Capacitive touch panel with improved electrode patterns

• US 20070247437A1
• Filed: 04/20/2006
• Published: 10/25/2007
• Est. Priority Date: 04/20/2006
• Status: Abandoned Application

• Current Assignee: DanoTech Co., Ltd.
• Original Assignee: DanoTech Co., Ltd.
• Inventors: Ku, Fu-Tien, Liao, Peter
• Application Number:
  US11/409,425
• Publication Number:
  US 20070247437A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A capacitive touch panel with improved electrode patterns includes an insulating substrate, a conductive layer formed on a surface of the insulating substrate, and an electrode pattern formed on the surface of the conductive layer and disposed along the edges of the touch panel, and the electrode pattern includes a plurality of conductive silver circuits, and any row of the conductive silver circuits has a plurality of electrodes with equal length and equidistant from each other. The quantity of electrodes in each row of the conductive silver circuits is redesigned and any two adjacent conductive silver circuits are installed at corresponding positions with each other, so as to improve the linear response of an electric field and reduce the width of an electrode pattern.

Claims

1. A capacitive touch panel with improved electrode patterns, comprising:

an insulating substrate;

a conductive layer, formed on the surface of said insulating substrate; and

an electrode pattern, formed on the surface of said conductive layer and disposed along the edges of said touch panel, and said electrode pattern further comprising a plurality of rows of conductive silver circuits, and any one row of said conductive silver circuits including a plurality of electrodes with equal length and equidistant with each other, and the total number of rows of said conductive silver circuits is X, and said conductive silver circuits are named as Ln(n=1˜

X) sequentially from a position proximate to the center of said touch panel towards the direction away from the center of said touch panel, and the quantity of electrodes N of any row of said conductive silver circuits is determined by Formulas (1) to (4) as follows;

for Ln=1, the quantity of conductive silver circuits N=2(X−

n+2)+3 

 

(Formula

     1);


for Ln=2, the quantity of conductive silver circuits N=2(X−

n+3)+1 

 

(Formula

     2);


for Ln=3, the quantity of conductive silver circuits N=2(X−

n+2)+3 

 

(Formula

     3); and


for Ln=4, the quantity of conductive silver circuits N=2(X−

n+3)−

1 

 

(Formula

     4).

2. The capacitive touch panel with improved electrode patterns of claim 1, wherein said electrode pattern has a width less than 2.8 mm.

3. The capacitive touch panel with improved electrode patterns of claim 1, wherein any one row of said conductive silver circuits has a quantity of electrodes N determined by Formulas (5) to (8) as follows:

for Ln=1, the quantity of conductive silver circuits N=(2(X−

n+2)/2)+1 

 

(Formula

     5);


for Ln=2, the quantity of conductive silver circuits N=(2(X−

n+3)/2)−

1 

 

(Formula

     6);


for Ln=3, the quantity of conductive silver circuits N=(2(X−

n+2)/2)+1 

 

(Formula

     7); and


for Ln=4, the quantity of conductive silver circuits N=(2(X−

n+3)/2)−

1 

 

(Formula

     8).