%100))L9L8,L7,L6,L5,L4,3,L2,,1(geL11)/Avera(Min(L10,)_( LLcornerDarkUniformityLight
L1, L2,…,L9, L10, L11: the lx reading of 13 ANSI points
4. Contrast measurement(JBMA)
First measure the light output of nature white pattern of ANSI nine points. Second,
measure the dark pattern as the same way. And calculate the ratio of them.
Test Pattern: Full White and Full Dark Test Pattern
Formula:
Average(L1,L2,L3,L4,L5,L6,L7,L8,L9) of NW : Average(L1,L2,L3,L4,L5,L6,L7,L8,L9) of
Dark
= NW(L1+L2+L3+L4+L5+L6+L7+L8+L9)/9 : Dark(L1+L2+L3+L4+L5+L6+L7+L8+L9)/9
5. TV DISTORTION
Unit: %
Brightness: Default
Contrast: Default
Measurement procedure (Projection Size 30 inch):
Measure the dimensions H1, H2 and H3, with H3 at the half image width, as shown above
for both zoom settings. For each the distortion is defined as:
VERTICAL
Measure the dimensions W1, W2 and W 3 at the half image height, as shown above. The
distortion is defined as:
HORIZONTAL