page 73
Digital Projection E-Vision Laser WQ120 Series
CHOOSING A LENS
Rev A May 2018
Calculating TRC
To calculate TRC, use the following formula:
1.60 (DMD™ aspect ratio)
Source aspect ratio
TRC =
TRC table
Alternatively, you can save time by referencing the following table, which shows the TRC value for some popular image formats:
Image Aspect Ratio
WQXGA
TRC
2.35:1 (Scope)
2560 x 1089 pixels
TRC = 1
1.85:1 (Flat)
2560 x 1384 pixels
TRC = 1, not used
1.78:1 (16:9)
2560 x 1440 pixels
TRC = 1, not used
1.66:1 (Vista)
2560 x 1542 pixels
TRC = 1, not used
1.6:1 (16:10)
2560 x 1600 pixels
TRC = 1.0, not used (native aspect ratio)
1.33:1 (4:3)
2128 x 1600 pixels
TRC = 1.20
1.25:1 (5:4)
2000 x 1600 pixels
TRC = 1.28
Notes
TRC can only be applied if greater
than 1. If TRC is 1 or less, disregard
it and calculate the throw ratio using
the basic formula.
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