Patents by Inventor Chang-Woo Ha
Chang-Woo Ha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11963386Abstract: A display apparatus includes a base substrate, a light emitting structure disposed on the base substrate, and a thin film encapsulation layer disposed on the light emitting structure and including at least one inorganic layer and at least one organic layer. The at least one inorganic layer includes a high density layer having a density of greater than or equal to about 2.0 g/cm3 and a low density layer having a density of less than about 2.0 g/cm3. The high density layer and the low density layer are in contact with each other.Type: GrantFiled: September 2, 2022Date of Patent: April 16, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Chang Yeong Song, Won Jong Kim, Yi Su Kim, Jong Woo Kim, Hye In Yang, Woo Suk Jung, Yong Chan Ju, Jae Heung Ha
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Publication number: 20240122037Abstract: A display device includes a substrate that includes a display area and a non-display area, a display element layer disposed on the display area of the substrate, an opposing substrate that faces the substrate and the display element layer, a sealing member disposed on the non-display area and that couples the substrate and the opposing substrate, and a filler disposed between the substrate and the opposing substrate. A thickness of the filler varies in the range of 60% to 400% of a thickness of the sealing member.Type: ApplicationFiled: June 21, 2023Publication date: April 11, 2024Inventors: Jae Heung HA, Jong Woo KIM, So Young OH, Woo Suk JUNG, Hee Yeon PARK, Chang Yeong SONG, Jong Kwang YUN
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Patent number: 11949046Abstract: A light-emitting element includes a first semiconductor layer doped to have a first polarity, a second semiconductor layer doped to have a second polarity different from the first polarity, a light-emitting layer disposed between the first and second semiconductor layers, a shell layer formed on side surfaces of the first semiconductor layer, the light-emitting layer, and the second semiconductor layer, the shell layer including a divalent metal element, and an insulating film covering an outer surface of the shell layer and surrounding the side surface of the light-emitting layer.Type: GrantFiled: August 6, 2021Date of Patent: April 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Se Hun Kim, Chang Hee Lee, Yun Hyuk Ko, Duk Ki Kim, Jun Woo Park, Soo Ho Lee, Jae Kook Ha, Yun Ku Jung
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Patent number: 11935876Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.Type: GrantFiled: April 27, 2021Date of Patent: March 19, 2024Assignee: Samsung Display Co., Ltd.Inventors: Jun Bo Sim, Duk Ki Kim, Yong Hwi Kim, Hyo Jin Ko, Chang Hee Lee, Chan Woo Joo, Jae Kook Ha, Na Mi Hong
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Publication number: 20230122546Abstract: A method for measuring a position, is performed by a vehicle assembly (VA) for alignment between a ground assembly (GA) and the VA. The method includes transmitting low frequency (LF) signals to initiate alignment with the GA and estimating a position of a vehicle using at least one sensor mounted on the vehicle. Information regarding the estimated position of the vehicle is provided to the GA and information regarding a position of the vehicle measured by LF receive antennas of the GA and an acceleration flag calculated by the GA is received. Accordingly, a transmission strength of the LF signals transmitted by the VA is adjusted based on the information regarding the position of the vehicle measured by the LF receive antennas and the acceleration flag.Type: ApplicationFiled: December 21, 2022Publication date: April 20, 2023Inventors: Jae Yong Seong, Chang Woo Ha, Ki Won Ko, Bong Ju Kim
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Patent number: 11611246Abstract: A method for measuring a position, is performed by a vehicle assembly (VA) for alignment between a ground assembly (GA) and the VA. The method includes transmitting low frequency (LF) signals to initiate alignment with the GA and estimating a position of a vehicle using at least one sensor mounted on the vehicle. Information regarding the estimated position of the vehicle is provided to the GA and information regarding a position of the vehicle measured by LF receive antennas of the GA and an acceleration flag calculated by the GA is received. Accordingly, a transmission strength of the LF signals transmitted by the VA is adjusted based on the information regarding the position of the vehicle measured by the LF receive antennas and the acceleration flag.Type: GrantFiled: October 22, 2019Date of Patent: March 21, 2023Assignees: Hyundai Motor Company, Kia Motors Corporation, Hyundai Autron Co., Ltd.Inventors: Jae Yong Seong, Chang Woo Ha, Ki Won Ko, Bong Ju Kim
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Publication number: 20220194434Abstract: An autonomous driving control apparatus may include a processor configured to determine a wear degree of a tire of a vehicle based on image data of the tire during autonomous driving of the vehicle, and to perform vehicle control depending on the wear degree of the tire; and a storage electrically connected to the processor and configured to store the image data and algorithms driven by the processor.Type: ApplicationFiled: August 25, 2021Publication date: June 23, 2022Inventors: Chang Woo HA, Tae Sik KIM, Ho Jun KIM, Chang Eui SON, Eun Ho LEE, Jang Soon HAN
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Publication number: 20200130529Abstract: A method for measuring a position, is performed by a vehicle assembly (VA) for alignment between a ground assembly (GA) and the VA. The method includes transmitting low frequency (LF) signals to initiate alignment with the GA and estimating a position of a vehicle using at least one sensor mounted on the vehicle. Information regarding the estimated position of the vehicle is provided to the GA and information regarding a position of the vehicle measured by LF receive antennas of the GA and an acceleration flag calculated by the GA is received. Accordingly, a transmission strength of the LF signals transmitted by the VA is adjusted based on the information regarding the position of the vehicle measured by the LF receive antennas and the acceleration flag.Type: ApplicationFiled: October 22, 2019Publication date: April 30, 2020Inventors: Jae Yong Seong, Chang Woo Ha, Ki Won Ko, Bong Ju Kim
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Patent number: 10459316Abstract: Provided is a camera apparatus for a vehicle, including a housing having a recess formed therein. The housing may include: a main wall part having a camera hole formed therein; a base part extended from the main wall part and having a downward slope in which a distance from the center axis of the camera hole to the base part increases toward the end of the base part from the main wall part; and a sidewall part adjacent to the main wall part and extended upward from the base part, the main wall part, the base part and the sidewall part form the recess in the housing, and a light trap part for trapping light reflected from the base part and the sidewall part into the camera hole is installed on the base part and the sidewall part.Type: GrantFiled: July 27, 2018Date of Patent: October 29, 2019Assignee: Hyundai Autron Co., Ltd.Inventors: Chang Woo Ha, Jun Muk Lee, Ho Joon Kim, Byung Jik Keum
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Publication number: 20190033689Abstract: Provided is a camera apparatus for a vehicle, including a housing having a recess formed therein. The housing may include: a main wall part having a camera hole formed therein; a base part extended from the main wall part and having a downward slope in which a distance from the center axis of the camera hole to the base part increases toward the end of the base part from the main wall part; and a sidewall part adjacent to the main wall part and extended upward from the base part, the main wall part, the base part and the sidewall part form the recess in the housing, and a light trap part for trapping light reflected from the base part and the sidewall part into the camera hole is installed on the base part and the sidewall part.Type: ApplicationFiled: July 27, 2018Publication date: January 31, 2019Inventors: Chang Woo HA, Jun Muk LEE, Ho Joon KIM, Byung Jik KEUM
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Patent number: 8643587Abstract: In an FSC mode LCD, a controller operates in response to an external adjustment, and a DC/DC converter converts a battery voltage into a driving voltage under control of the controller. A color LED backlight includes first, second and third color LED arrays connected in parallel, which are operated by the driving voltage. An FSC generator generates first, second and third color PWM signals according to an internal sawtooth voltage and a dimming voltage. A 3-channel current source generates first, second and third driving currents under control of the controller, and on/off switches paths of the first, second and third driving currents flowing through the first, second and third color LED arrays according to the first, second and third color PWM signals generated from the FSC generator, thereby adjusting luminance of the first, second and third color LED arrays of the color LED backlight.Type: GrantFiled: December 4, 2006Date of Patent: February 4, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Chang Woo Ha, Byoung Own Min, Jeong In Cheon, Yu Jin Jang
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Patent number: 8207877Abstract: An apparatus for transferring serial data (e.g., a serial interface using a single wire) generally includes a detector configured to detect a first level time period and a second level time period of an input signal, and a computing unit configured to compute a duty or duty cycle of the input signal and generate an output signal based on the duty or duty cycle.Type: GrantFiled: April 22, 2010Date of Patent: June 26, 2012Assignee: Dongbu HiTek Co., Ltd.Inventors: Chang Woo Ha, Sung Hoon Bea, Sang Heum Yeon
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Patent number: 8102193Abstract: A current sensing circuit includes a power transistor, a sensing transistor configured to copy a current flowing through the power transistor at a predetermined ratio, a current sensing resistor configured to detect a voltage from the current copied by the sensing transistor, an input resistor configured to convert an input voltage to a current, a cross self-biasing cascade block configured to adjust currents at both ends of the input resistor, and a common gate transistor and a reference resistor configured to convert a current output of the input resistor to a final sense voltage.Type: GrantFiled: December 21, 2009Date of Patent: January 24, 2012Assignee: Dongbu HiTek Co., Ltd.Inventors: Chang-Woo Ha, Jung-Ah Jang
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Patent number: 8054123Abstract: A boot strap driver including a fast differential level shifter are disclosed. The fast differential level shifter may include a first differential amplifier differentially amplifying a pulse width modulation signal and an inverted pulse width modulation signal and outputting a first differential amplification voltage and a second differential amplification voltage based on the amplified result. The fast differential level shifter may also include a second differential amplifier differentially amplifying the first differential amplification voltage and the second differential amplification voltage, and shifting the differential amplification voltages to voltages having an output range between a first voltage and a second voltage based on the amplified result.Type: GrantFiled: December 23, 2009Date of Patent: November 8, 2011Assignee: Dongbu HiTek Co., Ltd.Inventors: Chang-Woo Ha, Seung-Hun Hong
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Patent number: 8018177Abstract: A dimming buck type light emitting diode (LED) driving apparatus includes a main switch controlling a driving current flowing into an LED; a current detector detecting a driving current flowing into the LED; a power level determination unit determining a level of the driving power; a dimming capacitor for dimming control; a dimming control unit controlling charging and discharging of the dimming capacitor according to a power level determination signal and an enable signal; a reset circuit unit generating a reset signal according to a detection voltage from the current detector and a voltage of the dimming capacitor; a pulse generation unit generating a pulse signal; and a latch set by the pulse signal of the pulse generation unit and reset by the reset signal of the reset circuit unit to generate a switching signal, and turning on and off the main switch using the switching signal.Type: GrantFiled: June 25, 2008Date of Patent: September 13, 2011Assignees: Samsung Electro-Mechanics Co., Ltd., Samsung LED Co., Ltd.Inventors: Bon Ahm Goo, Byoung Own Min, Young Jin Lee, Chang Woo Ha, Jeong In Cheon
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Publication number: 20100271251Abstract: An apparatus for transferring serial data (e.g., a serial interface using a single wire) generally includes a detector configured to detect a first level time period and a second level time period of an input signal, and a computing unit configured to compute a duty or duty cycle of the input signal and generate an output signal based on the duty or duty cycle.Type: ApplicationFiled: April 22, 2010Publication date: October 28, 2010Inventors: Chang Woo HA, Sung Hoon Bea, Sang Heum Yeon
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Patent number: 7800566Abstract: Disclosed herein is a drive device of a color light emitting diode (LED) backlight, which is capable of precisely adjusting the forward voltages of color LED arrays for each channel.Type: GrantFiled: November 30, 2006Date of Patent: September 21, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Chang Woo Ha, Sang Cheol Shin, Byoung Own Min
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Publication number: 20100164553Abstract: A current sensing circuit includes a power transistor, a sensing transistor configured to copy a current flowing through the power transistor at a predetermined ratio, a current sensing resistor configured to detect a voltage from the current copied by the sensing transistor, an input resistor configured to convert an input voltage to a current, a cross self-biasing cascade block configured to adjust currents at both ends of the input resistor, and a common gate transistor and a reference resistor configured to convert a current output of the input resistor to a final sense voltage.Type: ApplicationFiled: December 21, 2009Publication date: July 1, 2010Inventors: Chang-Woo Ha, Jung-Ah Jang
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Publication number: 20100164593Abstract: A boot strap driver including a fast differential level shifter are disclosed. The fast differential level shifter may include a first differential amplifier differentially amplifying a pulse width modulation signal and an inverted pulse width modulation signal and outputting a first differential amplification voltage and a second differential amplification voltage based on the amplified result. The fast differential level shifter may also include a second differential amplifier differentially amplifying the first differential amplification voltage and the second differential amplification voltage, and shifting the differential amplification voltages to voltages having an output range between a first voltage and a second voltage based on the amplified result.Type: ApplicationFiled: December 23, 2009Publication date: July 1, 2010Inventors: Chang-Woo Ha, Seung-Hun Hong
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Patent number: 7746318Abstract: An LCD backlight inverter includes a soft starter for generating a soft-start reference voltage gradually increasing as the driving power begins to be supplied. The LCD backlight inverter also includes a first error detector for receiving a first feedback voltage indicating the magnitude of driving current of the lamp and for comparing a smaller value out of a predetermined first reference voltage and the soft-start reference voltage with the first feedback voltage to generate a first error signal corresponding to the difference between the smaller value and the soft-start reference voltage. The LCD backlight inverter further includes a pulse width modulation comparator for comparing the first error signal and a triangle wave oscillation signal to output the pulse width modulation control signal with a predetermined duty ratio. The LCD backlight inverter prevents application of over-current and over-voltage to the LCD backlight to prolong the lifetime of the backlight.Type: GrantFiled: April 2, 2007Date of Patent: June 29, 2010Assignee: Samsung Electro-Mechanics Co., LtdInventors: Sang Cheol Shin, Byoung Own Min, Chang Woo Ha, Jung Chul Gong