Date
Place
- Room H (Room Hall 1, 1F)
- P1. Poster Session I
- August 20, 2015 (Thursday)
- 14:00 ~ 15:30
- [P1-68]
- 14:00 ~ 15:30
- Title:Elimination of Off-Axis Color Shift by Doping Dichroic Dyes in a Cholesteric Liquid Crystal Device
- Jun-Hee Park, Seung-Won Oh, and Tae-Hoon Yoon (Pusan Nat'l Univ., Korea)
Abstract: We propose a method to eliminate the color shift in CLC devices by doping dichroic dyes. We measured the color coordinates in CIE chromaticity diagram of the fabricated CLC cells for polar angles from 0¡Æ to 60¡Æ. A CLC cell designed to reflect red color shows severe color shift as the viewing is increased. The red color changed to green at 60¡Æ. On the other hand, a dye doped CLC (DDCLC) cell remains nearly at the same color even for the viewing angle of 60¡Æ. Similar results can be observed in CLC and DDCLC cells designed to reflect other colors. We confirmed that higher concentration of dye molecules improve color sensitivity and reduce the off-axis color shift in a DDCLC cell. We expect that DDCLC cells can be applied to outdoor displays that require less off-axis color shift.
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