IP Library Granted Patent US 9,423,656
Granted Patent B2
US 9,423,656 · App. 13/920,377 · Granted Aug 23, 2016

Liquid crystal display and method for fabricating the same

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Quick Facts
Patent No.
US 9,423,656
App. No.
13/920,377
Granted
Aug 23, 2016
Kind
B2
Abstract

A liquid crystal display includes a first display panel having a light-transmitting region and a light-shielding portion, a second display panel that faces the first display panel with liquid crystals interposed between the first and second display panels and that includes a TFT substrate, a pixel electrode on the TFT substrate, a passivation film on the TFT substrate and the pixel electrode, and a common electrode patterned on the passivation film, and a trench in the passivation film within the light-shielding region between the first and second display panels. The trench encloses the light-transmitting region, and the common electrode is on the trench.

Claims (19)

1. A liquid crystal display, comprising:

a first display panel including a light-transmitting region and a light-shielding region;

a second display panel that faces the first display panel with liquid crystals interposed between the first and second display panels and that includes a TFT substrate, a pixel electrode on the TFT substrate, a passivation film on the TFT substrate and the pixel electrode, and a common electrode patterned on the passivation film; and

a trench in the passivation film within the light-shielding region between the first and second display panels, the trench overlapping the pixel electrode and enclosing the light-transmitting region, the trench being between the light-transmitting region and a data line within the light-shielding region in a direction perpendicular to a direction between the first and second display panels, and the common electrode being on the trench.

2. The liquid crystal display of claim 1 , wherein a bottom portion of the trench faces the pixel electrode.

3. The liquid crystal display of claim 2 , wherein a portion of the common electrode on a bottom portion of the trench has a shorter vertical spacing from the pixel electrode than another portion of the common electrode on the passivation film.

4. The liquid crystal display of claim 1 , wherein the first display panel includes:

a color filter in the light-transmitting region and a black matrix in the light-shielding region, which are positioned on a surface of a first substrate, and

an over-coat layer covering the color filter and the black matrix.

5. A liquid crystal display, comprising:

a first display panel including a light-transmitting region and a light-shielding region;

a second display panel that faces the first display panel with liquid crystals interposed between the first and second display panels and that includes a TFT substrate, a pixel electrode formed on the TFT substrate, a passivation film formed on the TFT substrate and the pixel electrode, and a common electrode patterned on the passivation film;

a trench in the passivation film within the light-shielding region between the first and second display panels, the trench overlapping the pixel electrode and enclosing the light-transmitting region, the trench being between the light-transmitting region and a data line within the light-shielding region in a direction perpendicular to a direction between the first and second display panels, and the common electrode being on the trench; and

a cell gap maintaining member having a cell gap maintaining member that includes a conductive material, that covers at least a portion of the common electrode, that contacts a surface of an over-coat layer, and that is on the trench.

6. The liquid crystal display of claim 5 , wherein the cell gap maintaining member includes the conductive material on a surface thereof.

7. The liquid crystal display of claim 6 , wherein the conductive material is a same material as the common electrode.

8. The liquid crystal display of claim 7 , wherein the conductive material is an indium tin oxide (ITO).

9. The liquid crystal display of claim 5 , wherein a bottom portion of the trench is formed at a location corresponding to the pixel electrode.

10. The liquid crystal display of claim 9 , wherein a portion of the common electrode on the bottom portion of the trench has a shorter vertical spacing from the pixel electrode than another portion of the common electrode on the passivation film.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 21, 2022
From: SAMSUNG DISPLAY CO., LTD.
To: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
Reel/Frame 060778/0543 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 18, 2013
From: CHO, SUNG HO
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 030633/0344 →