Ambient Light Sensor Leakage Compensation for Full-Screen Displays

The patent extracts and removes the harmful screen leakage light component from the mixed light signal collected by the sensor. By separating the leakage light component (which can be calculated based on screen brightness and leakage characteristics) from the total light signal, the system obtains the pure ambient light component for accurate detection, thus resolving the interference caused by screen light leakage.

The patent introduces an intermediary calculation model that relates screen leakage light to screen brightness parameters. By using this intermediary relationship (leakage light = f(screen brightness, leakage coefficient)), the system can compensate for the leakage effect and accurately recover the ambient light intensity, enabling the sensor to function accurately despite the harmful interference from screen leakage.

The patent implements a feedback mechanism where the system continuously monitors screen brightness and calculates the corresponding leakage light component, then subtracts this from the sensor reading to obtain accurate ambient light values. This feedback loop ensures that the brightness adjustment decisions are based on accurate ambient light data, preventing power saving decisions from being compromised by leakage interference.

The patent replaces direct mechanical/optical isolation solutions with a computational approach. Instead of physically blocking screen leakage light with additional components, the system uses signal processing and mathematical models to subtract the leakage component from the sensor signal, achieving accurate measurement through computational rather than physical means.