LED applications in street and interior lighting. Bryan Yang Application Design Center Asia 9 th Apr. 2010

Transcription

1 LED applications in street and interior lighting Bryan Yang Application Design Center Asia 9 th Apr. 2010

2 Content LED applications in street lighting China Street Lighting Current Status Chinese street lighting standards Key Benefits of LED in Street Lighting Technical solutions Reference project LED applications in interior lighting SSL Interior Applications Basic Illumination Requirements Samples of SSL interior light OLED applications in SSL LED Technology Page 2

3 Content LED applications in street lighting LED Technology Page 3

4 China Street Lighting Current Status China -- number of street lamps in million units Street lighting -- light source in percentage HPS CFL Mercury Vapour Incandescent Others Street lighting facility annual growth rate is about 15%-20%. Street lighting administrations under electricity and maintenance cost pressure. Since 2004, energy saving light source has been increasing by over 30% per year. In 2005, LED has been officially included in the energy saving light source by the government. In the 11 th 5-Year Plan( ), the green lighting targets: -- 5% annual energy saving in urban illumination -- minimum 80% system efficiency for 85% of the fixture (normally HPS fixture have 70% system efficiency) -- minimum 85% adoption rate for high efficiency, long lifetime light source and 30% subsidy from the government Street light -- Light source in million pcs LED Technology Page 4 HPS CFL Mercury Vapour Incandescent

5 Chinese Street Lighting Standards CJJ Requirements of Luminance and Illuminance Lighting Class L av in cd/m 2 Maintained value Luminance Illuminance TI (%) SR U 0 L min /L av U L L min /L max Most useful values! E av in lx Maintained value U 0 E min /E av 1 express way, major road, downtown business road 2 collector road 3 local road 1.5/ / / / / / Average illuminance E av : Horizontal illuminance averaged over a road area. Overall uniformity U 0 (of road surface luminance, illuminance): Ratio of the lowest to the average value. Longitudinal uniformity U L : Ratio of the lowest to the highest road surface luminance of the driving lanes. Threshold increment TI: Measure of the loss of visibility caused by the disability glare of the luminaires of a road lighting installation. Surround ratio SR: Average illuminance of strips just outside the edges of the carriageway in proportion to the average illuminance on strips just inside the edges. LED Technology Page 5

6 Key Benefits of LED in Street Lighting Benefits LED Advantages 1 Save energy High luminaire efficacy 2 Reduce maintenance costs Long lifetime 3 Environment friendly No hazardous materials No insect pollution 4 Eliminate light pollution Integrated optics 5 Increase traffic safety Higher mesopic efficacy (high S/P ratio) White light with high CRI Higher uniformity on road LED Technology Page 6

7 Benefit 1: Save energy LED MH HPS Efficency of light sources 80~100 lm/w 80~100 lm/w 100~110 lm/w Power selection 20~160W 150W,250W,400W 150W,250W,400W Power efficiency 90% 75% 75% Luminaire efficiency 90% 70% 70% Thermal factor Luminaire Efficacy 55~69 lm/w 42~53 lm/w 53~63 lm/w Mesopic factor 1.1 ~ ~ ~0.95 Application factor End efficacy 45~60 lm/w 25~35 lm/w 20~30 lm/w Energy cost savings due to high efficiency on system level. For some collector road, replace 250W HPS lamp with lower power (100w-150w) LED lamps could result in obvious energy saving and meet the standards at same time. LED Technology Page 7

8 Benefit 2: Reduce maintenance costs lifetime ( 70% initial flux) LED MH HPS 30000~50000h 6~10 years 8000~15000h 2~3 years 15000~20000h 3~4 years EUR HPS LED LED Technology Page 8

9 Benefit 3: Environment friendly No hazardous materials (Hg free) No UV spectrum, no insect pollution energy-saving and emission-reduction LED Technology Page 9

10 Benefit 4: Eliminate light pollution Directed light, less light pollution due to control of lit area LED Technology Page 10

11 Benefit 5: Increase traffic safety LED MH HPS CCT 4000K~6500K 4000K~6000K 2100K CRI S/P ratio 1.5~ ~ Typ. Uo on road 0.6~ ~ ~0.4 Streetlighting applications operate in the Mesopic region. Higher response to bluer wavelengths may lead to seeing better (quicker response times) with LED sources vs. HPS. According to recent research of visual performance under mesopic light levels, the lamp with more blue light (higher CCT) will be a benefit for peripheral detection and visibility in street lighting application. Higher CCT (5000k~6500k), high CRI (70~80) and high uniformity can make an area appear safer and more secure, which may assist in reducing crime and accidents without increasing light levels. LED Technology Page 11

12 Photopic, Scotopic and Mesopic Photopic: The lower limit at least several cd/m 2 (only Cones active) Scotopic: less than some hundredths of cd/m 2 (only Rods active) Mesopic: 0.001~10 cd/m 2, or ~ 3 cd/m 2 (both Cones and Rods active) Most of exterior lighting application was under mesopic light level Road lighting; Emergency lighting; Aircraft cockpit lighting Air traffic signalling and control; Some military and medical application Signalling night vision systems and displays LED Technology Page 12

13 ASSIST recommend on Mesopic in outdoor lighting OSRAM suggest highest efficient LEDs around 5500K for street lighting with a S/P ratio about 2.0, which will have high mesopic efficiency. LED Technology Page 13

14 LED street light freedom of design LED Technology Page 14

15 Technical solution Mechanical design LED Technology Page 15

16 Technical solution Thermal management LED Technology Page 16

17 Technical solution Optical design LED Technology Page 17

18 Technical solution Electrical/driver design LED Technology Page 18

19 Technical solution Optical/Thermal simulation LED Technology Page 19

20 Technical solution Prototype and test LED Technology Page 20

21 Reference project - 108W LED Lamps LED Technology Page 21

22 Measurement Results Illuminance measurement E av (lx) E min (lx) E max (lx) Uo E min /E max LED Technology Page 22

23 Difference between Simulation and Measurement Simulated value Measured value LED Technology Page 23 E av (lx) E min (lx) E max (lx) U o E min /E max Difference 8% 14% 4% 2% 9%

24 Comparing Lighting Quality of LED and HPS Lamps Street lighting with 108W LED lamps Street lighting with 250W HPS lamps E av =21.6lx, U o =0.81, TI=7, LDP=0.61 w/m 2 E av =33lx, U o =0.45, TI=9,LDP=1.26 w/m 2 LED Technology Page 24

25 Comparing Lighting Quality of LED and HPS Lamps Good visibility with white LED lamp Green trees under LED lamp with high CRI HPS lamp cause much glare Higher E av, but low visibility LED Technology Page 25

26 Project photo of GD oval plus in street Guangzhou LED Technology Page 26

27 OSLON solution for street light LED Technology Page 27

28 OSLON solution for street light LED Technology Page 28

29 Project photo of street lighting LED Technology Page 29

30 Content LED applications in interior lighting LED Technology Page 30

31 SSL Interior Applications Residential illumination Office illumination Plant illumination Commercial illumination Shop illumination Supermarket illumination Train/Metro station illumination Train/Metro/Bus illumination Airplane illumination Garage illumination Table lamp Torch Advertising light box LED Technology Page 31

32 Basic Illumination Requirements Function Comfort Illumination level uniformity Light color Glare limiting CRI Shadiness Light accents LED Technology Page 32

33 Luminaire Efficiency Of Lighting System Conventional lamp system LED system Losses due to low reflectivity Losses due to shadowing by lamp itself Rays missing the reflector Losses due to reflector absorption No reflector losses because light is emitted only into one half space Advantage Factor LED > 1.3 For Optical Efficiency, only compare Optical Systems!! LED Technology Page 33

34 Comparison Of Main Features LED Incandescent CFL CCT CRI Environment friendly RoHS Hazardous materials (Hg) Dimmable Yes Yes Yes but difficult Lifetime (70% initial flux) LED Technology Page 34

35 Samples of SSL interior light LED Technology Page 35

36 Samples of SSL interior light LED Technology Page 36

37 Samples of SSL interior light LED Technology Page 37

38 MR 16 OSLON SSL Without secondary lens High reflectivity, less light loss Very uniform illuminance and color LED Technology Page 38

39 Downlight OSLON SSL Perfect illumination angle None glaring Very uniform illuminance LED Technology Page 39

40 LED Bulb OSLON SSL Without secondary optics Extra bright Very uniform illuminance LED Technology Page 40

41 Panel Light/T8/Down Light OSLON SSL LED Technology Page 41

42 OSRAM LED SSL Applications APT/ APT+ OSTAR SMT GD / GD+ OSLON MR 16 Spot Light LED bulb LED Technology Page 42

43 Content OLED applications in SSL LED Technology Page 43

44 OLED in SSL applications LED Technology Page 44

45 OLED in SSL applications LED Technology Page 45

46 OLED in SSL applications LED Technology Page 46

47 OLED in SSL applications LED Technology Page 47

48 OLED in SSL applications LED Technology Page 48

49 OLED Roadmap to the Light of the Future General lighting Transparent room separators Flexible OLED Lighting wallpaper and light curtains Diffuse ceiling lighting Decorative illumination Automotive interior lighting Self illuminating traffic signs Advertisement Emergency and other signs LED Technology Page

50 LED Technology Page 50 Thank you for your attention