Patent ID: 7160104

Claim:
A lighter unit provided in portable electronic equipment having at least a key operation unit and a display unit, being included in a housing of said portable electronic equipment, which comprises: a fuel tank built in said housing, an ignition unit, a switch which controls the flow of fuel gas from said fuel tank to a burner portion provided at an end of said housing and operates said ignition unit to light a flame, a pressure detector which is set within said fuel tank in order to measure the amount of fuel, an internal state controller which controls said pressure detector, converts pressure data into fuel amount data, and stores the fuel amount data as latest fuel amount data, a controller which controls messages of pressure measurement request and pressure measurement reply between said internal state controller and said pressure detector, and a display controller which converts the latest fuel amount sent from said controller into predetermined data for display indicating the fuel amount, wherein said data for display is displayed on a screen of said display unit of said portable electronic equipment according to said display controller.