a voltage controlled oscillator vco for generating a frequency output corresponding to the input voltage as a function of a temperature measurement by the temperature sensing diode in a preferred embodiment the display system further includes a resistor digital to analog converter rdac for digitally controlling a voltage inputted to the vco in place of the temperature sensing diode in a preferred embodiment the temperature sensing circuit is disposed on a backplane of the display system in a preferred embodiment this invention discloses a display system that includes a temperature sensing circuit disposed on a backplane wherein the temperature sensing circuit includes at leas two diodes for measuring a same local temperature on the backplane in essence this invention discloses a display system that includes a temperature sensing means that includes a means for generating an output frequency corresponding to a temperature measurement in a preferred embodiment the temperature sensing means further includes voltage controlled oscillator vco for generating the output frequency in a preferred embodiment the temperature sensing means further includes a diode for passing a current for providing an input voltage to the vco for generating the output frequency corresponding the temperature measurement in a preferred embodiment the temperature sensing circuit further includes at least two diodes of different sizes in a preferred embodiment the temperature sensing means further includes at least two current sources for providing two different currents in a preferred.