Dongwha Pharm. Ind. Co., Ltd.

Other

Boe Hydis Technology Co., Ltd.

Dong Wha Pharm. Co., Ltd.

Dong Wha Pharmaceutical Ind. Co., Ltd.

Ubi Sound Co., Ltd.

Sang Jin Park

Yong Kyun Park

Sang Wook Lee

Jong Woo Kim

Hee Jeoung Park

Sung June Yoon

Nam Doo Kim

Sung Joon Yoon

Geun Hyung Lee

Hyeong Su Sim

Hwan Bong Chang

Yong Hun Cho

Yong Ho Chung

Young Yik Ko

Hwan Bong Jang

Wang Yong Yang

Jae Jin Han

Dong Hyuk Shin

Dong Hyuk Sin

Je In Yoon

Jae In Yoon

Yong Huh

Yun Do Kim

There is provided a method and apparatus for output pulse width modulation in a digital amplifier including: a determining step of adding or subtracting a value corresponding to a predetermined offset to or from an input audio signal alternately according to a period of the input audio signal, thereby determining a sign of a resulting value of adding or subtracting; a switching step of outputting the input audio signal to a first port based on the determined sign, or outputting the input audio signal to a second port after inverting the input audio signal into a positive number; an adjusting step of adding a value of a predetermined switching time to the audio signals output from the first port and the second port, and outputting a resulting value of adding; and a modulating step of performing pulse width modulation on the audio signals output from the adjusting step and outputting a first modulation signal and a second modulation signal.

Method and apparatus for pulse width modulation in a switching amplifier

Disclosed is a liquid crystal display panel. The liquid crystal display panel includes an active region formed at an upper surface thereof with a plurality of gate lines and data lines aligned in cross to each other, in order to display image data applied to the data lines, a plurality of gate pads formed at a first outside of the active region and connected to each of the gate lines, a plurality of data pads formed at a second outside of the active region and connected to each of the data lines, and a pair of anti-electrostatic thin film transistors formed at each gate pad and each data pad, respectively, in order to carry out functions of inner and outer ESDs and to transfer static electricity generated from a corresponding pad to an adjacent pad. Due to the anti-electrostatic thin film transistors formed at each pad, an extra space for forming additional EDSs is not necessary, thereby minimizing a space occupied by the ESDs and maximizing a space section of the liquid crystal display panel.

Liquid crystal display panel

The present invention relates to novel 5-pyrimidinecarboxamide derivatives and the pharmaceutical compositions containing said derivatives, and more specifically, to 5-pyrimidinecarboxamide derivatives and their pharmacutically able salts, the process for preparing them, and the pharmaceutical compositions containing said compounds as active ingredients. In particular, said 5-pyrimidinecarboxamide derivatives of the present invention, due to their inhibitory activity against the proliferation of human immunodeficiency virus (HIV) as well as hepatitis B virus (HBV), can be used as a therapeutic agent as well as a preventive agent for hepatitis B and acquired immune deficiency syndrome (AIDS).

5-pyrimidinecarboxamide derivatives and the pharmaceutical compositions containing said derivatives

The present invention relates to novel 3-nitropyridine derivatives, pharmaceutically acceptable salts thereof and pharmaceutical compositions containing the same as active ingredients. Methods of preparing the derivatives and pharmaceutical compositions containing the same are also disclosed. The 3-nitropyridine derivatives of the present invention, due to their inhibitory activity against the proliferation of human immunodeficiency virus (HIV) as well as hepatitis B virus (HBV), can be used as therapeutic agents as well as preventive agents for hepatitis B and acquired immune deficiency syndrome (AIDS).

3-nitropyridine derivaives and the pharmaceutical compositions containing said derivatives

Anti-viral agents of formula (1) have been identified. Their preparation method is described. These 2,5-pyridinedicarboxylic acid derivatives or their pharmaceutically acceptable salts are useful in countering the proliferation of viruses such as hepatitis B virus and human immunodeficiency virus.

2,5-pyridinedicarboxylic acid derivatives

The present invention relates to novel terephthalamide derivatives and in particular to novel terephthalamide derivatives of the following formula 1, its pharmaceutically acceptable salts as antiviral agents having remarkable inhibitory actions against the proliferation of various viruses including HIV and HBV, and preparing method thereof ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the detailed description of the present invention.

Terephthalamide derivatives

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Seoul, South Korea

Sang Jin Park