Sony Patent: Camera Pixels That Switch Between Image Capture and Motion Detection
Sony has filed a patent for a camera sensor where every single pixel can act either as a traditional image-grabber or as a motion detector, depending on what the scene demands.
What Sony's switchable camera pixel actually does
Every time a fast-moving object blurs across a photo, your camera was caught doing only one thing: collecting light at a fixed rate. That fixed rate is why sports photos blur and why security cameras miss quick events.
Sony's patent describes a sensor where each pixel contains two circuits and a switch. One circuit captures a full image the normal way. The other watches for sudden changes in light, the kind caused by something moving fast, a ball crossing the frame, a car door opening. A tiny electronic switch inside each pixel decides which job that pixel does at any given moment.
The clever part is that every pixel is built identically, whether it ends up doing image capture or motion detection. That uniform construction is the core of what Sony is protecting here, because inconsistent pixels are a common source of image artifacts and sensor noise.
… a switching circuit that switches a circuit connected to the photoelectric conversion element to the first pixel circuit or the second pixel circuit.
Translation: A tiny switch changes what the pixel does based on whether it is recording video or tracking motion.
How the switching circuit routes each pixel's output
Traditional camera sensors use two fundamentally different types of pixels side by side: imaging pixels that record light intensity to build a photo, and event detection pixels that fire a signal only when the light level changes suddenly. Mixing these two types in one chip is hard because they have different circuit needs, and their characteristics drift from each other over time or temperature.
Sony's patent sidesteps that problem by making every pixel structurally identical. Each pixel contains:
- A photoelectric conversion element (the part that turns light into electrical current, essentially a photodiode)
- A first pixel circuit that generates an event signal (a flag saying "light just changed here")
- A second pixel circuit that generates a standard image signal (a number representing brightness)
- A switching circuit that connects the photodiode to whichever of the two circuits is needed
Because imaging pixels and event pixels share the same physical template, their electrical characteristics stay matched. That consistency, called uniformity in sensor engineering, reduces the kind of fixed-pattern noise that shows up as a faint grid or blotchiness in photos.
The switching approach also means the sensor could, in theory, reassign pixels dynamically, dedicating more of the array to event detection when the scene is fast-moving and reverting to full imaging when things are still.
an event detection pixel that outputs, on the basis of a photocurrent obtained by photoelectrically converting incident light, a detection signal indicating that a light amount of the incident light has changed; …
Translation: One pixel type senses when the light level changes to detect motion.
What this means for cameras that never miss a moment
For consumers, the payoff would be cameras that handle fast motion far better without needing a separate dedicated chip. Event-based sensing is already used in high-speed industrial cameras and some robotics vision systems, but bringing it to a standard image sensor in a phone or mirrorless camera would let the device respond to motion in microseconds rather than milliseconds.
Sony makes image sensors for a huge portion of the world's smartphones, including Apple's iPhones, so even an incremental change in their sensor architecture ripples across hundreds of millions of devices. The image sensor space is one of the more technically dense areas covered in plain-English patent summaries, and Sony files steadily here as it tries to keep event-based sensing from being purely an industrial curiosity.
The hardware described here is buildable today: Sony already manufactures event-based sensors commercially, so the switching circuit concept is an engineering refinement well within reach. The shortest path to a product is probably a high-end smartphone or automotive camera module where the extra silicon area per pixel is worth paying for. The main open question is power draw, since running two internal circuits per pixel even in standby has costs the patent does not address. That gap puts this closer to a mid-term research milestone than a feature arriving in next year's phone.
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The drawings
19 drawing sheets from US 2026/0238896 A1 · click any drawing to enlarge
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