Display device with position inputting function

• US 10,585,515 B2
• Filed: 09/07/2018
• Issued: 03/10/2020
• Est. Priority Date: 09/13/2017
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yoshida, Masahiro
• Primary Examiner(s): Shah, Priyank J
• Application Number:
  US16/124,229
• Publication Number:
  US 20190079620A1
• Time in Patent Office: 550 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• 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 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A display device with a position inputting function includes pixel electrodes, signal wiring, position detection electrodes, a position detection wiring, conductive structural objects, bridging wirings, and an insulating film. The signal wirings are disposed to sandwich the pixel electrodes. The position detection wiring includes at least first wiring portions and second wiring portions. The first wiring portions are sandwiched between the pixel electrodes and the signal wirings. Pairs of the first wiring portions are linearly disposed in an arrangement direction in which the pixel electrodes are disposed. The second wiring portions connect ends of the first wiring portions adjacent to each other in the arrangement direction. The bridging wirings are disposed to cross the conductive structural objects. The bridging wirings include sections connected to ends of the first wiring portions adjacent to each other in the arrangement direction on the same side through contact holes in the insulating film.

Claims

1. A display device with a position inputting function comprising:

pixel electrodes linearly disposed;

signal wirings configured to transmit signals supplied to the pixel electrode and disposed to sandwich the pixel electrodes;

position detection electrodes each configured to form capacitors between the position detection electrodes and a position input member and to detect a position of input by the position input member;

a position detection wiring connected to the position detection electrodes comprising at least;

first wiring portions each sandwiched between the pixel electrodes and the signal wirings, wherein pairs of the first wiring portions are linearly disposed in an arrangement direction in which the pixel electrodes are disposed; and

second wiring portions connecting ends of the first wiring portions adjacent to each other in the arrangement direction;

conductive structural objects, at least sections of which are disposed in a layer in which the position detection wiring is disposed;

bridging wirings disposed to cross the conductive structural objects and including sections connected to ends of the first wiring portions adjacent to each other in the arrangement direction or ends of the first wiring portions on a same side with respect to the arrangement direction through contact holes, wherein the ends of the first line portions adjacent to each other in the arrangement direction are not connected to the second line portions; and

an insulating film disposed between the conductive structural objects and the bridging wirings, wherein the insulating film includes the contact holes.

2. The display device according to claim 1, wherein

the conductive structural objects are switching components connected to the signal wirings and the pixel electrodes and disposed between ends of the first wiring portions adjacent to each other in the arrangement direction, wherein the ends are not connected to the second wiring portions, and

the bridging wirings are connected to the ends of the first wiring portions adjacent to each other in the arrangement direction, wherein the ends are not connected to the second wiring portions.

3. The display device according to claim 2, wherein

the position detection wiring is connected to the first wiring portions adjacent to respective pairs of the first wiring portions in the arrangement direction on an opposite side from the respective pairs of the first wiring portions via the second wiring portions,

the switching components and the bridging wirings are disposed adjacent to the first wiring portions on an opposite side from a second wiring portion side in the arrangement direction,

the switching components adjacent to first-side first wiring portions disposed on a first side on the opposite side from the second wiring portion side are connected to the pixel electrodes disposed on the opposite side from the second wiring portion side in the arrangement direction and to one of the signal wirings, and

the switching components adjacent to second-side first wiring portions disposed on a second side on the opposite side from the second wiring portions side are connected to the pixel electrodes disposed on the second wiring portion side in the arrangement direction and to another one of the signal wirings.

4. The display device according to claim 1, wherein

the conductive structural objects are the pixel electrodes including sections disposed between ends of the first wiring portions on a same side in the arrangement direction, and

the bridging wirings are connected to the ends of the first wiring portions on the same side in the arrangement direction.

5. The display device according to claim 1, wherein

the conductive structural objects include sections disposed between ends of the first wiring portions on a same side in the arrangement direction, and

the position detection wiring includes third wiring portions connecting ends of the first wiring portions on an opposite side from a conductive structural object side.

6. The display device according to claim 5, further comprising:

a scan wiring extending to cross the signal wirings and the position detection wiring and through which scan signals are transmitted;

switching components connected to the scan wiring, the signal wirings, and the pixel electrodes; and

a common electrode disposed such that at least sections thereof overlap the pixel electrodes via an insulating film and including a void dividing the common electrode to form the position detection electrodes and separating the position detection electrodes from one another, wherein

the third wiring portions are disposed parallel to the scan wiring and to overlap sections of the void.

7. The display device according to claim 5, further comprising a common electrode including sections to overlap the pixel electrodes via an insulating film and divided to form the position detection electrodes, wherein the position detection electrodes include position detection wiring overlapping openings selectively overlapping the first wiring portions of the position detection wiring.

8. The display device according to claim 1, wherein

the bridging wirings are disposed in a layer in which the position detection electrodes are disposed, and

the insulating film includes position detection contact holes for connecting the position detection wiring to the position detection electrodes.

9. The display device according to claim 1, wherein the signal wirings and the position detection wirings are disposed in a same layer.

10. The display device according to claim 9, wherein the signal wirings and the position detection wiring are disposed in a layer in which the pixel electrodes are disposed.