Optical design of liquid crystal display backlighting

doi:10.1088/1464-4258/5/5/377

Optical design of liquid crystal display backlighting with highly scattering optical transmission polymer

Takamitsu Okumura et al 2003 J. Opt. A: Pure Appl. Opt. 5 S269-S275 doi: 10.1088/1464-4258/5/5/377

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Takamitsu Okumura^1,2, Takeshi Ishikawa¹, Akihiro Tagaya^1,2 and Yasuhiro Koike^1,2
¹ Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
² Exploratory Research for Advanced Technology (ERATO) Koike Photonics Polymer Project, Japan Science and Technology Corporation, K2 Town Campus 144-8 Ogura, Saiwai-ku, Kawasaki 212-0054, Japan
E-mail: t_okumura@appi.keio.ac.jp

Abstract. We have developed a highly scattering optical transmission (HSOT) polymer, and have succeeded in applying it to a highly efficient backlight light guide in liquid crystal displays (LCDs). In the present work, a multiple scattering modelling simulation has been developed. Also the effects of adjacent particles inside the HSOT polymer are demonstrated. The numerical calculation, improved by taking account of the adjacent particles, has precisely reproduced the multiple scattering phenomena inside the HSOT polymer. Based upon the results of the multiple scattering analysis, an optimal design has been developed and applied to an LCD backlighting system. By altering the internal particle conditions, uniformity of colour and brightness on the top face of the backlight has been achieved.

Keywords: Backlight, multiple scattering, Mie theory, Monte Carlo method, optical design

Print publication: Issue 5 (September 2003)
Received 15 November 2002, accepted for publication 26 June 2003
Published 22 August 2003

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Optical design of liquid crystal display backlighting with highly scattering optical transmission polymer

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