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ActLight’s Dynamic PhotoDetector (DPD) technology introduces a revolutionary approach to light sensing.

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Registered patents for our light sensors


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High Sensitivity

Traditionally, photodiodes rely on a constant reverse bias voltage to produce a weak photocurrent, necessitating additional amplification. ActLight’s DPD technology tunes sensitivity down to a single photon. By operating at pulsed voltages with a forward bias inducing a large current after a triggering time dependent on light intensity, DPD measures the delay time of the significant forward current, eliminating the need for amplification and ensuring high sensitivity even in low light conditions.

Ultra-Low Power Consumption

Unlike traditional sensors, our DPD operates solely on Vdd, eliminating the need for high voltage and streamlining system design. This low-voltage feature not only enhances energy efficiency but also simplifies integration across various applications. With ActLight’s DPD, unlock unparalleled performance while minimizing power consumption.

Low Cost

ActLight achieves cost-effectiveness through the use of low-cost technologies such as standard CMOS in fabricating the DPD sensor. The Embedded DPD version, designed with integrated Front-End circuits on the same chip, further reduces costs by minimizing silicon area through the absence of complex analog circuits.


Our DPD sensors are engineered for compactness without sacrificing performance. Utilizing advanced design and manufacturing techniques, they offer exceptional sensitivity, accuracy, and dynamic range in a smaller size. From wearables to smartphones, our technology enables superior light sensing capabilities in a compact form factor.

The Only Patented Light Sensor Your Devices Need.

Precision Light Sensing, Swiss Excellence

Discover our research processes by watching our videos

Our Purpose 0:56

See how we research and refine our silicon wafers to fine-tune every detail for optimal sensitivity.

Enhancing Smartwatches 1:34

Learn why our technology meets the high standards of Swiss-made excellence demanded by the watch-tech industry.

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Reach out directly to learn why our Swiss-engineered technology is ideal for cutting-edge smartwatches.

ActLight's DPD technology extends its versatility
through two main versions: Embedded and Stand-Alone.

Embedded DPD

Stand-Alone DPD

Learn About DPD For

Wearable Devices And Beyond