This part of IEC 62595, which is a Technical Report, provides general information for judging the necessity of future standardization of glass light guide plates for display lighting units, which include backlight units for transmissive displays such as LCDs, and frontlight units for reflective displays.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions 3.2 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 4 Overview 4.1 General 4.2 Light guide plate technologies and its typical materials Figures Figure 1 \u2013 Structure of edge-lit BLU and LGP <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.3 Advantages of and issues with GLGP Figure 2 \u2013 Light propagation in an LGP Tables Table 1 \u2013 Comparison between polymers and glasses for LGP <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5 Optical characteristics 5.1 Factors affecting optical characteristics of GLGPs 5.2 Optical absorption of the glass materials for LGPs <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figure 3 \u2013 Examples of internal transmittance spectra at 50 cm in the optical path length Figure 4 \u2013 Chromaticity gradient against the distance from the incident edge <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.3 Optical absorption and scattering loss caused by the dot pattern 5.4 Incident loss <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.5 Effect of the reflection tapes 5.6 Discussions for possible future standardization 5.6.1 Applicability of existing standards Figure 5 \u2013 Variation of the relative BLU luminance against the thickness of the GLGP <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.6.2 Mechanical structure and interface 5.6.3 Hotspot influence caused by LED light source 5.6.4 Non uniformity around the edge 5.6.5 Optical absorption of glass materials for LGPs 6 Mechanical and environmental characteristics 6.1 General <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.2 Rigidity Table 2 \u2013 Physical properties of commercial glass for LGP and PMMA <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 6.3 Thermal expansion and heat resistance\/noninflammability Figure 6 \u2013 Weight\/thickness dependence of the rigidity of PMMA and glass for LGPs Figure 7 \u2013 Schematics of the simulation setup for the deformation calculation of the LGP by pulling up one corner and fixing the other three corners Table 3 \u2013 Comparison of thickness, weight, and calculated deformation between GLGP, PMMA LGP, and PMMA combined with steel plate <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 8 \u2013 Horizontal bowing of polymeric LGPs under elevated temperature <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.4 Humidity absorption Figure 9 \u2013 Simulated temperature distribution of (a) GLGP and (b) PMMA LGP Figure 10 \u2013 Simulated thermal deformation of (a) GLGP and (b) PMMA LGP due to LED lighting <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.5 Impact resistance Figure 11 \u2013 Increase in the horizontal length of LGP with temperature change for a 65\u201d diagonal LGP Table 4 \u2013 Comparison of GLGP and polymer LGP in confined structure under humid condition <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.6 Discussions for possible future standardization 7 Additional functions and possible future standardization 7.1 General 7.2 Local dimming for HDR TV Table 5 \u2013 Impact resistance with different machining <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7.3 Curved GLGP for curved LCD Figure 12 \u2013 Example of curved LCD using a curved GLGP <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 7.4 Quantum dot coating and quantum dot coated film LCD 7.5 Frontlight 7.6 Transparent LCD Figure 13 \u2013 Example of transparent LCD <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 7.7 Combination with PDLC Figure 14 \u2013 Example of transparent LCD with GLGP including PDLC <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Display lighting unit – Glass light guide plate<\/b><\/p>\n |