LIGHT EMITTING DEVICE AND DENTAL HANDPIECE DEVICE
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United States of America Patent
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Issued Date -
Jun 23, 2011
app pub date -
Dec 22, 2010
filing date -
Dec 23, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A light emitting device is provided in a dental handpiece device for illuminating an area in the vicinity of a dental care tool at a tip of the dental handpiece device. The light emitting device includes a light emitting section including a light emitting diode element and an electrode, and an electric power control section for controlling electric power to be supplied to the light emitting diode element via the electrode. The electric power control section includes an electric current restriction element for restricting an amount of electric current to be supplied to the light emitting diode element, and a reverse voltage prevention element for preventing a reverse voltage from being applied to the light emitting diode element.
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