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Evaluation of the Light Guiding Panel Performance with a Plastic Optical Fiber Source
Seung Suk Lee · Hye Joon Ma · Yongjin Shin · Eun Seo Choi ∗
Department of Physics, College of Natural Science, Chosun University, Kwangju 501-759 (Received 10 July 2012 : revised 30 July 2012 : accepted 30 August 2012)
In this study, light emission induced from side illumination of a plastic optical fiber was used as a light source for a conventional liquid crystal display, and the feasibility of using the fiber as a light source for a display was demonstrated. Before experimental implementation, a specific pattern was made to extract light from the plastic optical fiber. Simulation results showed overall uniform light illumination at P-type, where P-4 presented the most uniform distribution. Also, the O-1 pattern among O-type patterns resulted in the highest illumination of 0.4358 cd/cm
2. Based on these results, some types of P-type patterns were implemented in the plastic optical fiber by using a CO
2laser. The prepared laser-processed plastic optical fiber was applied to a light guide panel as a light source, and the light illumination performance of the light guide panel was measured. From the measurement results, the plastic optical fiber having a P-4 pattern provided the best uniform illumination 59% when it was used as the light source. The experimental results demonstrated that the plastic optical fiber could be applied as an alternative to a conventional light source for liquid crystal displays by adjusting the pattern distance and depth.
PACS numbers: 42.15.Dp, 42.62.Cf, 42.15.Eq
Keywords: Plastic optical fiber, Side illumination, Light guiding panel, Uniformity
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