Large screen projection device

Details Large screen projection device Large screen projection device

G - Physics

03

B

G03B 21/20 (2006.01)

Patent

CA 2366912

A device for large screen projection with a projection lamp (1), an image projection plane (3) and an objective lens (5), the projection lamp (1) directing a cone (7) of light through the image projection plane (3) and through the objective lens (5) and a projection lamp. To greatly increase the light output of such a device and such a projection lamp, it is provided that the projection lamp (1) contains two light sources (2, 4) which are arranged relative to one another such that the envelopes (6, 8) of the two partial cones (10, 12) of light which are produced by the light sources (2, 4) and which feed a main cone of light (7) have at least one common envelope line (14).

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