Projection type video display

Details Projection type video display Projection type video display

2004-07-15

2008-05-13

Sever, Andrew T. (Department: 2851)

Optics: image projectors

Lens support

Lens position adjustable

C353S069000, C348S745000

Reexamination Certificate

active

07370980

ABSTRACT:
At the time of manual adjustment, a motor driving signal corresponding to a user's key operation is fed to a focusing motor from a microcomputer through a switch. At the time of automatic adjustment, the switch selects a motor driving signal from a sensor and feeds the selected motor driving signal to the focusing motor. The sensor contains a dedicated microcomputer. The dedicated microcomputer samples an image pick-up signal of a CCD line sensor in the sensor to generate contrast data, and automatically drives the focusing motor, to automatically make focusing adjustment.

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patent: 6862086 (2005-03-01), Kanemitsu
patent: 7175285 (2007-02-01), Li et al.
patent: 2003/0223048 (2003-12-01), Kimura
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patent: 2005/0024606 (2005-02-01), Li et al.
patent: 2005/0168705 (2005-08-01), Li et al.
patent: 2002-213946 (2002-07-01), None
patent: 2003-57531 (2003-02-01), None
patent: 2003-78842 (2003-03-01), None

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