Image projection apparatus

Details Image projection apparatus Image projection apparatus

2007-05-29

2007-05-29

Koval, Melissa Jan (Department: 2851)

Optics: image projectors

Lamp control

C353S101000, C348S745000, C352S140000

Reexamination Certificate

active

11532339

ABSTRACT:
An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

REFERENCES:
patent: 6846081 (2005-01-01), Mochizuki et al.
patent: 6962416 (2005-11-01), Ohara
patent: 6974217 (2005-12-01), Kimura et al.
patent: 7108375 (2006-09-01), Eguchi
patent: 4-338707 (1992-11-01), None
patent: 11-109214 (1999-04-01), None
patent: 2000-295443 (2000-10-01), None
patent: 3120526 (2000-10-01), None

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