Title:
ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP3819651
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an active matrix type liquid crystal display device which adopts an IPS system using short pitch transparent comblike electrodes, and which realizes almost equal transmittance to that of a device using a liquid crystal material having negative dielectric anisotropy (comparable with a TN system) by using a liquid crystal having positive dielectric anisotropy which makes low driving voltage, fast response and lower cost possible.
SOLUTION: A liquid crystal composition used has positive dielectric anisotropy, ≥2.4 ratio of K11/K22, wherein K11 is the elastic modulus for splay deformation and K22 is the elastic modulus for twist deformation, and ≥8 dielectric anisotropy and ≤110 mPa.s rotational viscosity coefficient. The retardation d-Δ n is controlled to satisfy 0.28 μm<d.Δn<0.5 μm.
Inventors:
Shin Yoneya
Kikuo Ono
Hitoshi Oaku
Shintaro Takeda
Kikuo Ono
Hitoshi Oaku
Shintaro Takeda
Application Number:
JP29836099A
Publication Date:
September 13, 2006
Filing Date:
October 20, 1999
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G02F1/1368; G09G3/36; C09K19/02; G02F1/1337; G02F1/1343; G02F1/136; G02F1/137; G09F9/35; G09G3/20; (IPC1-7): G02F1/1368; C09K19/02; G02F1/1337; G02F1/1343; G02F1/137; G09F9/35; G09G3/20; G09G3/36
Domestic Patent References:
| JP11212095A | ||||
| JP7225388A | ||||
| JP10170939A | ||||
| JP7306417A | ||||
| JP63021907B1 | ||||
| JP11038438A | ||||
| JP9304781A |
Attorney, Agent or Firm:
Yusuke Hiraki
Previous Patent: THERMAL PRINT HEAD, HEATING RESISTOR AND MANUFACTURING METHOD FOR HEATING RESISTOR OF THERMAL PRINT ...
Next Patent: CARRYING DEVICE
Next Patent: CARRYING DEVICE