Capacitive touch panel, method of determining touch position and display device

• US 10,067,616 B2
• Filed: 07/28/2015
• Issued: 09/04/2018
• Est. Priority Date: 03/13/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: Wang, Wenlong, Ma, Tao, Huang, Yinhu
• Primary Examiner(s): Awad, Amr
• Assistant Examiner(s): Bray, Stephen
• Application Number:
  US14/810,773
• Publication Number:
  US 20160266678A1
• Time in Patent Office: 1,134 Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A capacitive touch panel, a method of determining touch position thereof and a display device are disclosed. The capacitive touch panel comprises a first substrate and a second substrate opposed to each other, the first substrate being provided with a black matrix. The black matrix is formed of a first metal touch electrode layer provided on a side of the first substrate away from the second substrate and a second metal touch electrode layer provided on a side of the first substrate facing the second substrate; and the first metal touch electrode layer comprises a plurality of first touch electrode lines, and the second metal touch electrode layer comprises a plurality of second touch electrode lines intersecting with the first touch electrode lines.

Claims

1. A capacitive touch panel, comprising:

a first substrate and a second substrate opposed to each other, the first substrate being provided with a black matrix;

wherein,

the black matrix is formed of a first metal touch electrode layer provided on a side of the first substrate away from the second substrate and a second metal touch electrode layer provided on a side of the first substrate facing the second substrate;

the first metal touch electrode layer comprises a plurality of first touch electrode lines, and the second metal touch electrode layer comprises a plurality of second touch electrode lines intersecting with the first touch electrode lines;

the capacitive touch panel further comprises;

first peripheral wirings provided on the side of the first substrate away from the second substrate and electrically connected with the first touch electrode lines, second peripheral wirings provided on the side of the first substrate facing the second substrate and electrically connected with the second touch electrode lines;

the first metal touch electrode layer further comprises two patterns respectively provided at two opposite edges of the first substrate and parallel to the plurality of first touch electrode lines, a width of each of the two patterns of the first metal touch electrode layer is larger than a width of each of the plurality of first touch electrode lines, and each of the two patterns of the first metal touch electrode layer is not connected with the first peripheral wirings; and

the second metal touch electrode layer further comprises two patterns respectively provided at two opposite edges of the first substrate and parallel to the plurality of second touch electrode lines, a width of each of the two patterns of the second metal touch electrode layer is larger than a width of each of the plurality of second touch electrode lines, and each of the two patterns of the second metal touch electrode layer is not connected with the second peripheral wirings.

2. The capacitive touch panel according to claim 1, further comprising:

a plurality of gate lines and a plurality of data lines intersecting with and insulating from each other which are provided on a side of the second substrate facing the first substrate, and thin film transistors provided at intersections of the gate lines and the data lines;

wherein,

projections of the gate lines on the first substrate fall within projections of the first touch electrode lines on the first substrate, projections of the data lines on the first substrate fall within projections of the second touch electrode lines on the first substrate, and projections of the thin film transistors on the first substrate fall within the projections of the first touch electrode lines and/or within the projections of the second touch electrode lines on the first substrate.

3. The capacitive touch panel according to claim 1, further comprising:

a plurality of gate lines and a plurality of data lines intersecting with and insulating from each other which are provided on a side of the second substrate facing the first substrate, and thin film transistors provided at intersections of the gate lines and the data lines;

wherein,

projections of the data lines on the first substrate fall within projections of the first touch electrode lines on the first substrate, projections of the gate lines on the first substrate fall within projections of the second touch electrode lines on the first substrate, and projections of the thin film transistors on the first substrate fall within the projections of the first touch electrode lines and/or within the projections of the second touch electrode lines on the first substrate.

4. The capacitive touch panel according to claim 2, wherein,

the first peripheral wirings and the first touch electrode lines are provided in a same layer and made of a same material;

and

the second peripheral wirings and the second touch electrode lines are provided in a same layer and made of a same material.

5. The capacitive touch panel according to claim 3, wherein,

the first peripheral wirings and the first touch electrode lines are provided in a same layer and made of a same material;

and

the second peripheral wirings and the second touch electrode lines are provided in a same layer and made of a same material.

6. The capacitive touch panel according to claim 1, wherein,

the first substrate is an opposed substrate, and the second substrate is an array substrate;

or,

the first substrate is a package cover plate, and the second substrate is the array substrate.

7. A display device, comprising the capacitive touch panel according to claim 1.

8. A method of determining touch position of the capacitive touch panel according to claim 1, comprising:

inputting a touch scanning signal to the first touch electrode lines;

detecting voltage signals of the second touch electrode lines which are obtained by coupling the touch scanning signal by sensing capacitances;

determining the touch position of the capacitive touch panel according to a change of the detected voltage signals and positions of the sensing capacitances;

or,

inputting the touch scanning signal to the second touch electrode lines;

detecting voltage signals of the first touch electrode lines which are obtained by coupling the touch scanning signal by the sensing capacitances; and

determining the touch position of the capacitive touch panel according to the change of the detected voltage signals and the positions of the sensing capacitances.

9. The capacitive touch panel according to claim 2, further comprising:

third peripheral wirings provided on the side of the second substrate facing the first substrate and electrically connected with the gate lines or the data lines;

wherein,

projections of the first peripheral wirings on the first substrate fall within an projection of the second metal touch electrode layer on the first substrate, projections of the second peripheral wirings on the first substrate fall within an projection of the first metal touch electrode layer on the first substrate, and projections of the third peripheral wirings on the first substrate fall within the projections of the first metal touch electrode layer and the second metal touch electrode layer on the first substrate.

10. The capacitive touch panel according to claim 3, further comprising:

third peripheral wirings provided on the side of the second substrate facing the first substrate and electrically connected with the gate lines or the data lines;

wherein,

projections of the first peripheral wirings on the first substrate fall within an projection of the second metal touch electrode layer on the first substrate, projections of the second peripheral wirings on the first substrate fall within an projection of the first metal touch electrode layer on the first substrate, and projections of the third peripheral wirings on the first substrate fall within the projections of the first metal touch electrode layer and the second metal touch electrode layer on the first substrate.

11. The capacitive touch panel according to claim 1, wherein, at least two adjacent first touch electrode lines are electrically connected with each other via the first peripheral wirings to form one touch scanning line and at least two adjacent second touch electrode lines are electrically connected with each other via the second peripheral wirings to form one touch sensing line, or, at least two adjacent first touch electrode lines are electrically connected with each other via the first peripheral wirings to form one touch sensing line and at least two adjacent second touch electrode lines are electrically connected with each other via the second peripheral wirings to form one touch scanning line.

12. The capacitive touch panel according to claim 9, wherein, the projections of the first peripheral wirings on the first substrate fall within projections of the two patterns of the second metal touch electrode layer on the first substrate, and the projections of the second peripheral wirings on the first substrate fall within projections of the two patterns of the first metal touch electrode layer on the first substrate.

13. The capacitive touch panel according to claim 10, wherein, the projections of the first peripheral wirings on the first substrate fall within projections of the two patterns of the second metal touch electrode layer on the first substrate, and the projections of the second peripheral wirings on the first substrate fall within projections of the two patterns of the first metal touch electrode layer on the first substrate.