Anyone know the manufacturer of this LED?

[xiphmont]

I've been working on a backlight retrofit project with some odd and fairly tight spectral output requirements. Specifically, I need a cool-white LED with a very low CIE Y value. Something around x=.3 y=.28 resulting in a purplish/pinkish tinge.

As luck would have it, one of the first engineering samples I ordered from <insert random Chinese Supplier here> as part of a larger kit nailed the requirement perfectly. What luck! I ordered an additional large lot of exactly the same part--- and was sent completely different LEDs the second time around. The combination of language barrier and reluctance to name their own suppliers has meant I've made no progress on tracking more of these suckers down. I have 50. I need about 2000.

Top:

Bottom:

Profile:

Internal (with lens ripped off, unfortunately taking the chip with it):

Does anyone recognize who manufactured these 0805 LEDs? The key identification points are the half-circle green dot, the internal trace structure, the very thin pads on the top (with a separate piece of metal making up the pads along the side?), the very wide pads on the bottom that crowd the green 'T' cathode marker, and a fairly thick profile.

Comments

Your request

[(Anonymous)]

Hi Monty Montgomery

I work with many LED factories and their components suppliers, and I am based in Hong Kong, China. I know many factories who can make the 0805 LEDs. But as a back lit project I think its better to understand what you are using them for? Perhaps I could offer you a better solution. Please email more information on your request so I can understand more about what you are looking for and possibly how we can help you. Jenniferyang@dhclgroup.net

Re: Your request

[xiphmont.livejournal.com]

Excellent! email sent!

Re: Your request

[xiphmont.livejournal.com]

Jennifer, your email address has been bouncing all replies with:

<jenniferyang@dhclgroup.net>:
user is over quota

for the past week and a half.
I can't reply to your email, and haven't gotten a call through to the numbers you listed in Hong Kong (there does not seem to be voicemail).
Hopefully this message makes it to you somehow.

Turnover

[(Anonymous)]

A response from the internet within 13 hours? For such a detailed question?

Monty, you best give the nice person a finders fee! :D

Re: Turnover

[xiphmont.livejournal.com]

Yes, though still at the stage of 'fingers crossed' :-)

For those wondering why this matters

[xiphmont.livejournal.com]

This is the resulting screen color using a high-quality 6500K white LED:

This is the screen color using the the LEDs in the picture above:

Now you can see why I'm looking for those exact LEDs, or at least something as good. No other LED thusfar has even come close.