MULTI-INDUCED TOUCHPAD

• US 20090315853A1
• Filed: 08/22/2008
• Published: 12/24/2009
• Est. Priority Date: 06/20/2008
• Status: Abandoned Application

• Current Assignee: Memsor Corporation
• Original Assignee: Sentrend Corporation
• Inventors: YANG, YAN-MEI, Shen, Chung-Yi
• Application Number:
  US12/196,285
• Publication Number:
  US 20090315853A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A multi-induced touchpad sequentially includes a protect layer, a first axis locus, an insulation layer, a multi-induced layer, a space dot layer, a conductive film and a substrate. The first axis locus layer has the first axis locus and the multi-induced layer has the second axis locus and a conductive circuit is provided at the first axis locus layer and the multi-induced layer respectively. The respective axis locus is intersected to each other and the conductive circuit is connected to the axis locus respectively for transmitting the conductive inducing signal to a subsequent signal processing component. The second axis locus has an electrical node at an end thereof and the conductive film has an electrical node thereon for connecting with a voltage source and a resistance calculation circuit such that the induced signal at the presses spot can be created and figured out.

Claims

1. A multi-induced touchpad comprising:

a protect layer, which is an insulation film;

a first axis locus layer having a first axis locus made with a good conductive rate and having a first locus node being disposed at an end of said first locus;

an insulation layer being an insulation film too;

a multi-induced layer having a second axis locus made with a good conductive rate and a first electrical node, and a second locus node being disposed at an end of said second locus;

a space dot layer being arranged with a plurality of space dots;

a conductive film made with a good conductive rate and having a second electrical node; and

a substrate made of an insulation material;

wherein, said protect layer, said first axis locus layer, said insulation layer, said multi-induced layer, said space dot layer, said conductive film and said substrate are stacked sequentially;

said first locus node and said second locus node are connected to a conducting circuit for transmitting a charge-inducing signal to a signal processing component; and

said first electrical node and said second electrical node are electrically connected to a voltage source and a resistance calculation circuit respectively.

2. The multi-induced touchpad as defined in claim 1, wherein said voltage source connected to said second electrical node offers a voltage difference between a first direction and a second direction, which are intersected each other;

said resistance calculation circuit figures out a resistance value of a pressed spot at said two directions respectively.

3. The multi-induced touchpad as defined in claim 1, wherein the voltage source of said second electrical node offers a voltage difference of said first direction and the resistance calculation circuit of said first electrical node figures out a resistance value of said pressed spot at said first direction;

the voltage source of said first electrical node offers the voltage difference of said second direction; and

resistance calculation circuit of said second electrical node figures out a resistance value of said pressed spot at said second direction.