CN110209299B - Touch screen and display device thereof - Google Patents
Touch screen and display device thereof Download PDFInfo
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- CN110209299B CN110209299B CN201910406851.9A CN201910406851A CN110209299B CN 110209299 B CN110209299 B CN 110209299B CN 201910406851 A CN201910406851 A CN 201910406851A CN 110209299 B CN110209299 B CN 110209299B
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- touch screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a touch screen and a display device thereof. The touch screen comprises a substrate layer, a touch sensing layer, an insulating layer and at least one connecting bridge. And a plurality of virtual units are arranged on the touch sensing layer and used for isolating the first conductive chain and the second conductive chain so as to insulate the first conductive chain and the second conductive chain. Each dummy unit comprises a plurality of first isolation units positioned at one side of the first sensing electrode; and a plurality of second isolation units located at one side of the second sensing electrodes; the first isolation units and the second isolation units are arranged at intervals in a sawtooth shape. The invention improves the display effect of the touch screen, and can realize the adjustment of the area size and the capacitance value of the first sensing electrode and the second sensing electrode by adjusting the area size of the virtual unit.
Description
Technical Field
The invention relates to the field of display, in particular to a touch screen and a display device thereof.
Background
The touch screen has the advantages of high response speed, accurate positioning, multi-point touch support, long service life and the like, and is widely applied to various devices (such as mobile terminals). The flexible touch display is a display technology with competitive advantages in the future, and has the great advantages of foldability and rollability, so that a larger display area can be obtained without occupying a larger space, and the flexible touch display is convenient to carry.
As shown in fig. 1, which is a schematic plan view of a conventional touch screen 9, the touch screen 9 is a capacitive touch screen, and a touch area of the capacitive touch screen generally includes a first conductive chain 91 and a second conductive chain 92, where the second conductive chain 92 and the first conductive chain 91 are arranged in an insulating overlapping manner and both extend to a bonding area 93.
As shown in fig. 2, which is an enlarged schematic view of a touch unit of the touch screen planar structure shown in fig. 1, the first conductive chain 91 includes a first sensing electrode 910 that is conducted with each other through a connecting strip 911, the second conductive chain 92 is composed of a second sensing electrode 920, a connecting bridge 921 and an insulating layer 90, and a Dummy (Dummy) unit 94 for insulating the first conductive chain 91 and the second conductive chain 92 is further disposed between the first conductive chain 91 and the second conductive chain 92. The adjacent second sensing electrodes 920 in each row are connected and conducted by the connecting bridge 921, and the insulating layer 90 is disposed below the connecting bridge 921 to isolate the first sensing electrodes 910 from the second sensing electrodes 920. Dummy cells 94 are distributed between first sense electrode 910 and second sense electrode 920 and function to adjust the sense electrode capacitance. Specifically, by adjusting the area of the dummy cell 94, the value of the sensing capacitance between the driving electrode and the sensing electrode can be realized, that is, an appropriate value of the node mutual capacitance can be adjusted and matched. However, after the product is lighted up, the virtual cells 94 have certain visibility, which affects the display effect.
Therefore, there is a need for a new touch screen and a display device thereof to overcome the problems in the prior art.
Disclosure of Invention
The invention aims to provide a touch screen and a display device thereof, which can reduce the visibility of virtual units after a product is lightened, thereby improving the display effect of the touch screen.
In order to solve the above problems, the present invention provides a touch screen, which includes a substrate layer, a touch sensing layer, an insulating layer, and at least one connecting bridge. The touch sensing layer is arranged on the substrate layer and comprises at least one first conductive chain extending along a first direction and at least one second conductive chain extending along a second direction, the second conductive chains and the first conductive chains are arranged in an insulating and crossed mode, the first conductive chains comprise more than two first sensing electrodes which are arranged at intervals and connected with each other, and the second conductive chains comprise more than two second sensing electrodes which are arranged at intervals; the insulating layer is arranged on the touch sensing layer; the connecting bridge is arranged on the insulating layer and is connected with two adjacent second sensing electrodes on the second conductive chain through a through hole arranged on the insulating layer; a plurality of virtual units are arranged on the touch sensing layer and used for isolating the first conductive chain and the second conductive chain, so that the first conductive chain and the second conductive chain are insulated, and the area size of each virtual unit can be adjusted to adjust the area size and the capacitance value of the first sensing electrode and the second sensing electrode; each dummy unit comprises a plurality of first isolation units positioned at one side of the first sensing electrode; and a plurality of second isolation units located at one side of the second sensing electrodes.
Further, the first isolation units are arranged at intervals along the edge direction of the first sensing electrode, and the interval distance between two adjacent first isolation units is equal to the width of one first isolation unit; the second isolation units are arranged at intervals along the edge direction of the second sensing electrode, and the interval distance between two adjacent second isolation units is equal to the width of one second isolation unit; the first sensing electrodes and the second sensing electrodes which are adjacently arranged in the same extending direction are staggered with each other and arranged at intervals in a sawtooth shape.
Further wherein the dummy cell extends along an insulating cross direction of the first and second conductive chains; the first isolation unit and the second isolation unit are circular, rectangular, rhombic, star-shaped or bar-shaped pattern blocks.
Furthermore, the touch sensing layer further comprises gap grooves arranged in an array manner.
Furthermore, each first isolation unit and each second isolation unit are surrounded by corresponding clearance grooves.
Further, the gap grooves are uniformly distributed on the first sensing electrode and the second sensing electrode.
Furthermore, the clearance groove comprises 4 identical arc grooves which are formed by connecting the vertexes in the same direction in an equidistant rotating manner; the radius range of the circle where the arc groove is located is 0.05-1 mm; the width range of the arc groove is 5-30 um.
Further, two adjacent first sensing electrodes on the first conductive chain are connected through a connecting strip, and the connecting strip and the connecting bridge are overlapped with each other.
Further, the touch sensing layer material comprises indium tin oxide or indium zinc oxide; and/or the connecting bridge material comprises any one of indium tin oxide, indium zinc oxide, molybdenum, silver, titanium, copper, aluminum, molybdenum/aluminum/molybdenum alloy or molybdenum/copper/molybdenum alloy.
The invention also provides a display device which comprises the touch screen.
The invention has the beneficial effects that: the invention provides a touch screen and a display device thereof.A virtual unit is arranged in a zigzag interval, so that the display effect of the touch screen is improved, and the area size and the capacity value of a first sensing electrode and a second sensing electrode can be adjusted by adjusting the area size of the virtual unit; furthermore, the touch unit is dug at high frequency, so that the clearance grooves in the touch unit are regularly distributed and have high consistency, namely the X-shaped clearance grooves are arranged in an array manner and are wavy, and the display effect of the touch screen is improved.
Drawings
FIG. 1 is a schematic plan view of a conventional touch screen;
FIG. 2 is an enlarged schematic view of a touch unit of the touch screen of FIG. 1;
FIG. 3 is an enlarged schematic view of a portion of a touch screen according to the present invention, particularly showing a planar structure of a touch unit of the touch screen;
FIG. 4 is a schematic sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic enlarged view of a portion of the planar structure of the touch sensing layer in FIG. 3;
fig. 6 is an enlarged schematic view of a planar structure of the clearance groove in fig. 3.
The components in the figure are identified as follows:
1. touch screen, 100, horizontal plane;
10. a substrate layer 20, a touch sensing layer 30, an insulating layer 40, a protective layer,
60. a clearance groove 61 and a circular arc groove;
11. a first conductive chain 12, a second conductive chain 13, a bonding area,
110. a sensing electrode 111, a connecting bar 120, a second sensing electrode 121, a connecting bridge,
14. the virtual unit 141, the first isolation unit 142 and the second isolation unit.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 3 and 4, in an embodiment of the invention, the touch screen 1 includes a substrate layer 10, a touch sensing layer 20, an insulating layer 30, a connecting bridge 121, and a protective layer 40 in sequence from bottom to top. The touch sensing layer 20 is provided with at least one first conductive chain 11 extending along a first direction (e.g., x direction) and at least one second conductive chain 12 extending along a second direction (e.g., y direction), and the second conductive chain 12 and the first conductive chain 11 are arranged in an insulated and crossed manner.
Referring to fig. 3 and 4, in the present embodiment, the touch sensing layer 20 is provided with a plurality of first conductive chains 11 and a plurality of second conductive chains 12. Each of the first conductive chains 11 includes a plurality of first sensing electrodes 110 arranged at intervals and a plurality of connecting bars 111. Each connecting bar 111 is used to connect two adjacent first sensing electrodes 110; in other words, every two adjacent first sensing electrodes 110 are connected by one corresponding connection bar 111. Each second conductive chain 12 includes a plurality of second sensing electrodes 120 arranged at intervals and a plurality of connecting bridges 121, each connecting bridge 121 connects two adjacent second sensing electrodes 120 in a bridge-crossing manner, wherein each first conductive chain 11 and each second conductive chain 12 extend to a binding region of the touch screen (this structure can refer to fig. 1).
A plurality of dummy units 14 are disposed on the touch sensing layer 20 to isolate the first conductive chain 11 from the second conductive chain 12, so that the first conductive chain 11 is insulated from the second conductive chain 12. The touch screen 1 of the present invention can adjust the area size and the capacitance value of the first sensing electrode 110 and the second sensing electrode 120 by adjusting the area size of the virtual unit 14. Each dummy cell 14 includes a plurality of first isolation cells 141 and a plurality of second isolation cells 142, wherein the first isolation cells 141 are recessed and disposed apart from each other at one side of the first sensing electrode 110; the second isolation unit 142 is recessed and disposed at one side of the second sensing electrode 120.
Wherein the substrate layer 10 is a transparent substrate layer or a flexible substrate layer. The flexible substrate layer may be of COP or PET material.
As a whole, the first sensing electrode 110 and the second sensing electrode 120 are arranged in a staggered manner in the same horizontal plane 100, and more specifically, are arranged at intervals along an oblique line direction in the horizontal plane 100, as shown in fig. 3, the first isolation units 141 are arranged at intervals along the edge direction of the first sensing electrode 110, and the distance between two adjacent first isolation units 141 is equal to the width of one first isolation unit 141; the second isolation units 142 are arranged at intervals along the edge direction of the second sensing electrode 120, and the interval distance between two adjacent second isolation units 142 is equal to the width of one second isolation unit 142; the first sensing electrodes 110 and the second sensing electrodes 120 adjacently disposed in the same extending direction are staggered with each other and arranged at intervals in a zigzag manner.
The connecting bar 111 and the connecting bridge 121 are not located in the same horizontal plane, but overlap each other in a vertical direction, as shown in fig. 4, the connecting bridge 121 is located above the connecting bar 111, that is, the connecting bridge 121 spans above the connecting bar 111. The insulating layer 30 is arranged between the connecting strip 111 and the connecting bridge 121 to realize the insulation between the connecting strip 111 and the connecting bridge 121; the specific structure can be seen in fig. 3 and 4.
In this embodiment, the touch panel 1 of the present invention has a square shape, and a part of the first sensing electrode 110 and the second sensing electrode 120 has a substantially triangular shape, and the other part has a substantially rhombic shape. In detail, the first and second sensing electrodes 110 and 120 located on the edge of the square touch screen are substantially triangular, and the remaining first and second sensing electrodes 110 and 120 are substantially diamond-shaped.
As shown in fig. 3, the dummy cells 14 are disposed at the intersections (or intersections, junctions) of the adjacent first sensing electrodes 110 and second sensing electrodes 120, that is, the dummy cells 14 extend along the insulating crossing direction of the first conductive chains 11 and the second conductive chains 12. The first and second isolation cells 141 and 142 of the dummy cell 14 are circular, rectangular, diamond-shaped, star-shaped, or bar-pattern blocks.
Wherein the first sensing electrode 110 is one of a transmitting electrode and a receiving electrode, and the second sensing electrode 120 is the other of the transmitting electrode and the receiving electrode; specifically, in the present embodiment, the first sensing electrode 110 is a transmitting electrode, and the second sensing electrode 120 is a receiving electrode; in yet other embodiments, the first sensing electrode 110 may be a receiving electrode and the second sensing electrode 120 may be a transmitting electrode. The transmitting electrode is used for inputting a driving signal, the receiving electrode is used for receiving a detection signal, and when touch detection is carried out, the mutual capacitance change at the intersection of two conductive circuits or the self capacitance change of each conductive circuit is detected, namely the position of a touch point is obtained in a self capacitance or mutual capacitance mode. If a coordinate system is established in the first direction x and the second direction y, the position of the obtained touch point can be represented by the coordinate system, and conventionally, the first direction x and the second direction y are generally defined to be perpendicular to each other, so that the capacitance detection is easier and the coordinate positioning is more convenient. When the touch panel 1 has another shape (circular shape, irregular shape, or curved shape), the first direction x and the second direction y may be arranged to intersect non-perpendicularly.
As shown in fig. 5, in order to further optimize the visibility, the touch sensing layer 20 further includes a plurality of clearance grooves 60 arranged in an array, an overall structure of each clearance groove 60 is an X shape, and a local structure of each clearance groove 60 is a wave shape, which is also called an S shape. The wave shape of the clearance groove 60 prevents the human eye from observing contrast, thereby achieving the effect of optimizing visibility. Specifically, the clearance pocket 60 is an etched clearance. The overall structure of the gap groove 60 is in an X shape and is formed by connecting two S-shaped etching gaps with the middle parts perpendicular to each other.
Etching the clearance groove 60 around the dummy cell 14 can improve the visualization effect, but since the clearance groove 60 is not present in other areas, such as no clearance pocket 60 in the respective areas of first sensing electrode 110 and second sensing electrode 120, this causes the light of the gap groove and the light of the gap-free groove to contrast, which makes the difference easily observed by human eyes, and in order to further optimize the visibility, the present invention etches the regions where the first sensing electrode 110, the second sensing electrode 120 and the dummy cells 14 meet each other, by high frequency sub-drilling the first sensing electrode 110 and the second sensing electrode 120, the regular distribution of the clearance slots 60 has a high degree of uniformity, the touch screen is in a wave form formed by X shapes regularly arranged on the whole surface, so that the contrast is prevented from being observed by human eyes, and the effect of optimizing the visibility is achieved. According to the invention, the visibility effect of the touch screen is better than that of the existing touch screen through actual engineering samples, so that the display effect of the touch screen is improved.
Each first isolation unit 141 and each second isolation unit 142 are surrounded by a corresponding gap groove 60. That is, the first isolation unit 141 and the second isolation unit 142 of the dummy unit 14 are closed regions connected by the gap groove 60 to form an interval arrangement.
Meanwhile, due to the addition of the virtual unit 14, the optimal sensing capacitance value can be matched between the driving electrode and the sensing electrode by adjusting the size and the number of the virtual units 14, namely, the optimal node mutual capacitance value can be better adjusted and matched. That is, the size of the dummy cell 14 is adjusted, so that the sizes and the capacitance values of the first sensing electrode 110 and the second sensing electrode 120 can be adjusted, and the display effect of the touch screen can be further improved. The way of adjusting the capacitance size by the dummy unit 14 is specifically as follows: a touch unit of a capacitive screen is fixed, and mainly comprises a first sensing electrode 110, a second sensing electrode 120, a dummy unit 14 and a gap groove 60, wherein the size of the dummy unit 14 is changed, and the areas of the first sensing electrode 110 and the second sensing electrode 120 are reduced under the condition that the gap groove 60 is not changed. The capacitance screen is formed by a capacitor between the first sensing electrode 110 and the second sensing electrode 120, the two sensing electrodes are two electrode plates of the capacitor, and adjusting the size of the virtual unit 14 indirectly changes the areas of the two electrode plates of the capacitor, thereby playing a role in adjusting the capacitance value.
Referring to fig. 5 and 6, in the present embodiment, the clearance groove 60 includes 4 identical circular arc grooves 61, which are connected by arranging vertexes in an equidistant manner and rotating along the same direction; the radius range of the circle where the arc groove 61 is located is 0.05-1 mm. The arc groove 61 encloses the first isolation unit 141 and the second isolation unit 142, so that an etching gap can be prevented from being seen during observation, and a display effect is ensured. The width range of the arc groove 61 is 5-30um, and the narrow width of the arc groove 61 can ensure the display effect.
Further, two adjacent first sensing electrodes 110 on the first conductive chain are connected by a connecting bar 111, and the connecting bar 111 and the connecting bridge 121 overlap each other. The connecting bridge 121 is disposed to ensure that the first sensing electrodes 110 are conducted with each other and do not interfere with the second sensing electrodes 120.
The touch sensing layer 20 material includes Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).
Wherein, the material of the connection bridge 121 includes any one of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), molybdenum/aluminum/molybdenum (Mo/Al/Mo) alloy or molybdenum/copper/molybdenum (Mo/Cu/Mo) alloy. The touch sensing layer 20 and the connection bridge 121 are both made of low-resistance metal materials, so that low resistivity can be ensured.
The invention also provides a display device which comprises the touch screen.
The invention has the beneficial effects that: the invention provides a touch screen and a display device thereof.A virtual unit is arranged in a zigzag interval, so that the display effect of the touch screen is improved, and the area size and the capacity value of a first sensing electrode and a second sensing electrode can be adjusted by adjusting the area size of the virtual unit; furthermore, the touch unit is dug at high frequency, so that the clearance grooves in the touch unit are regularly distributed and have high consistency, namely the X-shaped clearance grooves are arranged in an array manner and are wavy, and the display effect of the touch screen is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A touch screen comprises
A substrate layer;
the touch sensing layer is arranged on the substrate layer and comprises at least one first conductive chain extending along a first direction and at least one second conductive chain extending along a second direction, the second conductive chain and the first conductive chain are arranged in an insulating and crossed mode, the first conductive chain comprises more than two first sensing electrodes which are arranged at intervals and connected with each other, and the second conductive chain comprises more than two second sensing electrodes which are arranged at intervals;
the insulating layer is arranged on the touch sensing layer; and
the connecting bridge is arranged on the insulating layer and is connected with two adjacent second sensing electrodes on the second conductive chain through a through hole arranged on the insulating layer;
it is characterized in that the preparation method is characterized in that,
a plurality of virtual units are arranged on the touch sensing layer and used for isolating the first conductive chain from the second conductive chain so as to enable the first conductive chain and the second conductive chain to be insulated;
wherein each dummy cell comprises
A plurality of first isolation units located at one side of the first sensing electrode; and
a plurality of second isolation units located at one side of the second sensing electrode;
the first isolation units are arranged at intervals along the edge direction of the first sensing electrode, and the interval distance between two adjacent first isolation units is equal to the width of one first isolation unit; the second isolation units are arranged at intervals along the edge direction of the second sensing electrode, and the interval distance between two adjacent second isolation units is equal to the width of one second isolation unit; the first sensing electrodes and the second sensing electrodes which are adjacently arranged in the same extending direction are staggered with each other and arranged at intervals in a sawtooth shape.
2. The touch screen of claim 1, wherein the dummy cells extend in an insulation crossing direction of the first and second conductive chains; the first isolation unit and the second isolation unit are circular, rectangular, rhombic, star-shaped or bar-shaped pattern blocks.
3. The touch screen of claim 1, wherein the touch sensing layer further comprises gap grooves arranged in an array.
4. The touch screen of claim 3, wherein each first isolation unit and each second isolation unit are surrounded by a corresponding clearance slot.
5. The touch screen of claim 3, wherein the gap trenches are evenly distributed across the first and second sense electrodes.
6. The touch screen of claim 3, wherein the clearance groove comprises 4 identical arc grooves which are formed by connecting and arranging vertexes in an equidistant rotating manner along the same direction; the radius range of the circle where the arc groove is located is 0.05-1 mm; the width range of the arc groove is 5-30 um.
7. The touch screen of claim 1, wherein two adjacent first sensing electrodes on the first conductive chain are connected by a connecting bar, and the connecting bar and the connecting bridge overlap each other.
8. The touch screen of claim 1, wherein the touch sensing layer material comprises indium tin oxide or indium zinc oxide; and/or the connecting bridge material comprises any one of indium tin oxide, indium zinc oxide, molybdenum, silver, titanium, copper, aluminum, molybdenum/aluminum/molybdenum alloy or molybdenum/copper/molybdenum alloy.
9. A display device comprising a touch screen according to any one of claims 1 to 8.
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| CN201910406851.9A CN110209299B (en) | 2019-05-15 | 2019-05-15 | Touch screen and display device thereof |
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| CN201910406851.9A CN110209299B (en) | 2019-05-15 | 2019-05-15 | Touch screen and display device thereof |
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| CN110209299B true CN110209299B (en) | 2022-06-10 |
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| CN111258462A (en) * | 2020-01-09 | 2020-06-09 | 京东方科技集团股份有限公司 | Touch panel and display device |
| CN114341786B (en) | 2020-08-06 | 2024-03-01 | 京东方科技集团股份有限公司 | Touch structure, display panel and display device |
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| CN101609384A (en) * | 2008-06-18 | 2009-12-23 | 爱普生映像元器件有限公司 | The display device of capacitance type input device and tape input function |
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| CN101609384A (en) * | 2008-06-18 | 2009-12-23 | 爱普生映像元器件有限公司 | The display device of capacitance type input device and tape input function |
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| CN110209299A (en) | 2019-09-06 |
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