| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED bulb enabling greatly adjusting light distribution while suppressing a decrease in emission efficiency and an increase in the number of parts.SOLUTION: Integrally molded cylindrical parts 22 and 23 are fixed so as to hang down in the inside of a globe 1 included in an LED bulb 10. The cylindrical parts 22 and 23 are a double cylinder and may have a lateral face as an inclined plane. Many elements in light emitted from an LED 25 are made incident to the cylindrical parts 22 and 23 at first. The light is emitted from the cylindrical parts 22 and 23 while being scattered just after being refracted by the cylindrical parts 22 and 23, and penetrates into the globe 1 thereafter. Consequently, the light emitted to a direction of a cap 4 is increased. |
