Liquid crystal projection-type display device specific liquid crystal layer retardation and two alignment films having orientation directions 180 degrees different
AssigneeSharp Kabushiki Kaisha
InventorShinji Shimada
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Abstract
A liquid crystal electro-optical device comprising: a pair of insulating substrates; an electrode and an alignment film formed in this order on each of the insulating substrates; a liquid crystal layer interposed between the pair of insulating substrates, wherein the alignment film is a film capable of aligning the liquid crystal molecules in the liquid crystal layer perpendicularly with respect to the insulating substrates, and wherein the thickness of the liquid crystal layer is 45 to 70% of the twist pitch of the liquid crystal molecules.
Claims18
A liquid crystal electro-optical device comprising:
- a pair of parallel transparent insulating substrates;
- an electrode and an alignment film formed in this order on each of the insulating substrates;
- and
- a liquid crystal layer, having a predetermined thickness, interposed between the pair of insulating substrates,
- wherein
- each alignment film is a film capable of aligning the liquid crystal molecules in the liquid crystal layer perpendicularly with respect to the insulating substrates,
- the thickness of the liquid crystal layer is 45 to 70% of the twist pitch of the liquid crystal molecules, and
- the product of the thickness of the liquid crystal layer and the birefringence index of the liquid crystal layer is in the range of 200 nm to 350 nm.
A liquid crystal electro-optical device comprising:
- a pair of parallel transparent insulating substrates;
- an electrode and an alignment film formed in this order on each of the insulating substrates;
- and
- a liquid crystal layer interposed between the pair of insulating substrates,
- wherein each alignment film is a film capable of aligning the liquid crystal molecules in the liquid crystal layer perpendicularly with respect to the insulating substrates, and the pair of alignment films orient molecules of said liquid crystal layer along a line normal to said parallel substrates, in respective orientation directions which differ by 180.degree. with respect to each other, and
- the product of the thickness of the liquid crystal layer and the birefringence index of the liquid crystal layer is in the range of 200 nm to 350 nm.
Dependencies are inferred from the claim text.