e-ink effect

e-ink effect applied to the studio's source frame — beforee-ink effect applied to the studio's source frame — afterSourceEffect

01/ ORIGIN

Electrophoretic displays came out of MIT Media Lab research in the 1990s and reached consumers when E Ink's screens shipped in the first e-readers of the following decade. They hold an image with no power at all, because charged pigment particles physically move and then stay where they were put. That is also the source of their defining flaw: clearing the previous image is mechanical, imperfect, and slow, which is why a faint ghost of the last page persists.

02/ SWEEP

PIXEL sweep

PIXEL 1: the finest particle grid, tone almost continuous
PIXEL 1pxPIXEL 1: the finest particle grid, tone almost continuous
PIXEL 4: the mid grid, individual pigment cells becoming visible
PIXEL 5pxPIXEL 4: the mid grid, individual pigment cells becoming visible
PIXEL 8: the coarsest grid, tone reduced to chunky pigment blocks
PIXEL 8pxPIXEL 8: the coarsest grid, tone reduced to chunky pigment blocks

03/ SPEC

This effect reproduces an electrophoretic panel: a hard tonal reduction toward black and white with a faint retained image beneath it. GHOSTING runs from 0 to 0.8 with a default of 0.22 and sets how much of the previous frame remains visible, which is the artifact that distinguishes e-ink from any other one-bit reduction. REFRESH from 1 to 20 seconds controls how often the panel fully clears, so it only matters on moving sources. PIXEL scales the particle grid from 1 to 8 pixels, and THRESHOLD is an advanced balance control. In kott the ghost is composited per pixel rather than as an overlay.

GHOSTING0 to 0.8 · default 0.22
REFRESH1 s to 20 s · default 7 s
PIXEL1 px to 8 px · default 1 px

04/ FAQ

What is an e-ink effect?
An e-ink effect imitates an electrophoretic display: a hard black and white reduction with a faint ghost of the previously shown image retained underneath it.
Why do e-ink screens show ghosting?
An electrophoretic panel holds its image by physically moving charged pigment particles, and clearing them is mechanical and imperfect. Some particles stay put, leaving a faint residue of the last page.
Does GHOSTING do anything on a still image?
Yes, but less than on video. On a still it blends a slightly offset copy of the same frame, which reads as softening. On moving footage it retains genuinely different previous content.