Patent ID: 6774963
Filing Date: 2004-08-10
Classification: G02F

Abstract:
A liquid crystal display device for a color display comprising a display panel having a display surface, and is both a transmissive type and a reflective type panel the device comprising:a back side light source; a nonabsorption type color filter corresponding to a display color of each pixel on the display surface; a liquid crystal layer in a cell behind the panel; reflection means for reflecting light entering from the display panel side of the liquid crystal display device and passing through said liquid crystal layer to exhibit a display when the panel functions as a reflective type panel; transmission means for transmitting light entering from a side opposite to the display panel side of said liquid crystal layer to exhibit a display when the panel functions as a transmissive type panel; and voltage signal controlling means for applying a first voltage signal to said liquid crystal layer when the panel functions as a transmissive type panel and applying a second voltage signal smaller than the first voltage signal to said liquid crystal layer when the panel functions as a reflective type panel.