LED-based lightguides address wearables

May 24, 2016 // By Julien Happich
Addressing both the requirements of functional illumination (backlighting and front-lighting of displays and indicators) and decorative illumination (contours, logos), Global Lighting Technologies puts its thin lightguide technology to the fore.

For wrist-worn devices, GLT produces lightguides as thin as 0.25 mm, using as few as one LED to illuminate LCDs in conventional, GPS, and fitness watches. This not only allows for a thinner profile on the user’s wrist, but also enables a decrease in power consumption, resulting in increased battery life and enhanced performance. With proper design and LED coupling, the efficiency and uniformity of these backlights can outperform much thicker lightguides, the company claims.

In the clothing side of the wearables market (including accessories), GLT has products in the 0.25 mm to 0.40 mm thickness range made of polycarbonate (PC) material that can be flexible. These lightguides can be combined with single colour LEDs as well as RGB (red, green, blue) LEDs to produce backlights for logos and decorative elements.

For the head-worn market including AR and VR devices, GLT has created customized lightguides with focused and directed light emissions patterns necessary for the proper illumination of displays. This assists with the performance by directing the projection of images from the LCD to the eye creating the final user experience.

Visit Global Lighting Technologies at www.glthome.com