LCD image projection device

Abstract

Abstract PURPOSE:To enable a user to satisfactorily see a picture even in a bright room by attaching a screen having the periphery shielded from light onto the same optical axis as a projector in the front of the projector. CONSTITUTION:In a cylindrical projector 18, a light source part provided with a concave reflection plate 12 and a condenser lens 13, which converts the light of a lamp 11 to parallel rays, on both sides of the lamp 11 is provided, and the light of this light source part is transmitted through a liquid crystal picture display device 14, and a focusing part 17 is so provided that this light is condensed by a projection lens 15 and is thrown and focused on a screen 16 formed as an independent body. A screen box 21 consisting of a peripheral light shielding part 19 and a screen 20 is detachably attached on the same optical axis as the projector 18. Thus, the picture is satisfactorily seen without an influence of external light even in a bright room when the screen box is attached to the liquid crystal picture projector.

Inventors

• 👤 Tsugio Akita
• 👤 秋田　次雄
• 👤 Takako Takeda
• 👤 武田　貴子
• 👤 Yusuke Morita
• 👤 祐輔 森田

Bibliographic Details