| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light source device from which desired light distribution characteristics can be obtained, while facilitating manufacture. <P>SOLUTION: An LED bulb includes a cover, a case 12, a base 13, and an LED module 14. The cover includes a cover upper part 11a and a cover lower part 11b. The cover upper part 11a has a cover upper part transmission part 11c which transmits light emitted from the LED module 14 to the outside, and a cover upper part diffusion and transmission part 11d which reflects the light emitted from the LED module 14 to the inside and diffuses it, and transmits the light to the outside. The cover upper part transmission part 11c is arranged nearly at the center of the cover upper part 11a, and the cover upper part diffusion and transmission part 11d is arranged at the surrounding of the cover upper part transmission part 11c. <P>COPYRIGHT: (C)2012,JPO&INPIT |
