Patent ID: 9632371
Date: 2017-04-25
CPC Classifications: G02B,G02F

Claim:
1. A display panel, comprising: a cholesteric liquid crystal cell in which cholesteric liquid crystal exhibiting a planar texture state distribution is filled; a first light modulator provided at a light output side of the cholesteric liquid crystal cell, configured to generate a phase retardation in a polarized light passing therethrough so as to modulate polarization o the polarized light, and comprising a liquid crystal layer and a drive electrode for driving liquid crystal molecules in the liquid crystal layer to deflect is as to regulate an amount of the phase retardation of the polarized light passing through the liquid crystal layer; and a first linear polarizer provided at a side of the first light modulator opposite from the cholesteric liquid crystal cell and configured to selectively permit the polarized light modulated by the first light modulator to pass therethrough, wherein the display panel further comprising: a second light modulator and a second linear polarizer, successively disposed at a light input side of the cholesteric liquid crystal cell, and configured to convert a light irradiated toward the cholesteric liquid crystal cell into a circularly polarized light; wherein a transmission axis of the second linear polarizer is arranged to be perpendicular to a transmission axis of the first linear polarizer; wherein the second light modulator is configured to be an in-plane switching liquid crystal cell comprising an upper substrate and a lower substrate assembled together; wherein a nematic liquid crystal layer is filled between the upper substrate and the lower substrate of the second light modulator; and wherein two strip in-plane switching electrodes are disposed to oppose to each other between the upper substrate and the lower substrate of the second light modulator, so as to drive the liquid crystal molecules of the nematic liquid crystal layer to deflect in a plane parallel to the upper substrate of the second light modulator.