A method for driving a light emitting diode coupled to an output of a current mirror is provided. A conveying unit is configured to convey the developer stored in the storing section to the supplying roller. The finger indentations may be located on either side, depending on whether the particular embodiment is intended for right or left-handed users. The server receives reception information from the cooking appliance and is connected with the cooking appliance to send transmission information processed with reference to the reception information to the cooking appliance. In typical operations, the gap between the rear rolls is set to be considerably smaller than the gap between the front rolls. An identifier of a cell is set in the broadcasting signal and, if the cell is changed, channel information of the changed cell can be obtained from program table information having the channel information of the cell.