Resources Contact Us Home
Reflecting type liquid crystal display device

Image Number 10 for United States Patent #6429920.

An object of the invention is to obtain achromatic display with high contrast and high lightness. A reflection type liquid crystal display device of NB mode comprises a liquid crystal cell having an STN type liquid crystal layer; a first phase difference plate; a second phase difference plate; a polarizing plate, the first and second phase difference plates and polarizing plate being disposed on one surface of the liquid crystal cell in this order; and a reflecting layer disposed in the liquid crystal cell, the reflecting layer forming the other surface of the liquid crystal cell. The liquid crystal layer retardation .DELTA.nLC.dLC, the first phase difference plate retardation .DELTA.n1.d1 and the second phase difference plate retardation .DELTA.n2.d2 are selected from the ranges of 660 nm to 830 nm, 120 nm to 240 nm and 300 nm to 430 nm, respectively. A twist angle .chi. is selected from the range of to Predetermined angles .theta., .phi. and .phi. are selected from the ranges of to -75 , to and to, respectively.

  Recently Added Patents
Semiconductor memory system having ECC circuit and controlling method thereof
Image processing device, printing apparatus, image processing method, and method of producing printing apparatus
Organic elelectroluminescent display
High performance strained source-drain structure and method of fabricating the same
Method for computing an energy efficient route
Automatic image-content based adjustment of printer printing procedures
Haworthia plant named `CAPETOWN`
  Randomly Featured Patents
Direct memory access control system for a digital scanner
Techniques for cooling a circuit board component
Safety apparatus and method for riding an animal
Vehicle door
Articulating device
Priority arbiter with shifting sequential priority scheme
Radar detector
Cosmetic container
Retainer for filamentary material wound on a spool
Switch gear cell and converter circuit for switching a multiplicity of voltage levels with a switchgear cell such as this