Optical Specifications - Waveshare 4.2inch e-Paper V2 User Manual

8. OPTICAL SPECIFICATIONS

Measurements are made with that the illumination is under an angle of 45 degree, the detection
is perpendicular unless otherwise specified.
Symbol Parameter
R Write Reflectivity
CR Contrast Ratio
GN 2 Grey Level
T update Image update time
Life
Notes:
8-1. Luminance meter: Eye-One Pro Spectrophotometer.
8-2. CR=Surface Reflectance with all white pixel/Surface Reflectance with all black pixels.
8-3. WS: White state, DS: Dark state
Conditions Min
White 30
Indoor 8:1
-
At 25℃
Topr
28
Typ.
35
DS+(WS-DS)*n(m-1)
3
1000000times or 5years
4.2inch e-Paper V2
User Manual
Max Units Notes
- % 8-1
- 8-2
8-3
- sec