Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2007.06a
- /
- Pages.429-429
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- 2007
Study on Luminance Characteristics in a Design of LED Backlight by the Light-Entering Face Treatment
LED 백라이트 설계에서 입광부처리에 따른 휘도분포의 광학적 해석
-
Han, Jeong-Min
(Yonsei Univ.)
;
- Kim, Byoung-Yong (Yonsei Univ.) ;
- Kim, Jong-Yeon (Yonsei Univ.) ;
- Kim, Jong-Hwan (Yonsei Univ.) ;
- Kim, Young-Hwan (Yonsei Univ.) ;
- Lee, Sang-Keuk (Yonsei Univ.) ;
- Ok, Chul-Ho (Yonsei Univ.) ;
- Kang, Dong-Hun (Yonsei Univ.) ;
-
Seo, Dae-Shik
(Yonsei Univ.)
-
한정민
(연세대학교)
;
- 김병용 (연세대학교) ;
- 김종연 (연세대학교) ;
- 김종환 (연세대학교) ;
- 김영환 (연세대학교) ;
- 이상극 (연세대학교) ;
- 옥철호 (연세대학교) ;
- 강동훈 (연세대학교) ;
-
서대식
(연세대학교)
- Published : 2007.06.21
Abstract
In this study, it was investigated about the variation of luminance properties in LED backlight with geometrical shape such as prism or lens shape on the light-entering face. Generally, LED light source has the loss in backlight system because it has horizontal direction light. PMMA(Poly-Methyl-Meta-Acrylate) is used LGP(Light-Guide-Plate) in conventional backlight system. PMMA has low refraction angle. so that. horizontal direction light was not used in backlight system. The addition of geometrical shape in light-entering face in LGP improves the luminance characteristics because it prevents horizontal direction light generation in light-entering-face. Prism or lens shape in same pitch disposition was almost same without these treatment such as the value of 1% rising. Besides. It is particular that the gap of these shape such as the value of 0.407~0.22mm prevents horizontal direction light, so then it contributes luminance rising at 5.6%.