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Proceedings Paper

A superior architecture of brightness enhancement for display backlighting
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Paper Abstract

Brightness enhancement of backlighting for displays is typically achieved via crossed micro prismatic films that are introduced between a backlight unit and a transmissive (LCD) display. Prismatic films let pass light only into a restricted angular range, while, in conjunction with other reflective elements below the backlight, all other light is recycled within the backlight unit, thereby increasing the backlight luminance. This design offers no free parameters to influence the resulting light distribution and suffers from insufficient stray light control. A novel strategy of light recycling is introduced, using a microlens array in conjunction with a hole array in a reflective surface, that can provide higher luminance, superior stray light control, and can be designed to meet almost any desired emission pattern. Similar strategies can be applied to mix light from different colored LEDs being mounted upside down to shine into a backlight unit.

Paper Details

Date Published: 11 September 2006
PDF: 8 pages
Proc. SPIE 6338, Nonimaging Optics and Efficient Illumination Systems III, 63380G (11 September 2006); doi: 10.1117/12.683208
Show Author Affiliations
Oliver Dross, Light Prescriptions Innovators (Spain)
William A. Parkyn, Light Prescriptions Innovators (United States)
Julio Chaves, Light Prescriptions Innovators (Spain)
Waqidi Falicoff, Light Prescriptions Innovators (United States)
Juan Carlos Miñano, Light Prescriptions Innovators (Spain)
Pablo Benitez, Light Prescriptions Innovators (Spain)
Roberto Alvarez, Light Prescriptions Innovators (United States)


Published in SPIE Proceedings Vol. 6338:
Nonimaging Optics and Efficient Illumination Systems III
Roland Winston; Pablo Benítez, Editor(s)

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