A reflective liquid crystal device comprises in sequence a linear polariser, a retarder arrangement comprising two retarders, and a reflector. A first of the retarders provides a retardation of m lambda /2 and a second of the retarders provides a retardation of n(/4, where m is an integer and n is an odd integer, and wherein at least one of the first and second retarders comprises a Bistable Twisted Nematic (BTN) liquid crystal. This BTN retarder is switchable between a first state in which the retarder provides a retardation of m lambda /2 or n lambda /4 and a second state in which the retardation is zero.
申请公布号
WO0070394(A2)
申请公布日期
2000.11.23
申请号
WO2000JP03118
申请日期
2000.05.15
申请人
SHARP KABUSHIKI KAISHA;ACOSTA, ELIZABETH, JANE;TILLIN, MARTIN, DAVID;TOWLER, MICHAEL, JOHN
发明人
ACOSTA, ELIZABETH, JANE;TILLIN, MARTIN, DAVID;TOWLER, MICHAEL, JOHN