TWI476657B - Touch panel and touch-display panel using the same - Google Patents

Description

Touch panel and touch display panel using same

The present invention relates to a touch panel and a touch display panel using the same, and more particularly to a touch panel having a protruding structure and a touch display panel using the same.

A conventional touch panel includes two conductive substrates with a spacing between the two conductive substrates to accommodate a spacer. However, since the pitch value is too large, a phenomenon of protrusion and floating may be felt during the process of touching the conductive substrate.

The present invention relates to a touch panel and a touch display panel using the same, which can improve the phenomenon of protrusion and floating of the touch panel.

According to an embodiment of the invention, a touch panel is proposed. The touch panel includes a conductive substrate, a conductive film, and an insulating adhesive. The conductive film has an inner surface, and the inner surface includes an edge region and a touch region, and the touch region protrudes from the edge region toward the conductive substrate. The insulating adhesive bonds the conductive substrate and the conductive film.

According to another embodiment of the present invention, a touch display panel is proposed. The touch display panel includes a touch panel and a display panel. The touch panel includes a conductive substrate, a conductive film, and an insulating adhesive. The conductive film has an inner surface, and the inner surface includes an edge region and a touch region, and the opposite sides of the touch region The edge region protrudes in the direction of the conductive substrate. The insulating adhesive bonds the conductive substrate and the conductive film. The display panel is relative to the touch panel configuration.

In order to provide a better understanding of the above and other aspects of the present invention, the following detailed description of the embodiments and the accompanying drawings

Please refer to FIG. 1A, which is an exploded view of a touch panel according to an embodiment of the invention. The touch panel 100 includes a conductive film 110 , a conductive substrate 120 , and an insulating adhesive 130 . The touch panel 100 is exemplified by a multi-point resistive touch panel. However, the touch panel 100 can also be a four-wire, five-wire, six-wire, seven-wire, eight-wire or other type of resistive touch. Control panel.

The conductive film 110 includes a light transmissive film 111 and a first conductive layer 112. The material of the transparent film 111 is, for example, polycarbonate (PC), polyethylene terephthalate (PET), polymethylmethacrylate (PMMA), and cyclic olefin copolymer ( Cyclic Olefin Copolymer) or other flexible materials.

The light transmissive film 111 has an opposite inner surface 110c and an outer surface 110s. The first conductive layer 112 is formed on the inner surface 110c of the transparent film 111 for sensing the touch signal in the first direction D1. The first conductive layer 112 includes a plurality of first electrodes 1121 and a plurality of first signal lines 1122, wherein the first electrodes 1121 are isolated from each other and extend along the first direction D1. The inner surface 110c defines an edge region 110c1 (FIG. 1B) and a touch region 110c2 (FIG. 1B). The first electrode 1121 is formed on the touch region 110c2, and each of the first signal lines 1122 is formed on the edge region 110c1 of the inner surface 110c. And connected to the corresponding first electrode 1121.

In the process, the first electrode material may be formed on the entire inner surface 110c of the light transmissive film 111 by, for example, a coating technique, and then the edge of the first electrode material may be etched to expose the edge region 110c1 of the inner surface 110c (the first 1B picture). Further, isolation trenches 1123 may be formed using, for example, laser cutting to form a plurality of first electrodes 1121 that are isolated from each other.

The material of the first electrode 1121 is, for example, a Transparent Conductive Oxide (TCO) or a transparent organic conductive material, wherein the transparent conductive material such as Indium Tin Oxide (ITO) or Indium Zinc (Indium Zinc) Oxide, IZO), and the transparent organic conductive material is, for example, polyethylene dioxythiophene (PEDOT). The material of the first signal line 1122 is, for example, a metal such as silver, which may be formed using, for example, a lithography process and/or a coating technique.

The conductive substrate 120 includes a transparent substrate 121 and a second conductive layer 122. The transparent substrate 121 has an opposite inner surface 120c and an outer surface 120s, and the second conductive layer 122 is formed on the inner surface 120c of the transparent substrate 121. The touch signal in the second direction D2 is sensed. The material of the light-transmitting substrate 121 includes glass or a material similar to the light-transmissive film 111.

The inner surface 120c includes an edge region 120c1 and a touch region 120c2. The second conductive layer 122 includes a plurality of second electrodes 1221 and a plurality of second signal lines 1222. The second electrodes 1221 are formed in the touch area 120c2 and extend along the second direction D2, and the second signal lines 1222 are formed therein. The edge region 120c1 of the surface 120c is connected to the corresponding second electrode 1221. The materials of the second electrode 1221 and the second signal line 1222 are similar to the first electrode 1121 and the first signal line 1122, respectively, and are not described herein again. The second electrode 1221 is formed in a similar manner to the first electrode 1121, and will not be described again.

Please refer to FIG. 1B, which is a cross-sectional view of the touch panel of FIG. 1A taken along the direction 1B-1B'. The touch region 110c2 of the transparent film 111 protrudes from the edge region 110c1 toward the conductive substrate 120 to form a protruding structure 114. Thus, the distance S1 between the conductive film 110 and the conductive substrate 120 can be reduced, and the light-transmissive film 111 can be raised and floated. unpleasant sight. In this example, the protruding structure 114 formed by the light-transmissive film 111 protruding toward the conductive substrate 120 can enter the step space between the first signal line 1122 and the first electrode 1121, and let the lower surface of the first electrode 1121 and the first surface The lower surface of the second signal line 1222 is substantially aligned with the insulating adhesive member 130. In one embodiment, the spacing S1 is reduced to about 60 microns.

Although the first electrode 1121 of FIG. 1B extends from the touch area 110c2 to the edge area 110c1; in another example, the first electrode 1121 may not extend to the edge area 110c1, but the first signal line 1122 extends from the edge area 110c1 to the touch. The control region 110c2 is connected to the first electrode 1121.

The outer surface 110s of the transparent film 111 includes an edge region 110s1 and a touch region 110s2. The touch region 110s2 is recessed toward the conductive substrate 120 with respect to the edge region 110s1 to form a recess structure 113. In another example, the recessed structure 113 may be omitted to make the entire outer surface 110s of the light transmissive film 111 coplanar.

The second signal line 1222 is inserted into the insulating adhesive member 130. The insulating adhesive member 130 is, for example, a double-sided tape that laterally extends into contact with the protruding structure 114 to bond the conductive film 110 and the conductive substrate 120. In this example, the insulating adhesive member 130 directly contacts the first conductive layer 112 and the second conductive layer 122. In one example, the length L1 of the insulating adhesive member 130 in contact with the protruding structure 114 is about 2 to 3 mm, which can achieve a good bonding effect between the conductive film 110 and the conductive substrate 120. However, the numerical range is not limited to the embodiment of the present invention. ,its In its embodiment, the length L1 can also be shorter or longer.

Although the second electrode 1221 of FIG. 1B extends from the touch area 120c2 to the edge area 120c1, in another example (not shown), the second electrode 1221 may not extend to the edge area 120c1, but the second signal line 1222 The edge region 120c1 extends to the touch region 120c2 to be connected to the second electrode 1221.

Please refer to FIG. 2, which is a cross-sectional view of a touch panel according to another embodiment of the present invention. The touch panel 200 includes a conductive film 210 , a conductive substrate 220 , and an insulating adhesive 130 .

The conductive film 210 includes a light transmissive film 111, a first conductive layer 112, and a first insulating layer 215. The first conductive layer 112 includes a plurality of first electrodes 1121 and a plurality of first signal lines 1122 (a single first electrode 1121 and a single first signal line 1122 are illustrated), wherein the first insulating layer 215 is formed in the first The edge region of the electrode 1121, and the first signal line 1122 is formed on the first insulating layer 215. The first signal line 1122 and the first electrode 1121 are isolated by the first insulating layer 215, so that some of the first signal lines 1122 are electrically short-circuited to each other through the first electrode 1121.

The conductive substrate 220 includes a transparent substrate 121, a second conductive layer 122, and a second insulating layer 223. The second conductive layer 122 includes a plurality of second electrodes 1221 and a plurality of second signal lines 1222 (a single second electrode 1221 and a single second signal line 1222 are illustrated), wherein the second insulating layer 223 is formed on the second electrode. The edge region 120c1 of 1221 and the second signal line 1222 are formed on the second insulating layer 223. The second signal line 1222 and the second electrode 1221 are separated by the second insulating layer 223, so that some of the second signal lines 1222 are electrically short-circuited to each other through the second electrode 1221. In another example, the structure of one of the conductive film 210 and the conductive substrate 220 may be similar to the corresponding conductive film 110 in FIG. 1B. Or the structure of the conductive substrate 120.

Similarly, the touch region 110c2 of the transparent film 111 protrudes toward the conductive substrate 120 with respect to the edge region 110c1 to form a protruding structure 114. Further, by the protrusion of the touch region 110c2 in the direction of the conductive substrate 120, the distance S1 between the conductive film 110 and the conductive substrate 120 can be reduced, and the problem of protrusion and floating of the transparent film 111 can be improved.

Please refer to FIG. 3 , which is a cross-sectional view of the touch display panel according to an embodiment. The touch display panel 10 is, for example, an electrophoretic display, a cholesteric liquid crystal display, a liquid crystal display, a bi-stable display, a multi-stable display, an Organic Light-Emitting Diode (OLED) display, and a light emitting diode (Light). -Emitting Diode, LED) display or other type of display panel.

The touch display panel 10 includes a display panel 12 , an outer frame 14 , and a touch panel 100 or 200 . The display panel 12 and the touch panel 100 are received in the outer frame 14 , wherein the display panel 12 is disposed opposite to the touch panel 100 .

In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Touch display panel

12‧‧‧ display panel

14‧‧‧Front frame

100,200‧‧‧ touch panel

110, 210‧‧‧ conductive film

110c, 120c‧‧‧ inner surface

110c1, 110s1, 120c1‧‧‧ marginal zone

110c2, 110s2, 120c2‧‧‧ touch area

110s, 120s‧‧‧ outer surface

111‧‧‧Transparent film

112‧‧‧First conductive layer

1121‧‧‧First electrode

1122‧‧‧First signal line

1123‧‧‧Isolation trench

113‧‧‧ recessed structure

114‧‧‧Outstanding structure

120, 220‧‧‧ conductive substrate

121‧‧‧Transparent substrate

122‧‧‧Second conductive layer

1221‧‧‧second electrode

1222‧‧‧second signal line

130‧‧‧Insulating adhesive parts

215‧‧‧First insulation

223‧‧‧Second insulation

D1‧‧‧ first direction

D2‧‧‧ second direction

L1‧‧‧ length

S1‧‧‧ spacing

FIG. 1A is an exploded view of a touch panel according to an embodiment of the invention.

FIG. 1B illustrates the direction 1B-1B' of the touch panel assembled in FIG. 1A. Cutaway view.

2 is a cross-sectional view of a touch panel in accordance with another embodiment of the present invention.

FIG. 3 is a cross-sectional view of the touch display panel according to an embodiment.

100‧‧‧ touch panel

110‧‧‧Electrical film

110c1‧‧‧Edge area

110c2‧‧‧ touch area

110s‧‧‧ outer surface

110s1‧‧‧Edge area

110s2‧‧‧ touch area

111‧‧‧Transparent film

112‧‧‧First conductive layer

1121‧‧‧First electrode

1122‧‧‧First signal line

113‧‧‧ recessed structure

114‧‧‧Outstanding structure

120‧‧‧Electrical substrate

120c1‧‧‧Edge area

120c2‧‧‧ touch area

121‧‧‧Transparent substrate

122‧‧‧Second conductive layer

1221‧‧‧second electrode

1222‧‧‧second signal line

130‧‧‧Insulating adhesive parts

L1‧‧‧ length

S1‧‧‧ spacing

Claims (10)

A touch panel includes: a conductive substrate; a conductive film having an inner surface, the inner surface including an edge region and a touch region, wherein the touch region of the inner surface is opposite to the edge region of the inner surface The conductive substrate protrudes to form a protruding structure; and an insulating adhesive member bonds the conductive substrate and the conductive film; wherein the conductive film further has an outer surface opposite to the inner surface, and the outer surface defines an edge region And a touch area, the touch area of the outer surface is recessed toward the conductive substrate with respect to the edge area of the outer surface. . The touch panel of claim 1, wherein the insulating adhesive member is a double-sided adhesive. The touch panel of claim 1, wherein the insulating adhesive member extends laterally to the protruding structure to adhere the protruding structure to the conductive substrate. The touch panel of claim 1, wherein the conductive film comprises: a light transmissive film; and a first conductive layer formed on the light transmissive film for sensing a touch along a first direction Control signal. For example, the touch panel described in claim 4, wherein the The edge bond directly contacts the first conductive layer. The touch panel of claim 4, wherein the first conductive layer comprises: a plurality of first electrodes extending along the first direction; and a plurality of first signal lines, each of the first signal lines forming And an edge region of the inner surface and connected to the corresponding first electrode. The touch panel of claim 1, wherein the conductive substrate comprises: a transparent substrate; and a second conductive layer formed on the transparent substrate for sensing a touch along a second direction a control signal; wherein the insulating adhesive directly contacts the second conductive layer. The touch panel of claim 7, wherein the transparent substrate has an inner surface, the inner surface of the transparent substrate defines an edge region and a touch region, and the second conductive layer comprises: a plurality of a second electrode extending along the second direction; and a plurality of second signal lines, each of the second signal lines being formed on the edge region of the inner surface of the transparent substrate and connected to the corresponding second electrode The second signal lines are inserted into the insulating adhesive. The touch panel of claim 1, wherein the conductive film comprises: a first insulating layer; and a first conductive layer formed on the first insulating layer; and the conductive substrate comprises: a second insulating layer; and a second conductive layer formed on the second insulating layer. A touch display panel comprising: the touch panel as described in claim 1; and a display panel disposed relative to the touch panel.