TWI534666B - Method for assembling touch panel and touch panel - Google Patents

Description

Touch panel assembly method and touch panel

The invention relates to a method for assembling a touch panel and a touch panel.

During the assembly process of the touch panel, the cover glass and the sensing layer are generally attached together by a glue layer. Since the cover glass is printed with a certain thickness of the ink layer, the ink layer and the protective glass are A thickness difference is formed between the gaps, and the gap generated by the difference in thickness when the glue layer is attached to the glass causes the bubble layer to appear between the protective glass and the glue layer after the adhesion, affecting the appearance, and the bubble cannot be eliminated. The quality of the touch panel cannot be met.

In view of the above, it is necessary to provide a touch panel and a touch panel assembly method capable of eliminating air bubbles during assembly.

A method for assembling a touch panel, the touch panel includes a cover glass, a sensing layer and a glue layer, the glue layer being located between the cover glass and the sensing layer, the protective glass facing the sensing The edge of one side of the layer is coated with an ink layer having a visible area of an uncoated layer, and the method of assembling the touch panel comprises the steps of: making a glue layer having an intermediate area and surrounding the An edge region of the intermediate region, the intermediate region corresponding to the visible region and a distance of the intermediate region surface from the surface of the edge region is equal to a thickness of the ink layer, the edge region corresponding to the ink layer; The middle and edge regions of the glue layer are aligned The visible area and the ink layer are such that the glue layer is adhered to the ink layer without a gap; the sensing layer is attached to the glue layer.

A touch panel comprising a cover glass, a sensing layer and a glue layer, the glue layer being located between the cover glass and the sensing layer, the cover glass and the edge facing one side of the sensing layer being coated with ink a layer, the cover glass having a visible area of an uncoated layer, the glue layer comprising an intermediate area and an edge area, the intermediate area and the edge area respectively corresponding to the visible area and the ink layer, the intermediate area surface distance The distance of the surface of the edge region is equal to the thickness of the ink layer, and the glue layer is bonded to the ink layer without a gap.

Compared with the prior art, in the assembling method of the touch panel of the embodiment, the adhesive layer having the difference in thickness is prepared first, and the difference in thickness causes the adhesive layer to adhere to the ink layer without gaps, so that the adhesive layer can be completely completed. The gap between the ink layer and the protective glass is filled to prevent the generation of bubbles when the adhesive layer is attached, and the yield of the touch panel is improved.

10‧‧‧Touch panel

11‧‧‧protective glass

110‧‧‧visible area

111‧‧‧ edge

12‧‧‧Ink layer

13‧‧‧ glue layer

130‧‧‧Intermediate area

1301‧‧‧ upper surface

1302‧‧‧ side surface

131‧‧‧Edge area

1303‧‧‧ lower surface

14‧‧‧ sensing layer

20‧‧‧Mold

21‧‧‧ cavity

210‧‧‧First molding department

211‧‧‧Second molding department

FIG. 1 is a schematic plan view of a touch panel according to an embodiment of the invention.

2 is a schematic cross-sectional view of a touch panel according to an embodiment of the present invention.

Figure 3 is a schematic illustration of the formation of a glue layer.

As shown in FIG. 1 and FIG. 2 , the touch panel 10 of the embodiment of the present invention includes a cover glass 11 , an ink layer 12 , a glue layer 13 and a sensing layer 14 . The glue layer 13 is located between the cover glass 11 and the sensing layer 14 . .

The areas of the cover glass 11 and the glue layer 13 are both equal to or larger than the area of the sensing layer 14. When the area of the protective glass 11 is larger than the area of the sensing layer 14, the protective glass 11 can be better protected. The sensing layer 14 is protected.

In this embodiment, the area of the adhesive layer 13 is equal to the area of the sensing layer 14 such that the entire bonding surface of the sensing layer 14 is bonded to the adhesive layer 13.

In other embodiments, the area of the glue layer 13 may be slightly smaller than the area of the sensing layer 14, in other words, the edge of the glue layer 13 may be slightly smaller than the edge of the sensing layer 14.

The ink layer 12 is coated on the edge 111 of one side of the cover glass 11 and has a closed chevron structure, and the ink layer 12 faces the sensing layer 14. The area where the protective glass 11 is not coated with the ink layer 12 is the visible area 110, and the ink layer 12 is at least two layers.

The glue layer 13 includes an intermediate region 130 and an edge region 131, the edge region 131 surrounding the intermediate region 130 and the thickness of the intermediate region 130 and the edge region 131 being uniform. Wherein, the intermediate region 130 and the edge region 131 are not in the same plane toward the surface of the cover glass 11, such that the glue layer 13 has a thickness difference, and the thickness of the intermediate portion 130 is greater than the thickness of the edge region 131. The intermediate region 130 corresponds to the visible region 110 of the cover glass 11, the edge region 131 corresponds to the ink layer 12, and the area of the edge region 131 is greater than or equal to the area of the ink layer 12 and the surface of the intermediate region 130 is at a distance d1 from the surface of the edge region 131 equal to the ink layer. The thickness d2 of 12 is such that the adhesive layer 13 and the ink layer 12 are bonded without a gap.

The intermediate portion 130 has an upper surface 1301, a side surface 1302, and a lower surface 1303. The lower surface 1303 is simultaneously the lower surface of the edge region 131, and the side surface 1302 is connected to the upper surface 1301. The upper surface 1301 is attached to the cover glass 11 and the side surface 1302 is adhered to the surface of the ink layer 12 toward the visible area 110 and the shape of the side surface 1302 matches the shape of the ink layer 12 toward the visible area 110. In addition, the edge area 131 The ink layer 12 is adhered to the surface of the sensing layer 14 and is matched in shape such that the adhesive layer 13 is in close contact with the ink layer 12 without bubbles, and the lower surface 1303 is in contact with the sensing layer 14.

The glue layer 13 can be OCA (Optical Clear Adhesive) glue.

As shown in FIG. 3, the glue layer 13 is integrally formed by using the mold 20. The mold 20 has a cavity 21 in which the glue layer 13 is formed. The cavities 21 may be one or more, that is, the mold 20 is a mold or a mold.

The cavity 21 includes a first molding portion 210 and a second molding portion 211. The second molding portion 21 surrounds the first molding portion 210. The first molding portion 210 is used to form the intermediate portion 130 of the adhesive layer 13, and the second molding portion 211 is used. The edge region 131 of the glue layer 13 is formed.

The material for making the glue layer 13 is placed in the cavity 21, and after filling the entire cavity 21, the glue layer 13 can be formed, and one or more glue layers 13 can be formed by using the mold 20 at a time, so that the parameters of the glue layer 13 are made. The same, the structure is uniform.

The intermediate portion 130 of the prepared adhesive layer 13 is aligned with the visible region 110 of the protective glass, and the edge region 131 is aligned with the ink layer 12 on the protective glass 11 to adhere the adhesive layer 13 to the protective glass 11 to be glued. After being attached to the protective glass 11, the sensing layer 14 and the adhesive layer 13 are attached, thereby completing the assembly of the touch panel 10.

During the assembly process of the touch panel 10, the adhesive layer 13 having a difference in thickness is formed by the mold 20 in advance, and the difference in thickness causes the adhesive layer 13 to adhere to the ink layer 12 without gaps, so that the adhesive layer 13 can completely fill the ink layer 12 and The gap between the protective glasses 11 prevents the generation of bubbles when the adhesive layer 13 is attached, and improves the yield of the touch panel production.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Touch panel

11‧‧‧protective glass

110‧‧‧visible area

111‧‧‧ edge

12‧‧‧Ink layer

13‧‧‧ glue layer

130‧‧‧Intermediate area

1301‧‧‧ upper surface

1302‧‧‧ side surface

131‧‧‧Edge area

1303‧‧‧ lower surface

14‧‧‧ sensing layer

Claims (8)

A method for assembling a touch panel, the touch panel includes a cover glass, a sensing layer and a glue layer, the glue layer being located between the cover glass and the sensing layer, the protective glass facing the sensing The edge of one side of the layer is coated with an ink layer having a visible area of an uncoated layer, and the method of assembling the touch panel comprises the steps of: making a glue layer having an intermediate area and surrounding the An edge region of the intermediate region, the intermediate region corresponding to the visible region and a distance of the intermediate region surface from the surface of the edge region is equal to a thickness of the ink layer, the edge region corresponding to the ink layer, the glue The layer is an OCA glue; the intermediate portion and the edge region of the glue layer are respectively aligned with the visible area and the ink layer to make the glue layer adhere to the ink layer without gap; attaching the sensing layer On the glue layer. The method of assembling a touch panel according to claim 1, wherein the adhesive layer is formed by using a mold having a cavity, and the shape of the cavity is the same as the shape of the adhesive layer. The method of assembling a touch panel according to claim 1, wherein the ink layer is at least two layers. The method of assembling a touch panel according to claim 1, wherein an area of the cover glass is greater than or equal to an area of the sensing layer. A touch panel comprising a cover glass, a sensing layer and a glue layer, the glue layer being located between the cover glass and the sensing layer, the cover glass and the edge facing one side of the sensing layer being coated with ink a layer, the cover glass having a visible area of an uncoated layer, wherein the glue layer comprises an intermediate area and an edge area, the intermediate area and the edge area respectively corresponding to the visible area and the ink layer, the middle The distance of the surface of the region from the surface of the edge region is equal to the thickness of the ink layer, and the adhesive layer is adhered to the ink layer without a gap, and the adhesive layer is OCA glue, the ink layer is at least two layers. The touch panel of claim 5, wherein the intermediate region and the edge region each have a uniform thickness. The touch panel of claim 5, wherein the intermediate portion has an upper surface and a side surface connected to the upper surface, the upper surface being attached to the cover glass, the side surface being The portions of the ink layer that are facing toward the viewable area are conformed and matched in shape, and the edge regions are conformed to the portion of the ink layer that faces the sensing layer and are shaped to match. The touch panel of claim 7, wherein the adhesive layer has a lower surface, the lower surface is opposite to the upper surface, and the lower surface is in contact with the sensing layer.