Projection display apparatus

Details Projection display apparatus Projection display apparatus

G - Physics

02

B

G02B 27/00 (2006.01) G02B 27/18 (2006.01) H04N 5/74 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2149470

A projection display apparatus includes a light source, a light valve, and a projection lens. The light source includes at least two luminous elements, a plural- ity of light condensing devices provided in the same number as the luminous elements, and a light transmitting device for transmitting the light beams outgoing from the respective light condensing devices to the light valve in a superimposed state. The light transmitting optical device forms actual images of the plurality of luminous elements on an optical path thereof so that the actual images are substantially inscribed in a circle on the same, single plane. The projection display apparatus further includes a device for lighting up at least one of the plurality of luminous elements selectively so as to change the brightness of the image displayed by projec- tion by steps.

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