TWI641977B - Display device with touch sensing structure - Google Patents

Abstract

A touch display structure includes a display module and a touch detection layer. The display module has a visible area and a side area. The touch detection layer is attached to the visible area and has a bent portion covering the side area. The bent portion of the touch detection layer has a surface formed by a plurality of continuous arcs, and each arc The bending radius of the shape is less than 0.1 mm.

Description

Touch display structure

The present invention relates to a touch module structure, and more particularly to a touch module structure of a display.

In recent years, most of the screens of handheld mobile electronic devices have been changed to touch screens so that users can input data more conveniently. The novel structure and novel appearance of handheld mobile electronic devices have become the pursuit of aesthetics in the manufacturing industry and consumers. Narrow bezels and borderless designs are a current market trend. This architecture can be achieved by reducing the front edge routing area. .

One of the implementation methods for the narrow bezel and bezel-free design of handheld mobile electronic devices is to reduce the front edge routing area by folding back a part of the touch detection layer to the side or back of the display panel. However, after the touch detection layer is bent, problems such as large-angled back-bending stress concentration and poor-angled back-bending applicability often occur, which may lower the yield of the process.

The invention proposes an innovative touch display structure to solve the problems of the prior art.

According to an embodiment of the present invention, a touch display structure includes a display module and a touch detection layer. The display module has a visible area and a side area. The touch detection layer is attached to the visible area and has a bent portion covering the side area. The bent portion of the touch detection layer has a surface formed by a plurality of continuous arcs, and each arc The bending radius of the shape is less than 0.1 mm.

According to an embodiment of the present invention, the continuous arcs are located on an upper surface or a lower surface of the bent portion.

According to an embodiment of the invention, the continuous arcs are located on an upper surface and a lower surface of the bent portion.

According to an embodiment of the present invention, the continuous arcs on the upper surface of the bent portion are at least partially conformal to the continuous arcs on the lower surface of the bent portion.

According to an embodiment of the present invention, the bent portion of the touch detection layer has a U-shaped cross section.

According to an embodiment of the present invention, the thickness of the bent portion of the touch detection layer is greater than 10 microns.

According to an embodiment of the present invention, a distance between the bent portion of the touch detection layer and a visible area of the display module is greater than 0.5 mm.

According to an embodiment of the present invention, the total length of the surfaces of the continuous arcs of the bent portion is greater than the total length of the surfaces of the side regions of the display module.

According to an embodiment of the present invention, the touch detection layer includes a transparent insulating layer and a conductive detection pattern.

According to an embodiment of the present invention, the conductive detection pattern is located at a light transmitting position. A single surface or two opposing surfaces of an insulating layer.

To sum up, in the touch display structure of the present invention, the touch detection layer forms a plurality of continuous arcs (or waves) on the surface of the portion to be bent, so that the stress generated by the reflexion is transmitted and diffused through the arc. In order to achieve the effect of reducing the concentration of reverse bending stress, avoiding the touch detection layer from being damaged or broken in the bending region. In addition, multiple continuous arc designs can also increase the ability of the touch detection layer to affix to complex surface surfaces, thereby enabling the touch module of the display device to have higher reliability and yield in the bending area.

100‧‧‧Touch display structure

100’‧‧‧ touch display structure

102‧‧‧Display Module

103‧‧‧touch detection layer

104‧‧‧Transparent Insulating Layer

104a‧‧‧upper / outer surface

104b‧‧‧bottom / inner surface

106‧‧‧Conductive detection pattern

108‧‧‧Optical glue

AA‧‧‧Viewable area

BA‧‧‧Bent part

EA‧‧‧Side Area

D‧‧‧distance

d1‧‧‧ length

d2‧‧‧length

d3‧‧‧ length

L1‧‧‧ length

L2‧‧‧ length

L3‧‧‧ length

T‧‧‧thickness

R‧‧‧ bending radius

In order to make the above and other objects, features, advantages, and embodiments of the present invention more comprehensible, the detailed description of the drawings is as follows: FIG. 1 illustrates a touch display according to an embodiment of the present invention. A schematic sectional view of the structure; and FIG. 2 is a schematic sectional view of a touch display structure according to another embodiment of the present invention.

One aspect of the present invention is to provide a touch display structure for an electronic device, so that the touch module of the electronic device has higher reliability in the side area.

Please refer to FIG. 1, which is a schematic cross-sectional view of a touch display structure according to an embodiment of the present invention. The touch display structure 100 includes a display module 102 and a touch detection layer 103. The display module 102 has a visual Area AA and side area EA. The touch detection layer 103 is attached to the visible area AA of the display module 102 and has a bent portion BA covering the side area EA of the display module 102. The bent portion BA of the touch detection layer 103 has a surface formed by a plurality of continuous arcs, and the bending radius R of each arc is less than 0.1 mm. In the embodiment of the present application, the display module 102 may be a display panel such as a liquid crystal display panel, an organic light emitting diode, an electronic paper, or an electrophoretic display panel.

The touch detection layer 103 includes a transparent insulating layer 104 and a conductive detection pattern 106. In the figure, although the conductive detection pattern 106 is only shown on the upper surface or the outer surface 104 a of the transparent insulating layer 104, it may also be located on the lower surface or the inner surface 104 b of the transparent insulating layer 104. In other words, the conductive detection pattern 106 is located on a single surface or two opposite surfaces of the transparent insulating layer 104. The conductive detection pattern 106 is scattered in the visible area and the bent portion of the transparent insulating layer 104.

In the embodiment of the present application, the material of the light-transmitting insulating layer 104 can be, for example, polyethylene terephthalate (PET), polycarbonate (PC), or cyclic olefin copolymer (Cyclo Olefin Polymers, COP). Polyethylene-lene Naphtalate (PEN) or flexible glass, but it is not limited to this. The conductive detection pattern 106 may be, for example, an indium tin oxide conductive layer or other metal conductive layers, but it is not limited thereto.

In the embodiment of the present application, the touch detection layer 103 covers the visible area AA and the side area EA of the display module 102 with transparent optical adhesive 108 (Optical Clear Adhesive). In order to reduce the problem of stress concentration and unevenness after the bent portion BA of the touch detection layer 103 is pasted on the side area EA of the display module 102, the surface of the bent portion BA forms a continuous plurality of arcs. . each The curved radius R of an arc-shaped surface is smaller than the thickness of the side of the display module 102 (for example, d2) and smaller than the aforementioned 0.1 mm.

In the embodiment of the present application, the thickness T of the touch detection layer 103 in the visible area AA and the bent portion BA are substantially the same, and the thickness T is greater than about 10 microns. In addition, a distance D between the bent portion BA of the touch detection layer 103 and the visible area AA of the display module 102 is greater than 0.5 mm.

In the embodiment of the present case, the bent portions BA on both sides of the touch detection layer 103 cover three sides of the display module 102 above, the side, and the lower side, so that the bent portion BA has A U-shaped cross section.

Because the surface of the bent portion BA is formed by continuous arcs, the total length of the surface of the continuous arc is greater than the total length of the surface of the side region EA corresponding to the display module 102. For example, the length of the upper side area EA of the display module 102 is d1, and the surface length L1 of the corresponding bent portion BA is greater than the length d1; the side length of the side area EA of the display module 102 is d2 While the length L2 of the surface of the corresponding bent portion BA is greater than the length d2; the length of the bottom surface of the side area EA of the display module 102 is d3, and the surface length L3 of the corresponding bent portion BA is the length L3 Greater than length d3. Therefore, the total surface length (L1 + L2 + L3) of the continuous arc is larger than the total surface length (d1 + d2 + d2) of the side area EA corresponding to the display module 102.

Please refer to the drawings. In the embodiment of the present case, the continuous arc (or wave) on the upper surface or outer surface 104a of the bent portion BA is conformal on the lower surface or inner surface 104b of the bent portion BA. The continuous arc, that is, the continuous arc on the upper and lower surfaces (or the inner and outer surfaces) of the bent portion BA is consistent.

Please refer to FIG. 2, which is a schematic cross-sectional view of a touch display structure according to another embodiment of the present invention. The touch display structure 100 ′ differs from the aforementioned touch display structure 100 mainly in that the bent portion BA of the touch detection layer 103 covers two surfaces such as above and sides of the side area EA of the display module 102. Without covering the lower surface of the side area EA of the display module 102.

The touch display structure 100 'also includes a display module 102 and a touch detection layer 103, and the conductive detection pattern 106 can be located on a single surface or two opposite surfaces of the transparent insulating layer 104. Other features are the same as the structure and design of the touch display structure 100 described above, and will not be described again.

To sum up, in the touch display structure of the present invention, the touch detection layer forms a plurality of continuous arcs (or waves) on the surface of the portion to be bent, so that the stress generated by the reflexion is transmitted and diffused through the arc. In order to achieve the effect of reducing the concentration of reverse bending stress, avoiding the touch detection layer from being damaged or broken in the bending region. In addition, multiple continuous arc designs can also increase the ability of the touch detection layer to affix to complex surface surfaces, thereby enabling the touch module of the display device to have higher reliability and yield in the bending area.

Although the present invention has been disclosed as above with several embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field to which the present invention pertains can make various modifications without departing from the spirit and scope of the present invention. Changes and retouching, so the protection scope of the present invention shall be determined by the scope of the appended patent application.

Claims (10)

A touch display structure includes: a display module having a visible area and a side area; and a touch detection layer attached to the visible area and having a bent portion covering the side Area, wherein the bent portion of the touch detection layer has a surface formed by a plurality of continuous arcs, and a curved radius of each of the arcs is less than 0.1 mm. The touch display structure according to item 1 of the patent application scope, wherein the continuous arcs are located on an upper surface or a lower surface of the bent portion. The touch display structure according to item 1 of the scope of patent application, wherein the continuous arcs are located on the upper surface and the lower surface of the bent portion. The touch display structure according to item 3 of the application, wherein the continuous arcs on the upper surface of the bent portion are at least partially conformal to the continuous arcs on the lower surface of the bent portion. The touch display structure according to item 1 of the patent application scope, wherein the bent portion has a U-shaped cross section. The touch display structure according to item 1 of the scope of the patent application, wherein the thickness of the bent portion is greater than 10 microns. According to the touch display structure described in item 1 of the patent application scope, a distance between the bent portion of the touch detection layer and the visible area of the display module is greater than 0.5 mm. According to the touch display structure described in item 1 of the patent application scope, wherein the total length of the surfaces of the continuous arcs of the bent portion is greater than the total length of the surface of the side region of the display module. The touch display structure according to item 1 of the scope of the patent application, wherein the touch detection layer includes a transparent insulating layer and a conductive detection pattern. The touch display structure according to item 9 of the application, wherein the conductive detection pattern is located on a single surface or two opposite surfaces of the transparent insulating layer.