Low power display device with variable refresh rates

A computing device, comprising:

• a display device;
• and
• a buffer circuit configured to perform steps that include:
• receiving, in response to an identification of an image presentation deficiency, a reference voltage input selection from a timing controller of the computing device, wherein the buffer circuit is configured to operate in one of multiple modes based on a rate of change of the reference voltage input selection;
• comparing the reference voltage input selection to a plurality of register values;
• selecting a target reference voltage value based on the comparing;
• when the display device is operating at a reduced refresh rate, increasing a luminosity of the display device according to the selected target reference voltage and the reduced refresh rate;
• and
• when the display device is operating an increased refresh rate, decreasing the luminosity of the display device according to the selected target reference voltage and the increased refresh rate.

A method for operating a buffer circuit of a display device, the method comprising:

• by the buffer circuit:
• receiving, in response to an identification of an image presentation deficiency, a reference voltage input selection from a controller of the display device;
• comparing the reference voltage input selection to a plurality of register values;
• selecting a target reference voltage value based on the comparing;
• employing an output bias at least based on the selected target reference voltage;
• when the display device is operating at a reduced refresh rate, increasing a luminosity of the display device according to the selected target reference voltage and the reduced refresh rate;
• and
• when the display device is operating an increased refresh rate, decreasing the luminosity of the display device according to the selected target reference voltage and the increased refresh rate.