A light emitting apparatus includes a clock generating circuit and a light-emitting module. The clock generating circuit is for generating a clock control signal. The light emitting module includes a current supplying unit and a light emitting unit. The current supplying unit is for controlling a driving current flowing through a path, and includes a driving current source and a switch unit, which are both positioned in the path. The driving current source is for providing the driving current. The switch unit is coupled to the driving current source and the clock generating circuit, and refers to the clock control signal to open or short for controlling whether the driving current flows through the path. The light emitting unit is positioned in the path and coupled to the current supplying unit, and is for providing a light source according to the driving current.