OPTICAL MOVEMENT DETECTION DEVICE
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United States of America Patent
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Issued Date -
Dec 3, 2009
app pub date -
May 13, 2009
filing date -
May 29, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to an optical movement detection device including a light source (10) for irradiating a surface (12), a power supply (14) and an optical sensor (16) for sensing light reflected from the surface (12). In order to avoid unused optical energy, it is proposed that the optical movement detection device further comprises at least one solar-cell photodiode (30a-30d), wherein the solar-cell photodiode (30a-30d) is arranged so as to recycle optical energy generated by the light source (10).
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