Voltage supply device and method for driving a display

A voltage supply device for a display and comprising:

• a voltage supply unit comprising:
• an input terminal configured to receive a supply voltage;
• and
• a plurality of output terminals including a first output terminal and a second output terminal, the first output terminal configured to provide a first voltage level, the second output terminal configured to provide a second voltage level and to provide a third voltage level different from and subsequent to the second voltage level;
• and
• a controller unit configured to provide a control signal to the voltage supply unit;
• and
• wherein the voltage supply unit is configured to set the second and third voltage levels in dependence on the control signal.

A display system comprising:

• a voltage supply device comprising:
• an input terminal for receiving a supply voltage level;
• and multiple output terminals;
• and
• a display configured to receive a drive signal having a cycle comprising multiple intervals, the display is configured to operate in response to the drive signal, wherein the drive signal includes:
• a first voltage level during a first interval of the cycle, the first voltage level including a first output voltage at a first output terminal of the multiple output terminals of the voltage supply device, and
• a first pair of voltages comprising a second voltage level and a third voltage level that is different from the second voltage level;
• and
• wherein, during different periods of a second interval of the cycle, the second voltage level includes a second output voltage and the third voltage level includes a third output voltage at a second output terminal of the multiple output terminals of the voltage supply device.

A method for a voltage supply device to drive a display with a drive signal having more than one voltage during a cycle thereof, the method comprising:

• providing, by the voltage supply device operating during a first period and at an output terminal, a first output voltage;
• providing, by the voltage supply device operating during a second period, different from the first period, and at the output terminal, a second output voltage different from the first output voltage;
• providing the first output voltage and the second output voltage as a first portion of the drive signal to the display;
• and
• providing, from an additional output terminal of the voltage supply device, an additional output voltage as a second portion of the drive signal to the display.