Papers by Keyword: Flat Panel Display

Paper TitlePage

Authors: Zi Qiang Huang
Abstract: Active matrices often related with high grade display devices, due to application of the storage elements, typically thin film transistor (TFT). Because of the complex procedures in the manufacturing TFT, investment of the high value manufacturing equipments and clarification plants is necessary, hence increasing the manufacturing cost of the flat panel, and more importantly, causing the pollution of water and air. As the contribution of TFT array merely exists in supplying storage function for the pixels of the display panel, large efforts have been made to find suitable cells that have bistable effect, so as to substitute the effect of TFT. As the bistable cell is just the storage pixel, one could construct a bistable cell to skip the needs of TFT active matrices. The paper is to introduce currently available bistable display devices in the following field: liquid crystal bistable displays with cholesteric liquid crystals, which is an example to introduce the bistable technology; iMod display devices based on mechanic induced bistable and light interference, which shows the possibility to construct bistable display; and the display based on solid powder movement in air or in vacuum, so called liquid powder displays, which shows how to improve the existed display.
206
Authors: Hong Hanh Nguyen, Ngoc Son Dang, Van Duy Nguyen, Kyungsoo Jang, Kyunghyun Baek, Woojin Choi, Jayapal Raja, Junsin Yi
Abstract: Nonvolatile memory (NVM) devices with nitride-nitride-oxynitride (NNO) stack structure using Si-rich silicon nitride (SiNx) as charge trapping layer on glass substrate were fabricated. Amorphous silicon clusters existing in the Si-rich SiNx layer enhance the charge storage capacity of the devices. Low temperature poly-silicon (LTPS) technology, plasma-assisted oxidation/nitridation method to form a uniform ultra-thin tunneling layer, and an optimal Si-rich SiNx charge trapping layer were used to fabricate NNO NVM devices with different tunneling thickness 2.3, 2.6 and 2.9 nm. The increase memory window, lower voltage operation but little scarifying in retention characteristics of nitride trap NVM devices had been accomplished by reducing the tunnel oxide thickness. The fabricated NVM devices with 2.9 nm tunneling thickness shows excellent electrical properties, such as a low threshold voltage, a high ON/OFF current ratio, a low operating voltage of less than ±9 V and a large memory window of 2.7 V, which remained greater than 72% over a period of 10 years.
307
Authors: Hyun Suk Kim, Joon Seok Park, Tae Sang Kim, Kyoung Seok Son, Jong Baek Seon, Seok Jun Seo, Sun Jae Kim, Sun Hee Lee, Eok Su Kim, Myoung Kwan Ryu, Seung Wu Han, Seong Ho Cho, Young Soo Park
Abstract: The fabrication of thin-film transistor devices incorporating active semiconductors based on zinc oxynitride (ZnON) compound is presented. It is demonstrated that the addition of appropriate dopant, gallium, in ZnON, suppresses the formation of shallow donor, nitrogen vacancies, and significantly improves electrical characteristics of the resulting TFT. The Ga:ZnON devices with field-effect mobility values exceeding 50 cm2/Vs are achieved, which makes them suitable as switching or driving elements in next-generation flat-panel displays.
446
Authors: Myung Jin Chung
Abstract: The transfer robot using for small flat panel display manufacturing process is developed. Requirement for transfer robot such as minimization of deflection and lateral vibration is achieved by enhancement of stiffness of arm and hand by finite element analysis. Arrangement of reduction gear is designed to increase stiffness and decrease position error at the end point of arm. The repeatability of arm is improved by applying the precision control method. Experiment is conducted to verify the performance of developed transfer robot. From the performance test, developed transfer robot has repeatability of under ±0.1mm, deflection of 2mm, straightness of under ±1.5mm, and velocity of 1500mm/sec.
1146
Authors: Yoon Suk Chang, Hyuk Soo Chang, Jae Boong Choi, Young Jin Kim, Poong Hwan Chun, Jae Youn Kong
Abstract: The purpose of this paper is to investigate fluid characteristics and flat panel display behaviours on contact-free flat panel display handler nozzles. Since air force distributions streaming bottom surface of a flat panel display highly dependent on operating as well as design conditions and configuration of contact-free handler nozzle, influences of various parameters such as flow rate, supply air pressure, floating height are examined through a series of computational fluid dynamics analyses. Moreover, dynamic finite element analyses of the flat panel display are carried out to assure that an oscillation effect caused by disturbances is not significant. Key findings from the both computational fluid dynamics and structural integrity analysis results are presented and discussed, which can be figured out an optimized operating condition of contact-free handler nozzles.
1089
Authors: Yoon Suk Chang, Dae Geun Cho, Sang Min Lee, Jae Boong Choi, Young Jin Kim, Poong Hwan Chun, Jae Youn Kong
Abstract: The purpose of this paper is to investigate principles of levitation and restitution of blowing nozzle prior to fabricating a prototype of air handling system. Since air force distributions streaming bottom surface of a flat panel display (FPD) highly dependent on operating as well as design condition and configuration of air handling system, influences of various parameters such as flow rate, supply air pressure, floating height and tilted angle are examined through a series of computational fluid dynamics (CFD) analyses. Moreover, dynamic finite element analyses of the FPD are carried out to assure that an oscillation effect caused by disturbances is not significant. Key findings from the both CFD and structural analysis results are presented and discussed, which can be utilized as technical bases for development of the practical air handling system.
2483
Authors: Hiroshi Goto
Abstract: Nanoimprint process is a simple and a low cost micro/nano fabrication method based on mold replication principle. Various kinds of applications such as optical devices for flat panel displays or electronic papers, patterned medias, bio-medical devices and electronics devices using nanoimprint process are expected. In the past a decade, many researches and developments on the process, the tool, the application relating to nanoimprint were carried out and partly commercialized. In this paper, overview on nanoimprint technology including recent progress is described. And important issues to be solved and solution idea for industrialization of nanoimprint process are pointed out. Also, our recent R&D activities on nanoimprint tool and process, which are UV/thermal nanoimorint tool and process, roll to roll type imprint system are introduced.
1073
Authors: Xiu Zhi Xu, Yong Mao Feng, Shu Fan Wang, Ping Juan Niu
Abstract: Non-uniformity of luminance for big screen of LED flat panel display is one of problems affecting its display qualities, but existing widely. This paper analyzes the influences of luminance non-uniformity on LED display images, gives a plan on luminance uniformity correction based on CCD, and then proceeds correction algorithm of correction technology, at last conducts luminance non-uniformity correction for LED flat panel display from brightness datum of CCD image processing, which gives results and analysis before and after correcting.
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