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BS IEC 62977-2-1:2021 Electronic displays - Measurements of optical characteristics. Fundamental measurements, 2021
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- CONTENTS
- FOREWORD
- INTRODUCTION
- Tables [Go to Page]
- Table 1 – Summary of display characteristics
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- 3.2 Abbreviated terms
- 4 General [Go to Page]
- 4.1 Measured basic quantities
- 4.2 Electrical driving of the display (depending on the nature of the display)
- 4.3 Data acquisition timing and display driving [Go to Page]
- 4.3.1 Stationary measurements
- 4.3.2 Properties of display under test
- 5 Standard measuring conditions [Go to Page]
- 5.1 Standard measuring environmental conditions
- 5.2 Standard measuring darkroom conditions
- 5.3 Standard setup conditions [Go to Page]
- 5.3.1 General
- 5.3.2 Adjustment of display
- 5.3.3 Starting conditions of measurements
- 5.3.4 Conditions of measuring equipment
- Figures [Go to Page]
- Figure 1 – Layout diagram of measurement setup with terminology
- 5.4 Location of measurement field
- 5.5 Standard test patterns
- 5.6 Viewing direction coordinate system
- Figure 2 – Example of measurement locations with nine measurement locationsequally spaced in the display active area
- 6 Simple box optical measurement methods [Go to Page]
- 6.1 General
- 6.2 Test patterns
- Figure 3 – Representation of the viewing direction, or direction of measurement
- 6.3 Luminance [Go to Page]
- 6.3.1 Purpose
- 6.3.2 Measuring conditions
- 6.3.3 Measuring method
- Figure 4 – Example of centre box test patterns using the standard 4 % and10 % area boxes
- 6.4 Darkroom contrast ratio [Go to Page]
- 6.4.1 Purpose
- 6.4.2 Measuring conditions
- 6.4.3 Measuring method
- 6.5 Luminance uniformity [Go to Page]
- 6.5.1 Purpose
- 6.5.2 Measuring conditions
- 6.5.3 Measuring method
- Figure 5 – Example of uniformity measurement locationswith nine measurement locations
- 6.6 Chromaticity [Go to Page]
- 6.6.1 Purpose
- 6.6.2 Measuring conditions
- Table 2 – Example of luminance of white, red, green, and blue measuredat nine screen locations and the resulting average luminance [Go to Page]
- 6.6.3 Measuring method
- 6.7 White chromaticity and correlated colour temperature [Go to Page]
- 6.7.1 Purpose
- 6.7.2 Measuring conditions
- 6.7.3 Measuring method
- 6.8 Chromaticity non-uniformity [Go to Page]
- 6.8.1 Purpose
- 6.8.2 Measuring conditions
- 6.8.3 Measuring method
- 6.9 Chromaticity/colour gamut area [Go to Page]
- 6.9.1 Purpose
- 6.9.2 Measuring conditions
- Table 3 – Example of a white colour measured at nine screen locationsand the resulting chromaticity non-uniformity [Go to Page]
- 6.9.3 Measuring method
- Table 4 – Standard digital-equivalent input signals for rendering the white,primary and secondary colours in test patterns
- Figure 6 – Examples of a display with colour boundaries representedby the black triangle in two common chromaticity diagrams [Go to Page]
- 6.9.4 Chromaticity/colour gamut area in CIE 1931 and CIE 1976 chromaticity diagram
- 6.10 Luminance and colour variation with viewing direction [Go to Page]
- 6.10.1 Purpose
- 6.10.2 Measuring conditions
- 6.10.3 Measuring method
- Figure 7 – Top view example of configurations for measuring luminance and colourin the horizontal viewing direction
- 7 Display multi-colour optical measuring methods [Go to Page]
- 7.1 General
- 7.2 Test patterns
- Figure 8 – Side view example of configurations for measuring luminanceand colour in the vertical viewing direction
- Figure 9 – Standard medium APL loading version of the colour tile test pattern with red,green, blue, and white boxes used for luminance and colour measurements
- Figure 10 – Medium APL loading version of colour tile patterns illustrating the sequence of test patterns used for luminance and colour measurements
- 7.3 Luminance [Go to Page]
- 7.3.1 Purpose
- 7.3.2 Measuring conditions
- Figure 11 – Standard medium APL RGBCMY test pattern used forcentre luminance and colour measurements with 25 % APL [Go to Page]
- 7.3.3 Measuring method
- Figure 12 – Sequence for measuring luminance at the nine display locationsfor all coloured tile patterns
- 7.4 Darkroom contrast ratio [Go to Page]
- 7.4.1 Purpose
- 7.4.2 Measuring conditions
- 7.4.3 Measuring method
- 7.5 Luminance uniformity
- 7.6 Chromaticity, tristimulus values, and spectra [Go to Page]
- 7.6.1 Purpose
- 7.6.2 Measuring conditions
- 7.6.3 Measuring method
- 7.7 White chromaticity and correlated colour temperature [Go to Page]
- 7.7.1 Purpose
- 7.7.2 Measuring conditions
- 7.7.3 Measuring method
- 7.8 Chromaticity/colour gamut area [Go to Page]
- 7.8.1 Purpose
- 7.8.2 Measuring conditions
- 7.8.3 Measuring method
- 7.8.4 Chromaticity/colour gamut area in CIE 1931 and CIE 1976 chromaticity diagram
- 7.9 Chromaticity non-uniformity
- 7.10 Luminance and colour variation with viewing direction [Go to Page]
- 7.10.1 Purpose
- 7.10.2 Measuring conditions
- 7.10.3 Measuring method
- 8 CIELAB colour gamut volume [Go to Page]
- 8.1 Purpose
- 8.2 Measuring conditions
- 8.3 Measuring method
- Figure 13 – Example of range in colours produced by a given displayas represented by the CIELAB colour space
- Table 5 – Example of report format for CIELAB gamut volume
- Annex A (normative)RGB boundary colours for CIELAB colour gamut volume measurements [Go to Page]
- A.1 General
- A.2 Equally-spaced 98 boundary colours on the RGB cube
- Table A.1 – Equally-spaced 98 RGB boundary colours used for CIELABcolour gamut volume measurements
- A.3 Recommended 602 boundary colours on the RGB cube
- Table A.2 – Recommended RGB boundary colours used for CIELABcolour gamut volume measurements
- Annex B (informative)Calculation method for CIELAB gamut volume [Go to Page]
- B.1 Purpose
- B.2 Procedure for calculating the colour gamut volume
- Figure B.1 – Analysis flow chart for calculating the CIELAB gamut volume
- B.3 Number of sampled colours
- B.4 RGB cube surface subdivision method for CIELAB colour gamut volume calculation
- Figure B.2 – Example of tessellation using a 5 x 5 gridof surface colours on the RGB cube
- Table B.1 – Example data format used for CIELABcolour gamut volume measurements
- Figure B.3 – Example of tessellation for the RGB cube using a 3 x 3 grid
- Figure B.4 – Example of tessellation for the CIELAB gamut volume using a 3 x 3 grid
- Annex C (informative)Significance of Clause 6 [Go to Page]
- C.1 Summary
- C.2 Significance of Clause 6 during the research and development stage
- Figure C.1 – Example of conceptual scheme for the supply chain of displays and the usage of the measurement methods (MM) of Clause 6 and Clause 7
- C.3 Significance of Clause 6 during the manufacturing stage
- Figure C.2 – Conceptual example of the evaluation of the components
- C.4 Significance of Clause 6 during the evaluation of other test results
- Figure C.3 – Example of a mechanical stress test
- Annex D (informative)Colour-signal luminance
- Annex E (informative)Gamut rings [Go to Page]
- E.1 General
- E.2 Visualization method
- Figure E.1 – Example of transformation of the CIELAB gamut volume (top) illustrated by L* slices into the concentric areas of the gamut ring representation (bottom)
- E.3 Software example
- Figure E.2 – Example of calculation of gamut rings using the data from Table B.1
- Bibliography [Go to Page]
