Patent ID: 7411635

Claim:
A liquid crystal display (LCD) device, comprising: a liquid crystal display (LCD) screen panel for producing images; and a projection-based backlight system comprising a light source for supplying a light beam; polarizing means for polarizing the light beam supplied by the light source to obtain a polarized light beam; and a first projection lens for enlarging the polarized light beam received from the polarizing means and projecting the enlarged polarized light beam onto the LCD screen panel; wherein the polarizing means comprises: a polarizing beam splitter having a light input side for receiving the light beam, a first split-light side adjacent to the light input side, a second split-light side opposite to the light input side, and a light output side opposite to the first split-light side, the polarizing beam splitter being configured to split the light beam into first polarization light to pass directly through the second split-light side for the first projection lens and second polarization light to be directed toward the first split-light side.