BenQ SX930, Service Manual

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Chart 1 Example of Pixel Testing Pattern (60” screen size)
A.16 Defocus and Flare Test Procedure
Procedure:
Step 1: Get best focus image (best uniform) with Pattern1
Step 2: Check specified screen sizes and zoom positions
Step 3: Use Chart1 to measure defocus and flare of R,G,B color at Pattern 2,3,4
Example of 1.5 pixel flare:
Remark:
1. Abnormal focus: Example: double pixel
A.17 Definition of “Slight flare”
Slight flare is observed with following steps:
1.
Slight flare is measured with the “Line” in pattern “Cross hatch with dots”
2. A slight flare is defined as flare with very faint brightness compares to “Normal Flare” in
“Line”. Please refer to the drawing below:
3. To use 50% ND filter for slight flare judgment.(Except defocus/flare spec 3/4)
4. Slight Flare is not accounted as flare. (Except defocus/flare spec 3/4)
1.5 pixels
Grid of 1.5
pixels
Flare
Defocus
1 Pixel