Display device comprising a microcavity wherein a polarizer, a pixel electrode, a common electrode, a roof layer, and a liquid crystal layer are not disposed in a transparent region

Patent metadata

Field	Value
Publication number	US-9658481-B2
Application number	US-201314109746-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Aug 9, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

The present invention relates to a display device with improved transparency and appearance, and the display device according to an example embodiment of the present invention includes: a substrate including a plurality of pixel areas having a transparent region and a liquid crystal driving region; a thin film transistor formed on the substrate; a pixel electrode connected to the thin film transistor; a common electrode formed in the liquid crystal driving region on the pixel electrode so as to be spaced apart from the pixel electrode with a microcavity therebetween; a roof layer formed on the common electrode; an injection hole formed in the common electrode and the roof layer so as to expose the microcavity; a liquid crystal layer filling the microcavity; and an overcoat formed on the roof layer so as to cover the liquid crystal injection hole to seal the microcavity, wherein the pixel electrode, the common electrode, the roof layer, and the liquid crystal layer are formed in the liquid crystal driving region.

First claim

What is claimed is:

1. A display device comprising:
a substrate including a plurality of pixel areas having a transparent region and a liquid crystal driving region;
a first polarizer disposed on the substrate;
a thin film transistor disposed on the substrate;
a pixel electrode connected to the thin film transistor;
a common electrode disposed in the liquid crystal driving region on the pixel electrode so as to be spaced apart from the pixel electrode with a microcavity therebetween;
a roof layer disposed on the common electrode such that the common electrode and the pixel electrode are on the same side of the roof layer;
a liquid crystal layer disposed in the microcavity; and
an overcoat disposed on the roof layer to seal the microcavity,
wherein the first polarizer, the pixel electrode, the common electrode, the roof layer, and the liquid crystal layer are disposed in the liquid crystal driving region, and
wherein the first polarizer, the pixel electrode, the common electrode, the roof layer, and the liquid crystal layer are not disposed in the transparent region.

2. The display device of claim 1 , further comprising
a color filter disposed in the liquid crystal driving region.

3. The display device of claim 2 , further comprising
a light blocking member disposed along an outer edge of the liquid crystal driving region.

4. The display device of claim 3 , wherein
the color filter and the light blocking member are not disposed in the transparent region.

5. The display device of claim 1 , wherein
the transparent region is disposed at 10% to 50% of the pixel area.

6. The display device of claim 1 , further comprising:
a second polarizer disposed on the overcoat.

7. The display device of claim 6 , wherein
the transmissive axis of the first polarizer and the transmissive axis of the second polarizer are parallel.

8. The display device of claim 6 , wherein
the transmissive axis of the first polarizer and the transmissive axis of the second polarizer are crossed.

9. The display device of claim 1 , wherein
the first polarizer is a metal wire grid polarizer.

10. The display device of claim 6 , wherein
the second polarizer is a metal wire grid polarizer.

11. The display device of claim 6 , wherein
the second polarizer is disposed in the liquid crystal driving region, and the second polarizer is not disposed in the transparent region.

12. The display device of claim 1 , wherein:
a plurality of pixel areas are disposed in a matrix shape; and
the transparent region and the liquid crystal driving region are disposed to be adjacent in a column direction.

13. The display device of claim 12 , wherein
the transparent regions of pixel areas adjacent in a column direction are disposed to be adjacent.

14. The display device of claim 13 , wherein:
the liquid crystal driving region is disposed at an upper side and the transparent region is disposed at a lower side in a pixel area of an odd-numbered row; and
the transparent region is disposed at the upper side and the liquid crystal driving region is disposed at the lower side in a pixel area of an even-numbered row.

15. The display device of claim 1 , further including a plurality of gate lines and a plurality of data lines that cross the gate lines, wherein the pixel area is defined as a region between two adjacent gate lines and two adjacent data lines.

16. A display device comprising:
a substrate including a plurality of pixel areas having a transparent region and a liquid crystal driving region;
a first polarizer disposed on the substrate;
a thin film transistor disposed on the substrate;
a pixel electrode connected to the thin film transistor;
a common electrode disposed in the liquid crystal driving region on the pixel electrode so as to be spaced apart from the pixel electrode with a microcavity therebetween;
a roof layer disposed on the common electrode;
a liquid crystal layer disposed in the microcavity;
an overcoat disposed on the roof layer so as to seal the microcavity and
a second polarizer disposed on the overcoat,
wherein the pixel electrode, the common electrode, the roof layer, the liquid crystal layer, and the second polarizer are disposed in the liquid crystal driving region, and
wherein the pixel electrode, the common electrode, the roof layer, the liquid crystal layer, and the second polarizer are not disposed in the transparent region.

17. The display device of claim 16 , wherein
the first polarizer is disposed in the liquid crystal driving region and the transparent region.

18. The display device of claim 16 , wherein
the second polarizer is a metal wire grid polarizer.

Assignees

• Samsung Display Co Ltd

Inventors

• Won Byeong-Hee
• Yun Hae Ju
• Kang Ha-Yun

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02F1/133377 Primary

  Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel · CPC title

• G02F2001/134318

  Physics · mapped topic

• G02F1/1335 Primary

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title