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감광성 도판트를 이용한 풀컬러 구현 가능 반사형 콜레스테릭 액정
박서규,김정수,조희석,권순범,유리레즈니코프,Park, Seo-Kyu,Kim, Jeong-Soo,Cho, Hee-Suck,Kwon, Soon-Bum,Reznikov, Yuri 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.5
In order to make full color cholesteric displays, color filter-less R, G, B sub-pixel structured cholesteric LC cells have been studied. To make R, G, B colors, UV induced pitch variant chiral dopant was added to cholesteric LC mixtures. The concentration of the photo-sensitive chiral dopant was adjusted so that the initial state showed blue color and the color was changed from blue to green and red with increase of UV irradiation to the cholesteric cells. To prevent the mixing of R, G, B reflective sub-pixel liquid crystals, separation walls were formed using negative photo resister in boundary area between sub-pixels, Through the optimization of the material concentrations and UV irradiation condition, vivid R, G, B colors were achieved.