6 To read Excel files a LED display's diagonal should be around     94.9 inch
Character height should be at least  2.5 cm
Test for yourself the distance from where you can properly read the (computer generated filler) text
Legibility distances for LED displays
Angle of view (arc minutes) 20' 17' 14' 1'
Normal readability guideline based on 100% visual acuity Minimum readability guideline based on 100% visual acuity Just dicernable characters with proper luminance and contrast Distance from projection screen to first row at least
Distance to
projection screen (m)
1.9 2.2 2.8 1.4
Calibri 11
Default Excel font
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Distance to
projection screen (m)
4.1 4.9 6.0  
Calibri 24
Typical PPT font
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