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Below are assumptions for the above 3x projectors edge blending system Excel calculation.
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Screen Size: 6.5m*1.5m with watching distance within 2m (pixel pitch less than 2mm)
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Input signal resolution: 3840*800 (Pixel pitch is 6500mm/3840=1.7mm = 1.7m
watching distance, optimized vertical resolution is the same as projector native
resolution: 800)
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Number of projectors: 3 projectors
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Projector resolution and lumens. 1280*800 (native resolution), 3200 ANSI Lumen
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Overlap pixels and dimension. 8 grids=8*32= 256 pixels (50cm)
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Projector throw ratio: 1.2-1.7 (based on projector spec)
How to operate Excel Spreadsheet
Input all the data in Yellow column, including Source Resolution, Projector Resolution
(EdgePro output resolution), Screen size, Projector throw ratio, Projector Lumens, No. of
projector and Overlap Pixels. User can try different configurations and select most cost
effective one
User will get below data from the Spread Sheet.
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Final image size for each projector is 250cm*1.56cm with Overlap region of 50cm in
width.
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The image height should be higher than the required one. User can draw the vertical
height to required dimensions through geometry alignment. The vertical adjustment
range in each edge is 600 pixels.
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Optimized content resolution: 3328*800 (This is the ideal resolution to set EDID). It is
suggested to select the same vertical resolution (800) as projector native resolution to
get the best result.
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Installation distance: 3m-4.25m.
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It is calculated from throw ratio and image wide for each projector. (2.5m*1.2=3m,
2.5m*1.7=4.25m)
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The overlap value in Video Wall setting:
When user sets Video Wall Zoom, it will split the image equally for each
projector. However, we need to install the projectors with some Overlap
Pixels for edge blending. Therefore, Overlap Value is to crop more pixels for
each section based on the Overlap size between two adjacent projectors.
LH Projector: select RH edge: +197 (to crop more 197 pixels for LH projector.
These 197 pixels are based on source resolution.
Projector (Center): LH edge=+98, RH edge=+99 (total 197)
RH Projector: LH edge: +197
After finish setting, user can check the image, if some overlap area is blurred,
user can increase or decrease Overlap Value with 1-2 pixels and select
optimized one.
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The final luminance is 819 Lux. It will be enough for inside room environment.
