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- Title
Dual-backlight unit based on a single light source integrated with a beam splitting reflector.
- Authors
Chan-Kyu Park; Hak-Soon Lee; Sang-Shin Lee
- Abstract
A dual-backlight unit incorporating a single light source integrated with a beam splitting reflector was demonstrated, providing a surface light beam for both the keypad and display section simultaneously. The reflector was realized by aligning a groove substrate with a matching cover, and a light guiding module comprising a stack of light guide panels and prism/diffuser sheets was attached to both sides of the reflector. A light emanating from the light source—placed in the middle of the substrate—undergoes a series of reflections through the reflector to reach the input of the light guiding module. Then it is transformed into a surface light beam, which is used to irradiate the keypad and display sections. As for the accomplished dual-backlight unit, the measured average luminance and the spatial luminance uniformity were respectively about 420 cd/m2 and 70% for the keypad section, and 640 cd/m2 and 80% for the display section. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1257–1260, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24297
- Subjects
LIGHT sources; BEAM splitters; LIGHTING reflectors; FIBER optic lighting systems; SPECULAR reflectance
- Publication
Microwave & Optical Technology Letters, 2009, Vol 51, Issue 5, p1257
- ISSN
0895-2477
- Publication type
Article
- DOI
10.1002/mop.24297