Apple inc. (20250067595). Electronic Devices With Ambient Flicker Detection
Electronic Devices With Ambient Flicker Detection
Organization Name
Inventor(s)
Anand K. Chamakura of San Jose CA (US)
Stephen N. Sweet of San Jose CA (US)
Ali Motamed of San Francisco CA (US)
Dong Zheng of Los Altos CA (US)
Jianjun Guo of San Jose CA (US)
Chau H. Nguyen of Santa Clara CA (US)
Electronic Devices With Ambient Flicker Detection
This abstract first appeared for US patent application 20250067595 titled 'Electronic Devices With Ambient Flicker Detection
Original Abstract Submitted
an electronic device may have a sensor to measure ambient flicker. the sensor may be a sigma-delta converter. the flicker may be calculated based on the voltage output of the sigma-delta converter and the number of times the sigma-delta converter is triggered during a predetermined period, thereby reducing the voltage output. in particular, a fast fourier transform (fft) may be used on these values to determine the flicker. if desired, filtering and/or non-uniform sampling may be incorporated to avoid aliasing. additionally or alternatively, a lomb-scargle spectral analysis may be used to prevent the attenuation of the measured flicker signals. as an alternative to using a sigma-delta converter to determine ambient flicker, a folding capacitive transimpedance amplifier (c-tia) circuit or a circuit with an analog to digital converter and digital filter may be used to measure the ambient flicker.