Scanning type image display apparatus having a...

Details Scanning type image display apparatus having a... Scanning type image display apparatus having a...

2006-02-24

2009-08-18

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S205000

Reexamination Certificate

active

07576315

ABSTRACT:
A scanning type image display apparatus includes a synchronization control circuit that enables a scanning unit to synchronize the forward paths and backward paths. The scanning type image display apparatus comprises a light source, scanning unit for scanning the light beam in two dimensional directions, a scanning optical system for forming an image of the light source on a surface to be scanned, the last surface of the scanning optical system including a reflecting area that reflects an effective light beam for forming an image on the surface to be scanned and a light transmission portion provided outside the reflecting area, light beam detection unit for detecting a light beam transmitted through the light transmission portion, and a synchronization control circuit that controls light emitting timing of the light source based on a signal from the light beam detection means.

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Helsel et al, “Wafer Scale Packaging for a MEMS Video Scanner”, Microvision, Inc., SPIE—The International Society for Optical Engineering, MEMS Design, Fabrication, Characterization and Packaging Conference, May 30-Jun. 1, 2001, vol. 4407, pp. 214-220.

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