| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism that allows a control unit of a compact light emission device to be hardly affected by noise from a light emission unit thereof.SOLUTION: A strobe device comprises: a light emission unit 4 that emits strobe light; and a main substrate 31 that is disposed in a direction intersecting with an illumination surface of the light emission unit 4 on a rear side of the light emission unit 4 and has a control CPU 32 and a light reception sensor IC 33 mounted. The main substrate 31 is composed of a multilayer substrate of four layers or more, and a ground layer of the multilayer substrate and a power supply layer thereof are a mutually different layer. The ground layer includes an analog ground pattern 31e, a digital ground pattern 31f and a power supply ground pattern 31d. The digital ground pattern 31f is wired in inner layers beneath the control CPU 32, and the analog ground pattern 31e is wired in the inner layers beneath the light reception sensor IC 33. The power supply ground pattern 31d is wired in the inner layers beneath an electric component part of a power supply system at a position apart from the control CPU 32 and the light reception sensor IC 33. |
