REFLECTION TYPE LIQUID CRYSTAL DISPLAY DEVICE WITH FRONT LIGHT

摘要

PROBLEM TO BE SOLVED: To prevent the increase of the power consumption of a light source in the case of improving the contrast and luminance of a front light by making the emitted light of an organic electroluminescence light source incident from the end face of a planar light transmission plate, reflecting it in the thickness direction of the light transmission plate and illuminating a reflection type liquid crystal panel. SOLUTION: The organic electroluminescence light source 2 composed by forming an organic electroluminescence material 8 between a linear transparent electrode 7 patterned by a line width narrower than the thickness of the light transmission plate 1 and a mirror reflectable metallic electrode 9 thicker than the line width of the transparent electrode 7 is arranged. Then, the light emitted from the light source 2 is made incident from the end face of the light transmission plate 1 and reflected in the thickness direction of the light transmission plate 1 and the reflection type liquid crystal panel is illuminated. In this case, since the width of the transparent electrode 7 is thinner than the thickness of the light transmission plate 1, the light emission of the organic electroluminescence material 8 becomes a linear light source and the light with excellent directivity is made incident. Also, the metallic electrode 9 functions as a reflector and prevents the emitted light from leaking.