C.O.B.S.S.L. News and Articles

Dloomis514

Dloomis514

Well-Known Member
Realistically, how long until this technology becomes as simple as printing a piece of paper? Decade or two?
 
FranJan

FranJan

Well-Known Member
COB NEWS + INFO:
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http://www.osram-os.com/osram_os/en/products/product-promotions/led-for-general-lighting/soleriq-family/soleriq-p/index.jsp

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Osram Opto Semiconductors has announced the Soleriq P 13 chip-on-board (COB) LED with significantly increased flux output to 6800 lm. The packaged LEDs target applications such as retail that require a tight beam pattern and high center beam candle power (CBCP).

The Osram announcement follows a recent trend of LED manufacturers boosting lumen output relative to the size of the light-emitting surface (LES) to deliver directional solid-state lighting (SSL) products with more punch. For example, Cree doubled the output of 6- to 12-mm COB LEDs earlier this year. And Philips Lumileds added a high-output 9-mm COB LED. The trend is based on the fact that smaller sources enable better beam control for directional lighting.

Indeed, Osram is targeting the new packaged LEDs at high-powered spotlights for retail, museum, and commercial applications. The company demonstrated the LEDs at the Electronica trade fair in Munich, Germany last week. The new LEDs match the output of previously-announced 19-mm-LES Soleriq S 19 packaged LEDs.

"Customers could compare the P 13 with the formerly launched Soleriq S 19 due to its similar light output of 4000 to 5000 lm," said Mark Dyble, product marketing manager for general lighting at Osram. "In fact, the new Soleriq P 13 has smaller dimensions and is therefore the right choice for more compact lighting solutions."

The new LEDs, in fact, deliver 3300 lm at 3000K CCT and 90 CRI or 4000 lm at 80 CRI when operating at 85°C and 1050 mA. But you can double the drive current for maximum output. Like other manufacturers promoting high-output packaged LEDs, Osram notes that the new products can use simpler, less expensive lenses relative to larger COBs while enabling more applications with fewer LEDs relative to smaller COBs.
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guod

guod

Well-Known Member

Attachments

guod

guod

Well-Known Member
Positivity said:
Haven't read the whole article yet...but this stuck out..
Click to expand...
... as BS, mostly
"This does not mean that the R9000er binning has a lower efficiency, so less electrical energy is converted into light.
Rather, it is that the spectral range of the R9000er series is widely dispersed and thus more light emits in spectral regions that are perceived by the human eye with significantly reduced intensity."
 
Positivity

Positivity

Well-Known Member
guod said:
... as BS, mostly
"This does not mean that the R9000er binning has a lower efficiency, so less electrical energy is converted into light.
Rather, it is that the spectral range of the R9000er series is widely dispersed and thus more light emits in spectral regions that are perceived by the human eye with significantly reduced intensity."
Click to expand...

Lol...gotta filter everything you hear and read. Thanks for the clear up on that
 
Mohican

Mohican

Well-Known Member
With the light frequency spectrum graphs the Y axis is always a relative "1"

I wish that there was a standard sea level clear day measurement or something similar to which all of these spectrum intensity charts could be compared.
 
nogod_

nogod_

Well-Known Member
Would be nice if they allowed you to plot the 3 different cri values of the same cct on the same graph. Doesnt look like theres much of a shift in the 600nm peak of 3000K between 80->90 just a slightly sharper peak for the 90.

zangtumtum said:
interesting curves are the 3000K and the 2700K-90CRI
Click to expand...
 
salmonetin

salmonetin

Well-Known Member
http://www.led-professional.com/products/leds_led_modules/everlight-electronics-adds-advanced-cob-led-series-with-easy-assembly-and-color-on-demand-options

http://www.led-professional.com/products/leds_led_modules/new-osram-ostar-stage-for-even-brighter-stage-lighting

http://www.led-professional.com/products/leds_led_modules/samsung2019s-1w-level-high-luminance-mid-power-led-package-lm302a

http://www.led-professional.com/products/leds_led_modules/samsung-completes-its-line-up-of-cob-packages-with-6-w-and-8-w-versions

http://www.led-professional.com/products/leds_led_modules/cree-r-sc5-technologytm-platform-doubles-light-output-to-radically-lower-system-cost

http://www.led-professional.com/products/leds_led_modules/osram-adds-compact-high-flux-p-13-version-to-the-soleriq-p-series-of-leds

http://www.led-professional.com/products/leds_led_modules/prolight-introduces-6-w-venti-3535-single-chip-package-driven-up-to-1.5a

http://www.led-professional.com/products/leds_led_modules/latest-addition-to-philips-lumileds-luxeon-cobs-delivers-exceptional-punch-for-spotlights-and-directional-lamps

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...IES Establishes New Standard For Spectral Data Transfer...

http://www.ledsmagazine.com/articles/print/volume-11/issue-9/features/standards/ies-establishes-new-standard-for-spectral-data-transfer.html

...Understand Color Science To Maximize Success With LEDs...

http://www.ledsmagazine.com/articles/2012/05/understand-color-science-to-maximize-success-with-leds-magazine.html

...Understand Color Science To Maximize Success With LEDs – Part 2...

http://www.ledsmagazine.com/articles/print/volume-9/issue-7/features/understand-color-science-to-maximize-success-with-leds-part-2-magazine.html

...Understand Color Science To Maximize Success With LEDs - Part 3...

http://www.ledsmagazine.com/articles/print/volume-9/issue-10/features/understand-color-science-to-maximize-success-with-leds-part-3.html

...Understand Color Science To Maximize Success With LEDs – Part 4...

http://www.ledsmagazine.com/articles/print/volume-10/issue-2/features/understand-color-science-to-maximize-success-with-leds-part-4-magazine.html

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http://www.ledsmagazine.com/articles/2014/12/zhaga-plans-a-new-interchangeable-source-book-including-cob-leds.html

saludos
 
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FranJan

FranJan

Well-Known Member
COB NEWS + INFO


Zhaga Consortium Starts Working on New COB LED Array Specification
http://www.lightimes.com/documents/view/sectornews.php?id=124596&sector=ledmod#top

(*Basically they are going to standardize COB design and hopefully that means holders and reflectors will be cheaper and easier to find. Good news for the COBsters.)
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December 11, 2014...The Zhaga Consortium, which develops specifications for interchangeable LED light sources, is now working on a new Book that will include Chip-on-Board (COB) LED arrays. COB arrays are in widespread use, but different manufacturers offer a wide range of alternative sizes. The consortium notes that this creates problems for luminaire makers and other stakeholders such as COB holder suppliers and limits their options of using alternative products from different suppliers.

“We consulted many luminaire makers, and received broad support for our plans to standardize this type of LED light source,” said Musa Unmehopa, secretary general of the Zhaga Consortium. “These companies asked us to standardize properties such as the mechanical dimensions of the module, the position of electrodes, and the diameter of the light-emitting surface.”

Zhaga says its standardization removes arbitrary variations in a small number of parameters, to allow interchangeability of LED light sources. The consortium contends that for customers, standardization simplifies the comparison and selection of products. The consortium says that it allows COB-array makers to focus on offering value-added differentiation to customers, such as luminous efficacy, quality of light, or thermal properties.

“For Zhaga Books to be successful, they need to reflect the wishes of the market,” said Unmehopa. “We welcome any input from COB makers or other companies, who are invited to join Zhaga and contribute to the ongoing discussions.”

The new Zhaga Book will define rectangular and square LED modules with a circular light-emitting surface (LES) and a separate LED driver. The Book will define a family of modules with different dimensions. In the majority of cases, modules that are compliant with the new Book will employ COB technology* for the light-emitting section. However, the Zhaga specification will not prevent the use of alternative technology approaches.

After extensive discussion the consortium decided to specify a family of six rectangular or square modules, with the following PCB dimensions: 12 x 15 mm, 16 x 19 mm, 19 x 19 mm, 20 x 24 mm, 24 x 24 mm, and 28 x 28 mm.

The circular LES sizes defined in the new Book will correspond to the LES categories specified in several current Zhaga Books that cover spotlight modules (Books 3, 5, 10 and 11). COB LED arrays are used both with and without holders, depending on the luminaire type and application. The consortium expects that the new Zhaga Book will also include specifications for these holders.

In common with other Zhaga specifications, the new Book will only restrict the parameters necessary to enable interchangeability. In addition to PCB dimensions and thickness, such parameters are likely to include the location of the LES centre point; the position and size of the electrode positions; and the location of the thermal measurement point.

Screw holes will be optional, since many COB arrays are mounted directly using a thermal interface material. However, if screw holes are used, then their position and size should conform to the Zhaga specification.

Zhaga plans to discuss whether other features should be part of the specification such as a current-setting resistor to the board, for example, or the adding a temperature sensor to prevent over-temperature operation.
 
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