Patent ID: 7330226
Filing Date: 2008-02-12
Classification: G02F

Abstract:
1. A reflection-type liquid crystal display (LCD) device, comprising: lower and upper substrates facing each other; a first color filter layer having first photonic crystal balls on the lower substrate for reflecting a first one of the specific wavelengths corresponding to a red color of light, wherein the first photonic crystal balls are formed of nano-particles having diameters corresponding to one-half of the specific wavelength corresponding to the red color light; a second color filter layer having second photonic crystal balls on the lower substrate for reflecting a second one of the specific wavelengths corresponding to a green color of light, wherein the second photonic crystal balls are formed of nano-particles having diameters corresponding to one-half of the specific wavelength corresponding to the green color of light; a third color filter layer having third photonic crystal balls on the lower substrate for reflecting a third one of the specific wavelengths corresponding to a blue color of light, wherein the third photonic crystal balls are formed of nano-particles having diameters corresponding to one-half of the specific wavelength corresponding to the blue color of light; gate and data lines on one of the lower and upper substrates crossing each other to define a pixel region; a thin film transistor at a crossing point of the gate and data lines; a pixel electrode within the pixel region electrically connected to the thin film transistor; and a liquid crystal layer between the lower and upper substrates, wherein the color filter layers including the plurality of photonic crystal balls only reflect incident light.