Overview
CEN ISO/TR 9241-308:2015 (ISO/TR 9241-308:2008) is a technical report in the ISO 9241 series that provides ergonomic guidance specifically for surface-conduction electron-emitter displays (SED). This document introduces SED technology into human‑system interaction standardization and gives initial guidelines for assessing the ergonomic and optical properties of SED-based visual display products. It is informative in nature and intended to support designers, test laboratories and ergonomics professionals working with SED displays.
Key Topics
- Scope and terminology: Defines SED and associated symbols/abbreviations used for ergonomic assessment.
- SED technology and panel structure: Describes the three main parts (rear plate, face plate, spacers), SCE emitters, phosphors, colour filters and black-matrix design that affect visual performance.
- Driving and operation: Line‑sequential scanning, scan and modulation signals, and basic operating principles (driving voltage, anode voltage, emission current).
- Optical and ergonomic characteristics:
- Isotropic optical behaviour similar to CRTs (luminance variation ≤ ~12% for inclinations up to 40°).
- Fast response time and uniform sharp focus comparable to CRT/LCD/PDP advantages.
- Known limitations at time of publication: typical larger minimum display size (36 in. and up) and fixed resolution.
- Typical product data: Example pixel pitch, active diagonal (36.1 in / 918 mm), front glass with anti‑reflective treatment and other design parameters useful for ergonomics evaluation.
- Guidelines for assessment: Measurement‑based recommendations, use of established CRT compliance methods as a basis for SED assessment, and intended context of use (design viewing distance, illuminance, viewing directions).
Applications and Users
This technical report is practical for:
- Ergonomists and human‑factors specialists assessing display usability and visual comfort.
- Display engineers and product designers developing or integrating SED technology into workstations, control rooms and imaging applications.
- Test laboratories and compliance teams performing optical and ergonomic measurements.
- Procurement and specifications writers who need standardized guidance on SED performance and intended context of use.
Use cases include high‑fidelity imaging, reality information presentation (faces, landscapes), indoor displays with specified illuminance and viewing-distance requirements.
Related Standards
- ISO 9241 series (ergonomics of human‑system interaction), notably:
Keywords: ISO/TR 9241-308, CEN ISO/TR 9241-308, SED, surface-conduction electron-emitter display, display ergonomics, human-system interaction, visual display ergonomics, ISO 9241.
