Kyu-Young Kim

Interactive racing game with graphic and haptic feedback

This paper proposes a mobile racing game prototype system where a player haptically senses the state of a car and the road condition with a vibrotactile signal generation method. The vibrotactile signal generation method provides variable vibrotactile effects according to a users interaction with the graphic environment. The generated vibrotactile effects are used for the input of an eccentric vibration motor and a solenoid actuator in order to convey vibrotactile information with a large bandwidth to the players. To evaluate the proposed racing game, six persons experience two kinds of racing game; one with vibrotactile feedback, the other without vibrotactile feedback. The experiment shows that the proposed game with vibrotactile feedback provides players with increased levels of realism and immersion.

Analysis of refining of aluminum using fractional solidification with forced convection

Segregation of iron atoms during refining of aluminum using the fractional solidification technique has been analyzed. The redistribution of the solute atoms was influenced by the solidification and solid/liquid interface tangential velocities. Aluminum purity increased with decreasing solidification velocity and increasing tangential velocity. The diffusion boundary thickness was inversely proportional to the square root of the tangential velocity in the cylindrical rotating system. Effects of the tangential and solidification velocities on the effective redistribution coefficient were investigated. The calculated refining curves were in good agreement with measured values.

Fabrication of an all‐layer‐printed TFT‐LCD device via large‐area UV imprinting lithography

Abstract Nanoimprint lithography (NIL) using ultraviolet (UV) rays is a technique in which unconventional lithographic patterns are formed on a substrate by curing a suitable liquid resist in contact with a transparent patterned mold, then releasing the freshly patterned material. Here, various solutions are introduced to achieve sufficient overlay accuracy and to overcome the technical challenges in resist patterning via UV imprinting. Moreover, resist patterning of all the layers in TFT and of the BM layer in CF was carried out using UV imprinting lithography to come up with a 12.1‐inch TFT‐LCD panel with a resolution of 1280×800 lines (125 ppi).