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Optoelectronics/Displays??

Photo-IC ambient light sensor brightens CE, PCs

Posted: 08 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:light sensor? ambient photo-IC? PC CE?

Toshiba America Electronic Components Inc. introduces the TPS859, an ultracompact device to its family of photo-IC ambient light sensors (ALS). Developed by Toshiba Corp. the new photo-IC sensor incorporates a photodiode, a current amplifier and a luminous-efficiency correction (LEC) function in a single chip that is ideal for use in flat-panel displays and various home appliances, and is also suitable for use in cellphones, notebook PCs, PDAs, camcorders, digital cameras, and other equipment requiring luminosity adjustment. The sensor can be used to turn a keypad or LCD backlight on or off, or adjust the brightness according to the ambient light condition.

The TPS859 provides ultra-high sensitivity with light current (IL) of 230A compared with 40A in the previous generation TPS852an almost 6x improvement. The device also employs a new optical filtering technology which achieves luminous efficiency near to that of the human eye. The filter is able to reduce the ratio of incandescent to fluorescent IL from 1.2 (typ.) in the TPS852 to 1.0 (typ.) for the TPS859.

Toshiba's RoHS-compatible TPS859 photo-IC ALS features an ultracompact surface-mount package that measures 1.6mm x 1.6mm x 0.55mm. The TPS859 can operate from 1.8V to 5.5V, which makes it ideal for battery-powered applications.

Samples of the Toshiba TPS859 Photo-IC ALS are available now, priced at $0.35 each in 10,000-piece quantities.





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