Samsung Patents a Foldable Phone That Tunes Its Vibration to How Far You've Opened It
Your phone knows when it's ringing. Samsung is now patenting a way for a foldable phone to know exactly how open it is, and to change the strength and pattern of its vibration accordingly.
What Samsung's fold-angle haptic system actually does
You're holding your folding phone halfway open, propped on a table at a weird angle, and a notification comes in. The vibration feels off because the phone has no idea it's in that position. Samsung is working on a fix.
The patent describes a three-panel foldable device with a central body and two wings that fold out on either side. Each wing has its own vibration motor. Sensors track how far each wing is open, and the phone's processor uses those two readings to figure out the total angle between the wings. Then it adjusts which motor fires, how hard, and for how long.
The goal is simple: make the haptic feedback feel right no matter what shape the phone is in. A fully flat phone and a half-folded phone are physically very different objects, and Samsung is betting the vibration should feel different too.
… control at least one of the first vibration or the second vibration via at least one of the first actuator or the second actuator on the basis of the relative angle, wherein the first angle and the second angle are each obtained using a plurality of sensors.
Translation: Sensors track the opening angles so the device can adjust its haptic feedback accordingly.
How the processor calculates the gap between two folding panels
The device described has three housings: a central spine and two outer panels (left and right), each connected to the spine by its own hinge. Each outer panel contains a separate actuator (a small motor that produces vibration).
A set of sensors continuously measures two angles: the angle between the left panel and the spine, and the angle between the right panel and the spine. The processor then combines those two readings to derive a relative angle, meaning the total spread between the two outer panels regardless of where the spine sits.
Based on that derived angle, the processor can:
- Change the intensity of vibration in one or both panels
- Fire one actuator but not the other
- Adjust timing or pattern of the vibration output
This matters because a single actuator designed for a flat, candy-bar phone behaves differently when part of the device mass is folded at 90 or 120 degrees. The patent's approach lets the software compensate for the physical configuration in real time rather than firing a fixed vibration and hoping it feels consistent.
What this means for foldable phone feel and feedback
Haptic feedback, the buzz you feel when a notification arrives or a button is tapped, is one of those small things that shapes whether a phone feels cheap or polished. On a standard flat phone it's a solved problem. On a foldable with moving parts, the same motor output can feel completely different depending on how the device is positioned, because the mass and surface area in contact with your hand keep changing.
Samsung has been selling foldables long enough to know this is a real friction point. A system that reads fold position and adjusts vibration accordingly is a straightforward quality-of-life fix. Whether it makes a noticeable difference in everyday use depends entirely on the calibration work that happens after the patent.
This is the 71st Samsung foldable phone patent applications we've tracked since May, adding to ideas like dual cover screen windows and angle-based app switching.
The hardware this patent needs already exists in Samsung's foldable lineup: hinges, sensors, and vibration motors are all standard equipment. That makes the shortest path to shipping this a firmware or software update rather than a new physical component, which is a meaningful distinction.
The tricky part is calibration. The patent claims the system can tune vibration based on fold angle, but the document doesn't specify how Samsung would determine the right output for each configuration. That mapping work, figuring out what 'correct' haptic feedback feels like at 60 degrees versus 120 degrees, is the real engineering problem, and it lives outside this filing.
As patents go, this is incremental and focused. It doesn't reinvent foldables; it patches a specific annoyance that anyone who has used a foldable phone has probably noticed without being able to name. That's often where the most durable product improvements come from.
There are more where this came from
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The drawings
29 drawing sheets from US 2026/0267418 A1 · click any drawing to enlarge
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