Patent ID: 7391568
Filing Date: 2008-06-24
Classification: C03C,G02B,G02F,G03B,H04N

Abstract:
1. A liquid crystal display apparatus comprising: a liquid crystal display element having a liquid crystal layer between a couple of substrates, the liquid crystal display element including optical switch elements for modulating light; a backlight apparatus arranged at one side of said couple of substrates of said liquid crystal display element; a polarizer including a polarized light state converting means for converting polarized states of the light modulated by said optical switch elements, where the polarizer is arranged between said liquid crystal display element and said backlight apparatus; a luminous intensity distribution control element arranged at the other side of said couple of substrates of said liquid crystal display element; an analyzer arranged between said liquid crystal display element and said luminous intensity distribution control element; an observer sensing unit for sensing the presence or absence of an observer; an observer position determining means for determining positions of the observer in the horizontal and vertical directions by sensed signal of said observer sensing unit, and a control signal outputting means for outputting a control signal to said polarized light state converting means based on position information determined by said observer position determining means, wherein said luminous intensity distribution control element comprises a transparent base member, a plural lenses arranged on said transparent base member, and a light absorbing layer having small opening portions substantially at focal positions of an individual lens of said plural lenses, and said transparent base member is constituted of a transparent body substantially optically isotropic or a transparent body having uniaxial optical anisotropy.