Abstract: A semiconductor device comprising a fingerprint sensor configured to generate first-direction sensing data and second-direction sensing data by sensing a fingerprint image in a first direction and a second direction, respectively, which is perpendicular to the first direction; a differential sensing circuit configured to generate first-direction first differential data and second-direction first differential data by performing a differential operation on the first-direction sensing data and the second-direction sensing data, respectively; and a fingerprint processing circuit configured to generate first-direction second differential data and second-direction second differential data by performing a differential operation on the first-direction first differential data and the second-direction first differential data, respectively, and generate fingerprint data by adding the first-direction second differential data and the second-direction second differential data.

Abstract: A gas sensing system includes a driving circuit chip, and a gas sensor, a temperature sensor, and a humidity sensor, which are located on the driving circuit chip. The gas sensing system compensates a gas sensing result based on at least one of a temperature sensing result and a humidity sensing result and generates a gas sensing signal. The gas sensor includes a first resonator and a first sensing film being configured to sense a first gas and located on the first resonator to be exposed to the outside. The temperature sensor includes a second resonator and an encapsulation layer located above the second resonator not to expose the second resonator to the outside, and the humidity sensor includes a third resonator.

Abstract: A resonator sensor device includes a lower electrode located on a substrate, a piezoelectric layer located on the lower electrode, an upper electrode located on the piezoelectric layer, an upper passivation layer located on the upper electrode, the upper passivation layer including a hydrophobic material, and a gas sensing layer located on the upper passivation layer.

Abstract: A gas sensor including a gas sensing device having a resonant frequency that varies with adsorbed chemicals, a frequency detector configured to detect the resonant frequency of the gas sensing device, a calibrator configured to generate current calibration data based on the resonant frequency of the gas sensing device which has been heated to a calibration temperature in a calibration mode, and a compensator configured to adjust an output value of the frequency detector based on the current calibration data in a sensing mode may be provided.

Abstract: An electronic device includes a pop-up device configured to be inserted into a main body of the electronic device in an inserted state, including a gas sensor including a sensor block for sensing a gas, and configured to expose the sensor block to an outer portion of the electronic device in a pop-up state; a power supplier arranged on an outer portion of the pop-up device, configured to supply electric power to the gas sensor; and a connection controller configured to control a connection state of the pop-up device, to block supply of electric power to the gas sensor when the pop-up device is in the inserted state and to supply electric power to the gas sensor when the pop-up device is in the pop-up state, including one or more terminals formed on the pop-up device that move together with the pop-up device when the pop-up device moves.

Abstract: A semiconductor device comprising a fingerprint sensor configured to generate first-direction sensing data and second-direction sensing data by sensing a fingerprint image in a first direction and a second direction, respectively, which is perpendicular to the first direction; a differential sensing circuit configured to generate first-direction first differential data and second-direction first differential data by performing a differential operation on the first-direction sensing data and the second-direction sensing data, respectively; and a fingerprint processing circuit configured to generate first-direction second differential data and second-direction second differential data by performing a differential operation on the first-direction first differential data and the second-direction first differential data, respectively, and generate fingerprint data by adding the first-direction second differential data and the second-direction second differential data.

Abstract: At least some example embodiments provide a fingerprint sensor, a fingerprint sensor package, and a fingerprint sensing system using light sources of a display panel. The fingerprint sensor includes an image sensor including a plurality of sensor pixels, the sensor pixels configured to sense light reflected by a fingerprint and generate image information corresponding to the fingerprint and a pinhole mask defining a plurality of pinholes, wherein each of the pinholes forms a focus for transmitting the light reflected by the fingerprint to the image sensor, wherein light is emitted from a plurality of organic light-emitting diodes (OLEDs) and is reflected by the fingerprint.

Abstract: A programmable gain amplifier (PGA) circuit includes a first input resistor coupled between a first input node and a first summing node and a second input resistor coupled between a second input node and a second summing node. The PGA circuit further includes a first variable reference resistor coupled between a third input node and the first summing node, a second variable reference resistor coupled between a fourth input node and the second summing node, and an operational amplifier having first and second inputs coupled to respective ones of the first and second summing nodes and first and second outputs coupled to respective ones of the first and second output nodes. At least of the first and second reference resistors may include an R-2R ladder circuit.

Abstract: An image forming apparatus includes a body; a paper supply tray mounted in the body; a first sensor including a light emitting element and a light receiving element; a first actuator including a first actuating arm to sense the presence of the printing medium stored in the paper supply tray by coming into contact with and being moved by the printing medium, a second actuating arm to sense a width of the printing medium by selectively coming into contact with and being moved by the printing medium fed to the printing path according to the width of the printing medium, and a first sensing arm placed between the first actuating arm and the second actuating arm to intercept the light that would otherwise be transmitted to the light receiving element by being moved in linkage with the first actuating arm and the second actuating arm.

Abstract: A side key connection device of a mobile terminal simplifies a connection structure between a side key and a main circuit board. The mobile terminal includes a side key and a row and column terminal pad. The mobile terminal also includes a side key connection device installed between the side key and the row and column terminal pad. The side key connection device is electrically connected to the side key and the row and column terminal pad. Thereby, by simplifying a connection structure of a side key, a key cost, an assembly process, and a surface mounting cost can be reduced.

Abstract: An image forming apparatus includes a body; a paper supply tray mounted in the body; a first sensor including a light emitting element and a light receiving element; a first actuator including a first actuating arm to sense the presence of the printing medium stored in the paper supply tray by coming into contact with and being moved by the printing medium, a second actuating arm to sense a width of the printing medium by selectively coming into contact with and being moved by the printing medium fed to the printing path according to the width of the printing medium, and a first sensing arm placed between the first actuating arm and the second actuating arm to intercept the light that would otherwise be transmitted to the light receiving element by being moved in linkage with the first actuating arm and the second actuating arm.

Abstract: An image forming apparatus realizes two functions using a single actuator to sense the width and presence of a printing medium and a single sensor to sense operation of the actuator, resulting in reduced manufacturing costs.

Abstract: Disclosed is a triple swirl gas turbine combustor using various fuels such as coal gas, DiMethyl Ether, and waste gas generated in an ironworks in a gas turbine. The triple swirl gas turbine combustor combusts three different fuels simultaneously or individually and various fuels such as LCV gas and HCV gas so that fuel flexibility can be improved. Swirl generated in a second swirler of the triple swirler is reversely jetted to increase a mixing degree of a fuel-air mixture and an intensity of a turbulent flow so that combustion efficiency can be increased, harmful exhaust gas can be reduced and vibration can be reduced.

Abstract: A dual fuel nozzle of a gas turbine combustor with a variable jetting hole diameter is disclosed. The combustor includes a plurality of swirling wings disposed along an outer peripheral surface of a central shaft to have at least one main fuel jetting hole, an air duct positioned at the lower side of the swirling wings to supply air to the swirling wings, a pilot fuel injection hole and jetting hole formed to pass through a central portion of the central shaft to supply a pilot fuel, a switching plate disposed inside the swirling wings to vary the size of the main fuel jetting hole, a driving unit disposed to be connected to the switching plate to move a position of the switching plate, and a casing containing the swirling wings, the air duct, the switching plate and the driving unit. It is possible to enhance fuel flexibility in a multiple fuel system for applying two or more fuels to a gas turbine at the same time.

Abstract: Disclosed herein are a fuel nozzle of a gas turbine combustor for dimethyl ether (DME, CH3OCH3) and a design method thereof. The fuel nozzle includes a pilot fuel injection hole formed at the center of the nozzle and a plurality of fuel injection ports formed at equiangular positions around the pilot fuel injection hole to inject DME. Each of the fuel injection ports includes a pair of upper and lower DME injection orifices communicating with a fuel-air mixture injection swirler. The upper DME injection orifice becomes gradually wider, whereas the lower DME injection orifice becomes gradually narrower. Thus, DME can be optimally combusted in the gas turbine combustor, thereby achieving cost reduction of power plants, enhancement in reliability of the power plants, and diversification of usable fuel.

Abstract: An image forming apparatus realizes two functions using a single actuator to sense the width and presence of a printing medium and a single sensor to sense operation of the actuator, resulting in reduced manufacturing costs.

Abstract: A side key connection device of a mobile terminal simplifies a connection structure between a side key and a main circuit board. The mobile terminal includes a side key and a row and column terminal pad. The mobile terminal also includes a side key connection device installed between the side key and the row and column terminal pad. The side key connection device is electrically connected to the side key and the row and column terminal pad. Thereby, by simplifying a connection structure of a side key, a key cost, an assembly process, and a surface mounting cost can be reduced.

Abstract: Provided is an image reading apparatus including a scanning unit having a flat glass plane and a scanning module, and an auto document feeder (ADF) having a contact member. The contact member has a body unit that faces the scanning unit while interposing the flat glass plane therebetween and biases the document toward the flat glass plane, and a plurality of elastic ribs that elastically bias the body unit toward the flat glass plane and which are integrally formed with the body unit.

Abstract: Disclosed is a triple swirl gas turbine combustor using various fuels such as coal gas, DiMethyl Ether, and waste gas generated in an ironworks in a gas turbine. The triple swirl gas turbine combustor combusts three different fuels simultaneously or individually and various fuels such as LCV gas and HCV gas so that fuel flexibility can be improved. Swirl generated in a second swirler of the triple swirler is reversely jetted to increase a mixing degree of a fuel-air mixture and an intensity of a turbulent flow so that combustion efficiency can be increased, harmful exhaust gas can be reduced and vibration can be reduced.

Abstract: Disclosed herein are a pixel circuit and driving method for active matrix Organic Light-emitting Diodes (OLEDs), and a display using the same. The pixel circuit includes a Voltage Control Current Source (VCCS), a high gain amplifier, a storage capacitor, and first and second switches. The VCCS is configured to drive OLEDs. The high gain amplifier is configured such that the control input signal of the VCCS causes the VCCS to be placed in an ON or OFF state. The storage capacitor is located between the input terminal of the high gain amplifier and a data line so as to assign the ON-time of the VCCS. The first and second switches are configured to be controlled through a scan line so as to store voltage in the storage capacitor and control the light-emitting time of the OLEDs, and are formed the input terminal of the high gain amplifier and the input terminal of the VCCS, respectively.