Browsing by Author "Lin, Yan-Rung"

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A polarizer-free flexible and reflective electrooptical switch using dye-doped liquid crystal gels
(2008-02-04)
Lin, Yi-Hsin
;
Yang, Jhih-Ming
;
Lin, Yan-Rung
;
Jeng, Shie-Chang
;
Liao, Chi-Chang
A polarizer-free flexible and reflective electro-optical switch using dye-doped liquid crystal (LC) gels is demonstrated. The electro-optical performances of both scattering and absorption based dye-doped LC gels depend on curing temperatures due to domain sizes of polymer networks. Such flexible electro-optical switch is bendable and trim-able because of the vertical polymer networks and gel-like materials. The dye-doped LC gel shows good reflectance similar to 55%, good contrast ratio similar to 450: 1 and fast response similar to 6.4ms at curing temperature 10 degrees C. The bending curvature is 21 mm. The dye-doped LC gels open a new window for trim-able electronic papers, decorative displays, electrically switchable curtains, and electrically switchable sun control film for the automobiles, homes or commercial buildings.
A Polarizes-free Flexible Display Using Dye-doped Liquid Crystal Gels
(2008)
Lin, Yi-Hsin
;
Yang, Chih-Ming
;
Lin, Yan-Rung
;
Jeng, Shie-Chang
;
Liao, Chi-Chang
A reflective type polarizes-free flexible displays using a dye-doped liquid crystal (LC) is demonstrated due to combining both scattering and absorption. A polarizer-free multi-switch using gradient dye-doped LC gels is also demonstrated. Such a gel-like flexible displav is bendable and trimable. The potential applications are e-papers and decorative displays.
Flexible and reflective polarizer-free liquid crystal displays using dye-doped liquid crystal gels
(2008)
Lin, Yi-Hsin
;
Yang, Jhih-Ming
;
Jeng, Shie-Chang
;
Lin, Yan-Rung
;
Liao, Chi-Chang
A flexible and reflective polarizer-free display using dye-doped liquid crystal (LC) gels is demonstrated. The electro-optical performances of both scattering and absorption based dye-doped LC gels depend on curing temperatures. The dye-doped LC gel shows good reflectance similar to 55%, good contrast ratio similar to 450:1 and fast response similar to 6.5ms at curing temperature 10 degrees C when UV curing intensity is 2.6 mW/cm(2). The EO performance depends on the curing temperature. The hysteresis is independent of sampling time duration. The bending curvature is 21 mm. The response of dye-doped LC gels is faster under bending due to the bending-induced sheared force of polymer networks. The dye-doped LC gels open a new window for trimable electronic papers, decorative displays and switchable curtains.
Flexible and reflective polarizer-free liquid crystal displays using dye-doped liquid crystal gels - art. no. 691108
(2008-01-01)
Lin, Yi-Hsin
;
Yang, Jhih-Ming
;
Jeng, Shie-Chang
;
Lin, Yan-Rung
;
Liao, Chi-Chang
A flexible and reflective polarizer-free display using dye-doped liquid crystal (LC) gels is demonstrated. The electro-optical performances of both scattering and absorption based dye-doped LC gels depend on curing temperatures. The dye-doped LC gel shows good reflectance similar to 55%, good contrast ratio similar to 450:1 and fast response similar to 6.5ms at curing temperature 10 degrees C when UV curing intensity is 2.6 mW/cm(2). The EO performance depends on the curing temperature. The hysteresis is independent of sampling time duration. The bending curvature is 21 mm. The response of dye-doped LC gels is faster under bending due to the bending-induced sheared force of polymer networks. The dye-doped LC gels open a new window for trimable electronic papers, decorative displays and switchable curtains.
Polarizer-Free Gradient Dye-Doped Liquid Crystal Gels
(2009)
Lin, Yi-Hsin
;
Yang, Chih-Ming
;
Lo, Chun-Hsiang
;
Lin, Yan-Rung
;
Jeng, Shie-Chang
A multi-switch display using gradient dye-doped LC gels which is still polarizer-free, fast response (similar to 10ms in general), and high contrast (similar to 200:1 in general) has demonstrated. By controlling the spatial distribution of the density of polymer networks through fabrication process, gradient dye-doped LC gels can be a multi-switch. The gradient dye-doped LC gel is bright without applied voltage and is dark at a high voltage. It appears the colored pattern when LCs are partially reoriented due to the gradient density of polymer networks. The optical analysis of dye-doped LC gels is also discussed. The potential applications are flexible display and decorative displays.
Reflective type polarizer-free flexible displays using dye-doped nematic liquid crystal gels
(2008)
Lin, Yi-Hsin
;
Yang, Chih-Ming
;
Lin, Yan-Rung
;
Jeng, Shie-Chang
;
Liao, Chi-Chang
A polarizer-free flexible display using a dye-doped nemalic liquid crystal (LC) gel is demonstrated in reflective mode and transmissive mode. By mimicking the display principle of a paper, combing both scattering and absorption, such a bendable and trim-able LCD exhibits similar to 55% reflectance, similar to 450:1 contrast ratio in reflective mode, similar to 20:1 contrast ratio in transmisive mode, and 15 ms response time. A single pixel flexible reflective display using such dye-doped LC gels is also demonstrated under bending and cutting. The minimal bending radius of curvature is similar to 21 mm.