Oled display with integrated ambient light measurement system

A display system for visually presenting information, comprising:

• an organic light emitting diode (OLED) screen including a field of diodes to provide voltage to the screen to emit light in one direction and receive light and detect voltage in an opposite direction;
• at least one switch configured to provide the voltage to the field of diodes of the OLED screen;
• a timing controller coupled to the at least one switch and configured to control the at least one switch during a measurement mode to reverse a polarity of one diode of the field of diodes to receive light and to detect the voltage in the opposite direction;
• a sample and hold amplifier configured to receive the voltage from the field of diodes in the measurement mode, the received voltage indicative of an ambient light level next to the field of diodes;
• and
• a controller configured to provide a brightness adjustment based on the indicated ambient light level as determined from the received voltage at the OLED screen in the opposite direction.