Using Using Understanding the possibilities and complexities of printing in color.
Light, Color and Improved Color Quality Possibilities with LED
-
Upload
cindy-foster-warthen -
Category
Technology
-
view
238 -
download
5
Transcript of Light, Color and Improved Color Quality Possibilities with LED
![Page 1: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/1.jpg)
![Page 2: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/2.jpg)
Presenter: Eric Haugaard, Cree LED Lighting
![Page 3: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/3.jpg)
Credit(s) earned on completion of this course will be
reported to AIA CES for AIA members. Certificates of
Completion for both AIA members and non-AIA
members are available upon request.
This course is registered with AIA CES for
continuing professional education. As such, it does
not include content that may be deemed or
construed to be an approval or endorsement by the
AIA of any material of construction or any method or
manner of
handling, using, distributing, or dealing in any
material or product.
___________________________________________
Questions related to specific materials, methods, and services will
be addressed at the conclusion of this presentation.
![Page 4: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/4.jpg)
Through the ongoing advancements of LED technology, the
possibility to provide improved color quality performance and
value to the application space has never been greater. This
presentation will address the aspects of color science and the
various light source technologies used for general illumination,
with a strong focus on Light Emitting Diodes (LEDs). Included
will be a review of the most widely adopted methods and
metrics for describing all aspects of color quality and
performance for general illumination solutions. Examples
illustrating the current and future possibilities for accurately
predicting color quality performance and value in the general
illumination space will be discussed.
![Page 5: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/5.jpg)
1. Exploring Light in Nature vs Man Made Light.
2. Light Source Science – LED and Traditional Technologies, A look
into the Future With LED
3. Understanding Object Color and the Importance of Broad Spectrum
Sources.
4. Challenges in Quantifying Color Quality
5. Meeting Color Quality Expectations in the Application Space
![Page 6: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/6.jpg)
Light – What is it made of?
Light is made of waves (technically: electromagnetic waves of radiant energy)
very small waves…
Lights wavelength is measured in
billionths of a meter, nanometer (nm)
UV, Infrared (IR) heat, cell phone radio
waves, X-rays are the same waves…
just longer or shorter
Visible Light is wavelengths between
380nm and 780nm
![Page 7: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/7.jpg)
• Different Wavelengths = Different Colors Light comes in different colors, spread across the rainbow of hues we
call the visible spectrum.
Red waves are the longest, purple the shortest
![Page 8: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/8.jpg)
8
Blue Green Red
Visible Light
![Page 9: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/9.jpg)
How Do Humans “See” Color?
• The eye contains cones and rods - cones are color sensitive and used for high light level vision (photopic) , rods are for night vision (scotopic)
• Three types of cones – long, medium and short .. Sensitive to red, green and blue areas of the visual spectrum
• Cones are concentrated in high density in fovea, Rods are spread across a much larger area inside the eye
![Page 10: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/10.jpg)
Sunlight
Twilight
Starlight
![Page 11: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/11.jpg)
Color Intensity Perception
White light consists of many colors
mixed together
Natural White Light (such as
sunlight) consists of a continuous
spectrum of all colors
Wavelength
Power
Relative Human Eye Sensitivity
![Page 12: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/12.jpg)
The Human Eye Response Curve
555 nm Peak
![Page 13: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/13.jpg)
13 1931 CIE Chromaticity Diagram
1976 CIE Chromaticity Diagram
How It Works
• Monochromatic (“high Saturation”) colors are on the outside edge of the diagram
“The Spectral Locus”
• All combinations of colors are on the inside, with white colors in the middle
![Page 14: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/14.jpg)
14 1931 CIE Chromaticity Diagram
Red
Green
Blue
![Page 15: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/15.jpg)
![Page 16: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/16.jpg)
16
![Page 17: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/17.jpg)
Steel @ 1500K Warm White
B type star >11,000K Cool White
Noon time sun @ ~ 6000K Cool White
Blackbody Radiation
Tungsten @ 2700K Warm White
1931 CIE Chromaticity Diagram
![Page 18: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/18.jpg)
Color Gamut
![Page 19: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/19.jpg)
19
Blue + Yellow Phosphor
Blue Peak
Yellow Phosphor
![Page 20: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/20.jpg)
CIE 1931 Color Space
![Page 21: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/21.jpg)
CIE 1931 Color Space
![Page 22: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/22.jpg)
White Light for General Illumination
Creating White Light
WHITE LIGHT
![Page 23: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/23.jpg)
LIGHT EMITTING DIODE
Epitaxial Layer
Substrate
![Page 24: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/24.jpg)
LIGHT EMITTING DIODE
![Page 25: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/25.jpg)
LED Package
![Page 26: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/26.jpg)
Blue + Phosphor Generating White Light with LEDs
Phosphor
Blue LED
![Page 27: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/27.jpg)
Spectral Power Distribution
Daylight Incandescent
Phosphor Converted LEDs
![Page 28: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/28.jpg)
Spectral Power Distribution Phosphor Converted LEDs
Metal Halide Fluorescent
![Page 29: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/29.jpg)
Phosphor Converted LEDs
![Page 30: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/30.jpg)
Precise Color Tuning
![Page 31: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/31.jpg)
31 Precise Color Tuning
![Page 32: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/32.jpg)
32
• Even with the two source method choices abound
• Here is a system that starts and ends on the BBC
6500K
2700K
2700 Tc(K)
6500
Two Source White Color Tuning
Credit: Finelite, Inc.
![Page 33: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/33.jpg)
33
• Here is a system that starts above the Black Body Curve and ends
below it
6500K
2700K
2700 Tc(K)
6500
Two Source White Color Tuning
Credit: Finelite, Inc.
![Page 34: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/34.jpg)
34
• Customer acceptance will determine which two source White Color
Systems provides the best value
6500K
2700K
2700 Tc(K)
6500
Two Source White Color Tuning
Credit: Finelite, Inc.
![Page 35: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/35.jpg)
Comparing Spectral Power Distribution
Incan-descent
Daylight
3000 K 3000 K
![Page 36: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/36.jpg)
Color Rendering
![Page 37: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/37.jpg)
Color Rendering Index (CRI) – A quantitative measure of the ability of a light source to reproduce
the colors of various objects faithfully in comparison with an ideal or natural light source
– Ranges from 0 (poor) to 100 (excellent)
![Page 38: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/38.jpg)
Object Color
![Page 39: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/39.jpg)
Spectrum
Object Color
Vision
Object Color
![Page 40: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/40.jpg)
Color Rendering Index
Daylight In general terms, CRI (Ra) is a measure of a light source's ability to show object colors "realistically" or "naturally" compared to a familiar reference source, either incandescent light or daylight.
None of the 8 test colors used to calculate CRI are saturated. So, CRI is a poor measure for indicating how well a light source illuminates saturated colors. Even with a high CRI (Ra), color rendering of saturated colors can be poor.
![Page 41: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/41.jpg)
CRI With Expanded Ra
Example
![Page 42: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/42.jpg)
Color Rendering Index – R9
U.S. Department of Energy (DOE) Comments:
0 100 75 50
Poor Good Very good Excellent
![Page 43: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/43.jpg)
Color Like Nature Meant it to Be!
![Page 44: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/44.jpg)
![Page 45: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/45.jpg)
This produce may appear
reasonable under a broader
color spectrum source.
Why is full spectrum color important?
What would you expect to happen
under a Low Pressure Sodium lamp?
Color Contrast
![Page 46: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/46.jpg)
LPS LED
Color Contrast
![Page 47: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/47.jpg)
What’s the Value of
Exceptional Color Quality?
![Page 48: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/48.jpg)
52 Good CRI and Red Color Rendition is Important
For Illustrative Purposes Only
Images: Courtesy GE Lighting
![Page 49: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/49.jpg)
53
For Illustrative Purposes Only
Good CRI and Red Color Rendition is Important
![Page 50: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/50.jpg)
Different Colors…
Should Look Different
Help People
Look Their Best
![Page 51: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/51.jpg)
Tunable Fitting Room Lighting
Photo Credit; Lux Magazine
![Page 52: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/52.jpg)
Published in March 2015 Collaborative paper between CLTC, University of British Columbia and the National Research Council of Canada.
High Color Rendering Can Enable Better Vision
without Requiring More Power
![Page 53: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/53.jpg)
![Page 54: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/54.jpg)
Dim-to-Warm Solutions
EXAMPLE:
• Follows above curve from 2700K to 1800K
• At 1800K, similar color to candle light,
sunset, and sunrise
• High CRI throughout dimming
• Color changes naturally just as an incandescent lamp
![Page 55: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/55.jpg)
Seeing is Believing…
![Page 56: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/56.jpg)
Seeing is Believing…
![Page 57: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/57.jpg)
LED Metal Halide
830W 3,070W
![Page 58: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/58.jpg)
Daylight at Night?
![Page 59: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/59.jpg)
Metal Halide 4000K ~65 CRI
R9 <0
LED 5000K 90+ CRI
R9 50+
![Page 60: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/60.jpg)
64 400W Metal Halide
![Page 61: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/61.jpg)
65 LED Solution
![Page 62: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/62.jpg)
67 “Lighting Class” LED Devices
![Page 63: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/63.jpg)
68 Color Stability
Blue Shift
Green Shift Yellow Shift
![Page 64: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/64.jpg)
69 Long Term Color Point Stability
This is poor color consistency…
Typical Fluorescent and Metal Halide Challenges
Greater Possibilities With LED Solutions
![Page 65: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/65.jpg)
70
![Page 66: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/66.jpg)
71
New Color Rendering Metrics are Being Explored (IESNA TM-30-15)
![Page 67: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/67.jpg)
72
Credit: Royer, US DOE
![Page 68: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/68.jpg)
73
Credit: Royer, US DOE
![Page 69: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/69.jpg)
74
Credit: Royer, US DOE
![Page 70: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/70.jpg)
75
Credit: Royer, US DOE
![Page 71: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/71.jpg)
Presenter: Eric Haugaard, Cree LED Lighting
![Page 72: Light, Color and Improved Color Quality Possibilities with LED](https://reader034.fdocuments.net/reader034/viewer/2022052514/587d292f1a28ab1c2f8b724b/html5/thumbnails/72.jpg)
This concludes The American Institute of Architects
Continuing Education Systems Course