• Proceedings of the IEEK Conference
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• 2000.06e
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• pp.179-182
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• 2000

We have proposed a new driving method of AC PDPs for high resolution and high luminance, in which address pulses shorter than 1 $\mu$sec and increase address time, make it possible to drive 2100 scan lines The proposed driving scheme also allows high sustain frequency, leading to improved luminance. The experiment with a 4-inch color AC PDP with 30$\times$58 pixels realized a high luminance of 850cd/$m^2$ when the sustain voltage of 140v with the frequency of 125KHz is applied to the panel, and showed the possibility of the proposed driving scheme for high luminance and high resolution AC PDPs with 2100 lines.

• Journal of Convergence for Information Technology
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• v.9 no.5
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• pp.27-33
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• 2019

Various technical and societal approaches are being made to realize the auto driving (AD) and cooperative driving (CD) including communication network and extended advanced driver support system is under development. In CD, it is important to share the roles of the driver and the system and to secure the stability of the driving, so a efficient interface scheme between the driver and the vehicle is required. This study proposes a research model including driver, system and driving environment considering the role and function of driver and system in CD. An efficient interface between the driver and the vehicle to cope with various driving situations on the CD using the analysis of the driving environment and the research model is also proposed. Through this study, it is expected that the proposed research model and interface scheme could contribute to CD system design, cockpit module development and interface device development.

• Proceedings of the KIPE Conference
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• 2000.07a
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• pp.651-656
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• 2000

This paper describes the optimal sizing of each component using computer simulation and presents the efficient operating scheme of series HEV using hardware simulator the equivalent system. As the sizing method of components have been experimental and empirical it is needed to spend much time and development cost. however the results of computer simulation will set the optimal sizing of components in short time. There are two type of driving control power-tracking mode and load-levelling mode in series HEV. This paper presents that series HEV be operated in the load-levelling mode which is more efficient that power-tracking mode.

• Proceedings of the KIPE Conference
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• 1998.10a
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• pp.464-469
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• 1998

In the conventional wire feeder drives of welding machine, one thyristor or MOSFET device was used for half-wave phase control circuit and direct EMF measurement was used for sensing the wire feed rate. But the method using one switching device has poor response for sudden disturbance and it has latent speed ripple. It can affect some welding performance such as spatter generation and irregular bead formming. Therefore, the welding performance using full-bridge PWM speed control scheme was compared with conventional driving scheme was compared with conventional driving scheme and experimented in this paper. The results of experiment confirm the posibility of welding performance improvement by proposed constant speed control scheme in wire feeding drive of welding machine.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.3 s.96
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• pp.128-135
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• 1999

A driving simulators of aircraft and vehicle may consist of hydraulic power systems with many single-rod cylinders. The single-rod hydraulic systems are convenient but need more robust control scheme in order to achieve a reliable performance against the wide range of operating disturbances and the inherent model uncertainties. $H_{\infty}$ control scheme was implemented to the 2 degree-of-freedom hydraulic device similar to the simple driving simulator. With the reasonable disturbances from sensor, base and pump and also with the linearization of model, the simulation and experimental results showed good agreements.

• Proceedings of the KIEE Conference
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• 2000.07b
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• pp.681-683
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• 2000

This paper presents to find suitable driving voltage source for moving-coil-type linear oscillatory actuator(LOA). Thus, we construct control system and proposed three type driving voltage source. This scheme demonstrated experiments. Then, we find suitable driving voltage source for LOA.

• Journal of KIISE:Computing Practices and Letters
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• v.6 no.6
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• pp.628-634
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• 2000

We propose a data coding scheme for reducing' power consumption and ElVII in transmitting a sequence of data from LCD controller to LCD driver. The proposed coding scheme makes use of reducing data transitions in general text image of PC. It can be implemented with a little hardware and applied to the real-time applications of LCD driving system. We have executed computer simulations of the proposed coding scheme and compared the results of the proposed scheme with those produced by the existing coding schemes. The proposed coding scheme, compared to the existing ones, reduces the switching activity significantly in both of text and picture images.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.52 no.6
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• pp.267-273
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• 2003

The plasma display panel with the electrode structure of new discharge AND gate and its driving scheme were proposed and the driving system for experiment was developed. And operation of these discharge AND gate was verified by the experiment of PDP addressing with floating electrode. This discharge AND gate operated by the operation speed of 8$mutextrm{s}$ and the operation margin of 100V. The address operation margin of 10V also obtained. It was known to be able to control the discharge of the adjoining scan electrode accurately. Because proposed method uses the DC discharge the control of the discharge can be facilitated compared with conventional discharge AND gate. Moreover, because the input discharge and the output discharge of discharge gate are separate, the display discharge can be prevented from passing discharge gates. Therefore, it is possible to apply to the large screen plasma display panel. And the decrease of contrast ratio does not occur because the scanning discharge does not influence the picture quality.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.121-122
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• 2000

The understanding of reset scheme is essential for the driving of AC PDP (Plasma Display Panel). The characteristics of reset period of AC PDP was examined with the variation of pulse time and voltage in the ADS (Address Display Separated) driving method presented by Fujitsu,. The addressing characteristics showed drastic change as a function of the erasing time and addressing pulse width. In this paper, these results were explained by the change of wall charge variation, and it was estimated with the currents through each electrode.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.653-656
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• 2005

New charge-recycling structure and driving scheme for TFT-LCD source-driver IC application are proposed. The number of additional switches for the charge recycling is greatly reduced. An experimental prototype 6-bit source driver with five-level seven-phase charge recycling implemented in a $0.35-{\mu}m$ CMOS technology demonstrates that the quiescent current is only 3.1 mA, dynamic power saving is 75 %, and the settling time, which includes the charge-recycling and data driving, is within 25 $25{\mu}s$.