New miniature ambient light sensors from ams are a perfect fit for edge-to-edge smartphone displays

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News facts:

  • TSL2520/21 ambient light/flicker detection sensors designed to fit in the gap between the display screen and the chassis of a smartphone
  • High optical sensitivity and programmable gain give phone manufacturers the flexibility to choose the ideal glass and ink to deliver superior low-light performance
  • Accurate lux measurements and flicker detect capability up to 7kHz enable excellent
    display management and camera image correction

ams (SIX: AMS), a leading worldwide supplier of high-performance sensor solutions, today announces the TSL2520 and TSL2521 ambient light sensors which fit in a tiny bezel or gap to enable a smartphone’s screen to stretch from edge-to-edge of the chassis with no aperture.

By using the TSL2520/21 to maximize the viewable screen area, smartphone manufacturers can provide the best possible user experience while enabling effective camera image correction.

The ams TSL2520 is an ambient light sensor (ALS) which features four photodiodes for visible light sensing and two infrared photodiodes, a combination which allows for rejection of IR interference and produces very accurate measurements of ambient light intensity (lux). The photodiodes are placed at the end of the sensor’s 2mm x 1mm x 0.5mm package – the smallest in the market – which means that the device can be positioned at the gap between the display screen and the chassis of the phone to maximize the screen-to-body ratio.

The TSL2521 provides the same ALS function and the identical mechanical specifications as the TSL2520 but also offers flicker detection capability. Sensing flicker in artificial light sources such as LEDs at frequencies up to 7kHz, the TSL2521 provides an image correction input to the phone’s camera. This enables the camera to eliminate banding and other flicker-generated artefacts that can distort captured images and videos.

The sensors’ accuracy and high sensitivity, measuring ambient light levels down to just 1mlux, support responsive display brightness management and help improve camera image quality.

Jian Liu, Strategic Program Director in the Integrated Optical Sensors business line at ams, says: “ams offers the industry’s widest portfolio of optical sensors for display management and camera management in mobile phones. This latest offering, which provides discrete ambient light and flicker sensing capabilities, extends the choices available to phone manufacturers even further, enabling them to further expand the boundaries of smartphone screen-to-body ratio and display management performance.”

Flexible design options

Adding to the design flexibility which ams optical sensors afford, the TSL2520/21 products feature programmable gain which gives a dynamic range of 8192x. This means that the sensors can operate under any glass types and inks with any degree of light attenuation without requiring a visible aperture in the display glass.

Operating from a 1.8V supply and featuring configurable sleep modes, the TSL2520/21 sensors offer low power consumption to extend the run-time of the phone’s battery.

The TSL2520 and TSL2521 are available for sampling. For sample requests or for more technical information, go to https://ams.com/TSL2520 and https://ams.com/TSL2521.

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Über die ams-OSRAM AG

ams is a global leader in the design and manufacture of advanced sensor solutions. Our mission is to shape the world with sensor solutions by providing a seamless interface between humans and technology.

ams’ high-performance sensor solutions drive applications requiring small form factor, low power, highest sensitivity and multi-sensor integration. Products include sensor solutions, sensor ICs, interfaces and related software for consumer, communications, industrial, medical, and automotive markets.

With headquarters in Austria, ams employs around 9,000 people globally and serves more than 8,000 customers worldwide. ams is listed on the SIX Swiss Exchange (ticker symbol: AMS). More information about ams can be found at https://ams.com

ams is a registered trademark of ams AG. In addition many of our products and services are registered or filed trademarks of ams Group. All other company or product names mentioned herein may be trademarks or registered trademarks of their respective owners. Information provided in this press release is accurate at time of publication and is subject to change without advance notice.

Firmenkontakt und Herausgeber der Meldung:

ams-OSRAM AG
Tobelbader Strasse 30
A8141 Premstaetten
Telefon: +43 (3136) 500-0
https://ams.com

Ansprechpartner:
Amy Flecher
Vice President Marketing Communications
E-Mail: press@ams.com
Patricia Moosburger
Senior Manager
Telefon: +43 (3136) 50031235
E-Mail: patricia.moosburger@ams.com
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