Lyssensor til LCD-baggrundsbelysning
ROHM lancerer ny serie af 'ambient' lysssorer til brug i forbindlelse med styring af LCD baggrundsbelysning (in english).
ROHM Semiconductor announces a new family of analogue and digital Ambient Light Sensor (ALS) ICs for the efficient control of LED backlighting for LCD-equipped devices. These ALS ICs are ideal for a multitude of portable electronics products such as mobile phones, digital cameras, PDAs, notebooks a.o., requiring enhanced visibility, independent of a wide range of illumination conditions as well as optimized power consumption.
Featuring ROHM's proprietary trimming process and use of multiple photodiodes with different junction depths, they provide an accurate output with only little variation between various light sources.
The spectral response of ROHM ALS ICs has been tailored to closely match that of the human eye for accurate light measurement. These features combine to provide uniform visibility for LCDs over a wide range of ambient light levels and sources – from incandescent or fluorescent light to full sunlight.
The ROHM ALS IC family includes the BH16xx (analogue) / BH17xx (digital) series.
BH16xx analogue series devices provide a linear current output proportional to luminous intensity ranging from 0 to 100,000 lux. These units feature ROHM's unique three-level gain selection providing exceptional design flexibility in matching power consumption to the specific application requirements.
