| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED bulb that can expand an irradiation range and an expanding method of the irradiation range of the LED bulb. <P>SOLUTION: The LED bulb 2 includes a base 20 having an opening 201, an LED module 21 which is installed on the opening 201 of the base 20 and of which at least one LED chip 211 is surface-mounted on a circuit board 212, and a globe 22 which is embedded on the LED module 21 and emits radiation light from the LED chips 211 to the outside. A semi-transmission reflection layer 221 which has photo-characteristics to transmit part of radiation light from the LED chips 211 and reflect part of the radiation light is installed on an inner wall of the globe 22. <P>COPYRIGHT: (C)2013,JPO&INPIT |
