Projector device with theft prevention function and theft...

Details Projector device with theft prevention function and theft... Projector device with theft prevention function and theft...

2006-01-24

2008-09-30

Bugg, George A (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S539130, C340S568100, C340S686100, C340S686600

Reexamination Certificate

active

07429930

ABSTRACT:
X-direction double integrator3integrates twice an acceleration that is detected by x-direction acceleration sensor1, estimating a traveled distance in an x direction. Y-direction double integrator4integrates twice an acceleration that is detected by y-direction acceleration sensor2, estimating a traveled distance in a y direction. Detection boundary storage unit5stores a monitoring area. Detection boundary comparator6determines whether the projector device is positioned outside of the monitoring area or not based on the traveled distance in the x direction which is estimated by x-direction double integrator3, the traveled distance in the y direction which is estimated by y-direction double integrator4, and the monitoring area stored in detection boundary storage unit5.

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