TWM616473U - Touch panel capable of enhancing curing of adhesive at shading place of circuit board - Google Patents

Abstract

The present invention discloses a touch panel capable of strengthening the curing of gel at the shading area of the circuit board. The touch panel comprises: a protective panel with four sides; a first reflective layer arranged on the protective panel and adjacent to the protective panel One of the sides, the first reflective layer is used to reflect an applied ultraviolet light; a circuit board, which includes a pressing part and a control part, the pressing part is disposed on the first reflective layer through an optical glue On; a sensor module, which passes through the optical glue and is attached to the first reflective layer and the pressing portion of the circuit board; the present invention reflects the ultraviolet light by the first reflective layer, so that the reflected ultraviolet light Continuously irradiating the optical glue can effectively solidify the optical glue completely and uniformly.

Description

Touch panel that can strengthen the curing of the gel at the shading part of the circuit board

A touch panel, in particular, refers to a touch panel that can strengthen the curing of the gel at the shading area of the circuit board.

Please refer to FIG. 8, when the conventional touch panel is manufactured, the circuit board 83 for control is arranged between the cover lens 81 and the touch module 84, and the pressing part of the circuit board 83 protects The cover 81 and the touch module 84 will be glued and fixed with optical glues 85 and 86 (OCR). A black ink layer 87 is laid on the protective cover 81, and a transparent ink layer 87 is further laid on the ink layer 87.光层82。 Light layer 82. In order to accelerate the curing time of the optical adhesives 85 and 86, the ultraviolet light module 90 is generally used to emit ultraviolet light to irradiate the optical adhesives 85 and 86, so that the optical adhesives 85 and 86 can be cured quickly. The pressing part of the circuit board 83, The protective cover 81 and the touch module 84 can be assembled in a relatively short time.

Generally speaking, since the touch module 84 includes a plurality of light-permeable sensing electrodes, the touch module 84 is light-permeable, and since the ultraviolet light module 90 is placed above the touch panel, The ultraviolet light module 90 emits ultraviolet light toward the touch panel, and the ultraviolet light penetrates the touch module 84 and irradiates the optical glues 85 and 86, so that the optical glues 85 and 86 can be cured in a relatively short time. However, as shown in FIG. 8, since the circuit board 83 is not light-transmissive, and there is also an optical glue 86 between the pressing part of the circuit board 83 and the protective cover 81, the pressing part of the circuit board 83 and the protective cover The optical glue 86 between 81 cannot be irradiated by ultraviolet light, so that the curing effect of the optical glue 86 between the pressing part of the circuit board 83 and the protective cover 81 is not good, resulting in insufficient structural strength and uncured optical glue 86 The external flow is attached to the protective cover 81 and affects the visual perception.

Referring to FIG. 9, in order to solve the problem that the optical glue 86 between the pressing portion of the circuit board 83 and the protective cover 81 cannot be effectively cured, there are two existing solutions. One is to use a reflective element 91 that can reflect ultraviolet light. For example, a mirror). During the curing process, the circuit board 83 is bent to expose the optical glue 86 under the circuit board 83, and ultraviolet light is reflected to the optical glue 86 under the circuit board 83 through the mirror, so that the optical glue under the circuit board 83 86 can also be cured by ultraviolet light. However, in this way, the reflective element 91 must be added in the manufacturing process, and the distance and angle between the reflective element 91 and the ultraviolet light module 90, and the distance between the reflective element 91 and the touch panel must be calculated, resulting in increased parts used Cost and time cost.

Please refer to Figure 10, another way is to install another ultraviolet light module 93 on the side of the touch panel. The optical glues 85 and 86 below can also be cured by ultraviolet light. But in the same way, in this way, another ultraviolet light module 93 must be added in the process, and the distance and angle between the ultraviolet light module 93 and the ultraviolet light module 90 must be calculated, and the ultraviolet light module 93 and the touch control module must be calculated. The distance between the panels will also increase the cost of parts used and the time cost of installing the module.

This model provides a touch panel that can strengthen the curing of the gel at the shading area of the circuit board. The first reflective layer reflects the ultraviolet light of the illumination module, so that the optical adhesive can be uniformly irradiated and cured by the ultraviolet light. In the case of increasing the number and manufacturing process, the optical glue will be uniformly solidified.

In order to achieve the above-mentioned purpose, the present invention provides a touch panel that can strengthen the curing of the gel at the shading area of the circuit board, including: A protection panel with four sides; A first reflective layer disposed on the protective panel and adjacent to one of the sides of the protective panel, and the first reflective layer is used to reflect an applied ultraviolet light; A circuit board comprising a pressing part and a control part, the pressing part is arranged on the first reflective layer through an optical glue; A sensor module is pasted on the first reflective layer and the pressing part of the circuit board through the optical glue.

The present invention uses the first reflective layer to reflect the ultraviolet light, so that the reflected ultraviolet light continuously irradiates the optical glue, which effectively solidifies the optical glue completely and uniformly, without increasing the number of light modules and increasing the manufacturing process. , Can make the optical glue uniformly cure, reduce the curing time of the optical glue, increase the process efficiency and production yield, reduce the problem of insufficient strength of the touch panel structure due to incomplete curing, and avoid the uncured optical glue The disadvantage that the external flow to the protective panel affects the user's visual experience.

In order to understand the technical features and practical effects of the present invention in detail, and to implement it in accordance with the new content, the preferred embodiments shown in the drawings are further described in detail as follows:

Please refer to Figure 1. The present invention provides a touch panel that can strengthen the curing of the gel at the shading area of the circuit board. It can cooperate with a light module to perform the curing process. The optical glue in can be quickly and uniformly cured, and the illumination module can be a light-emitting diode module or a mercury lamp module. The touch panel capable of strengthening the gel curing at the shading area of the circuit board includes: a protective panel 10, a first reflective layer 20, a light-transmitting layer 30, a circuit board 40, and a sensing module 50.

The protective panel 10 is rectangular and includes two long sides and two short sides. The protective panel 10 can be made of glass (namely, cover lens, C/L), or a protective plate made of other materials. For example, using materials such as polycarbonate (PC) or polymethylmethacrylate (PMMA), a circle of shielding layer 11 is formed around one surface of the protective panel 10, and the shielding layer 11 is not Transparent ink composition.

The first reflective layer 20 is disposed on the shielding layer 11 and is located on one of the long sides or one of the short sides of the protective panel 10 and can reflect the ultraviolet light 71. The first reflective layer 20 can be a mirror film. As shown in FIG. 1, in the first preferred embodiment of the present invention, the length of the first reflective layer 20 is similar to the width of the sensing module 50 (hereinafter referred to as a short version); or, as shown in FIG. 2, In the second preferred embodiment of the present invention, the length of the first reflective layer 20 is similar to the width of the protective panel 10 (hereinafter referred to as the long version).

The light-transmitting layer 30 is disposed on the first reflective layer 20 and covers the first reflective layer 20.

The circuit board 40 includes a pressing portion 41 and a control portion 43, the pressing portion 41 is adhered to the light-transmitting layer 30 through an optical glue 31, 33, the control portion 43 and the pressing portion 41 are integrally formed, and A number of parts that can control the sensing module 50 can be provided; when the actual curing process of the optical glue 31, 33 is carried out, the control part 43 will bend in the direction of the light module 70 to cause the light module 70 to produce The ultraviolet light 71 can illuminate the first reflective layer 20. The optical glues 31 and 33 can be optical clear resins (Optical Clear Resin, OCR, also called water glue).

The edge of one side of the sensing module 50 is set on the pressing portion 41 of the circuit board 40, and is adhered to the transparent layer 30 and the pressing portion of the circuit board 40 through the optical glue 31, 33 On the portion 41, the pressing portion 41 of the circuit board 40 is interposed between the sensing module 50 and the light-transmitting layer 30. The sensing module 50 may include a plurality of sensing electrodes, which are arranged in a matrix, and can sense the touch position of a finger or a stylus on the sensing module 50 to achieve a touch function.

Referring to FIG. 3, in the third preferred embodiment of the present invention, a second reflective layer 60 is further included. The second reflective layer 60 is disposed under the pressing portion 41 of the circuit board 40 and is located on the protection On one of the long sides or one of the short sides of the panel 10, the second reflective layer 60 is relatively located above the first reflective layer 20. The second reflective layer 60 is the same as the first reflective layer 20 and can reflect the ultraviolet light 71 reflected by the first reflective layer 20, wherein the second reflective layer 60 can be a mirror film.

Please refer to FIG. 6, when the first preferred embodiment of the present invention is irradiated by the ultraviolet light 71, the ultraviolet light 71 will first irradiate the first reflective layer 20 and be reflected by the first reflective layer 20. The ultraviolet light 71 reflected from the first reflective layer 20 penetrates the light-transmitting layer 30 and irradiates the pressing portion 41 of the circuit board 40, and the pressing portion 41 will reflect the ultraviolet light 71 again to make the ultraviolet light 71 Continue to repeat the reflection between the first reflective layer 20 and the pressing portion 41, so that the optical glue 31 between the pressing portion 41 and the light-transmitting layer 30 can be uniformly irradiated by the ultraviolet light 71, reducing The curing time of the optical glue 31 and the uniformity of curing of the optical glue 31 are improved. At the same time, since the sensing module 50 is also light-transmissive, the ultraviolet light 71 can directly penetrate the sensing module 50 to irradiate the optical glue 33 that is not shielded by the pressing portion 41, so that the pressed portion 41 Both the shielded optical glue 31 and the optical glue 33 not shielded by the pressing portion 41 can be irradiated by the ultraviolet light 71 to be cured.

The difference between the second preferred embodiment of the present invention and the first preferred embodiment is that the length of the first reflective layer 20 is similar to the width of the protective panel 10. The second preferred embodiment of the present invention can also provide reflection. The function of the ultraviolet light 71 makes the ultraviolet light 71 continue to be repeatedly reflected between the first reflective layer 20 and the pressing portion 41 to cure the optical glue 31 blocked by the pressing portion 41.

Please refer to FIG. 7, when the third preferred embodiment of the present invention is irradiated by the ultraviolet light 71, the ultraviolet light 71 will first irradiate the first reflective layer 20 and be reflected by the first reflective layer 20. The ultraviolet light 71 reflected from the first reflective layer 20 penetrates the light-transmitting layer 30 and irradiates the second reflective layer 60. The second reflective layer 60 will reflect the ultraviolet light 71 again, so that the ultraviolet light 71 continues to stay at the Repeated reflection between the first reflective layer 20 and the second reflective layer 60, so that the optical glue 31 between the pressing portion 41 and the transparent layer 30 can be uniformly irradiated by the ultraviolet light 71, reducing the optical The curing time of the glue 31 and the uniformity of curing of the optical glue 31 are improved. Since the reflection effect of the second reflective layer 60 is better than that of the pressing portion 41 of the circuit board 40, the curing effect of the optical glue 31 is more uniform and the curing time is shorter.

Furthermore, the creator found through actual experiments that after using the first reflective layer 20 and further using the second reflective layer 60, the curing effect of the optical glue 33 is improved. Please refer to Figures 4 and 5. In actual experiments, the creator used silver paste 40A as an alternative material for the circuit board 40, and used silver paste 40A with a width of 2mm and silver paste 40A with a width of 6mm as the different shielding sizes. Circuit board 40, in which FIG. 4 is the experimental state of the second preferred embodiment, and FIG. 5 is the experimental state of the first preferred embodiment, please refer to Table 1 below: State Silver paste width First reflective layer Second reflective layer Illumination module illumination The first embodiment 6mm Short version without Fully solidified Second embodiment 6mm Long version without Fully solidified The third embodiment 2mm Long version Have Fully solidified Table 1

It can be seen from Table 1 that regardless of the width of the silver paste 40A, the length of the first reflective layer 20, whether the second reflective layer 60 is provided, etc., in the actual curing process of the optical glue 31, the first reflective layer The layer 20 can reflect the ultraviolet light 71, so that the ultraviolet light 71 continuously irradiates the optical glue 31 under the silver paste 40A, which effectively solidifies the optical glue 31 completely and uniformly. That is to say, no matter how much the optical glue 31 is shielded by the pressing portion 41 of the circuit board 40, as long as the first reflective layer 20 is provided (or the second reflective layer 60 is further provided), there is no increase in the illumination module. The number of 70 and the increase in the manufacturing process can uniformly cure the optical glue 31, reduce the curing time of the optical glue 31, increase the process efficiency and production yield, and reduce the structural strength of the touch panel due to incomplete curing. The problem of insufficient, and at the same time, the disadvantage of avoiding the outflow of the uncured optical glue 31 and affecting the visual perception.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the professional technology Personnel, without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make slight changes or modification into equivalent embodiments with equivalent changes, but any content that does not deviate from the technical solution of the present invention is based on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the new technical solution.

10: Protection panel 11: Masking layer 20: The first reflective layer 30: light-transmitting layer 31, 33: Optical glue 40: circuit board 40A: Silver paste 41: Crimping part 43: Control Department 50: Induction module 60: second reflective layer 70: Illumination Module 71: Ultraviolet light 81: Protective cover 82: light-transmitting layer 83: circuit board 84: Touch module 85, 86: Optical glue 87: Ink layer 90, 93: UV module 91: reflective element

Figure 1: A side cross-sectional view of the first preferred embodiment of the present invention. Figure 2: A cross-sectional side view of the second preferred embodiment of the present invention. Figure 3: A cross-sectional side view of the third preferred embodiment of the present invention. Figure 4: Experimental schematic diagram of the first preferred embodiment of the present invention. Figure 5: Experimental schematic diagram of the second preferred embodiment of the present invention. Fig. 6: A schematic diagram of the first preferred embodiment of the present invention being actually illuminated by the light module. Fig. 7: A schematic diagram of the third preferred embodiment of the present invention actually being illuminated by the light module. Figure 8: A schematic diagram of a conventional touch module receiving ultraviolet light. Figure 9: Schematic diagram of the conventional touch module with reflective components during the manufacturing process. Figure 10: Schematic diagram of the conventional touch module manufacturing process with two UV modules.

10: Protection panel

11: Masking layer

20: The first reflective layer

30: light-transmitting layer

31, 33: Optical glue

40: circuit board

41: Crimping part

43: Control Department

50: Induction module

Claims (10)

A touch panel that can strengthen the curing of the gel at the shading area of the circuit board, including: A protection panel with four sides; A first reflective layer disposed on the protective panel and adjacent to one of the sides of the protective panel, and the first reflective layer is used to reflect an applied ultraviolet light; A circuit board comprising a pressing part and a control part, the pressing part is arranged on the first reflective layer through an optical glue; A sensor module is pasted on the first reflective layer and the pressing part of the circuit board through the optical glue. As described in claim 1 for the touch panel capable of strengthening the gel curing at the shading area of the circuit board, a second reflective layer is further provided under the pressing portion of the circuit board, and the second reflective layer is located opposite to the first reflective layer. Above. According to claim 1 or 2, the touch panel capable of strengthening the gel curing at the shading area of the circuit board, wherein the length of the first reflective layer is similar to the width of the sensing module. According to claim 3, the touch panel capable of strengthening the gel curing at the shading area of the circuit board, wherein the first reflective layer is a mirror film. According to claim 2, the touch panel capable of strengthening the gel curing of the shading part of the circuit board, wherein the second reflective layer is a mirror film. According to claim 4, the touch panel capable of strengthening the gel curing at the shading area of the circuit board is further provided with a light-transmitting layer above the first reflective layer. For the touch panel capable of strengthening the gel curing of the shading area of the circuit board as described in claim 6, a circle of shielding layer is formed around one surface of the protective panel, and the first reflective layer is disposed on the shielding layer. According to claim 1 or 2, the touch panel capable of strengthening the gel curing at the shading area of the circuit board, wherein the length of the first reflective layer is similar to the width of the protective panel. As described in claim 8 for the touch panel capable of strengthening the gel curing at the shading area of the circuit board, a light-transmitting layer is further provided above the first reflective layer. According to claim 9 of the touch panel capable of strengthening the gel curing at the shading area of the circuit board, a circle of shielding layer is formed around one surface of the protective panel, and the first reflective layer is disposed on the shielding layer.

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