TW201804300A - Touch panel and touch display screen - Google Patents

Abstract

A touch panel includes a substrate, a first conductive layer and a second conductive layer on the substrate. The first conductive layer includes a plurality of first sensing lines configured to send touch signals and a plurality of first dummy lines coupled to the first sensing lines. The first sensing lines intersect to form a mesh. Each first dummy line defines at least one breaking point. Every two first sensing lines defines a cross point coupled to two dummy lines. Any connecting line of two breaking point of the two dummy lines coupled to the cross point has a vertical distance of more than 100 [mu]m from the cross point. A touch display screen is also provided. The touch panel can reduce moire effect.

Description

Touch panel and touch display

The invention relates to a touch panel and a touch display screen including the touch panel.

The touch display is an inductive device that can receive input signals such as touch. It is a very attractive new information interaction device. The development of touch screen technology has aroused widespread concern in the information media community at home and abroad, and has become a rising high-tech industry in the optoelectronic industry.

The touch electrode layer is a vital component of a touch display screen. At present, the touch electrode layer of a touch display screen is mainly formed by ITO (indium tin oxide) or a mesh metal wire. However, ITO as a touch electrode layer not only has high requirements on processes and equipment, but also wastes a large amount of ITO materials in the manufacturing process, and generates a large amount of industrial waste liquid containing heavy metals. To improve the above situation, an alternative way is to use a mesh metal wire as the touch electrode layer. However, as the touch electrode layer, the mesh metal wire is prone to produce the Moire Effect, which causes a water ripple abnormality on the display screen.

In view of this, it is necessary to provide a touch panel that effectively solves the above problems.

A touch panel includes a substrate, a first electrode layer and a second electrode layer disposed on one surface of the substrate, the first electrode layer includes a plurality of first main touch electrode lines for sending a touch signal, and A first dummy line connected to the plurality of first main touch electrode lines, the second electrode layer including a plurality of second main touch electrode lines for receiving a touch signal, and the plurality of first main touch electrodes The control electrode lines cross each other to form a mesh structure. The first dummy line is provided with a plurality of first interruption points. Each of the two first main touch electrode lines crossing each other forms a first node, and part of the first The nodes are respectively connected to two first dummy lines, and a line connecting any point of the two first dummy lines close to the two first interruption points of the first node has a perpendicular to the first node Distance, the vertical distance is greater than 100 microns.

A touch panel includes a substrate, a first electrode layer and a second electrode layer disposed on a surface of the substrate, the first electrode layer includes a plurality of first main touch electrode lines for sending a touch signal, The second electrode layer includes a plurality of second main touch electrode lines for receiving a touch signal, and a second dummy line connected to the plurality of second main touch electrode lines. The control electrode lines cross each other to form a mesh structure. The second dummy line is provided with a plurality of second interruption points. Each of the two second main touch electrode lines crossing each other forms a second node, and a part of the second The nodes are respectively connected to two second dummy lines, and a line connecting any point of the two second dummy lines close to the two second interruption points of the second node is perpendicular to the second node Distance, the vertical distance is greater than 100 microns.

The invention also provides a touch display screen using the touch panel.

Compared with the prior art, the touch panel and the touch display screen provided by the present invention can effectively reduce the generation of the Moire effect, thereby enhancing the visual effects of the touch panel and the touch display screen. In addition, it can also effectively prevent the parasitic equivalent capacitance between the main touch electrode line and the dummy line, thereby making the test normal.

FIG. 1 is a schematic diagram of a touch display screen of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the II-II cutting line in FIG. 1.

FIG. 3 is a schematic perspective view of the touch panel in FIG. 2.

FIG. 4 is a schematic cross-sectional view taken along the IV-IV cutting line in FIG. 3.

FIG. 5 is a schematic top view of the first electrode layer in FIG. 4.

FIG. 6 is an enlarged schematic view of a VI section in FIG. 5.

FIG. 7 is a schematic top view of the second electrode layer in FIG. 4.

FIG. 8 is an enlarged schematic view of part VIII in FIG. 7.

FIG. 9 is a schematic side view of the intersection of the projection of the second main touch electrode line on the first electrode layer and the first dummy line in FIG. 7.

FIG. 10 is a schematic partial cross-sectional view where the projection of the first main touch electrode line on the second electrode layer and the second dummy line in FIG. 5 intersect.

Please refer to FIG. 1 and FIG. 2 together. A specific embodiment of the present invention provides a touch display screen 100. The touch display screen 100 includes a touch panel 200 and a display panel 300. The touch panel 200 is attached to the display panel 300. In this embodiment, the touch panel 200 includes a capacitive touch structure formed by a metal mesh. The display panel 300 may be a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel, a quantum dot display panel, or a plasma (Plasma). Common display panels such as display panels.

Please refer to FIG. 3 and FIG. 4 together. In this embodiment, the touch panel 200 includes a cover plate 210, a touch film 220, and a gel 230. The touch film 220 is adhered to a side surface of the cover plate 210 through the glue 230. In this embodiment, the colloid 230 is an optical clear adhesive (OCA). The cover plate 210 is made of transparent material, such as transparent glass or transparent plastic.

The touch film 220 includes a substrate 240, a first electrode layer 250 and a second electrode layer 260. The first electrode layer 250 is formed on the first surface 241 of the substrate 240 near the cover plate 210. The second electrode layer 260 is formed on a second surface 243 of the substrate 240 away from the cover plate 260, and the second surface 243 is opposite to the first surface.

In this embodiment, the first electrode layer 250 serves as a touch signal transmitting layer of the touch panel 200, and the second electrode layer 260 serves as a touch signal receiving layer of the touch panel 200. The first electrode layer 250 and the second electrode layer 260 are insulated from each other.

Referring to FIG. 5, the first electrode layer 250 includes a plurality of first main touch electrode lines 251 and a plurality of first dummy lines 253. The first main touch electrode line 251 is used to send a touch signal. The first dummy line 253 is not used as an electrode line, and is used to reduce the Moire effect of the touch panel 200. Each of the first dummy lines 253 is formed with at least one first interruption point 254. The first interruption point 254 divides each first dummy line 253 into at least two parts separated from each other. The first dummy line 253 is connected to the first main touch electrode line 251. In this embodiment, each first dummy line 253 is connected to a first main touch electrode line 251.

In this embodiment, the first main touch electrode line 251 and the first dummy line 253 are made of the same material, and are both conductive metals, such as copper. It can be understood that, in other embodiments, the materials of the first dummy line 253 and the first main touch electrode line 251 may be different.

In this embodiment, the first main touch electrode line 251 and the first dummy line 253 are both straight lines. In this embodiment, the plurality of first main touch electrode lines 251 cross each other to form a mesh-shaped diamond structure, and the mesh-shaped diamond structure is arranged in a vertical row, and each adjacent two vertical rows are arranged The first dummy line 253 is disposed between the mesh-shaped diamond structures. In this way, the plurality of first main touch electrode lines 251 of the mesh-shaped diamond structure arranged in each vertical row constitute one electrode, and each adjacent two electrodes are separated from each other by the first dummy line 253. .

It can be understood that, in other embodiments, the plurality of first main touch electrode lines 251 cross each other to form other shapes. It can be understood that, in other embodiments, the first main touch electrode line 251 may also be a curved line or an irregular line.

In this embodiment, the first main touch electrode line 251 and the first dummy line 253 can be formed at the same time by the same process step, and specifically, a conductive metal layer is deposited on the surface of the substrate 240 first, Then, the first main touch electrode line 251 and the first dummy line 253 are formed by removing a part of the conductive metal using an exposure development etching process. The plurality of first interruption points 254 are formed in an exposure development etching process.

Please refer to FIG. 5, each of the two first main touch electrode lines 251 crossing each other forms a first node 255. In this embodiment, a rhombus structure formed by crossing four first main touch electrode lines 251 has four first nodes 255, of which two opposite first nodes 255 and two first dummy lines 253 are respectively Are connected, and the other two opposite first nodes 255 are respectively connected to the two first main touch electrode lines 251. That is, part of the first node 255 is connected to two first dummy lines 253, respectively, and any two points on the two first dummy lines 253 that are close to the two first interruption points 254 of the first node 255 connected to them A vertical distance between the line and the first node 255 is greater than 100 microns. The arbitrary point is located on the first dummy line 253. As shown in FIG. 6, the line L1 on the two first dummy lines 253 near the center point of the two first interruption points 254 of the first node 255 connected to the first dummy line 253 is perpendicular to the first node 255. Distance D1. The distance D1 is greater than 100 microns. As shown in FIG. 6, the shortest line L2 between the two first interruption points 254 near the first node 255 connected to the two first dummy lines 253 has a vertical distance D2 from the first node 255. . The distance D2 is greater than 100 microns. It can be understood that there are multiple ways of connecting the arbitrary points of the two first interruption points 254, which are not limited to the two types shown in FIG. 6, and are not repeated here.

Referring to FIG. 7, the second electrode layer 260 includes a plurality of second main touch electrode lines 261 and a plurality of second dummy lines 263. The second main touch electrode line 261 is used to receive a touch signal. The second dummy line 263 is connected to the second main touch electrode line 261. The second dummy line 263 is used to reduce the Moire effect of the touch panel 200. Each of the second dummy lines 263 defines at least one second interruption point 264. The second interruption point 264 divides each second dummy line 263 into at least two parts separated from each other. In this embodiment, each second dummy line 263 is connected to a second main touch electrode line 261.

In this embodiment, the materials of the second main touch electrode line 261 and the second dummy line 263 are the same, and are both conductive metals, such as copper. It can be understood that the materials of the second dummy line 263 and the first main touch electrode line 261 may also be different.

In this embodiment, the plurality of second main touch electrode lines 261 are all straight lines. The plurality of second main touch electrode lines 261 cross each other to form a mesh-shaped diamond structure, and the mesh-shaped diamond structure is arranged in a horizontal row, and every adjacent two horizontal rows of the mesh-shaped diamond structure are arranged. The second dummy line 263 is provided therebetween. In this way, each of the plurality of second main touch electrode lines 261 of the horizontally arranged rhombus structure constitutes an electrode, and each adjacent two electrodes are separated from each other by a first dummy line 253. .

It can be understood that, in other embodiments, the plurality of second main touch electrode lines 261 cross each other to form other shapes. It can be understood that, in other embodiments, the second main touch electrode line 261 may also be a curved line or an irregular line.

In this embodiment, the second main touch electrode line 261 and the second dummy line 263 may be formed at the same time by the same process step. Specifically, firstly, a conductive metal layer is deposited on the surface of the substrate 240. Then, a portion of the conductive metal is removed by using an exposure development etching process to form the second main touch electrode line 261 and the second dummy line 263. The plurality of second interruption points 264 are formed in an exposure development etching process.

Please refer to FIG. 7, each of the two second main touch electrode lines 261 crossing each other forms a second node 265. In this embodiment, a rhombus structure formed by crossing the four second main touch electrode lines 261 has four second nodes 265, and two of the opposite second nodes 265 are respectively connected with two second dummy lines 263. Are connected, and the other two opposite second nodes 265 are respectively connected to the two second main touch electrode lines 261. That is, part of the second node 265 is respectively connected to the two second dummy lines 263, and any two points on the two second dummy lines 263 near the two second interruption points 264 of the second node 265 connected thereto A vertical distance between the connecting line and the second node 265 is greater than 100 microns. The arbitrary point is located on the second dummy line 263. As shown in FIG. 8, the line L3 of the two second dummy lines 263 near the center points of the two second interruption points 264 of the second node 265 connected to the second dummy line 263 and the second node 265 have a Vertical distance D3. The distance D3 is greater than 100 microns. As shown in FIG. 8, the shortest line L4 between the two second interruption points 254 on the two second dummy lines 253 near the second node 255 connected to the second dummy line 253 has a vertical distance D4 from the second node 255. . The distance D4 is greater than 100 microns. It can be understood that there are multiple ways of connecting the arbitrary points of the two second interruption points 254, which are not limited to the two types shown in FIG. 8 and will not be repeated here.

Because the first electrode layer 250 is provided with the first dummy line 253 and the second electrode layer 260 is provided with the second dummy line 263, the generation of Moire effect can be effectively reduced, thereby enhancing the Visual effects of the touch panel 200 and the touch display screen 100. Because the main touch electrode line and the dummy line are both thin, the interruption point of the dummy line is more prone to short-circuit communication, so that a parasitic equivalent capacitance is formed between the main touch electrode line and the dummy line, which causes a test abnormality. According to the present invention, by setting the vertical distance between the connection point formed by the intersection of the main touch electrode line and any point on the two interruption points of the dummy line to a specific size (greater than 100 microns), the main touch electrode can be effectively avoided The line and the dummy line form a parasitic equivalent capacitance, which makes the test normal.

In this embodiment, the projection of the first main touch electrode line 251 on the second electrode layer 260 does not completely overlap the second main touch electrode line 261.

In the second embodiment, the projection of the first main touch electrode line 251 on the second electrode layer 260 intersects the second dummy line 263. The projection of the second main touch electrode line 261 on the first electrode layer 250 intersects the first dummy line 253.

Referring to FIG. 9, in a second embodiment, a first dummy line 253 where a projection of the second main touch electrode line 261 on the first electrode layer 250 intersects with the first dummy line 253 is provided. The first interruption point 254. The distance W1 between the two first dummy lines 253 at both ends of the first interruption point 254 is not less than 1.5 times the diameter (or line width) of the second main touch electrode line 261, and the distance W1 Not more than 5 times the diameter of the second main touch electrode line 261. Preferably, the distance W1 is equal to twice the diameter of the second main touch electrode line 261.

Referring to FIG. 10, in a second embodiment, a second dummy line 263 where a projection of the first main touch electrode line 251 on the second electrode layer 260 intersects with the second dummy line 263 is provided. The second interruption point 264. The distance W3 between the two second dummy lines 263 at both ends of the second interruption point 264 is not less than 1.5 times the diameter (or line width) of the first main touch electrode line 251, and the distance W3 Not more than 5 times the diameter of the first main touch electrode line 251. Preferably, the distance W3 is equal to twice the diameter of the first main touch electrode line 251.

Because the first dummy line 253 and the second dummy line 263 are respectively provided with a first break point 254 and a second break point 264, and the distances W1 and W3 are limited to a reasonable range, the second main touch The projection of the electrode line 261 on the first electrode layer 250 intersects with the first dummy line 253 and the projection of the first main touch electrode line 251 on the second electrode layer 260 is the same as the first The intersection of the two dummy lines 263 is difficult to generate a parasitic capacitance that affects the accuracy of determining the touch position, which can improve the accuracy of the touch panel 200 in determining the touch position.

It should be noted that, due to the etching process, an end of the first dummy line 253 at the first interruption point 254 and an end of the second dummy line 263 at the second interruption point 264 may be It is flat, and it can also be equidistant sawtooth, non-equidistant sawtooth or irregular shape.

100‧‧‧Touch display

200‧‧‧ touch panel

300‧‧‧ display panel

210‧‧‧ Cover

220‧‧‧ touch film

230‧‧‧ colloid

240‧‧‧ substrate

250‧‧‧first electrode layer

260‧‧‧Second electrode layer

251‧‧‧The first main touch electrode line

253‧‧‧First Dummy Line

254‧‧‧First breakpoint

261‧‧‧Second main touch electrode line

263‧‧‧Second Dummy Line

264‧‧‧Second Break Point

255‧‧‧First Node

265‧‧‧Second Node

L1, L2, L3, L4‧‧‧ connection

D1, D2, D3, D4‧‧‧ vertical distance

no

251‧‧‧The first main touch electrode line

253‧‧‧First Dummy Line

254‧‧‧First breakpoint

255‧‧‧First Node

L1, L2‧‧‧ Connect

D1, D2‧‧‧ vertical distance

Claims (10)

A touch panel includes a substrate, a first electrode layer and a second electrode layer disposed on a surface of the substrate. The first electrode layer includes a plurality of first main touch electrode lines for transmitting a touch signal, and A first dummy line connected to the plurality of first main touch electrode lines, the second electrode layer including a plurality of second main touch electrode lines for receiving a touch signal, and the plurality of first main touch electrodes The control electrode lines cross each other to form a mesh structure. Each of the first dummy lines is provided with at least one first interruption point. Each of the two first main touch electrode lines that cross each other forms a first node. The reason is that part of the first nodes are respectively connected to two first dummy lines, and the connection between any two points of the two first dummy lines close to the two first interruption points of the first node and the first A node has a vertical distance greater than 100 microns. The touch panel according to item 1 of the scope of patent application, wherein the second electrode layer further includes a plurality of second dummy lines connected to the plurality of second main touch electrode lines, and the plurality of The two main touch electrode lines cross each other to form a mesh structure. Each of the second dummy lines is provided with at least one second interruption point, and each of the two main touch electrode lines crossing each other forms a second node. Part of the second nodes are respectively connected to two second dummy lines, and the connection between any two points of the two second dummy lines close to the two second interruption points of the second node and the second The nodes have a vertical distance greater than 100 microns. The touch panel according to item 2 of the scope of patent application, wherein the plurality of first main touch electrode lines cross each other to form a mesh-shaped diamond structure, and the plurality of second main touch electrode lines form each other Reticulated rhombus structure. The touch panel according to item 2 of the scope of patent application, wherein the projection of the first main touch electrode line on the second electrode layer does not completely overlap the second main touch electrode line. The touch panel according to item 2 of the scope of patent application, wherein the material of the first main touch electrode line, the first dummy line, the second main touch electrode line, and the second dummy line is metal. A touch panel includes a substrate, a first electrode layer and a second electrode layer disposed on a surface of the substrate, the first electrode layer includes a plurality of first main touch electrode lines for sending a touch signal, The second electrode layer includes a plurality of second main touch electrode lines for receiving a touch signal and a second dummy line connected to the plurality of second main touch electrode lines. The control electrode lines cross each other to form a mesh structure, the second dummy line is provided with a plurality of second interruption points, and each of the two second main touch electrode lines crossing each other forms a second node. The improvement lies in: Part of the second node is respectively connected to two second dummy lines, and the connection between any two points on the two second dummy lines close to the two second interruption points of the second node and the second node The dots have a vertical distance greater than 100 microns. The touch panel according to item 6 of the application, wherein the projection of the first main touch electrode line on the second electrode layer does not completely overlap the second main touch electrode line. The touch panel according to item 6 of the scope of patent application, wherein the materials of the first main touch electrode line, the second main touch electrode line, and the second dummy line are all metal. The touch panel according to item 6 of the scope of patent application, wherein the plurality of first main touch electrode lines cross each other to form a mesh-shaped diamond structure, and the plurality of second main touch electrode lines form each other Reticulated rhombus structure. A touch display screen includes the touch panel according to any one of claims 1-9 and a display panel. The touch panel is attached to the display panel.