Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-04-15
1994-12-13
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359100, 2522994, G02F 11337
Patent
active
053733800
ABSTRACT:
Ferroelectric liquid crystal display comprising outer substrates, electrodes, polarizer(s), ferroelectric liquid crystalline material and alignment layer(s), in which the ferroelectric liquid crystalline material has a spontaneous polarization of Ps>20 nC.cm.sup.-2 and a natural helical pitch of less than half of the cell thickness, and the alignment layer comprises at least one lipophilizing, lipophilic and/or amphiphilic compound. The liquid crystal display according to the invention exhibits a short switching time and a significantly reduced surface memory effect, and thus achieves an improved display contrast.
REFERENCES:
patent: 5135678 (1992-08-01), Murata et al.
English Language specification identified by file number HOE 91/F 009 (which relates to WO92/13290 previously submitted).
HOE 90/F 120 specification (which relates to EP 0,453,966).
HOE 90/F 115 specification (which relates to EP 0, 451,822).
HOE 90/F 117 specification (which relates to EP 0,451,820).
HOE 89/F 377K specification (which also relates to EP 0,404,081).
Escher Claus
Harada Takamasa
Illian Gerd
Kaltbeitzel Anke
Rosch Norbert
Hoechst Aktiengesellschaft
Mai Huy
Sikes William L.
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