How-to guide 04 · Video, LED & content
How to make event screens readable, camera-safe and properly integrated with the space.
The moment
A large screen can still be hard to read
Screen size alone does not guarantee clarity. The useful image is shaped by viewing distance, content detail, pixel pitch or projection resolution, brightness, contrast, sightlines and the surrounding light. Begin with the audience: where is the closest seat, the farthest seat and the most difficult angle? Define whether people need to recognise a face, read a headline or analyse detailed data. Then select the display and calculate the exact canvas, aspect ratio and pixel map. Protect safe areas for cameras, captions and platform graphics. Integrate screens with scenery so the architecture supports the message rather than framing it awkwardly. Every technical choice should trace back to what the audience needs to understand.
Step 01
Design content at the final pixel map
Build templates at the exact output resolution from the start. Use generous type sizes, strong hierarchy and concise copy; a slide that works on a laptop may fail at the back of a ballroom. Keep essential text away from seams, scenic masks and irregular edges. Test brand colours against the real display, because brightness and ambient light change perceived contrast. WCAG’s 4.5:1 contrast ratio for normal text is a useful baseline, but event displays, camera exposure and long viewing distances require practical testing too. Create safe layouts for names, captions, data and sponsor marks. Export representative motion, fine patterns and gradients early, then review them from the audience’s actual closest and farthest positions.
Step 02
Synchronise display, camera and playback
LED refresh, processor settings, camera shutter and content frame rate must work together. Test for moiré, scan lines, colour shifts and flicker in wide and close shots. Confirm whether scenic LED, confidence monitors and relay screens need different feeds. Match playback machines, switchers and processors to the agreed colour space and signal format. Document every input, output and conversion, including embedded audio. Keep show content versioned and build a verified backup playback path with matching fonts and codecs. Rehearse last-minute changes through the real approval route; an untracked update can break timing or overwrite a correction. Record a reference frame so the team can quickly identify drift on show day.
AVIXA DISCAS relates display image size, content detail and viewing distance. WCAG 2.2’s 4.5:1 minimum is a useful contrast baseline for normal text, not a substitute for in-room testing.
Step 03
Check the whole viewing system
Use a pre-show checklist that joins design and engineering.
Confirm final pixel maps, scaling and aspect ratios.
Inspect every seat for sightline and legibility.
Test brightness in the actual lighting states.
Check titles, captions, sponsor marks and data at distance.
Review moiré and refresh on every camera.
Verify playback, spare machines and failover content.
Confirm confidence feeds and presenter blocking.
AVIXA DISCAS relates image size, content detail and audience viewing distance. Use it as a design framework, then prove the result in the room with the real content.
Good to know
AVIXA DISCAS relates display image size, content detail and viewing distance. WCAG 2.2’s 4.5:1 minimum is a useful contrast baseline for normal text, not a substitute for in-room testing.
Sources
Take it with you
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