| 摘要 |
<p>PURPOSE: A projecting system for a reflective liquid crystal display device and a method thereof are provided to improve the luminance of the entire system by a reset state for black screen display before the screen display of a reflective LCD which is driven in the white mode in the normal state. CONSTITUTION: In a projecting method for a reflective liquid crystal display device, the steps of selectively transmitting light in a stabilized and polarized state proper for a wavelength band and a wavelength direction required for color image display from white light emitted from a light source by an illumination unit(S1). The selectively transmitted light is converted into red, green and blue light in sequence by a color splitter(S2). The converted light is incident to a polarization beam splitter to be split to an s-polarized beam and a p-polarized beam(S3). Liquid crystal is driven per pixel by the beams polarized by the polarization beam splitter(S4). A projection lens unit expands and transmits the image realized by the reflective LCD to a screen(S5). After the screen display, the reflective LCD is in a black state until next screen display by modulated application of a reset voltage to common electrodes, wherein the reset voltage displays black(S6).</p> |
