Abstract We present a novel all‐phosphorescent AMOLED pixel architecture with a red, green, light blue and deep blue sub‐pixel design. The highly efficient light blue reduces power consumption by 33% compared to an equivalent conventional RGB display using a fluorescent blue sub‐pixel. Furthermore, by using a light and deep blue sub‐pixel layout, the lifetime of the display will be significantly increased due to the reduced on‐time required for the deep blue sub‐pixel. Here we demonstrate this new design in a 2.5‐inch AMOLED panel.
This paper reports the method of preparing 4-pole-oriented anisotropic bonded NdFeB magnet and presents an application to a small size dc motor. The influence on the magnet performance in terms of alignment magnetic field intensity, powder filling density, and the temperature of compression mold tools are investigated. The design and optimization of the magnet and motor were done with the aid of electromagnetic field analysis based on the finite element method. Experimental results with a designed dc motor adopting the developed anisotropic bonded NdFeB magnet show 50% reduction of weight and volume.
Abstract A novel LTPS method called MICC (metal‐induced crystallization using a cap) is introduced. The role of cap layer on a‐Si is the control of the nickel concentration for inducing crystallization as well as the passivation of the surface during thermal process for crystallization. Circular grain growth can be seen, due to lateral grain growth from a seed. Polycrystalline silicon with large grain and smooth surface can be achieved by MICC. We fabricated a AMLCD with high aperture ratio of 80 % using silicon‐based spin‐on low‐K dielectrics as a planarization layer.
유리중공구체(hollow glass microsphere, HGM)는 중공을 가지는 무기 충전제로 고무 복합체에 적용될 경우 경량화라는 장점이 있지만 기계적 특성을 저하시킨다는 단점이 있다. 따라서 고무와의 결합을 향상시키기 위해 유리중공구체의 계면 특성을 향상시키기 위한 다양한 연구가 진행되고 있다. 이러한 연구 중 본 연구에서는 다양한 종류의 실란 커플링제로 유리중공구체의 표면을 개질시키는 방법에 대해서 살펴보았다. 실란 커플링제(silane coupling agent)는 2개 이상의 다른 반응기를 가져 유기질 재료와 무기질 충전제간 화학적 결합을 형성하는 재료이며, 분자내 기능성기에 따라 다양한 종류가 존재한다. 표면 개질 특성을 FTIR 및 SEM을 통해 살펴보았다. 그리고 개질된 유리중공구체를 이용하여 고무복합체를 제조하여 유변학적, 기계적 및 형태학적 특성을 평가하였다. 그 결과, 표면개질된 유리중공구체가 들어간 고무 복합체의 기계적 물성 및 고무와의 상용성이 우수하게 나타났으며, 이는 계면특성이 증대되어 고무와의 상용성 및 분산성을 향상시킨 것으로 판단된다.
In order to select polymer matrix for MIF (Molded-In Foaming) process, in this study, we investigated rheological properties of commercial polymers, SBC (Styrene-Butadiene Copolymers, K-resin KK38) and SBS (StyreneButadiene-Styrene, KTR 101 and KTR 301). In time sweep test, the rheological properties (Gᐟ, Gᐥ, η*) of SBS at 155 and 170 C display almost constant value as a function of time from 0 s to 1800 s. On contrast, the rheological properties of SBS at 185 and 200 C exponentially increase as a function of time. It could be due to gelation of SBS at high temperature conditions. These increment of rheological properties are not observed in SBC. From LAOS (large amplitude oscillatory shear) test, the nonlinear rheological properties of SBS at 155 and 200 C after 1800 s are compared. The nonlinear rheological properties at 155 C show simple strain thinning behavior such as linear homopolymer, however, the nonlinear rheological properties at 200 C show 2 times strain thinning behavior (Payne effect). It well match with the gelation of SBS at 200 C. From rheological studies, it is confirmed that the proper polymer matrix for MIF process (low rheological properties at initial time and high rheological properties after process) is SBS KTR 301.
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