| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED bulb with a base which uses an LED as a light emitting source and is easily compatible with such a bulb with a base that is comprised of another light emitting source at nearly less investigation cost, and which is compact and has less unevenness of luminance and no polarity. <P>SOLUTION: An LED mounting substrate wherein a plurality of LEDs 8a-8f are three-dimensionally arranged at high density is joined with a circuit part mounting substrate wherein circuit parts such as a rectifier diode 9, a resistance 10, etc. are mounted, and they are both arranged within a space 6 formed by a housing 4 and a lens 5. The housing 4 is attached to a base part 3 which is used to a halogen lamp or the like, thereby constituting an LED bulb with a base. The lens 5 is arranged to cover the LEDs 8a-8f, and an opening 15 provided above the LEDs 8a-8f is formed of a convex curve that the sectional shape of an inner circumferential surface 16 is open toward the outgoing direction of light to the optical axis X of the LED bulb with a base. <P>COPYRIGHT: (C)2007,JPO&INPIT |
