Color-changeable high-reliability touch screen sensor structure

Abstract

The utility model provides a color-changeable high-reliability touch screen sensor structure, which comprises a touch screen cover plate, a touch layer, an optical adhesive layer, an electrochromic film layer and an FPC (Flexible Printed Circuit), one more electrochromic film layer is fixed through the optical adhesive layer, the electrochromic film layer is bound with the FPC through a power-on pattern circuit and is powered on and powered off through a circuit on the FPC, and the color-changeable high-reliability touch screen sensor structure is arranged on the touch screen cover plate. The electrochromic film becomes colorless and transparent after being powered on and becomes semi-transparent black when being powered off, so that the integrated black effect of the touch screen is enhanced through the electrochromic film layer, a layer of grounding pattern circuit is printed on the electrochromic film layer in a silk-screen mode, a whole pattern is formed, a shielding cover can be formed in space, and the electrostatic shielding effect is achieved; damage and interference caused by static electricity can be isolated, and the reliability of the touch layer is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screens, in particular to the technical field of electrochromic touch screens. Background Art

[0002] As a human-computer interaction device, touch screens have been popularized in smart terminal products such as smartphones, tablet computers, in-vehicle mobile terminals, and commercial information query systems. Touch screen products and technologies have made rapid progress, and the scale of the industry has continued to expand, but market competition has also become increasingly fierce. With the rapid development of touch screen technology, the market requires not only sensitive touch and narrow borders for mid-to-high-end touch screens, but also the need to maximize customer visual comfort. From market feedback, when the screen is in standby mode, the entire screen is pure black, making the entire product more integrated, more upscale, and more atmospheric. In other words, all-in-one black electronic products are more popular in the market. Various display terminals generally have a circle of black border areas outside the display area. When the screen is off, there is often a color difference between the display area and the border area in the off state, which affects the all-in-one black effect. Electrochromic film is one of the all-in-one black technologies. In addition, the presence of static electricity also affects the display effect and touch sensitivity of the touch screen, which may cause damage to the line short circuit. It is necessary to further improve the spatial shielding capability and the reliability of the touch layer. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art, provide a touch screen with enhanced integrated black effect, and enhance the reliability of the touch layer of the touch screen.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A color-changing high-reliability touch screen sensor structure comprises a touch screen cover plate, a touch layer, an optical adhesive layer, an electrochromic film layer and an FPC, wherein the touch screen cover plate is bonded to a first surface of the touch layer, a second surface of the touch layer is relatively bonded to the electrochromic film layer via the optical adhesive layer, a grounding pattern circuit and a power-on pattern circuit are arranged on the electrochromic film layer, and the touch layer, the grounding pattern circuit and the power-on pattern circuit are connected to the FPC.

[0006] Furthermore, an FPC binding position is provided on one side of the touch layer close to the optical adhesive layer, and is bound and connected to the FPC.

[0007] Furthermore, one end of the grounding pattern circuit and the power-on pattern circuit are bonded to the FPC by heat pressing.

[0008] Preferably, the FPC connected to the touch layer and the FPC connected to the electrochromic film layer are the same FPC, a recess is provided at the binding portion of the FPC, the left side of the recess is connected to the touch layer, and the right side of the recess is connected to the grounding pattern circuit and the energized pattern circuit.

[0009] Furthermore, the optical adhesive layer is an OCA adhesive layer, which is fully bonded to the touch layer.

[0010] Furthermore, the electrochromic film layer is made of inorganic electrochromic material and / or organic electrochromic material, and is fully bonded to the optical adhesive layer.

[0011] Furthermore, the grounding pattern circuit and the power-on pattern circuit are screen-printed on the electrochromic film layer.

[0012] Furthermore, the grounding pattern circuit and the power-on pattern circuit are made of transparent metal materials.

[0013] Furthermore, the grounding pattern circuit and the power-on pattern circuit are bow-shaped patterns.

[0014] Preferably, the energized pattern circuit is wrapped within the grounded pattern circuit surface, and the two are not in contact with each other.

[0015] Beneficial effects of the utility model:

[0016] The utility model fixes an additional electrochromic film layer on the touch layer of the touch screen through an optical adhesive layer. The electrochromic film layer is bound to the FPC and is powered on and off through the circuit on the FPC. When powered on, the electrochromic film becomes colorless and transparent, and when powered off, it becomes semi-transparent black, thereby achieving the integrated black effect of the touch screen enhanced by the electrochromic film layer. A grounding pattern circuit is silk-screened on the electrochromic film layer to form the entire pattern, which can form a shielding cover in space, has an electrostatic shielding effect, can isolate the damage and interference caused by static electricity, and greatly improve the reliability of the touch layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is the front view of the touch screen;

[0019] Figure 2 It is a side view of the touch screen;

[0020] Figure 3 Schematic diagram of the electrochromic principle. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "first surface", "second surface", "left side", "right side" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method.

[0023] See also Figures 1 to 3 The color-changing high-reliability touch screen sensor structure of the first embodiment includes a touch screen cover plate 10, a touch layer 20, an optical adhesive layer 201, an electrochromic film layer 202 and an FPC 30. The touch screen cover plate 10 is bonded to the first surface of the touch layer 20, and the second surface of the touch layer 20 is relatively bonded to the electrochromic film layer 202 through the optical adhesive layer 201. A grounding pattern circuit 2021 and a power-on pattern circuit 2022 are arranged on the electrochromic film layer 202. The touch layer 20 is connected to the grounding pattern circuit 2021 and the power-on pattern circuit 2022 by the FPC 30.

[0024] The working principle of this embodiment: When the touch screen is in use, the electrochromic film layer 202 is connected to the FPC 30 and the touch layer 20 through the energized graphic circuit 2022. In this way, when the screen is off, the electrochromic film layer 202 is powered off, the permeability is reduced, and the color becomes black, which can enhance the black effect of the touch screen when the screen is off. When working, the electrochromic film layer 202 is powered on, the permeability is increased, and the color becomes transparent, which does not affect the normal display and light emission. The electrochromic film layer is also equipped with a grounding graphic circuit 2021, which plays an electronic shielding role, improves the reliability of the touch layer 20, and avoids electrostatic damage and interference.

[0025] In this embodiment, a FPC binding position is provided on one side of the touch layer 20 close to the optical adhesive layer 201, and is bound and connected to the FPC 30. One end of the grounding pattern circuit 2021 and the power-on pattern circuit 2022 are heat-pressed and bound to the FPC 30.

[0026] In this way, the electrochromic film layer 202 is connected to the circuit on the FPC30 through the grounding pattern circuit 2021 and the power-on pattern circuit 2022, and the FPC30 is connected to the touch layer 20, so that the electrochromic film layer 202 can change color by turning the power-on pattern circuit 2022 on and off. In the power-off state (i.e., the sleep state), it appears semi-transparent black, thereby enhancing the integrated black effect of the electronic product. When powered on (i.e., the working state), the film itself presents a colorless and transparent property, which does not affect the display effect of the electronic product or has a very small impact. The grounding treatment is performed through the grounding pattern circuit 2021, so that electronic shielding is achieved and reliability is improved.

[0027] In this embodiment, the FPC 30 connected to the touch layer 202 and the FPC 30 connected to the electrochromic film layer 202 are the same FPC, and a concave portion 31 of the FPC 30 is provided, the left side of the concave portion is connected to the touch layer 202, and the right side of the concave portion is connected to the grounding pattern circuit 2021 and the power-on pattern circuit 2022. In this preferred embodiment, the hot pressing sol will not overflow and adhere, it is not easy to cause a circuit short circuit, and the cost is low.

[0028] It is understandable that in other embodiments, the FPC connected to the touch layer 20 and the FPC connected to the electrochromic film layer 202 may also be different FPCs, and the line connection on the FPC can realize the connection between the electrochromic film layer 202 and the touch layer 20, realize the color change of the electrochromic film layer 202 and form a shielding cover.

[0029] In this embodiment, the optical adhesive layer 201 is an OCA adhesive layer, which is fully bonded to the touch layer 20 . Furthermore, the electrochromic film layer is made of an inorganic electrochromic material and / or an organic electrochromic material, which is fully bonded to the optical adhesive layer 201 .

[0030] In this way, the touch layer 20 is fixed with an electrochromic film layer 202 having the same shape and size as the touch layer through the optical adhesive layer 201. Because a grounding pattern circuit 2021 is arranged on the electrochromic film layer 202, a shielding cover can be formed in space, which has an electrostatic shielding effect, can isolate the damage and interference caused by static electricity, and greatly improve the reliability of the touch layer 20.

[0031] It should be noted that the optical adhesive layer 201 between the touch layer 20 and the electrochromic film layer 202 is preferably but not limited to being bonded by OCA adhesive.

[0032] See also Figure 3 In the second embodiment, the grounding pattern circuit 2021 and the power-on pattern circuit 2022 are screen-printed on the electrochromic film layer using the transparent metal material ITO.

[0033] In this embodiment, the grounding pattern circuit 2021 and the power-on pattern circuit 2022 are bow-shaped patterns. The bow-shaped structure is compact and simple, and evenly distributed, so that the current can flow smoothly along the pattern, so that the touch screen display effect is uniform when the power is turned on and off, and the grounding pattern circuit 2021 forms a pattern structure, which can better form a shielding cover in space, isolate the damage and interference caused by static electricity, and greatly improve the reliability of the touch layer 20.

[0034] It should be noted that the graphic circuits 2021 and 2022 may also be circuits in the form of diamond, spiral, or tic-tac-toe graphics.

[0035] In this embodiment, the power-on pattern line 2022 is wrapped in the ground pattern line 2021, and the two do not touch each other. In this way, the power-on pattern line 2022, which is close to each other, can avoid interference caused by the generated pulse signal, and such a pattern design makes the two lines have no intersection points, reducing the node capacitance generated by the routing, and further improving reliability.

[0036] The utility model fixes an additional electrochromic film layer on the touch layer of the touch screen through an optical adhesive layer. The electrochromic film layer is bound to the FPC through an energized graphic circuit, and the power is turned on and off through the circuit on the FPC. After power is turned on, the electrochromic film becomes colorless and transparent, and appears semi-transparent black when the power is turned off, thereby achieving the integrated black effect of the touch screen enhanced by the electrochromic film layer. A grounding graphic circuit is silk-screened on the electrochromic film layer to form the entire graphic surface, which can form a shielding cover in space, has an electrostatic shielding effect, can isolate the damage and interference caused by static electricity, and greatly improve the reliability of the touch layer.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A color-changing high-reliability touch screen sensor structure, comprising a touch screen cover, a touch layer, an optical adhesive layer, an electrochromic film layer and an FPC, characterized in that: The touch screen cover is bonded to the first surface of the touch layer, the second surface of the touch layer is relatively bonded to the electrochromic film layer through the optical adhesive layer, a grounding pattern circuit and a power-on pattern circuit are arranged on the electrochromic film layer, and the touch layer, the grounding pattern circuit and the power-on pattern circuit are connected to the FPC.

2. The color-variable high-reliability touch screen sensor structure according to claim 1, characterized in that: A FPC binding position is provided on one side of the touch layer close to the optical adhesive layer, and is bound and connected to the FPC.

3. The color-changing high-reliability touch screen sensor structure according to claim 1, characterized in that: One end of the grounding pattern circuit and the power-on pattern circuit are heat-pressed and bonded to the FPC.

4. The color-changing high-reliability touch screen sensor structure according to claim 1 is characterized in that: The FPC connected to the touch layer and the FPC connected to the electrochromic film layer are the same FPC, and a recess is provided at the binding portion of the FPC. The left side of the recess is connected to the touch layer, and the right side of the recess is connected to the grounding pattern circuit and the power-on pattern circuit.

5. The color-changing high-reliability touch screen sensor structure according to claim 1, characterized in that: The optical adhesive layer is an OCA adhesive layer, which is fully bonded to the touch layer.

6. The color-variable high-reliability touch screen sensor structure according to claim 1, characterized in that: The electrochromic film layer is made of inorganic electrochromic material and / or organic electrochromic material and is fully bonded to the optical adhesive layer.

7. The color-changing high-reliability touch screen sensor structure according to claim 1, characterized in that: The grounding pattern circuit and the power-on pattern circuit are silk-screened on the electrochromic film layer.

8. The color-changing high-reliability touch screen sensor structure according to claim 1, characterized in that: The grounding pattern circuit and the power-on pattern circuit are made of transparent metal material.

9. The color-changing high-reliability touch screen sensor structure according to claim 1, characterized in that: The grounding pattern circuit and the power-on pattern circuit are bow-shaped patterns.

10. The color-changing high-reliability touch screen sensor structure according to claim 9, characterized in that: The energized pattern circuit is wrapped in the grounded pattern circuit surface, and the two are not in contact.

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