CN111930263A - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
- Publication number
- CN111930263A CN111930263A CN202010960381.3A CN202010960381A CN111930263A CN 111930263 A CN111930263 A CN 111930263A CN 202010960381 A CN202010960381 A CN 202010960381A CN 111930263 A CN111930263 A CN 111930263A
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- substrate
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- layer
- display panel
- conductive adhesive
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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
Abstract
The application provides a touch display panel and a touch display device, wherein the touch display panel comprises a first substrate; the second substrate is arranged opposite to the first substrate, and a liquid crystal layer is clamped between the second substrate and the first substrate; the polaroid is positioned above the second substrate far away from the first substrate; the conductive adhesive is positioned between the polaroid and the second substrate; and the silver adhesive is positioned on the upper surface and the side surface of the second substrate, the upper surface and the side surface of the conductive adhesive and the side surface of the polaroid, and is electrically connected with the grounding circuit. This application is through inciting somebody to action the conductive adhesive layer with one of T type, wave and zigzag structure is adopted to the side that the silver colloid contacted, makes the area of contact increase of silver colloid and conductive adhesive layer to realize the efficient electrostatic discharge effect.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a touch display panel and a touch display device.
Background
Currently, touch screens are generally classified into: In-Cell (On-Cell) and In-Cell (In-Cell); the external embedded (On-Cell) is a method for embedding a touch panel between a color filter substrate and a polarizer of a display screen, namely, a touch sensor is arranged On the surface of a liquid crystal panel, and as a touch layer is added, the whole thickness of a module is thicker, and the problems of uneven color and the like easily generated during touch are solved; in-cell (in cell) is a method for embedding touch panel functions into liquid crystal pixels, and the touch function is perfectly realized while the thickness of a module is reduced, so that the in-cell (in cell) is the mainstream of the current consumption touch screen. However, the embedded touch screen is usually interfered by external ESD (electrostatic discharge) performance and TP signals during the use process, and the touch performance and the anti-static performance of the touch screen are affected in the complete machine test.
In the prior art, there are roughly two approaches to eliminating the electrostatic influence: firstly, a high-resistance film with high-resistance characteristic is used, when the high-resistance film is grounded, the high-resistance film can shield the electronic device from static electricity, but the high-resistance film is not widely popularized due to the limitation of higher production cost and process in the current use process; coating conductive silver adhesive on the edge of the polaroid above the color film substrate, and connecting the conductive silver adhesive with the zero potential of the thin film transistor of the array substrate to eliminate static accumulated on the surface of the color film substrate; however, in the process of using the touch screen, the second scheme is limited by the too small conductive capability and the too small contact area between the polarizer and the conductive silver paste, so the electrostatic discharge capability of the surface of the touch screen is weak.
Disclosure of Invention
The application provides a touch display panel and a touch display device, which are used for solving the problem that the static electricity discharge effect of the surface of a touch screen in the existing touch display panel is weak.
In order to solve the above problems, the technical solution provided by the present application is as follows:
a touch display panel, comprising: the touch display panel further comprises a display area and a non-display area adjacent to the display area:
a first substrate;
a second substrate disposed opposite to the first substrate;
a liquid crystal layer is clamped between the second substrate and the first substrate, and a grounding circuit is arranged in the non-display area of one side of the first substrate facing the second substrate;
the polaroid is positioned on one side of the second substrate, which is far away from the first substrate;
the conductive adhesive layer is positioned between the polaroid and the second substrate; and
the silver adhesive is contacted with the side surface of the polaroid, the upper surface and the side surface of the conductive adhesive layer and is electrically connected with the grounding circuit;
the side edge of the conductive adhesive layer, which is in contact with the silver adhesive, is in one of a T-shaped structure, a wavy structure and a zigzag structure.
In the touch display panel, at least two silver adhesives are located the conductive adhesive layer is close to one side of the grounding circuit, and the polaroid and the grounding circuit of the first substrate are connected through at least two silver adhesives.
In the touch display panel of the application, the material of the conductive adhesive layer includes at least one of carbon powder, graphene and a carbon tube.
In the touch-control display panel of this application, be close to one side of ground circuit, the polaroid the conducting resin layer and the second base plate is the echelonment design, the polaroid is in projection on the first base plate is located the conducting resin layer is in projection on the first base plate.
In the touch display panel, the polarizer comprises a lower protective layer, a polarizing layer and an upper protective layer which are arranged in a stacked mode; and the side surfaces of the lower protective layer, the polarizing layer and the upper protective layer are contacted with the silver adhesive at one side close to the grounding circuit.
In the touch display panel, the lower protective layer and the upper protective layer are made of cellulose triacetate, and the polarizing layer is made of polyvinyl alcohol; wherein, the surface of the upper protective layer is hardened to form a surface hardening cellulose triacetate layer.
In the touch display panel, on the side close to the grounding circuit, the touch display panel further comprises a light shielding layer which is arranged between the second substrate and the conductive adhesive layer and is positioned in the non-display area; the upper surface and the side surface of the shading layer are in contact with the silver colloid.
In the touch display panel of the application, be close to one side of ground circuit, the polaroid the conducting resin layer and the second base plate is the echelonment design.
In the touch display panel, one side of the light shielding layer, which is close to the grounding circuit, is flush with the side of the second substrate; the projection of one side of the conductive adhesive layer, which is close to the grounding circuit, on the first substrate is positioned in the projection of the shading layer on the first substrate.
The application also provides a touch display device, which comprises any one of the touch display panels.
Has the advantages that: the method comprises the steps of coating silver adhesive on the edge of the polarizer above the second substrate of the touch display panel, and electrically connecting the silver adhesive with a grounding circuit on the upper surface of the first substrate so as to eliminate static electricity accumulated on the upper surface of the second substrate; the side edge of the conductive adhesive layer, which is in contact with the silver adhesive, is in one of a T shape, a wave shape and a sawtooth shape, so that the transverse cutting contact area of the silver adhesive and the conductive adhesive layer is increased, and the polaroid, the conductive adhesive layer and the second substrate are in a step-shaped design at one side close to the grounding circuit, so that the horizontal contact area of the silver adhesive and the conductive adhesive layer is increased, and the efficient electrostatic discharge effect is realized; meanwhile, in the non-display area, a light shielding layer is arranged between the conductive adhesive layers of the second substrate and is tightly attached to the upper surface of the second substrate far away from the first substrate, so that the touch display panel is prevented from light leakage on one side of the grounding circuit.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a touch display panel in the prior art;
fig. 2 is a schematic structural diagram of a touch display panel provided in the present application;
fig. 3 is a cross-sectional view of a conductive adhesive layer and a silver paste of a touch display panel according to the present disclosure;
fig. 4 is a schematic view of a first structure of a touch display panel according to an embodiment of the present disclosure;
fig. 5 is a top view of a touch display panel according to an embodiment of the present disclosure;
fig. 6 is a cross-sectional view of a conductive adhesive layer and a silver paste of a touch display panel according to an embodiment of the present disclosure;
fig. 7 is a cross-sectional view of a polarizer of a touch display panel near a ground circuit according to an embodiment of the present disclosure;
fig. 8 is a schematic view of a second structure of a touch display panel according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.
Referring to fig. 1, a schematic structural diagram of a touch display panel in the prior art is shown.
The touch display panel comprises an array substrate 10, a color film substrate 20, a liquid crystal layer (not shown in the figure), a conductive adhesive layer 30, a polarizer 40 and a silver adhesive 50, wherein the silver adhesive 50 is electrically connected with a grounding circuit on the upper surface of the array substrate 10. In the prior art, the silver paste 50 is coated on the edge of the polarizer 40 above the color filter substrate 20, and the silver paste 50 is electrically connected to the ground circuit on the upper surface of the array substrate 10, so as to eliminate static electricity accumulated on the upper surface of the color filter substrate 20; however, the contact area between the silver paste 50 and the polarizer 40 is too small, which may cause poor conduction effect, so that the electrostatic discharge capability of the touch screen surface is weak, and the phenomena of poor contact between the polarizer 40 and the ground potential of the array substrate 10 also occur. Based on this, the application provides a touch display panel and a touch display device, can solve the drawback of complaining.
Referring to fig. 2, a schematic structural diagram of a touch display panel provided in the present application is shown.
In the present application, the touch display panel includes a display area 100 and a non-display area 200 adjacent to the display area 100.
The touch display panel further comprises a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; a liquid crystal layer (not shown) is sandwiched between the second substrate 20 and the first substrate 10, and a ground circuit (not shown) is provided in the non-display region 200 on the side of the first substrate 10 facing the second substrate 20; a polarizer 40 located above the second substrate 20 far from the first substrate 10; the conductive adhesive layer 30 is positioned between the polarizer 40 and the second substrate 10; and the silver adhesive 50 is in contact with the side surface of the polarizer 40, the upper surface and the side surface of the conductive adhesive layer 30, and is electrically connected with the ground circuit.
Referring to fig. 3, a cross-sectional view of a conductive adhesive layer and a silver paste of a touch display panel provided in the present application is shown.
In this application, conductive adhesive layer 30 with the side that silver colloid 40 contacted is T type structure, conductive adhesive layer 30 with the area of contact of silver colloid 20 does, conductive adhesive layer 30 with the curve length of silver colloid 40 contact surface with the product of conductive adhesive layer 30 with the thickness of silver colloid 40 contact surface.
It should be noted that, in the present application, the side of the conductive adhesive layer 30 contacting the silver paste 40 is a T-shaped structure for illustration only, and the side of the conductive adhesive layer 30 contacting the silver paste 40 includes, but is not limited to, a T-shaped structure, a wave-shaped structure, and a zigzag structure, which is not limited in this application.
The silver paste 50 is coated on the edge of the polarizer 40 above the second substrate 20, and the silver paste 50 is electrically connected to the ground circuit on the upper surface of the first substrate 10 to eliminate static electricity accumulated on the upper surface of the second substrate 20; the side edge of the conductive adhesive layer 30, which is in contact with the silver colloid 50, is cut into a T-shaped structure, so that the contact area between the silver colloid 50 and the conductive adhesive layer 30 is increased, and the efficient electrostatic discharge effect is realized.
The technical solution of the present application will now be described with reference to specific embodiments.
Example one
Referring to fig. 4, a first structural schematic diagram of a touch display panel provided in the embodiment of the present application is shown.
In this embodiment, the touch display panel includes a display area 100 and a non-display area 200 adjacent to the display area 100.
The touch display panel further comprises a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; a liquid crystal layer (not shown) is sandwiched between the second substrate 20 and the first substrate 10, and a ground circuit (not shown) is provided in the non-display region 200 on the side of the first substrate 10 facing the second substrate 20; a polarizer 40 located above the second substrate 20 far from the first substrate 10; the conductive adhesive layer 30 is positioned between the polarizer 40 and the second substrate 10; and the silver adhesive 50 is in contact with the side surface of the polarizer 40, the upper surface and the side surface of the conductive adhesive layer 30, and is electrically connected with the ground circuit.
In this embodiment, the first substrate 10 is an array substrate, and the second substrate 20 is a color filter substrate.
In this embodiment, on the side close to the ground circuit, the polarizer 40, the conductive adhesive layer 30 and the second substrate 20 are designed in a step shape, and the projection of the polarizer 40 on the first substrate 10 is located in the projection of the conductive adhesive layer 30 on the first substrate 10, so as to increase the horizontal contact area between the silver paste 50 and the conductive adhesive layer 30, and form a more reliable electrostatic discharge path.
Referring to fig. 5 and 6, in the present embodiment, two silver glues 50 are located on one side of the conductive adhesive layer 30 close to the ground circuit, and the polarizer 40 is connected to the ground circuit of the first substrate 10 through the two silver glues 50 to eliminate static electricity accumulated on the upper surface of the second substrate 20.
It should be noted that the two silver pastes 50 are located on one side of the conductive adhesive layer 30 close to the ground circuit for illustration only, and the number of the silver pastes 50 is not limited in this embodiment.
In the present embodiment, the material of the conductive adhesive layer 30 includes a low-reflection material, and the low-reflection material includes, but is not limited to, carbon powder, graphene, and carbon tubes. In this embodiment, a low-reflection material is added to the conductive adhesive layer 30, so as to prevent a light leakage phenomenon from occurring on one side of the grounding circuit of the touch display panel.
In this embodiment, the side of the conductive adhesive layer 30 contacting the silver paste 40 includes, but is not limited to, T-shaped, wave-shaped, and zigzag structures, which is not limited in this embodiment.
Further, in this embodiment, the side of the conductive adhesive layer 30 contacting the silver colloid 40 is a T-shaped structure, and the side of the conductive adhesive layer 30 contacting the silver colloid 50 is designed to have a T-shaped structure, so that the cross-cutting contact area between the silver colloid 50 and the conductive adhesive layer 30 is increased, and the efficient electrostatic discharge effect is realized.
Referring to fig. 7, a cross-sectional view of a polarizer of a touch display panel near a ground circuit is shown.
In this embodiment, the polarizer 40 includes a lower protection layer 41, a polarizing layer 42, and an upper protection layer 43 stacked in sequence, and is close to one side of the grounding circuit, and side surfaces of the lower protection layer 41, the polarizing layer 42, and the upper protection layer 43 are in contact with the silver paste 50.
In this embodiment, the material of the lower protective layer 41 and the upper protective layer 43 is cellulose Triacetate (TAC), and a surface hardening treatment (HC) is performed on the upper protective layer 43, so as to finally form an HC (hardening) film on the surface of the conductive layer, thereby improving the surface hardness of the polarizer 40; the polarizing layer 42 is made of polyvinyl alcohol (PVA), and the polarizing layer 42 has good transparency and polarizing property; since the polyvinyl alcohol material has good water solubility, the water resistance of the polarizing layer 42 is weak, and thus the lower protective layer 41 and the upper protective layer 43 have water resistance to protect the polarizing layer 42.
Before the polarizer 40 is attached to the conductive adhesive layer 30, a protective film is disposed on a side of the conductive adhesive layer 30 away from the first substrate 10, and the protective film completely covers the conductive adhesive layer 30, so that the leaked conductive adhesive layer 30 is exposed; when the polaroid 40 original roll is cut, controlling the cutting mode, and cutting the conductive adhesive layer 30 close to the grounding circuit according to the wave shape; wherein the cutting method includes but is not limited to grinding and laser; the cut shapes include, but are not limited to, T-shaped, wavy, and saw-tooth configurations.
Referring to fig. 8, a second structural schematic diagram of a touch display panel according to an embodiment of the present disclosure is shown.
In this embodiment, the structure of the touch display panel is similar to/the same as the first structure of the touch display panel provided in the above embodiment, and please refer to the description of the touch display panel in the above embodiment, which is not repeated herein, and the difference between the two structures is only:
in this embodiment, on a side close to the ground circuit, the touch display panel further includes a light shielding layer 60 disposed between the second substrate 20 and the conductive adhesive layer 30 and located in the non-display region 200; the upper surface and the side surface of the light shielding layer 60 are in contact with the silver paste 50.
In this embodiment, the polarizer 40, the conductive adhesive layer 30 and the second substrate 20 are designed to be stepped on a side close to the ground circuit, so as to increase a horizontal contact area between the silver paste 50 and the conductive adhesive layer 30, thereby forming a more reliable electrostatic discharge path.
In this embodiment, one side of the light shielding layer 60 close to the ground circuit is flush with the side of the second substrate 20; the projection of the side of the conductive adhesive layer 30 close to the ground circuit on the first substrate 10 is located in the projection of the light shielding layer 60 on the first substrate 10, so that the light shielding layer 60 can support the conductive adhesive layer 30 to be fixed and prevent the touch display panel from leaking light on the side of the ground circuit.
Example two
The present embodiment also provides a touch display device, which includes the touch display panel of the first embodiment.
The touch display panel has been described in detail in the first embodiment, and the description is not repeated here.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The application provides a touch display panel and a touch display device, wherein the touch display panel comprises a first substrate; the second substrate is arranged opposite to the first substrate, and a liquid crystal layer is clamped between the second substrate and the first substrate; the polaroid is positioned above the second substrate far away from the first substrate; the conductive adhesive is positioned between the polaroid and the second substrate; and the silver adhesive is positioned on the upper surface and the side surface of the second substrate, the upper surface and the side surface of the conductive adhesive and the side surface of the polaroid are contacted.
Coating the silver adhesive on the edge of the polarizer above the second substrate, and electrically connecting the silver adhesive with a grounding circuit on the upper surface of the first substrate so as to eliminate static electricity accumulated on the upper surface of the second substrate; the side edge of the conductive adhesive layer, which is in contact with the silver adhesive, is in one of a T-shaped structure, a wavy structure and a sawtooth structure, so that the cross-cut contact area of the silver adhesive and the conductive adhesive layer is increased, and the polaroid, the conductive adhesive layer and the second substrate are designed in a step shape on one side close to the grounding circuit, so that the horizontal contact area of the silver adhesive and the conductive adhesive layer is increased, and the efficient electrostatic discharge effect is realized; meanwhile, in the non-display area, a light shielding layer is arranged between the conductive adhesive layers of the second substrate and is tightly attached to the upper surface of the second substrate far away from the first substrate, so that the touch display panel is prevented from light leakage on one side of the grounding circuit.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The touch display panel and the touch display device provided by the embodiments of the present application are introduced in detail, and specific examples are applied in the description to explain the principle and the implementation of the present application, and the description of the embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A touch display panel, comprising: the touch display panel further comprises a display area and a non-display area adjacent to the display area:
a first substrate;
a second substrate disposed opposite to the first substrate;
a liquid crystal layer is clamped between the second substrate and the first substrate, and a grounding circuit is arranged in the non-display area of one side of the first substrate facing the second substrate;
the polaroid is positioned on one side of the second substrate, which is far away from the first substrate;
the conductive adhesive layer is positioned between the polaroid and the second substrate; and
the silver adhesive is contacted with the side surface of the polaroid, the upper surface and the side surface of the conductive adhesive layer and is electrically connected with the grounding circuit;
the side edge of the conductive adhesive layer, which is in contact with the silver adhesive, is in one of a T-shaped structure, a wavy structure and a zigzag structure.
2. The touch display panel of claim 1, wherein at least two silver adhesives are disposed on a side of the conductive adhesive layer close to the ground circuit, and the polarizer and the ground circuit of the first substrate are connected through at least two silver adhesives.
3. The touch display panel of claim 2, wherein the conductive adhesive layer comprises at least one of carbon powder, graphene, and carbon tubes.
4. The touch display panel of claim 1, wherein the polarizer, the conductive adhesive layer and the second substrate are designed to have a step shape near one side of the ground circuit, and a projection of the polarizer on the first substrate is located within a projection of the conductive adhesive layer on the first substrate.
5. The touch display panel of claim 4, wherein the polarizer comprises a lower protective layer, a polarizing layer, and an upper protective layer stacked together; and the side surfaces of the lower protective layer, the polarizing layer and the upper protective layer are contacted with the silver adhesive at one side close to the grounding circuit.
6. The touch display panel according to claim 5, wherein the lower protective layer and the upper protective layer are made of cellulose triacetate, and the polarizing layer is made of polyvinyl alcohol; wherein, the surface of the upper protective layer is hardened to form a surface hardening cellulose triacetate layer.
7. The touch display panel according to claim 1, wherein a light-shielding layer is disposed between the second substrate and the conductive adhesive layer and in the non-display region, near a side of the ground circuit; the upper surface and the side surface of the shading layer are in contact with the silver colloid.
8. The touch display panel of claim 7, wherein the polarizer, the conductive adhesive layer, and the second substrate are designed to have a step shape on a side close to the ground circuit.
9. The touch display panel according to claim 8, wherein a side of the light-shielding layer adjacent to the ground circuit is flush with a side of the second substrate; the projection of one side of the conductive adhesive layer, which is close to the grounding circuit, on the first substrate is positioned in the projection of the shading layer on the first substrate.
10. A touch display device comprising the touch display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960381.3A CN111930263A (en) | 2020-09-14 | 2020-09-14 | Touch display panel and touch display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960381.3A CN111930263A (en) | 2020-09-14 | 2020-09-14 | Touch display panel and touch display device |
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| CN111930263A true CN111930263A (en) | 2020-11-13 |
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| CN202010960381.3A Pending CN111930263A (en) | 2020-09-14 | 2020-09-14 | Touch display panel and touch display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113504850A (en) * | 2021-07-23 | 2021-10-15 | 深圳市华星光电半导体显示技术有限公司 | Polaroid, manufacturing method of polaroid and display panel |
| CN114185452A (en) * | 2021-12-03 | 2022-03-15 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| CN115223447A (en) * | 2022-06-27 | 2022-10-21 | 昆山国显光电有限公司 | Display panel and display device |
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| CN115223447B (en) * | 2022-06-27 | 2023-09-29 | 昆山国显光电有限公司 | Display panel and display device |
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