Patent ID: 6507379
Filing Date: 2003-01-14
Classification: G02F,H01L,H04N,H05B

Abstract:
A liquid-crystal projection device having a liquid crystal display element, comprising:a liquid crystal panel having a polarization plate; an organic electroluminescent element having an organic thin-film layer containing organic molecules that emit a light disposed between a reflecting electrode layer that reflects the light and a transparent electrode layer that transmits the light, wherein a half-mirror layer is provided on an optical output side of the transparent electrode layer, the half-mirror layer reflecting a first portion of the emitted light back through the transparent electrode layer into the reflecting electrode layer, while transmitting a second portion of the emitted light, a distance between the half-mirror layer and the reflecting electrode layer being set to an optical distance that produces a resonance of the emitted light; a transparent liquid crystal panel that controls transmission of light emitted from) a face of the organic electroluminescent element; and a polarization conversion element disposed between the organic electroluminescent element and the transparent liquid crystal panel, the polarization conversion element converting a polarization of emitted light from the organic electroluminescent element, and the transparent liquid crystal panel including a polarizing plate that transmits light of a specified polarization, of the light emitted after passing through the polarization conversion element, a direction of polarization of light, provided through the polarization conversion element to the liquid crystal panel, being substantially consistent with a permeable direction of polarization of light in the polarizing plate of the liquid crystal panel.