Patent ID: 7329028

Claim:
A uniform light generating system for adjusting output brightness, comprising: a light-generating unit having a light-emitting element for generating light beams and a brightness control element for adjusting a luminous flux of the light beam; a light-transmitting unit having one side communicated with the light-generating unit for receiving the light beam passing through the brightness control element; a hollow spheroid unit having an external casing and a reflective element disposed in the external casing, wherein the hollow spheroid unit is communicated with the other side of the light-transmitting unit for guiding the light beam into the external casing, and the external casing has an output hole for projecting uniform light beams; a light-sensing unit for detecting electric power values in the external casing; and a control unit electrically connected to the light-generating unit and the light-sensing unit; wherein when the brightness control element is adjusted to generate different luminous fluxes of the light beams, a plurality of sets of real illumination values are obtained via a lux meter to detect the uniform light beams projected from the output hole and a plurality of sets of electric power values corresponding to the sets of real illumination values are obtained via the light-sensing unit to detect the light beams in the external casing; wherein when controlling the brightness control element via the control unit to adjust the luminous flux of the light beams and comparing the sets of real illumination values with the corresponding sets of electric power values, a real illumination value projected from the output hole becomes known.