TEMPERATURE CONTROLLER IN PRINTER

PURPOSE:To absorb a temperature characteristics of a recording paper for gradation to obtain a stable gradation, by controlling a gradation by a method wherein a control start pulse is imparted to a first pulse generating means, a control end pulse is imparted to a second pulse generating mans, and an optimum applying time width pulse is imparted m the second pulse generating means to a thermal head. CONSTITUTION:When a computer sends an 'ON' signal of control pulse to a terminal T1, an integrated circuit 1 rises at t0. With a thermal head of low temperature, a temperature control pulse of pulse width tau2 is imparted from a Q output to an A input in an integrated circuit 4. When the temperature is high in the vicinity of the thermal head, a temperature control pulse of pulse width tau3 is applied from the Q output to the A input in the integrated circuit 4. The pulse width tau3 at this time is tau2