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Light sensor chip increases battery life
Ilse Jurriën : September 7th 2006 - 01:01 CET
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Capella MicrosystemsLight sensor chip increases battery life : Capella Microsystems, Inc. today announced the Filtron family of chips that detect the amount of ambient light surrounding notebooks and cellular phones, and adjusts the brightness of the liquid crystal displays (LCD) to provide an almost perfect match to the needs of the human eye. By providing such a close match, the device eliminates excessive backlighting and greatly increases battery life in portable products. Backlighting usually consumes more battery power than any other function. The new devices can increase the battery life of notebook computers by up to 41 percent, and increase the battery life of cell phones by up to 100 percent.
Light sensor chip increases battery lifeCapella Microsystems - Filtron chip
The chips also reduce eye strain because they closely match the brightness requirements of the human eye, and because of a built-in digital filter that removes flicker from ambient florescent lights. The Filtron devices increase the battery life in notebook computers, cell phones, DVD players, personal digital assistants (PDAs), global positioning systems (GPS), electronic book readers, video games, MP3 Players and internet pods (iPods). The devices are also used to control screen brightness in plasma and LCD television screens, and automobile dashboards. The devices are the industry's best at emulating the human eye because they are the first to use a proprietary optical filter technology called Filtron that only detects wavelengths in the range of 450 to 650 nm. The chips are made with mixed-signal technology and contain approximately 7,000 transistors. There are four applied patents for the technology used in the new devices.

Filtron devices - Light sensor technology
According to Cheng-chung Shih, President and CEO of Capella Microsystems, Inc., "The innovations in the Filtron family of devices represent an advance in the state-of-the-art for ambient light sensor technology. This advance was made possible by our technical team which has extensive experience in analog, CMOS/Bipolar and optics. We also worked closely with major manufacturers of portable products to ensure our technology matched their needs. The Filtron devices being announced today are in full production and have design wins at several major system manufacturers."

Microsystems sensor chip - Price & Availability
• The CM3200HS is in full production now. The device is available in a CMP (Clean Mold Compound Package) that measures 3 x 4 mm, and an OPLGA package that measures 1.8 x 2.35 x 1 mm. It is priced at 60 cents in a CMP package in quantities of 1,000.
• The CM3200 is in full production now. The device is available in a CMP that measures 3 x 4 mm, and an OPLGA package that measures 1.8 x 2.35 x 1 mm. It is priced at 60 cents in a CMP package in quantities of 1,000.
• The CM3000 is also in full production now. The device is available in a CMP that measures 3 x 4 mm, and an OPLGA package that measures 1.8 x 2.35 x 1 mm. It is priced at 55 cents in a CMP package in quantities of 1,000.

About Capella Microsystems
Capella Microsystems, Inc. is a privately held fabless semiconductor design company that develops optical electronic products. The company was founded in 1996 and its elite technical team consists of highly experienced experts in the design of analog, CMOS/Bipolar and analog optics circuits. It also has products for the UV sensor and RGB sensor markets. The company has offices in both the United States and Taiwan.

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