| 摘要 |
PROBLEM TO BE SOLVED: To project a bright picture by increasing the quantity of light which can be utilized by a projection lens in a projection type display device using an organic EL element as a light source. SOLUTION: A red EL light source 30R, a green EL light source 30G and a blue EL light source 30B respectively radiating a red light beam, a green light beam and a blue light beam are arranged at the back surfaces of respective liquid crystal display elements 31R, 31G and 31B displaying one color component of the primary colors. The respective light sources are constituted by arraying organic EL elements 301R, 301G and 301B and arraying lenses 302R, 302G and 302B formed corresponding to the respective organic EL elements. The organic EL elements are arranged at positions being more distant from the lenses with respect to the focal points of the lenses. The divergence of the light beams radiated from the organic EL elements is suppressed so as to illuminate the liquid crystal elements thereafter. The pictures displayed at the liquid crystal display elements are synthesized by a dichroic prism 32 and projected on a screen 34 by being enlarged by a projection lens 33.
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