IP Library Granted Patent US 8,421,964
Granted Patent B2
US 8,421,964 · App. 13/557,710 · Granted Apr 16, 2013

Liquid crystal display device

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Quick Facts
Patent No.
US 8,421,964
App. No.
13/557,710
Granted
Apr 16, 2013
Kind
B2
Abstract

A liquid crystal display device includes a TFT substrate having a display area in which pixels each wutg a pixel electrode and a TFT are arranged in a matrix form, a counter substrate disposed opposite to the TFT substrate, a sealing material formed in the periphery to bond the TFT substrate and the counter substrate, and a liquid crystal layer interposed between an orientation film formed on the TFT substrate and an orientation film formed on the counter substrate. A first, second or third color filter is formed corresponding to each of the pixels in the display area of the TFT substrate, and an orientation film stopper is formed by an overlapping portion of the first, second or third color filter, outside of the display area. A profile of the orientation film formed on the TFT substrate is defined by the orientation film stopper.

Claims (30)

1. A liquid crystal display device comprising:

a TFT substrate including a display area in which pixels each having a pixel electrode and a TFT are arranged in a matrix form;

a counter substrate disposed opposite to the TFT substrate;

a sealing material formed in the periphery to bond the TFT substrate and the counter substrate together; and

a liquid crystal layer interposed between an orientation film formed on the TFT substrate and an orientation film formed on the counter substrate;

wherein a first color filter, a second color filter, or a third color filter is formed corresponding to each of the pixels in the display area of the TFT substrate;

wherein an orientation film stopper is formed by an overlapping portion of the first color filter, the second color filter, or the third color filter, in an area between the display area and the sealing material; and

wherein a profile of the orientation film formed on the TFT substrate is defined by the orientation film stopper.

2. The liquid crystal display device according to claim 1 , wherein the orientation film stopper is formed of two layers of color filters.

3. The liquid crystal display device according to claim 1 , wherein the orientation film stopper is formed of three layers of color filters.

4. A liquid crystal display device comprising:

a TFT substrate including a display area in which pixels each having a pixel electrode and a TFT are arranged in a matrix form;

a counter substrate disposed opposite to the TFT substrate;

a sealing material formed in the periphery to bond the TFT substrate and the counter substrate together;

a liquid crystal layer interposed between an orientation film formed in the TFT substrate and an orientation film formed in the counter substrate; and

a columnar spacer for defining a distance between the TFT substrate and the counter substrate;

wherein a first color filter, a second color filter, or a third color filter is formed corresponding to each of the pixels in the display area of the TFT substrate;

wherein a first orientation film stopper is formed by an overlapping portion of the first color filter, the second color filter, or the third color filter, in an area between the display area of the TFT substrate and the sealing material;

wherein a profile of the orientation film formed in the TFT substrate is defined by the first orientation film stopper;

wherein a second orientation film stopper is formed by the same process of the columnar spacer in an area between a display area of the counter substrate and the sealing material; and

wherein a profile of the orientation film formed in the counter substrate is defined by the second orientation film stopper.

5. A liquid crystal display device comprising:

a TFT substrate including a display area in which pixels each having a pixel electrode and a TFT are arranged in a matrix form;

a counter substrate disposed opposite to the TFT substrate;

a sealing material formed in the periphery to bond the TFT substrate and the counter substrate together; and

a liquid crystal layer interposed between an orientation film formed in the TFT substrate and an orientation film formed in the counter substrate;

wherein a first color filter, a second color filter, or a third color filter is formed corresponding to each of the pixels in the display area of the TFT substrate;

wherein a light shielding film is formed on the TFT, in addition to the first color filter, the second color filter, or the third color filter;

wherein an orientation film stopper is formed by an overlapping portion of the light shielding film and the first color filter, the second color filter, or the third color filter, in an area between the display area and the sealing material; and

wherein a profile of the orientation film formed in the TFT substrate is defined by the orientation film stopper.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 10, 2025
From: JAPAN DISPLAY INC
To: MAGNOLIA PURPLE CORPORATION
Reel/Frame 071890/0202 →
CHANGE OF NAME Recorded Nov 17, 2023
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 065614/0223 →
CHANGE OF NAME Recorded Nov 17, 2023
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065614/0644 →
CHANGE OF ADDRESS Recorded Nov 17, 2023
From: JAPAN DISPLAY, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065654/0250 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 17, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 065615/0327 →