Liquid crystal display apparatus

• US 20050140620A1
• Filed: 02/11/2005
• Published: 06/30/2005
• Est. Priority Date: 03/29/2001
• Status: Active Grant

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Komura, Shinichi, Utsumi, Yuka, Aoyama, Tetsuya
• Granted Patent: US 7,180,490 B2
• Time in Patent Office: Days
• US Class Current: 345/87
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

A liquid crystal display apparatus includes a substrate and a second substrate with a liquid crystal layer sandwiched therebetween. A plurality of pixels are sandwiched between the two substrates and form a display section, each of the pixels is provided with first and second pixel electrodes both corresponding to the pixel, and a common electrode corresponding to the first and second pixel electrodes.

Claims

1. A liquid crystal display apparatus, comprising:

a first substrate;

a second substrate arranged opposite the first substrate;

a liquid crystal layer sandwiched between said first substrate and said second substrate; and

a plurality of pixels which are sandwiched between said first substrate and said second substrate and form a display section,

wherein each of said pixels is provided with a first pixel electrode and a second pixel electrode both corresponding to said pixel, and a common electrode corresponding to said first and second pixel electrodes.

2. The liquid crystal display apparatus according to claim 1, wherein said first pixel electrode, said common electrode, and said second pixel electrode are disposed on said first substrate.

3. The liquid crystal display apparatus according to claim 2,

wherein in each pixel, said first pixel electrode and said common electrode are linear and are arranged substantially in parallel, and

at least part of said second pixel electrode overlaps said first pixel electrode or said common electrode.

4. The liquid crystal display apparatus according to claim 3,

wherein said second pixel electrode is linear, and

said second pixel electrode is as wide as or narrower than the first pixel electrode or common electrode, which is overlapped by the part of the second pixel electrodes.

5. The liquid crystal display apparatus according to claim 3,

wherein said second pixel electrode is linear, and

said second pixel electrode is wider than said first pixel electrodes or common electrode, which is overlapped by the part of the second pixel electrode.

6. The liquid crystal display apparatus according to claim 2,

wherein said first pixel electrode and said common electrode are linear and are arranged substantially in parallel, and

said second pixel electrode is located below said first pixel electrode and said common electrode, said second pixel electrode overlaps said first pixel electrode and said common electrode, and insulated films are disposed between said second pixel electrode and said first pixel electrode and between said second pixel electrode and said common electrode.

7. The liquid crystal display apparatus according to claim 2,

wherein said first pixel electrode and said second pixel electrode are linear and are arranged substantially in parallel, and

said common electrode is located between said first pixel electrode and said second pixel electrode.

8. The liquid crystal display apparatus according to claim 2,

wherein said first and said second pixel electrodes are linear and are arranged substantially in parallel, and

at least part of said common electrode overlaps said first or said second pixel electrode.

9. The liquid crystal display apparatus according to claim 2,

wherein said first and said second pixel electrodes are linear and are arranged substantially in parallel, and

said common electrode is located below said first and second pixel electrodes, said common electrode overlaps said first and said second pixel electrodes, and insulated films are disposed between said common electrode and said first pixel electrode and between said common electrode and said second pixel electrode.

10. The liquid crystal display apparatus according to claim 1,

wherein said first and said second pixel electrodes are disposed on said first substrate, and said common electrode is disposed on one of said first substrate and said second substrate.

11. The liquid crystal display apparatus according to claim 3,

wherein when the difference between the potentials provided to said first pixel electrode and to said common electrode is largest or smallest, the potential provided to said second pixel electrode is substantially equal to the potential provided to said first pixel electrode or common electrode, which is overlapped by said second pixel electrode.

12. The liquid crystal display apparatus according to claim 7,

wherein when the difference between the potentials provided to said first pixel electrode and to said common electrode is largest or smallest, the potential provided to said second pixel electrode is substantially equal to the potential provided to said first pixel electrode.