An anti-interference capacitive touch screen functional chip

Abstract

The present invention discloses an anti-interference capacitive touch screen functional sheet, comprising an upper transparent conductive layer and a lower transparent conductive layer, the conductive surfaces of the two conductive layers are stacked and bonded relative to each other through a layer of transparent optical adhesive; the upper transparent conductive layer and the lower transparent conductive layer both comprise a functional area and a wiring area, the wiring area is located around the functional area, the wiring area is covered with an insulating layer, a metal wiring is printed on the insulating layer, the metal wiring is connected to the transparent electrode in the functional area, wherein the ground wire in the metal wiring is connected to the original electrode layer of the lower layer of the insulating layer through at least two vias arranged on the insulating layer. The front and back sides of all the circuits inside the capacitive touch screen functional sheet of the present invention are shielded by conductors, so that the internal circuits of the touch screen have anti-interference ability.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screens, and in particular to an anti-interference capacitive touch screen functional sheet. Background Art

[0002] Because the electromagnetic environment used by capacitive screen customers is relatively complex, capacitive touch screens are easily interfered by the spatial radiation of themselves or other devices, which seriously affects the user experience. If the electromagnetic interference problem cannot be solved well, it will bring the following disadvantages:

[0003] (1) It affects the operating experience and easily causes touch drift and false touches;

[0004] (2) Individual differences are large, and the consistency of promotion is poor;

[0005] (3) Affect the normal use of the whole product.

[0006] Therefore, it is of great significance to develop an anti-interference capacitive touch screen functional chip and a capacitive touch screen. Summary of the invention

[0007] The purpose of the present invention is to provide an anti-interference capacitive touch screen functional sheet.

[0008] The technical solution adopted by the present invention is:

[0009] An anti-interference capacitive touch screen functional sheet comprises an upper transparent conductive layer and a lower transparent conductive layer, wherein the upper transparent conductive layer is composed of a first substrate and a first transparent electrode layer arranged on the first substrate, and the lower transparent conductive layer is composed of a second substrate and a second transparent electrode layer arranged on the second substrate, and the conductive surfaces of the first substrate and the second substrate are stacked and bonded with each other through a layer of transparent optical adhesive;

[0010] The upper transparent conductive layer and the lower transparent conductive layer both include a functional area and a wiring area. The wiring area is located around the functional area. The functional area is etched with an electrode pattern. The wiring area retains the original electrode layer. The wiring area is covered with an insulating layer. The insulating layer is printed with metal wiring. The metal wiring is connected to the transparent electrode in the functional area, wherein the ground wire in the metal wiring is connected to the original electrode layer under the insulating layer through at least two vias arranged on the insulating layer.

[0011] Furthermore, the thickness of the transparent optical adhesive layer is 50um to 100um.

[0012] Furthermore, the first substrate and the second substrate are both made of transparent organic polymer materials.

[0013] Furthermore, the transparent organic polymer material is PET, PC or PMMAPET.

[0014] Furthermore, the first transparent electrode layer and the second transparent conductive layer are both made of ITO, IZO, nanosilver or nanocarbon tube materials.

[0015] Furthermore, the first transparent electrode layer and the second transparent conductive layer are both made of ITO material.

[0016] Beneficial effects of the present invention: Compared with the prior art, the present invention covers the functional area with an insulating layer around it, and prints the metal wiring on the insulating layer, and the ITO under the insulating layer is completely retained and connected to the ground wire in the metal wiring through vias. The combination of the two layers of electrodes is adjusted from the original face-to-back to face-to-face, so that all the metal wiring inside the functional sheet of the capacitive touch screen of the present invention is shielded by the ITO conductor on both the front and back sides, so that the internal circuit of the touch screen has anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a schematic diagram showing the structure of a capacitive touch screen functional sheet according to a first embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A partial enlarged view of . DETAILED DESCRIPTION

[0019] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0020] Example 1

[0021] See also Figure 1 and Figure 2 This embodiment provides an anti-interference capacitive touch screen functional sheet, including an upper transparent conductive layer and a lower transparent conductive layer, the upper transparent conductive layer is composed of a first substrate 8 and a first transparent electrode layer 7 arranged on the first substrate, the lower transparent conductive layer is composed of a second substrate 1 and a second transparent electrode layer 2 arranged on the second substrate, the first substrate 8 and the second substrate 1 conductive surface are opposite to each other and are laminated and bonded by a layer of transparent optical adhesive 5;

[0022] The upper transparent conductive layer includes an upper functional area and an upper wiring area 32. The upper wiring area 32 is located around the upper functional area. An electrode pattern is etched on the upper functional area. The upper wiring area 32 retains the original electrode layer. The upper wiring area 32 is covered with an upper insulating layer 42. The upper insulating layer 42 is printed with an upper metal wiring 62. The upper metal wiring 62 is connected to the transparent electrode in the functional area, and the ground wire in the upper metal wiring 62 is connected to the original electrode layer under the upper insulating layer through two vias arranged on the upper insulating layer 42.

[0023] The lower transparent conductive layer includes a lower functional area and a lower wiring area 31. The lower wiring area 31 is located around the lower functional area. An electrode pattern is etched on the lower functional area. The lower wiring area 31 retains the original electrode layer. The lower wiring area 31 is covered with a lower insulating layer 41. The lower insulating layer 41 is printed with a lower metal wiring 61. The lower metal wiring 61 is connected to the transparent electrode in the upper functional area, wherein the ground wire in the lower metal wiring 61 is connected to the original electrode layer of the lower insulating layer through two vias 91 arranged on the lower insulating layer 41.

[0024] In this embodiment, the thickness of the transparent optical adhesive is 50 um; the first substrate and the second substrate are both made of PET organic polymer material; the first transparent electrode layer and the second transparent conductive layer are both made of ITO material.

[0025] When manufacturing the capacitive touch screen functional sheet of Example 1, in addition to etching out the electrode patterns required for the visual area, the upper transparent conductive layer and the lower transparent conductive layer also need to preserve the entire surface of the ITO around the functional area, instead of etching it all off like an ordinary touch screen. After etching, an insulating layer is printed around the functional area, so that the insulating layer covers the ITO layer around the functional area. Then, the metal wiring of the touch screen is printed on this insulating layer, and two through holes are set in the insulating layer to connect the metal wiring to the ITO in the wiring area. Through structural adjustments, all the lines inside the touch screen are shielded by conductors on both the front and back sides, so that the internal lines of the touch screen have anti-interference capabilities.

[0026] Example 2

[0027] The structure of Example 2 is basically the same as that of Example 1, except that the thickness of the transparent optical adhesive is 100 um; the first substrate and the second substrate are both made of PC organic polymer material; and the first transparent electrode layer and the second transparent conductive layer are both made of nanosilver material.

[0028] Example 3

[0029] The structure of Example 3 is basically the same as that of Example 1, except that the thickness of the transparent optical adhesive is 50 um; the first substrate and the second substrate are both made of PMMAPET organic polymer material; and the first transparent electrode layer and the second transparent conductive layer are both made of nano-carbon tube material.

[0030] The manufacturing methods of Example 2 and Example 3 are the same as that of Example 1.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-interference capacitive touch screen functional sheet, comprising an upper transparent conductive layer and a lower transparent conductive layer, wherein the upper transparent conductive layer is composed of a first substrate and a first transparent electrode layer disposed on the first substrate, and the lower transparent conductive layer is composed of a second substrate and a second transparent electrode layer disposed on the second substrate, wherein the conductive surfaces of the first substrate and the second substrate are stacked and bonded together by a layer of transparent optical adhesive, characterized in that: The upper transparent conductive layer and the lower transparent conductive layer both include a functional area and a wiring area, the wiring area is located around the functional area, the functional area is etched with an electrode pattern, the wiring area retains the original electrode layer, the wiring area is covered with an insulating layer, the insulating layer is printed with metal wiring, the metal wiring is connected to the transparent electrode in the functional area, wherein the ground wire in the metal wiring is connected to the original electrode layer under the insulating layer through at least two vias arranged on the insulating layer; The first substrate and the second substrate are both made of transparent organic polymer materials; The first transparent electrode layer and the second transparent conductive layer are both made of ITO, IZO, nanosilver or nanocarbon tube materials.

2. The anti-interference capacitive touch screen functional sheet according to claim 1, characterized in that: The thickness of the transparent optical adhesive is 50um to 100um.

3. The anti-interference capacitive touch screen functional sheet according to claim 1, characterized in that: The transparent organic polymer material is PET, PC or PMMAPET.

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