Title:
LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP3294988
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a liquid crystal display device having an excellent contrast characteristic and paper white characteristic by providing a surface for reflecting the light of a reflection layer with ruggedness and specifying the ratio of the area of the region having the angle below a specified value of inclination of the tangent of the ruggedness to the surface to the area of the substrates to be in a specified range.
SOLUTION: The reflection type LCD 20 has a polarizing plate 22, a phase difference plate 23 and a liquid crystal cell 20a in this order. The liquid crystal cell 20a has the upper substrate 26, the lower substrate (reflection substrate) 25 and the liquid crystal layer 24 held between the upper substrate 26 and the lower substrate 25. The lower substrate 25 has plural projecting parts 32, high-polymer resin layers 33 covering these projecting parts 32, the reflection layer 34 and an oriented film 35 in this order on the surface of the transparent substrate 31 on the liquid crystal layer 24 side. The reflection plate and polarizing plate 22 of the device are disposed on the different sides of the liquid crystal layer. The surface which reflects light of the reflection layer 34 has the ruggedness and the ratio of the area of the region having <2° angle of inclination of the tangent of the ruggedness to the surface to the area of the substrate is 20 to 60%.
Inventors:
Kozo Nakamura
Kazuhiko Tsuda
Kazuhiko Tsuda
Application Number:
JP7078996A
Publication Date:
June 24, 2002
Filing Date:
March 26, 1996
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G02F1/137; G02F1/1333; G02F1/1335; (IPC1-7): G02F1/1335; G02F1/1333; G02F1/137
Domestic Patent References:
| JP611711A | ||||
| JP3223715A | ||||
| JP4243226A | ||||
| JP5232465A | ||||
| JP675238A | ||||
| JP56156865A | ||||
| JP4315129A | ||||
| JP5323371A | ||||
| JP5281533A | ||||
| JP4267220A | ||||
| JP5971081A | ||||
| JP5979280A | ||||
| JP5173158A | ||||
| JP7218906A | ||||
| JP736030A | ||||
| JP6175126A |
Attorney, Agent or Firm:
Shusaku Yamamoto