CN104849926A - On-cell touch panel and AHVA (Advanced Hyper Viewing Angle) display thereof - Google Patents
On-cell touch panel and AHVA (Advanced Hyper Viewing Angle) display thereof Download PDFInfo
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- CN104849926A CN104849926A CN201510333692.6A CN201510333692A CN104849926A CN 104849926 A CN104849926 A CN 104849926A CN 201510333692 A CN201510333692 A CN 201510333692A CN 104849926 A CN104849926 A CN 104849926A
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- electrode
- touch panel
- external hanging
- substrate
- hanging touch
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides an on-cell touch panel and an AHVA (Advanced Hyper Viewing Angle) display thereof. The on-cell touch panel comprises a touch panel and a flexible printing circuit, wherein the touch panel comprises multiple first electrodes extending horizontally and multiple second electrodes extending vertically; the flexible printing circuit comprises a fan-out area which is provided with a first electrode, an insulating layer located above the first electrode, and a second electrode located above the insulating layer. A through hole is formed through laser welding, and the first electrode and the second electrode are electrically coupled by the through hole. Compared with the prior art, the on-cell touch panel is provide with a stacked structure of the first electrode, the insulating layer and the second electrode in the fan-out area, the first electrode and the second electrode are electrically coupled by the through hole formed by laser welding, when an ITO (Indium Tin Oxide) sensor has an open-circuit fault and conductive adhesive is adopted for coating, the conductive adhesive cannot be directly fitted on the first electrode of the fan-out area, the warping phenomenon of the coated surface cannot occur and a condition that a display picture has the green phenomenon is avoided.
Description
Technical field
The present invention relates to lcd technology and touch technology, particularly relate to a kind of external hanging touch panel and AHVA (Advanced Hyper View Angle, super large visual angle high definition) display thereof.
Background technology
In the prior art, the research increasing prevalence that contact panel function is integrated with liquid crystal panel.In general, the contact panel of Vehicles Collected from Market mainly can be divided into external hanging type (on-cell) and embedded (in-cell) two kinds.For external hanging touch panel, touch screen is embedded between the colored filter substrate (color filter substrate) of liquid crystal panel and upper polaroid (upper polarizer) by it, that is, liquid crystal panel configures touch sensing.For embedded touch control panel, contact panel function is embedded in liquid crystal pixel by it, that is, embed touch-control sensing function in the inside of liquid crystal panel, panel screen can be made like this to become lighter and thin.
On the other hand, based on the liquid crystal indicator of fringe field switching technology (Fringe Field Switching, FFS), with its viewing visual angle, wide and aperture opening ratio high is subject to the favor of users.Normally, FFS liquid crystal indicator (the such as AHVA display) liquid crystal layer that mainly comprises colored filter substrate, thin-film transistor array base-plate and be arranged between two substrates.Such as, colored filter substrate comprises a glass substrate, a chromatic filter layer and upper polaroid.Wherein this chromatic filter layer is provided with Red lightscreening plate, green color filter and blue color filter successively.Array base palte comprises a subtend substrate, a pel array and lower polaroid.
When AHVA lcd technology combines with external hanging type touch technology, often utilize conducting resinl (conductive tap) to be contacted with chase by the conductive layer of rear side, make it play function of shielding thus prevent display frame greening.But, when ITO sensor failure (e.g., induction line open circuit) on contact panel, to normal shipment, then must connect together with the ITO cabling of conducting resinl by off position.Although conducting resinl can repair the open circuit situation of induction line, also easily produce the problem of glue face warpage, make the ITO sensor of part be in suspension (floating) state.The suspension of this ITO sensor can cause display frame greening, not only affects the shipment of product, also can reduce the performance of product.
In view of this, how to design a kind of new external hanging touch panel, to overcome above-mentioned defect of the prior art or deficiency, be the problem that person skilled is urgently to be resolved hurrily in the industry.
Summary of the invention
For the partially green problem of the display frame existing for external hanging touch panel of the prior art, that the invention provides a kind of novelty, that display frame can be avoided partially green external hanging touch panel and AHVA display thereof.
According to one aspect of the present invention, provide a kind of external hanging touch panel, comprising:
One touch screen, comprises that extend in the horizontal direction, multiple first electrode spaced apart, and vertically extend, multiple second electrode spaced apart; And
One flexible printer circuit, comprises a fanout area, and described fanout area has one first electrode, an insulation course and one second electrode; Insulation course is positioned at the top of described first electrode, and the second electrode is positioned at the top of described insulation course, and wherein, described external hanging touch panel utilizes laser bonding to offer through hole, by the first electrode described in described through hole electric property coupling and described second electrode.
An embodiment wherein, described flexible printer circuit also comprises a cabling district and a bonding land, the connecting line in described cabling district is electrically coupled to corresponding first electrode or the second electrode, the connecting line of described bonding land is electrically coupled to corresponding joint sheet, and described fanout area is between described cabling district and described bonding land.
An embodiment wherein, electrically cuts off second electrode in described cabling district and the second electrode of described bonding land by etch process.
An embodiment wherein, described external hanging touch panel also comprises a conductive adhesive layer, coat the second electrode surface of the second electrode surface of described bonding land, the region between described bonding land and described fanout area, described fanout area, all electrodes are all electrically connected.
An embodiment wherein, in described cabling district and described bonding land, described first electrode and described second electrode also comprise a metal level.
An embodiment wherein, described first electrode and described second electrode are made by tin indium oxide material.
An embodiment wherein, described external hanging touch panel is suitable for AHVA display.
According to another aspect of the present invention, provide a kind of AHVA display, comprising:
One colored filter substrate, comprising:
One first substrate;
One chromatic filter layer, is positioned at the below of described first substrate;
As the external hanging touch panel of above-mentioned one aspect of the invention, be positioned at the top of described first substrate; And
Polaroid on one, is positioned at the top of described external hanging touch panel; And
Array basal plate, comprising:
One second substrate, is oppositely arranged with described first substrate;
One pel array, is positioned at the top of described second substrate; And
Polaroid once, is positioned at the below of described second substrate.
Adopt external hanging touch panel of the present invention and AHVA display thereof, its touch screen comprises multiple first electrode extended in the horizontal direction and multiple second electrodes vertically extended, and flexible printer circuit comprises a fanout area.This fanout area has one first electrode, an insulation course and one second electrode, and wherein insulation course is positioned at the top of the first electrode, and the second electrode is positioned at the top of insulation course.This external hanging touch panel utilizes laser bonding to offer through hole, by through hole electric property coupling first electrode and the second electrode.Compared to prior art, the present invention arranges the stepped construction of the first electrode, insulation course and the second electrode in fanout area, and through hole electric coupling first electrode utilizing laser bonding to be formed and the second electrode.When the ITO sensor generation open circuit fault on contact panel and when using conducting resinl to be coated with, conducting resinl can't directly be fitted the first electrode of fanout area, thus also can not produce the problem of glue face warpage, and then avoid the bad situation of display frame greening.
Accompanying drawing explanation
Reader, after having read the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates the structural representation of a kind of external hanging touch panel of the prior art;
Fig. 2 illustrates the structural representation of the liquid crystal panel of a kind of AHVA display of the prior art;
Fig. 3 illustrate the AHVA display of Fig. 2 arrange in pairs or groups Fig. 1 external hanging touch panel after, the touch-control sensing electrode in external hanging touch panel and the cabling connection diagram of flexible printer circuit;
Fig. 4 illustrates in the flexible printer circuit of AHVA display, the first electrode of existing fanout area and the schematic diagram of the second electrode;
Fig. 5 illustrates according to one embodiment of the present invention, the first electrode of the fanout area of flexible printer circuit and the schematic diagram of the second electrode;
Fig. 6 illustrates that the fanout area of Fig. 5 adopts the view of laser bonding (laser welding) processing procedure electric property coupling first electrode and the second electrode; And
Fig. 7 illustrates the view adopting conducting resinl (conductive tap) electrically to be connected by all touch-control sensing electrodes on contact panel.
Embodiment
The technology contents disclosed to make the application is more detailed and complete, and can refer to accompanying drawing and following various specific embodiment of the present invention, mark identical in accompanying drawing represents same or analogous assembly.But those of ordinary skill in the art should be appreciated that hereinafter provided embodiment is not used for limiting the scope that contains of the present invention.In addition, accompanying drawing, only for being schematically illustrated, is not drawn according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is described in further detail.
Fig. 1 illustrates the structural representation of a kind of external hanging touch panel of the prior art.With reference to Fig. 1, as mentioned before, external hanging touch panel is embedded into by touch screen between the colored filter substrate (color filter substrate) of liquid crystal panel and upper polaroid (upper polarizer).Specifically, this liquid crystal panel comprises a colored filter substrate and array basal plate.Wherein, this colored filter substrate comprises polaroid 104 on first substrate 100, chromatic filter layer 102, external hanging touch panel 106 and.Chromatic filter layer 102 is positioned at the below of first substrate 100, and external hanging touch panel 106 is positioned at the top of first substrate 100, and upper polaroid 104 is positioned at the top of external hanging touch panel.Array base palte comprises second substrate 200, pel array 202 and once polaroid (lowerpolarizer) 204.Second substrate 200 and first substrate 100 are oppositely arranged, and pel array 202 is positioned at the top of second substrate 200, and lower polaroid 204 is positioned at the below of second substrate 200.
Fig. 2 illustrates the structural representation of the liquid crystal panel of a kind of AHVA display of the prior art.With reference to Fig. 2, the liquid crystal panel of this AHVA display comprises a colored filter substrate and a thin-film transistor array base-plate.
Colored filter substrate comprises glass substrate 300, flatness layer 302, chromatic filter layer 304, black matrix 306 and dorsal part conductive layer 308.Chromatic filter layer 304 is positioned at the below of glass substrate 300, comprises Red lightscreening plate, green color filter and blue color filter, and the intersection of two of arbitrary neighborhood optical filters is provided with black matrix 306.Flatness layer 302 is positioned at the below of chromatic filter layer 304.In addition, photoresistance sept PS is arranged between colored filter substrate and array base palte, in order to support and to maintain the distance between two substrates.
Thin-film transistor array base-plate comprises glass substrate 400, gate insulator (gate insulationlayer) 402, passivation layer (passivation layer) 404, the first metal layer 406, metallic vias 408, pixel electrode layer (pixel electrode layer) 410 and common electrode layer (common electrodelayer) 412.The first metal layer 406 is formed at the top of glass substrate 400, in order to form the grid of thin film transistor (TFT).Gate insulator 402 is formed at the top of glass substrate 400 and the grid of cover film transistor.Semiconductor layer, via after patterned process, forms source electrode and the drain electrode of thin film transistor (TFT) respectively, and drain electrode is electrically coupled to pixel electrode 410.Passivation layer 404 is positioned at the top of semiconductor layer.Photoresistance sept PS is between passivation layer 410 and flatness layer 302.
As mentioned before, when AHVA liquid crystal display collocation external hanging touch panel, often utilize conducting resinl (conductive tap) to be contacted with chase by dorsal part conductive layer (such as, tin indium oxide material) 308, make it play function of shielding thus prevent display frame greening.
Fig. 3 illustrate the AHVA display of Fig. 2 arrange in pairs or groups Fig. 1 external hanging touch panel after, the touch-control sensing electrode in external hanging touch panel and the cabling connection diagram of flexible printer circuit.Fig. 4 illustrates in the flexible printer circuit of AHVA display, the first electrode of existing fanout area and the schematic diagram of the second electrode.
With reference to Fig. 3 and Fig. 4, touch screen comprises that extend in the horizontal direction, multiple first electrode ITO1 spaced apart, and vertically extend, multiple second electrode ITO2 spaced apart.In addition, the first electrode ITO1 and the second electrode ITO2 is electrically connected to flexible printer circuit (Flexible Printed Circuit, FPC) 500 via respective cabling.Flexible printer circuit and outer peripheral areas thereof might as well be divided into bonding land S1, fanout area A and cabling district S2.The connecting line of bonding land S1 is electrically coupled to corresponding joint sheet, and the connecting line of cabling district S2 is electrically coupled to corresponding first electrode or the second electrode, and fanout area A is between cabling district S2 and bonding land S1.As shown in Figure 4, in the S1 of bonding land, the first electrode (such as, ITO1) 504 is positioned at bottom, and metal level 506 is positioned at the top of the first electrode 504, and the second electrode (such as, ITO2) 502 is positioned at the top of metal level 506.In cabling district S2, the second electrode 502 is positioned at the top of metal level 506.In the A of fanout area, the first electrode 504 and the second electrode 502 are directly fitted.
Problem brought like this is, when open circuit fault occurs the ITO electrode (such as, adjacent two ITO1 or adjacent two ITO2) on contact panel, often must connect together with the ITO cabling of conducting resinl by off position.But, owing to easily producing the phenomenon of glue face warpage when conducting resinl is fitted, make the subregion of ITO electrode be in suspension (floating) state.The suspended state of this ITO electrode can cause display frame greening, not only affects the shipment of product, also can reduce the performance of product.
In order to solve the aforementioned problems in the prior, the present invention has carried out improvement design to the fanout area of flexible printer circuit.Fig. 5 illustrates according to one embodiment of the present invention, the first electrode of the fanout area of flexible printer circuit and the schematic diagram of the second electrode.Fig. 6 illustrates that the fanout area of Fig. 5 adopts the view of laser bonding (laser welding) processing procedure electric property coupling first electrode and the second electrode.
Compared by Fig. 5 and Fig. 4, in this embodiment, the key distinction of Fig. 5 and Fig. 4 is, the first electrode 504 in the A of fanout area and the second electrode 502 also non-immediate are fitted.Specifically, this fanout area has the first electrode 504, insulation course 510 and the second electrode 502.Insulation course 510 is positioned at the top of the first electrode 504, and the second electrode 502 is positioned at the top of insulation course 510.That is, insulation course 510 electrically cuts off the first electrode 504 and the second electrode 502.To realize the electrical connection of the first electrode 504 and the second electrode 502, the present invention preferably can utilize laser bonding to offer through hole, by through hole electric property coupling first electrode 504 and the second electrode 502, as shown in Figure 6.In addition, conducting resinl 508 also can coat the upper surface of second electrode 502 of bonding land S1 in advance.
Fig. 7 illustrates the view adopting conducting resinl (conductive tap) electrically to be connected by all touch-control sensing electrodes on contact panel.
With reference to Fig. 7, in this embodiment, first electrically cut off second electrode 502 of cabling district S2 and second electrode 502 of bonding land S1 by etch process (etching), that is, the second electrode 502 in fanout area is formed temporary transient isolated island.Then use laser bonding processing procedure to offer through hole, this through hole is through middle insulation course 510 thus realize the first electrode 504 and the second electrode 502 is electrically connected, as shown in T-shaped second electrode 502 of the fanout area of Fig. 7.Finally conductive adhesive layer 508 is coated the second electrode 502 surface of the surface of second electrode 502 of bonding land S1, region between bonding land S1 and fanout area, fanout area, thus all electrodes are all electrically connected.When these electrodes contact with the chase of display as dorsal part conductive layer, function of shielding just can be played to prevent display frame greening.
Adopt external hanging touch panel of the present invention and AHVA display thereof, its touch screen comprises multiple first electrode extended in the horizontal direction and multiple second electrodes vertically extended, and flexible printer circuit comprises a fanout area.This fanout area has one first electrode, an insulation course and one second electrode, and wherein insulation course is positioned at the top of the first electrode, and the second electrode is positioned at the top of insulation course.This external hanging touch panel utilizes laser bonding to offer through hole, by through hole electric property coupling first electrode and the second electrode.Compared to prior art, the present invention arranges the stepped construction of the first electrode, insulation course and the second electrode in fanout area, and through hole electric coupling first electrode utilizing laser bonding to be formed and the second electrode.When the ITO sensor generation open circuit fault on contact panel and when using conducting resinl to be coated with, conducting resinl can't directly be fitted the first electrode of fanout area, thus also can not produce the problem of glue face warpage, and then avoid the bad situation of display frame greening.
Above, the specific embodiment of the present invention is described with reference to the accompanying drawings.But those skilled in the art can understand, when without departing from the spirit and scope of the present invention, various change and replacement can also be done to the specific embodiment of the present invention.These change and replace and all drop in claims of the present invention limited range.
Claims (8)
1. external hanging type (on-cell) contact panel, is characterized in that, described external hanging touch panel comprises:
One touch screen, comprises that extend in the horizontal direction, multiple first electrode spaced apart, and vertically extend, multiple second electrode spaced apart; And
One flexible printer circuit, comprises a fanout area, and described fanout area has:
One first electrode;
One insulation course, is positioned at the top of described first electrode; And
One second electrode, is positioned at the top of described insulation course,
Wherein, described external hanging touch panel utilizes laser bonding to offer through hole, by the first electrode described in described through hole electric property coupling and described second electrode.
2. external hanging touch panel according to claim 1, it is characterized in that, described flexible printer circuit also comprises a cabling district and a bonding land, the connecting line in described cabling district is electrically coupled to corresponding first electrode or the second electrode, the connecting line of described bonding land is electrically coupled to corresponding joint sheet, and described fanout area is between described cabling district and described bonding land.
3. external hanging touch panel according to claim 2, is characterized in that, electrically cuts off second electrode in described cabling district and the second electrode of described bonding land by etch process.
4. external hanging touch panel according to claim 3, it is characterized in that, described external hanging touch panel also comprises a conductive adhesive layer, coat the second electrode surface of the second electrode surface of described bonding land, the region between described bonding land and described fanout area, described fanout area, all electrodes are all electrically connected.
5. external hanging touch panel according to claim 2, is characterized in that, in described cabling district and described bonding land, described first electrode and described second electrode also comprise a metal level.
6. external hanging touch panel according to claim 1, is characterized in that, described first electrode and described second electrode are made by tin indium oxide material.
7. external hanging touch panel according to claim 1, is characterized in that, described external hanging touch panel is suitable for a super large visual angle high definition (Advanced Hyper View Angle, AHVA) display.
8. super large visual angle high definition (Advanced Hyper View Angle, an AHVA) display, it is characterized in that, described AHVA display comprises:
One colored filter substrate, comprising:
One first substrate;
One chromatic filter layer, is positioned at the below of described first substrate;
External hanging touch panel as claimed in claim 1, is positioned at the top of described first substrate; And
Polaroid on one, is positioned at the top of described external hanging touch panel; And
Array basal plate, comprising:
One second substrate, is oppositely arranged with described first substrate;
One pel array, is positioned at the top of described second substrate; And
Polaroid once, is positioned at the below of described second substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333692.6A CN104849926A (en) | 2015-06-16 | 2015-06-16 | On-cell touch panel and AHVA (Advanced Hyper Viewing Angle) display thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333692.6A CN104849926A (en) | 2015-06-16 | 2015-06-16 | On-cell touch panel and AHVA (Advanced Hyper Viewing Angle) display thereof |
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| Publication Number | Publication Date |
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| CN104849926A true CN104849926A (en) | 2015-08-19 |
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| CN201510333692.6A Pending CN104849926A (en) | 2015-06-16 | 2015-06-16 | On-cell touch panel and AHVA (Advanced Hyper Viewing Angle) display thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11864326B2 (en) | 2020-06-28 | 2024-01-02 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Substrate, maintenance method and display device |
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2015
- 2015-06-16 CN CN201510333692.6A patent/CN104849926A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11864326B2 (en) | 2020-06-28 | 2024-01-02 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Substrate, maintenance method and display device |
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