IP Library Granted Patent US 11,029,567
Granted Patent B2
US 11,029,567 · App. 16/429,639 · Granted Jun 8, 2021

Liquid crystal panel having an electrode with a bent portion

Inventors: Yoshihiro Sakurai (Kanagawa, JP); Hironao Tanaka (Kanagawa, JP); Harumi Okuno (Kanagawa, JP); Takeo Koito (Kanagawa, JP)
Assignee: Japan Display Inc.
G02F1/1337G02F1/133707G02F1/134363G02F1/134372G02F1/133749
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Quick Facts
Patent No.
US 11,029,567
App. No.
16/429,639
Granted
Jun 8, 2021
Kind
B2
Abstract

A liquid crystal panel includes pixels arranged in first and second directions and having a pixel region and including: first and second electrodes; and an alignment film having an alignment direction, wherein the first electrode has: a plurality of electrode branches each having first and second ends in the first direction; a slit between adjacent two branches; a first connection connecting the first ends; a second connection connecting the second ends; and a contact hole adjacent to second connection, wherein the first electrode has areas including: a main portion; and a bent portion that is adjacent to the contact hole and that includes the second end, the bent portion being bent relative to main portion at an angle not less than 7 degrees with respect to alignment direction, wherein an area ratio of the bent portion relative to entire area of the pixel region is not more than 50%.

Claims (44)

1. A liquid crystal panel comprising:

a first substrate and a second substrate with a liquid crystal layer therebetween; and

a plurality of pixels arranged in a first direction and a second direction crossing the first direction, each of the pixels having a pixel region and including:

a first electrode;

a second electrode disposed between the first electrode and the first substrate; and

an alignment film having an alignment direction,

wherein the first electrode has:

a plurality of electrode branches each having a first end and a second end in the first direction;

a slit between adjacent two branches;

a first connection connecting the first ends of the electrode branches;

a second connection connecting the second ends of the electrode branches; and

a contact hole disposed adjacent to the first connection,

wherein the first electrode has areas including a first bent portion, a second bent portion, and a main portion that is disposed between the first bent portion and the second bent portion in a longitudinal direction of the first electrode,

wherein the first bent portion is adjacent to the contact hole and includes the first end, the first bent portion being bent relative to the main portion along the first bending point line of the first electrode in such a manner that the first bent portion is bent at a first angle that is not less than 7 degrees and not more than 15 degrees with respect to the alignment direction,

wherein the second bent portion is bent relative to the main portion along a second bending point line of the first electrode, in an area close to the second ends of the branches,

wherein the second connection of the first electrode connects the second ends in the second bent portion, the second ends being adjacent to each other in the second direction,

wherein a direction of the first bent portion is substantially parallel to a direction of the second bent portion, and

wherein an area ratio of the first bent portion relative to an entire area of the pixel region is not more than 50%.

wherein an area ratio of the first bent portion relative to an entire area of the pixel region is not more than 50%.

2. The liquid crystal panel according to claim 1 , wherein the first electrode and the second electrode are arranged on the first substrate.

3. The liquid crystal panel according to claim 1 , wherein the first electrode and the second electrode are arranged in different layers.

4. The liquid crystal panel according to claim 1 , wherein the first electrode and the second electrode are arranged in a same layer.

5. The liquid crystal panel according to claim 1 , wherein the second bent portion is bent at a second angle that is not less than 7 degrees and not more than 15 degrees relative to the alignment direction of the liquid crystal layer.

6. The liquid crystal panel according to claim 1 , further comprising:

a plurality of scanning lines and a plurality of signal lines surrounding each of the pixels,

at least one second end of the first electrode in each of the pixels is overlapped by a corresponding scanning line.

7. The liquid crystal panel according to claim 1 , further comprising:

a plurality of scanning lines and a plurality of signal lines surrounding each of the pixels,

the main portions of the first electrodes are arranged in parallel with the signal lines.

8. The liquid crystal panel according to claim 7 ,

wherein the first bent portions of the first electrodes are arranged not parallel with the signal lines.

9. The liquid crystal panel according to claim 1 ,

wherein the branches and a plurality of the slits are arranged in both the main portion and the first bent portion, and

wherein, in the main portion, the branches and the slits extend straight toward the first bent portion.

10. The liquid crystal panel according to claim 8 ,

wherein the branches and a plurality of the slits are arranged in both the main portion and the first bent portion, and

wherein, in the main portion, the branches and the slits extend straight toward the first bent portion.

11. The liquid crystal panel according to claim 1 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

12. The liquid crystal panel according to claim 7 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

13. The liquid crystal panel according to claim 8 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

14. The liquid crystal panel according to claim 9 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

15. The liquid crystal panel according to claim 1 ,

wherein the first bent portion and the second bent portion are bent relative to the alignment direction such that:

the first bending point line is positioned, shifted relative to the first connection along the second direction; the second bending point line is positioned, shifted relative to the first folding line along the second direction; and the second connection is positioned, shifted relative to the second bending point line along the second direction.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2025
From: JAPAN DISPLAY INC.
To: MAGNOLIA WHITE CORPORATION
Reel/Frame 072130/0313 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 2, 2021
From: SAKURAI, YOSHIHIRO; TANAKA, HIRONAO; OKUNO, HARUMI; KOITO, TAKEO
To: SONY CORPORATION
Reel/Frame 055110/0268 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 2, 2021
From: SONY CORPORATION
To: JAPAN DISPLAY WEST INC.
Reel/Frame 055110/0333 →
CHANGE OF NAME Recorded Feb 2, 2021
From: JAPAN DISPLAY WEST INC.
To: JAPAN DISPLAY INC.
Reel/Frame 055196/0019 →
Priority Claims (1)
JP 2008-324781 · Dec 19, 2008 · national
Continuity (4)
Continuation 15955042 · Apr 17, 2018
Continuation 14263586 · Apr 28, 2014
Division 12640906 · Dec 17, 2009
Related Publication 20190293977A1 · Sep 26, 2019