Patent ID: 8937655
Filing Date: 2015-01-20
Classification: G02B

Abstract:
1. A method for positioning a phase retarder substrate comprising the following steps of: providing a phase retarder substrate comprising a first align mark which comprises a patterned phase retarder film; disposing an image capturing unit at one side of the phase retarder substrate; disposing a light source at the other side of the phase retarder substrate; disposing an upper polarizing sheet between the image capturing unit and the patterned phase retarder film, and disposing a lower polarizing sheet between the light source and the patterned phase retarder film; and emitting a light to the patterned phase retarder film by the light source, and then capturing an image of the light which passes through the lower polarizing sheet, the patterned phase retarder film and the upper polarizing sheet by the image capturing unit so as to position the phase retarder substrate.