Monday, 06 Oct, 2008 Technology

World's First Glass-Packaged White LED


At CEATEC two Japanese companies: Sumita Optical Glass Inc and Toyoda Gosei Co Ltd presented their glass-packaged white LED, which has several advantages over the usual plastic-packaged LEDs.

Due to the fact that glass package wears out more slowly than the plastic one it has a longer product cycle. The glass-package has a better resistance to heat, which is why the light-emitting elements can be positioned more densely. In addition, a higher luminance can be reached in a glass-package though the use of a high electric current.

The two companies refused to reveal the composition of the glass. By applying their patented technologies, both Sumita Optical Glass Inc and Toyoda Gosei Co Ltd are able to change the shape of the mold thus playing with the shapes of the glass-packaged white LED.

The two companies outlined that LEDs packed in glass can be used at temperatures as high as +200C. It is worth mentioning that LEDs packed in epoxide resin and silicone resin can only be used at up to +80C. Thus, for a specific usage, the amount of current that can be used can reach 150mA.

Currently the two companies look forward to apply their technology as a light source in a line camera that is utilized to analyze the glass substrates used in manufacturing flat-panel displays.

Sumita Optical Glass and Toyoda Gosei said that due to its high resistance to heat and the ability to use electric current of 100mA, the new LED can create a luminance of approximately 200,000lx. Because of their low luminance the existing LEDs are not used in line cameras as the sources of light.

Both companies hope to increase the way their glass-packaged white LED is used. Toyoda Gosei also looks forward to present the details of the new technology.

Source: Tech-ON!

Powered by


48 votes

//6 Jun 02, 2010 08:00 PM | posted by: teen
This will help in saving current and avoid eye- shy.
Power problem will be solved somehow.
41 votes

//5 Jun 02, 2010 07:52 PM | posted by: teen
This will help in saving current and avoid eye- shy.
Power problem will be solved somehow.
51 votes

//4 Dec 05, 2008 08:36 PM | posted by: caehappy
This so cool it should be used to help other usful things
60 votes

//3 Oct 07, 2008 02:32 AM | posted by: Sean
White LEDs have been around for a while and they are still quite expensive but their long life makes up for it
49 votes

//2 Oct 07, 2008 12:23 AM | posted by: JIff WIlson
Wow a White LED? That should save a LOT of electricity shouldnt it?
41 votes

//1 Oct 07, 2008 12:00 AM | posted by: Unknown
This sounds like it could be applied to bicycle lights which would make them brighter and hopefully male us cyclists safer.

Good job.


Add your comment:

antispam code





Discover, share, comment and discuss with us on a variety of interesting stories. A lot of fascinating things are taking place every day around the globe and we welcome you to this world.