TW201447671A - Protective substrate and touch panel using same - Google Patents

Abstract

The present invention relates to a protective substrate and a touch panel using the same. A decoration layer attaches to a periphery of the protective substrate. The decoration layer includes at least two layers, and the at least two layers are stacked together. In a combination of each two adjacent layers of the decoration layer, the one of the two adjacent layers which is adjacent to the protective substrate includes a width greater than the other one of the two adjacent layers thereby forming a step. A first numbered layer of the decoration layer which is nearest to the protective substrate defines a transparent area of the touch panel. At least one layer of the decoration layer except the first numbered layer defines a notch.

Description

Touch panel and protective substrate for touch panel

The invention relates to a touch panel and a protection substrate for the touch panel.

With the rapid development of technology, touch technology, as the most simple, convenient and natural human-machine dialogue mode, has been widely recognized around the world and is widely used in various industries.

In the current touch panel, a conventional two-layer substrate structure, that is, a touch substrate and a protective substrate, and the touch substrate and the protective substrate of the touch panel are generally fixed by optical adhesive bonding. The touch substrate is provided with a touch sensing layer and a conductive line electrically connected to the touch sensing layer. The periphery of the protective substrate is provided with an opaque ink for shielding conductive lines which are generally made of opaque metal silver wires. In order to ensure the shading effect of the ink, the ink needs to maintain a certain thickness.

Due to the thickness of the ink, a gap is generated between the ink and the protective substrate. Therefore, in the bonding process of the touch panel, the optical adhesive also needs to reach a certain thickness to fill the gap between the ink and the protective substrate, thereby preventing The visible area of the touch panel generates bubbles. However, by increasing the thickness of the optical adhesive to prevent the generation of bubbles in the visible area, the optical adhesive is too thick, resulting in a decrease in the touch capability of the touch panel, and the performance of the touch panel is poor.

The invention provides a touch panel capable of reducing bubble generation and better touch performance.

A touch panel includes a touch sensing layer and a protective substrate, and an ink layer is disposed around the protective substrate. The ink layer comprises at least two layers of ink disposed in a stack, wherein an ink width of the adjacent two layers of ink adjacent to the protective substrate is greater than a width of the ink away from the protective substrate to form a step, and the first layer of ink adjacent to the protective substrate defines the ink In the visible area of the touch panel, in addition to the first layer of ink, at least one of the other layers of the ink layer is provided with a notch recessed from the visible area toward the edge of the protective substrate, and the touch sensing layer corresponds to the visible area. Settings.

A protective substrate for a touch panel, wherein an ink layer is disposed around the protective substrate. The ink layer comprises at least two layers of ink disposed in a stack, wherein an ink width of the adjacent two layers of ink adjacent to the protective substrate is greater than a width of the ink away from the protective substrate to form a step, and the first layer of ink adjacent to the protective substrate defines the ink In the visible area of the touch panel, in addition to the first layer of ink, at least one of the other layers of the ink layer is provided with a notch recessed from the visible area toward the edge of the protective substrate.

Since the touch panel of the present invention and the ink layer on the protective substrate for the touch panel are of a multi-layer structure, the air appearing at the edge of the ink layer at the time of bonding is reduced, and at least one layer of ink is removed except for the first layer of ink. The gap is formed by the visible area to the edge of the protective substrate, and the notch can concentrate the gas in the bonding to the notch, thereby preventing bubbles from being generated in the visible area to ensure the touch performance of the touch panel.

1 is a schematic view of a first embodiment of a touch panel of the present invention.

2 is a plan view of an ink layer coated on a protective panel of the touch panel shown in FIG. 1.

3 is a schematic view of a second embodiment of the touch panel of the present invention.

4 is a schematic view of a third embodiment of the touch panel of the present invention.

FIG. 5 is a schematic view of another modified embodiment of the touch panel of the present invention.

Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of the touch panel 1 of the present invention. The touch panel 1 includes a transparent substrate 12 , a protective substrate 15 , and an optical adhesive 13 for bonding the transparent substrate 12 and the protective substrate 15 . The transparent substrate 12 is provided with a touch sensing layer 124 and a conductive line 122 electrically connected to the touch sensing layer 124.

An ink layer 14 is disposed around the protective substrate 15 for shielding the conductive line 122. The ink layer 14 includes at least two layers of ink disposed in a stack. In the present embodiment, the ink layer 14 is two layers. The first layer of ink 142 is disposed on the protective substrate 15 and defines the visible region 16 of the touch panel 1. The second layer of ink 145 is disposed on the first layer of ink 142, and the width of the first layer of ink 142 is greater than the width of the second layer of ink 145 to form between the first layer of ink 142 and the second layer of ink 145. A step. The touch sensing layer 124 corresponds to the visible area 16 of the touch panel 1 .

Referring to FIG. 2 together, the first layer of ink 142 of the ink layer 14 defines a viewing zone 16 that is rectangular. And the second layer of ink 145 is provided with a notch 1450 which is retracted from the visible area 16 toward the edge of the protective substrate 15 at four corners corresponding to the visible area 16 as an escape hole. The shape of the visible area 16 can be changed as needed. The shape, number and position of the notch 1450 can be changed according to the design. Preferably, the notch 1450 is disposed at a corner of the second layer of ink 145 corresponding to the viewable area 16.

Since the ink layer 14 of the present invention is designed as a structure of at least two layers, the at least two layers are structured to reduce air present at the edges of the ink layer 14 when bonded. A notch 1450 is disposed on the second layer of ink. The notch 1450 can concentrate the gas in the bonding on the notch 1450 to prevent bubbles from being generated in the visible area, thereby ensuring the touch performance of the touch panel 1.

Please refer to FIG. 3 , which is a schematic diagram of a second embodiment of the touch panel 2 of the present invention. The touch panel 2 is similar to the touch panel 1 of the first embodiment, except that the ink layer 24 has a three-layer structure, the third layer of ink 246 is disposed on the second layer of ink 245, and the second layer The width of the layer ink 245 is greater than the width of the third layer of ink 246 to form a further step between the second layer of ink 245 and the third layer of ink 246. The second layer of ink 245 is provided with a notch 2450 as an escape hole.

Please refer to FIG. 4 , which is a schematic diagram of a third embodiment of the touch panel 3 of the present invention. The touch panel 3 is similar to the touch panel 2 of the second embodiment, and the difference is that the second layer of ink 345 is provided with a notch 3450 as an escape hole, and the third layer of ink 346 is also provided as an escape. The notch 3460 of the vent is formed, and the notch 3450 on the second layer of ink 345 is disposed at four corners of the viewable area corresponding to the notch 3460 on the third layer of ink 346. The position of the notches 3450 and 3460 can be changed. The notch 3450 on the second layer of ink 345 and the notch 3460 on the third layer of ink 346 can also be offset.

Of course, the present invention is not limited to the preferred embodiment disclosed above. For example, the touch panel of the present invention may not be a conventional two-layer substrate structure, and the touch panel of the present invention is a single-layer substrate structure (refer to FIG. 5), that is, The touch panel of the present invention includes only the protection substrate. The touch sensing layer 424 and the conductive line 422 are disposed on the protection substrate. The touch sensing layer 424 is disposed on the visible area of the protection substrate, and the conductive line 422 is disposed on the ink layer. The layered touch panel is adhesively attached to a display such as a liquid crystal display or an organic electroluminescent display via an optical adhesive. Moreover, the number of layers of the ink layer in the present case can be changed as needed, and at least two layers can be stacked. Among the two adjacent ink layers, the ink width adjacent to the protective substrate is larger than the ink width away from the protective substrate to form a step. And in addition to the first layer of ink, the ink of at least one of the remaining layers may be provided with a notch recessed from the visible area toward the edge of the protective substrate.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1. . . Touch panel

12. . . Transparent substrate

124,424. . . Touch sensing layer

122,422. . . Conductive line

13. . . Optical glue

15, 25, 35. . . Protective substrate

14. . . Ink layer

16. . . Visual area

142, 242, 342. . . First layer ink

145, 245, 345. . . Second layer ink

246, 346. . . Third layer ink

1450, 2450, 3450, 3460. . . gap

15. . . Protective substrate

142. . . First layer ink

145. . . Second layer ink

1450. . . gap

Claims (10)

A touch panel includes a protective substrate and a touch sensing layer, wherein the protective substrate is provided with an ink layer, wherein the ink layer comprises at least two layers of ink disposed in a stack, wherein adjacent two layers of ink are adjacent to the protective substrate The width of the ink is greater than the width of the ink away from the protective substrate to form a step, and the first layer of ink adjacent to the protective substrate defines a visible area of the touch panel, and at least one of the other layers of the ink layer except the first layer of ink A notch is formed on the edge of the protection substrate by the visible area, and the touch sensing layer is disposed corresponding to the visible area. The touch panel of claim 1, wherein the touch sensing layer is directly disposed on the protection substrate. The touch panel of claim 2, wherein the protective substrate is fixed to a display via an optical adhesive. The touch panel of claim 1, wherein the touch panel further comprises a transparent substrate disposed opposite to the protection substrate, wherein the touch sensing layer is disposed on a portion of the transparent substrate corresponding to the visible area, the protection The panel and the transparent substrate are fixed via optical adhesive bonding. The touch panel of claim 1, wherein the ink layer is provided with a notch at a corner of the ink of at least one of the other layers of the first layer of ink. The touch panel of claim 1, wherein the visible area is a rectangle, and the notch is disposed at four corners of the visible area. The touch panel of claim 1, wherein the ink layer has a three-layer structure. The touch panel of claim 7, wherein the second layer and the third layer of ink are provided with a notch, and the second layer is disposed corresponding to the notch on the third layer of ink. A protective substrate for a touch panel, wherein the protective substrate is provided with an ink layer, wherein the ink layer comprises at least two layers of ink disposed in a stack, wherein an ink width of the adjacent two layers of ink adjacent to the protective substrate The ink is wider than the distance from the protective substrate to form a step, and the first layer of ink adjacent to the protective substrate defines a visible area of the touch panel, and at least one of the other layers of the ink layer is disposed on the ink other than the first layer of ink. There is a gap that is retracted from the viewable area toward the edge of the protective substrate. The protection substrate for a touch panel according to claim 9, wherein the visible area of the protection substrate is provided with a touch sensing layer.