Jang-Hwan
Jang Hwan Cho, Seoul KR
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20130257298 | POWER COMPENSATION DEVICE AND LIGHT EMITTING DIODE ILLUMINATION APPARATUS HAVING THE SAME - A light emitting diode (LED) illumination device having a power compensation function is provided. The illumination device includes a light emitting unit including a plurality of LEDs connected in series, a rectifier for rectifying input AC power to provide a rectified voltage to the light emitting device, and a power compensator for detecting a change in the rectified voltage provided to the light emitting device and compensating a current provided to the light emitting device according to the detected change in the rectified voltage. | 10-03-2013 |
Jang Hwan Cho, Icheon-Si Gyeonggi-Do KR
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20150235715 | STACKED SEMICONDUCTOR MEMORY APPARATUS AND TEST CIRCUIT THEREFOR - A stacked semiconductor memory apparatus includes a memory module including a plurality of memory chips; and a logic circuit block with the memory module stacked thereon, configured to be electrically coupled with an interface substrate through a first terminal group and a second terminal group and to communicate with a controller, and to include a test circuit that receives a first test signal through the first terminal group from the controller and outputs the first test signal through the second terminal group in a test mode. | 08-20-2015 |
Jang Hwan Kim, Suwon-Si KR
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20100148753 | Method to predict phase current - A phase current prediction method is disclosed. The phase current prediction method predicts current representative of a PWM period using a motor model which receives current measured through a single current sensor as an input, instead of the measured current, and determines the predicted current to be phase current. | 06-17-2010 |
20100287333 | DATA STORAGE DEVICE AND RELATED METHOD OF OPERATION - A data storage device comprises a plurality of memory devices, a buffer memory, and a controller. The plurality of memory devices are connected to a plurality of channels and a plurality of ways. The buffer memory temporarily stores data to be written in the memory devices. The controller stores the data in the buffer memory based on channel and way information of the memory devices. | 11-11-2010 |
20120008394 | NONVOLATILE MEMORY SYSTEM AND REFRESH METHOD - A memory system including non-volatile memory devices and a corresponding refresh method are disclosed. The method groups memory blocks of the non-volatile memory devices into memory groups, determines a refresh sequence for the memory groups, and refreshes the memory groups in accordance with the refresh sequence. | 01-12-2012 |
20120203955 | DATA PROCESSING DEVICE AND SYSTEM INCLUDING THE SAME - A data processing system includes a host and a data processing device configured to store data output from the host. The data processing device includes a compressor configured to compress the data and sort compressed data according to a size of the compressed data and a buffer block configured to store the compressed data that has been sorted. | 08-09-2012 |
20130193886 | SENSORLESS CONTROL APPARATUSES OF MOTORS AND CONTROL METHODS THEREOF - A sensorless control apparatus of a motor may include: a position estimator configured to compensate for a resistance and a magnetic flux of a permanent magnet of the motor according to a temperature of the motor, and/or configured to generate an estimated speed of a rotor of the motor based on the compensated resistance and the compensated magnetic flux of the permanent magnet; and/or a speed controller configured to generate a command current based on a command speed of the rotor and the estimated speed of the rotor. | 08-01-2013 |
20140160858 | NONVOLATILE MEMORY SYSTEM AND REFRESH METHOD - A memory system including non-volatile memory devices and a corresponding refresh method are disclosed. The method groups memory blocks of the non-volatile memory devices into memory groups, determines a refresh sequence for the memory groups, and refreshes the memory groups in accordance with the refresh sequence. | 06-12-2014 |
20150077030 | DUAL INVERTER SYSTEM AND METHOD OF CONTROLLING THE SAME - A dual inverter system to drive a motor in an electronic apparatus and a method of controlling the same include a first inverter connected to one side of a stator winding of the motor to modulate a pulse width and to adjust power supplied to the motor, a second inverter connected to the other side of the stator winding of the motor to modulate a pulse width and to adjust power supplied to the motor, a first current detector connected to the first inverter to detect a current flowing in the first inverter, a second current detector connected to the second inverter to detect a current flowing in the second inverter, and a controller to control the motor by controlling a pulse-width modulation (PWM) signal applied to the first inverter or the second inverter based on the current flowing in at least one of the first inverter and the second inverter. | 03-19-2015 |
Jang Hwan Kim, Suson-Si KR
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20120066438 | NON-VOLATILE MEMORY DEVICE, OPERATION METHOD THEREOF, AND DEVICE HAVING THE SAME - A memory device includes a control module to determine first data blocks needing a garbage collection, to determine second data blocks needing memory refresh among the determined first data blocks, and to execute the garbage collection first on the second data blocks. | 03-15-2012 |
Jang Hwan Lee, Seoul KR
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20130025535 | SLOT DIE FOR IMPROVING COATING UNIFORMITY - Provided is a slot die for improving coating uniformity including a main body, a cavity formed in the main body, an introduction part formed at an upper portion of the main body to supply a coating solution into the cavity, an injection unit configured to provide an external ejection path for the coating solution with respect to a portion of or the entire cavity, and a guide member arranged in the cavity to help diffusion of the coating solution to the injection unit. | 01-31-2013 |
Jang Hwan Yoon, Seoul KR
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20120007581 | OSCILLATOR - An oscillator includes a reference voltage generator configured to generate a reference voltage varying according a change in temperature and an external voltage, a first comparison voltage generator configured to output a first comparison voltage to a first node in response to the reference voltage, a second comparison voltage generator configured to output a second comparison voltage to a second node in response to the reference voltage, a first comparison circuit configured to compare the reference voltage and the first comparison voltage and to generate a first input voltage as a result of the comparison, a second comparison circuit configured to compare the reference voltage and the second comparison voltage and to generate a second input voltage as a result of the comparison, and a clock generator configured to output a clock signal that oscillates in response to the first and second input voltages. | 01-12-2012 |
20130343135 | SEMICONDUCTOR MEMORY DEVICES - A semiconductor memory device includes at least one memory cell connected to an internal voltage line that receives a cell power supply voltage and a write assist circuit connected to the internal voltage line. The write assist circuit lowers a level of the cell power supply voltage to a target level during a first period of a write operation on the memory cell and maintains the level of the cell power supply voltage at the target level during a second period of the write operation based on a write assist control signal. The second period succeeds the first period. | 12-26-2013 |
20140015590 | POWER GATING CIRCUIT - A power gating circuit includes a first current switch, a second current switch, and a switching controller. The first current switch is connected between a power rail and a circuit block operated by an operating supply voltage, and provides a first current when turned on. The second current switch is connected between the power rail and circuit block, and provides a second current larger than the first current when turned on. The switching controller turns on first current switch when transitioned from a sleep mode to an active mode to change the operating supply voltage using the first current, generates a reference voltage based on the operating supply voltage that changes more slowly than the operating supply voltage, and turns on the second current switch based on the reference voltage to provide the second current to the circuit block. | 01-16-2014 |
Jang-Hwan Ahn, Gyeonggi-Do KR
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20110167249 | COMPUTER SYSTEM AND METHOD CAPABLE OF REMOTELY RESTORING OPERATING SYSTEM - A computer system and a method for remotely restoring, upgrading, or booting an operating system (O.S). A communication unit communicates with an external device in which a restoring image of the operating system is stored. A user's input request for initialization, causes a controller to perform an initialization according to a power-on input, including checking whether or not a request for restoring the O.S. has been received from a user prior to starting a boot of the operating system. If a request for restoring the operating system is received, the restoring image stored in the external device is accessed through the communication unit to restore the operating system installed in the computer system. | 07-07-2011 |
Jang-Hwan Ahn, Suwon-Si KR
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20100011201 | COMPUTER SYSTEM AND CONTROL METHOD THEREOF - A control method of a computer system, including setting whether to enable a connection with at least one peripheral device in an operating system of the computer system to transmit and receive data; and enabling or disabling the connection with the at least one peripheral device based on the setting when the computer system is booted. | 01-14-2010 |
Jang-Hwan Bae, Incheon KR
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20090143118 | INTERNAL ANTENNA FOR MOBILE PHONE AND MANUFACTURING METHOD THEREOF - A cellular phone antenna and a manufacturing method of the same are disclosed, in which a high frequency characteristic and a product safety are enhanced using a cellular phone antenna which is manufactured by preventing an antenna device from being transformed. The cellular phone antenna comprises an antenna base which is engaged in an interior of a cellular phone; an antenna which is installed at the antenna base; a connection terminal which is connected with the antenna; and a holder which is attached to the antenna base so that the antenna and the connection terminal are connected. | 06-04-2009 |
Jang-Hwan Jeong, Gyeonggi-Do KR
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20100173492 | METHOD OF FORMING SEMICONDUCTOR DEVICE PATTERNS - Provided is a method of forming patterns of a semiconductor device, whereby patterns having various widths can be simultaneously formed, and pattern density can be doubled by a double patterning process in a portion of the semiconductor device. In the method of forming patterns of a semiconductor device, a first mold mask pattern and a second mold mask patter having different widths are formed on a substrate. A pair of first spacers covering both sidewalls of the first mold mask pattern and a pair of second spacers covering both sidewalls of the second mold mask pattern are formed. The first mold mask pattern and the second mold mask pattern are removed, and a wide-width mask pattern covering the second spacer is formed. A lower layer is etched using the first spacers, the second spacers, and the wide-width mask pattern as an etch mask. | 07-08-2010 |
Jang-Hwan Kim, Gumi-Si KR
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20120092647 | OPTICAL SENSING FRAME AND DISPLAY DEVICE THEREWITH - The present invention relates to display devices, and more particularly to an optical sensing frame in which an infrared sensor module is fastened to a case top with a bracket to secure an assembly margin and prevent the infrared sensor module from mismatching with a liquid crystal display module by relative movement; and a display device therewith, the optical sensing frame includes a case top having a frame shaped upper side, and sides bent and extended from four sides of the upper side perpendicular thereto, first to third brackets fastened to an inside of the upper side of the case top at three corners thereof respectively, and an infrared sensor module placed in each of the first to third brackets. | 04-19-2012 |
Jang-Hwan Kim, Gyeonggi-Do KR
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20140145745 | TEST SYSTEM FOR TESTING A CMOS IMAGE SENSOR AND A DRIVING METHOD THEREOF - A test system including a test device configured to transmit an input signal and a control signal to at least one complementary metal-oxide semiconductor (CMOS) image sensor via a probe card, and an interface board configured to map the probe card and the test device. The interface board includes an output receiver configured to receive an image signal from the at least one CMOS image sensor and transform the image signal into image data. | 05-29-2014 |
Jang-Hwan Shin, Suwon-Si KR
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20090185339 | Flat panel display apparatus - A flat panel display apparatus includes a flat display panel including first and second substrates facing each other with a display unit therebetween, the first substrate extending beyond the second substrate, a portion of the first substrate extending beyond the second substrate defining a protruding portion, an outermost edge of the protruding portion defining a protruding edge of the first substrate, and corners of the protruding portion being chamfered, and a bezel surrounding the flat display panel. | 07-23-2009 |
20100102719 | Organic light emitting diode display and method for manufacturing the same - The present invention relates to an OLED display and a manufacturing method thereof, and the OLED display according to the present invention includes a display substrate including an OLED, a sealing member disposed opposite to the display substrate and covering the OLED, and a sealant interposed between the display substrate and the sealing member and that seals them to each other, and the sealant has a curved inner surface and an angular outer surface in at least one of corner areas of the display substrate and the sealing member. | 04-29-2010 |