Patent ID: 7299016

Claim:
A communication device with an adjustable brightness, comprising: a control circuit, for producing a light emitting signal according to using status of said communication device; a power supply circuit, electrically coupled to said control circuit for supplying a power required by the normal operation of said control circuit; a modulating unit for producing a first set value, electrically coupled to said control circuit for receiving said light emitting signal, and being coupled to said power supply circuit for receiving a power supply produced by said power supply circuit, producing a corresponding operating voltage according to said light emitting signal, and changing the magnitude of said operating voltage according to said first set value; a light emitting unit, electrically coupled to said modulating unit for receiving an operating voltage produced by said modulating unit and producing a light source of a different brightness according to the magnitude of said operating voltage; an input circuit, electrically coupled to said control circuit and including a plurality of press buttons for producing an input signal and sending said input signal to said control circuit for analyzing and decoding said input signal into a corresponding text, number, or function; and a display circuit, electrically coupled to said control circuit and including a display device for displaying a corresponding text, number, or graphic data on said display device according to a display signal produced by said control circuit.