DISPLAY PANEL WITH TOUCH DETECTION FUNCTION

• US 20160253023A1
• Filed: 04/08/2015
• Published: 09/01/2016
• Est. Priority Date: 02/27/2015
• Status: Active Grant

• Current Assignee: Paneltouch Technologies LLC (Touch Display LLC)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation), Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: AOYAMA, Toshiyuki, FUKAMI, Tetsuo, KAJITA, Daisuke, TAKAGI, Kazushige
• Granted Patent: US 9,910,530 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

Provided is a display panel including: a plurality of pixel electrodes divided into a plurality of groups; and a plurality of common electrodes arranged at a ratio of one to a plurality of pixel electrodes included in one of the plurality of groups. Each of a plurality of sensor electrode lines overlaps with corresponding one of a plurality of data signal lines in plan view. The plurality of sensor electrode lines and each of the plurality of common electrodes overlap each other in plan view. The each of the plurality of common electrodes is electrically connected to the plurality of sensor electrode lines. At least one insulating film is formed between each of a region between the data signal lines and the sensor electrode lines, a region between the sensor electrode lines and the common electrodes, and a region between the common electrodes and the pixel electrodes.

Claims

1. A display panel, comprising:

a plurality of gate signal lines extending in a first direction;

a plurality of data signal lines and a plurality of sensor electrode lines, which extend in a second direction different from the first direction;

a plurality of pixel electrodes arranged so as to respectively correspond to a plurality of pixels arrayed in the first direction and the second direction, the plurality of pixel electrodes being divided into a plurality of groups; and

a plurality of common electrodes arranged at a ratio of one to a plurality of pixel electrodes included in one of the plurality of groups, wherein;

each of the plurality of sensor electrode lines overlaps with corresponding one of the plurality of data signal lines in plan view;

at least two of the plurality of sensor electrode lines and each of the plurality of common electrodes overlap each other in plan view, and the each of the plurality of common electrodes is electrically connected to at least one of the at least two of the plurality of sensor electrode lines overlapping with the each of the plurality of common electrodes; and

at least one insulating film is formed between each of a region between the plurality of data signal lines and the plurality of sensor electrode lines, a region between the plurality of sensor electrode lines and the plurality of common electrodes, and a region between the plurality of common electrodes and the plurality of pixel electrodes.

2. The display panel according to claim 1, wherein the plurality of common electrodes are arrayed at equal intervals in the first direction and the second direction.

3. The display panel according to claim 1, wherein the each of the plurality of common electrodes is electrically connected to at least one of the plurality of sensor electrode lines via a through hole formed through the at least one insulating film formed in the region between the plurality of sensor electrode lines and the plurality of common electrodes.

4. The display panel according to claim 1, wherein:

the plurality of data signal lines are formed on a first insulating film formed so as to cover the plurality of gate signal lines;

a second insulating film is formed between the plurality of data signal lines and the plurality of sensor electrode lines so as to cover the plurality of data signal lines;

a third insulating film is formed on the second insulating film;

the plurality of common electrodes are formed on the third insulating film;

a fourth insulating film is formed between the plurality of sensor electrode lines and the plurality of common electrodes so as to cover the plurality of common electrodes;

the plurality of sensor electrode lines are formed on the fourth insulating film;

a fifth insulating film is formed between the plurality of common electrodes and the plurality of pixel electrodes so as to cover the plurality of sensor electrode lines;

the plurality of pixel electrodes are formed on the fifth insulating film; and

the fourth insulating film has a through hole formed in apart thereof so as to electrically connect the each of the plurality of sensor electrode lines and corresponding one of the plurality of common electrodes to each other.

5. The display panel according to claim 1, wherein:

the plurality of data signal lines are formed on a first insulating film formed so as to cover the plurality of gate signal lines;

a second insulating film is formed between the plurality of data signal lines and the plurality of sensor electrode lines so as to cover the plurality of data signal lines;

a third insulating film is formed on the second insulating film;

the plurality of sensor electrode lines are formed on the third insulating film;

a fourth insulating film is formed between the plurality of sensor electrode lines and the plurality of common electrodes so as to cover the plurality of sensor electrode lines;

the plurality of common electrodes are formed on the fourth insulating film;

a fifth insulating film is formed between the plurality of common electrodes and the plurality of pixel electrodes so as to cover the plurality of common electrodes;

the plurality of pixel electrodes are formed on the fifth insulating film; and

the fourth insulating film has a through hole formed in apart thereof so as to electrically connect the each of the plurality of sensor electrode lines and corresponding one of the plurality of common electrodes to each other.

6. The display panel according to claim 5, further comprising an adhesion layer formed between the third insulating film and the each of the plurality of sensor electrode lines.

7. The display panel according to claim 1, wherein:

the plurality of data signal lines and the plurality of pixel electrodes are formed on a first insulating film formed so as to cover the plurality of gate signal lines;

a second insulating film is formed between the plurality of data signal lines and the plurality of sensor electrode lines so as to cover the plurality of data signal lines and the plurality of pixel electrodes;

the plurality of sensor electrode lines are formed on the second insulating film;

a third insulating film is formed between the plurality of sensor electrode lines and the plurality of common electrodes so as to cover the plurality of sensor electrode lines;

the plurality of common electrodes are formed on the third insulating film; and

the third insulating film has a through hole formed in a part thereof so as to electrically connect the each of the plurality of sensor electrode lines and corresponding one of the plurality of common electrodes to each other.

8. The display panel according to claim 7, further comprising an adhesion layer formed between the second insulating film and the each of the plurality of sensor electrode lines.

9. The display panel according to claim 1, wherein:

the plurality of data signal lines and the plurality of pixel electrodes are formed on a first insulating film formed so as to cover the plurality of gate signal lines;

a second insulating film is formed between the plurality of data signal lines and the plurality of sensor electrode lines so as to cover the plurality of data signal lines and the plurality of pixel electrodes;

the plurality of common electrodes are formed on the second insulating film;

a third insulating film is formed between the plurality of sensor electrode lines and the plurality of common electrodes so as to cover the plurality of common electrodes;

the plurality of sensor electrode lines are formed on the third insulating film; and

the third insulating film has a through hole formed in a part thereof so as to electrically connect the each of the plurality of sensor electrode lines and corresponding one of the plurality of common electrodes to each other.

10. The display panel according to claim 1, wherein the at least one insulating film is made of an organic material.

11. The display panel according to claim 1, further comprising shielding wiring arranged so as to cover a gap between adjacent two of the plurality of common electrodes in plan view.

12. The display panel according to claim 1, wherein the plurality of common electrodes are arranged so that a gap between adjacent two of the plurality of common electrodes overlaps with a gap between adjacent pixels in plan view.

13. The display panel according to claim 1, wherein the plurality of common electrodes are arranged so that a gap between adjacent two of the plurality of common electrodes is positioned close to a center of a pixel region in plan view.

14. The display panel according to claim 1, wherein a number of the sensor electrode lines to be electrically connected to corresponding one of the plurality of common electrodes, which is arranged on a side closer to a first drive circuit for outputting a sensor voltage, is smaller than a number of the sensor electrode lines to be electrically connected to corresponding one of the plurality of common electrodes, which is arranged on aside farther from the first drive circuit.