Patent ID: 8866995

Claim:
An LCD (liquid crystal display) device comprising: a backlight unit for supplying light to a liquid crystal panel including lower and upper substrates; a first polarizing plate formed between the lower substrate and the backlight unit; a second polarizing plate formed on the upper substrate; a passivation substrate for protecting the lower and upper substrates; a one-color film for selectively reflecting light with a predetermined wavelength during a non-driving mode of the backlight unit; an air gap formed between the one-color film and the second polarizing plate or between the one-color film and the passivation substrate; and an external case for covering the liquid crystal panel; wherein the one-color film comprises an adhesive layer, a cholesteric liquid crystal layer and a single quarter wave plate, wherein the quarter wave plate is only formed under the cholesteric liquid crystal layer and the quarter wave plate is not formed over the cholesteric liquid crystal layer and the adhesive layer is interposed between the cholesteric liquid crystal layer and the quarter wave plate, wherein the one-color film selectively reflects light having the same color as that of the external case.