Patent ID: 8912723

Claim:
A method for driving light adjustments, comprising: for a first time connecting a light source driving circuit which supplies a light source and an MCU with electricity and driving the light source to gradually vary brightness according to a predefined firmware program by the light source driving circuit which is controlled by the MCU; a temporary power supplying circuit continuing to supply the MCU with electricity after the light source driving circuit is disconnected; when the light source is in a state of gradually varying the brightness and at an instant of disconnecting the light source driving circuit, the MCU obtaining an instant brightness state of the light source when the light source driving circuit is disconnected and the MCU temporarily storing information about the brightness state; the temporarily stored information about the brightness state vanishing when the light source driving circuit is disconnected while the light source is gradually varying the brightness and after the temporary power supplying circuit stops supplying the MCU with electricity; again connecting the light source driving circuit after the first time before the information about the brightness state vanishes, driving the light source to work according to the information about the brightness state by the light source driving circuit which is controlled by the MCU and the MCU stably storing up the information about the brightness state; again connecting the light source driving circuit after the first time after the information about the brightness state vanishes and driving the light source to gradually vary the brightness according to the predefined firmware program by the light source driving circuit which is controlled by the MCU; disconnecting the light source driving circuit when the light source is working according to the brightness state which is constant, connecting the light source driving circuit after the light source driving circuit is disconnected and the temporary power supplying circuit stops supplying the MCU with electricity and the MCU saving the stably stored information about the brightness state; connecting the light source driving circuit after the information about the brightness state is eliminated and driving the light source to gradually vary the brightness according to the predefined firmware program by the light source driving circuit which is controlled by the MCU; and connecting the light source driving circuit after the information about the brightness state is saved and driving the light source to work according to the stably stored information about the brightness state by the light source driving circuit which is controlled by the MCU.