| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED light bulb capable of presenting a filament image by achieving a sparkling feeling by strong light diffusion.SOLUTION: In an LED light bulb 1 which is configured by accommodating an LED 3, a substrate 4 mounting the LED 3, and a part of metal terminals 5, 6 in which one end is electrically connected to the substrate 4, in a sealed space in a bulb having constant wall thickness t in which one end of a cylindrical body part 2A is sealed by a hollow hemispherical planar dome part 2B, and by drawing the other end of the metal terminals 5, 6 out of the bulb 2 by penetrating the other sealed part of the bulb 2. When an inner diameter of the dome part 2B of the bulb 2 is defined as r, and the wall thickness is defined as t, a light emitting point position on an optical axis of the LED 3 is set to be (1.6r+t) from an apex of the dome part 2B.SELECTED DRAWING: Figure 1 |
