Projection type display device, control method, display panel, video display device, view finder, control method for projection type display device and video camera

TL;DR: In this paper, the light emitted from discharge lamps 125a and 125b are condensed by elliptic mirrors 11a and 11b and combined on the surface of a prism 14 so as to become one optical path, then, a liquid crystal display panel is illuminated.

Abstract: PROBLEM TO BE SOLVED: To provide an illuminating device capable of efficiently condensing light emitted from respective lamps and forming illuminating light of high uniformity, even in the case of using plural lamps, and also, to provide a projection type display device capable of displaying a bright projected image of high quality by using the illuminating device. SOLUTION: The light emitted from discharge lamps 125a and 125b are condensed by elliptic mirrors 11a and 11b. The condensed light is focused and combined on the surface of a prism 14 so as to become one optical path, then, a liquid crystal display panel is illuminated. A shutter 141 for controlling so that the light of the optical path 143 may be transmitted or shielded is arranged near the prism 14. The intensity of the light for illuminating the liquid crystal display panel is switched by operating the shutter 141. Thus, a screen luminance is easily changed.