| Title: |
SINGLE LAYER IMPLEMENTED TWO DIMENSIONAL TOUCHPAD |
| Document Number: |
20120075215 |
| Publication Date: |
March 29, 2012 |
| Appl. No: |
13/231086 |
| Application Filed: |
September 13, 2011 |
| Abstract: |
A single-layer implemented two-dimensional touchpad includes two groups of sensing units arranged abreast along two directions, respectively. The first group of sensing units have one end adjacent to the connection region of the touchpad and are connected with wires routing to the connection region. The second group of sensing units are connected with wires bypassing the first group of sensing units and routing to the connection region. This arrangement decreases the number of wires routing through the margin of the circuit board of the touchpad to downsize the margin width and reduce the limitation to the touchpad size simultaneously, only by changing the layout of the sensing units, without increasing the manufacturing mask and steps. |
| Inventors: |
YEH, I-HAU (TAIPEI CITY, TW) |
| Assignees: |
ELAN MICROELECTRONICS CORPORATION (HSINCHU, TW) |
| Claim: |
1. A single-layer implemented two-dimensional touchpad comprising: a connection region; a first group of sensing units arranged abreast along a first direction, each having one end adjacent to the connection region and connected with wires routing to the connection region; and a second group of sensing units arranged abreast along a second direction, and connected with wires bypassing the first group of sensing units and routing to the connection region. |
| Claim: |
2. The touchpad of claim 1, wherein each of the first and second groups of sensing units is composed of a pair of sensing electrodes for defining a position when being touched. |
| Claim: |
3. The touchpad of claim 2, wherein each pair of the sensing electrodes have a face-to-face wedged shape. |
| Claim: |
4. The touchpad of claim 2, wherein each of the sensing electrodes is formed with holes arranged in a progressively decreased density. |
| Claim: |
5. The touchpad of claim 2, wherein each of the sensing electrodes is made of metal. |
| Claim: |
6. The touchpad of claim 2, wherein each of the sensing electrodes is made of ITO. |
| Claim: |
7. The touchpad of claim 1, wherein each of the wires is made of metal. |
| Claim: |
8. The touchpad of claim 1, wherein each of the wires is made of ITO. |
| Current U.S. Class: |
345/173 |
| Current International Class: |
06 |
| Accession Number: |
edspap.20120075215 |
| Database: |
USPTO Patent Applications |
