TWM461101U - Touch panel bridging structure - Google Patents

Description

Touch panel bridging structure

The present invention relates to a touch panel, and more particularly to a touch panel bridging structure with good reliability.

The touch panel is an inductive display device that provides a user with an intuitive touch using a finger or a stylus to achieve signal input.

Referring to FIG. 2 , the touch panel of the prior art is mainly formed on a substrate 50 with a plurality of first axial sensing lines 60 and a plurality of second axial sensing lines 70 interlaced with each other. 60, 70 can sense the touch command of the finger or the stylus. Referring to FIG. 3, an insulating layer 80 is formed at each of the intersections of the first axial sensing line 60 and the second axial sensing line 70. In the bridge structure, the bottom surface of the insulating layer 80 is in contact with the first axial sensing line 60 and the substrate 50, and the insulating layer 80 is in contact with the substrate 50 with the edge 81 thereof. The top surface of the insulating layer 80 is formed as a convex curved surface 82 and The second axial sensing line 70 is in contact with each other, so that the first axial sensing line 60 is electrically isolated from the second axial sensing line 70 to ensure the first axial sensing line 60 and the second axial direction. The touch command sensed by the sensing line 70 can be correctly interpreted.

However, the above-mentioned bridging structure has the following disadvantages: Referring to FIG. 3, when the convex curved surface 82 at the edge 81 of the insulating layer 80 is extended When the angle B between the line L1 and the surface of the substrate 50 is less than 20 degrees, the longitudinal thickness of the insulating layer 80 may be too thin, and the too thin insulating layer 80 cannot provide the first axial sensing line 60 and the second axial sensing line 70. A good insulation effect is obtained, and the first axial sensing line 60 may still be in contact with the second axial sensing line 70 to cause a short circuit; see FIG. 4, when the convex surface 82A at the edge 81A of the insulating layer 80A When the angle C between the extension line L2 and the surface of the substrate 50A is greater than 30 degrees, the longitudinal thickness of the insulating layer 80A may be too thick, and the top portion 83A of the insulating layer 80A may be sharp, and the sharp top portion 83A may be caused to straddle The second axial sensing line 70A above the insulating layer 80A is broken to induce failure.

In view of the above disadvantages of the prior art, the present invention provides a touch panel bridging structure by limiting the angle between the extension line of the convex curved surface at the edge of the insulating layer and the surface of the substrate within a range of 20 to 30 degrees. In order to ensure a good insulation between the first axial induction line and the second axial induction line, and the second axial induction line does not break.

In order to achieve the foregoing new object, the touch panel bridging structure designed by the present invention comprises a substrate, a first axial sensing circuit, a second axial sensing circuit and an insulating layer, wherein: the first axis The sensing line and the second axial sensing line are alternately formed on the surface of the substrate; the insulating layer is made of an electrically insulating material, and the insulating layer is disposed on the first axial sensing line and the second axial sensing line a staggered portion, the bottom surface of the insulating layer is in contact with the first axial sensing line and the substrate, the top surface of the insulating layer is formed into a convex curved surface and is in contact with the second axial sensing line, and the insulating layer is in contact with the substrate by the edge thereof , the extension of the convex curved surface at the edge and the substrate The angle between the surfaces is in the range of 20 to 30 degrees.

In the touch panel bridging structure, the angle between the extension line of the convex curved surface at the edge of the insulating layer and the surface of the substrate is 24 degrees.

The touch panel bridging structure, wherein the first axial sensing line and the second axial sensing line are made of indium tin oxide.

The touch panel bridging structure, wherein the substrate is made of glass.

The advantages and enhancements of the touch panel bridging structure provided by the present invention include at least: the angle between the extension line of the convex curved surface at the edge of the insulating layer and the surface of the substrate is limited to a range of 20 to 30 degrees. Thereby, the longitudinal thickness of the insulating layer is not too thin, providing a good insulating effect between the first axial sensing line and the second axial sensing line, and the longitudinal thickness of the insulating layer is not too thick, so the insulating layer The top portion is not sharp, thus preventing the second axial sensing line spanning over the insulating layer from being broken.

10‧‧‧Substrate

20‧‧‧First Axial Induction Line

30‧‧‧Second axial sensing line

40‧‧‧Insulation

41‧‧‧ convex surface

42‧‧‧ edge

43‧‧‧ top

50, 50A‧‧‧ substrate

60, 60A‧‧‧first axial sensing line

70, 70A‧‧‧second axial sensing line

80, 80A‧‧‧Insulation

81, 81A‧‧‧ edge

82, 82A‧‧‧ convex surface

83A‧‧‧ top

A, B, C‧‧‧ angle

L, L1, L2‧‧‧ extension lines

Figure 1 is a schematic cross-sectional view of the present invention.

2 is a schematic plan view of a touch panel of the prior art.

3 is a schematic cross-sectional view of a touch panel bridge structure of the prior art.

4 is a cross-sectional view showing another prior art touch panel bridge structure.

Referring to FIG. 1 , the touch panel bridging structure of the present invention includes a transparent substrate 10 , a first axial sensing line 20 , a second axial sensing line 30 , and an insulating layer 40 .

The substrate 10 is made of glass.

The first axial sensing line 20 and the second axial sensing line 30 are made of indium tin oxide (ITO) and have electrical conductivity. The first axial sensing line 20 and the second axial direction are The sensing lines 30 are alternately formed on the surface of the substrate 10.

The insulating layer 40 is made of an electrically insulating material, and the insulating layer 40 is disposed at the intersection of the first axial sensing line 20 and the second axial sensing line 30. The bottom surface of the insulating layer 40 and the first axial sensing The circuit 20 is in contact with the substrate 10, and the top surface of the insulating layer 40 is formed as a convex curved surface 41 and is in contact with the second axial sensing line 30. The first axial sensing line 20 and the second axial sensing are separated by the insulating layer 40. The line 30 is such that the first axial sensing line 20 is electrically isolated from the second axial sensing line 30, and the insulating layer 40 is in contact with the substrate 10 with its edge 42. The extension line L of the convex curved surface 41 at the edge 42 is The angle between the surfaces of the substrate 10 is in the range of 20 to 30 degrees. Preferably, the angle A between the extension line L of the convex curved surface 41 at the edge 42 of the insulating layer 40 and the surface of the substrate 10 is 24 degrees. .

The present invention is characterized in that the angle A between the extension line L of the convex curved surface 41 at the edge 42 of the insulating layer 40 and the surface of the substrate 10 is defined in the range of 20 to 30 degrees, so that the longitudinal thickness of the insulating layer 40 has a certain thickness, that is, a distance between the first axial sensing line 20 and the second axial sensing line 30 to fill a certain thickness of the insulating layer 40, thereby providing the first axial sensing line 20 and the second axis The insulating layer 40 has a good insulating effect, and the longitudinal thickness of the insulating layer 40 is not too thick, so that the top portion 43 of the insulating layer 40 does not have a sharp shape, thereby preventing the second portion from being over the insulating layer 40. The axial sensing line 30 has doubts about breakage.

10‧‧‧Substrate

20‧‧‧First Axial Induction Line

30‧‧‧Second axial sensing line

40‧‧‧Insulation

41‧‧‧ convex surface

42‧‧‧ edge

43‧‧‧ top

A‧‧‧ angle

L‧‧‧ Extension line

Claims (5)

A touch panel bridging structure includes a substrate, a first axial sensing line, a second axial sensing line, and an insulating layer, wherein: the first axial sensing line and the second axial sensing line Formed alternately on the surface of the substrate; the insulating layer is made of an electrically insulating material, and the insulating layer is disposed at an intersection of the first axial sensing line and the second axial sensing line, and the bottom surface of the insulating layer An axial sensing line is in contact with the substrate, the top surface of the insulating layer is formed as a convex curved surface and is in contact with the second axial sensing line, and the insulating layer is in contact with the substrate by the edge thereof, and the extension line of the convex curved surface at the edge is The angle between the surfaces of the substrates is in the range of 20 to 30 degrees. The touch panel bridging structure according to claim 1, wherein an angle between the extension line of the convex curved surface at the edge of the insulating layer and the surface of the substrate is 24 degrees. The touch panel bridging structure of claim 1, wherein the first axial sensing line and the second axial sensing line are made of indium tin oxide. The touch panel bridging structure of claim 2, wherein the first axial sensing line and the second axial sensing line are made of indium tin oxide. The touch panel bridging structure according to any one of claims 1 to 4, wherein the substrate is made of glass.