Self-capacitive touch panel and conductive layer structure thereof

• US 9,645,684 B2
• Filed: 11/21/2014
• Issued: 05/09/2017
• Est. Priority Date: 11/18/2014
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chang, Chun-kai
• Primary Examiner(s): Watko, Julie Anne
• Application Number:
  US14/407,459
• Publication Number:
  US 20160349869A1
• Time in Patent Office: 900 Days
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A self-capacitive touch panel and a conductive layer structure thereof are provided. The conductive layer structure includes multiple rectangular first electrode patterns, multiple second electrode patterns and multiple peripheral wires correspondingly connected with the first electrode patterns and the second electrode patterns. The first electrode patterns are arranged in a matrix. Neighboring two rows of first electrode patterns have at least two second electrode patterns disposed therebetween, and the second electrode patterns located at a same row have widths gradually decreased or increased along row direction and thereby together form a rectangular shape as a whole. By the above described manner, the invention can accurately determine actual touch points.

Claims

1. A conductive layer structure comprising:

a plurality of rectangular first electrode patterns, a plurality of second electrode patterns and a plurality of peripheral wires correspondingly electrically connected with the plurality of first electrode patterns and the plurality of second electrode patterns;

wherein the plurality of first electrode patterns are arranged in a two-dimensional matrix, and multiple first electrode patterns located at a same row of the matrix form one first electrode pattern group such that the plurality of first electrode patterns located at different rows of the matrix form multiple first electrode pattern groups;

each neighboring two of the first electrode pattern groups have two second electrode patterns disposed therebtween, the two second electrode patterns form one second electrode pattern group such that the plurality of second electrode patterns form multiple second electrode pattern groups alternately arranged with the first electrode pattern groups along column direction of the matrix;

one of the two second electrode patterns has a width gradually decreased along row direction of the matrix, the other of the two second electrode patterns has a width gradually increased along the row direction of the matrix, and thereby the two second electrode patterns together form a rectangular shape as a whole;

wherein the first electrode patterns located at a same column of the matrix are electrically connected to a same one of the plurality of peripheral wires, the conductive layer structure further comprises an auxiliary electrode pattern disposed at an edge position outside a coverage area of the plurality of first electrode patterns and the plurality of second electrode patterns.

2. The conductive layer structure as claimed in claim 1, wherein the two second electrode patterns are two centrosymmetric electrode patterns of right-angled triangle or right-angled trapezoid.

3. The conductive layer structure as claimed in claim 1, wherein the auxiliary electrode pattern is a rectangle electrode pattern.

4. A conductive layer structure comprising:

a plurality of rectangular first electrode patterns, a plurality of second electrode patterns and a plurality of peripheral wires correspondingly electrically connected with the plurality of first electrode patterns and the plurality of second electrode patterns;

wherein the plurality of first electrode patterns are arranged in a two-dimensional matrix, and multiple first electrode patterns located at a same row of the matrix form one first electrode pattern group such that the plurality of first electrode patterns located at different rows of the matrix form multiple first electrode pattern groups;

each neighboring two of the first electrode pattern groups have at least two second electrode patterns disposed therebtween, the at least two second electrode patterns form one second electrode pattern group such that the plurality of second electrode patterns form multiple second electrode pattern groups alternately arranged with the first electrode pattern groups along column direction of the matrix;

the at least two second electrode patterns of each second electrode pattern group have widths gradually decreased or increased along row direction of the matrix and thereby together form a rectangular shape as a whole.

5. The conductive layer structure as claimed in claim 4, wherein the first electrode patterns located at a same column of the matrix are electrically connected to a same one of the plurality of peripheral wires.

6. The conductive layer structure as claimed in claim 4, wherein each neighboring two of the first electrode pattern groups have two second electrode patterns disposed therebetween as one second electrode pattern group, one of the two second electrode patterns has a width gradually decreased along the row direction of the matrix, and the other of the two second electrode patterns has a width gradually increased along the row direction of the matrix.

7. The conductive layer structure as claimed in claim 6, wherein the two second electrode patterns are two centrosymmetric electrode patterns of right-angled triangle or right-angled trapezoid.

8. The conductive layer structure as claimed in claim 4, wherein each neighboring two of the first electrode pattern groups have three second electrode patterns disposed therebetween as one second electrode pattern group, the three second electrode patterns are staggeredly arranged along column direction of the matrix, one of the three second electrode patterns which is located at the middle has a width gradually decreased along the row direction of the matrix, and two of the three second electrode patterns which are located at two sides have widths gradually increased along the row direction of the matrix.

9. The conductive layer structure as claimed in claim 8, wherein along the row direction of the matrix, changes of the widths of the three second electrode patterns as one second electrode pattern group are reverse to changes of the widths of the three second electrode patterns as neighboring one second electrode pattern group.

10. The conductive layer structure as claimed in claim 8, wherein the one of the three second electrode patterns which is located at the middle is an electrode pattern of isosceles triangle or isosceles trapezoid, the two of the three second electrode patterns which are located at the two sides are electrode patterns of right-angled triangle or right-angled trapezoid.

11. The conductive layer structure as claimed in claim 4, wherein the conductive layer structure further comprises an auxiliary electrode pattern, and the auxiliary electrode pattern is disposed at an edge position outside a coverage area of the plurality of first electrode patterns and the plurality of second electrode patterns.

12. The conductive layer structure as claimed in claim 11, wherein the auxiliary electrode pattern is a rectangle electrode pattern.

13. A self-capacitive touch panel comprising a signal detector, a processor and a conductive layer structure;

the signal detector being connected with a plurality of peripheral wires and for detecting capacitive touch control signals on row direction and on column direction, the processor being connected with the signal detector and for determining actual touch points in a multi-touch event according to the capacitive touch control signals;

the conductive layer structure comprising a plurality of rectangular first electrode patterns, a plurality of second electrode patterns and the plurality of peripheral wires correspondingly electrically connected with the plurality of first electrode patterns and the plurality of second electrode patterns;

wherein the plurality of first electrode patterns are arranged in a two-dimensional matrix, and multiple first electrode patterns located at a same row of the matrix form one first electrode pattern group such that the plurality of first electrode patterns located at different rows of the matrix form multiple first electrode pattern groups;

each neighboring two of the first electrode pattern groups have at least two second electrode patterns disposed therebtween, the at least two second electrode patterns form one second electrode pattern group such that the plurality of second electrode patterns form multiple second electrode pattern groups alternately arranged with the first electrode pattern groups along column direction of the matrix;

the at least two second electrode patterns of each second electrode pattern group have widths gradually decreased or increased along the row direction of the matrix and thereby together form a rectangular shape as a whole.

14. The self-capacitive touch panel as claimed in claim 13, wherein the first electrode patterns located at a same column of the matrix are electrically connected to a same one of the plurality of the peripheral wires.

15. The self-capacitive touch panel as claimed in claim 13, wherein each neighboring two of the first electrode pattern groups have two second electrode patterns disposed therebetween as one second electrode pattern group, one of the two second electrode patterns has a width gradually decreased along the row direction of the matrix, and the other of the two second electrode patterns has a width gradually increased along the row direction of the matrix.

16. The self-capacitive touch panel as claimed in claim 15, wherein the two second electrode patterns are centrosymmetric two electrode patterns of right-angled triangle or right-angled trapezoid.

17. The self-capacitive touch panel as claimed in claim 13, wherein each neighboring two of the first electrode pattern groups have three second electrode patterns disposed therebetween as one second electrode pattern group, the three second electrode patterns are staggeredly arranged along the column direction of the matrix, one of the three second electrode patterns which is located at the middle has a width gradually decreased along the row direction of the matrix, and two of the three second electrode patterns which are located at two sides have widths gradually increased along the row direction of the matrix.

18. The self-capacitive touch panel as claimed in claim 17, wherein along the row direction of the matrix, changes of the widths of the three second electrode patterns as one second electrode pattern group are reverse to changes of the widths of the three second electrode patterns as neighboring one second electrode pattern group.

19. The self-capacitive touch panel as claimed in claim 17, wherein the one of the three second electrode patterns which is located at the middle is an electrode pattern of isosceles triangle or isosceles trapezoid, the two of the three second electrode patterns which are located at the two sides are electrode patterns of right-angled triangle or right-angled trapezoid.

20. The self-capacitive touch panel as claimed in claim 13, wherein the conductive layer structure further comprises an auxiliary electrode pattern, and the auxiliary electrode pattern is disposed at an edge position outside a coverage area of the plurality of first electrode patterns and the plurality of second electrode patterns.