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CO_2 레이저빔을 이용한 TFT-LCD 도광판의 패턴 제작에 관한 연구
김경동,백창일,송철기,안성훈 경상대학교 생산기술연구소 2002 工學硏究院論文集 Vol.2 No.-
A light guide panel is an element of the LCD backlight module that is often used for the display of compact electronic devices. In this study, a laser marking system is proposed to fabricate light guide panel, which can replace other manufacturing methods such as silk printing, stamping, or v-cutting methods. The objective of this research is to evaluate the process parameters of the laser marking system. Light guide patterns were marked with a 50W CO_2 laser(CW) to understand the effects of average power and scanning speed on the geometry and quality of groove pattern. The width of the fabricated grooves increases with increasing laser power and decreasing scan speed. In order to analyze surface characteristics and optical properties(luminance, uniformity), SEM photography and BM7(luminance measuring system) were used. As a result, the optimal conditions of the process parameters that provide high luminance was obtained.