Patent ID: 6624863
Filing Date: 2003-09-23
Classification: G02B,G02F,H04N

Abstract:
A method of making a patterned retarder, comprising the steps ofproviding an alignment layer, rubbing the alignment layer in a first rubbing direction, masking with a mask at least one first region of the alignment layer which has undergone said rubbing in the first direction, to reveal at least one second region of the alignment layer which has also undergone said rubbing in the first direction, rubbing the at least one second region through the mask in a second rubbing direction different from the first rubbing direction and at an acute angle, or obtuse angle from the first rubbing direction, removing the mask, disposing on the alignment layer a layer of birefringent material whose optic axis is aligned by the alignment layer, and fixing the optic axis of the birefringent layer.