ISO 9241-303:2011
Ergonomics of human-system interaction — Part 303: Requirements for electronic visual displays
ISO 9241-303:2011 establishes image-quality requirements, as well as providing guidelines, for electronic visual displays. These are given in the form of generic (independent of technology, task and environment) performance specifications and recommendations that will ensure effective and comfortable viewing conditions for users with normal or adjusted-to-normal eyesight.
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1 Scope
2 Normative references
3 Terms and definitions
4 Guiding principles
5 Ergonomic requirements and recommendations
5.1 Viewing conditions
5.1.1 General
5.1.2 Design viewing distance
5.1.3 Design viewing direction
5.1.4 Gaze and head tilt angles
5.1.5 Displays for virtual images
5.2 Luminance
5.2.1 General
5.2.2 Illuminance
5.2.3 Display luminance
5.2.4 Luminance balance and glare
5.2.5 Luminance adjustment
5.3 Special physical environments
5.3.1 General
5.3.2 Vibration
5.3.3 Wind and rain
5.3.4 Excessive temperatures
5.4 Visual artefacts
5.4.1 General
5.4.2 Luminance non-uniformity
5.4.3 Colour non-uniformity
5.4.4 Contrast uniformity
5.4.5 Geometric distortions
5.4.6 Screen and faceplate defects
5.4.7 Temporal instability (flicker)
5.4.8 Spatial instability (jitter)
5.4.9 Moiré effects
5.4.10 Other instabilities
5.4.11 Unwanted reflections
5.4.12 Unintended depths effects
5.5 Legibility and readability
5.5.1 General
5.5.2 Luminance contrast
5.5.3 Image polarity
5.5.4 Character height
5.5.5 Text size constancy
5.5.6 Character stroke width
5.5.7 Character width-to-height ratio
5.5.8 Character format
5.5.9 Between-character spacing
5.5.10 Between-word spacing
5.5.11 Between-line spacing
5.6 Legibility of information coding
5.6.1 General
5.6.2 Luminance coding
5.6.3 Blink coding
5.6.4 Colour coding
5.6.5 Geometrical coding
5.7 Legibility of graphics
5.7.1 General
5.7.2 Monochrome and multicolour object size
5.7.3 Contrast for object legibility
5.7.4 Colour considerations for graphics
5.7.5 Background and surrounding image effects
5.7.6 Number of colours
5.7.6.1 Simultaneous colour presentation
5.7.6.2 Visual search for colour images
5.7.6.3 Conspicuity of colours
5.7.6.4 Colour interpretation from memory
5.8 Fidelity
5.8.1 General
5.8.2 Colour gamut and reference white
5.8.2.1 Colour gamut
5.8.2.2 Reference white
5.8.3 Gamma and grey scale
5.8.4 Rendering of moving images
5.8.5 Image formation time (IFT)
5.8.6 Spatial resolution
5.8.7 Raster modulation or fill factor
5.8.8 Pixel density
6 Conformance
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1 Scope
2 Normative references
3 Terms and definitions
4 Guiding principles
5 Ergonomic requirements and recommendations
5.1 Viewing conditions
5.1.1 General
5.1.2 Design viewing distance
5.1.3 Design viewing direction
5.1.4 Gaze and head tilt angles
5.1.5 Displays for virtual images
5.2 Luminance
5.2.1 General
5.2.2 Illuminance
5.2.3 Display luminance
5.2.4 Luminance balance and glare
5.2.5 Luminance adjustment
5.3 Special physical environments
5.3.1 General
5.3.2 Vibration
5.3.3 Wind and rain
5.3.4 Excessive temperatures
5.4 Visual artefacts
5.4.1 General
5.4.2 Luminance non-uniformity
5.4.3 Colour non-uniformity
5.4.4 Contrast uniformity
5.4.5 Geometric distortions
5.4.6 Screen and faceplate defects
5.4.7 Temporal instability (flicker)
5.4.8 Spatial instability (jitter)
5.4.9 Moiré effects
5.4.10 Other instabilities
5.4.11 Unwanted reflections
5.4.12 Unintended depths effects
5.5 Legibility and readability
5.5.1 General
5.5.2 Luminance contrast
5.5.3 Image polarity
5.5.4 Character height
5.5.5 Text size constancy
5.5.6 Character stroke width
5.5.7 Character width-to-height ratio
5.5.8 Character format
5.5.9 Between-character spacing
5.5.10 Between-word spacing
5.5.11 Between-line spacing
5.6 Legibility of information coding
5.6.1 General
5.6.2 Luminance coding
5.6.3 Blink coding
5.6.4 Colour coding
5.6.5 Geometrical coding
5.7 Legibility of graphics
5.7.1 General
5.7.2 Monochrome and multicolour object size
5.7.3 Contrast for object legibility
5.7.4 Colour considerations for graphics
5.7.5 Background and surrounding image effects
5.7.6 Number of colours
5.7.6.1 Simultaneous colour presentation
5.7.6.2 Visual search for colour images
5.7.6.3 Conspicuity of colours
5.7.6.4 Colour interpretation from memory
5.8 Fidelity
5.8.1 General
5.8.2 Colour gamut and reference white
5.8.2.1 Colour gamut
5.8.2.2 Reference white
5.8.3 Gamma and grey scale
5.8.4 Rendering of moving images
5.8.5 Image formation time (IFT)
5.8.6 Spatial resolution
5.8.7 Raster modulation or fill factor
5.8.8 Pixel density
6 Conformance