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ROHM recently completed development of two ambient light sensor LSI models. The BH1600FVC and BH1710FVC feature outstanding spectral sensitivity and are ideally suited for portable electronic devices. |
It is possible to improve both the performance efficiency and visibility of LCDs by making brightness adjustments based on the ambient light. Precise control is needed in order to maximize the effects of these improvements. However, the brightness sensitivity range of conventional ambient light sensors differs greatly from that of the human eye. Furthermore, the measurement results of conventional ambient light sensors vary between different light sources, such as sunlight and artificial light. ROHM's BH1600FVC and BH1710FVC ambient light sensors, on the other hand, feature spectral sensitivity characteristics similar to the photopic luminous efficiency of the human eye, making it possible to measure a broad range of illumination intensities, from darkness to direct sunlight. In addition, the sensitivity is greatly improved - approximately 10% compared with up to 4 times, depending on the type of light source applied, resulting in stable operation. Moreover, both analog and digital output sensors are available, making them compatible with a wide variety of applications.
The BH1600FVC analog output type ambient light sensor features a two-level output current gain adjustment - an industry first - as well as low voltage operation. The BH1710FVC digital output type incorporates a 16-bit A/D converter, is capable of precisely measuring a wide range of intensities in 1-lux increments, and can directly output the illumination intensity digitally - also an industry first - making it possible to eliminate conventionally required external operation processing.
The market for electronic products is constantly expanding. ROHM will continue to develop products that improve the efficiency and performance of electronic devices such as LCDs, maintaining its reputation as a world-class semiconductor manufacturer.
Main Features of BH1600FVC and BH1710FVC
- Spectral sensitivity characteristics close to the photopic luminous efficiency of the human eye.
- Unique photo IC technology minimizes the difference in output resulting from different light sources, resulting in stable operation.
Main Features of BH1600FVC
- Current output with two-level gain adjustment (60 µA/100 lux and 6 µA/100 lux).
- Integrated shutdown function.
- Wide operating supply voltage range: 2.4 to 3.6 V.
Main Features of BH1710FVC
- Compatible with the I2C bus interface.
- Supports a wide optical input range (equivalent to an illumination intensity range from 1 to 65,536 lux).
- Incorporates an A/D converter, eliminating the need for external components.
- Half the power consumption of competing products.
For more information on these items or the full range of Rohm products available from Anglia please call +44 (0)1945 474747 or email info@anglia.com
