Touch sensor integrated type display device

• US 9,304,620 B2
• Filed: 12/04/2013
• Issued: 04/05/2016
• Est. Priority Date: 12/13/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Han, Manhyeop, Kim, Cheolse, Kim, Jinseong
• Primary Examiner(s): Regn, Mark
• Application Number:
  US14/096,222
• Publication Number:
  US 20140168149A1
• Time in Patent Office: 853 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/04166 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 touch sensor integrated type display device includes gate lines and data lines crossing over each other, pixel electrodes respectively formed in areas defined by crossing the gate lines and the data lines, first electrodes, each of which is formed between the pixel electrodes and in parallel with the gate line, the pixel electrodes being adjacent to each other with the gate line interposed therebetween, second electrodes formed in parallel with the data lines to overlap the pixel electrode, first routing wires connecting some of the first electrodes to form first electrode groups arranged in a first direction, second routing wires connecting another some of the first electrodes to form second electrode groups arranged in the first direction; and third routing wires connecting some of the second electrodes to form third electrode groups arranged in a second direction.

Claims

1. A touch sensor integrated type display device comprising:

a plurality of gate lines and a plurality of data lines which are formed to cross over each other;

a plurality of pixel electrodes respectively formed in areas defined by a crossing structure of the plurality of gate lines and the plurality of data lines;

a plurality of first electrodes, each of which is formed between the pixel electrodes and in parallel with the gate line, the pixel electrodes being adjacent to each other with the gate line interposed therebetween;

a plurality of second electrodes formed in parallel with the data lines, at least a portion of each of the plurality of second electrodes overlapping the pixel electrode;

a plurality of first routing wires, each of which connects some of the plurality of first electrodes based on a first predetermined number to form a plurality of first electrode groups each including the some of the plurality of first electrodes arranged in a first direction;

a plurality of second routing wires, each of which connects another some of the plurality of first electrodes based on a second predetermined number to form a plurality of second electrode groups each including the another some of the first plurality of electrodes arranged in the first direction; and

a plurality of third routing wires, each of which connects some of the plurality of second electrodes based on a third predetermined number to form a plurality of third electrode groups each including the some of the plurality of second electrodes arranged in a second direction crossing the first direction,

wherein the plurality of first electrode groups and the plurality of second electrode groups are alternately disposed, and a ratio of the number of first electrodes included in each first electrode group to the number of first electrodes included in each second electrode group is m;

1, where m is a natural number,

wherein the plurality of second routing wires are connected to ground,

wherein each of the second electrodes includes a plurality of electrode patterns arranged in the first and second directions,

wherein the electrode patterns neighbored in the second direction are connected by at least one connection portion, and

wherein the first electrodes cross over the at least one connection portion.

2. The touch sensor integrated type display device of claim 1, further comprising a plurality of fourth routing wires, each of which connects another some of the plurality of second electrodes based on a fourth predetermined number to form a plurality of fourth electrode groups each including the another some of the plurality of second electrodes arranged in the second direction,

wherein the plurality of third electrode groups and the fourth electrode groups are alternately disposed, and a ratio of the number of second electrodes included in each third electrode group to the number of second electrodes included in each fourth electrode group is n:

1, where n is a natural number, and

wherein the fourth routing wires are connected to a power supply unit supplying a common voltage during a display operation, and are connected to ground during a touch operation.

3. The touch sensor integrated type display device of claim 2, further comprising at least one first resistance reducing wire configured to overlap each of the plurality of first electrodes along a direction of the first electrodes and reduce resistances of the first electrodes,

wherein the first electrodes of the second electrode group are connected to the second routing wires through the at least one first resistance reducing wire.

4. The touch sensor integrated type display device of claim 3, further comprising at least one second resistance reducing wire configured to overlap each of the plurality of second electrodes along a direction of the second electrodes and reduce resistances of the second electrodes,

wherein the second electrodes of the fourth electrode group are connected to the fourth routing wires through the at least one second resistance reducing wire.

5. The touch sensor integrated type display device of claim 1, wherein in the first direction, the at least one connection portion has a thinner width than the neighboring second electrodes.

6. A touch sensor integrated type display device comprising:

a plurality of gate lines formed in parallel on a first substrate;

a gate insulating layer configured to cover the gate lines;

a plurality of data lines formed on the gate insulating layer to cross the gate lines;

a plurality of thin film transistors respectively formed in a plurality of pixel areas defined by a crossing structure of the gate lines and the data lines;

a first passivation layer configured to cover the gate insulating layer, on which the plurality of thin film transistors are formed;

a plurality of pixel electrodes formed on the first passivation layer in the plurality of pixel areas, respectively;

a plurality of first electrodes, each of which is formed between the pixel electrodes and in parallel with the gate line, the pixel electrodes being adjacent to each other with the gate line interposed therebetween;

a second passivation layer configured to cover the plurality of first electrodes;

a plurality of second electrodes formed on the second passivation layer in parallel with the data lines, at least a portion of each of the plurality of second electrodes overlapping the pixel electrode;

a plurality of first routing wires, each of which connects some of the plurality of first electrodes based on a first predetermined number to form a plurality of first electrode groups each including the some of the plurality of first electrodes arranged in a first direction;

a plurality of second routing wires, each of which connects another some of the plurality of first electrodes based on a second predetermined number to form a plurality of second electrode groups each including the another some of the first plurality of electrodes arranged in the first direction; and

a plurality of third routing wires, each of which connects some of the plurality of second electrodes based on a third predetermined number to form a plurality of third electrode groups each including the some of the plurality of second electrodes arranged in a second direction crossing the first direction,

wherein the plurality of first electrode groups and the plurality of second electrode groups are alternately disposed, and a ratio of the number of first electrodes included in each first electrode group to the number of first electrodes included in each second electrode group is m;

1, where m is a natural number,

wherein the plurality of second routing wires are connected to ground,

wherein each of the second electrodes includes a plurality of electrode patterns arranged in the first and second directions,

wherein the electrode patterns neighbored in the second direction are connected by at least one connection portion, and

wherein the first electrodes cross over the at least one connection portion.

7. The touch sensor integrated type display device of claim 6, further comprising a plurality of fourth routing wires, each of which connects another some of the plurality of second electrodes based on a fourth predetermined number to form a plurality of fourth electrode groups each including the another some of the plurality of second electrodes arranged in the second direction,

wherein the plurality of third electrode groups and the fourth electrode groups are alternately disposed, and a ratio of the number of second electrodes included in each third electrode group to the number of second electrodes included in each fourth electrode group is n:

1, where n is a natural number, and

wherein the fourth routing wires are connected to a power supply unit supplying a common voltage during a display operation, and are connected to ground during a touch operation.

8. The touch sensor integrated type display device of claim 7, further comprising at least one first resistance reducing wire configured to overlap each of the plurality of first electrodes along a direction of the first electrodes and reduce resistances of the first electrodes,

wherein the first electrodes of the second electrode group are connected to the second routing wires through the at least one first resistance reducing wire.

9. The touch sensor integrated type display device of claim 8, further comprising at least one second resistance reducing wire configured to overlap each of the plurality of second electrodes along a direction of the second electrodes and reduce resistances of the second electrodes,

wherein the second electrodes of the fourth electrode group are connected to the fourth routing wires through the at least one second resistance reducing wire.

10. The touch sensor integrated type display device of claim 6, wherein in the first direction, the at least one connection portion has a thinner width than the neighboring second electrodes.

11. A touch sensor integrated type display device comprising:

a plurality of gate lines formed in parallel on a first substrate;

a gate insulating layer configured to cover the gate lines;

a plurality of data lines formed on the gate insulating layer to cross the gate lines;

a plurality of thin film transistors respectively formed in a plurality of pixel areas defined by a crossing structure of the gate lines and the data lines;

a first passivation layer configured to cover the gate insulating layer, on which the plurality of thin film transistors are formed;

a plurality of first electrodes, each of which is formed on the first passivation layer in parallel with the data lines and formed in at least two pixel areas, which are adjacent to each other with the gate line interposed therebetween;

a second passivation layer configured to cover the plurality of first electrodes;

a plurality of pixel electrodes formed on the second passivation layer in the plurality of pixel areas, respectively, at least a portion of each of the plurality of pixel electrodes overlapping the first electrode;

a plurality of second electrodes, each of which is formed on the second passivation layer in parallel with the gate line and are formed between the pixel electrodes and in parallel with the gate line, the pixel electrodes being adjacent to each other with the gate line interposed therebetween;

a plurality of first routing wires, each of which connects some of the plurality of second electrodes based on a first predetermined number to form a plurality of first electrode groups each including the some of the plurality of second electrodes arranged in a first direction;

a plurality of second routing wires, each of which connects another some of the plurality of second electrodes based on a second predetermined number to form a plurality of second electrode groups each including the another some of the plurality of second electrodes arranged in the first direction; and

a plurality of third routing wires, each of which connects some of the plurality of first electrodes based on a third predetermined number to form a plurality of third electrode groups each including the some of the plurality of first electrodes arranged in a second direction crossing the first direction,

wherein the plurality of first electrode groups and the plurality of second groups are alternately disposed, and a ratio of the number of second electrodes included in each first electrode group to the number of second electrodes included in each second electrode group is m;

1, where m is a natural number,

wherein the plurality of second routing wires are connected to ground,

wherein each of the second electrodes includes a plurality of electrode patterns arranged in the first and second directions,

wherein the electrode patterns neighbored in the second direction are connected by at least one connection portion, and

wherein the first electrodes cross over the at least one connection portion.

12. The touch sensor integrated type display device of claim 11, further comprising a plurality of fourth routing wires, each of which connects the anther some of the plurality of first electrodes based on a fourth predetermined number to form a plurality of fourth electrode groups each including the first electrodes arranged in the second direction,

wherein the third electrode groups and the fourth electrode groups are alternately disposed, and a ratio of the number of first electrodes included in each third electrode group to the number of first electrodes included in each fourth electrode group is n:

1, where n is a natural number,

wherein the fourth routing wires are connected to a power supply unit supplying a common voltage during a display operation is performed, and are connected to ground during a touch operation.

13. The touch sensor integrated type display device of claim 12, further comprising at least one first resistance reducing wire configured to overlap each of the plurality of second electrodes along a direction of the second electrodes and reduce resistances of the second electrodes,

wherein the second electrodes of the second electrode group are connected to the second routing wires through the at least one first resistance reducing wire.

14. The touch sensor integrated type display device of claim 13, further comprising at least one second resistance reducing wire configured to overlap each of the plurality of first electrodes along a direction of the first electrodes and reduce resistances of the first electrodes,

wherein the first electrodes of the fourth electrode group are connected to the fourth routing wires through the at least one second resistance reducing wire.

15. The touch sensor integrated type display device of claim 13, wherein in the first direction, the at least one connection portion has a thinner width than the neighboring second electrodes.