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

Patent metadata

Field	Value
Publication number	US-10067616-B2
Application number	US-201514810773-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Mar 13, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

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.

First claim

What is claimed is:

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 w

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Wang Wenlong
• Ma Tao
• Huang Yinhu

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/04166 Primary

  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 title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title