Touch-sensitive device

• US 8,228,212 B2
• Filed: 08/27/2009
• Issued: 07/24/2012
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: KO JA (Cayman) Co., Ltd.
• Original Assignee: KO JA (Cayman) Co., Ltd.
• Inventors: Lin, Yu-Kai, Chen, Chih-Yung, Lin, Yi-Hung
• Primary Examiner(s): Nguyen, Khai M
• Application Number:
  US12/548,859
• Publication Number:
  US 20110050466A1
• Time in Patent Office: 1,062 Days
• Field of Search: 341 33- 34, 345/173, 178/18.06
• US Class Current: 341/33
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2017/9606 using one electrode only per touch switch
• CPC Class Codes: H03K 2217/960755 Constructional details of capacitive touch and proximity switches

Abstract

A touch-sensitive device includes a membrane substrate, an inductive layer and a protection layer. The inductive layer, arranged on a front face of the membrane substrate, has a plurality of capacitance-inductive sections, and at least one transmission line extended from a side of each of the capacitance-inductive sections. The protection layer is arranged on a front face of the inductive layer. A capacitance variation generated from the inductive section is in turn to output a signal to an electronic object via the transmission lines. After the signal is processed by the electronic object, a specific function is then executed.

Claims

1. A touch-sensitive device, arranged on an electronic object and electrically connected to a driving circuit, comprising:

a membrane substrate;

an inductive layer, which is arranged on a front face of the membrane substrate, and which has a plurality of capacitance-inductive sections, and at least one transmission line extended from a side of each of the capacitance-inductive sections; and

a protection layer, which is arranged on the inductive layer.

2. The touch-sensitive device according to claim 1, wherein the membrane substrate is made of a Polyethylene terephthalate (PET) material.

3. The touch-sensitive device according to claim 1, wherein the inductive layer is an electrically conductive ink.

4. The touch-sensitive device according to claim 1, wherein an operational panel is arranged on the protection layer.

5. The touch-sensitive device according to claim 4, wherein a plurality of pattern layers, corresponding to the inductive sections, are arranged on the operational layer.

6. A touch-sensitive device, arranged on an electronic object and electrically connected to a driving circuit, comprising:

an operational panel, on a front face of which a plurality of pattern layers are arranged;

an inductive layer, which is arranged on a back face of the operational panel, and which has a plurality of capacitance-inductive sections, and at least one transmission line extended from a side of each of the capacitance-inductive sections; and

a protection layer, which is arranged on the inductive layer.

7. The touch-sensitive device according to claim 6, wherein the operational panel is made of a Polyethylene terephthalate (PET) material.

8. The touch-sensitive device according to claim 6, wherein the inductive layer is an electrically conductive ink.