BSI PD IEC TR 62595-1-3:2019
$102.76
Display lighting unit – Lighting units with arbitrary shapes
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 22 |
This part of IEC 62595 focuses on common issues of light emission such as spatial uniformity of luminance and colour, and angular distribution of luminance and colour, from lighting units with arbitrary shapes like flexible lighting sources (FLSs). This document provides a model of light emission from a curved FLS and of light measurement on a curved FLS. Because the development of flexible liquid crystal panels is in progress (see the notes), the intent of this document is to provide guidance for the development of future measurement standards. This document is applicable to FLSs either as light sources, products or elements with arbitrary shapes of geometrical curvature having different spectral and spatial characteristics of light emission.
NOTE 1 Almost 20 years ago plastic LCDs were developed and used in a few applications
NOTE 2 Flexible BLUs have been used for bendable LC panels in recent years.
NOTE 3 Recent transmissive and transflective flexible LCs require flexible BLUs.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 5 | FOREWORD |
| 7 | INTRODUCTION |
| 8 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions |
| 9 | 3.2 Abbreviated terms |
| 10 | 4 Flexible lighting units 4.1 General Figures Figure 1 – Examples of curved FLS and curved display |
| 11 | 4.2 FLSs possessing arbitrary curvature Figure 2 – FLS with an arbitrary curvature and measurement system |
| 12 | 5 Single-curvature FLS model Figure 3 – FLS element with curvature and changeof measurement field contour due to curvature |
| 14 | 6 FLS light emission directionality Figure 4 – Curved FLS with convex and concave curvatures |
| 15 | Figure 5 – Radiation pattern of FLSs with nearly Lambertian luminous intensities(n = 0,8, 1, 1,2) and collimated light intensities (n = 5, 10, 15)in a spherical coordinate system Figure 6 – Radiation pattern profiles of FLSs with nearlyLambertian luminous intensities (n = 0,8, 1, 1,2) |
| 16 | 7 Measurement field projection on a curved FLS Figure 7 – Confined flux in solid angles (θ = 0° to 90°) for intensity distributions with n = 0,8, 1, 1,2 and 15 Figure 8 – LMD’s cone cross section nearly equalto that of the FLS’s diameter |
| 17 | Figure 9 – Contour of projected measurement field’s conecross section on a cylindrical FLS Figure 10 – Contour of a cone’s cross section of the measurement fieldon a large radius cylindrical FLS RFLS = = ∞ (flat) Figure 11 – Off-axis measurement and cone’s cross section contouron the DUT (right half expanded and left half contracted) |
| 18 | Figure 12 – Measurement field cone’s cross section contour on a cylindrical FLS versus the angle between the LMD and DUT axes (δ) Figure 13 – Cross section of the measurement field (cone’s cross section) with the angle (δ) between the LMD and DUT axes, on a concave cylindrical FLS |
| 19 | 8 Discussion and conclusions |
| 20 | Bibliography |
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BSI PD IEC TR 62595-1-3:2019
Display lighting unit – Lighting units with arbitrary shapes Published By Publication Date Number of…
