Digital-to-analogue converters with multiple step movement

A method of converting a parallel digital input signal to a corresponding analogue output voltage, the method comprising the steps of:

• receiving said digital input signal;
• and
• moving said output voltage from a reference value to a first value and then subsequently back to said reference value,
• wherein the magnitude of said first value corresponds with the value of the said digital input signal,
• said output voltage is moved from said reference value to said first value a plurality of voltage steps between said reference value and the magnitude of said first value, and
• said output voltage is moved from said first value back to said reference value in a plurality of voltage steps between the magnitude of said first value and said reference value.

An active matrix liquid crystal display comprising:

• a plurality of picture elements (pixels) each provided with a pixel electrode connected to a data line via a pixel switch, and
• wherein each said data line is connected to the output of a digital-to-analogue converter for converting a parallel digital input signal to a corresponding analogue output voltage, each digital-to-analogue converter comprising:
• an input arranged to receive said digital input signal;
• an output for outputting said corresponding analogue output voltage;
• and
• conversion means, operatively coupled to said input and said output, for moving said output voltage from a reference value to a first value and then subsequently back to said reference value,
• wherein the magnitude of said first value corresponds with the value of the said digital input signal,
• said output voltage is moved from said reference value to said first value in a plurality of voltage steps between said reference value and the magnitude of said first value, and
• said output voltage is moved from said first value back to said reference value in a plurality of voltage steps between the magnitude of said first value and said reference value.