| 摘要 |
The present invention relates to a lamp brightness control circuit which can minimize the required circuit size and component cost when controlling two LED lamps to have different brightness. The lamp brightness control circuit includes: a driving unit which includes a switch, an energy storage unit and a control unit; and a lamp unit which is coupled to the energy storage unit and includes a first lamp and a second lamp. The energy storage unit receives energy from a power supply unit by using opening and closing operations of the switch. The control unit is configured to control the opening and closing operations of the switch in response to a control signal to transmit the energy supplied from the power supply unit to the energy storage unit to save the energy in the energy storage unit and transmit the stored energy to the first and second lamps. |
