Transparent display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9645434-B2
Application number	US-201414292521-A
Country	US
Kind code	B2
Filing date	May 30, 2014
Priority date	Oct 8, 2013
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

Discussed are a transparent display device and a manufacturing method thereof, which may reduce diffraction grating. The transparent display device includes gate lines and data lines formed on a substrate and crossing each other with a gate insulator film interposed therebetween to define pixel areas, common lines formed on the substrate and being parallel to the gate lines, thin film transistors formed in the respective pixel areas, pixel electrodes connected to the thin film transistors, and common electrodes connected to the common lines and alternating with the pixel electrodes. In the transparent display device, blocks between the pixel electrodes and the common electrodes are reduced or increased in width by an equal difference with increasing distance from both edges of each pixel area proximate to the data lines or by an equal difference with decreasing distance to the center of the pixel area.

First claim

What is claimed is:

1. A transparent display device comprising:
gate lines and data lines formed on a substrate, the gate lines and the data lines crossing each other with a gate insulator film interposed therebetween to define pixel areas;
common lines formed on the substrate, the common lines being parallel to the gate lines;
thin film transistors formed in the respective pixel areas;
pixel electrodes connected to the thin film transistors; and
common electrodes connected to the common lines, the common electrodes alternating with the pixel electrodes,
wherein a width of each block disposed between each of the pixel electrodes and the common electrodes is sequentially varied by an equal amount with an increasing distance from both edges of each pixel area to a center of the pixel area, and
wherein the equal amount is within a range of 0.5 μm to 1 μm.

2. The device according to claim 1 , wherein the blocks between the pixel electrodes and the common electrodes are symmetrical on the basis of the center between the two data lines proximate to both edges of the pixel area.

3. The device according to claim 1 , wherein the width of each block disposed between each of the pixel electrodes and the common electrodes is sequentially reduced or increased by an equal amount with an increasing distance from both edges of each pixel area to a center of the pixel area.

4. A transparent display device comprising:
gate lines and common lines on a substrate, the gate lines and the common lines being parallel to each other;
a gate insulator film on the substrate including the gate lines and the common lines;
data lines on the gate insulator film, the data lines crossing the gate lines to define pixel areas;
thin film transistors in the respective pixel areas;
a protective film on the substrate to cover the data lines and the thin film transistors;
pixel electrodes on the protective film within each pixel area, the pixel electrodes connected to the thin film transistors; and
common electrodes on the protective film within each pixel area, the common electrodes connected to the common lines, the common electrodes alternating with the pixel electrodes,
wherein a width of each block disposed between each of the pixel electrodes and the common electrodes is sequentially varied by an equal amount with an increasing distance from both edges of each pixel area to a center of the pixel area, and
wherein the equal amount is within a range of 0.5 μm to 1 μm.

5. The device according to claim 4 , further comprising:
drain contact holes in the protective film on drain electrodes of the thin film transistors; and
common contact holes in the protective film and the gate insulator film on the common lines,
wherein the pixel electrodes are connected to the drain electrodes of the thin film transistors through the drain contact holes, and the common electrodes are connected to the common lines through the common contact holes.

6. The device according to claim 4 , wherein the blocks between the pixel electrodes and the common electrodes are symmetrical on the basis of the center between the two data lines proximate to both edges of the pixel area.

7. The device according to claim 4 , wherein each of the pixel electrodes includes a pixel horizontal portion which constitutes a storage capacitor in a region overlapping the common line, and a plurality of pixel vertical portions protruding from the pixel horizontal portion, and
wherein each of the common electrode includes a plurality of common vertical portions alternating with the pixel vertical portions, and a common horizontal portion connecting the plurality of common vertical portions to one another.

8. The device according to claim 7 , wherein blocks between the pixel vertical portions and the common vertical portions are symmetrical on the basis of the center between the two data lines proximate to both edges of the pixel area.

9. The device according to claim 4 , wherein the width of each block disposed between each of the pixel electrodes and the common electrodes is sequentially reduced or increased by an equal amount with an increasing distance from both edges of each pixel area to a center of the pixel area.

10. A manufacturing method of a transparent display device, comprising:
forming gate lines and common lines on a substrate, the gate lines and the common lines being parallel to each other;
forming a gate insulator film on the substrate to cover the gate lines and the common lines;
forming data lines on the gate insulator film, the data lines crossing the gate lines to define pixel areas;
forming thin film transistors in the respective pixel areas;
forming pixel electrodes connected to the thin film transistors; and
forming common electrodes connected to the common lines, the common electrodes alternating with the pixel electrodes,
wherein a width of each block disposed between each of the pixel electrodes and the common electrodes is sequentially varied by an equal amount with an increasing distance from both edges of each pixel area to a center of the pixel area, and
wherein the equal amount is within a range of 0.5 μm to 1 μm.

11. The method according to claim 10 , wherein the blocks between the pixel electrodes and the common electrodes are symmetrical on the basis of the center between the two data lines proximate to both edges of the pixel area.

Assignees

• Lg Display Co Ltd

Inventors

• Park Ju-Un
• Lee Won-Ho
• Kim Tae-Han

Classifications

• G02F2201/123

  pixel · CPC title

• G02F1/133502

  Antiglare, refractive index matching layers · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title