TOUCH PAD

• US 20120090902A1
• Filed: 10/13/2010
• Published: 04/19/2012
• Est. Priority Date: 10/13/2010
• Status: Abandoned Application

• Current Assignee: Sunrex Technology Company Limited (Best Elite Holdings Limited)
• Original Assignee: Sunrex Technology Company Limited (Best Elite Holdings Limited)
• Inventors: Liu, Yung-Lung, Lin, Shih-Pin, Liao, Chun-Jung
• Application Number:
  US12/903,231
• Publication Number:
  US 20120090902A1
• Time in Patent Office: Days
• US Class Current: 178/18.03
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch pad includes a bottom substrate formed of plastic material; a second conduction layer adhered to the bottom substrate; a plurality of spaced pressing structures formed on the second conduction layer and each comprising a sensing layer adhered to the second conduction layer, a contact layer formed of flexible resistive or piezoelectric material and adhered to the sensing layer, and a connection layer adhered to the contact layer; a first conduction layer adhered to the pressing structures; and a top substrate formed of plastic material and adhered to the first conduction layer.

Claims

1. A touch pad comprising:

a bottom substrate formed of plastic material;

a second conduction layer adhered to the bottom substrate;

a plurality of spaced pressing structures formed on the second conduction layer and each of the pressing structures comprising a sensing layer adhered to the second conduction layer, a contact layer formed of flexible resistive or piezoelectric material and adhered to the sensing layer, and a connection layer adhered to the contact layer;

a first conduction layer adhered to the pressing structures; and

a top substrate formed of plastic material and adhered to the first conduction layer.

2. The touch pad of claim 1, further comprising a plurality of spacers each having a bottom adhered to the second conduction layer and a top secured to the first conduction layer by means of an adhesive layer, and wherein the spacers and the pressing structures are arranged transversely in alternating fashion.

3. The touch pad of claim 1, wherein the sensing layer is electrically connected to a controller.

4. The touch pad of claim 3, wherein the controller is further electrically connected to a loudspeaker, an LED (light-emitting diode), and/or a vibrator.

5. The touch pad of claim 1, further comprising a printing layer adhesively attached on the top substrate, the printing layer comprising a plurality of characters and/or numerals as virtual keys.

6. The touch pad of claim 5, wherein each character or numeral corresponds to at least one pressing structure.

7. The touch pad of claim 1, wherein the plastic material of each of the top and bottom substrates is PET (polyethylene terephthalate).

8. The touch pad of claim 1, wherein the sensing layer is formed of sensing material.