A Ni film is deposited over the entire surface of a substrate including a silicon gate. A first embodiment includes a T-adapter, an air solenoid, a fuel injector, and a control unit. During this autodiscovery process, the optical identification signal from the first optical module may be attenuated or shifted in optical spectrum so as not to interfere with the operation of the second optical module. A phosphor layer is formed in each of the discharge cells. The second switching unit transmits outputs of output drivers to all channels of the TFT-LCD source driver in response to the internal load signal.