| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problems that it is difficult to achieve higher output due to poor temperature characteristics in a conventional infrared light emitting element, and also it is difficult to use for a sensor since glare due to visible light is caused, even if a visible-infrared phosphor is excited with visible light to obtain infrared light. <P>SOLUTION: In a light emitting device with a combination of a light emitting diode element emitting ultraviolet light and/or visible light and a phosphor excited with the light emission and emitting at least infrared light, only infrared light is extracted using a filter for preventing ultraviolet light and visible light from passing through, and the filter is also allowed to have a function dissipating heat produced from the phosphor toward an outside to reduce temperature extinction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
