Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1999-03-26
2000-01-25
Schuberg, Darren E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359202, 359204, 347235, 347243, 348744, 348756, 250234, 250236, G02B 2608
Patent
active
060184086
ABSTRACT:
A laser projection display apparatus including an optical separating device for separating a white light beam emitted from a first optical source into red, green, and blue monochromic light beams, an image signal processing unit for separating a received composite image signal into an image signal and horizontal and vertical synchronous signals, an optical modulator for modulating the monochromic beams according to the image signal output by the image signal processing unit, a galvanometer and a rotating polygonal mirror for vertically and horizontally projecting the modulated beams, respectively, on a screen, a second optical source for radiating light on the reflection planes of the rotating polygonal mirror, and an optical detector for detecting light emitted from the second optical source and reflected by the reflection planes of the rotating polygonal mirror, and transmitting the detection signal to the image signal processing unit, when a starting point of horizontal projection by the rotating polygonal mirror is made on a predetermined vertical line on the screen, wherein the image signal processing unit synchronizes the image signal with the detection signal of the optical detector and outputs the synchronized image signal to the optical modulator.
REFERENCES:
patent: 5210635 (1993-05-01), Nagata et al.
patent: 5608563 (1997-03-01), Matsumura et al.
Samsung Electronics Co,. Ltd.
Schuberg Darren E.
LandOfFree
Laser projection display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser projection display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser projection display apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2319718