CN107844008B - Array substrate, detection method of array substrate and display panel - Google Patents
Array substrate, detection method of array substrate and display panel Download PDFInfo
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- CN107844008B CN107844008B CN201711080358.XA CN201711080358A CN107844008B CN 107844008 B CN107844008 B CN 107844008B CN 201711080358 A CN201711080358 A CN 201711080358A CN 107844008 B CN107844008 B CN 107844008B
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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
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- G02F1/136254—Checking; Testing
Abstract
The invention provides an array substrate, a detection method of the array substrate and a display panel, wherein the array substrate comprises a display area and a non-display area, the non-display area is provided with a first terminal and a second terminal, a shading electrode arranged opposite to a data line and a public electrode line arranged along the edge of a pixel electrode are arranged in the display area, the shading electrode is electrically communicated with the first terminal, the public electrode line is electrically communicated with the second terminal, and the shading electrode is electrically insulated from the public electrode line. The invention is convenient to monitor whether the short circuit occurs between the shading electrode and the pixel electrode because of the conductive particles so as to facilitate detection and repair, thereby improving the yield of products.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an array substrate, a detection method of the array substrate and a display panel.
[ background of the invention ]
The liquid crystal display has many advantages of thin body, power saving, no radiation, etc., and is widely used. Most of the existing liquid crystal displays in the market are backlight type liquid crystal displays, which include a liquid crystal panel and a backlight module (backlight module). The liquid crystal panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and a driving voltage is applied to the two glass substrates to control the rotation direction of the liquid crystal molecules so as to refract light rays of the backlight module out to generate a picture.
Among them, Thin Film Transistor-Liquid crystal displays (TFT-LCDs) have been rapidly developed and widely used in recent years because of their low power consumption, excellent picture quality, and high production yield. Specifically, the TFT-LCD may be implemented by two glass substrates, one liquid crystal layer sandwiched between the two glass substrates, an upper glass substrate being a color filter, and a lower glass substrate having a thin film transistor disposed thereon. When current passes through the thin film transistor, an electric field change is generated, and the change of the electric field causes the liquid crystal molecules to deflect, so that the polarization of light is changed, and the expected display picture is realized.
With the rapid development of TFT-LCD, the pixel design is increasingly refined, and 3T technology, DBS (dataline BM less) technology, is appeared in succession.
The 3T technology is specifically that three TFT switches are controlled by a same gate line (gate line), when the gate is turned on, two of the TFTs charge a main area (main) and a sub area (sub) of a Pixel electrode (Pixel), and simultaneously a third TFT leaks a part of the charges charged in the sub area to a common electrode line (atom) of the array substrate, so as to pull down the potential of the sub area, that is, to improve the large viewing angle by ensuring the potential difference between the main area and the sub area.
The DBS technology is to replace a conventional BM (Black Matrix) with a signal line of a DBS com (DBS electrode) on a Data line (Data line), so as to achieve an effect of shielding light on the Data line. The application of DBS technology can reduce the defect of reducing the pixel aperture ratio caused by BM pair failure and other factors.
When the DBS technology is used in combination with the 3T technology, the DBS com on the Data line and the Acom leaking from the third TFT are generally connected together through a via, i.e., the DBS com and the Acom are given the same potential. In pursuit of a higher open area, the distance between the DBS electrode and the pixel electrode is designed to be relatively close, and short (short circuit) is relatively likely to occur between the DBS electrode and the pixel electrode when large particles fall therebetween. Particularly, the Sub area of the pixel electrode is affected by the leakage of the third TFT to Acom, and the pixel electrode and the DBS electrode in the Sub area cannot maintain a constant potential, so that the short problem between the Sub area pixel electrode and the DBS electrode is not easy to detect and repair, and the yield loss is caused.
[ summary of the invention ]
An object of the present invention is to provide an array substrate, a method for detecting the array substrate, and a display panel, which aim to keep constant potentials of a pixel electrode and a DBS electrode, so as to monitor the short circuit of the pixel electrode conveniently, to repair the short circuit in time, and to improve the yield of products.
In order to solve the above problem, a preferred embodiment of the present invention provides an array substrate, which includes a display area and a non-display area, where the non-display area is provided with a first terminal and a second terminal, the display area includes a light-shielding electrode disposed opposite to a data line and a common electrode line disposed along an edge of a pixel electrode, the light-shielding electrode is electrically connected to the first terminal, the common electrode line is electrically connected to the second terminal, and the light-shielding electrode is electrically insulated from the common electrode line.
In the array substrate according to the preferred embodiment of the present invention, the light-shielding electrode and the pixel electrode are disposed in the same layer, and the common electrode line and the gate line are disposed in the same layer.
In the array substrate according to the preferred embodiment of the present invention, the light-shielding electrode is in a mesh shape, and includes a plurality of horizontal portions parallel to each other and a plurality of vertical portions parallel to each other, the plurality of horizontal portions are directly connected to the plurality of vertical portions, and each vertical portion is connected to the vertical portions on two adjacent sides.
In the array substrate according to the preferred embodiment of the present invention, the plurality of vertical portions are connected to the first terminal.
In the array substrate according to the preferred embodiment of the present invention, the light-shielding electrode further includes a connection portion, the plurality of vertical portions are connected to the connection portion, and the connection portion is connected to the first terminal.
In the array substrate according to the preferred embodiment of the present invention, the connection portion and the plurality of horizontal portions are parallel to each other, and the connection portion and the plurality of vertical portions are perpendicular to each other.
In the array substrate according to a preferred embodiment of the present invention, the array substrate includes: the pixel structure comprises a plurality of gate lines, a plurality of data lines and a plurality of pixel units, wherein the plurality of gate lines, the plurality of data lines and the plurality of gate lines are crossed and arranged to define the plurality of pixel units;
the shading electrode is arranged on the data line and covers the data line.
In the array substrate according to the preferred embodiment of the present invention, the vertical portion is disposed on the data line to shield the data line, and the horizontal portion is disposed between the gate line and the pixel unit.
In order to solve the above problem, a preferred embodiment of the present invention further provides a method for inspecting an array substrate, where the array substrate includes: the display device comprises a display area and a non-display area, wherein the non-display area is provided with a first terminal and a second terminal, the display area comprises a shading electrode arranged opposite to a data line and a public electrode line arranged along the edge of a pixel electrode, the public electrode line is electrically communicated with the second terminal, and the shading electrode is electrically insulated from the public electrode;
the detection method comprises the following steps: electrically connecting the shading electrode with the first terminal;
detecting whether the non-display area has abnormal movement;
and if the non-display area is detected to have abnormal movement, determining that conductive particles exist between the shading electrode and the pixel electrode.
In order to solve the above problem, a preferred embodiment of the present invention further provides a display panel, which includes a color filter substrate and an array substrate that are arranged opposite to each other, where the array substrate is any one of the array substrates described above, a common electrode is arranged on the color filter substrate, and a voltage applied to the first terminal is the same as a voltage applied to the common electrode.
Compared with the prior art, in the detection process of the array substrate, the shading electrode is electrically communicated with the first terminal, the common electrode wire is electrically communicated with the second terminal, and the shading electrode is electrically insulated from the common electrode wire; when the abnormal movement of the non-display area of the array substrate is detected, the conductive particles are judged to be arranged between the shading electrode and the pixel electrode, and the shading electrode and the pixel electrode are in short circuit. Therefore, the invention is convenient to monitor whether the short circuit occurs between the shading electrode and the pixel electrode due to the conductive particles, so as to facilitate detection and repair, and further improve the yield of products.
In order to make the aforementioned and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below:
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the display panel shown in fig. 1 in a direction a-a.
Fig. 3 is a schematic structural diagram of an array substrate according to an embodiment of the present invention.
Fig. 4 is another schematic structural diagram of an array substrate according to an embodiment of the invention.
Fig. 5 is another schematic structural diagram of an array substrate according to an embodiment of the invention.
Fig. 6 is an equivalent circuit diagram of the first transistor, the second transistor and the third transistor in cooperation with each other according to an embodiment of the present invention.
Fig. 7 is a schematic flow chart illustrating a method for inspecting an array substrate according to an embodiment of the present invention.
[ detailed description ] embodiments
Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In the drawings, elements having the same or similar structures are denoted by the same reference numerals.
An array substrate, a detection method of the array substrate, a display panel, and a detector for detecting the array substrate according to embodiments of the present invention are described below with reference to fig. 1 to 7.
As shown in fig. 1 to 7, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 2 is a cross-sectional view of the display panel shown in fig. 1 in a direction a-a, fig. 2 only shows one structure of the display panel, and only shows a partial structure of the display panel, which is not limited to the display panel. Fig. 3 is a schematic structural diagram of an array substrate according to an embodiment of the present invention. Fig. 4 is another schematic structural diagram of an array substrate according to an embodiment of the present invention, fig. 5 is another schematic structural diagram of an array substrate according to an embodiment of the present invention, and specifically, fig. 5 is a schematic diagram of a short circuit generated by conductive particles falling between a pixel electrode and a light shielding electrode in fig. 4. Fig. 6 is an equivalent circuit diagram of the first transistor, the second transistor and the third transistor in cooperation with each other according to an embodiment of the present invention. Fig. 7 is a schematic flow chart illustrating a method for inspecting an array substrate according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention discloses a display panel 10, where the display panel 10 includes a color film substrate 200, an array substrate 100, and a liquid crystal 300. It should be noted that the display panel 10 of the embodiment of the present invention may be applied to a display, that is, the display includes the display panel 10. The display may further include a backlight module, which may be used as a light source for providing sufficient light sources with uniform brightness and distribution.
The array substrate 100 may include a first substrate (not shown), a plurality of data lines 110, a plurality of gate lines 120, and pixel units 130, wherein the plurality of data lines 110, the plurality of gate lines 120, and the pixel units 130 are disposed on the first substrate. The first substrate is transparent, can be a glass plate, and is good in light transmission and convenient to set. It should be noted that the type of the first substrate in the embodiment of the present invention is not limited to a glass plate, and other types may be adopted, such as: a flexible plate. The plurality of data lines 110 and the plurality of gate lines 120 cross each other to define a plurality of pixel units 130, so as to control the display of the pixel units 130.
The color filter substrate 200 includes a second substrate (not shown), a color photoresist (not shown), and a common electrode (not shown), where the color photoresist and the common electrode are disposed on the second substrate. The second substrate is transparent, can adopt a glass plate, and has good light transmission and convenient arrangement. It should be noted that the type of the second substrate in the embodiment of the present invention is not limited to a glass plate, and other types may be adopted, such as: a flexible plate. It should be noted that, the color resists of the embodiments of the invention are not limited to this, for example: white photoresist. Wherein the common electrode is formed over the color photoresist. The color film substrate 200 in the embodiment of the invention may include a Black Matrix (BM) or may not include a BM. When the color film substrate comprises the BMs, the BMs are arranged among the color light resistors at intervals so as to realize the light shading effect.
The liquid crystal 300 is disposed between the array substrate 100 and the color filter substrate 200. In some embodiments, the array substrate 100 and the color filter substrate 200 are disposed opposite to each other.
The display panel 100 further includes a sealant 400, the sealant 400 is disposed between the array substrate 100 and the color film substrate 200, and the sealant 400 is disposed at the edges of the array substrate 100 and the color film substrate 200 to seal the array substrate 100 and the color film substrate 200, and simultaneously shield the edges of the array substrate 100 and the color film substrate 200.
The array substrate 100 of the display panel 10 is taken as an example for detailed description, and it should be noted that the following description of the structure of the array substrate 100 is also applicable to the display panel 10 and the display according to the embodiment of the invention.
In the embodiment of the invention, as shown in fig. 3 to 6, the array substrate 100 includes a plurality of gate lines 110, a plurality of data lines 120, and a plurality of pixel units 130. The plurality of data lines 120 and the plurality of gate lines 110 are disposed to intersect with each other to define a plurality of pixel units 130, and the plurality of gate lines 110 and the plurality of data lines 120 are respectively connected to the plurality of pixel units 130 to drive the pixel units 130 to display.
In the embodiment of the present invention, the pixel unit 130 includes a thin film transistor, a pixel electrode 133, a common electrode line 132, and a light shielding electrode 131, the light shielding electrode 131 and the pixel electrode 133 are disposed on the same layer, and the common electrode line 132 and the gate line 110 are disposed on the same layer.
The light-shielding electrode 131 and the data line 120 are disposed opposite to each other. Specifically, the light-shielding electrode 131 is disposed on the data line 120 and covers the data line 120 to shield the data line 120, thereby achieving the purpose of shielding light. The light-shielding electrode 131 is electrically insulated from the common electrode line 132.
In some embodiments, the light-shielding electrode 131 has a mesh structure, and the light-shielding electrode 131 includes a plurality of parallel horizontal portions 1311, a plurality of parallel vertical portions 1312, and a connecting portion 1313.
The horizontal portions 1311 and the vertical portions 1312 are connected to each other, the vertical portions 1212 are connected to the connecting portion 1313, and the connecting portion 1313 is connected to a connecting line 1314. Further, the plurality of horizontal portions 1311 and the plurality of connecting portions 1313 are disposed in parallel, the plurality of horizontal portions 1311 and the plurality of vertical portions 1312 are disposed perpendicular to each other, and the connecting portions 1313 and the vertical portions 1312 are disposed perpendicular. In some embodiments, each horizontal portion 1311 is connected 1312 to the vertical portions of adjacent sides. In the embodiment of the present invention, the vertical portion 1312, the horizontal portion 1311, and the connecting portion 1313 may not be vertically disposed, and the connecting portion 1313 and the horizontal portion 1311 may not be parallel to each other.
Specifically, the vertical portions 1312 are covered on the data lines 120, and the horizontal portions 1311 are disposed between the gate lines 110 and the pixel electrodes 133. The plurality of horizontal portions 1311 are directly connected to the plurality of vertical portions 1312 through between the gate lines 110 and the pixel electrodes 133.
In some embodiments, the light-shielding electrode 131 is electrically insulated from the common electrode line 132. Specifically, the light-shielding electrode 131 and the common electrode line 132 are separately disposed, and the light-shielding electrode 131 is not connected to the common electrode line 132 and cannot be conducted, so that even if the potential of the common electrode line 132 is unstable, the potential of the light-shielding electrode 131 is not affected. Thereby, the potential of the light-shielding electrode 131 is stabilized. In some embodiments, the potential of the light-shielding electrode 131 and the potential of the common electrode line 132 may be different or the same.
In the embodiment of the invention, the array substrate 100 may further include a display region 101 and a non-display region 102. The display area 101 is used for displaying images, characters, and the like, and the pixel unit 130 is located in the display area 101. The non-display area 102 does not display pictures or characters, and the non-display area 102 is provided with a first terminal 520 and a second terminal 510.
The first terminal 520 is electrically connected to the light-shielding electrode 131. Specifically, the first terminal 520 is connected to each vertical portion 1312, that is, the vertical portions 1312 are connected to the first terminal 520. More specifically, the vertical portions 1312 are all connected to the connecting portion 1313, the connecting portion 1313 is electrically connected to the connecting wire 1314, and the connecting wire 1314 is electrically connected to the first terminal 520. Thus, the first terminal 520 and the light-shielding electrode 131 are electrically connected by the connecting wire 1314, and the first terminal 520 and the light-shielding electrode 131 can be electrically conducted. In some embodiments, the first terminal 520 is loaded with the same voltage as the common electrode.
Wherein the second terminal 510 is electrically connected to the common electrode line 132. Note that a wire connecting the common electrode line 132 and the second terminal 510 is not shown in the figure.
In some embodiments, the light-shielding electrode 131 is electrically connected to the first terminal 520, and the potential of the light-shielding electrode 131 is the same as the potential of the first terminal 520. The first terminal 520 is loaded with the same potential as the common electrode of the color filter substrate 200. Accordingly, the potentials of the light-shielding electrode 131, the first terminal 520, and the common electrode are the same. The potential of the common electrode on the color filter substrate 200 is stable, so that the potential of the light-shielding electrode 131 is stable. Accordingly, the potential of the light-shielding electrode 131 is not varied under normal conditions, and further, the potential of the first terminal 520 is not varied, that is, the non-display region 102 of the array substrate 100 is not varied. Once the non-display area 102 of the array substrate 100 is altered, or the potential of the first terminal 520 is altered, it indicates that there is a short circuit between the light-shielding electrode 131 and the pixel electrode 133 due to the conductive particles 600.
In some embodiments, the potential of the light-shielding electrode 131 is the same as the potential of the common electrode of the color filter substrate 200, so that the cross voltage between the vertical portion 1312 of the light-shielding electrode 131 and the common electrode, which covers the data line 120, is substantially zero, and thus the liquid crystal between the vertical portion 1312 of the light-shielding electrode 131 and the common electrode is not substantially deflected, thereby achieving a better light-shielding effect, even if the color filter substrate 200 is not provided with a black matrix, the better light-shielding effect can also be achieved.
In the array substrate of the preferred embodiment of the present invention, the light-shielding electrode 131 is made of an indium tin oxide material, which has good conductivity and is convenient for material selection; indium tin oxide is transparent and is conveniently laid on the data line 120.
The pixel electrode 133 includes a main pixel electrode 1331 and a sub pixel electrode 1332. The main pixel electrode 1331 and the sub-pixel electrode 1332 are respectively positioned at both sides of the gate line 110. In some embodiments, the horizontal portion 1311 is disposed between the main pixel electrode 1331 and the gate line 110. Note that the pixel electrode 133 according to the embodiment of the present invention is not limited thereto.
The thin film transistors include a first thin film transistor 140, a second thin film transistor 150, and a third thin film transistor 160. The first thin film transistor 140 is connected to the main pixel electrode 1331, and is configured to control the main pixel electrode 1331; the second thin film transistor 150 is connected to the sub-pixel electrode 1332 for controlling the sub-pixel electrode 1332.
In some embodiments, the array substrate 100 further includes a first capacitor 170, a second capacitor 180, and a storage capacitor 190.
In some embodiments, the first thin film transistor 140 includes a first drain electrode, a first source electrode, and a first gate electrode; the second transistor 150 includes a second drain, a second source, and a second gate; the third transistor 160 includes a third source, a third drain, and a third gate.
Specifically, the first capacitor 170 is connected to the first drain, the second capacitor 180 is connected to the second drain, and the storage capacitor is connected to the second drain. The first gate, the second gate, and the third gate are respectively connected to the gate line 110, the first source and the second source are respectively connected to the data line 120, the second drain is connected to the third source, and the third drain is connected to the common electrode line 132 through the via hole 134.
In the embodiment of the present invention, the third thin film transistor 160 is connected to the common electrode line 132 through the third drain thereof, and drains a part of the charges of the sub-pixel electrode 1332 to the common electrode line 132, so as to pull down the potential of the sub-pixel electrode 1332 and increase the potential of the common electrode line 132.
In the array substrate according to the preferred embodiment of the present invention, the potential of the light-shielding electrode 131 is smaller than the potential of the common electrode line 132. In an actual production process, the potential of the common electrode on the color filter substrate 200 is generally the same as the potential of the common electrode line 132. Because the third transistor 160 is connected to the common electrode line 132 through the third drain of the third transistor 160, the charge of the sub-area pixel electrode 1332 is partially drained to the common electrode line 132, so as to lower the potential of the sub-area pixel electrode 1332, increase the potential of the common electrode line 132, make the potential of the common electrode less than the potential of the common electrode line 132, and further make the potential of the light-shielding electrode less than the potential of the common electrode line 132.
In some embodiments, the light-shielding electrode 131 may be connected to the first terminal 520 through a connection wire 1314 to detect whether the non-display region 102 of the array substrate 100 generates abnormal motion, so as to determine whether a short circuit occurs between the pixel electrode 133 and the light-shielding electrode 131. The embodiment of the invention is convenient for monitoring whether the pixel electrode 133 and the shading electrode 131 are short-circuited or not so as to facilitate detection and repair, thereby improving the yield of products.
Specifically, whether or not the potential of the light-shielding electrode 131 fluctuates can be detected from the potential of the first terminal 520, and if the fluctuation occurs, a short circuit occurs, and if the fluctuation does not occur, a short circuit does not occur. Therefore, the embodiment of the invention is convenient for monitoring whether the pixel electrode 133 and the shading electrode 131 are short-circuited or not so as to facilitate detection and repair, thereby improving the yield of products. Whether the pixel electrode 133 and the light-shielding electrode 131 in the array substrate 100 are short-circuited, specifically, whether the sub-area pixel electrode 1332 in the pixel electrode 133 and the light-shielding electrode 131 are short-circuited, and whether the main pixel electrode 1331 in the pixel electrode 133 and the light-shielding electrode 131 are short-circuited can be detected through the first terminal 520.
In the embodiment of the invention, the non-display region 102 may further include a blue photoresist 530, a green photoresist 540, and a red photoresist 550. It should be noted that the arrangement of the non-display area 102 is not limited to this, for example: the non-display area 102 may further include a white photoresist, etc.
In the embodiment of the invention, when the array substrate 100 is tested through the first terminal 520, the connection portion 1313 of the light-shielding electrode 131 is first connected to the connection line 1314, and the connection line 1314 is connected to the first terminal 520, so that the first terminal 520 is electrically connected to the light-shielding electrode 131 through the connection line 1314. Then, the potential of the light-shielding electrode 131 in the array substrate 100 is detected through the first terminal 520, and if the potential of the light-shielding electrode 131 does not fluctuate or fluctuate but maintains a stable potential, it indicates that the light-shielding electrode 131 is not short-circuited and there are no conductive particles between the light-shielding electrode 131 and the pixel electrode 133, as shown in fig. 4. Thus, the array substrate 100 does not need to be repaired.
In the detecting process, if the potential of the light-shielding electrode 131 is detected to be varied through the first terminal 520, that is, the potential of the light-shielding electrode 131 fluctuates, it indicates that there is the conductive particle 600 between the light-shielding electrode 131 and the pixel electrode 133, and a short circuit occurs due to the conductive particle 600, as shown in fig. 5. Therefore, the maintainer can remove the conductive particles 600 according to the detection result, so that the array substrate 100 can be repaired, the yield of products can be improved, and the display effect of the display can be improved.
In the embodiment of the present invention, when testing whether a short circuit occurs between the light-shielding electrode 131 and the pixel electrode 133, the light-shielding electrode 131 itself does not cause an inaccurate detection result due to an unstable potential thereof. In the embodiment of the present invention, the potential of the light-shielding electrode 131 is set to be the same as the potential of the common electrode, so as to ensure that the potential of the light-shielding electrode 131 is stable, and in the detection process, once the potential of the light-shielding electrode 131 fluctuates, it can be determined that a conductive foreign object, or a conductive particle 600, exists between the light-shielding electrode 131 and the pixel electrode 133, so that the light-shielding electrode 131 and the pixel electrode 131 are short-circuited.
As shown in fig. 7, an embodiment of the invention further discloses a method for inspecting an array substrate, and referring to fig. 1 to 6, the method is used for inspecting any one of the array substrates 100, and the array substrate 100 can refer to the above contents. The detection method comprises the following steps:
in step S101, the first terminal 520 is electrically connected to the light-shielding electrode 131.
In the embodiment of the present invention, the first terminal 520 and the light-shielding electrode 131 are connected through a connection line 1314, so that the detection is performed through the first terminal 520.
In some embodiments, it is possible to detect whether the pixel electrode 133 and the light shielding electrode 131 in the array substrate 100 are short-circuited through the first terminal 520, specifically, whether the sub-area pixel electrode 1332 and the light shielding electrode 131 in the pixel electrode 133 are short-circuited, and whether the main pixel electrode 1331 and the light shielding electrode 131 in the pixel electrode 133 are short-circuited.
In step S102, it is detected whether there is a malfunction in the non-display area 102.
Specifically, in the embodiment of the present invention, whether the potential of the first terminal 520 in the non-display area 102 varies or not is detected, or whether the potential of the light-shielding electrode 131 varies or fluctuates is detected through the first terminal 520, and whether a short circuit occurs between the light-shielding electrode 131 and the pixel electrode 133 due to the conductive particles 600 is further determined according to the potential of the light-shielding electrode 131, so as to conveniently determine whether the non-display area varies or not.
In step S103, if a change in the non-display region 102 is detected, it is determined that the conductive particles 600 are present between the light-shielding electrode 131 and the pixel electrode 133, as shown in fig. 5. If no difference is detected in the non-display region, it is determined that no conductive particles exist between the light-shielding electrode 131 and the pixel electrode 133, as shown in fig. 4.
Specifically, when the array substrate 100 is detected through the first terminal 520, the light-shielding electrode 131 is first connected to the first terminal 520, and then the potential of the light-shielding electrode 131 in the array substrate 100 is detected, and if the potential of the light-shielding electrode 131 does not change or fluctuate but maintains a stable potential, it indicates that the light-shielding electrode 131 is not short-circuited and there are no conductive particles between the light-shielding electrode 131 and the pixel electrode 133, which can be seen from fig. 4. Thus, the array substrate 100 does not need to be repaired.
In the detecting process, if the potential of the light-shielding electrode 131 is detected to be varied through the first terminal 520, that is, the potential of the light-shielding electrode 131 fluctuates, it indicates that there is the conductive particle 600 between the light-shielding electrode 131 and the pixel electrode 133, and a short circuit occurs due to the conductive particle 600, as shown in fig. 5. Therefore, the maintainer can remove the conductive particles 600 according to the detection result of the detector 500, so that the array substrate 100 can be repaired, the yield of products can be improved, and the display effect of the display can be improved.
In the method for detecting the array substrate, the array substrate can refer to the above contents, and details are not repeated herein.
It will be understood by those skilled in the art that the structure of the display panel 10 shown in fig. 1 and 2 does not constitute a limitation of the display panel 10. The display panel 10 may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used and will not be described further herein.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the present invention is not limited to the disclosed embodiments, and that various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention.
Claims (10)
1. The array substrate is characterized by comprising a display area and a non-display area, wherein the non-display area is provided with a first terminal and a second terminal, and the display area comprises a shading electrode arranged opposite to a data line and a common electrode line arranged along the edge of a pixel electrode;
the shading electrode comprises a connecting part, a vertical part and a horizontal part, wherein the vertical part and the horizontal part are connected with each other, and the vertical part is connected with the connecting part;
the shading electrode is electrically communicated with the first terminal through a connecting wire, and the first terminal is used for detecting whether the potential of the shading electrode fluctuates or not so as to judge whether conductive particles exist between the shading electrode and the pixel electrode or not;
the public electrode wire is electrically communicated with the second terminal, and the shading electrode is electrically insulated from the public electrode wire.
2. The array substrate of claim 1, wherein the light-shielding electrode and the pixel electrode are disposed on the same layer, and the common electrode line and the gate line are disposed on the same layer.
3. The array substrate of claim 1, wherein the light-shielding electrode is a mesh and comprises a plurality of parallel horizontal portions and a plurality of parallel vertical portions, and each horizontal portion is connected to the vertical portions on two adjacent sides.
4. The array substrate of claim 3, wherein a plurality of the vertical portions are connected to the first terminal.
5. The array substrate of claim 3, wherein the light shielding electrode further comprises a connecting portion, wherein a plurality of the vertical portions are connected to the connecting portion, and the connecting portion is connected to the first terminal.
6. The array substrate of claim 5, wherein the connecting portion and the plurality of horizontal portions are parallel to each other, and the connecting portion and the plurality of vertical portions are perpendicular to each other.
7. The array substrate of claim 3, wherein the array substrate comprises: the light-shielding electrode is arranged on the data lines and shields the data lines.
8. The array substrate of claim 7, wherein the vertical portion is disposed on the data line to shield the data line, and the horizontal portion is disposed between the gate line and the pixel unit.
9. The method for inspecting the array substrate according to any one of claims 1 to 8, wherein the array substrate comprises: the display device comprises a display area and a non-display area, wherein the non-display area is provided with a first terminal and a second terminal, the display area comprises a shading electrode arranged opposite to a data line and a public electrode line arranged along the edge of a pixel electrode, the shading electrode comprises a connecting part, a vertical part and a horizontal part, the vertical part and the horizontal part are mutually connected, the vertical part is connected with the connecting part, the public electrode line is electrically communicated with the second terminal, and the shading electrode is electrically insulated from the public electrode line;
the detection method comprises the following steps: electrically connecting the shading electrode with the first terminal through a connecting wire;
detecting whether or not the potential of the light-shielding electrode fluctuates through the first terminal;
if the first terminal detects that the potential of the light-shielding electrode fluctuates, it is determined that there are conductive particles between the light-shielding electrode and the pixel electrode.
10. A display panel, comprising a color filter substrate and an array substrate according to any one of claims 1 to 8, wherein the color filter substrate is disposed opposite to the array substrate, a common electrode is disposed on the color filter substrate, and a voltage applied to the first terminal is the same as a voltage applied to the common electrode.
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| CN109166506A (en) * | 2018-10-31 | 2019-01-08 | 苏州旷视智能科技有限公司 | The detection method of display panel based on high-accuracy machine vision |
| KR102567714B1 (en) * | 2019-03-07 | 2023-08-17 | 삼성디스플레이 주식회사 | Display device |
| CN110070800A (en) * | 2019-04-04 | 2019-07-30 | 深圳市华星光电技术有限公司 | Pixel electrode structure and pixel electrode production method |
| CN110082970A (en) * | 2019-04-09 | 2019-08-02 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and display device |
| TWI696991B (en) * | 2019-05-21 | 2020-06-21 | 友達光電股份有限公司 | Display device and driving method thereof |
| CN111045261B (en) * | 2019-12-05 | 2021-07-27 | 苏州华星光电技术有限公司 | Display panel |
| CN111025697B (en) * | 2019-12-16 | 2021-06-01 | 武汉华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN113552750B (en) * | 2021-07-12 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113671749B (en) * | 2021-09-07 | 2023-03-31 | 深圳市华星光电半导体显示技术有限公司 | Method for reducing afterimage in image |
| CN114114768B (en) * | 2021-12-07 | 2023-06-30 | 深圳市华星光电半导体显示技术有限公司 | Pixel, array substrate and display device |
| CN115268128B (en) * | 2022-08-04 | 2023-08-22 | 苏州华星光电技术有限公司 | Array substrate, display panel and defect repairing method thereof |
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