Emission Unit Brightness Adjustment

An electronic device comprising:

• a display comprising an emission unit;
• a light sensor configured to generate a signal indicative of ambient light level;
• a memory in which filtering instructions and emission control instructions are stored;
• and
• a processor configured to implement the filtering instructions to generate first and second filtered representations of the ambient light level in accordance with the signal, the first and second filtered representations using first and second sampling periods, respectively, the first sampling period being shorter than the second sampling period;
• wherein the processor is further configured to implement the emission control instructions to determine a direction in which the ambient light level is trending, and to generate a control signal that, based on the direction, increases a brightness level of the emission unit in accordance with the first filtered representation or decreases the brightness level in accordance with the second filtered representation.

A method of controlling an emission unit of a display, the method comprising:

• obtaining sensor data acquired by a light sensor responsive to ambient light level;
• generating first and second filtered representations of the ambient light level in accordance with the sensor data, the first and second filtered representations using first and second sampling periods, respectively, the first sampling period being shorter than the second sampling period;
• determining a direction in which the ambient light level is trending;
• and
• generating a control signal that, based on the direction in which the ambient light level is trending, increases a brightness level of the emission unit in accordance with the first filtered representation or decreases the brightness level in accordance with the second filtered representation.