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A15. ANSI COLOR UNIFORMITY
ANSI Color Uniformity: u’v’= [(u’1-u’0)^2+(v’1-v’0)^2]^1/2
(u’0,v’0): the average color of L1~L13
(u’1,v’1): the spot with maximum deviation from (u’0,v’0)
A16. PROJECTION OFFSET
Projection Offset= Image height above projection lens optical axis / Total image height x
100%
Note: Optical engine should be kept horizontal attitude
A17. Customer Defined Focus
i. Focus test procedure (Wide only)
a. Pattern: Cross Hatch (Refer to A27 for all related test patterns)
b. Steps:
Step 1: Get best focus at Screen Center with “Phon Pattern”
Step 2: Check “Cross Hatch” at 60”, Wide position.
Step 3: Observe R, G, B color separately and check “Center and 4 corners of
screen” for “Defocus” and “Flare” (Check line only, no check point)
Step 4: Good (“Defocus” << A, “Flare” << B)Æ No more check needed
Step 5: LimitÆ Check “Defocus” (60” <A pixels)
Check “Flare” (60” <B pixels)
Step 6: Worst unit of the dayÆ Check “Letter pattern” (Screen to Observer 6m,
Wide and Tele same spec) with:
“Defocus” < C pixels
“Flare“ < D pixels
ii. Criteria: Measure the flare size with agreed “Grid” paper and as follows:
1.5 pixels
Grid of 1.5
p
ixels
Flare
Defocus
1 Pixel