CALIBRATION OF RAMP DIGITAL TO ANALOG CONVERTER

摘要

A source driver including: a current source that provides an approximately constant current; a channel coupled to a source electrode and including a digital to analog converters (DAC), the DAC including: a voltage source that applies an output voltage to the source electrode based on the approximately constant current provided by the current source; and a control unit having circuitry that: inputs a digital value; and terminates, based on the digital value, charging of the voltage source by the approximately constant current; and a calibration unit having circuitry that: generates a comparison between a test voltage applied by the voltage source with a target voltage; and modifies the approximately constant current based on the comparison.

主权项

1. A source driver for a display, comprising:
a current source that provides an approximately constant current; a channel coupled to a source electrode and comprising a digital to analog converters (DAC), the DAC comprising:
a voltage source that applies an output voltage to the source electrode based on the approximately constant current provided by the current source; anda control unit comprising circuitry that:
inputs a digital value; andterminates, based on the digital value, charging of the voltage source by the approximately constant current; and a calibration unit comprising circuitry that:
generates a comparison between a test voltage applied by the voltage source with a target voltage; andmodifies the approximately constant current based on the comparison.