Illumination – Elongated source light unit or support – With or including transparent or translucent member
Patent
1991-04-26
1993-08-10
Yeung, James C.
Illumination
Elongated source light unit or support
With or including transparent or translucent member
362 11, 362 16, 362260, 362321, 362342, F21S 300
Patent
active
052354970
ABSTRACT:
A luminescent fixture for providing sustained illumination suitable for television, video and film production includes a plurality of parallel mercury vapor luminescent lamp tubes aligned in close proximity in a common plane bisecting an acute concave angle defined by high reflectivity facing surfaces of a pair of longitudinal reflector panels. A plurality of separate electronic ballasts located at the base of the extending reflector panels provide a plurality of unsynchronized electrical current pulse trains each for exciting pulsed ultraviolet light emissions from Hg vapor within a particular set of lamp tubes at a rate sufficient to excite/stimulate sustained luminescent light emission from the phosphors in the emulsion coating lining the interior of the light tubes, i.e., at a rate sufficient to excite/stimulate pulsed fluorescent and phosphorescent light emission of a desired color/chromacity, each pulse having a duration greater than that of the exciting electrical current pulses, such that each luminescent light pulse emitted overlaps emission of the subsequent luminescent light pulse excited/stimulated in each tube. The lack of synchronization in output of the electronic ballasts precludes coherency in the respective electrical current pulse trains and therefore any coherency in the respective luminescent light pulse trains emitted by the respective lamp tubes to minimize intensity ripple in light emanating from the fixture.
REFERENCES:
patent: 2732483 (1956-01-01), Elmer
patent: 2735522 (1956-02-01), Lee
patent: 3220065 (1965-11-01), Graham
patent: 3253082 (1966-05-01), Buset
patent: 3566102 (1971-02-01), Choyke, Jr.
patent: 4562517 (1985-12-01), Pankin
patent: 4682078 (1987-07-01), Pascalide
patent: 4794501 (1988-12-01), Bartenbach
Newhouse David E.
Yeung James C.
LandOfFree
Luminescent fixture providing directed lighting for television, does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Luminescent fixture providing directed lighting for television, , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Luminescent fixture providing directed lighting for television, will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1730348