This part of IEC 62977 provides practical information on light measuring devices (luminance meters, colorimeters, and spectroradiometers) with luminance measuring optics for the characterization of electronic displays.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions, and abbreviated terms 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 3.2 Abbreviated terms 4 General information on LMDs for photometry and colorimetry 4.1 General 4.2 Photometry and colorimetry for electronic displays <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.3 LMDs for luminance and chromaticity measurements 4.3.1 Configuration of LMDs <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Figures Figure 1 \u2013 Block diagrams of three types of LMDs Figure 2 \u2013 Example of configurations for the input optics and detector <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.3.2 Input optics of LMDs 4.3.3 Electronic system of LMDs Figure 3 \u2013 Example of input optics for the luminance meters Figure 4 \u2013 Block diagram of a typical electronic system <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3.4 Calibration of LMDs 4.3.5 Maintenance of LMDs 4.4 Setup conditions for measurement 4.4.1 LMDs 4.4.2 DUTs 4.4.3 Environment 5 Influence of LMD properties on luminance and chromaticity measurements 5.1 General <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.2 Repeatability 5.2.1 General 5.2.2 Example of the repeatability of an LMD Figure 5 \u2013 Examples of the repeatability of an LMD as a function of luminance <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.3 Accuracy 5.3.1 General 5.3.2 Example of the accuracy of an LMD 5.3.3 Linearity Figure 6 \u2013 Examples of the accuracy of an LMD as a function of luminance <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.3.4 Range change 5.4 Luminance range 5.5 Spectral properties of the spectroradiometer 5.5.1 General 5.5.2 Wavelength accuracy and spectral bandwidth <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure 7 \u2013 Calculated relative luminance difference as a function of wavelength error <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure 8 \u2013 Calculated relative luminance difference as a function of spectral bandwidth <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure 9 \u2013 Calculated chromaticity differences as a function of wavelength error <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure 10 \u2013 Calculated chromaticity differences as a function of spectral bandwidth <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.6 Spectral properties of the filter-type luminance meter and colorimeter 5.6.1 General 5.6.2 Spectral responsivity <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure 11 \u2013 Calculated relative luminance difference as a function of f1′ <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.6.3 Methods to reduce the measurement difference Figure 12 \u2013 Calculated chromaticity differences as a function of f1′, xyz <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.7 Angular response of LMDs 5.7.1 General 5.7.2 Subtended angles <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.7.3 Consideration of the input optics Figure 13 \u2013 Angular aperture and measurement field angle Figure 14 \u2013 Calculated relative luminance difference and chromaticitydifference as a function of the angular aperture <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.8 Measurement field 5.8.1 General Figure 15 \u2013 Diagram of light rays in object space telecentricand non-telecentric optical design <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 5.8.2 Number of pixels within the measurement field 5.9 Polarization 5.9.1 General Figure 16 \u2013 Calculated chromaticity difference as a function of the number of pixels <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 5.9.2 Polarization dependence of LMDs Figure 17 \u2013 Measured luminance variation as a functionof the rotation angle of the polarizer <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.10 Temporal synchronization 5.10.1 General 5.10.2 Temporal synchronization of the LMD and DUT <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 6 Influence of LMD properties on measurements of the optical characteristics of electronic displays 6.1 General 6.2 Contrast ratio 6.2.1 General 6.2.2 Calculated influence of LMD properties on the contrast ratio measurements Figure 18 \u2013 Calculated relative luminance differences as a function of sampling period <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Tables Table 1 \u2013 DUT characteristics for the calculations <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Table 2 \u2013 Calculated results of the contrast ratio by three LMDs <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 6.3 Electro-optical transfer function (EOTF) 6.3.1 General 6.3.2 Calculated influence of the LMD properties on the EOTF measurements <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 6.4 Chromaticity gamut area 6.4.1 General 6.4.2 Calculated influence of LMD properties on the chromaticity gamut area measurements Figure 19 \u2013 Total measurement times for 0,3 % repeatability (2\u03c3) in three LMDs Table 3 \u2013 Calculated durations of the EOTF measurements <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure 20 \u2013 Calculated relative difference, \u0394GAxy, by spectroradiometers Table 4 \u2013 Chromaticity gamut area of three DUTs <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 6.5 Viewing direction characteristics 6.5.1 General 6.5.2 Calculated influence of the LMD properties on the viewing direction characteristics measurements Figure 21 \u2013 Calculated relative difference, \u0394GAxy, by colorimeters <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure 22 \u2013 Cone of light rays for calculating the tristimulus values measured by an LMD with the angular aperture, \u03b1, and an optical axis at an inclination angle, \u03b8LMD <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 6.5.3 Measurement field at an oblique direction Figure 23 \u2013 Calculated luminance and chromaticity dependence as a functionof the inclination angle for the 2\u00b0, 6\u00b0, and 10\u00b0 angular apertures <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 6.6 Spatial uniformity 6.6.1 General 6.6.2 Calculated influence of LMD properties on uniformity and non-uniformity measurements Figure 24 \u2013 Measurement field and test pattern <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Table 5 \u2013 Non-uniformity of DUTs <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | 6.7 Response time 6.7.1 General 6.7.2 Measurement of the response time Figure 25 \u2013 Calculated non-uniformity difference by the filter-type colorimeters <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure 26 \u2013 Measurement setups for response time measurements Figure 27 \u2013 Response curves measured at different sampling rates <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Figure 28 \u2013 Measured response subjected to various low-pass filterings Table 6 \u2013 Rise times calculated from a measured responsesubjected to various low-pass filterings <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 6.8 Flicker 6.8.1 General 6.8.2 Measurement method of the flicker Figure 29 \u2013 Measured response curves switched from the 10 % to 90 % level Table 7 \u2013 Rise times measured by LMDs of various V(\u03bb) fidelities <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 6.8.3 Low-pass filter of LMDs Figure 30 \u2013 Schematic measured temporal luminance modulationof the LCD with a common voltage offset <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Figure 31 \u2013 Conceptual pseudo-temporal luminance modulation Figure 32 \u2013 Simulated luminance modulations with and without high frequency noise <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Annex A (informative)Photometry and colorimetry A.1 General A.2 Photometry A.3 Colorimetry A.3.1 General <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | A.3.2 Standard colorimetric observer A.3.3 Tristimulus values A.3.4 Chromaticity diagram and colour space <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Annex B (informative)Method for reducing the measurement difference of colorimeters B.1 General B.2 Matrix calibration methods for colorimeters B.2.1 Matrix calibration process 1: RGB calibration <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | B.2.2 Matrix calibration process 2: RGBW calibration <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Annex C (informative)Input data in Clause 5 and Clause 6,and calculation methods in 5.8 and 6.5 C.1 General C.2 Characteristics of DUTs C.2.1 Spectral radiances of the DUTs Figure C.1 \u2013 Spectral radiances <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | C.2.2 Directional characteristic of the DUT C.2.3 Temporal modulation characteristics of the DUT C.2.4 EOTF characteristics of the DUTs Figure C.2 \u2013 Inclination angle dependence Figure C.3 \u2013 Temporal modulation of the luminance <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | C.2.5 Uniformity characteristics of the DUTs Figure C.4 \u2013 EOTF characteristics Table C.1 \u2013 Measured luminance and chromaticity at the nine positions of DUT-1 <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | C.3 Characteristics of the filter-type LMDs C.3.1 Spectral responsivities of the filter-type LMDs Table C.2 \u2013 Measured luminance and chromaticity at the nine positions of DUT-2 <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | C.3.2 Specifications of filter-type LMDs Figure C.5 \u2013 Spectral responsivity of the colorimeter <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | Figure C.6 \u2013 Repeatability of three LMD models Table C.3 \u2013 Specifications of filter-type LMDs <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | C.4 Influence of the number of pixels within the measurement field Figure C.7 \u2013 Three positions of a circular measurement field relative to the RGB stripes <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | C.5 Validity of the viewing direction dependence obtained by a simplified method Figure C.8 \u2013 Configuration to measure DUT emissionby the LMD at the inclination angle, \u03b8LMD <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | Figure C.9 \u2013 Inclination angle dependence calculated by two methodsusing an LMD with an angular aperture of 10\u00b0 <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Annex D (informative)Instabilities of DUTs in measurement D.1 General D.2 DUT instabilities Figure D.1 \u2013 Changes of luminance and chromaticity after switching the grey levels Table D.1 \u2013 Luminance and chromaticity transition <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | Figure D.2 \u2013 Changes of luminance after switching from the black to grey level Table D.2 \u2013 Luminance changes in two measurements <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electronic displays – Generic. Practical information on the use of light measuring devices<\/b><\/p>\n |