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Optoelectronics

ams launches the industry’s smallest module to offer color, ambient light and proximity sensing

ams AG (SIX: AMS), a leading provider of high performance sensors and analog ICs, today launched the smallest ever optical sensor module that delivers a combination of color (RGB), ambient light and proximity sensing, providing OEMs with design flexibility and the ability to provide a better display viewing experience.

The TMD3700 footprint, at 4.00 x 1.75mm, is the smallest footprint available in the market, and with height of 1.00mm, it’s low-profile is ideal for next-generation mobile phones with extremely tight layout and mechanical design constraints. It’s wide 45 degree field-of-view, ambient light sensing accuracy of +/-10% and operating range of 200mlux to 60Klux behind dark glass, enable smartphones to measure the surrounding light environment and automatically adjust display color and brightness for optimal viewing.

New High-Resolution Digital Biosensor for Wearable Applications

The Optoelectronics group of Vishay Intertechnology introduces a new fully integrated proximity and ambient light sensor optimized for heart rate and pulse oximetry measurements in wearable devices. The Vishay Semiconductors VCNL4020C combines an IR emitter, broad sensitivity photo diode and ambient light photo diode, a signal processing IC, and a 16-bit ADC in a compact 4.9 mm by 2.4 mm by 0.83 mm surface-mount package. The new biosensor features an interrupt function and supports I2C bus communication interface.

Osram modifies its ambient light sensor to achieve outstanding signal quality

The new SFH 2440 photodiode from Osram Opto Semiconductors combines short switching times with a spectral sensitivity optimized for visible light. The component enables high-quality heart rate measurements to be made with the aid of green LEDs. Typical applications include wearables such as fitness armbands and smartwatches. With its greatly reduced sensitivity to infrared light, SFH 2440 is also ideal as an ambient light sensor.

Shine or illuminate? Developing what the market needs

From smart bulbs in private households to efficient greenhouse lighting to attractively staged architecture, depending on the application soft or signal colours might be needed. The light might need to simply shine, or illuminate something else. So OSRAM Opto Semiconductors has added a new method to its colour LED manufacturing capabilities. Normally, the semiconductor crystals in LEDs generate the colours directly. This gives a narrow spectrum peak (for example, 600 to 630 nanometres for red), which the human eye perceives as a very piercing light. By contrast, the new production method uses only blue semiconductors as a basis. A luminescent material with the desired colour is added in packaging, i.e. assembly. As a result the LED covers a wider spectrum (550 to 700 nanometres for red) and the colour appears softer. With this innovation, OSRAM Opto Semiconductors is able to make LEDs with exactly the kind of light its customers need. It also meets all other industry-specific requirements, as a look at the following key applications will demonstrate.

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