| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate a decrease in quality due to color uneveness caused by a white light emitting diode and to securely insulate a conductive part and a case by making the case thin. <P>SOLUTION: An indication lamp contains a printed board 20 in the case 10 and a translucent plate 30 is arranged at a distance from the printed board 20. The printed board 20 has a plurality of light emitting diodes 40 fixed on its top surface side at given intervals and is provided with a conductive pattern 22P only on the top surface side and no conductive pattern on the back surface, and further provided with a diffused reflection layer 21 which reflects light so that the light is scattered at the top surface side. The translucent plate 30 has a transmission and diffused reflection layer 31 which transmits part of light and reflects the rest. The indication lamp reflects the light emitted by the light emitting diodes 40 in a scattered state by the transmission and diffused reflection layer 31 of the translucent plate 30 and the diffused reflection layer 21 of the printed board 20 and emits the light to the outside from the translucent plate 30. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
