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Development of a 97.5-inch Super Hi-Vision 8K × 4K liquid crystal display panel
Yanping Liao,Xibin Shao,Jianfeng Yuan,Xiqing Zhang,Ji Zhang,Changlin Leng,Yinglong Huang,Seongkuy Lee 한국정보디스플레이학회 2015 Journal of information display Vol.16 No.3
A prototype 97.5-inch 8K×4K a-Si liquid crystal display (LCD) panel for Super Hi-Vision with ultra-high definition was successfully developed using the BOE exclusive advanced super-dimensional switching technology. This LCD has a panel with 7680(×3) by 4320 pixels, 16 times those of the conventional Full High Definition (FHD), and the pixel size of the panel is 0.2811mm (90.4 pixels per inch). The liquid crystal charging time was extended by quad area and double source line structure (also called “2G2D driving”). Additionally, a multi-functional image-processing video board was developed to compatibly realize the real-time display of huge image data from FHD to 8K. Furthermore, the reason for the arcing that occurred in half-tone source–drain mask etching was discussed and was ultimately solved by improving the exposure process. The demonstrated panel features a 1200:1 contrast ratio, 500 nit brightness, and 72% color gamut.
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Tse-kang Leng,Nien-chung Chang Liao 인하대학교 국제관계연구소 2016 Pacific Focus Vol.31 No.3
This article examines Taiwan’s new hedging policy toward China and its evolving relations with Japan. Taiwan under President Ma Ying-jeou focused on hedging its bets against China’s rise through engagement, accommodation, and soft balancing. Meanwhile, Taipei and Tokyo are also forging a strategic partnership as they cautiously achieve low-commitment agreements for deeper cooperation, including signing an important fisheries agreement. Nevertheless, both international and domestic challenges may constrain the flexibility of Taipei’s hedging strategy. Given the uncertainty and complexity in East Asia, Taipei will continue its hedging strategy as a way to expand its external cooperation in the region.
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Zhen Wang,Jianting Zhou,Leng Liao,Jinquan Zhang,Huabin Zhang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.2
To solve the problem of bridge surface cracking caused by an uneven temperature field inside and outside the web of a concrete box structure, an automatic temperature control device applied to the beam surface of a concrete box bridge in the daytime is developed. The device, hanging on the surface of the box girder webs, consists of a radiation cooling coating and a composite shape-stabilized phase change material. With reference to a bridge in Guizhou Province, finite element analysis, short-term temperature monitoring and temperature-drop monitoring are carried out using the device. The result shows that the automatic temperature control device works well continuously. For a box girder without an automatic temperature control device, the inside and outside of the web demonstrate different sensitivities to the temperature of the external environment, with a high temperature fluctuation and a relatively high temperature stress. For a box girder with an automatic temperature control device, as the cooling coating reflects part of the solar radiation and the phase transformation of the composite shape-stabilized phase change material releases or absorbs part of the latent heat to or from the external environment, the temperature fluctuation and temperature stress of the inside and outside of the web are relatively small. When the temperature suddenly drops, the automatic temperature control device works better than under conventional weather conditions because it can reduce the external temperature by approximately 50% on the outer surface of the box girder webs.
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Yinghao Qu,Jianting Zhou,Renming Liu,Leng Liao,Qingyuan Zhao 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.3
For large section members such as cables, there are insufficient methods for circumferential scanning along the cable sections for the detection of corroded broken wires. In this study, a detection method for broken wire damage (BWD) along the circumferential direction of cable based on the principle of self-magnetic flux leakage (SMFL) was proposed. First, the theoretical calculation model and the finite element model of the circumferential magnetic field in the polar coordinate system were established. The analysis results showed that the position of the BWD on the section of cable could be effectively judged by the concave position of the curves of the SMFL in the polar coordinate system. Through the circumferential scanning at different positions, the length of the BWD could be judged by the coordinates of x when the value of index “C” (similarity to circle) approached 1 for the first time in the x - C curves. Finally, the detection experiment for the BWD of a parallel wire bundle was carried out. The experimental results were consistent with the analysis results for the theoretical model and the finite element, and the experimental results verified the correctness of the detection method.
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