SFH 7770 E6

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Introduction

SFH 7770 E6 is an ambient light, infrared and ultraviolet sensor from is a high performance Silicon Ambient Light Sensor family designed for smartphone, tablet, and hybrid camera applications. This sensing technology uses a unique combination of sensitive material and circuitry to measure all three emission bands from any light source and auto-range for best performance. The E6 model has a higher spectrum range than the previous E3 model and also greater dynamic range to distinguish between brighter and darker lighting conditions.

Application fields

SFH 7770 E6 offers significant benefits to mobile phone and tablet manufacturers, such as improved battery efficiency. It can be used to measure ambient light in order to optimise the power output of the display, while also providing functions such as backlight control, guided reading, and camera white balance. The device also provides the ability to rapidly detect the brightness of any environment in order to control additional functions such as gesture recognition and auto picture brightness adjustment. When used in hybrid cameras, the E6 model is able to detect an indication of both daylight and infrared light sources.

Working principle

The working principle of the SFH 7770 E6 is based on the detection of three separate emission bands – visible light, infrared, and ultraviolet – using a Silicon Photo Diode and multiple waveband filters. This detection sensitively detects the three emission bands, and then calculates the visible light intensity using the ratio of the measured values. This allows the sensor to correctly measure varying light conditions produced by any light source, including natural daylight, artificial lighting, and the light produced from any display.

Conclusion

The SFH 7770 E6 is an advanced optical sensor providing reliable measurement of ambient lighting in both mobile phone and camera applications. By combining a Silicon Photo Diode and waveband filters, the E6 model is able to accurately measure visible light, infrared, and ultraviolet emissions in order to optimise mobile display functions and camera settings. As such, this makes it a very useful tool for both hardware designers and software programmers.

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