Patent ID: 6252829
Filing Date: 2001-06-26
Classification: G02B,G02F,G04G

Abstract:
A display device in an electronic watch, comprising:a first polarization separator that transmits linearly polarized light polarized in a first direction and that does not transmit linearly polarized light polarized in a second direction perpendicular to said first direction;a polarization changing element disposed at a position to receive the linearly polarized light transmitted from said first polarizing separator, that selects between a state in which a polarization of the linearly polarized light is changed and a state in which the polarization is not changed;a second polarization separator, diametrically opposed to said first polarization separator with said polarization changing element interposed therebetween, that transmits linearly polarized light polarized in the second direction and reflects linearly polarized light polarized in a direction perpendicular to said second direction; anda light emitting element that emits light to said polarization changing element through said second polarization separator, wherein the electronic watch provides emissions of different colors in a color mixture to a naked-eye human vision state that changes automatically at predetermined time intervals.