A touch screen with two pieces of ITO glass

Abstract

The utility model discloses a kind of touch screen with two ITO glasses, it includes sequentially stacked from bottom to top lower glass, liquid optical adhesive and upper glass, the lower surface of upper glass is provided with TX wiring, the upper surface of lower glass is provided with RX wiring and silver paste wiring, silver paste wiring is provided with silver paste block, silver paste block is electrically connected with silver paste wiring and TX wiring, lower glass is longer than upper glass and outwardly protruding and formed with step, the upper surface of lower glass located at step is bound with FPC.Upper glass only needs to make ITO pattern of TX wiring, without silk-screen silver paste wiring, lower glass is made ITO pattern of RX wiring and silk-screen silver paste wiring, then TX wiring of upper glass and silver paste wiring of lower glass are formed electrically connected by silk-screen silver paste block, the conduction of upper glass and lower glass can be realized, it does not need to make bridge structure, so that product is simple, improve the reliability of product, it can also use less mask for making circuit pattern, so that mold cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of touch technology, and more specifically, to a touch screen with two ITO glass panels. Background Technology

[0002] Touchscreens require high reliability in some usage environments. Although some GG structure touchscreens can meet the high reliability requirements, the touch function layer in the traditional structure requires a bridging structure, which makes the product process complex and the product reliability not high. In addition, multiple photomasks are required to make circuit patterns, which increases the mold cost and the product cost. Utility Model Content

[0003] The technical problem this invention aims to solve is how to improve the reliability of touch screens and reduce mold costs, thereby reducing product manufacturing costs.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] To solve the above-mentioned technical problems, this utility model provides a touch screen with two ITO glass pieces, which includes a lower glass, a liquid optical adhesive, and an upper glass stacked sequentially from bottom to top. The lower surface of the upper glass is provided with TX traces, and the upper surface of the lower glass is provided with RX traces and silver paste traces. A silver paste block is provided on the silver paste traces, and the silver paste block is electrically connected to the silver paste traces and TX traces. The lower glass is longer than the upper glass and extends outward to form a step. An FPC is bonded to the upper surface of the lower glass located at the step.

[0006] In a preferred embodiment of the touch screen with two ITO glass panels provided by this utility model, the thickness of the liquid optical adhesive is 0.15mm-0.30mm.

[0007] In a preferred embodiment of the touchscreen with two ITO glass panels provided by this utility model, the liquid optical adhesive is OCA optical adhesive or OCR optical adhesive.

[0008] In a preferred embodiment of the touch screen with two ITO glass panels provided by this utility model, a traceability label and a shielding paper are disposed on the surface of the FPC, and the shielding paper covers the surface of the FPC and the traceability label.

[0009] As a preferred embodiment of the touch screen with two ITO glass panels provided by this utility model, the shielding paper includes a shielding layer, an adhesive layer and a non-adhesive layer stacked sequentially from top to bottom. The size and position of the non-adhesive layer correspond to the size and position of the traceability label paper. The non-adhesive layer covers the traceability label paper, and the adhesive layer covers the surface of the FPC.

[0010] In a preferred embodiment of the touch screen with two ITO glass panels provided by this utility model, the thickness of the non-adhesive layer is 0.03mm-0.06mm.

[0011] In a preferred embodiment of the touchscreen with two ITO glass panels provided by this utility model, the edge of the non-adhesive layer extends 1.5 mm to 3 mm beyond the edge of the traceability label paper.

[0012] As a preferred embodiment of the touch screen with two ITO glass panels provided by this utility model, the non-adhesive layer and the shielding layer have different appearance colors.

[0013] In a preferred embodiment of the touchscreen with two ITO glass panels provided by this utility model, the non-adhesive layer is white and the shielding layer is black.

[0014] In a preferred embodiment of the touchscreen with two ITO glass panels provided by this utility model, the cross-sectional area of ​​the shielding paper is larger than the cross-sectional area of ​​the traceability label paper.

[0015] This utility model has the following beneficial effects:

[0016] The entire lower surface of the upper glass is plated with ITO, and then the ITO pattern of the TX trace is made through a photolithography process. The entire upper surface of the lower glass is plated with ITO, and then the ITO pattern of the RX trace is made through a photolithography process. Then, silver paste traces are made through screen printing. Generally, large pieces of glass are used to make the RX traces and silver paste traces, which can improve production efficiency. FPC can connect the touch function to the motherboard, which can be done by single-sided bonding.

[0017] In this structure, the TX and RX traces of the touchscreen functional layer are respectively fabricated on the lower surface of the upper glass and the upper surface of the lower glass. The upper glass only needs to have the ITO pattern of the TX traces made, without screen printing the silver paste traces. The lower glass has the ITO pattern of the RX traces made and the silver paste traces screened. Then, the TX traces of the upper glass and the silver paste traces of the lower glass are electrically connected by the screen-printed silver paste blocks, which can realize the conduction between the upper and lower glass. It does not require the construction of a bridging structure, which simplifies the product and improves the reliability of the product. It can also use fewer photomasks to make circuit patterns, which reduces mold costs and thus reduces the product manufacturing cost. Attached Figure Description

[0018] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a touch screen with two ITO glass panels provided by this utility model.

[0020] Figure 2 This is a schematic diagram of a stacked structure of a touch screen with two ITO glass panels provided by this utility model.

[0021] Figure 3 for Figure 1 A schematic diagram of the upper and middle glass structure.

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the middle and lower glass.

[0023] Figure 5 This is a schematic diagram of the structure of Example 2.

[0024] Figure 6 for Figure 5 A bottom view.

[0025] Figure 7 for Figure 5 A schematic diagram of the stacked structure.

[0026] Explanation of icon numbers:

[0027] Bottom glass 1; Liquid optical adhesive 2; Top glass 3; TX trace 31; RX trace 11; Silver paste trace 12; Silver paste block 4; FPC 5;

[0028] Traceability label paper 6; shielding paper 7; shielding layer 71; adhesive layer 72; non-adhesive layer 73. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] This utility model provides a touch screen with two ITO glass pieces, which includes a lower glass, a liquid optical adhesive, and an upper glass stacked sequentially from bottom to top. The lower surface of the upper glass is provided with TX traces, and the upper surface of the lower glass is provided with RX traces and silver paste traces. A silver paste block is provided on the silver paste traces, and the silver paste block is electrically connected to the silver paste traces and TX traces. The lower glass is longer than the upper glass and extends outward to form a step. An FPC is bonded to the upper surface of the lower glass located at the step.

[0033] The entire lower surface of the upper glass is plated with ITO, and then the ITO pattern of the TX trace is made through a photolithography process. The entire upper surface of the lower glass is plated with ITO, and then the ITO pattern of the RX trace is made through a photolithography process. Then, silver paste traces are made through screen printing. Generally, large pieces of glass are used to make the RX traces and silver paste traces, which can improve production efficiency. FPC can connect the touch function to the motherboard, which can be done by single-sided bonding.

[0034] In this structure, the TX and RX traces of the touchscreen functional layer are respectively fabricated on the lower surface of the upper glass and the upper surface of the lower glass. The upper glass only needs to have the ITO pattern of the TX traces made, without screen printing the silver paste traces. The lower glass has the ITO pattern of the RX traces made and the silver paste traces screened. Then, the TX traces of the upper glass and the silver paste traces of the lower glass are electrically connected by the screen-printed silver paste blocks, which can realize the conduction between the upper and lower glass. It does not require the construction of a bridging structure, which simplifies the product and improves the reliability of the product. It can also use fewer photomasks to make circuit patterns, which reduces mold costs and thus reduces the product manufacturing cost.

[0035] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. The present invention will be described in detail below with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] Example 1, please refer to Figures 1 to 4 This invention provides a touch screen with two ITO glass panels, comprising a lower glass 1, a liquid optical adhesive 2, and an upper glass 3 stacked sequentially from bottom to top. The lower surface of the upper glass 3 is provided with a TX trace 31, and the upper surface of the lower glass 1 is provided with an RX trace 11 and a silver paste trace 12. A silver paste block 4 is provided on the silver paste trace 12, and the silver paste block 4 is electrically connected to the silver paste trace 12 and the TX trace 31. The lower glass 1 is longer than the upper glass 3 and extends outward to form a step. An FPC 5 is bonded to the upper surface of the lower glass 1 located at the step.

[0037] The entire lower surface of the upper glass 3 is plated with ITO, and then the ITO pattern of the TX trace 31 is made through a photolithography process. The entire upper surface of the lower glass 1 is plated with ITO, and then the ITO pattern of the RX trace 11 is made through a photolithography process. Then, the silver paste trace 12 is made by screen printing. Generally, a large piece of glass is used to make the RX trace 11 and the silver paste trace 12, which can improve production efficiency. The FPC5 can connect the touch function to the motherboard, which can be done by single-sided bonding.

[0038] In this structure, the TX trace 31 and RX trace 11 of the touch screen functional layer are respectively made on the lower surface of the upper glass 3 and the upper surface of the lower glass 1. The upper glass 3 only needs to make the ITO pattern of the TX trace 31, without screen printing the silver paste trace 12. The lower glass 1 makes the ITO pattern of the RX trace 11 and screen prints the silver paste trace 12. Then, the TX trace 31 of the upper glass 3 and the silver paste trace 12 of the lower glass 1 are electrically connected by the screen-printed silver paste block 4, so that the upper glass 3 and the lower glass 1 can be connected. It does not require the construction of a bridging structure, which simplifies the product and improves the reliability of the product. It can also use less photomask to make the circuit pattern, which reduces the mold cost and thus reduces the product manufacturing cost.

[0039] Furthermore, the thickness of the liquid optical adhesive 2 is 0.15mm-0.30mm, and the liquid optical adhesive 2 is an OCA optical adhesive or an OCR optical adhesive.

[0040] Example 2, please refer to Figures 5 to 7 As a further optimization of Embodiment 1, in this embodiment, the surface of the FPC5 is provided with a traceability label 6 and a shielding paper 7. The traceability label 6 is pasted on the surface of the FPC5, and the shielding paper 7 covers the surface of the FPC5 and the traceability label 6. The shielding paper 7 includes a shielding layer 71, an adhesive layer 72, and a non-adhesive layer 73, which are stacked sequentially from top to bottom. The size and position of the non-adhesive layer 73 correspond to the size and position of the traceability label 6. The non-adhesive layer 73 covers the traceability label 6, and the adhesive layer 72 covers the surface of the FPC5. Since the bottom layer of the shielding paper 7 is provided with a non-adhesive layer 73, and the non-adhesive layer 73 covers the traceability label 6, while the adhesive layer 72 covers other areas on the surface of the FPC5, by adding a non-adhesive layer 73 in the corresponding area of ​​the traceability label 6, the adhesiveness of the shielding paper 7 is isolated from the traceability label 6. This avoids the problem of the traceability code on the traceability label 6 being easily peeled off due to the adhesiveness of the shielding paper 7 during rework, thus improving the traceability of product accessories.

[0041] Furthermore, the thickness of the non-adhesive layer 73 is 0.03mm-0.06mm. The edge of the non-adhesive layer 73 extends 1.5mm to 3mm beyond the edge of the traceability label 6 to ensure that, even with application deviations, the non-adhesive layer 73 still completely covers the traceability label 6. Additionally, the non-adhesive layer 73 and the shielding layer 71 have different appearance colors so that it is easy to visually distinguish whether there are any omissions in the non-adhesive layer 73, ensuring product consistency. More preferably, the non-adhesive layer 73 is white and the shielding layer 71 is black; using white and black allows for better differentiation between the non-adhesive layer 73 and the shielding layer 71.

[0042] Furthermore, the cross-sectional area of ​​the shielding paper 7 is larger than that of the traceability label paper 6. In this embodiment, the cross-sectional area of ​​the shielding paper 7 is 1.5 times that of the traceability label paper 6. The shielding paper 7 completely covers the traceability label paper 6 to further protect the traceability label paper 6.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A touchscreen with two ITO glass panels, characterized in that, It includes a bottom glass, a liquid optical adhesive, and a top glass stacked sequentially from bottom to top. The bottom surface of the top glass is provided with TX traces, and the top surface of the bottom glass is provided with RX traces and silver paste traces. A silver paste block is provided on the silver paste traces, and the silver paste block is electrically connected to the silver paste traces and TX traces. The bottom glass is longer than the top glass and extends outward to form a step. An FPC is bonded to the top surface of the bottom glass located at the step.

2. The touchscreen with two ITO glass panels according to claim 1, characterized in that, The thickness of the liquid optical adhesive is 0.15mm-0.30mm.

3. The touchscreen with two ITO glass panels according to claim 1, characterized in that, The liquid optical adhesive is either OCA optical adhesive or OCR optical adhesive.

4. The touchscreen with two ITO glass panels according to claim 1, characterized in that, The FPC has a traceability label and a shielding paper on its surface, with the shielding paper covering the surface of the FPC and the traceability label.

5. The touchscreen with two ITO glass panels according to claim 4, characterized in that, The shielding paper includes a shielding layer, an adhesive layer, and a non-adhesive layer stacked sequentially from top to bottom. The size and position of the non-adhesive layer correspond to the size and position of the traceability label paper. The non-adhesive layer covers the traceability label paper, and the adhesive layer covers the surface of the FPC.

6. The touchscreen with two ITO glass panels according to claim 5, characterized in that, The thickness of the non-adhesive layer is 0.03mm-0.06mm.

7. The touchscreen with two ITO glass panels according to claim 5, characterized in that, The edge of the non-adhesive layer extends 1.5 mm to 3 mm beyond the edge of the traceability label paper.

8. The touchscreen with two ITO glass panels according to claim 5, characterized in that, The non-adhesive layer and the shielding layer have different appearance colors.

9. The touchscreen with two ITO glass panels according to claim 8, characterized in that, The non-adhesive layer is white, and the shielding layer is black.

10. The touchscreen with two ITO glass panels according to claim 4, characterized in that, The cross-sectional area of ​​the shielding paper is larger than the cross-sectional area of ​​the traceability label paper.

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