Kt Corporation

Db Hitek Co., Ltd.

Kist Corp.

Kyoung-Tae Kim

Jae-Hong Ko

Min-Jeong Kim

Kyung-Tae Hong

Ji-Young Byun

Heon-Phil Ha

Mun-Gyu Kim

Jung-Man Doh

Seung-Jin Yeo

Jun-Chae Na

Disclosed is a gamma correction circuit and method capable of minimizing power consumption by adding third and fourth input amplifiers receiving reference voltages which are identical to voltages to first and second input amplifiers, respectively, and deactivating the first and second input amplifiers during an always on display (AOD) mode. The gamma correction circuit includes a first input amplifier configured to output a maximum voltage when active, a second input amplifier configured to output a minimum voltage when active, a third input amplifier configured to output a highest gamma voltage in response to the first reference voltage, and a fourth input amplifier configured to output a lowest gamma voltage in response to the second reference voltage. The first and second input amplifiers are deactivated when the display driving device operates in the AOD mode.

Gamma correction circuit and gamma correction method

Managing data of a smart card that includes a high-capacity memory and a high-speed memory. The high-capacity memory stores information and the high-speed memory stores an index to the information, and hence high-speed access to the high-capacity memory may be provided by referencing the index.

Smart card and method for managing data of smart card, and mobile terminal

An IC card and a terminal mounted with an IC card are disclosed. In one embodiment, the IC card includes i) a memory, ii) a plurality of contacts including a pair of RF contacts and at least one communication contact, a micro processor, selecting any one of a low speed communication protocol and a high speed communication protocol, processing data written in the memory by a command inputted through any one of the RF contact and the communication contact determined by the selected communication protocol, and outputting a corresponding response, iii) a high speed interface, communicating the command and the response through the communication contact by use of the high speed communication protocol, iv) a low speed interface, communicating the command and the response through the communication contact by use of the low speed communication protocol and v) a contact allotting unit, connecting the communication contact determined by the selected communication protocol to any one of the low speed interface and the high speed interface.

IC card, terminal with IC card and initializing method thereof

The present invention relates to a composite layer including a metal and inorganic powders, and a method for manufacturing the same. The method for manufacturing a composite layer including a metal and inorganic powders includes step of preparing an electrolyte which includes nickel sulfamate [Ni(NHSO)] at 50.0 g/l&#x2dc;300.0 g/l, boric acid at 10.0 g/l&#x2dc;20.0 g/l, nickel chloride (NiCl) at 1.0 g/l&#x2dc;10.0 g/l, coumarin (CHO) at 0.02 g/l&#x2dc;0.5 g/l, sodium dodecyl sulfate [CH&#x2014;(CH)&#x2014;OSONa] at 4.0 g/l&#x2dc;60.0 g/l, sulfuric acid at 0.0 ml/l&#x2dc;150.0 ml/l, one or more inorganic powders selected from the group of alumina (AlO) and silicon carbide (SiC) at 20.0 g/l&#x2dc;70.0 g/l, and the remainder being distilled water. A basic metal to be coated with the composite metal is dipped into the electrolyte, and power is applied to the basic metal to electroplate the basic metal with the electrolyte to form a composite layer on the basic metal.

Composite layer including metal and inorganic powders and method for manufacturing the same

Growing community of inventors

Seoul, South Korea

Kyoung-Tae Kim