Patent ID: 7499111
Filing Date: 2009-03-03
Classification: H04N

Abstract:
1. A projection type display device comprising: a white light source and a spectral unit for making spectral diffraction of a visible light flux radiated from the white light source into three primary colors of red, green and blue; a red display element, a green display element, and a blue display element configured to modulate light strength of the spectrally diffracted light flux per picture element according to an input image signal; a light synthesizing unit for synthesizing the modulated light fluxes of respective colors from the red, green and blue display elements; a projection lens for expanding and projecting the light synthesized by the light synthesizing unit on a screen; a first reflector, arranged between at least either of the red display element or the green display element and the white light source, for selectively reflecting a light flux component of a predetermined wavelength region by combining with the spectral unit; a second reflector, arranged between the green display element and the white light source, for reflecting a predetermined amount of green light component, wherein the second reflector has a reflectance of 35% or more near a wavelength of 545 nm; and a single optical phase difference compensator, the single optical phase difference compensator disposed between the green display element and the second reflector.