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Experimental study on reactive switch by using piezoelectric devices
Yuuki Takehana,Kazuyuki Kobayashi,Tomoyuki Okubo,Yousuke Kurihara 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The keyboard switch is an important for today’ advanced systems. This paper proposes a new type of emulated reactive keyboard switch by using piezoelectric devices. The proposed reactive switch consists of two elements of piezoelectric devices that sensed and actuated by DSP micro controller. We investigate how each reaction force of switches effects to the touch feeling via sensory test. According to results of feeling test, we develop an actual reactive switch for demonstrating reaction force. Validity of proposed reactive switch is verified by actual experimental tests.
A New Field Sequential Stereoscopic LCDs by use of Dual-Directional-Backlight
Yuuki, A.,Agari, M.,Iwsaki, N.,Sasagawa, T.,Tahata, S.,Satake, T.,Murakami, O.,Oda, K.,Ito, A.,Miyake, S. The Korean Infomation Display Society 2004 Journal of information display Vol.5 No.2
We have developed the Scan-backlight Stereoscopic LCD that is a kind of field-sequential -Stereoscopic LCD combining the Dual- Directional- Backlight and the fast-response OCB panel. The Dual-Directional-Backlight using a double-sided prism sheet can change the direction of light by switching the LED light sources. The OCB panel using Feed-Forward Drive can realize frame rate of 120 Hz. As a result, the Scan-backlight Stereoscopic display works at its original resolving power, and produces flicker-free stereoscopic images. This auto- stereoscopic display can resolved the problems of the double images and the pseudoscopic images in case of watching at oblique angles.