BS EN 62595-2:2013
$102.76
LCD backlight unit – Electro-optical measurement methods of LED backlight unit
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 20 |
This part of IEC 62595 series specifies the standard measurement conditions and measuring methods for determining electrical, optical, and electro-optical parameters of LED backlight units for liquid crystal displays.
NOTE Other backlights (Cold Cathode Fluorescent Lamps (CCFLs), External Electrode Fluorescent Lamps (EEFLs), Hot Cathode Fluorescent Lamps (HCFLs), Carbon Nano Tube (CNT), etc.) are excluded from this standard.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 4 General measurement conditions 4.1 Standard atmospheric conditions for LED BLU 4.2 Measuring setup |
| 8 | 4.3 Warm-up time Figures Figure 1 – Example of measuring setup for LED BLU |
| 9 | 5 Measurement methods 5.1 Electrical measurement methods 5.1.1 Conditions 5.1.2 Current 5.1.3 Voltage 5.1.4 Power consumption Figure 2 – Example of warm-up characteristic of BLU |
| 10 | 5.2 Optical measurement methods 5.2.1 Conditions 5.2.2 Luminance 5.2.3 Luminance uniformity Figure 3 – Definition of zenith angle θ and azimuth angle diameter |
| 12 | 5.2.4 Spectral power distribution 5.2.5 Chromaticity 5.2.6 Colour uniformity Figure 4 – Examples of measurement point layout |
| 13 | 5.2.7 Correlated colour temperature 5.2.8 Angular luminance uniformity 5.2.9 Angular colour uniformity Figure 5 – Angular luminance uniformity measurement |
| 14 | 5.2.10 Measurement methods of block-wise BLU Figure 6 – Example of test pattern (8 x 10 segments) for block-wise BLU Figure 7 – Example of incoherent point spread function |
| 15 | Figure 8 – Example of test pattern of incoherent point spread function Figure 9 – Example of test pattern of crosstalk |
| 16 | Annex A (informative) Practical measurement methods of block-wise BLU Figure A.1 – Measurement of average slope of incoherent point spread function |
| 17 | Figure A.2 – Black box pattern for crosstalk measurement using LCD Figure A.3 – Example of crosstalk measurement results using LCD |
| 18 | Bibliography |
