Liquid crystal display apparatus

• US 7,180,490 B2
• Filed: 02/11/2005
• Issued: 02/20/2007
• Est. Priority Date: 03/29/2001
• Status: Expired due to Fees

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi, Ltd.
• Inventors: Komura, Shinichi, Utsumi, Yuka, Aoyama, Tetsuya
• Primary Examiner(s): CHOW, DOON Y
• Application Number:
  US11/055,484
• Publication Number:
  US 20050140620A1
• Time in Patent Office: 739 Days
• Field of Search: 345/87, 345/90, 345/91, 345/92, 345/93, 345/103, 349/139, 349/141, 349/41, 349/56
• 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 the first substrate and the second substrate;

a plurality of pixels which are sandwiched between the first substrate and the second substrate and form a display section;

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

wherein the first and second pixel electrodes are disposed on the first substrate;

the first pixel electrodes and the second pixel electrodes have parts which are disposed alternatively within the pixel; and

wherein the common electrode is disposed between the second substrate and the first and second pixel electrodes so as to be superimposed on the first and second pixel electrodes on an entirety of the second substrate;

and potential applying means for adjusting a ratio of potentials applied to the common electrode, the first pixel electrode, and the second pixel electrode.

2. A liquid crystal display apparatus according to claim 1, wherein a dielectric is formed between the second pixel electrode and the second substrate.

3. A liquid crystal display apparatus according to claim 2, wherein the dielectric is one of a color filter and a flattened film.

4. A liquid crystal display apparatus according to claim 1, wherein the potential applying means applies potentials independently to the common electrode, the first pixel electrode, and the second pixel electrode, and adjusts the ratio of applied potentials, so as to suppress dependency of color tones on gradation.