Display device substrate and display device

• US 9,946,419 B2
• Filed: 12/18/2015
• Issued: 04/17/2018
• Est. Priority Date: 06/19/2013
• Status: Active Grant

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Kimura, Yukihiro, Fukuyoshi, Kenzo
• Primary Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US14/974,301
• Publication Number:
  US 20160103531A1
• Time in Patent Office: 851 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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: H10K 59/40 OLEDs integrated with touch screens

Abstract

A display device substrate including a transparent substrate having a display portion formed in an overall rectangular shape in a planar view, an electrode disposed in the display portion and having pixel openings, the electrode including partial patterns which are electrically isolated from one another and formed in parallel to a first direction along the transparent substrate, a first transparent resin layer formed on the electrode, a transparent electrode formed on the first transparent resin layer, and including partial patterns which are formed along the transparent substrate and in parallel to a second direction perpendicular to the first direction, and a second transparent resin layer formed on the partial patterns of the transparent electrode.

Claims

1. A display device substrate, comprising:

a transparent substrate having a display portion formed in an overall rectangular shape in a planar view;

an electrode disposed in the display portion and having a plurality of pixel openings, the electrode including a plurality of partial patterns which are electrically isolated from one another and formed in parallel to a first direction along the transparent substrate;

a first transparent resin layer formed on the electrode;

a transparent electrode formed on the first transparent resin layer, and including a plurality of partial patterns which are formed along the transparent substrate and in parallel to a second direction perpendicular to the first direction; and

a second transparent resin layer formed on the partial patterns of the transparent electrode,

wherein the electrode comprises a first light absorption resin layer, a metal film formed on the display portion in an order thereof, and a second light absorption resin layer formed on the metal film, the first light absorption resin layer includes a black colorant, the metal film has alkali tolerance, and the second light absorption resin layer includes a black colorant.

2. The display device substrate according to claim 1, wherein the first light absorption resin layer has an optical density in a range of from 0.4 to 1.8 per 1 μ

m film thickness, as measured by a transmittance measurement, the first light absorption resin layer has a film thickness in a range of from 0.1 μ

m to 0.7 μ

m, and the electrode has a film thickness of 1 μ

m or less.

3. The display device substrate according to claim 1, wherein the metal film comprises a copper alloy.

4. The display device substrate according to claim 3, wherein the copper alloy comprises at least one selected from the group consisting of magnesium, calcium, titanium, molybdenum, indium, tin, zinc, aluminum, beryllium and nickel.

5. The display device substrate according to claim 1, wherein the black colorant of the first light absorption resin layer is carbon.

6. The display device substrate according to claim 1, wherein the display portion has a terminal portion formed in an outer periphery of the display portion, the terminal portion is electrically connected to the electrode and includes a base terminal and a cover terminal formed on the base terminal, and the base terminal includes an extended portion of the partial patterns of the electrode and has the metal film exposed.

7. The display device substrate according to claim 1, further comprising:

an auxiliary conductor formed on the partial patterns of the transparent electrode,

wherein the auxiliary conductor has a resistivity smaller than a resistivity of the transparent electrode.

8. The display device substrate according to claim 1, wherein red pixels formed by a red layer, green pixels formed by a green layer or blue pixels formed by a blue layer are formed in the pixel openings, and the red pixels, the green pixels or the blue pixels are formed adjacently between the transparent substrate and the first transparent resin layer in a planar view.

9. The display device substrate according to claim 1, further comprising:

a black matrix formed on the first transparent resin layer via the partial patterns such that the black matrix overlaps with the partial patterns of the electrode in a planar view.

10. The display device substrate according to claim 9, wherein the black matrix is a black layer which has a light shielding property and includes a colorant comprising an organic pigment.

11. The display device substrate according to claim 1, further comprising:

a common electrode comprising a transparent conductive film and formed on the second transparent resin layer.

12. The display device substrate according to claim 11, further comprising:

a terminal portion formed in an outer periphery of the display portion and electrically connected to the electrode; and

a cover terminal formed on the terminal portion,

wherein the cover terminal comprises a material same as a material in the transparent electrode or the common electrode, and is electrically isolated from the transparent electrode or the common electrode.

13. The display device substrate according to claim 11, further comprising:

an auxiliary conductor comprising an aluminum alloy and formed on the partial patterns of the transparent electrode; and

a terminal portion formed in an outer periphery of the display portion and electrically connected to the transparent electrode,

wherein the terminal portion includes a base terminal and a cover terminal, the base terminal includes an extended portion of the auxiliary conductor, and the cover terminal comprises a material same as a material in the common electrode and is electrically isolated from the common electrode.

14. A display device, comprising:

the display device substrate according to claim 1.

15. The display device according to claim 14, which has a touch sensing function and is configured such that an electrostatic capacitance that changes in response to a pointer approaching or contacting to a display screen of the display device is detected as a change in an electrostatic capacitance between the partial patterns of the metal film and the partial patterns of the transparent electrode.

16. The display device substrate according to claim 2, wherein the metal film comprises a copper alloy.

17. The display device substrate according to claim 2, wherein the black colorant of the first light absorption resin layer is carbon.

18. The display device substrate according to claim 2, wherein the display portion has a terminal portion formed in an outer periphery of the display portion, the terminal portion is electrically connected to the electrode and includes a base terminal and a cover terminal formed on the base terminal, and the base terminal includes an extended portion of the partial patterns of the electrode and has the metal firm exposed.

19. A display device substrate, comprising:

a transparent substrate having a display portion formed in an overall rectangular shape in a planar view;

an electrode disposed in the display portion and having a plurality of pixel openings, the electrode including a plurality of partial patterns which are electrically isolated from one another and formed in parallel to a first direction along the transparent substrate;

a first transparent resin layer formed on the electrode;

a transparent electrode formed on the first transparent resin layer, and including a plurality of partial patterns which are formed along the transparent substrate and in parallel to a second direction perpendicular to the first direction;

a second transparent resin layer formed on the partial patterns of the transparent electrode; and

an auxiliary conductor formed on the partial patterns of the transparent electrode and having a resistivity smaller than a resistivity of the transparent electrode.

20. A display device substrate, comprising:

a transparent substrate having a display portion formed in an overall rectangular shape in a planar view;

an electrode disposed in the display portion and having a plurality of pixel openings, the electrode including a plurality of partial patterns which are electrically isolated from one another and formed in parallel to a first direction along the transparent substrate;

a first transparent resin layer formed on the electrode;

a transparent electrode formed on the first transparent resin layer, and including a plurality of partial patterns which are formed along the transparent substrate and in parallel to a second direction perpendicular to the first direction;

a second transparent resin layer formed on the partial patterns of the transparent electrode;

a common electrode comprising a transparent conductive film and formed on the second transparent resin layer;

an auxiliary conductor comprising an aluminum alloy and formed on the partial patterns of the transparent electrode; and

a terminal portion formed in an outer periphery of the display portion and electrically connected to the transparent electrode,

wherein the terminal portion includes a base terminal and a cover terminal, the base terminal includes an extended portion of the auxiliary conductor, and the cover terminal comprises a material same as a material in the common electrode and is electrically isolated from the common electrode.