An image processing apparatus includes at least two signal processor modules interconnected each other in series. When a word line rises to H level, third and fourth N-channel MOS transistors for accessing are rendered conductive, to pass current from dummy bit line to a line of ground potential via the third N-channel MOS transistor, the first N-channel MOS transistor, and a fifth N-channel MOS transistor for driving. 5 of melting temperature of a metal plate with the smallest yield value, during a second stage the package is heated by a high frequency which heats the damping lining up to 0. Each of the LED chips includes a first electrode and a second electrode. A read operation biases the word line higher that the threshold voltage used to store data and compares the resulting channel to reference currents to identify a stored binary, analog, or multi-bit value.