Image display device having a laser beam diameter converting...

Details Image display device having a laser beam diameter converting... Image display device having a laser beam diameter converting...

2011-06-21

2011-06-21

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S208100

Reexamination Certificate

active

07964841

ABSTRACT:
The present image display device is an image display device that scans laser beams emitted from light sources101, 102and103to form an image on a projection surface, and includes laser beam diameter-converting optical systems104that shape a beam waist of a laser beam, and horizontal scanner106and vertical scanner107for scanning a laser beam. Beam diameter-converting optical systems104adjust the beam diameter at the position of mirror26, which is a beam deflector for scanner106and107, to be smaller than the mirror diameter. Also, beam diameter-converting optical systems104shape beam waist110so that a full width at half maximum of the intensity, which corresponds to beam diameter114or116, is always smaller than pixel pitch115or117in projection range118defined between first projection surface112and second projection surface113.

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Chinese Patent Office issued a Chinese Office Action dated Mar. 29, 2010, Application No. 200780040218.8.
David W. Wine et al., “Performance of a Biaxial MEMS-Based Scanner for Microdisplay Applications”, Proc. of SPIE vol. 4178, MOEMS and Minaturized Systems, ed. M. Motamedi, R. Goering (Sep. 2000), pp. 186-196.

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