ambient light sensorsTexas Advanced Optoelectronic Solutions announced the first members of its next generation digital ambient light sensor (ALS) and proximity detection family. These devices are said to eliminate the need to use clear glass/plastic in front of the sensor or drill holes/slots into the display, bezel or frame in order for light to reach the sensor. Specifically designed to operate behind darkened glass or other translucent materials, the TSL2771 device family provides both ambient light sensing and proximity detection in a single device that consumes far less power than currently available comparable solutions, according to the company. The TSL2771 family incorporates an IR LED current-limited driver, analog-to-digital conversion (ADC), interrupt capability, multiple I2C interface voltage options and flexible programming allowing it to be configured into many different applications. As darkened glass or translucent materials can be transparent to IR wavelengths while attenuating visible light by 100 times or more, the device uses a patented dual-photodiode architecture that allows the sensor system to compensate for the increased IR component. When combined with the ability to adjust the analog gain settings up to 128X, the device is desirable in challenging low-light level applications.

Texas Advanced Optoelectronic Solutions