Handwriting and Touch Experience
Stylus input, pressure sensing and low-latency ink are tuned together, so writing on an e-paper screen keeps up with the hand.
Why this is hard today
E-paper refreshes slowly by nature, while handwriting expects the ink to appear under the pen tip. A digitizer layer also sits inside an already tight stack-up, and any lag, jitter or palm touch during writing is noticed immediately.
Our ID/MD Design
- 01
Digitizer and touch stack
An inductive or capacitive digitizer is laminated under the panel, with pressure levels, tilt and palm rejection handled before the ink layer sees the input. Anti-glare surface treatment keeps the pen from sliding without dulling contrast.
- 02
Low-latency ink pipeline
Strokes are drawn locally from predicted points, and the panel uses partial refresh so only the changed area updates. Latency, sampling rate and smoothing are tuned as one budget instead of optimising the digitiser alone.
- 03
Writing feel and front light
Nib friction, surface texture and front-light diffusion are adjusted on prototypes, so lines look even across the screen and the writing surface does not feel like glass under the pen.
- 04
Calibration and validation
Each unit is calibrated for edge linearity and drift. Jitter, missed strokes, hover distance and accidental touch are tested in the reading posture, and firmware thresholds are fixed before mass production.
Scope a pilot for this solution
Share the line, systems and target metric. We will reply with a pilot plan.