CAPACITIVE TOUCH PANEL

• US 20120146937A1
• Filed: 09/22/2011
• Published: 06/14/2012
• Est. Priority Date: 12/14/2010
• Status: Abandoned Application

• Current Assignee: Derlead Investment, Ltd.
• Original Assignee: Derlead Investment, Ltd.
• Inventors: HSU, Jane
• Application Number:
  US13/240,666
• Publication Number:
  US 20120146937A1
• 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

Abstract

A capacitive touch panel has an. X-axis sensing layer and a Y-axis sensing layer. The X-axis and Y-axis sensing layers respectively have multiple sensing rows and sensing columns. Each sensing row or sensing column has multiple X-axis or Y-axis electrode strings. Each X-axis or Y-axis electrode string has multiple X-axis electrodes or Y-axis electrodes serially connected. The X-axis electrode strings or Y-axis electrode strings are connected in parallel with each other. The Y-axis electrodes are alternately or directly aligned with the X-axis electrodes. With the foregoing design, the resistance of each row and column can be effectively reduced so as to raise the reading sensitivity of a controller and maintain uniform internal resistance for each sensing row and column to facilitate enlargement of the capacitive touch panel.

Claims

1. A capacitive touch panel comprising:

an X-axis sensing layer having multiple sensing rows, wherein each sensing row has;

an X-axis driving line formed on one end of the sensing row; and

multiple X-axis electrode strings connected in parallel with each other,

wherein each X-axis electrode string has multiple X-axis electrodes serially connected, and the X-axis electrode of each X-axis electrode string in each sensing row adjacent to a corresponding X-axis driving line is connected to the X-axis driving line, and a selected one of the X-axis electrodes not directly connected to the X-axis driving line of the X-axis electrode string in the sensing row is connected to a selected one of the X-axis electrodes not directly connected to the X-axis driving line of each adjacent X-axis electrode string of the sensing row; and

a Y-axis sensing layer having multiple sensing columns, wherein each sensing column has;

a Y-axis driving line formed on one end of the sensing column; and

multiple Y-axis electrode strings connected in parallel with each other, wherein each Y-axis electrode string has multiple Y-axis electrodes serially connected, the Y-axis electrode of each Y-axis electrode string in each sensing column adjacent to a corresponding Y-axis driving line is connected to the Y-axis driving line, and a selected one of the Y-axis electrodes not directly connected to the Y-axis driving line of the Y-axis electrode string in the sensing column is connected to a selected one of the Y-axis electrodes not directly connected to the Y-axis driving line of each adjacent Y-axis electrode string of the sensing column, and a capacitor is formed between each Y-axis electrode and one of the X-axis electrodes.

2. The capacitive touch panel as claimed in claim 1, wherein the X-axis electrodes of the X-axis sensing layer are alternately aligned with the Y-axis electrodes of the Y-axis sensing layer to constitute a self capacitance projected capacitance touch panel.

3. The capacitive touch panel as claimed in claim 1, wherein the X-axis electrodes of the X-axis sensing layer are directly aligned with the Y-axis electrodes of the Y-axis sensing layer to constitute a mutual capacitance projected capacitance touch panel.

4. The capacitive touch panel as claimed in claim 2, wherein the X-axis sensing layer and the Y-axis sensing layer are simultaneously formed on one surface of a substrate.

5. The capacitive touch panel as claimed in claim 2, wherein the X-axis sensing layer and the Y-axis sensing layer are respectively formed on two opposite surfaces of two substrates.

6. The capacitive touch panel as claimed in claim 3, wherein the X-axis sensing layer and the Y-axis sensing layer are respectively formed on two opposite surfaces of two substrates.

7. The capacitive touch panel as claimed in claim 2, wherein the X-axis sensing layer and the Y-axis sensing layer are respectively formed on two opposite surfaces of a substrate.

8. The capacitive touch panel as claimed in claim 3, wherein the X-axis sensing layer and the Y-axis sensing layer are respectively formed on two opposite surfaces of a substrate.

9. The capacitive touch panel as claimed in claim 2, wherein each X-axis electrode of the X-axis sensing layer and each Y-axis electrode of the Y-axis sensing layer are rhombic.

10. The capacitive touch panel as claimed in claim 3, wherein each X-axis electrode of the X-axis sensing layer and each Y-axis electrode of the Y-axis sensing layer are rhombic.

11. The capacitive touch panel as claimed in claim 3, wherein each X-axis electrode of the X-axis sensing layer and each Y-axis electrode of the Y-axis sensing layer are rectangular.