| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED bulb having sufficient heat radiation effects on heat generation during lighting on the LED bulb as a light-emitting source, while achieving light distribution characteristics similar to those of conventional incandescent bulbs.SOLUTION: A flare stem 2 constructed in such a manner that a planar glass body 41 having an electrode pattern 43 formed thereon and an LED element 50 mounted on the electrode pattern 43 is welded to a glass flare 10 and the welded part passes through a pair of lead wires 20, 21, is inserted into a glass bulb 60 filled with inactive gas in an airtight manner. The pair of lead wires 20, 21 are joined at their one-end sides to lead wire joint pads 44, 45 constituting the electrode pattern 43 formed on the planar glass body 41, and delivered at their other-end sides to outside of the glass bulb 60, respectively. |
