• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.893-895
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• 2009

In this paper, we described the unique and novel method to prepare two kinds of electro-active particles, black and white particles with different polarity. The surface of the particles was characterized to be uniform and clean by adopting spray dryer as a tool for genesis of particles; neither surfactants nor high dielectric medium like water was employed during particle preparation step. The other purpose of this study is to investigate the factors that contribute high driving voltage of particlebased display like QR-LPD. We extracted parameters interaction between particle and electrode, and between oppositely charged particles. Here we reported an excellent behavior of particle-based display that showed low operating voltage, high contrast ratio as high as 8:1 without scarification of quick response time. By optimizing the particle size, charge per mass, selection of external additive sets, a lower driving voltage as low as 40V for the particles with $10{\mu}m$ volume average diameter was obtained.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.221-224
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• 2009

New type simple, thin and flexible display unit with an exchangeable image-sheet coupled with a thin film light waveguide illuminated by color LEDs is proposed It displays the still picture like an e-paper, and the imagesheet with grooves formed by the PC and the cutting plotter can be easily replaced by another one.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.236-240
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• 2005

The commercialization of an active matrix e-reader display using E Ink microencapsulated electrophoretic (MEP) ink marked a big step towards comfortable reading over an extended period of time in an electronic book, as the high resolution display, jointly realized by Philips, E Ink and Toppan, has a true paper-like look and feel. Alternative electrophoretic material systems are being developed by SiPix and Bridgestone and progress has been made in the past two years. In this paper, electrophoretic material systems are briefly reviewed, after which the perspectives and challenges of electrophoretic displays are addressed and methods for generating gray tones are presented and discussed.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.28 no.8
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• pp.524-530
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• 2015

We propose a three-electrode type electronic paper display and its fabrication process to realize single color at the same display panel. We establish a fabrication process with the mixing of electronic ink, loading of this ink, electronic ink assembly, packaging and driving. Also, we discuss an operating principle of this panel and the induced image reversal phenomenon by electric field area of the lower electrodes. This phenomenon is not occurred for the panel having $10{\mu}m$ electrode space. By this pixelation structure like this three-electronic paper display, a single color realization without color filter is possible and various kind of color is defined by a dye selection for charged particles and electrically neutral fluid.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.832-835
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• 2005

Organosilicate Glass has quite a long history in the Semiconductor industry but has received very limited evaluation for Display industry applications. In this paper, we would like to introduce several kinds of Organosilicate Glasses for Display applications.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.1290-1294
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• 2004

Exposure System is used for printing a prescribed pattern on a printed board, a liquid crystal substrate or the like. In this paper we are trying to develop projection Optics Exposure System for manufacturing Color Filter of LCD Display. This paper explain the Projection Optics Design and Illumination Optics Design of Color Filter Exposure system.

• Proceedings of the IEEK Conference
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• 2003.07b
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• pp.1149-1152
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• 2003

Now a days, many different kinds of display technologies such as Liquid Crystal Display (LCD), Organic Light Emitting Diode (OLED), and Liquid Crystal On Silicon (LCOS) are designed. And these display technologies will be used in many application products like High Definition Televisions (HDTVs) or mobile devices. In this paper, pattern generation circuit for display test is proposed. The proposed circuit will be embedded in the control circuit of display chip. Two differenct kinds of patterns is generated by the circuit. One is block pattern for color test, and the other is line pattern for pixel test. The shape of test pattern is determined by the values of registers in pattern generation circuit. The circuit is designed using Verilog HDL RTL code.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.4
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• pp.565-569
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• 2014

Recently, various kinds of new computer controlled devices have been introduced in a wide range of areas, and convenient user interfaces for controlling the devices are strongly needed. To implement natural user interfaces(NUIs) on top of the devices, new technologies like a touch screen, Wii Remote, wearable interfaces, and Microsoft Kinect were presented. This paper presents a natural and intuitive gesture-based model for controlling contents of LCD display. Microsoft Kinect sensor and its SDK are used to recognize human gestures, and the gestures are interpreted into corresponding commands to be executed. A command dispatch model is also proposed in order to handle the commands more naturally. I expect the proposed interface can be used in various fields, including display contents control.

• The Journal of the Korea Contents Association
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• v.9 no.6
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• pp.117-125
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• 2009

In this paper, we propose user-centric immersible and interactive electronic book based on the interface of tabletop display. Electronic book is usually used for users that want to read the text book with multimedia contents like video, audio, animation and etc. It is based on tabletop display platform then the conventional input device like keyboard and mouse is not essentially needed. Users can interact with the contents based on the gestures defined for the interface of tabletop display using hand finger touches then it gives superior and effective interface for users to use the electronic book interestingly. This interface supports multiple users then it gives more diverse effects on the conventional electronic contents just made for one user. In this paper our method gives new way for the conventional electronics book and it can define the user-centric gestures and help users to interact with the book easily. We expect our method can be utilized for many edutainment contents.

• Journal of the Semiconductor & Display Technology
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• v.1 no.1
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• pp.29-33
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• 2002

In the flip-chip process, the problem like electric defect or fatigue crack caused by the difference of CTE, between chip and substrate board had occurred. Underfill of flip chip to overcome this defects is noticed as important work developing in whole reliability of chip by protecting the chip against the external shock. In this paper, we introduce the underfill methods using mold and plunge and improvement of process and reliability, and the advantage which can be taken from embodiment of device.