Liquid Crystal Display
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2005-Mar-31
Publishing Venue
IBM
Related People
Saitoh, Y: AUTHOR [+2]
Abstract
Disclosed is a Liquid Crystal Display (LCD) which can be used in both transmittance-type displays and reflective-type displays. Between liquid crystal display and backlight, Polymer Dispersed Liquid Crystal (PDLC), or Cholesteric Nematic Phase Change Liquid Crystal, is disposed to function as a reflector.
Liquid Crystal Display
Disclosed is
a Liquid Crystal Display (LCD) which can
be used in both transmittance-type displays and reflective-type
displays. Between liquid crystal display
and backlight, Polymer
Dispersed Liquid Crystal (PDLC), or Cholesteric Nematic Phase Change
Liquid Crystal, is disposed to function as a reflector.
The Figure shows an example of this device:
1.
is the liquid crystal device, which is a conventional
twist nematic type, Guest host
type, PDLC type, etc..
2.
is the PDLC reflector which can be applied to a certain
voltage thereon. At the ON state, the PDLC reflector
is transparent so that this
display is used as a
transmittance-type display. While at the OFF state, the
PDLC reflector acts as a diffuser
so that this display
is used as a reflective display.
3.
is a backlight, which is used only as a transmittance
display.
The
Cholesteric Nematic Phase Change Liquid Crystal is also
applicable as a reflector instead of the PDLC reflector.