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ANN: LED Luminossity Breakthrough

Discussion in 'Lighting' started by Peter Lowrie, Nov 15, 2003.

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  1. Peter Lowrie

    Peter Lowrie Guest

    15 November 2003.

    Announcement:

    Light Emitting Diode (LED) Intensification Breakthrough in New Zealand
    laboratory.

    Using ultra-small electronic componentry to intensify (make brighter)the
    ubiquitous LED, the LED output can be increased by up to four times without
    blowing them up as would be expected when you shove too much voltage into
    them. The Free Electron laboratory technicians in Lower Hutt, North Island,
    New Zealand have developed a device to intensify LED's by overpowering and
    cooling LED's to make an otherwise mediocre LED shine furiously bright.

    Given the headlong rush to more Lumens per Watt and the wide range of
    applications that LED's lend themselves to, it is surprising that such
    an add-on component has not, before today, been developed. The LED
    Accelerator brings a solution to bear upon the problem of otherwise poor LED
    luminosity performance. At an increasing rate LED's are being used in
    industry, transport, home and personal lighting, security, communications,
    toys and consumer electronics, the future is bright then, for a company
    that will manufacture and distribute the LED Accelerator.

    In the next few days it is expected that rights to the device will be
    auctioned by eBay and at other auction sites in Europe, and Australasia.

    http://www.geocities.com/ledaccelerator

    This press release was provided by:

    Peter E. Lowrie.
    Chairman,
    Free Electron.
    High St,
    Lower Hutt, 6009.
    New Zealand.
    ++64-4-9766712
     
  2. Er, LEDs are current driven.....
    T1 , T1 3/4, LStar, Spider, SMD what kind of LED exactly?

    How does the LED mount to the device to acheive this cooling?
    Because using any form of active cooling loses any efficency benefits is
    probably why...
    Honestly would like to see good LED products given wider publicity,my living
    depends on it.

    However, obvious snake oil salesmen and kooks should be shunned and exposed
    as speedily and thoroughly as possible.

    Clearly this character belongs in this category, lines such as this expose
    him as a charlatan:

    "The Device interconnects a nominal 9 Volt DC supply to nominal 5 Volt Light
    Emitting Diode Arrays."

    Perhaps he sells previously unknown to physics 5V LED arrays.

    Another `power saving` con.

    Adam
     
  3. [snip]

    Higher intensity is not the same as higher efficacy unless the input
    power remains the same. And, isn't it a bit obvious (and well known)
    that cooling an LED (and just about any other semiconductor device)
    will allow it to be run at higher current? I must be missing
    something.
     
  4. Where is the benefit to overdrive LEDs, if this significantly decreases the
    life expectancy?
    Furthermore, the luminous efficiency will probably also decrease.

    Horst Dieter Schilling
     
  5. Peter Lowrie

    Peter Lowrie Guest

    Time to update information for detractors, supporters and other souls kind
    enough to provide feedback herein:

    The circuit does not change the colour of the LED.

    Most LEDs do not operate at 100% duty - brake lights for example, life
    reduction expectancy therefore UP TO 30%.

    The circuit does not directly influence the efficiency of the LED, it just
    allows a higher voltage to be safely applied to the LED.

    In this incantation the circuit is designed for arrays of LED's, such as
    traffic lights, indicators and tail lights. It's use will be more
    applicable, therefore, to interior lighting, automotive, traffic and
    industrial applications.

    The low power version sinks 1 Amp, and the power device <4 Amps - which is a
    huge output so far as LED applications are involved. At the four Amp rating
    8 devices could easily power aircraft runway lights.

    -------------------------------

    A typo on the website has been fixed.

    Thankyou for suggestions insofar as Lumileds and Luxeon are concerned.

    Do please post on-topic communiques to this NG rather than posting emails as
    is the want in NG culture.

    An announcement will be issued shortly as to auctioning the rights to
    use/manufacture the device.

    Yours faithfully

    Peter E. Lowrie.
    Chairman,
    Free Electron.
    High St,
    Lower Hutt, 6009.
    New Zealand.
    ++64-4-9766712
     
  6. Peter Lowrie

    Peter Lowrie Guest

  7. Always have first coffee of the day before posting is what I have learnt
    from my first post.
    Well there is no way of driving more current through LED X, any LED,
    without either cooling it further or providing extra heatsinking like
    Luxeon Star and `spider` 4 legged flat LED packaging or thermo electric
    cooling,peltier, heat pipe,water, fluoinert or plain `sink and old fan
    OR
    Pulsing the LED with higher current for limited periods to keep junction
    temperature Tj within acceptable limits.This is fine for photo detectors
    that can see very short bright flashes, living creatures vision averages
    the flashes into a less than full brightness flicker or constant light
    depending on pulse width and frequency.

    White LEDs change colour a lot when overdiven with the above conditions
    missing, even with above conditions present lifetime will probably go down
    a lot, lumen depreciation and colour shift rather than outright Dark
    Emmitting Diode.
    Other colours shift as well, blue goes a lovely cyan before turning into a
    DED.
    You can cook any LED to an extent, take it to the limit of coulour shift or
    so , or keep it cool and go way over manufacturers ratings. Which are of
    course 100K hours, your reckoning UP TO 70K hours , about 8 Years. If the
    punter still has the receipt and your still about...

    Upto 30% if used itermittently in brake lights for example, many drivers
    lean on the brakes for long periods while staionery, you`ve got, at a guess
    50mA going through a 20mA LED at high duty rate pulse for possibly extended
    periods . It might be up to 70K hours or it could be sub 10K hours.
    You are claiming higher luminous output, not efficency, my mistake I
    apologise.
    So that explains the 5V refernce OK, fair enough.
    Your a bit behing with you LED applications old chap, LS 5W 700mA in one
    LED. 1W LS is 350 mA at half the voltage.4 Amps really is not big nowadays.
    Aircraft runway lights are like LEDs,current driven, but do think it would
    be a small runway on 32 amps for the above reason.

    So go, do look at www.luxeon.com see what your device has to either better
    or for less.
    It certainly should make for an open debate.
    Crosspost,sci.electronics.design and sci.engr.lighting
    If it is I fear just a trudge down a long trudged path, again, and so poorly
    protected and presented for an interested investor.
    Well known and long trudged paths have been well protected and presented and
    have attracted considerable funds in the LED industry.

    Is there a trade secret that a competitors oscilloscope will not reveal?

    Adam
     
  8. I see you changed my message by trimming my post to remove the part
    where I said that it is obvious that cooling enables higher current
    and that higher current does not imply higher efficacy.

    So it seems I was not missing anything after all.
     
  9. Peter Lowrie

    Peter Lowrie Guest

    Is there a trade secret that a competitors oscilloscope will not reveal?
    All WOULD be revealed!!

    :peter Lowrie
     
  10. Peter Lowrie

    Peter Lowrie Guest

  11. My guess is that this is just a scam to make excitable but dim
    executives fluster onto ebay to bid for worthless patents.

    There seem to be a new breed of LED "experts" these days who are running
    seminars in this wondrous new lighting technology, and giving out rather
    dubious advice.

    Of course, the REAL experts are the guys and gals who have been working
    with LEDs for over 25 years and know them inside out. They will often
    recommend against wild over-driving for extra "pop". :)
     
  12. Peter Lowrie

    Peter Lowrie Guest

    Oops, that was unintentional.

    Nope, you're real close.

    Yours faithfully
    Peter Lowrie
     
  13. Darn, and I thought I would be keeper of the secret for less than a mil:
    "inventors irrevocable promise to keep secrets indefinately"
    "USD960,000"

    `scope regrettably, is not a magic wand, trust that I have at times wished
    that it was, it can only tell you things about voltage over time, and for
    960,000 dollars I want something that isn`t in the Radio Shack LED Projects
    for Beginers book......

    Adam
     
  14. Peter Lowrie

    Peter Lowrie Guest

    In my own defense; this is not the case, Clive.
    X = the unknown quantity
    Spert = a drip under pressure...LOL
    Hmm, you're right on about that.
    43-16=27

    Does 27 years experience count me as an expert?

    Yours faithfully
    Peter E. Lowrie
    http://www.geocities.com/ledaccelerator
     
  15. Certainly isn`t, not any patent numbers noted, application or granted.
    Trade secrets that `all would be revealed` with the most cursory
    examination with basic test equipment.
    Unfortunately Mr Lowrie you appear to offer not even a drip under pressure.
    Something we can all agree upon.
    Knowing what you are talking about when referencing Light Emmiting Diodes
    would help qualify you as an expert.

    Not knowing that your proposed method of increasing light output has been
    known for as long as LEDs have existed , afraid, does not support your
    claim to be an expert.

    Would suggest reading the LED FAQ:

    http://www.pioneernet.net/optoeng/LED_FAQ.html

    Adam Aglionby
    LED FX Ltd
     
  16. If you've been working extensively with LEDs for that time, then you
    should certainly know your way about them.

    As far as this patent auction goes... You can bet we'll be observing it
    with great interest.

    I only hope it's not one of those nonsensical "patent the rainbow" type
    of patents that the LED industry has been hampered with.
     
  17. Peter Lowrie

    Peter Lowrie Guest

    Good morning.

    By way of explanation I'd like to clear up some points that seem to have
    flummoxed some dear readers.

    1. It is not a power saving device. When I state that it has low power
    consumption, I'm detailing the hybrid circuit (module) and not it's output.

    2. When I state that it interconnects a 'nominal' 9 volt supply with a
    'nominal' 5 volt LED, I mean that these are the entry points for use of the
    circuit. Some LED's are 3 volts in which case 5 to 6 volts would be
    suitable for application. A 6 volt LED could be powered with a 10 to 12
    volt supply. If the device were to be used in a truck or a bus with 24
    volts supply then one would want to add a voltage divider (say 2 resistors
    at 150 ohms, wattage dependant on the size of the array being powered) at
    the input side. The tables supplied on the datasheets indicate "nominal"
    input and output voltage limits for each model...ie LAM9 or LAM9P, the "P"
    standing for power.

    3. The components used in the hybrid are rated far higher than I have
    provided for in the datasheets for safety sake. Therefore sinking more
    current than is specified would not damage the module.

    4. The hybrid module is designed with Cadsoft Eagle circuit CAD software -
    in essence, this is what is 'for sale'.

    5. Scoping the output of the module will provide a clue as to how it works.

    6. Lux increases, nM stays the same +- 10%

    Any other questions you may have will be gladly answered provided that I do
    not give the game away.

    I have a question for you. Should I post more details with links in other
    boards within these groups, such as the B/S/T section?

    Thank you for your continuing indulgence.

    LAM9 datasheet
    http://www.geocities.com/ledaccelerator/9/index.html

    LAM9P datasheet
    http://www.geocities.com/ledaccelerator/9p/index.html

    Yours sincerely
    Peter Lowrie
     
  18. Alien Zord

    Alien Zord Guest

    Here you demonstrate what I suspected right from the beginning, that you
    have absolute zero knowledge of electronics (or physics for that matter).
    12V / 1A or even 4A from 24V trough a 150R resistor?
     
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