| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase light intensity by arranging as many LEDs as possible in a limited surface area because light intensity of an LED bulb is smaller than that of an incandescent lamp. <P>SOLUTION: This arrangement structure of LEDs in an LED bulb includes a plurality of LEDs and a board having through holes each having a dimension at least equivalent to the outline of the LED, and is characterized by that the LEDs comprise first LEDs fixed on the board and second LEDs housed in the through holes and fixed at positions without projecting top surface positions thereof from the surface of the board. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
