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US 5,742,369 AGranted
Method of aligning liquid crystals by applying an alternating electric field under periodically changing temperature
AssigneeCanon Kabushiki Kaisha
InventorsTadashi Mihara, Yukio Hanyu, Sunao Mori
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Abstract
A method of aligning liquid crystals includes the steps of aligning chiral smectic liquid crystal sandwiched between a pair of substrates each having an electrode by applying an alternating electric field between the substrates under periodically changing temperature conditions in which a width of changes of the temperature for a single period differs in every period.
Claims26
A method of aligning liquid crystals, said method comprising the step of:
- treating chiral smectic liquid crystal sandwiched between a pair of substrates each having an electrode by applying an alternating electric field between the substrates under periodically changing temperature conditions in which a width of changes of the temperature for a single period differs in every period,
- wherein in the temperature conditions, a minimum temperature value of each period is fixed while a maximum temperature value is varied at every period.
A method of manufacturing liquid crystal devices, said method comprising the steps of:
- forming a liquid crystal cell in which a pair of electrode substrates oppose each other with a gap therebetween;
- injecting chiral smectic liquid crystal between the substrates in the cell;
- and
- applying an alternating electrical field to the electrode substrates under periodically changing temperature conditions in which a width of changes of the temperature for a single period differs in every period, wherein in the temperature conditions in which the alternating electric field is applied, a minimum temperature value of each period is fixed while a maximum temperature value is varied at every period.
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Dependencies are inferred from the claim text.