Ferenc SZABÓ, Péter CSUTI

Transcription

1 Ferenc SZABÓ, Péter CSUTI University of Pannonia, Department of Electrical Engineering and Information Systems, Veszprém, Hungary Lux et Color Vesprimiensis 2012 October 29 30

2 Full-scale experimental rooms at University of Pannonia 2 rooms with identical dimensions: simulate kitchen, dining environment simulate living room environment Each room is equipped with 4 reference and 4 LED luminaires Air conditioned

3 Full-scale experimental rooms at University of Pannonia Living room environment Reference lamps: Halogen 3000K CCT LED SPD: 3 SPDs at 2 luminance levels l PC workstation in living room

4 Full-scale experimental rooms at University of Pannonia 1,80E 02 Reference lamps: Solux halogen 4000K CCT LED SPD: 3 SPDs at 2 luminance levels Kitchen, dining room environment e SPD [W/str*m2*nm] absolute 2,00E 02 1,60E 02 1,40E 02 1,20E 02 1,00E 02 8,00E 03 6,00E 03 4,00E 03 2,00E 03 Precise FNV/CG Q50MR16C/CG55 12,0V Precise FNV/CG Q50MR16C/CG55 12,30V 0,002 0,00E ,002 wavelength [nm] e SPD [W/str*m2*nm] absolute 0,004 0,003 0,003 0,001 0,001 Solux 4100K 0, wavelength [nm] Solux 4100K Solux 4100K

5 Full-scale experimental rooms at University of Pannonia Reference lamps: 9 x 50W halogen lamps each, 2 possible CCTs: 3000K and 4000K, Dimming i with voltage control and partitioning. i

6 Full-scale experimental rooms at University of Pannonia LED lamps: 20 independent channels (expandable to 24 channels), 24 LEDs/channel (nominal power: 480W) Controlled by 16 power supplies, each has 24 independent channels Dimming with PAM (Pulse Amplitude Modulation)

7 Luminous intensity distribution and total luminous flux of the 20 channel LED luminaire 57 cm x 57 cm luminaire Labertian luminous intensity distribution. Lamp det. distance = cm distance corr. (k1) = detector constant (k2) = lx/µa Φ v = lm Only three white channels in operation! Electrical power = W Luminous eff. η* = lm/w Diffuser decreases the lum. eff. significantly.

8 Luminous intensity distribution of the 20 channel LED luminaire 1,2 Rel. SPD of three white LED channels 57 cm x 57 cm luminaire Lambertian luminous intensity distribution. relative e SPD / sensitiv vity 1,0 0,8 0,6 0,4 0,2 Lamp det. distance = cm distance corr. (k1) = detector constant (k2) = lx/µa Φv = lm Electrical power = W Luminous eff. η* = lm/w 0, wavelength [nm] Only three white channels in operation! Diffuser decreases the lum. eff. significantly.

9 Relative spectral power distribution as the function of gamma direction Raw SPD at gamma = 0, 30, 60, 75 Max normalized SPD at gamma = 0, 30, 60, 75 1,2 1 0,8 0,6 0,4 0, C0 g0 C0 g30 C0 g60 C0 g C0 g0 C0 g30 C0 g60 C0 g75 All channels are driven at maximum power. Only small deviations in the spectral power distributions can be identified when measured from the given gamma directions.

10 Full-scale experimental rooms at University of Pannonia SPD of lights inthepilot il experiment Three light groups with different duv values (0,+, ). InonegroupthelightshaveincreasingCCTs. 0,45 y Light group A (Δuv = 0) Light group B (Δuv > 0) Light group C (Δuv < 0) AL1 AL2 AL3 AL4 AL5 BL1 BL2 BL3 BL4 CL1 CL2 CL3 CL4 X Y Z x 0,459 0,448 0,436 0,424 0,417 0,471 0,451 0,436 0,415 0,455 0,436 0,429 0,402 y 0,411 0,407 0,404 0,400 0,398 0,428 0,422 0,420 0,417 0,401 0,398 0,396 0,384 TCC 2705,0 2855,9 3004,9 3204,9 3304,9 2676,3 2909,1 3138,6 3500,8 2686,1 2964,3 3075,0 3513,6 Δuv 0, , , , , , , , , , , , , ,40 0,35 0,40 0,45 0,50 x 0duv +duv duv Planckian 0,004 0,0035 0, ,0025 0,002 0,0015 0,001 0,0005 CCT series, Δuv = K 2856 K 3005 K 3205 K 3305 K 0,01 0,009 0,008 0,007 0,006 0,005 0,004 0,003 0,002 0,001 CCT series, Δuv > K 2909 K 3139 K 3501 K 0,009 0,008 0,007 0,006 0,005 0,004 0,003 0,002 0,001 CCT series, Δuv < K 2964 K 3075 K 3514 K

11 First experimental results Observers task 1 Put the lights in the order of their general preference. A AL1 AL2 AL3 AL4 AL5 1st nd rd th th rank IV. II. I. III. V. B BL1 BL2 BL3 BL4 1st nd rd th rank II. I. IV. III. C CL1 CL2 CL3 CL4 1st nd rd th rank III. I. IV. II. Results show that the CCT region 2900 K < CCT < 3000 K is the most preferred.

12 First experimental results Observers task 2 Select the most preferable light based on the given aspects. brightness, warmness, relaxing, alertness, the most positive (+++). A AL 1 AL 2 AL 3 AL 4 AL 5 brightness warmness relaxing alertness B BL 1 BL 2 BL 3 BL 4 brightness warmness relaxing alertness Results show that there is connection between the light s CCT and the following aspects: warmness relaxing, alertness, most positive (+++). No connection between CCT and the following aspects: brightness, warmness. C CL 1 CL 2 CL 3 CL 4 brightness warmness relaxing alertness

13 Thank you for your kind attention! This research was supported by EU FP7 ICT project (grant number: ) entitled Solid State Lighting for Europe szabo.ferenc@virt.uni csuti.peter@virt.uni pannon.hu