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Optoelectronics/Displays??

Keyboard backlight requires less power, fewer LEDs

Posted: 12 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:keyboard backlight? LED-based backlight?

Global Lighting Technologies (GLT) Inc. has introduced a thinner, LED-based backlight for use with desktop or notebook PC keyboards. The LED-based backlight is said to provide excellent brightness and uniformity, along with the opportunity to use fewer LEDs. This reduces the cost of the backlight and power consumption associated with other backlighting methods such as screen-printed light guides or direct LED lighting.

Typical backlight thicknesses of 0.6mm to 0.8mm can be provided for desktop keyboards and 0.3mm to 0.4mm for laptop keyboards. The backlight design combines the company's patented MicroLens light extraction technology and optical engineering expertise to extract more light from the backlight through to the keyboard, which increases brightness while spreading the light more uniformly.

The backlight design employs side-firing LEDs, which can be located on the edge of the light guide, or in some cases, in the middle of the backlight, depending on the surrounding geometry. Custom designs are easily scalable to different sizes, said the company.

- Gina Roos
eeProductCenter




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