HandPad
A new human-computer interaction model that turns the sides of your fingers into a continuous touch interface —
enabling precise control without holding a device and without relying on cameras.
Think: a trackpad built into your hand.
The problem
Spatial input today often depends on camera-visible gestures or controllers. That leads to fatigue, lower precision for continuous control, and awkward social signaling.
- Line-of-sight requirements (hands must be visible)
- Mid-air fatigue over longer sessions
- Lower precision for scrolling, scrubbing, sliders, and fine control
- Social visibility (obvious gestures in public or meetings)
What’s missing: a private, tactile, muscle-memory input layer — the spatial equivalent of a trackpad.
The insight
Your hands already have high tactile sensitivity and dexterity — but most interfaces ignore the lateral (side) surfaces of the fingers.
Handpad uses that unused surface area as the control plane.
How it works (concept)
- Touch zones along the sides of fingers act as continuous controls
- Gestures map to core actions (tap, swipe, hold, chord)
- Designed for a natural resting-hand posture
What it enables
Handpad supports a compact gesture grammar that scales from 2D control to spatial control.
| Traditional spatial input | Handpad |
|---|---|
| Camera-dependent, line-of-sight required | Touch-based, works without line-of-sight |
| Visible gestures; socially “loud” | Subtle and private interaction |
| Less precise for continuous control | Continuous tactile control for scrolling/scrubbing/sliders |
| Fatigue over time | Resting posture; reduced fatigue |
Where it applies: spatial computing and AR/MR, accessibility, discreet wearable input, and future form factors —
as a platform-level interaction primitive that complements gaze and voice.