Modern lighting systems which put human needs in the foreground. Daniel Föger

Size: px

Start display at page:

Download "Modern lighting systems which put human needs in the foreground. Daniel Föger"

Julianna Lee
6 years ago
Views:

1 Modern lighting systems which put human needs in the foreground Daniel Föger

2 Outline 1. Introduction 2. New lighting concept 3. Implementation in research projects 4. Conclusion

3 Demographic change UNO-Report 2012 Prognosis 2050

4 Residental electricity consumption EU-27 Source: JRC (2009)

spectral lenticular transmission BIOLOGICAL Lighting needs Elderly people (65 +)

5 Needs of elderly people 25 years 45 years 60 years 85 years 25 years 45 years 60 years 85 years Brightness perception Color perception Increased glare sensitivity Modified spectral lenticular transmission BIOLOGICAL Lighting needs Elderly people (65 +) Perceptionpsychology Reduced pupil size Reduced lenticular transmission VISUAL Lighting needs

6 Needs of elderly people Brabyn JA, Schneck ME, Haegerstrom-Portnoy G., and Lott L. The Smith-Kettlewell Institute (SKI). Longitudinal Study of Vision Function and Its Impact Among the Elderly: An Overview, Optom Vis Sci.2001; 78(5):

7 As it is - lighting in dwellings General issues Diffuse light Low brightness Dark corridors Inhomogeneous illuminance dark surfaces Low Illuminance of the working area < 250lx

8 New lighting for fulfilling human lighting needs in (smart) domestic appliances

9 New lighting concept 1. Split into ambient light zonally task light 2. Control curve adjusted to individual circadian rhythm 3. Automated switching due to presence (PIR sensors) 4. Manually overriding by customer lx

10 Light concept for elderly people Higher light demand (intensity) => task area up to 3000lx, general lighting 300lx Higher glare sensitivity => non-glaring luminaires for task areas Higher brightness homogeneity => uniform ambient lighting through indirect ceiling lighting Individual time-dependent variation of light intensity and light colour => clear day/night signals: 4000K / 2200K and intensity variations

11 Implementation in research projects

12 Ambient Light Guiding System for the Mobility Support of Elderly People (Guiding Light)

13 System architecture (wireless) Guiding Light

14 Demo cases in Guiding Light Project 11 households (and control group of 8)

15 Privat houses primitive state

16 Privat houses with Guiding Light

17 Results - survey Better (dynamic, glare free) light in homes contributes significantly to the subjective feeling of well-being and quality of life. Light is a subtle, in the background acting factor, which is overlaid by a variety of short-term, acute factors (e.g. disease, stroke of fate, conflicts, worries) -> Selected findings on the following slide

18 Selected findings Automatic light in windowless rooms (bathroom, corridor) is expressly desired (residential area problematic) Biologically effective light at constant energy costs (compared to the primary situation) 2200K ( extreme warm white ) perceived as pleasant and accepted Zonal task lighting : high intensities preferred

daytime Power of 60W Decentralized architecture (No Cloud, No Gateway)

20 Adaptive CCT-Curves (2200K-4000K) and LUX-Levels (0-4000lx) producing individual day-night signals PIR-Sensor sustains visual needs during daytime Power of 60W Decentralized architecture (No Cloud, No Gateway) with Enocean switch Open Source Solution written on Python PI)

21 MARS-Test Contrast-Sensitivity horizontal without shading horizontal with shading vertikal without shading Goal: Measuremtent of the visual absolut threshold

22 Laboratory study RDB-Version COB-Version Standard-Version Horizontal Illuminance Levels RDB COB Standard 4050 lx 120 lx bzw lx 120 lx

23 Test-Mockup

Results Summary 1,75 1,70 1,65 alle Senioren (N=17)

1,05 1,00 0,95 Mittelwert Mittelwert±Stdf.

24 Results Summary 1,75 1,70 1,65 alle Senioren (N=17) deskriptive Analyse normal log. Kontrastempfindlichkeit 1,60 1,55 1,50 1,45 1,40 1,35 1,30 1,25 1,20 1,15-0,14-0,22-0,20 mittel schwer 1,10 1,05 1,00 0,95 Mittelwert Mittelwert±Stdf. Mittelwert±1,96*Stdf. COB 120 lx COB 4050lx COB 4050lx mit Versch. RDB 4050lx mit Versch.

25 Summary of findings: Percieved Brightness: Glare free lighting systems allow very high brightness levels (here up to 4000lx) on task areas. The high illuminance level can compensate negative effects from age-related loss of vision slightly. Shading: Elderly people try to improve their vision by reducing the typical visualdistance. Shadows therefore are produced on the task area. These shadows have a strong negative influence into the contrast sensitivity. The creation of shadows and especially multiple-shadows has to be avoided. Shadows are having a stronger effect on the visual performance than typical glare effects. Glare: Diffuse emitting lighting systems with very high luminance levels reduce the visual performance and have to be avoided.

26 Thank you for your attention. Daniel Föger, MSc

3 Laboratory measurement of the illuminance level at the eye

3 Laboratory measurement of the illuminance level at the eye Lux junior 2011 23. bis 25.9.11 Dörnfeld Light and Health in Factory Work Places Bieske, K., Vandahl, C., Wolf, S., Schierz, Ch. TU Ilmenau, FG Lichttechnik, Ilmenau, Germany cornelia.vandahl@tu-ilmenau.de