Title:
液晶表示装置
Document Type and Number:
Japanese Patent JP3738773
Kind Code:
B2
Abstract:
The present invention is configured so that it has a first substrate, a second substrate, a liquid crystal layer pinched between the first substrate and second substrate, and a driving unit, wherein a characteristic of a reflectivity versus an applied voltage is a normally closed type and a characteristic of a transmissivity versus an applied voltage is the normally closed type: wherein the first substrate has a common electrode, and an upside polarization plate and upside phase plate on an upper surface; wherein the second substrate has a reflective electrode and transparent electrode connected with an active element, and a downside polarization plate and downside phase plate on a lower surface; wherein the liquid crystal layer has a twist angle not less than 40 degrees and not more than 65 degrees; wherein a retardation of the liquid crystal layer in a reflective display unit is within a range of not less than 230 nm and not more than 300 nm; and wherein a retardation of the liquid crystal layer in a transmissive display unit is larger than the retardation of the liquid crystal layer in the reflective display unit. Thus, is obtained a display that is more luminous and wider in a light reproduction range under a wide range of luminous environments ranging from a dark place to direct sunlight.
Inventors:
Osamu Ito
Hiroko Hayada
Koichi Abu
Shinichi Komura
Hiroko Hayada
Koichi Abu
Shinichi Komura
Application Number:
JP2003521436A
Publication Date:
January 25, 2006
Filing Date:
August 02, 2002
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G02F1/1335; G02B5/30; G02F1/13363; G02F1/139; G02F1/1333
Domestic Patent References:
| JP11242226A | ||||
| JP2001033780A | ||||
| JP2000187220A | ||||
| JP2001042128A | ||||
| JP7191313A |
Attorney, Agent or Firm:
Yasuo Sakuta