Patent ID: 6088076
Filing Date: 2000-07-11
Classification: G02F

Abstract:
A color liquid crystal display apparatus comprising:a light source for generating light including a plurality of color lights of different wavelengths;a holographic optical element for splitting the light generated by said light source into a plurality of color lights of different wavelengths to be transmitted; anda liquid crystal cell having a plurality of pixels to which any one of the plurality of color lights split by said holographic optical element may be made incident,wherein:said holographic optical element comprises unit holographic optical elements arranged in a periodic spatial relationship,each of said unit holographic optical elements comprises a set of three kinds of holographic optical cells which transmit mainly a red wavelength light, a green wavelength light and a blue wavelength light, respectively, toward associated pixels of said liquid crystal cell which are diffracted at different diffraction angles, andmajor rays of the red, green and blue wavelength lights hit center portions of associated pixels of said liquid crystal cell in a direction normal to the liquid crystal cell.