Display apparatus

Patent metadata

Field	Value
Publication number	US-10921652-B2
Application number	US-201916252941-A
Country	US
Kind code	B2
Filing date	Jan 21, 2019
Priority date	Jan 22, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A display apparatus includes a first base substrate (BS), a second BS facing the first BS, a liquid crystal layer disposed between the first BS and the second BS, a color filter layer, pixel electrodes, a light-shielding column spacer, a common electrode, and trap electrodes. The first BS includes a display area and a non-display area. The color filter layer is disposed on the first BS in the display area. The pixel electrodes are disposed on the color filter layer. The light-shielding column spacer is disposed on the first BS in the non-display area and includes a light-shielding material. The common electrode is disposed on the second BS and faces the pixel electrodes. The liquid crystal layer is disposed between the common electrode and the pixel electrodes. The trap electrodes are disposed on a lower portion of the light-shielding column spacer and face the common electrode.

First claim

What is claimed is:

1. A display apparatus comprising:
a first base substrate comprising a display area and a non-display area;
a second base substrate configured to face the first base substrate;
a liquid crystal layer disposed between the first base substrate and the second base substrate;
a color filter layer disposed on the first base substrate in the display area;
pixel electrodes disposed on the color filter layer;
a light-shielding column spacer disposed on the first base substrate in the non-display area, the light-shielding column spacer comprising a light-shielding material;
a common electrode disposed on the second base substrate and configured to face the pixel electrodes, the liquid crystal layer disposed between the common electrode and the pixel electrodes; and
trap electrodes disposed on a lower portion of the light-shielding column spacer and facing the common electrode.

2. The display apparatus of claim 1 , wherein:
the common electrode is configured to receive a common voltage; and
the trap electrodes are configured to receive a trap voltage having a lower potential than the common voltage.

3. The display apparatus of claim 2 , further comprising:
a sealing member disposed between the first base substrate and the second base substrate, the sealing member bonding the first base substrate and the second base substrate and sealing the liquid crystal layer,
wherein the sealing member is disposed on the light-shielding column spacer in the non-display area.

4. The display apparatus of claim 3 , further comprising:
a first alignment layer disposed on the light-shielding column spacer in the non-display area and spaced apart from the sealing member so as not to overlap the sealing member in a plan view; and
a second alignment layer disposed on the common electrode in the non-display area and spaced apart from the sealing member so as not to overlap the sealing member in the plan view.

5. The display apparatus of claim 1 , wherein:
the display area has a quadrilateral shape defined in a first direction and a second direction perpendicular to the first direction; and
the trap electrodes are disposed adjacent to four corners of the display area.

6. The display apparatus of claim 5 , further comprising:
gate lines disposed on the first base substrate in the display area and extending in the first direction;
data lines disposed on the first base substrate in the display area and extending in the second direction; and
a gate driver disposed on the non-display area, the gate driver being configured to provide a gate signal to the display area.

7. The display apparatus of claim 6 , wherein:
the gate driver comprises at least one among first and second gate drivers respectively connected to opposing ends of the gate lines;
each of the first and second gate drivers comprises:
a shift register configured to generate the gate signal; and
a first off voltage line configured to provide a first off voltage to the shift register.

8. The display apparatus of claim 7 , wherein the trap electrodes are electrically connected to the first off voltage line and configured to receive the first off voltage.

9. The display apparatus of claim 7 , further comprising:
a shielding electrode disposed on the first base substrate in the display area and extending along at least one of the gate lines and the data lines, the shielding electrode being configured to receive a shielding voltage having an equivalent potential to the common voltage.

10. The display apparatus of claim 9 , wherein each of the trap electrodes comprises:
first sub-trap electrodes electrically connected to the first off voltage line and configured to receive the first off voltage; and
second sub-trap electrodes connected to the shielding electrode and configured to receive the shielding voltage.

11. The display apparatus of claim 10 , wherein the first and second sub-trap electrodes are alternately disposed in the first direction and the second direction.

12. The display apparatus of claim 7 , wherein each of the trap electrodes comprises:
first sub-trap electrodes electrically connected to the first off voltage line and configured to receive the first off voltage; and
second sub-trap electrodes in an electrically floating state.

13. The display apparatus of claim 12 , wherein the first and second sub-trap electrodes are alternately disposed in the first direction and the second direction.

14. The display apparatus of claim 7 , wherein each of the first and second gate drivers comprises a third off voltage line configured to provide a second off voltage to the shift register.

15. The display apparatus of claim 14 , wherein the trap electrodes are electrically connected to the third off voltage line and configured to receive the second off voltage.

16. The display apparatus of claim 14 , wherein each of the trap electrodes comprises:
first sub-trap electrodes electrically connected to the first off voltage line and configured to receive the first off voltage; and
second sub-trap electrodes electrically connected to the third off voltage line and configured to receive the second off voltage.

17. The display apparatus of claim 1 , wherein:
the display area comprises pixel areas and a non-pixel area outside the pixel areas; and
the color filter layer comprises:
red, green, and blue color filters disposed on the pixel areas and respective portions of the non-pixel area; and
a dummy color filter disposed on the red, green, and blue color filters in the non-pixel area.

18. The display apparatus of claim 17 , wherein:
the dummy color filter is disposed in an area in which a transistor is formed in the non-pixel area; and
the light-shielding column spacer comprises a protrusion part configured to support the second base substrate in the area in which the dummy color filter is formed.

19. The display apparatus of claim 1 , further comprising:
an organic insulation layer configured to cover the color filter layer,
wherein the pixel electrodes and the trap electrodes are disposed on the organic insulation layer.

20. The display apparatus of claim 1 , wherein, in a plan view, each of the trap electrodes has a quadrilateral shape.

21. The display apparatus of claim 1 , wherein, in a plan view, each of the trap electrodes has an “L” shape.

22. A display apparatus comprising:
a first base substrate comprising a display area and a non-display area;
a second base substrate configured to face the first base substrate;
a liquid crystal layer disposed between the first base substrate and the second base substrate;
a color filter layer disposed on the first base substrate in the display area and the non-display area;
pixel electrodes disposed on the color filter layer in the display area;
a low reflection column spacer disposed on the first base substrate in the non-display area, the low reflection column spacer comprising a low reflection material;
a common electrode disposed on the second base substrate and configured to face the pixel electrodes, the liquid crystal layer being disposed between the common electrode and the pixel electrodes; and
trap electrodes disposed between the common electrode and the color filter layer in the non-display area and facing the common electrode in a direction perpendicular to the first base substrate.

23. The display apparatus of claim 22 , wherein:
the display area comprises pixel areas and a non-pixel area

Assignees

• Samsung Display Co Ltd

Inventors

• Park Doyeong
• Na Byoungsun
• Ra Yoomi
• Ahn Kyusu
• James Richard
• Choi Kookhyun

Classifications

• G02F1/13394 Primary

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/1362

  Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} · CPC title

• G02F2201/123

  pixel · CPC title

• G02F2201/121

  common or background · CPC title

• G02F1/136222

  Colour filters incorporated in the active matrix substrate · CPC title