JP3183453U - Double-sided touch panel with double side lamination - Google Patents

Abstract

Provided is a double-sided lamination touch panel that not only can reduce resistance but also does not increase the number of connection pads and the area of a flexible printed circuit board.
A plurality of first electrode rows 31A are formed on a transparent substrate. A plurality of pairs of connection pads 34A correspond to the first electrode row, and each pair of connection pads includes a first connection pad 341A and a second connection pad 342A that are cut off from each other. A first end of the first electrode row is connected to a corresponding first connection pad by a corresponding first trace 32A, and a second end of the first electrode row is connected to a corresponding second connection pad by a corresponding second trace 33A. Is done.
[Selection] Figure 4B

Description

  The present invention relates to a touch panel with double-sided lamination.

  A touch display is an input / output device manufactured by combining detection technology and display technology, and is used universally in electronic devices such as portable and handheld devices.

  A capacitive touch panel is a commonly used touch panel that detects a touch position using a capacitive coupling effect. When the finger touches the surface of the capacitive touch panel, the touch position can be detected by changing the capacitance at the corresponding position.

Taiwan Application Patent No. M364913

However, the conventional techniques described above have the following problems.
FIG. 1A shows a schematic diagram of a known touch panel, which is disclosed in “Panel Touch Panel Circuit that Prevents Signal Attenuation” in Patent Document 1. A known touch panel is mainly composed of an electrode array 11A in the vertical axis direction and an electrode array 11B in the horizontal axis direction. In order to prevent signal attenuation due to excessive resistance, both ends of electrode rows 11A and 11B are connected together by conductors 12 and 13, respectively, as in the simplified diagram of a single electrode row shown in FIG. 1B. Then, it is further connected to the connection pad 14. Although the configuration shown in FIGS. 1A / B can reduce the resistance, it is inconvenient to measure the resistance and capacitance of the touch panel with an ohmmeter / capacitance meter (RC meter).

FIG. 2A also shows a schematic diagram of a known touch panel, which is disclosed in Patent Document 1 described above. FIG. 2B shows the single electrode array 11A / B of FIG. 2A. 1A / B is different from FIG. 1A / B in that both ends of the electrode array 11A / B are connected to connection pads 14A and 14B by conductors 12 and 13, respectively, and the two connection pads 14A and 14B are electrically connected by another conductor 15. Is to connect to.
The number of connection pads 14A and 14B used in the configuration of FIGS. 2A / B is twice that of the configuration shown in FIG. 1A / B, which increases the area of the flexible printed circuit board 2 and reduces the cost. Accordingly, the space required for designing the structure is greatly limited.

  Therefore, the present inventor considered that the above-described drawbacks can be improved, and as a result of intensive studies, the present inventor has arrived at a proposal of the present invention that effectively improves the above-described problems with a rational design.

  The present invention has been made in view of such conventional problems. In order to solve the above problems, the main object of the present invention is to provide a double-sided lamination touch panel capable of reducing the resistance on the premise that the number of connection pads and the area of connection members are not increased.

  In addition, the touch panel can be provided with dummy traces and dummy connection pads that are not specified, thereby preventing signal interference and electrical shorts.

  In order to solve the above-described problems and achieve the object, a double-sided lamination touch panel according to the present invention includes a transparent substrate, a plurality of first electrode rows formed on the transparent substrate, and the first electrode rows, respectively. Corresponding to each of the first connection pad and the second connection pad, a plurality of pairs of connection pads that are cut off from each other, and a plurality of first traces respectively corresponding to the first electrode row, A first end of the first electrode row connected to the corresponding first connection pad by the corresponding first trace, and a plurality of second traces respectively corresponding to the first electrode row, The second end of the first electrode row is connected to the corresponding second connection pad by the corresponding second trace.

  According to the present invention, it is possible to obtain a double-sided lamination touch panel that not only can reduce resistance but also does not increase the number of connection pads and the area of a flexible printed circuit board.

It is the schematic of a well-known touch panel. 1B is a single electrode array of FIG. 1A. It is the schematic of another well-known touch panel. 2B is a single electrode row of FIG. 2A. It is the schematic of the touch panel of the double-sided lamination in 1st Embodiment which concerns on this invention. It is the single 1st electrode row | line | column of FIG. 3A. It is the schematic of the touch panel of the double-sided lamination in 2nd Embodiment which concerns on this invention. 4B is a single first electrode row of FIG. 4A. 4B is a single second electrode array of FIG. 4A. FIG. 4B is a simplified block diagram of the touch panel of FIG. 4A. A dummy connection pad and a general connection pad.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.
First, a first embodiment of a double-sided lamination touch panel according to the present invention will be described.

FIG. 3A shows a schematic diagram of a touch panel 300 of double side lamination according to the first embodiment of the present invention.
In the present embodiment, the touch panel 300 includes a plurality of first electrode rows 31 (six first electrode rows 31 are illustrated in FIG. 3A) and is formed on the transparent substrate 3 substantially in parallel with each other. The material of the transparent substrate 3 is an insulating material such as glass, photosensitive material, or polyethylene terephthalate (PET), but is not limited thereto. A plurality of first traces 32, a plurality of second traces 33, and a plurality of pairs of connecting pads 34 are formed on the transparent substrate 3 and correspond to the first electrode rows 31, respectively.
Each pair of connection pads 34 includes a first connection pad 341 and a second connection pad 342, and the distance between the two can be adjusted according to use needs. In the embodiment, the distance between the first connection pad 341 and the second connection pad 342 is 10-40 microns, but 20 microns is preferable.
Specifically, the first end 311 of the first electrode row 31 is connected to the first connection pad 341 by the first trace 32, and the second end 312 of the first electrode row 31 is connected to the second connection pad 342 by the second trace 33. Connected to.

FIG. 3B shows one first electrode row 31 in FIG. 3A and the corresponding first trace 32, second trace 33, first connection pad 341, and second connection pad 342.
In FIG. 3B, a connecting member 4 such as a flexible printed circuit board (FPC) that includes a plurality of bonding pads 41 and corresponds to the connection pads 34 is shown. When the bonding pad 41 and the connection pad 34 are laminated facing each other, the first connection pad 341 and the second connection pad 342 are electrically connected.

Based on the touch panel 300 disclosed in FIGS. 3A and 3B, the first trace 32 and the second trace 33 can form a double-sided configuration, and the overall resistance of the first electrode row 31 can be reduced. The connection between the first connection pad 341 and the second connection pad 342 is blocked until the connection member 4 is laminated. Therefore, the resistance and capacitance of the touch panel 300 are measured with a resistance meter / capacitance meter (RC meter). It is suitable for testing the touch panel 300 with a measuring device.
On the other hand, in known touch panels (eg, FIG. 1A and FIG. 1B), since the traces at both ends of the electrode array are electrically connected before the flexible circuit board is laminated, resistance and static The capacity cannot be measured.

Further, when the connection pad 34 of this embodiment is laminated with the bonding pad 41, the first trace 32 and the second trace 33 at both ends of the first electrode row 31 are electrically connected, and the signal of the touch panel 300 is transmitted by the connection member 4. It can be transmitted to a control device (not shown).
Compared to a known touch panel (example: FIGS. 2A / B), the number of connection pads 34 used in the present embodiment is only half that of a known touch panel, so the area of the connection member 4 can be reduced. Not only can costs be reduced, but the process can be simplified to provide more space for structural design.

  Next, a second embodiment of the double-sided lamination touch panel of the present invention will be described.

The configuration of the second embodiment of the present invention is shown in FIGS. 4A to 5. FIG. 4A is a schematic view of a touch panel 400 for double-sided lamination according to the second embodiment of the present invention.
The difference from the first embodiment is that, in this embodiment, in addition to forming a plurality of first electrode rows 31A (in the vertical direction), a plurality of second electrode rows 31B (in the horizontal direction) are formed. is there. In addition, an insulating block 30 is provided at a connection portion between the first electrode row 31A and the second electrode row 31B, and the first electrode row 31A and the second electrode row 31B are electrically insulated from each other.
The first electrode row 31A and the second electrode row 31B are substantially vertical, but are not limited thereto. Each first electrode row 31A includes a plurality of first electrodes 310A (eg, six rhombus electrodes connected in series are shown) connected in series, and each second electrode row 31B is a plurality of second electrodes connected in series. Two electrodes 310B (eg, seven rhombus electrodes connected in series are shown).

4B shows one first electrode row 31A in FIG. 4A and the corresponding first trace 32A, second trace 33A, and connection pad 34A (including the first connection pad 341A and the second connection pad 342A). .
4C shows one second electrode row 31B in FIG. 4A and the corresponding first trace 32B, second trace 33B, and connection pad 34B (including the first connection pad 341B and the second connection pad 342B). It is.

FIG. 5 is a simplified block diagram of the touch panel 400 of FIG. 4A.
The first electrode row 31A and the second electrode row 31B are in the touch active region 51, and have X traces (corresponding to the first trace 32A and the second trace 33A of the first electrode row 31A) on the upper and lower sides, respectively. Constructs a double-sided type. Y-traces (corresponding to the first trace 32B and the second trace 33B of the second electrode row 31B) are respectively provided on the left and right sides of the touch active area 51, and a double-sided type is also formed.
In this specification, the X trace is also referred to as a first axial trace, and the Y trace is also referred to as a second axial trace. FIG. 5 further shows a dummy trace 52 provided between the X and Y traces to reduce interference between signals.

  Based on another feature of the present embodiment, between the connection pads 34A / B or between the connection pads 34A / B and the power supply pad (eg, GND), as shown in FIG. A (dummy) connection pad 35 can be provided. When the connection pad 34A / B and the connection member 4 are laminated, the dummy connection pad 35 can prevent an electrical short circuit between the connection pad 34A / B or between the connection pad 34A / B and the power supply pad.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration of the present invention is not limited to this embodiment, and includes design changes and the like without departing from the scope of the present invention. It is.

2 Flexible printed circuit board 11A Vertical electrode row 11B Horizontal axis electrode row 12 Conductor 13 Conductor 14 Connection pad 15 Conductor 300 Touch panel 400 Touch panel 3 Transparent substrate 30 Insulating blocks 31, 31A, 31B First electrode array 310A First electrode 310B Second electrode 311 First end 312 Second end 32, 32A, 32B First trace 33, 33A, 33B Second trace 34, 34A, 34B Connection pad 341, 341A, 341B First connection pad 342, 342A , 342B Second connection pad 35 Dummy connection pad 4 Connection member 41 Bond pad 51 Touch active area 52 Dummy trace

Claims (6)

A transparent substrate;
A plurality of first electrode rows formed on the transparent substrate;
A plurality of pairs of connection pads, each pair consisting of a first connection pad and a second connection pad, corresponding to the first electrode row, which are cut off from each other;
A plurality of first traces each corresponding to the first electrode row, wherein a first end of the first electrode row is connected to the corresponding first connection pad by the corresponding first trace;
A plurality of second traces each corresponding to the first electrode row, wherein a second end of the first electrode row is connected to the corresponding second connection pad by the corresponding second trace;
A touch panel with double-sided lamination.   The touch panel for double-sided lamination according to claim 1, further comprising a connection member including a plurality of bonding pads and corresponding to each of the connection pads.   And a plurality of second electrode rows formed on the transparent substrate, the second electrode rows being connected to the corresponding first connection pads by the corresponding first traces, and the corresponding second electrode rows. The touch panel for double-sided lamination according to claim 1, wherein the touch panel is connected to the corresponding second connection pad by a trace.   4. Each of the first electrode rows includes a plurality of first electrodes connected in series, and each of the second electrode rows includes a plurality of second electrodes connected in series. Touch panel with double-sided lamination.   Further, a dummy trace provided between the first axial trace and the second axial trace is provided, and the first axial trace is a first trace and a second trace of the first electrode row. The touch panel for double-sided lamination according to claim 3, wherein the trace in the second axial direction is composed of a first trace and a second trace of the second electrode row.   The touch panel for double-sided lamination according to claim 1, further comprising at least one dummy connection pad provided between the connection pads or between the connection pad and a power supply pad.

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