Active-matrix display with power supply voltages controlled depending on the temperature

In a liquid crystal or OLED active-matrix screen, the power supply voltages VGON and VGOFF of the display control circuit driving the control transistors of the pixels are optimized, as a function of a measurement of the operating temperature, to conserve the display qualities of the screen at high and low temperatures and reduce the power consumed on average to produce screens for applications in a severe environment, with transistors of standard size. Circuits are provided for supplying these analog voltages from numeric values supplied by a code associated with the temperature measurement, stored or computed by a programmable circuit. Provision is made to adapt these voltages as a function of a measurement of lighting level received by the transistors of the display control circuit. The optimization extends to the power supply and reference voltages necessary to the control of the pixels, notably to the gamma reference voltages.