DISPLAY DEVICE

• US 20150262536A1
• Filed: 03/12/2015
• Published: 09/17/2015
• Est. Priority Date: 03/14/2014
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: SUNG, Li-Wei, HUANG, Hui-Min, CHEN, Hung-Kun, LEE, Yi-Chin, CHANG, Hong-Kang, KAO, Yi-Chien, CHU, Jui-Ching
• Granted Patent: US 9,632,375 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133357 Planarisation layers
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• 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 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136254 Checking; Testing
• 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: G02F 2201/40 Arrangements for improving the aperture ratio
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/36 using liquid crystals

Abstract

A display device is provided. The display device includes a switch including a gate, an active layer disposed on the gate, a source electrode connected to the active layer, and a drain electrode connected to the active layer. In particular, the distance between the edge of the gate electrode and the edge of the active layer is 1.2 to 3 μm. The drain electrode includes a connection portion, an oblique portion, and an extension portion, wherein the oblique portion is disposed between the connection portion and the extension portion, and wherein at least a part of the oblique portion overlaps with the gate electrode.

Claims

1. A display device, comprising:

a switch, wherein the switch comprises;

a gate electrode;

an active layer disposed on the gate electrode, wherein a distance between at least one edge of the gate electrode and the active layer is between 1.2 μ

m and 3 μ

m;

a source electrode connected to the active layer;

a drain electrode connected to the active layer, wherein the drain electrode comprises a connection portion, an oblique portion, and an extension portion, wherein the oblique portion is disposed between the connection portion and the extension portion, and wherein at least a part of the oblique portion overlaps with the gate electrode.

2. The display device as claimed in claim 1, further comprising:

a gate line substantially extending along a first direction, wherein the gate line electrically connects to the gate electrode; and

a data line substantially extending along a second direction, wherein the data line electrically connects to the source electrode.

3. The display device as claimed in claim 2, wherein the oblique portion extends along a third direction, and wherein an included angle between the third direction and the first direction is larger than 0 degree and less than 90 degrees.

4. The display device as claimed in claim 1, wherein a projection of the active layer onto a horizontal plane has an area of 18 μ

m² and 77 μ

m².

5. The display device as claimed in claim 4, wherein a length in the first direction of the projection is between 6 μ

m and 11 μ

m, or wherein a length in the second direction of the projection is between 3 μ

m and 7 μ

m.

6. The display device as claimed in claim 2, wherein the switch connects to a pixel, and the pixel comprises a first passivation layer disposed on the drain electrode, a planarization layer disposed on the first passivation layer, a first electrode disposed on the planarization layer, a second passivation layer disposed on the first electrode, and a second electrode disposed on the second passivation layer, wherein the second electrode comprises at least two finger portions, and a connecting portion, and the finger portions connect to each other via the connecting portion.

7. The display device as claimed in claim 6, wherein each finger portion has a width between 2.25 μ

m and 2.75 μ

m.

8. The display device as claimed in claim 6, wherein a distance between any two adjacent finger portions is between 2.9 μ

m and 4.5 μ

m.

9. The display device as claimed in claim 6, wherein a sum of a distance between the finger portion and the data line and a width of the data line is between 7.6 μ

m and 9.0 μ

m.

10. The display device as claimed in claim 6, wherein a distance between the finger portions of the second electrode of any two adjacent pixels is between 9.5 μ

m and 12 μ

m.

11. The display device as claimed in claim 6, wherein a thickness of the second passivation layer is between 900 Å

and 1700 Å

.

12. The display device as claimed in claim 6, wherein a first opening is disposed within the first electrode, a second opening is disposed within the planarization layer, and a third opening is disposed within the first passivation layer.

13. The display device as claimed in claim 12, wherein a maximum width of the first opening is between 4 μ

m and 10.5 μ

m.

14. The display device as claimed in claim 12, wherein a maximum width of the second opening is between 3.7 μ

m and 7.5 μ

m.

15. The display device as claimed in claim 12, wherein a maximum width of the third opening is between 2.5 μ

m and 4.5 μ

m.

16. The display device as claimed in claim 12, wherein, in the first opening, the second electrode is separated from an edge of the drain electrode by a gap.

17. The display device as claimed in claim 12, wherein a boundary of the second opening intersects a boundary of the third opening at two points of intersection.

18. The display device as claimed in claim 12, wherein, in the second opening, the second electrode is separated from an edge of the planarization layer by a distance.

19. The display device as claimed in claim 6, wherein a ratio between a length of the pixel and a width of the pixel is between 2.8 and 3.2, and wherein the length of the pixel is between 40 μ

m and 70 μ

m, and width of the pixel is between 14 μ

m and 23 μ

m.

20. The display device as claimed in claim 6, wherein the area of the pixel is between 600 μ

m² and 1600 μ

m².