DISPLAY APPARATUS

• US 20170212624A1
• Filed: 01/17/2017
• Published: 07/27/2017
• Est. Priority Date: 01/27/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: OBINATA, Naoyuki, KATSUTA, Tadayoshi, FUKUSHIMA, Toshiaki, KOIDE, Gen
• Granted Patent: US 10,684,712 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A display apparatus includes a first pad electrically connected to the drive circuit, a voltage supply line having one end electrically connected to the first pad, a common wire electrically connected to the voltage supply line and the second electrode, a transistor formed between the voltage supply line and the common wire, and a branch wire being a part of the voltage supply line, extending from a branch section, and electrically connected to the first pad. Then, the branch section is located closer to a center of the insulating substrate than the first pad in a plan view.

Claims

1. A display apparatus comprising:

an insulating substrate;

an optical element layer;

a first electrode and a second electrode driving the optical element layer;

a drive circuit;

a first pad electrically connected to the drive circuit;

a voltage supply line having one end electrically connected to the first pad;

a common wire electrically connected to the voltage supply line and the second electrode;

a transistor formed between the voltage supply line and the common wire; and

a branch wire being a part of the voltage supply line, extending from a branch section, and electrically connected to the first pad,

wherein the branch section is located closer to a center of the insulating substrate than the first pad in a plan view.

2. The display apparatus according to claim 1, further comprising:

a second pad which is electrically connected to the drive circuit;

a plurality of video signal lines formed in a pixel region; and

a plurality lead-out wires formed in a peripheral region,

wherein the other end of the voltage supply line is electrically connected to the second pad,

one of the plurality of lead-out wires is electrically connected to one of the plurality of video signal lines,

the plurality of lead-out wires include a first lead-out wire group and a second lead-out wire group, and

a d-wire section of the branch wire extends in a region between the first lead-out wire group and the second lead-out wire group.

3. The display apparatus according to claim 2, further comprising:

a plurality of the transistors, the plurality of transistors being arrayed in a first direction,

wherein the voltage supply line includes an a-wire section, a b-wire section, a c-wire section, and the d-wire section,

the a-wire section extends from the first pad in a second direction intersecting with the first direction,

the b-wire section extends from the second pad in the second direction,

the c-wire section extends in the first direction and is disposed between the a-wire section and the b-wire section,

the first lead-out wire group is disposed between the a-wire section and the d-wire section, and

a width of the d-wire section is larger than a width of the a-wire section.

4. The display apparatus according to claim 1, further comprising:

a second electrode drive circuit driving the transistor;

a plurality of video signal lines formed in a pixel region; and

a plurality lead-out wires formed in a peripheral region,

wherein one of the plurality of lead-out wires is electrically connected to one of the plurality of video signal lines,

the plurality of lead-out wires include a first lead-out wire group and a second lead-out wire group, and

the second electrode drive circuit is formed in a region between the first lead-out wire group and the second lead-out wire group.

5. The display apparatus according to claim 1,

wherein the voltage supply line includes a first voltage supply line and a second voltage supply line,

the transistor includes a first transistor and a second transistor,

the first voltage supply line includes a first branch wire as the branch wire,

the second voltage supply line includes a second branch wire as the branch wire,

the first voltage supply line is electrically connected to the common wire via the first transistor, and

the second voltage supply line is electrically connected to the common wire via the second transistor.

6. The display apparatus according to claim 5,

wherein the second electrode has a function of a display electrode displaying an image and a function of a detection electrode detecting proximity or contact of an object,

the first voltage supply line is a wire supplying voltage during a period in which the second electrode functions as the display electrode,

the second voltage supply line is a wire supplying voltage during a period in which the second electrode functions as the detection electrode, and

a resistance value of the first voltage supply line is lower than a resistance value of the second voltage supply line.

7. The display apparatus according to claim 5, further comprising:

a second electrode drive circuit driving the transistor;

a plurality of video signal lines formed in a pixel region; and

a plurality lead-out wires formed in a peripheral region,

wherein one of the plurality of lead-out wires is electrically connected to one of the plurality of video signal lines,

the plurality of lead-out wires include a first lead-out wire group and a second lead-out wire group,

the first branch wire, the second branch wire, and the second electrode drive circuit are formed in a region between the first lead-out wire group and the second lead-out wire group, and

the second electrode drive circuit is disposed between the first branch wire and the second branch wire.

8. The display apparatus according to claim 1, further comprising:

a plurality of video signal lines formed in a pixel region;

a plurality lead-out wires formed in a peripheral region; and

a driver chip to which the plurality of lead-out wires are electrically connected,

wherein the branch wire includes an e-wire section overlapping with the driver chip in a plan view.

9. The display apparatus according to claim 8, further comprising:

a second pad electrically connected to the drive circuit; and

a plurality of the transistors, the plurality of transistors being arrayed in a first direction,

wherein the voltage supply line includes an a-wire section, a b-wire section, a c-wire section, and the e-wire section,

the other end of the voltage supply line is electrically connected to the second pad,

the a-wire section extends from the first pad in a second direction intersecting with the first direction,

the b-wire section extends from the second pad in the second direction,

the c-wire section extends in the first direction and is disposed between the a-wire section and the b-wire section, and

a width of the e-wire section is larger than a width of the a-wire section.

10. The display apparatus according to claim 1, further comprising:

a second pad electrically connected to the drive circuit; and

a plurality of the transistors, the plurality of transistors being arrayed in a first direction,

wherein the voltage supply line includes an a-wire section, a b-wire section, and a c-wire section,

the other end of the voltage supply line is electrically connected to the second pad,

the a-wire section extends from the first pad in a second direction intersecting with the first direction,

the b-wire section extends from the second pad in the second direction,

the c-wire section extends in the first direction and is disposed between the a-wire section and the b-wire section, and

a width of the c-wire section is larger than a width of the a-wire section.

11. The display apparatus according to claim 2, further comprising:

a second electrode drive circuit driving the transistor,

wherein the second electrode drive circuit is formed in a region between the first lead-out wire group and the second lead-out wire group.

12. The display apparatus according to claim 3, further comprising:

a second electrode drive circuit driving the transistor,

wherein the second electrode drive circuit is formed in a region between the first lead-out wire group and the second lead-out wire group.

13. The display apparatus according to claim 2,

wherein the voltage supply line includes a first voltage supply line and a second voltage supply line,

the transistor includes a first transistor and a second transistor,

the first voltage supply line includes a first branch wire as the branch wire,

the second voltage supply line includes a second branch wire as the branch wire,

the first voltage supply line is electrically connected to the common wire via the first transistor, and

the second voltage supply line is electrically connected to the common wire via the second transistor.

14. The display apparatus according to claim 3,

wherein the voltage supply line includes a first voltage supply line and a second voltage supply line,

the transistor includes a first transistor and a second transistor,

the first voltage supply line includes a first branch wire as the branch wire,

the second voltage supply line includes a second branch wire as the branch wire,

the first voltage supply line is electrically connected to the common wire via the first transistor, and

the second voltage supply line is electrically connected to the common wire via the second transistor.

15. The display apparatus according to claim 4,

wherein the voltage supply line includes a first voltage supply line and a second voltage supply line,

the transistor includes a first transistor and a second transistor,

the first voltage supply line includes a first branch wire as the branch wire,

the second voltage supply line includes a second branch wire as the branch wire,

the first voltage supply line is electrically connected to the common wire via the first transistor, and

the second voltage supply line is electrically connected to the common wire via the second transistor.

16. The display apparatus according to claim 6, further comprising:

a second electrode drive circuit driving the transistor;

a plurality of video signal lines formed in a pixel region; and

a plurality lead-out wires formed in a peripheral region,

wherein one of the plurality of lead-out wires is electrically connected to one of the plurality of video signal lines,

the plurality of lead-out wires include a first lead-out wire group and a second lead-out wire group,

the first branch wire, the second branch wire, and the second electrode drive circuit are formed in a region between the first lead-out wire group and the second lead-out wire group, and

the second electrode drive circuit is disposed between the first branch wire and the second branch wire.

17. The display apparatus according to claim 2, further comprising:

a driver chip to which the plurality of lead-out wires are electrically connected,

wherein the branch wire includes an e-wire section overlapping with the driver chip in a plan view.

18. The display apparatus according to claim 3, further comprising:

a driver chip to which the plurality of lead-out wires are electrically connected,

wherein the branch wire includes an e-wire section overlapping with the driver chip in a plan view.

19. The display apparatus according to claim 4, further comprising:

a plurality of video signal lines formed in a pixel region;

a plurality lead-out wires formed in a peripheral region; and

a driver chip to which the plurality of lead-out wires are electrically connected,

wherein the branch wire includes an e-wire section overlapping with the driver chip in a plan view.

20. The display apparatus according to claim 5, further comprising:

a plurality of video signal lines formed in a pixel region;

a plurality lead-out wires formed in a peripheral region; and

a driver chip to which the plurality of lead-out wires are electrically connected,

wherein the branch wire includes an e-wire section overlapping with the driver chip in a plan view.