The ROHM Semiconductor Ambient Light Sensor IC family efficiently controls LED backlighting for LCD-equipped devices. The ROHM Semiconductor Ambient Light Sensor IC features ROHM´s proprietary trimming process and uses multiple photodiodes with different junction depths to provide an accurate output with little variation between various light sources. The spectral response of the ROHM Semiconductor Ambient Light Sensor IC family closely matches the human eye for accurate light measurement. These features allow the ICs to provide uniform visibility for LCDs over a wide range of ambient light levels and sources, from incandescent or fluorescent light to full sunlight.