| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for suppressing a rise in manufacturing cost by suppressing an increase in the number of components, and suppressing the number of wires and wire lengths, improving reliability, eliminating unnecessary radiation or reducing radiation noise and so on. <P>SOLUTION: A lighting device 110 of the present invention includes a light emitting element 111, a light guide body 112 which guides light emitted by the light emitting element 111 to project illumination light, a light emission control circuit 110X which performs modulation control while making the light emission type of the light emitting device 111 correspond to an input signal X1, a photodetector 116 which detects the light emitted by the light emitting element 111 and outputs a detection signal, and a receiving circuit 110Y which outputs an output signal X4 corresponding to the input signal X1 based upon the detection signal Y1 of the photodetector 116. <P>COPYRIGHT: (C)2007,JPO&INPIT |
