| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve a problem of a conventional power supply indication device which uses an LED (light emission diode) for checking a power supply state in which a case shell requires to have a hole for checking light emission and the LED has to be disposed near an edge of board; and which requires a wider circuit occupied area for wiring to connect to the power, tends to be subjected to an influence of noises such as cross talk with a long wiring on a board which requires a wider occupied area.SOLUTION: The power supply indication device of the invention uses a combination of a laser diode and a light diffusion resin to thereby eliminate a wiring for connecting to an area near a case shell, which is required in a conventional LED on a board. Thus, an area occupied by the circuit can be reduced and influences of noises due to cross talk are reduced.</p> |
