Overview
EN ISO 9241-303:2011 - part of the ISO 9241 ergonomics series - defines generic, technology‑neutral image‑quality requirements and guidelines for electronic visual displays. It specifies performance objectives and recommendations to ensure effective, comfortable viewing for users with normal or corrected vision. The document is published by CEN as a European adoption of ISO 9241-303:2011 and is intended for a wide range of display technologies and use environments.
Key Topics
The standard addresses practical ergonomic and image‑quality aspects, including:
- Viewing conditions: design viewing distance, viewing direction, gaze/head tilt and virtual image displays.
- Luminance and contrast: ambient illuminance, display luminance, luminance balance, glare control and adjustment.
- Special environments: guidance for displays subjected to vibration, wind, rain or extreme temperatures.
- Visual artefacts and instabilities: luminance/colour non‑uniformity, geometric distortion, flicker, jitter, moiré and unwanted reflections.
- Legibility and readability: luminance contrast, image polarity, character height, spacing, and text formatting for readable on‑screen text.
- Information coding and graphics: recommendations for luminance, blink, colour and geometrical coding, plus graphic object sizing and contrast.
- Fidelity and image rendering: colour gamut, reference white, gamma/greyscale, rendering of moving images, image formation time, spatial resolution and pixel density.
- Conformance and guidance: procedures for demonstrating compliance and informative annexes (visual perception, virtual display objectives, accessibility bibliography).
Applications
EN ISO 9241-303:2011 applies wherever human–system visual interaction matters:
- desktop monitors and office workstations
- industrial and control‑room displays and consoles
- kiosks, ATMs and information terminals (IT peripheral equipment)
- head‑mounted and virtual displays (virtual image performance objectives)
- outdoor and mobile displays exposed to environmental stresses
Implementing these requirements improves usability, reduces visual fatigue, and supports safety and performance in operational settings.
Who uses this standard
- Ergonomists and human factors specialists
- UX/UI and information designers
- Display and monitor manufacturers
- System integrators and product engineers
- Procurement, compliance and occupational health & safety professionals
- Accessibility and assistive‑technology practitioners
Related standards
- ISO 9241 series (overview in Annex A) - broader ergonomics of human‑system interaction.
- EN ISO adoption: this document is published by CEN as EN ISO 9241-303:2011.
Keywords: EN ISO 9241-303:2011, ergonomics, electronic visual displays, image‑quality requirements, display ergonomics, luminance, contrast, legibility, visual artefacts, ISO 9241.
