Ceiling fan with rotary blade surface light
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United States of America Patent
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-
Jan 24, 2012
Grant Date -
Sep 4, 2008
app pub date -
Jan 23, 2008
filing date -
Feb 7, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a ceiling fan having a blade surface light, an annular blade surface light including a plurality of LEDs that are light emitters that are continuously placed is secured on a circumference that connects sides near tips of a plurality of rotary blades of the ceiling fan, and the light emitters are lit by a lighting controller only when they are in a predetermined range on a rotation reference circumference. LED devices housing the LEDs that are the light emitters and that are provided with cooling fins are housed in an annular LED case, and the LED case is secured to the rotary blades. Thus, the LEDs radiate heat from the cooling fins provided in the LED devices by rotation of the rotary blades, and they are intermittently lit and extinguished to prevent a temperature increase. The LEDs only in the predetermined range are lit, thereby preventing any uncomfortable feeling when LEDs are caused to flash.
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