TOUCH PANEL WITH DISCONTINUOUS CHAIN OF RESISTANCES

• US 20100214263A1
• Filed: 02/17/2010
• Published: 08/26/2010
• Est. Priority Date: 02/20/2009
• Status: Active Grant

• Current Assignee: Higgstec, Inc.
• Original Assignee: Higgstec, Inc.
• Inventors: Chen, Yi-Ta, Yeh, Herng-Ming
• Granted Patent: US 8,242,877 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

The disclosure is related to a touch panel with discontinuous chain of resistances. It is formed by an internal series of electrodes of the conducting layer formed by a chain of discontinuous resistances. The design of the chain of discontinuous resistances can compensate for the voltage compensation by the voltage drop generated by the distance of chain of electrodes wherein the chain of discontinuous resistances is located at the interface of the series electrodes, and the length chain of discontinuous resistances is calculated by the specific equation.

Claims

1. A touch panel with discontinuous chain of resistances, comprising:

a substrate;

a conducting layer, formed on the substrate, the conducting layer comprises a internal contact area;

a plurality of corner electrodes, formed at the corners of the conducting layer;

a chain of series electrodes, comprising a plurality of electrodes formed on the edge of the conducting layer and connected to the plurality of corner electrodes, the plurality of corner electrodes generate a rectangular electrical field by performing bias voltage, each of the plurality of electrodes providing an internal part faced to the internal contact area and having a gap between each other; and

a discontinuous chain of resistances, comprising a plurality of discontinuous resistances, formed on the conducting layer, connected to the chain of series electrodes and arranged in parallel, the internal part of each of the plurality of electrodes is adjacent to at least one of the plurality of discontinuous resistances and the gap is electrical connected to the plurality of discontinuous resistances, the length of the plurality of discontinuous resistances Y is aX²+b, where “

a” and

“

b”

values are constant, the X is the number of the plurality of electrodes calculated from the plurality of corner electrodes which are connected to the chain of series electrodes.

2. The touch panel with discontinuous chain of resistances according to claim 1, wherein the “

b”

value is from 0.3 to 2 mm.

3. The touch panel with discontinuous chain of resistances according to claim 1, wherein the “

a”

value is determined by the length of a center electrode of the chain of series electrodes Ymax, the “

a”

is (Ymax−

b)/X².

4. The touch panel with discontinuous chain of resistances according to claim 1, wherein the “

a”

is determined by the length of a center electrode of the chain of series electrodes Ymax subtract 0.2 mm, the “

a”

is ((Ymax−

0.2)−

b)/X²

5. The touch panel with discontinuous chain of resistances according to claim 1, wherein the plurality of discontinuous resistances located at the gap corresponds to the center of the plurality of discontinuous resistances and the electrodes

6. The touch panel with discontinuous chain of resistances according to claim 1, wherein the plurality of corner electrodes and the chain of series electrodes are selected from the groups of silver conductor wires, molybdenum/aluminum/molybdenum metal layers and chromium conductor wires.

7. The touch panel with discontinuous chain of resistances according to claim 1, wherein the plurality of corner electrodes and the chain of series electrodes are the silver conductor wires which are fabricated by silver glue at a temperature above 500°

C.

8. The touch panel with discontinuous chain of resistances according to claim 1, wherein the discontinuous chain of resistances are comprised of the plurality of discontinuous and insulated segments formed on the conducting layer, and the plurality of discontinuous and insulated segments are arranged without chinks with the internal part of the chain of series electrodes.