Display device

• US 10,338,714 B2
• Filed: 08/11/2017
• Issued: 07/02/2019
• Est. Priority Date: 08/26/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Hirosawa, Jin
• Primary Examiner(s): Pan, Jia X
• Application Number:
  US15/674,611
• Publication Number:
  US 20180059840A1
• Time in Patent Office: 690 Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• 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 1/133514 Colour filters
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

According to one embodiment, a display device includes a first substrate including an insulating substrate, a color filter layer located above the insulating substrate, a signal line located between the insulating substrate and the color filter layer, a metal line located above the color filter layer, a first light-shielding layer stacked on the metal line, a common electrode located above the first light-shielding layer, a pixel electrode opposed to the common electrode, a second substrate opposed to the first substrate, and a liquid crystal layer held between the first substrate and the second substrate.

Claims

1. A display device comprising:

a first substrate including an insulating substrate, a color filter layer located above the insulating substrate, a signal line located between the insulating substrate and the color filter layer, a metal line located above the color filter layer, a first light-shielding layer stacked on the metal line, a common electrode located above the first light-shielding layer, a pixel electrode opposed to the common electrode;

a second substrate opposed to the first substrate; and

a liquid crystal layer held between the first substrate and the second substrate, wherein the display device further comprises a display area in which the metal line, the pixel electrode, and the common electrode are arranged, a non-display area surrounding the display area, and a relay electrode located above the insulating substrate in the non-display area, and

the metal line and the common electrode extend to the non-display area, are in contact with the relay electrode, and are electrically connected to each other.

2. The display device of claim 1, further comprising a first organic insulating film located between the color filter layer and the metal line, and a second organic insulating film which covers the first organic insulating film, the metal line, and the first light-shielding layer.

3. The display device of claim 2, wherein:

the first organic insulating film directly covers the relay electrode without interposition of the color filter layer, and includes a contact hole penetrated to the relay electrode, in the non-display area; and

the metal line and the common electrode are in contact with the relay electrode at the contact hole.

4. The display device of claim 1, wherein the metal line includes both ends located in the non-display area, and the both ends are each electrically connected to the common electrode.

5. The display device of claim 1, wherein the first light-shielding layer covers an upper surface of the metal line, and a width of the first light-shielding layer is greater than a width of the metal line.

6. The display device of claim 1, wherein:

the color filter layer includes a first color filter of a first color, and a second color filter of a second color different from the first color;

an edge of each of the first color filter and the second color filter overlaps the signal line; and

the metal line is located directly above the signal line.

7. The display device of claim 1, wherein:

the first substrate comprises a scanning line intersecting the signal line; and

the second substrate comprises a second light-shielding layer overlapping the scanning line.

8. A display device comprising:

a display area;

a non-display area surrounding the display area;

a relay electrode located in the non-display area;

a first interlayer insulating film located above the relay electrode;

a metal line extending above the first interlayer insulating film in the display area and the non-display area;

a second interlayer insulating film located above the first interlayer insulating film and the metal line; and

a common electrode extending above the second interlayer insulating film the display area and the non-display area,

the first interlayer isolating film including a contact hole penetrated to the relay electrode,

the metal line and the common electrode being in contact with the relay electrode at the contact hole.

9. The display device of claim 8, further comprising a signal line which is located in the display area, and is covered with the first interlayer insulating film.

10. The display device of claim 8, wherein:

the first interlayer insulating film includes a color filter layer located in the display area, and a first organic insulating film located above the color filter layer in the display area and extending to the non-display area; and

the contact hole is formed in the first organic insulating film.

11. The display device of claim 10, wherein the first organic insulating film is in contact pith the relay electrode without interposition of the color filter layer.

12. The display device of claim 8, further comprising a light-shielding layer which is stacked on the metal line and is covered with the second interlayer insulating film.

13. The display device of claim 12, wherein the light-shielding layer covers an upper surface of the metal line, and a width of the light-shielding layer is greater than a width of the metal line.

14. The display device of claim 12, wherein the common electrode includes a first portion in contact with the light-shielding layer, and a second portion in contact with the relay electrode at the contact hole.

15. A display device comprising:

a first substrate including an insulating substrate, a signal line, a first organic insulating film located above the signal line, a metal line located above the first organic insulating film, an insulator stacked on the metal line, a second organic insulating film which covers the insulator, a common electrode located above the second organic insulating film, and a pixel electrode opposed to the common electrode;

a second substrate opposed to the first substrate; and

a liquid crystal layer held between the first substrate and the second substrate, wherein

the metal line is in contact with the first organic insulating film;

the insulator is not in contact with the first organic insulating film; and

the second organic insulating film is in contact with each of the metal line, the insulator, and the first organic insulating film.

16. The display device of claim 15, further comprising a display area, a non-display area surrounding the display area, and a relay electrode located in a same layer as the signal line in the non-display area, wherein:

the common electrode is located on the second organic insulating film in the display area; and

the common electrode includes a first portion in contact with the insulator, and a second portion in contact with the relay electrode in the non-display area.

17. The display device of claim 16, wherein:

the metal line is in contact with an upper surface and a side surface of the first organic insulating film, and the relay electrode, in an area overlapping the first portion; and

the metal line and the common electrode are electrically connected to each other via the relay electrode.

18. The display device of claim 17, further comprising a color filter layer located between the signal line and the first organic insulating film in the display area, wherein

the first organic insulating film is in contact with the relay electrode without interposition of the color filter layer.