Patent ID: 7342624

Claim:
A dual display liquid crystal display (LCD) device comprising: a front light unit supplying light; a first polarizer on the front light unit; an LCD panel on the first polarizer; only one selective reflection/transmission part on the LCD panel that includes a cholesteric liquid crystal (CLC) film that selectively transmits light having a first circular polarization and reflects light having a second circular polarization, wherein the first and second circular polarizations have opposite directions; and a second polarizer on the selective reflection/transmission part: wherein the selective reflection/transmission part selectively reflects the light in a reflection mode to display an image on a front side thereof in a first display mode; wherein the selective reflection/transmission part passes the light in a transmission mode to display an image on a rear side thereof in a second display mode; wherein the only one selective reflection/transmission part is between the first and second polarizer; wherein the first and second optical axes of the first and second polarizers are substantially perpendicular to each other; and wherein the LCD panel is between the only one selective/transmission part and the front light unit.