OSRAM Opto Semiconductors' two new proximity sensors (SFH7740 and SFH7741) use distance measurements to detect a mobile device's operating status without physical contact. This allows for automatic shut-off of displays and keypads, improving performance and efficiency of products such as cell phones and digital cameras. The SFH7740, with optical touch switch, measures just 3.7 by 3.7 by 1.0 mm and reacts to distances between 0.5 and 4.0 mm. The SFH7741 reacts at a typical working distance of 20 mm and is suitable for a wide range of applications.

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