All aspects of solid-state lighting with focus on advances in materials and devices, visual and non-visual effects of lighting, smart lighting and intelligent luminaires, as well as implementation and application of color changing or CCT tunable luminaires.

ADVANCEMENTS IN SOLID-STATE-LIGHTING SOURCES

Tuesday, May 24

11:10 am–12:30 pm

Room 131

An overview of the compound-semiconductor-based visible-spectrum LED industry, including applications, performance to date, trajectory, and potential future opportunities along with the technological and materials science barriers to be overcome will be provided.

M. R. Krames
Arkesso LLC, Palo Alto, CA, USA

A flexible OLED display with the capability to show 16-million colors was fabricated on a plastic barrier-film substrate, which can produce arbitrary shapes with arbitrary colors, suitable for artistic expressions. Independently controlled red, green, and blue light-emitting layers were stacked vertically so that no visible structure can be observed even with magnifiers from right-in-front measurement. The device can be used for colored illumination, as well as for OLED pixels for an emission three times that for a conventional pixel design. The device was fabricated on a plastic substrate so that the polychromatic OLED device was manufacturable with a roll-to-roll production line.

T. Tsujimura,
T. Hakii,
T. Nakayama,
H. Ishidai,
T. Kinoshita,
S. Furukawa,
K. Yoshida
Konica Minolta, Inc., Tokyo, Japan

Two approaches for tuning the correlated color temperature (CCT) of a white LED (WLED) with dichroic dyes and cholesteric liquid-crystal films are proposed. The major advantages include simple device configuration, simple driving circuit, low voltage, large CCT tuning range, and low cost. Both devices are promising for next-generation smart-lighting applications.

H. Chen,
R. Zhu,
Y.-H. Lee,
S.-T. Wu
University of Central Florida, Orlando, FL, USA

Hybrid WOLED technology that combines colloidal quantum-dot narrow red emitters with organic emitters for high-efficacy high-color-quality solid-state lighting is proposed. Spectra analysis indicates this approach will lead to WOLEDs that could achieve high color quality (CRI ≥ 91; R9 ≥ 32) at highluminous-efficacy radiation (≥ 359 lm/W).

H. Chen,
J. He,
J. Chen,
S.-T. Wu,
Y. Dong
University of Central Florida, Orlando, FL, USA

CONVERGENCE OF LIGHTING AND DISPLAYS

Tuesday, May 24

2:00pm –3:00pm

Room 131

With the ongoing progress in both areas, the traditional border between lighting and information display will increasingly blur. Recent research results of adapting information-display paradigms for advanced lighting applications, as well as using displays as light sources, will be discussed. Requirements to the underlying display and lighting technology will be described.

M. Bues,
O. Stefani,
A. Pross
Fraunhofer Institute for Industrial Engineering (IAO),Stuttgart, Germany

The ability to control spatial location, distribution, and intensity of light are critical elements in lighting design. A novel luminaire concept, OSRAM OmniPoint Normal, makes use of a software-controlled LED array which adjusts the parameters above through a wireless device, allowing for a flexible and reconfigurable light output.

R. M. Pereyra,
M. A. Quilici,
S.-C. Ryu,
A. R. Sarkisian
OSRAM Corporate Innovation, Beverly, MA, USA

Algorithmically controlled dynamic daylight-quality artificial lighting provides an opportunity to restore occupants' connection to their external environment. LED luminaires can indicate sky conditions in windowless building interiors while providing high-quality ambient illumination. Methods to achieve real-time and idealized emulations of sun and sky light specific to local geo-coordinates and time will be presented.

J. K. Mapel,
A. R. Ellis,
J. Hunsinger
Arborlight, Inc., Ann Arbor, MI, USA

LUMINAIRE AND LIGHTING SYSTEM DESIGN

Tuesday, May 24

3:40pm –5:00 pm

Room 131

Daylight is arguably the gold standard for illumination. It provides a model for dynamic changes in spectrum, intensity, collimation, and imagery that electronic illumination systems may replicate. Examples of real-world and electronically replicated aspects of daylight will be provided. Dynamic-range considerations and tradeoffs will also be discussed.

S. Paolini,
D. Simonian,
L. Dadok
Telelumen LLC, Saratoga, CA, USA

The Smart Conference Room at the NSF Smart Lighting Engineering Research Center, which features a networked system of 5-channel LED fixtures, custom color sensors, time-of-flight sensors, and advanced algorithms to enable real-time privacy-preserving occupancy tracking and energy-efficient feedback control will be described.

R. J. Radke,
T.-K. Woodstock,
M. H. Toufiq Imam,
A. C. Sanderson,
S. Mishra
Rensselaer Polytechnic Institute, Troy, NY, USA

A method was explored to optimize illumination spectra for surgical lighting. The optimized illumination can enhance the color contrast of the target biological tissue and to maintain the high color-rendering index of the light source simultaneously. Results showed that the optimized illumination has a better color contrast than that of conventional surgical light (halogen) and both CIE Ra and R9 values are above 85.

H. Wang
Zhejiang University, Hangzhou, P. R. China and Eindhoven University of Technology, Eindhoven, The Netherlands

R. H. Cuijpers,
I. M. L. C. Vogels,
I. Heynderickx
Eindhoven University of Technology, Eindhoven, The Netherlands

M. R. Luo
Zhejiang University, Hangzhou, P. R. China and University of Leeds, Leeds, U.K.

Z. Zheng
Zhejiang University, Hangzhou, China, P. R.