• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.409-412
• /
• 2006

A high data accuracy and low power consumption driving method and output stage of the source driver are proposed for the LTPS TFT-LCD in mobile applications. The proposed driving method is insensitive to the variations of the electrical characteristics of TFTs, which enables the output errors of the source driver are under 1/2 LSB in all gray levels. In addition, the power consumption of the driver with the method is decreased to 9.9mW which is 55.9% of that of the conventional source driver by reducing unnecessary charge waste.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2003.07a
• /
• pp.32-35
• /
• 2003

Nonlinear parameterization of OLED device from measurements of bias dependence of impedance spectra and parameter extraction using Levenberg-Marquardt complex nonlinear least square regression algorithm based on resistor-capacitor equivalent circuit model enables computer simulation of OLED power driving characteristics in forms of square-wave or sinusoidal output signal at arbitrary conditions. We introduce developed OLED power driving simulation software and discuss transient responses in voltage-or current-controlled operations as well as nonlinear characteristics of OLED, by presenting both the simulation and experimental results. This OLED simulation technique using impedance spectroscopy is extremely useful in predicting performance of the nonlinear device, especially in time-domain analysis of device operation.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.1255-1258
• /
• 2006

PM OLED has the line-disturbance when eyes can detect the driving line status in the shaking situation. It is closely related with the lighting intensity and the lighting time during the line driving. .In this paper we suggest the frame part method for eliminating lineflash appearance. Frame part is a driving method of PM OLED, which divides one frame into several inner-frame parts to reduce the color interference between closely related pixels and to lessen the lineflash appearance which disturbs viewer to perceive the images. Frame part groups one frame into several inner-frame parts and have inner-frame rate higher than the frame rate. Frame part could be used in most of applications in PM OLED systems to enhance the total performance of screen quality.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2002.11a
• /
• pp.326.2-326
• /
• 2002

A PDP(Plasma Display Panel) module consists of a discharge panel, a SMPS for power supply, driving boards for panel control, and a logic board. Driving boards supply high voltage pulses to induce glow dischargein the PDP panel. The electrical pulses excite the circuit elements and subsequentlyacoustic noises. The main sources of the noise in the circuit are the transformer of SMPS and the power MOSFET of driving boards, and the heat sinks often amplify the noise level. (omitted)

• Journal of Institute of Control, Robotics and Systems
• /
• v.5 no.7
• /
• pp.848-854
• /
• 1999

In this paper, we designed and implemented a precise pulse motor controller chip that generates the pulse needed to control step motor, DC servo and AC servo motors. This chip generates maximum pulse output rate of 5Mpps and has the quasi-S driving capability and speed and moving distance override capability during driving. We designed this chip with VHDL and executed a logic simulation and synthesis using Synopsys tool. The pre-layout simulation and post-layout simulation was executed by Compass tool. This chip was produced with 100 pins, PQFP package by 0.8${\mu}{\textrm}{m}$ gate array process and implemented by completely digital logic. We developed the test hardware board of performance and the CAMC(Computer Aided Motor Controller) Agent softwate to test the performance of the pulse motor controller chip produced. CAMC Agent enables user to set parameters needed to control motor with easy GUI(Graphic User Interface) environment and to display the output response of motor graphically.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.28 no.8
• /
• pp.518-523
• /
• 2015

We fabricate a single particle-microcapsule type electronic paper using electrophoresis, which is different with a reported dual particle-microcapsule type and of which electro-optical researches are not reported. So we analyzed a basic properties, such as reflectivity, response time, and driving voltage. Our display panels having various cell-gaps of $30{\mu}m$, $34{\mu}m$, $38{\mu}m$, $42{\mu}m$, and $46{\mu}m$ are inspected. As a results, a driving voltage is defined to 10 V and desirable cell-gap is $30{\mu}m$ or $34{\mu}m$. Considering a mechanical strength, the optimum cell-gap is $34{\mu}m$ for the single particle type electronic paper.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2002.08a
• /
• pp.876-879
• /
• 2002

A novel driving technology of PDP, which enables to decrease the sustain voltage of conventional technology by half without lowering the gas discharging voltage. This technology, realizable without much increased cost of the semiconductor devices, gives a significant improvement in the power efficiency, essential for the design of a drive circuit for PDP. A comparative analysis and experimental results are presented to show the validity of the proposed driving technology.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2002.08a
• /
• pp.65-68
• /
• 2002

A new driving scheme is proposed to improve the color purity by reducing the neon (Ne) emission of 585 nm in an ac PDP. Applying the new driving scheme to the address electrodes during a sustain-period induces a new discharge mode that can reduce the Ne emission remarkably. For this new discharge mode, the change in the Ne emission intensity including the discharge characteristics is measured and the corresponding mechanism is also analyzed. As a result, it is found that a color gamut area is expanded by approximately 9.2 % in comparison with a conventional case.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07a
• /
• pp.81-84
• /
• 2005

A prototype of 25-inch SMPDP module had been developed by the end of 2004. Most driving technologies succeeded to those of the previous 34-inch SMPDP module .In this work, we make an optimization effort on the driving waveforms, especially for setup period. Long ramp waves show good wall voltage controllability, with which we can get a reliable addressing and better sustain stability.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07a
• /
• pp.653-656
• /
• 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 $25{\mu}s$.