Shaping light2011 led architexture-picusled-2
Transcript of Shaping light2011 led architexture-picusled-2
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Architecture of LED systems
Fotonica-2011Rob AlferinkMarch 30.
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Shaping Light 2011, PicusLED
Outdoor
Mobile Phone
Automotive
IndoorDisplay
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LED system, typical architecture
Shaping Light 2011, PicusLED
control
driver
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Shaping Light 2011, PicusLED
Interactions
MCPCB
FR4
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Breakdown
Performance-Reliability-flexibility-COSTS
Shaping Light 2011, PicusLED
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Breakdown on deeper level
Shaping Light 2011 ,PicusLED
System engineering on a high level with options to optimize the LED
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Outdoor Lighting fixture
Shaping Light 2011, PicusLED
Tube
LED
Plastic cover
Heat sink Proper lensLEDs for 900 lm
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RGB mixing, another issue
Shaping light 2011, PicusLED
3 color differ in dom wavelength3 colors in xy color space
BBL
Make 3000K
Drift by increase of ambient T
25C
50CAnsi bins
Requiers color measurement and control
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Linear LED source, looks simple
Shaping Light 2011, PicusLED
T junction
T solder
T heatsink
T ambient
Rth -LED
Rth -board
Rth –heat sink
25 C
50 C
SO:For 50 cm12 x 1 W48 x ¼ W
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Linear source , uniformity
Shaping Light 2011,PicusLED
Standard coverDiscrete sources
Diffuser materialLine source
So For 50 cm
12 x 1 W 12 x3=36V
48 x ¼ W 144 V
3 parallel strings of ~ 48 V
Binning issue ?!
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Binning
Shaping light 2011, PicusLED
Flux [lm]-Forward voltage [V]- color CCT or dom. wavelength [x,y]
0.24 V * 16 = 4V
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Architecture of LED systemsAny questions?
Shaping Light 2011, PicusLED