Pen Display Tablet

Overview

A pen display is a screen you draw on directly: the cursor appears under the nib instead of on a separate monitor, so it feels like marking paper. It is used by illustrators, retouchers, and CAD users who want to work hand-over-image. The tablet is a display first and a digitizer second, the host computer drives it like an external monitor while it sends pen strokes back as input.

The visible surface is the Display Module, an LCD laminated under an etched cover glass. Hidden behind the panel is the EMR Sensor Board, the grid that tracks the pen, and the Driver / Scaler Board that scales the host video and runs the panel. Drawing is done with the bundled EMR Stylus. The host connects through the I/O Port Cluster, the tablet is propped by the Folding Stand, and the Internal Wiring ties the boards together inside the Rear Cover.

How it works

Pen tracking uses electromagnetic resonance. The EMR Controller Board energizes the antenna grid in the sensor board, broadcasting a magnetic field through the panel. The pen contains an Resonant Coil, an LC circuit, that absorbs this energy and re-emits it. When the grid switches to listen, it picks up that returned signal; whichever coils hear it loudest pinpoint the pen, with no battery ever needed in the stylus. Nib force shifts the circuit's resonance through the Pressure Sensor, which the controller reads as 8,192 pressure levels, and the field's angle gives tilt.

Meanwhile the Driver / Scaler Board handles the picture: its Scaler IC times the incoming HDMI or USB-C video to the panel's native resolution and the Backlight Driver sets brightness. Because the Optical Laminate removes the air gap between glass and LCD, the rendered line sits directly beneath the physical nib, so what the pen reports and what the screen shows stay aligned across the surface.