Thin LED light module using the inclined edge and inhomogeneous pattern reflection of a light guide plate

• Published in: Electronic materials letters Vol. 9; no. Suppl 1; pp. 55 - 58
• Main Authors: Jang, Ji-Geun, Hwang, Sun-Nam, Lim, Sungkyoo
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.10.2013; 대한금속·재료학회
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed Matter Physics; Materials Science; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; 전자/정보통신공학; inhomogeneous pattern reflection; bezel; LED light module; inclined edge
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-013-3184-1

A low-power, high-brightness, thin, and flat LED light module was fabricated. LED arrays attached to the four walls of the lower part of a light guide plate (LGP) were used as the light source. The LGP was composed of a lower part with dot patterns on the bottom side, an intermediate section with inclined edges for the reduction of the bezel area, and a light-exiting plate. The bottom sides of the inclined edges and lower plate were coated with metal films for light reflection. The dot patterns on the bottom side of the lower plate were more concentrated in the center to obtain uniform brightness by inhomogeneous reflection. The dimensions of the fabricated LED light module were 100 mm (L) × 100 mm (W) × 10 mm (T). The average brightness and luminous uniformity of the LED light module were 12,155 cd/m 2 and 96.7%, respectively.