New ‘smart’ image sensors with built-in ISP will boost battery life, image clarity in AR/VR headsets, smart doorbells and security cameras
Leading embedded hardware specialist onsemi has announced its lowest-power image sensor family, the Hyperlux LP, targeted at applications like smart doorbells and security cameras for homes/offices, AR/VR headsets, machine vision and video conferencing. Notably the sensors have built-in intelligent functions that are normally relegated to external image processors. Their low power mode can supposedly extend battery life by up to 40% in some devices.
The sensors 1.4 µm pixel sensors are available in 5, 8.3 and 20 MP variants. Thanks to an innovative silicon design and pixel architecture, they deliver what onsemi claims is “industry-leading image quality” and “crisp, vibrant images even in difficult lighting conditions”, in both visible and near infrared light.
Coming to the aforementioned smart features, ‘Wake on Motion’ allows the sensor to operate in a low-power mode, drawing a fractional amount of power. Upon detecting movement, it switches almost instantly to its high performance state. Another one is ‘Smart ROI’, which can output one region of interest (ROI) at reduced bandwidth, to give a context view of the scene, and a separate ROI in full resolution, making it easier to select either bandwidth or detail as the priority.
These features, plus on-chip subsampling options like pixel binning, offload some of the image signal processor’s workload by pre-processing the data, further saving power and increasing system performance. The low power draw also reduces heat generation, leading to lower thermal noise in the image, and making heat sinks unnecessary.
All these advantages should benefit devices like smart doorbells, battery powered security cameras, AR/VR headsets – basically multi-sensor, battery-powered vision systems that currently compromise on image quality to achieve acceptable efficiency levels. Customers can expect fewer battery changes/recharges, as well as clearer images from devices that cost less.
You can buy the new Blink Outdoor 4 Floodlight Wire-free smart security camera with motion detection, and the Blink video doorbell on Amazon.