PURPOSE: To enhance energy efficiency and to make a device compact by constituting the device of a spatial light modulation element, a polarization/ analyzation means and an amplitude dividing beam splitter for dividing an amplitude of write light.
CONSTITUTION: An optical write type display device writes the write light having image information on the light receiving surface of the write light of the spatial light modulation element (SLM) 5 by the amplitude dividing beam splitter(BS) 6 arranged on the write light side as left/right inverted images with the same intensity and the same size. Then, the light from a light source for read-out is polarization separated into a P polarized light and an S polarized light by the polarizing beam splitter(PBS) 4 for both polarization type polarizer/ analyzer provided on a read-out light side, and the areas of the corresponding SLM 5 are irradiated by the P polarized light and the S polarized light, and by synthesis and analyzation of two reflected modulation light and an inversion action of left/right images, the read-out light source light is substantially utilized by nearly 100%. Thus, the display luminance of the device is improved, and the device is made compact, and energy is saved.
YOSHINO KUNIHIKO
INOUE SHINGO
KATANO KATSUHIKO
