Waveshare 7.3inch e-Paper (E) - Page 25

7.3inch e-Paper (E)
User Manual
22
8.3 REFLECTION RATIO
The reflection ratio is expressed as:
R = Reflectance Factor
whiteboard
x ( L
center
/ L
whiteboard
)
L
center
is the luminance measured at center in a white area (R=G=B=1). L
whiteboard
is the
luminance of a standard whiteboard. Both are measured with equivalent illumination source. The
viewing angle shall be no more than 2 degrees.