Color liquid-crystal display unit with electrodes interleaved in vertical and horizontal directions

• US 4,902,103 A
• Filed: 08/10/1988
• Issued: 02/20/1990
• Est. Priority Date: 08/10/1987
• Status: Expired due to Fees

• Current Assignee: Koito Manufacturing Company Limited
• Original Assignee: Koito Manufacturing Company Limited
• Inventors: Miyake, Kazuyuki, Murata, Atsuhiko, Yoshimoto, Yuji
• Primary Examiner(s): James, Andrew J.
• Assistant Examiner(s): Thantu, Napoleon
• Application Number:
  US07/230,804
• Time in Patent Office: 559 Days
• Field of Search: 350/336, 350/339 F, 350/350 S, 350/392
• US Class Current: 349/144
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

A color liquid crystal display unit having improved resolution with good color mixing and little directivity. The display unit includes upper and lower light-transmissible substrates disposed in opposition to one another, scanning and signal electrodes formed on opposed surfaces of the substrates, color filters formed at a predetermined repetition interval on the signal electrodes, and a liquid crystal enclosed between the upper and lower substrates. At least one of the signal electrodes is divided into plural portions, and at least a portion of another signal electrode is interleaved therewith.

Claims

1. A color liquid-crystal display unit comprising:

upper and lower light-transmissible substrates disposed in opposition to each other;

a plurality of scanning and signal electrodes formed in a matrix pattern on said upper and lower substrates on respective surfaces thereof opposing one another;

color filters for predetermined colors formed at a predetermined repetition interval on at least one of upper and lower surfaces of said signal electrodes, intersecting portions of said scanning and signal electrodes on which said color filters are formed defining picture elements, in each of said picture elements a first of said signal electrodes having portions interleaved with a second of said signal electrodes in both horizontal and vertical directions; and

a liquid crystal enclosed between said upper and lower substrates.

2. The color liquid-crystal display unit of claim 1, wherein said first electrode has substantially a U shape in each of said picture elements with said second electrode interposed between sides of the U.

3. The color liquid-crystal display unit of claim 2, wherein said second electrode in each of said picture elements has first and second portions of different widths.

4. The color liquid-crystal display unit of claim 1, wherein said second electrode in each of said picture elements has first and second portions of different widths, said first electrode having first and second separated portions, said second electrode in each of said picture elements being interposed between said first and second separated portions of said first electrode.

5. The color liquid-crystal display unit of claim 4, wherein said second electrode has relatively wide end portions and a relatively narrow central portion joining said relatively wide end portions.

6. The color liquid-crystal display unit of claim 4, wherein said second electrode has relatively narrow end portions and a relatively wide central portion joining said relatively wide end portions.

7. The color liquid-crystal display unit of claim 4, wherein said one end of said second electrode is relatively narrow and the other end of said second electrode is relatively wide.