| 摘要 |
The lighting apparatus using light emitting diode is provided to diffuse the LED light and protect the LED by forming the protective diffusion cover on the front side of LED. In case the brightness(B) outputted from the light sensor(311) is lower than the critical brightness(B_th), the lighting control(321) outputs the LED driving signal (D_LED). In case the temperature(T) outputted from the temperature sensor(312) is higher than the first critical temperature(T_th1), the temperature controller(322) outputs the first cooling fan driving signal(D_FAN1). In case the temperature outputted from the temperature sensor is higher than the second critical temperature(T_th2), the temperature controller outputs the second cooling fan driving signal (D_FAN2). The power supply unit(330) supplies the LED drive power (V_LED) in response to the LED driving signal of the lighting control. The power supply unit supplies the first and the second cooling fan driving power source(V_FAN1,V_FAN2) in response to the first of the temperature controller and the second cooling fan driving signal. |
