Abstract: Provided is a DC/DC converter which has a full bridge configured in a switching unit and uses a half bridge, which is subordinate to the full bridge in view of circuit configuration, to automatically select such one of the multi-topologies. More particularly, the DC/DC converter uses multi-topologies, which receives, in real time, feedback of an output voltage charged to a battery, operates using the half bridge when the output voltage charged to the battery is lower than a reference voltage, and operates using the full bridge when the output voltage charged to the battery is equal to or higher than the reference voltage, so as to output a wider range of voltage.

Abstract: The present invention relates to a DC/DC converter which has a full bridge configured in a switching unit and uses a half bridge, which is subordinate to the full bridge in view of circuit configuration, to automatically select such a multi-topology. More particularly, the present invention relates to a DC/DC converter using a multi-topology, which receives, in real time, feedback of an output voltage charged to a battery, operates using the half bridge when the output voltage charged to the battery is lower than a reference voltage, and operates using the full bridge when the output voltage charged to the battery is equal to or higher than the reference voltage, so as to output a wider range of voltage.

Abstract: Disclosed are an in-cell touch liquid crystal display (LCD) apparatus having a pixel electrode top structure and a method of manufacturing the same. The in-cell touch LCD apparatus is implemented in the pixel electrode top structure, thereby preventing color mixing between red, green, and blue pixels. The method of manufacturing the in-cell touch LCD apparatus decreases the number of masks necessary to manufacture a TFT array substrate, thereby reducing a manufacturing time and the manufacturing cost.

Abstract: Disclosed are an in-cell touch liquid crystal display (LCD) apparatus having a pixel electrode top structure and a method of manufacturing the same. The in-cell touch LCD apparatus is implemented in the pixel electrode top structure, thereby preventing color mixing between red, green, and blue pixels. The method of manufacturing the in-cell touch LCD apparatus decreases the number of masks necessary to manufacture a TFT array substrate, thereby reducing a manufacturing time and the manufacturing cost.

Abstract: A sine wave generation circuit and an uninterruptible power supply system (UPS) using the same, and more particularly, a sine wave generation circuit and a UPS using the same, which can output a sine wave for direct current (DC) power from a battery. In the UPS, a rectifier rectifies commercial alternating current (AC) power from an input terminal and converts the AC power into DC power. A charger charges a battery with the DC power. The battery provides the DC power. A DC-DC converter boosts and/or drops the DC power inputted from the battery by a predetermined level of the AC power. A D-class amplifier receives the DC power from the DC-DC converter and outputs a sine waveform power signal in response to a waveform control signal. A sine waveform controller controls a sine waveform generation operation of the D-class amplifier.

Abstract: A sine wave generation circuit and an uninterruptible power supply system (UPS) using the same, and more particularly, a sine wave generation circuit and a UPS using the same, which can output a sine wave for direct current (DC) power from a battery. In the UPS, a rectifier rectifies commercial alternating current (AC) power from an input terminal and converts the AC power into DC power. A charger charges a battery with the DC power. The battery provides the DC power. A DC-DC converter boosts and/or drops the DC power inputted from the battery by a predetermined level of the AC power. A D-class amplifier receives the DC power from the DC-DC converter and outputs a sine waveform power signal in response to a waveform control signal. A sine waveform controller controls a sine waveform generation operation of the D-class amplifier.

Abstract: A method for cryptographing information. The information cryptographing method can be executed in a client terminal based on a wired/wireless network. The method comprises the steps of generating a private encryption key and a public key for information encryption, sending the generated public key and an encryption execution module to the client terminal, executing the encryption execution module and the public key in the client terminal to encrypt the information and receiving the encrypted information from the client terminal, and calling the generated private encryption key and decrypting the received encrypted information with the called private encryption key.