TWM499597U - Touch panel structure of non-border - Google Patents

Description

Borderless touch panel

The present invention relates to a touch panel, and more particularly to a touch panel without a frame.

Please refer to FIG. 8 , which is a schematic diagram of a conventional touch panel. The touch panel applied to the mobile phone is taken as an example. The touch panel is formed with a black frame layer 61 around the top, bottom, left and right sides of the substrate 60. The other areas outside the black frame layer 61 are an operation area, and the operation area is mainly formed with The plurality of sensing lines 62 and 63 are arranged in a row and a column to detect a touch signal generated when the user operates the touch panel. The sensing lines 62, 63 of each row or column are connected to a signal line 64, which is the running area of the periphery of the black frame layer 61.

Taking the touch panel in the figure as an example, the signal lines 64 extend along the black frame layer 61 on the long side of the substrate 60. The signal line 64 is formed of a metal material, so it must be disposed in the area where the black frame layer 61 is located, and the signal line 64 is shielded by the black frame layer 61 to prevent the user from viewing the metal line by operating the touch panel. Reflective and affect the visual beauty.

As shown in FIG. 9, it is assumed that the metal signal line 64 is directly formed in the running area of the substrate 60 without covering the black frame layer, and when the external ambient light enters the substrate 60, it will be directly reflected by the signal line 64, and the user The distribution of the signal lines 64 can be seen in the line area.

Because the upper, lower, left, and right periphery of the existing substrate 60 still needs to cover the black frame layer 61 to shield the signal line 64, when the user operates the touch panel, the visible black frame area can be seen around, so the touch It is also difficult for the control panel to achieve a frameless visual experience.

In view of the fact that the existing touch panel still has to be provided with a black frame layer around the substrate, the frameless effect cannot be achieved. The main purpose of the present invention is to provide a frameless touch panel to improve the visible area of the touch panel.

The main technical means for achieving the above object is to make the frameless touch panel include: a substrate having a surface, and a black frame layer is disposed on opposite sides of the surface, and the surface is oppositely The two sides of the substrate are disposed on the surface of the substrate, and the black frame layer is not disposed to form a frameless substrate, wherein at least one side of the black frame layer is not used as a running line area; a plurality of first sensing lines arranged along the first axial direction and a plurality of second sensing lines extending along the second axial direction, wherein the first sensing line and the second sensing line are insulated and staggered The circuit layer includes a plurality of bridges and a plurality of signal lines. The plurality of bridges are disposed on the electrode pattern layer, and the plurality of signal lines are electrically connected to the first sensing line and the second sensing line. And extending in the running line area, wherein a blackening film is disposed between each bridge and the substrate, and a blackening film is also disposed between each signal line and the substrate.

The substrate covers the black frame layer only on the opposite side regions, and the opposite side regions are maintained as a frameless structure and can be used as a running line area, even if the signal line extends through the running line area, because each signal line is combined with one The blackening film overlaps, and the blackening film can absorb or block the light, avoiding the reflection of the signal line and affecting the user's viewing, so the signal line still has a good concealing effect in the running line area.

In order to explain the structure of the created borderless touch panel, the process will be described first with reference to FIG. 1 to FIG. 6 to understand the detailed structure thereof. First, referring to FIG. 1, a partial black frame layer 11 is formed on a surface (for example, an inner surface) of a substrate 10. As an example, the substrate 10 forms a black frame layer 11 only on the upper and lower edges. However, the black frame layer 11 is not provided on the left and right sides of the substrate 10, and the substrate 10 having no frame is formed. The substrate 10 includes an operation area and at least one running line area 12 in a region where the black frame layer 11 is not disposed. The running line area 12 may be disposed on the left, right side or both sides of one of the substrates 10, The substrate 10 has opposite short sides and opposite long sides, wherein the black frame layer 11 is disposed on opposite short sides of the surface of the substrate 10, and the long side of the right side of the substrate 10 is the running line area 12. .

As shown in FIG. 2, an electrode pattern layer is formed on the surface of the operation region, and the electrode pattern layer is mainly composed of indium tin oxide (ITO), and the electrode pattern layer includes a first axial direction (such as an X axis). An extended first plurality of sensing lines 21 and a plurality of second sensing lines 22 extending along a second axis (eg, the Y axis), wherein each of the first sensing lines 21 is formed by a plurality of first senses The electrodes 210 are integrally connected, and each of the second sensing lines 22 includes a plurality of second sensing electrodes 220 that are separated but not yet connected.

As shown in FIG. 3, a plurality of insulating layers 30 are formed on the electrode pattern layer, and each insulating layer 30 is spanned between adjacent two second sensing electrodes 220 extending in the same row, and may be first The sensing electrode 210 remains insulated to avoid shorting of the first sensing line 21 and the second sensing line 22.

As shown in FIGS. 4 and 5, after the insulating layer 30 is formed, a blackening film 40 is entirely coated on the surface of the substrate 10, and a circuit layer is completely sputtered on the surface of the blackening film 40. 50. The circuit layer 50 is formed of a metallic material and will serve as a bridge and signal line.

As shown in FIG. 6, the wiring layer 50 and the blackening film 40 are etched according to a predetermined pattern. During the etching process, the wiring layer 50 and the blackening film 40 are simultaneously removed by etching, so The circuit layer 50 and the blackened film 40 have the same pattern. After the circuit layer 50 is etched, a plurality of bridges 52 and signal lines 54 are formed, and each of the bridges 52 and the signal lines 54 has a blackening film 40. The positions of the plurality of bridges 52 are respectively located on the plurality of insulating layers 30, and each of the bridges 52 is electrically connected to two adjacent second sensing electrodes 220 of the same row. Each signal line 54 is electrically connected to a corresponding first sensing line 21 or a second sensing line 22. The line width of each signal line 54 is approximately between 10 and 20 nm.

After the etching is completed, the touch panel is formed without a frame. The touch panel comprises a substrate 10, and a black frame layer 11 is disposed on opposite sides of the surface, and the opposite sides of the surface are maintained. A black frame layer 11 is disposed, and at least one side of the black frame layer 11 is disposed as a running line region 12; and a surface of the substrate 10 includes a plurality of first sensing lines extending along the first axial direction. 21, and a plurality of second sensing lines 22 extending along the second axial direction, wherein the first sensing line 21 and the second sensing line 22 are insulated and staggered, and each of the first sensing lines 21 includes a plurality of The first sensing electrodes 210 are integrally connected to each other, and each of the second sensing lines 22 includes a plurality of second sensing electrodes 220, and an insulating layer 30 is disposed between the two adjacent second sensing electrodes 220.

On the surface of each insulating layer 30, there are laminated blackening films 40 and bridges 52, and two adjacent second sensing electrodes 220 are electrically connected by a bridge 52; the surface of the running line area 12 has a superposition The blackening film 40 and the signal line 54 are connected to a corresponding first sensing line 21 or a corresponding second sensing line 22.

As shown in FIG. 7 , it is a partial cross-sectional view of the running area 12 . Note that when viewing or operating the touch panel, the user operates on the surface (such as the outer surface) on which the electrode pattern layer is not disposed on the substrate 10 . Therefore, in the drawing direction, the blackening film 40 and the signal line 54 are sequentially provided below the substrate 10. When the user operates the touch panel, even if the ambient light L enters the substrate 10, it will be blocked or absorbed by the blackening film 40 without causing reflection, so that the blackening film 40 is not visually seen. Under the signal line 54 composed of metal, the signal line 54 has a good concealing effect in the running area 12, so that the touch panel has almost no left and right borders.

In addition to the borderless visual effect, the blackened film 40 prevents the metal bridge 52 from being seen by the user even if the size of the metal bridge 52 is increased to increase the process yield.

10, 60‧‧‧ substrate
11, 61‧‧‧ black frame
12‧‧‧Running area
21‧‧‧First sensing line
22‧‧‧Second sensing line
210‧‧‧First sensing electrode
220‧‧‧Second sensing electrode
30‧‧‧Insulation
40‧‧‧Blackening film
50‧‧‧Line layer
52‧‧‧Bridge
54‧‧‧Signal lines
62,63‧‧‧Sensing lines
64‧‧‧Signal lines

Figure 1: Schematic diagram of the creation of a black frame on a substrate. Figure 2: Schematic representation of the creation of a sensing electrode on a substrate. Figure 3: Schematic diagram of the creation of an insulating layer on a substrate. Figure 4: Schematic representation of the creation of a blackened film on a substrate. Figure 5: Schematic diagram of the creation of a circuit layer on a substrate. Figure 6: Schematic diagram of the created touch panel. Figure 7: A partial cross-sectional view of the touch panel of the present invention. Figure 8: Schematic diagram of the existing touch panel. Figure 9: Schematic diagram of the black box layer without the black line layer in the running area of the touch panel.

10‧‧‧Substrate

11‧‧‧Black frame

12‧‧‧Running area

21‧‧‧First sensing line

22‧‧‧Second sensing line

210‧‧‧First sensing electrode

220‧‧‧Second sensing electrode

30‧‧‧Insulation

52‧‧‧Bridge

54‧‧‧Signal lines

Claims (6)

A frameless touch panel comprising: a substrate having a surface on a side of the opposite side of the surface covered with a black frame layer, and the other opposite sides of the surface are maintained without covering the black frame layer Forming a frameless substrate, wherein at least one side of the uncovered black frame layer is used as a running line area; an electrode pattern layer is disposed on the surface of the substrate and includes an arrangement extending along the first axial direction a plurality of first sensing lines and a plurality of second sensing lines extending along the second axial direction, wherein the first sensing line and the second sensing line are insulated and staggered; and a circuit layer comprising a plurality of bridges And a plurality of signal lines, the plurality of bridges are disposed on the electrode pattern layer, and the plurality of signal lines are electrically connected to the first sensing line and the second sensing line and extend in the running line area, wherein A blackening film is disposed between each bridge and the substrate, and a blackening film is also disposed between each signal line and the substrate. The frameless touch panel according to claim 1, wherein the blackening film between the bridge and the substrate has a shape conforming to the bridge; the blackening film between the signal lines and the substrate has a shape conforming to the signal line. . The frameless touch panel of claim 2, wherein the blackening film disposed between each signal line and the substrate is disposed on a surface of the substrate, and each signal line is overlapped with the corresponding blackened film. surface. The touch-free panel of claim 3, wherein each of the first sensing circuits includes a plurality of first sensing electrodes electrically connected; each of the second sensing circuits includes a plurality of second sensing electrodes An insulating layer is extended between the two adjacent second sensing electrodes; wherein the blackening film disposed between each of the bridges and the substrate is disposed on a surface of the insulating layer, and each of the bridges is provided Two adjacent second sensing electrodes are electrically connected to the surface of the blackened film. The frameless touch panel of claim 3 or 4, wherein the substrate has opposite short sides and opposite long sides, wherein the black frame layer covers opposite short sides of the surface of the substrate; The opposite long sides of the substrate are maintained without a black frame layer. The frameless touch panel of claim 5, wherein the bridge is a metal bridge, and the signal line is a metal signal line.