Display panel with touch sensor

• US 10,521,037 B2
• Filed: 01/20/2017
• Issued: 12/31/2019
• Est. Priority Date: 02/12/2016
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Orita, Tae, Ono, Takeshi, Agari, Masafumi, Mori, Seiichiro, Nakamura, Tatsuya
• Primary Examiner(s): Giesy, Adam R.
• Application Number:
  US16/074,800
• Publication Number:
  US 20190042039A1
• Time in Patent Office: 1,075 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/1343 Electrodes reflective electrodes G02F1/133553
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs

Abstract

A light-shielding portion is provided on an inner surface of a first substrate and has an opening pattern. A color material portion is provided on the inner surface of the first substrate. A second substrate faces the inner surface of the first substrate. Inner sensor electrodes are provided between the inner surface of the first substrate and the second substrate, and are included in the light-shielding portion in a plan view. Outer sensor electrodes are made of metal and are provided on an observation surface of the first substrate. The projection of the outer sensor electrode onto the inner surface of the first substrate through the optical path corresponding to the viewing angle is included in the light-shielding portion in a plan view. Each of the outer sensor electrodes includes a region extending along one direction parallel to a lateral direction of the display panel with a touch sensor.

Claims

1. A display panel with a touch sensor comprising:

a first substrate having translucency, the first substrate including an observation surface facing an observer and an inner surface opposite to the observation surface;

a light-shielding portion provided on the inner surface of the first substrate, the light-shielding portion having an opening pattern;

a color material portion provided on the inner surface of the first substrate, the color material portion including a plurality of color material layers arrayed corresponding to the opening pattern;

a second substrate facing the inner surface of the first substrate;

a display function layer held between the first substrate and the second substrate;

a plurality of inner sensor electrodes provided between the inner surface of the first substrate and the second substrate, the plurality of inner sensor electrodes included in the light-shielding portion in a plan view; and

a plurality of outer sensor electrodes made of metal, the plurality of outer sensor electrodes provided on the observation surface of the first substrate,

wherein a projection of each of the outer sensor electrodes onto the inner surface of the first substrate through an optical path corresponding to a viewing angle is included in the light-shielding portion in a plan view, and each of the outer sensor electrodes includes a region extending along one direction parallel to a lateral direction of the display panel with a touch sensor.

2. The display panel with a touch sensor according to claim 1, wherein each of the outer sensor electrodes extends along the one direction.

3. The display panel with a touch sensor according to claim 1, wherein each of the outer sensor electrodes further includes a region extending along a direction crossing the one direction.

4. The display panel with a touch sensor according to claim 1, further comprising a plurality of gate wiring pairs arranged on the second substrate, the plurality of gate wiring pairs each including two gate wiring lines, wherein each of the gate wiring pairs passes between pixels adjacent to each other in a direction crossing the one direction.

5. The display panel with a touch sensor according to claim 1, wherein the color material layers adjacent to each other in the one direction are separated by each of the inner sensor electrodes.

6. The display panel with a touch sensor according to claim 1, wherein the color material portion at least partially covers the inner sensor electrodes arranged on the inner surface of the first substrate.

7. The display panel with a touch sensor according to claim 1, wherein the light-shielding portion at least partially covers the inner sensor electrodes arranged on the inner surface of the first substrate.

8. The display panel with a touch sensor according to claim 1, further comprising a plurality of transistor elements provided on the second substrate, the plurality of transistor elements each including a source terminal and a drain terminal, wherein the inner sensor electrodes are connected to the source terminal of the transistor elements.

9. The display panel with a touch sensor according to claim 1, wherein each of the inner sensor electrodes includes a substrate-facing surface facing the first substrate, and the substrate-facing surface is covered with an antireflection film.

10. The display panel with a touch sensor according to claim 1, wherein each of the outer sensor electrodes contains at least any one of atoms of silver, copper, aluminum, molybdenum, and titanium.

11. The display panel with a touch sensor according to claim 1, wherein each of the outer sensor electrodes includes an observer-facing surface facing the observer, and the observer-facing surface is covered with an antireflection film.

12. The display panel with a touch sensor according to claim 1, wherein each of the outer sensor electrodes includes a side surface, and the side surface is covered with an antireflection film.