lines 23 or the touch electrode lines 25 between two adjacent sub-pixels in the first direction X form a certain included angle with the second direction Y. Usually, the extending portion of the pixel electrode corresponding to the sub-pixel also forms an angle with the second direction.
In the prior art, the extending portion of the pixel electrode corresponding to the sub-pixel and the touch electrode line are parallel to each other, however, in the embodiment of the present invention, an included angle between the first pixel electrode and the touch electrode is greater than zero, and the extending portion of the second pixel electrode and the touch electrode line are parallel to each other. Specifically, as shown in fig. 13, an included angle between the touch electrode line 25 located between the first pixel electrode 22a and the second pixel electrode 22b and the second direction Y is also θ2That is, the extension portion 222b of the second pixel electrode 22b and the touch electrode line 25 are parallel to each other. Due to theta1Less than theta2Therefore, the included angle between the first pixel electrode 22a and the touch electrode line 25 is: theta2-θ1＞0。
Optionally, the array substrate provided in the embodiment of the present invention includes an active layer of the thin film transistor, which is a polysilicon material. Since the electron mobility of the polysilicon is relatively high, the thin film transistor using the polysilicon material as the active layer can be used in a high resolution display device. For a high-resolution display device, the array substrate provided by the embodiment of the invention can effectively reduce the risk of short circuit.
The embodiment of the invention also provides a display panel besides the array substrate. Referring to fig. 14, fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 12, the display panel 5 includes an array substrate 510, a color filter substrate 520, and a liquid crystal layer 530 located between the array substrate 510 and the color filter substrate 520. The array substrate 510 is the array substrate in any of the above embodiments or any implementation manners.
Further optionally, the liquid crystal layer 530 of the display panel 5 is a negative liquid crystal. Because the array substrate 510 provided by the embodiment of the invention is provided with the touch electrode, the interference of the liquid crystal layer 530 on the touch electrode can be reduced by setting the liquid crystal layer 530 as negative liquid crystal.
Finally, the embodiment of the invention also provides a display device. As shown in fig. 15, fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention. Specifically, the display device comprises a housing 2, a display panel 5, a camera 6 and a signal lamp 8, wherein the display panel 4 provides a display panel for any of the above embodiments.
The embodiment of the invention provides an array substrate, a display panel comprising the array substrate and a display device comprising the display panel. Wherein, the array substrate includes: a substrate base plate; the scanning lines extend along a first direction, the data lines extend along a second direction, and the first direction and the second direction are mutually crossed; the plurality of sub-pixels are arranged along the first direction and the second direction, and a pixel electrode is arranged in one sub-pixel; a plurality of thin film transistors electrically connected to the data lines and the pixel electrodes; the touch electrode units are electrically connected with the touch electrode lines correspondingly; in the first direction, at least one of the pixel electrodes positioned on two sides of the touch electrode line is a first pixel electrode, and the maximum width of the first pixel electrode in the first direction is smaller than the maximum width of other pixel electrodes in the first direction; wherein the other pixel electrode is a second pixel electrode. By arranging part of the first pixel electrode, the pixel electrode can be short-circuited with the bridge-crossing electrode connected with the touch electrode wire and the touch electrode unit, and dark spots are avoided.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. An array substrate, comprising:
a substrate base plate;
the scanning lines extend along a first direction, the data lines extend along a second direction, and the first direction and the second direction are mutually crossed;
the plurality of sub-pixels are arranged along the first direction and the second direction, and a pixel electrode is arranged in one sub-pixel;
a plurality of thin film transistors electrically connected to the data lines and the pixel electrodes;
the touch electrode units are electrically connected with the touch electrode lines correspondingly;
the touch electrode unit is electrically connected with the touch electrode wire through a connecting electrode, and the connecting electrode and the pixel electrode are arranged on the same layer;
in the first direction, at least one of the pixel electrodes positioned on two sides of the touch electrode line is a first pixel electrode, and the maximum width of the first pixel electrode in the first direction is smaller than the maximum width of other pixel electrodes in the first direction;
wherein the other pixel electrode is a second pixel electrode.
2. The array substrate of claim 1, wherein the pixel electrode comprises at least one stripe electrode.
3. The array substrate of claim 2, wherein a stripe-shaped opening is disposed at the pixel electrode, and the pixel electrode is divided into a plurality of stripe-shaped electrodes by the stripe-shaped opening.
4. The array substrate of claim 2, wherein the pixel electrode comprises an extension portion and a protrusion portion, and a width of the protrusion portion of the first pixel electrode in the first direction is smaller than a width of the protrusion portion of the second pixel electrode in the first direction.
5. The array substrate of claim 4, wherein the width of the protruding portion of the first pixel electrode in the first direction is less than 3.6 microns, and the width of the protruding portion of the second pixel electrode in the first direction is greater than or equal to 3.6 microns.
6. The array substrate of claim 2, wherein the width of the stripe-shaped electrodes of the first pixel electrode in the first direction is smaller than the width of the stripe-shaped electrodes of the second pixel electrode in the first direction.
7. The array substrate of claim 2, wherein the number of the strip-shaped electrodes of the first pixel electrode is less than the number of the strip-shaped electrodes of the second pixel electrode.
8. The array substrate of claim 2, wherein the pixel electrode comprises an extension portion and a protrusion portion, an included angle between the extension portion of the first pixel electrode and the touch electrode line is greater than zero, and the extension portion of the second pixel electrode and the touch electrode line are parallel to each other.
9. The array substrate of any one of claims 1-8, wherein the plurality of touch electrode units are multiplexed as a common electrode.
10. The array substrate of claim 9, wherein the common electrode is located between the pixel electrode and the substrate.
11. The array substrate of claim 9, wherein the active layer of the thin film transistor is a polysilicon material.
12. A touch display panel, comprising the array substrate of any one of claims 1 to 11, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate.
13. The touch display panel of claim 12, wherein the liquid crystal layer is a negative liquid crystal.
14. A touch display device comprising the touch display panel of any one of claims 12-13.
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