Luminaire and Lighting Design with Small Diffuse Area Sources
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1 DOE SSL R&D Workshop Long Beach, CA, Jan 29, 2013 Luminaire and Lighting Design with Small Diffuse Area Sources Pane l: Pathways to Deeper Energy Savings and Broader Market Adoption Mike Lu, Director OLDC OLED Lighting Design Center, Berkeley, CA
2 overview why area light sources deeper energy savings application efficiency, light utilization broader market adoption enhancing the perceived value of lighting humanizing luminaire design technical outlook
3 diffuse, area sources the past calm, non-glary diffuse, area sources
4 variety of flat panel light sources edge-lit LED thin film EL OLED microplasma 10m m dispersed micro-led Cf: Jeannine Fisher and Mike Lu, a guided tour of SSL area light sources past, present and future, LFI 2012
5 overview why area light sources deeper energy savings application efficiency, light utilization broader market adoption enhancing the perceived value of lighting humanizing luminaire design technical outlook
6 small packages of light placed according to furniture layout 370 lm
7 application efficiency sample office Total 31,920 lumens Task Area: Desk Space 50 fc x 486 sf: 24,300 lumens Non-Task Area: Rest of Cubicle 10 fc x 410 sf: 4,100 lumens 40 Circulation Area: Hallway 5 fc x 704 sf: 3,520 lumens Based on American National Standard Practice for Office Lighting (ANSI/IESNA RP-1-04)
8 application efficiency lighting calculations 2x4 fluorescent troffer Recessed, 8 x 10 on center Cluster of OLED panels Variable Placement Density
9 application efficiency comparison Lighting System Type Layout Description LPD (W/sf) Excessive Non-task Excessive Circulation Application Efficiency 2x4 fluorescent lensed troffer 2x4 fluorescent parabolic troffer 2x4 fluorescent advanced troffer Linear fluorescent indirect/ direct 2x4 LED advanced troffer Fluorescent low ambient/led task Recessed, 8 x10 on center Recessed, 8 x10 on center Recessed, 8 x10 on center Pendant, continuous rows, 12 on center Recessed, 8 x10 on center Recessed, 8 x10 on center X 8X 28% X 8X 28% X 8X 31% X 6X 27% X 8X 35% X 5X 36-44% Surface mounted to ceiling in patterns that reflect task locations 0.47 (100 lm/w panels) 0.78 (60 lm/w panels) 4X 3X 52% Application efficiency improved by 18-93% over existing lighting systems.
10 light utilization designed to be mounted in close proximity, it transforms the interaction within an interior space to a more human and personal experience to first order, illuminance 1/(luminaire working plane distance) a, 1 < a <2 sizable increase in light utilization when luminaire is deployed closer to the user Kindred
11 overview why area light sources deeper energy savings application efficiency, light utilization broader market adoption enhancing the perceived value of lighting humanizing luminaire design technical outlook
12 lighting and its perceived value luminaires that people pay attention to unique and innovative designs closer to the user interactive controls Zumtobel booth Light+Building 12 great lighting, but where are the fixtures? does greater awareness equal greater perceived value? Hug Light
13 modularity design freedom Trilia
14 new metrics for design density of panels (3000 cd/m 2 example) application efficiency 48 TRI sections Ambient avg: 50 fc Max / Min: 2.1:1 LPD: 1.05 W/ft 2 # of 4 sq: 0.72 panels/ft 2 50 TRI sections Ambient avg: 53 fc Max / Min: 2.6:1 LPD: 1.10 W/ft 2 # of 4 sq: 0.75 panels/ft 2 32 TRI + 22 STRAIGHT sections Ambient avg: 43 fc Max / Min: 4.9:1 LPD: 0.86 W/ft 2 # of 4 sq: 0.59 panels/ft 2
15 a flexible, luminous surface made of small area sources
16 human interaction gestural control Link to full video
17 overview why area light sources deeper energy savings application efficiency, light utilization broader market adoption enhancing the perceived value of lighting humanizing luminaire design technical outlook
18 scaling in edge-lit LED and OLED panels Edge-lit LED OLED Luminance Scaling factor: S Size reduction by factor of S Total lumens (for 1- sided panel) by S 2 LED count (to maintain width of transition region) by S or less Light guide area by S 2 Total cost by between S and S 2 Cost per lumen or area Luminance Total lumens by S 2 OLED failure rate (during manufacturing) by S OLED panel yield Total cost by over S 2 Cost per lumen or area
19 areas of improvement OLED Blue/white life time outcoupling cost edge-lit LED visual quality form factor narrow-width, low to mid power, lighting quality LEDs
20 this is only the beginning thank you for more information Kindred images John Sutton Photography 2011 Trilia images John Sutton Photography 2012
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