Color Science and Photometry for Lighting with LEDs and Semiconductor Nanocrystals (eBook)

Dr. Talha Erdem completed his PhD at Bilkent University and is currently a postdoctoral fellow under the prestigious Newton International Fellowship at the Cavendish National Laboratory of the University of Cambridge, UK. His research focuses on DNA-driven self-assembly of colloidal nanocrystals and controlling the optical features of the self-assembled superlattices in real-time, and their applications to lighting displays. Dr. Hilmi Volkan Demir is a Professor of Electrical Engineering, Physics and Materials Science. He is a Singapore NRF Fellow at NTU Singapore and is the Founding Director of LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays. Concurrently, he holds a chair professorship in materials science and nanotechnology at Bilkent University UNAM – National Nanotechnology Research Center of Turkey. His current research interests include the science and technology of nanocrystal optoelectronics for semiconductor lighting; excitonics and plasmonics for high-efficiency light generation and harvesting; and wireless in vivo sensing and smart implants for future healthcare.

Contents 6
1 Introduction 8
References 9
2 Light Stimulus and Human Eye 11
2.1 Human Eye 12
References 15
3 Colorimetry for LED Lighting 16
References 21
4 Metrics for Light Source Design 22
4.1 Cool Versus Warm White Light: Correlated Color Temperature (CCT) 22
4.2 Color Rendition: Color Rendering Index (CRI), Color Quality Scale (CQS), and Other Metrics 23
4.3 Photometry: Stimulus Useful for the Human Eye 29
References 31
5 Common White Light Sources 32
5.1 The Sun 32
5.2 Traditional Light Sources 33
5.3 White LEDs 35
5.3.1 Multi-chip Approach 36
5.3.2 Color Conversion Approach 37
5.3.3 Broadband Versus Digital Color Lighting 37
References 39
6 How to Design Quality Light Sources With Discrete Color Components 40
6.1 Advanced Design Requirements for Indoor Lighting 40
6.2 Advanced Design Requirements for Outdoor Lighting 44
6.3 Advanced Design Requirements for Display Backlighting 45
References 48
7 Future Outlook 49
References 50
Appendix A Tables of Colorimetric and Photometric Data 52
Appendix B Matlab Codes for Colorimetric and Photometric Calculations 70