도광판의 산란패턴 가공조건에 따른 LED평판조명시스템의 광학적 특성 (Optical Characteristics of LED Flat Lighting System According to the Scattering Pattern Processing Conditions of the Light Guide Plate)

서지정보

· 발행기관 : 한국물리학회
· 수록지 정보 : 새물리 / 74권 / 10호 / 1098 ~ 1105페이지
· 저자명 : 박소희

초록

조명시스템의 광학적 효율을 향상시키기 위해서는 빛을 보다 효과적으로 제어할 수 있도록 광학적 특성을 이용한 설계과정이 중요하다. 본 연구에서는 도광판의 가공조건에 따른 LED평판조명시스템의 광학적 특성을 분석하고자 3 mm 두께의 도광판 하단에 폭과 깊이가 0.5 mm이고, 정점과 빗면에서의 각도가 각각 53.14°, 63.43°인 v-groove패턴을 모서리에서 중앙을 향하는 사선형태로 설계하여 산란패턴의 간격을 1mm씩 증가하도록 10개의 매개변수를 적용하고 광선추적(Ray-Tracing)기법으로 전산모사 하였다. 그 결과 패턴 간격이 1 mm인 경우 조도값은 69 lx인 반면 10 mm일 때 112 lx로 62.3%가량 증가하였으며, 중심부에 대해 영역별로 지정된 광특성을 분석한 결과 패턴의 간격이 10 mm인 경우 최소값 80 lx, 최대값 163 lx로 균일도가 49%인 반면, 패턴의 간격이 1 mm인 경우 최소값 20 lx, 최대값 239 lx로 균일도가 8%로 패턴의 간격이 줄어들게 되면 중앙부에서 광량이 증가하게 되어 균일도가 급격히 저하되는 것을 알 수 있었다.

영어초록

In order to improve the optical efficiency of a lighting system, a design process using optical characteristics is important to control light more effectively. In this study, to analyze the optical characteristics of the LED flat lighting system according to the processing conditions of the LGP, a v-groove pattern with a width and depth of 0.5 mm was created at the bottom of the LGP with a thickness of 3 mm, and the angles at the vertex and the oblique plane were 53.14°, respectively, was designed to be 63.43°. And we designed the pattern in the form of a diagonal line from the edge of the LGP toward the center. Then, 10 parameters were applied to increase the distance of the scattering pattern by 1 mm, and computer simulation was performed using ray-tracing technique. As a result, when the pattern distance was 1 mm, the illuminance value was 69 lx, while when the pattern distance was 10 mm, it was 112 lx, showing an increase of about 62.3%. As a result of analyzing the optical characteristics specified by region for the center, it was found that when the pattern distance was 10 mm, the minimum value was 80 lx and the maximum value was 163 lx, resulting in a uniformity of 49%. On the other hand, when the pattern distance was 1 mm, the minimum value was 20 lx and the maximum value was 239 lx, resulting in a uniformity of 8%. As a result of these, it was found that when the distance between patterns is reduced, the amount of light increases in the central part, leading to a sharp decline in uniformity.

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