![Page 1: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/1.jpg)
NRDC TV Energy Efficiency Research
TV International Stakeholder Meeting San Francisco, California
June 28, 2005
Peter Ostendorp
Research Analyst
Ecos Consulting
(970)259-6801 ext. 307
![Page 2: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/2.jpg)
Little information on TV power use
![Page 3: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/3.jpg)
What test methods are available?
Measures black and white CRTs
Measures color CRTs
Measures new display types
Reflects real world power consumption
DOE method �
JEITA method � �
IEC 62087 � � �
![Page 4: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/4.jpg)
Our Field Test Method
• Measured TV power use in retail setting with WattsUp? Pro power meter
• Used showroom screen settings
• Measured average power over 2 minutes using standard test clip
• Digital Video Essentials video clip used as reference material
![Page 5: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/5.jpg)
Power Consumption in Direct View and Projection TVs (NRDC/Ecos)
0
50
100
150
200
250
300
350
400
450
500
0 500 1000 1500 2000
Act
ive
Mo
de
Po
wer
(w
atts
)
Plasma Projection LCD CRT
Screen Area (square inches)
![Page 6: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/6.jpg)
0
50
100
150
200
250
300
350
400
450
500
0 500 1000 1500 2000
Act
ive
Mo
de
Po
wer
(w
atts
)
LCD CRT
Power Consumption in Direct View and Projection TVs (NRDC/Ecos and AGO)
Screen Area (square inches)
Plasma Projection
![Page 7: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/7.jpg)
How do we fairly gauge efficiency in TVs?
Lumens/watt kWh/year
watts ? in2
![Page 8: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/8.jpg)
Different Trends for Different Technologies
Power Consumption Trends in Direct View and Projection TVs
0
50
100
150
200
250
300
350
400
450
500
0 500 1000 1500 2000
Act
ive
Mo
de
Po
wer
(w
atts
)
Screen Area (square inches)
Direct View
Projection
0.35 watts per square inch
0.15 watts per square inch
![Page 9: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/9.jpg)
Room for efficiency improvements in all technologies
0.0
0.1
0.2
0.3
0.4
0.5
0.6
CRT LCD PDP
Eff
icie
ncy
(w
atts
/sq
uar
e in
ch)
Australia results (n=104)
Projection
NRDC/Ecos results (n=25)
![Page 10: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/10.jpg)
Future technologies provide hope of increased efficiency
Screen size (inches) 0 10 20 30 40
Ave
rage
Pow
er C
onsu
mpt
ion
(wat
ts)
1
10
100
1000
CRT
LCD
Color FED
Itoh S and Tanaka M. “Current Status of Field Emission Displays.” Proceedings of the IEEE. Vol. 90, No. 4. April 2002.
![Page 11: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/11.jpg)
Energy Use of TVs and Home Appliances
TVs Appliances 700
600
500
400
300
200
100
0
Active Mode
Standby Mode
An
nu
al E
ner
gy
Use
(kW
h)
< 30" Direct 30 - 40" > 40" Direct Projection Washing Dishw asher Refrigerator, View TV Direct View View TV TV machine 22.5 cu ft.
TV
![Page 12: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/12.jpg)
What have we learned?
• TV models of given size can vary widely in power consumption while providing similar resolution picture even for models of the same screen technology
• Direct view display technologies follow a similar efficiency trend; no one technology today stands out as efficient or inefficient
• Projection display technologies follow a separate efficiency trend due to fixed power consumption of projection bulbs
• Wide spread in efficiency means opportunity to encourage most efficient models
• Demand for an active mode test method
![Page 13: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/13.jpg)
Power use can vary significantly based on image displayed
0
10
20 30
40
50
60 70
80
90
0 20 40 60 80 100 120
Power Consumption in 24" CRT TV
Elapsed Time (seconds)
Act
ive
Mo
de
Po
wer
(wat
ts)
Bright image
Dark image
![Page 14: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/14.jpg)
Bright showroom settings affect power consumption in many TVs
Effect of Screen Settings on TV Power Consumption
0 100 200 300 400
32" LCD
50" PDP
Average Power Consumption (watts)
Factory default screen settings
DVE calibrated screen settings
32" CRT
27" CRT
32" CRT
![Page 15: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/15.jpg)
Screen settings can even affect new LCD TVs with backlight controls
0 25 50 75 100 125 150 175
100% backlight brightness
brightness
0% backlight brightness
LCD Backlight Settings and Power Consumption
23" LCD TV
32" LCD TV
Average Active Mode Power (watts)
50% backlight
~ 14% range in power use observed
![Page 16: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/16.jpg)
How to feed the signal?
![Page 17: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/17.jpg)
Resolution of test signal can matter
0 10 20 30 40 50 60 70 80 90 100
S-video
RCA connectors
broadcast
Resolution of Test Signal and Average Power Consumption
DTV over-air
Component 480i
Component 480p
Component 720p
Active Mode Power Consumption (watts)
5% - 10% increase in power consumption using digital signals
![Page 18: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/18.jpg)
What is a good TV test method?
• Easy to Conduct
– A trained technician should be able to quickly and easily perform the test
• Reproducible
– Test setup should be clear enough that results do not vary with lab or technician
• Robust
– Can measure all types of TVs, regardless of display technology (CRT, LCD, PDP, etc.)
– No significant changes in test procedure would be required for future technologies
• Representative
– Should indicate real world power consumption of TV
![Page 19: Ecos Presentation on NRDC TV Energy Efficiency Research](https://reader031.vdocuments.net/reader031/viewer/2022020705/61fb911a2e268c58cd5fb3d1/html5/thumbnails/19.jpg)
Questions?
Peter Ostendorp
Research Analyst
Ecos Consulting
(970)259-6801 ext. 307