Electronics and Telecommunications Research Institute

Lg Chem, Ltd

Dongwon Systems Corporation

Bongjun Kim

Hyun-Tak Kim

Jong Sung Park

Yeon Keun Lee

Mun Kyu Joo

Deok Hwan Kim

Ji Hoon Park

Gyungock Kim

Jun Sik Kim

Sun-Jin Yun

JungWook Lim

Yong-Wook Lee

Hyun Tak Kim

Byung-Gyu Chae

Sungyoul Choi

Jeong Yong Choi

Minhyuk Yun

Sun Shin Kwag

Giwan Seo

The present specification relates to an optical film, and a display device including an optical film, comprising a dye or pigment absorbing at least some of a wavelength of 490 nm to 510 nm; having a transmission color of a D65 light source, a CIE standard illuminant, of −8<a*<8 and −8<b*<8, wherein a* indicates a direction the transmission color is leaned between red and green and b* indicates a direction the transmission color is leaned between yellow and blue; and satisfying the following Equations 1 and 2:%(500 nm)<%(530 nm),  [Equation 1][%(500 nm)×1.8]<[%(460 nm)+%(610 nm)]  [Equation 2] wherein, in Equations 1 and 2, T % (A nm) is transmittance at a wavelength of A nm.

Optical film and display device comprising same

The present application relates to an adhesive composition, an adhesive film, an adhesive optical filter and a display device.

Adhesive composition, adhesive film, adhesive optical filter and display device

The inventive concept provides MIT devices molded by clear compound epoxy and fire detecting devices including the MIT device. The fire detecting device is supplied with a power source from a power control device. The fire detecting device includes a MIT device including a MIT chip molded by a clear compound epoxy, a diode bridge circuit supplied with the power source from the power control device for providing a non-polar power source, a notice circuit supplied with the non-polar power source from the diode bridge circuit for warning of a fire alarm in response to a detecting signal from the MIT device, and a stabilization circuit for maintaining the detecting signal for a certain period.

Fire detecting device including metal-insulator transition (MIT) device molded by clear compound epoxy

Metal-insulator transition (MIT) device molded by clear compound epoxy

The inventive concept shows the embodiment of t-switch which is a MIT 3-terminal device based on a Hole-driven MIT theory and a technology for removing an ESD noise signal which is one of applications of the t-switch. The t-switch includes three terminals of Inlet, Outlet and Control, and a metal-insulator transition (MIT) occurs at an Outlet layer by a current flowing through the Control terminal. In the t-switch, a high resistor is connected to the Control terminal and thereby an ESD noise signal of high voltage flows through the Inlet-Outlet without damaging the device.

Method for removing electro-static discharge (EDS) noise signal in electronic system including the metal-insulator transition (MIT) 3-terminal device

Disclosed is a multipurpose alarm apparatus which includes a smoke sensing unit configured to sense a smoke using a first sensor and a second sensor, each of the first and second sensors including a temperature-sensitive smoke sensor portion disposed between a first electrode and a second electrode; a smoke level measuring unit configured to generate a smoke level measurement signal by comparing a difference between first and second smoke detection signals from the first and second sensors with a reference signal; and a sensing control unit configured to generate a fire alarm signal when the smoke level measurement signal corresponds to a fire generation condition.

Composite temperature and smoke alarm device and equipped smoke sensor therein

Provided are metal-semiconductor convergence electric circuit devices. The device includes a semiconductor device, a metal resistor exhibiting resistance increased with an increase in temperature thereof, and an interconnection line connecting the semiconductor device with the metal resistor in series and having a resistance lower than that of the metal resistor. The semiconductor device is configured to exhibit resistance decreased with an increase in temperature thereof and compensate the resistance increase of the metal resistor.

Metal-semiconductor convergence electric circuit devices and electric circuit systems using the same

The present inventive concept is a hyuntak transistor that can prevent a thermal runaway phenomenon and a low heat high efficiency constant current circuit using an auxiliary transistor capable of a high amplification and a constant current. The circuit may be applied to drive a LED and a motor.

Constant current circuit of high efficiency

Provided are a variable field effect transistor (FET) designed to suppress a reduction of current between a source and a drain due to heat while decreasing a temperature of the FET, and an electrical and electronic apparatus including the variable gate FET. The variable gate FET includes a FET and a gate control device that is attached to a surface or a heat-generating portion of the FET and is connected to a gate terminal of the FET so as to vary a voltage of the gate terminal. A channel current between the source and drain is controlled by the gate control device that varies the voltage of the gate terminal when the temperature of the FET increases above a predetermined temperature.

Variable gate field-effect transistor and electrical and electronic apparatus including the same

Provided are a thermistor with 3 terminals, a thermistor-transistor including the thermistor, a circuit for controlling heat of a power transistor using the thermistor-transistor, and a power system including the circuit. The circuit includes: a thermistor-transistor which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor connected to the thermistor; and at least one power transistor which is connected to a driving device to control a supply of power to the driving device, wherein the thermistor-transistor is adhered to one of a surface and a heat-emitting part of the at least one power transistor and is connected to one of a base, a gate, a collector, and a drain of the at least one power transistor to decrease or block a current flowing in the at least one power transistor when the temperature of the at least one power transistor rises, so as to prevent the power transistor from heating up.

Thermistor with 3 terminals, thermistor-transistor, circuit for controlling heat of power transistor using the thermistor-transistor, and power system including the circuit

Provided are an oscillatory circuit based on a metal-insulator transition (MIT) device that can generate a simple and very high oscillating frequency using the MIT device, and a method of driving the oscillatory circuit. The oscillatory circuit includes the MIT device that comprises an MIT thin film and an electrode thin film connected to the MIT thin film and in which an abrupt MIT is generated due to an MIT generating voltage, a resistor that is serially connected to the MIT device, an electric al power source limiting the maximum amount of an applied current and applying a direct current constant voltage to the MIT device, and a light source irradiating electromagnetic waves on the MIT device, wherein the oscillating properties are generated by irradiating the electromagnetic waves using the light source.

Growing community of inventors

Daejeon, South Korea

Bongjun Kim