Sharp Takes Stab at Multi-Chip LED Modules

Sorry I’ve been away from blogging lately. Great to be back. Well, let’s start out with a neat little piece about Sharp. Sharp has recently introduced a line of LED modules each consisting of 30 LED chips divided into 10 parallel-switched groups of 3 LED chips on an aluminum ceramic substrate. The modules range from standard white to warm white up to what Sharp calls “High Color Rendering” (HCR) modules. These have CRI (Color Rendering Index) of 90. These new modules range in output from 170 lumens for the HCR modules to 280 lumens for the standard white module when driven at 360 mA. I’d like to see how well these can handle being driven to 720 mA on a graphite heat spreader. Anyrate, stated efficiencies are 80 lumens per watt for the standard white down to 50 lumens per watt for the HCR. Stated life cycle is 40,000 hours for all modules in the line.

Now all Sharp has to do is come up with a really spiffy name for these things and they’ll be all set. Maybe, Sharp Light Sabers…no,no,no….Sharp Star-O’s….Sharpeon’s? Super Sharp’s? Sharpstone? Hmmm….

Anyrate, you can check out the entire press release at LEDs Magazine

Technorati Tags: leds , led modules, led technology , leds in the news , warm white leds, color rendering index, cri, high color rendering, sharp leds, shapr microelectronics

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Bare Die Attachment? Yes, Please!

I pose a question to all of my readers (OEMs, engineers, developers, or anyone else for that matter): Have any of you worked on any LED bare die attachment projects? I would be very interested to know what the project entailed and how it went? Please comment this posting or, if you feel more comfortable, email me using the contact me tab above.

Thanks!

Technorati Tags: leds, led die, led dies, led chips, led manufacturing, bare die, bare die attachment, led bare die attachment

Cree to Obsolete The Light Bulb?

Hmmmm….could be. Cree just announced they have achieved 1000+ lumens from a single-die XLamp LED driven at 4 Amps yielding a luminous efficacy of 72 lumens/watt which is about the same output level of a standard fluorescent lamp. Wowza! That is a lot of light but at the same time, that is a lot of current when you consider that most of today, commercially released high-power LEDs are driven at about 350 mA. I would really like to see the cooling that was employed. I’m thinking cryogenic perhaps or BHF’s (Big Honking Fans) maybe? How long did the XLamp last before it ruptured the space-time continuum and disappeared or melted into a pool of molten semiconductor?

Anyrate, the disclosure is very positive news for Cree and the LED industry at large. It’s only a matter of time now before LEDs are the defacto-standard in home lighting.

Click here to read the entire story

Technorati Tags: leds , solid-state lighting , lighting industry news , lighting industry market , lighting market , solid-state lighting market , lighting market analysis , global led market , global led news, global lighting industry , global lighting fixtures , global lighting , led technology , leds in the news , Cree, Cree XLamps, XLamp LEDs, XLamp, brightest white led, record breaking leds, 1000 lumens, leds replace light bulbs, light bulbs, lamp replacements, led breakthroughs

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Osram supplies LEDs for street lights, unveils new Golden Dragon

Osram just released a new Golden Dragon LED with oval-shaped lenses with 20 or 40 degree viewing angles specifically for roadway illumination. Head over to my Architectural Lighting Blog to get the rest of the story. Hopefully I’m not dating myself with the Lucky Charms joke I posted. Let me know.

Technorati Tags: leds , solid-state lighting , lighting industry news , lighting industry market , lighting market , solid-state lighting market , lighting market analysis , global led market , global led news, global lighting industry , global lighting fixtures , global lighting , led technology , leds in the news , OSRAM inc, OSRAM leds, OSRAM modules, dragon leds, ostar leds, record breaking leds, brightest red led, brightest green led, dragon leds, golden dragon leds, road lights, pathway lighting, footpath lighting, lensed golden dragon leds, osram roadway lighting

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OSRAM Shows Their Colors Shattering Brightness Records

OSRAM Sets a New World Record in the Laboratory
Here’s some buzz from the OSRAM corner. They haven’t been making as much noise lately (they did announce they would be dropping OLED passive matrix displays but thats about it) as some of the other big guys in the industry but never count these guys out. Here they are breaking world records and all. The article does fail to mention that they also set the bar for green LEDs at over 100 lumens at a 350 milliamp power consumption for an efficacy of about 72 lumens/watt. You can expect to start seeing this technology in OSRAM’s Dragon and Ostar LEDS around mid-next year with samples going out late this year or early next. The green LEDs will find use in backlighting applications and the red LEDs in projection applications.

Now that’s bright baby!

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Lumileds flips chip design – A bright idea?

Lumileds introduces thin-film flip chips to boost LED brightness
Yet another chip design from Lumileds. What is that now, three or four package changes over the last year or two? Thats gotta make it tough for their OEMs, that along with their recent drop in price point from the stratospheric down to something a bit more reasonable has, I have heard from an insider, the OEMs fuming and some jumping ship to find alternative sources (i.e. Cree, Inc.). Will be interesting to see where this one goes. I’m not knocking Lumileds, just reporting the buzz I have heard from the industry. Neat technology though!

Technorati Tags: leds, led modules, solid-state lighting, high-power leds, high power leds, ultra bright leds, super bright leds, super bright light, luxeon, lumileds, lumiled, flashlight, led flashlight, flash module, flash led, flash led module, bright white led

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