# US 10,481,706 B2 · Touch panel

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- Number: US 10,481,706 B2
- Document ID: US10481706B2
- Status: Granted
- Kind: B2
- Application number: 13/650,146
- Filed: 2012-10-12
- Published: 2013-04-18
- Granted: 2019-11-19
- Earliest claimed: 2011-10-13
- Assignees: TPK Holding Co., Ltd.
- Applicants: Tpk Holding Co., Ltd.
- Inventors: Di-Shing Tsai; Chia-Ching Lu; Jui-Wen Wu; Ping-Wen Huang; Peng-Chih Yu; Su-Ming Lin
- Web page: https://patentgrep.com/patent/US10481706B2

## CPC

- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A touch panel including a touch region, a border region, a signal transmission device, and a light transmission pattern is provided. The border region is disposed on at least one side of the touch region. The signal transmission device is disposed in the border region. The light transmission pattern is disposed in the border region. The light transmission pattern partially overlaps the signal transmission device along a vertical projection direction. The signal transmission device includes at least one transparent conducting line. The transparent conducting line overlaps partial the light transmission pattern in the vertical projection direction.

## Claims

### Claim 1

A touch panel, comprising:
a touch region;
a border region disposed outside said touch region;
a signal transmission device disposed in said border region, said signal transmission device comprising at least one heterogeneous conducting line outside said touch region; and
a light transmission pattern disposed in said border region and partially overlapping said signal transmission device along a vertical projection direction;
wherein said heterogeneous conducting line comprises at least one transparent conducting line overlapping partial said light transmission pattern along said vertical projection direction, said heterogeneous conducting line further comprises at least one opaque conducting line, said transparent conducting lines are electrically connected to said opaque conducting line, and said heterogeneous conducting line does not generate a touch signal by itself.

### Claim 2 (depends on 1)

The touch panel of claim 1, further comprising a plurality touch units disposed in said touch region and partial said border region, wherein said signal transmission device is electrically connected to said touch units.

### Claim 3 (depends on 1)

The touch panel of claim 1, wherein said opaque conducting line comprises metal conducting lines, printing silver paste or printing carbon paste.

### Claim 4 (depends on 1)

The touch panel of claim 1, further comprising a transparent dummy line disposed in said border region and overlapping partial said light transmission pattern along said vertical projection direction.

### Claim 5 (depends on 4)

The touch panel of claim 4, wherein said transparent dummy line is electrically isolated from said signal transmission device.

### Claim 6 (depends on 4)

The touch panel of claim 4, wherein said transparent conducting line and said transparent dummy line are made of a patterned transparent conducting layer.

### Claim 7 (depends on 6)

The touch panel of claim 6, wherein a material of said patterned transparent conducting layer comprises indium tin oxide (ITO), indium zinc oxide (IZO) or aluminum zinc oxide (AZO).

### Claim 8 (depends on 1)

The touch panel of claim 1, wherein said light transmission pattern is a function indicating pattern.

### Claim 9 (depends on 1)

The touch panel of claim 1, wherein said light transmission pattern is a logo.

### Claim 10 (depends on 1)

The touch panel of claim 1, wherein said light transmission pattern comprises a decorative pattern.

### Claim 11 (depends on 10)

The touch panel of claim 10, wherein said decorative pattern is a Bluetooth logo or a WIFI wireless logo.

### Claim 12 (depends on 1)

The touch panel of claim 1, wherein the resistivity of said opaque conducting line is substantially lower than that of said transparent conducting lines for reducing the impedance of said signal transmission device.

### Claim 13 (depends on 1)

The touch panel of claim 1, wherein said opaque conducting line is electronically connected said transparent conducting line of same length for achieving equal resistance.