Method for sensing light being incident on an electronic device

A method for sensing light being incident on an electronic device, the electronic device comprising a display and a light sensor arrangement mounted behind the display such as to receive incident light through the display, the method comprising the steps of:

• periodically switching the display on and off depending on a control signal, wherein a period is defined by a succession of an on-state and an off-state of the display,
• generating a sensor signal by integrating the incident light by means of the light sensor arrangement for a total integration time comprising a number of periods,
• determining a first signal count from the sensor signal being indicative of an amount of integrated incident light during an on-state,
• determining a second signal count from the sensor signal being indicative of an amount of integrated incident light during an off-state,
• determining a third signal count from the sensor signal being indicative of an amount of integrated incident light during the total integration time, and
• determining an ambient light level depending on the first, second and third signal counts;
• and
• wherein the first and second signal counts are determined in close temporal succession, or the first and second signal counts are determined within a time period given by 15%, 10%, 5%, or 1% of the duration of a period.

A method for sensing light being incident on an electronic device, the electronic device comprising a display and a light sensor arrangement mounted behind the display such as to receive incident light through the display, the method comprising the steps of:

• periodically switching the display on and off depending on a control signal, wherein a period is defined by a succession of an on-state and an off-state of the display,
• generating a sensor signal by integrating the incident light by means of the light sensor arrangement for a total integration time comprising a number of periods,
• determining a first signal count from the sensor signal being indicative of an amount of integrated incident light during an on-state,
• determining a second signal count from the sensor signal being indicative of an amount of integrated incident light during an off-state,
• determining a third signal count from the sensor signal being indicative of an amount of integrated incident light during the total integration time, and
• determining an ambient light level depending on the first, second and third signal counts;
• and
• wherein ambient light level is determined depending on weighted first, second and third signal counts;
• and
• wherein the first, second and third signal counts are weighted by weighting factors determined by the duty cycle and/or the picture refresh signal.