Surface capacitive touch panel and electronic device

• US 9,122,360 B2
• Filed: 04/22/2010
• Issued: 09/01/2015
• Est. Priority Date: 04/23/2009
• Status: Active Grant

• Current Assignee: Lenovo Company Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Company Limited (Lenovo Group Ltd.)
• Inventors: Xu, Fang, Shang, Ke
• Primary Examiner(s): SPAR, ILANA L
• Application Number:
  US13/265,982
• Publication Number:
  US 20120044205A1
• Time in Patent Office: 1,958 Days
• Field of Search: 345/156, 345/173, 345/174, 178/18.01, 178 1805- 1807, 178 2001- 2004
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04113 Peripheral electrode pattern in resistive digitisers, i.e. electrodes at the periphery of the resistive sheet are shaped in patterns enhancing linearity of induced field
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

The invention provides a surface capacitive touch panel and an electronic device, said surface capacitive touch panel comprising: a resistive film, on which an electrode setting area divided into at least two layers is set; and a plurality of conductive electrodes, set in said electrode setting area; said plurality of conductive electrodes including at least one set of electrodes; wherein, said set of electrodes includes: a first strip electrode; a second strip electrode, in parallel with said first strip electrode, but in a different layer; a third strip electrode, in parallel with said first strip electrode, but in a different layer; said second strip electrode and said third strip electrode being located on the same side of said first strip electrode; a fourth strip electrode, both ends of which are connected with said first strip electrode and said second strip electrode, respectively; and a fifth strip electrode, both ends of which are connected with said first strip electrode and said third strip electrode, respectively. The invention enhances the linear degree of the electrical field applied to the resistive film, thereby enhancing the positioning accuracy.

Claims

1. A surface capacitive touch panel, comprising:

a resistive film, on which an electrode setting area divided into at least two layers is set; and

a plurality of conductive electrodes, set in said electrode setting area;

said plurality of conductive electrodes including at least one set of electrodes;

wherein, said set of electrodes includes;

a first strip electrode;

a second strip electrode, in parallel with said first strip electrode, but in a different layer;

a third strip electrode, in parallel with said first strip electrode, but in a different layer;

said second strip electrode and said third strip electrode being located on the same side of said first strip electrode;

a fourth strip electrode, wherein a first end of the fourth strip electrode is directly connected to said first strip electrode and a second end of the fourth strip electrode is directly connected to said second strip electrode so that the fourth strip electrode passes through an adjacent layer to the first strip electrode;

a fifth strip electrode, wherein a first end of the fifth strip electrode is directly connected with said first strip electrode and a second end of the fifth strip electrode is directly connected to said third strip electrode so that the fifth strip electrode passes through an adjacent layer to the first strip electrode,

wherein said second strip electrode and said third strip electrode are not in the layer adjacent to said first strip electrode, wherein there is only a portion of the fourth strip electrode arranged perpendicular to the adjacent layer to the first strip electrode in the adjacent layer, and wherein a distance between the first strip electrode and a touch area of the surface capacitive touch panel is greater than a distance between either of the second strip electrode and the third strip electrode and the touch area, and, in connections formed by the fourth and fifth strip electrodes, and the second and third strip electrodes, there is at least one “

”

shaped connection.

2. The surface capacitive touch panel according to claim 1, wherein, said second strip electrode and said third strip electrode are located in the same layer.

3. The surface capacitive touch panel according to claim 1, wherein, said set of electrodes has an axially-symmetric structure.

4. The surface capacitive touch panel according to claim 1, wherein, said second strip electrode and said third strip electrode have the same length.

5. The surface capacitive touch panel according to claim 1, wherein, said second strip electrode is axially-symmetric with respect to a straight line where the fourth strip electrode is located, and said third strip electrode is axially-symmetric with respect to a straight line where the fifth strip electrode is located.

6. An electronic device, including a circuit board and a surface capacitive touch panel, said surface capacitive touch panel comprising:

a resistive film, on which an electrode setting area divided into at least two layers is set; and

a plurality of conductive electrodes, set in said electrode setting area;

said plurality of conductive electrodes including supply electrode;

said plurality of conductive electrodes including a at least one set of electrodes;

wherein, said set of electrodes includes;

a first strip electrode;

a second strip electrode, in parallel with said first strip electrode, but in a different layer;

a third strip electrode, in parallel with said first strip electrode, but in a different layer;

said second strip electrode and said third strip electrode being located on the same side of said first strip electrode;

a fourth strip electrode, wherein a first end of the fourth strip electrode is directly connected to said first strip electrode and a second end of the fourth strip electrode is directly connected to said second strip electrode so that the fourth strip electrode passes through an adjacent layer to the first strip electrode;

a fifth strip electrode, wherein a first end of the fifth strip electrode is directly connected with said first strip electrode and a second end of the fifth strip electrode is directly connected to said third strip electrode so that the fifth strip electrode passes through an adjacent layer to the first strip electrode; and

a touch panel driving module, connected with said supply electrode and said board,

wherein said second strip electrode and said third strip electrode are not in the layer adjacent to said first strip electrode, wherein there is only a portion of the fourth strip electrode arranged perpendicular to the adjacent layer to the first strip electrode in the adjacent layer, wherein the fourth strip electrode is located in at least one layer other than a layer of the first strip electrode, the adjacent layer, and a layer of the second strip electrode, and wherein a distance between the first strip electrode and a touch area of the surface capacitive touch panel is greater than a distance between either of the second strip electrode and the third strip electrode and the touch area, and, in connections formed by the fourth and fifth strip electrodes, and the second and third strip electrodes, there is at least one “

”

shaped connection.

7. The electronic device according to claim 6, wherein, said second strip electrode and said third strip electrode are located in the same layer.

8. The electronic device according to claim 6, wherein, said set of electrodes has an axially-symmetric structure.

9. The electronic device according to claim 6, wherein, said second strip electrode and said third strip electrode have the same length.

10. The electronic device according to claim 6, wherein, said second strip electrode is axially-symmetric with respect to a straight line where the fourth strip electrode is located, and said third strip electrode is axially-symmetric with respect to a straight line where the fifth strip electrode is located.

11. The electronic device according to claim 6, wherein, said surface capacitive touch panel is a wide touch panel.