Connect with us

LED Luminosity debate continues...

Discussion in 'Electronic Design' started by Adam Aglionby, Nov 28, 2003.

Scroll to continue with content
  1. Peter Lowrie : http://www.geocities.com/ledaccelerator/9/index.html posted
    over at www.candlepowerforums.com this is my reply interspersed with Mr
    Lowries original post :

    Quote:
    ----------------------------------------------------------------------------
    ----

    It aint a con or snake oil, it's for real. I have made no claims as to
    efficiency.


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



    I am pleased you have found your way here Mr Lowrie.
    Indeed my mis-interpretation of efficiency calims, in fact increased output
    claims, I do apologise.


    Quote:
    ----------------------------------------------------------------------------
    ----

    1 LED = Diode = 1/2 thermocouple, how can I say much about how it works
    without giving the game away.



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



    Well thermocouple generates a voltage in proportion to applied heat, are you
    confusing this with the peltier effect where the reverse is to an extent
    true?
    Indeed, one of the difficuties you appear to have is offering protection for
    any potential investor.
    You are seeking substantial investment.
    An investor either looks for international competently drafted Patents and
    applications, a whole other subject in itself.

    OR

    A `trade secret` like Coca - Cola`s secret recipe for instance.Your reply to
    my question about protectable trade secrets in sci.engr.lighting on 19th
    November 2003,meassage i.d. sxRub.8381$ was


    Quote:
    ----------------------------------------------------------------------------
    ----
    All WOULD be revealed!!

    :peter Lowrie


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




    Quote:
    ----------------------------------------------------------------------------
    ----

    My claim is that it makes LEDs, at least, a little more useful and up to
    four times brighter.


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



    It is a bold claim, 4 times brighter would indeed be a useful gain, but at
    what cost, in efficiency, life, lumen maintenance and colour shift?


    Quote:
    ----------------------------------------------------------------------------
    ----

    The circuit per se is not to be found in any electronics hobby project
    publications.


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



    I do stick with my oroginal assertion of the 20th November in
    sci,engr.lighting, tjUub.5475$


    Quote:
    ----------------------------------------------------------------------------
    ----

    `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......


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



    Wether explicitly or not in a hobbyist or reference electronic text, for USD
    $960,000 exclusive and PROTECTABLE rights to the technology are essential.

    I suspect your lack of even a Patent Application is a sign that as can be a
    problem with Patents, you have been beaten with Prior Art and you are aware
    you have.


    Quote:
    ----------------------------------------------------------------------------
    ----

    That I thought of it first, and you did not think of the idea until I posted
    info on it, is reason to be sceptical and curious, as opposed to judgmental
    and bad mannered.


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



    I must admit to still being mystified as to what your idea is and how it is
    supposed to work.

    Unfortunately as we have previously agreed LED land is infested with dubious
    claims from dis-ingenuous characters.

    Someone appearing claiming to boost LED brightness by 4 times, an obvious
    lack of knowledge of the state of the art in LEDs and absolutely no proof or
    demonstration to back up there claims, is likely to meet a less than
    rapturous reception, in a newsgroup that is dedicated to the most technical
    aspects of lighting.

    Consistently failing to provide any backing for your claims is ill mannered
    and liable to encourage less than flattering judgement.


    Quote:
    ----------------------------------------------------------------------------
    ----

    I suppose we could mount the LED in liquid Nitrogen, that would work. ;-)


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



    As far as I remember ther are some difficulties with actually getting an LED
    to work at these temperatures, hopefully someone could fill in some more of
    the detail.

    The development of blue and white LEDs was down to the determination of one
    man Shuji Nakamura.
    New Zealand is the home of the innovative stage lighting manufacturer
    Selecon.
    It is not impossible that you Mr Lowrie have developed a new way of driving
    LEDs that has evaded the resources of much larger corporations.

    However until you provide proof of your invention/development actual
    operation that matches your claim for it, many will remain unconvinced.

    This reply to your post on www.candlepowerforums.com will be crossposted to
    usenet sci.engr.lighting and scie.electronics.design.

    To qualify your claim will you provide a working sample, on receipt of a
    binding non-disclosure agreement, to a member of one of these groups for
    independent testing?

    Adam
     
  2. Peter Lowrie

    Peter Lowrie Guest

    Well, I have checked out ebay et al and I'm yet to find a suitable group in
    which to place the advert. I was hoping they might have a section
    specifically for IP and other intangibles, but alas I have yet to find one.

    By way of an update. One US manufacturer remaining unnamed has asked to see
    the accelerator using their product(s). I want to use their torch heads
    with their little reflectors intact. I suppose I should forbear in placing
    the IP on any e-Auction until I have sent them photos.

    Also!!! Thanks for all your feedback. I have read and absorbed your
    information, advices and prompts with keen interest. Having taken onboard
    some excellent suggestions I am going to do the following:

    A. Provide photo's of the circuit in action - driving arrays of LED's.
    B. Provide photo's of one of the original prototypes on breadboard.
    C. Provide Lux and frequency data.
    D. Provide some before and after photo's and voltage data.

    All will be posted to the Geocities website in due course.

    Yours sincerely
    Peter Lowrie
     
  3. 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
     
  4. Photos and "data" can be fabricated to order. So far all you've provided
    is:

    A. Evidence of serious gaps in your knowledge of LED and light science
    B. Repeated and unsupported assurances that your device works
    C. Repeated pleas for just shy of a million US dollars

    *yawn*

    You should speak with Daniel Karpen; the two of you seem to have a lot in
    common.

    DS
     
  5. Alien Zord

    Alien Zord Guest

    My reply to your earlier post:
    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?
     
  6. N. Thornton

    N. Thornton Guest


    Hi Alien - where do you get those 1A and 4A figures?

    Regards, NT
     
  7. Alien Zord

    Alien Zord Guest

    From his "data" sheets:
    http://www.geocities.com/ledaccelerator/9/index.html
    Even though there's a mention of current sinking capability and thus one
    could argue that the LED current could flow via a different path that's not
    what he stated. His clear advice is to use the 12V assembly from 24V via a
    voltage divider consisting of two 150 ohm resistors with "wattage dependent
    on the size of array being powered". If the LED current wasn't taken from
    the resistive divider why would "the wattage be dependent on the size of the
    array"?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-