System and method employed in projector for protecting eyes

Details System and method employed in projector for protecting eyes System and method employed in projector for protecting eyes

2011-05-31

2011-05-31

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Projected image combined with real object

C353S030000, C353S025000, C382S203000, C382S292000, C345S156000

Reexamination Certificate

active

07950804

ABSTRACT:
A system employed in a projector for protecting eyes when the projector is in use, includes an initialization module, a light emitting-receiving device, a time-measuring module, a comparison module, and an image-outputting device. The initialization module is configured for initializing a standard time value. The light emitting-receiving device is configured for emitting a light and receiving a reflection of the light. The time-measuring module is configured for measuring time elapsed between emitting the light and receiving the reflection to generate a time-cost value. The comparison module is configured for comparing the standard time value with the time-cost value to generate a signal. The image-outputting device is configured for outputting an eye-protective image or a general image corresponding to the signal.

REFERENCES:
patent: 6286958 (2001-09-01), Koest et al.
patent: 6945653 (2005-09-01), Kobori et al.
patent: 1523439 (2004-08-01), None

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