Patents by Inventor Keon-young Lee
Keon-young Lee 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: 11961432Abstract: A display device includes a display area and a non-display area disposed around the display area and including a pad area. The display device includes a resistance checker disposed in the non-display area, resistance test pads disposed in the pad area, resistance test lines connecting the resistance checker with the resistance test pad, and crack test lines disposed on the outer side of the resistance checker. The resistance test lines intersect the crack test lines in a plan view.Type: GrantFiled: July 1, 2020Date of Patent: April 16, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Joo Hye Jung, Keon Woo Kim, Dong Hyun Lee, Deuk Jong Kim, Deok Young Choi
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Patent number: 10154556Abstract: A light emitting diode (LED) driving circuit including a dimmer modulating an AC voltage input depending on a selected dimming level, a rectifying unit performing a full-wave rectification for an AC voltage to generate and output a driving voltage, first and second dimming level detecting units receiving the driving voltage of the rectifying unit to detect the selected dimming level, and outputting first and second dimming level signals depending on the detected dimming level, a first driving module controlling a first LED light emitting unit using the first dimming level signal of the first dimming level detecting unit, and a second driving module controlling a second LED light emitting unit using the second dimming level signal of the second dimming level detecting unit, in which the first and second driving modules control the first and second LED light emitting units, respectively.Type: GrantFiled: August 31, 2015Date of Patent: December 11, 2018Assignee: Seoul Semiconductor Co., Ltd.Inventor: Keon Young Lee
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Patent number: 9918360Abstract: A lighting apparatus using light emitting diodes is disclosed. A plurality of light-emitting groups are connected to each other in series at an output terminal of a rectification unit. Current diodes as current sources are branched from a node between the light-emitting groups. Current values set in the current diodes are set according to the amount of current flowing into the light-emitting groups. Therethrough, the amount of current flowing in each light-emitting group can be determined.Type: GrantFiled: July 8, 2013Date of Patent: March 13, 2018Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee
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Patent number: 9860830Abstract: A method for selecting a cell by an electronic device including a plurality of antennas includes obtaining first received power-related information for a reference signal received from a first cell of a first network through a first antenna of the plurality of antennas configured to transmit and receive signals, determining whether the first received power-related information meets a preset first condition, and when the first received power-related information meets the first condition, forming a connection with the first cell or transmitting at least a portion of the first received power-related information to the first cell or a second cell of the first network.Type: GrantFiled: October 21, 2016Date of Patent: January 2, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Keon-Young Lee, Yu-Shin Kim, Kyoung-Ho Lee
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Patent number: 9807777Abstract: An antenna switching method of an electronic device is provided. The antenna switching method includes measuring a transmit power variation of a first antenna, monitoring characteristics of received signals of both the first antenna and a second antenna, determining a comparison result by comparing the characteristics of the received signals of both the first antenna and the second antenna when the transmit power variation is greater than or equal to a threshold value, and switching a transmitting antenna based on at least the comparison result.Type: GrantFiled: March 30, 2015Date of Patent: October 31, 2017Assignee: Samsung Electronics Co., Ltd.Inventors: Tae Yoon Kim, Keon Young Lee, Chae Man Lim, Sang Won Kim, Yu Shin Kim
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Publication number: 20170280527Abstract: A light emitting diode (LED) driving circuit including a dimmer modulating an AC voltage input depending on a selected dimming level, a rectifying unit performing a full-wave rectification for an AC voltage to generate and output a driving voltage, first and second dimming level detecting units receiving the driving voltage of the rectifying unit to detect the selected dimming level, and outputting first and second dimming level signals depending on the detected dimming level, a first driving module controlling a first LED light emitting unit using the first dimming level signal of the first dimming level detecting unit, and a second driving module controlling a second LED light emitting unit using the second dimming level signal of the second dimming level detecting unit, in which the first and second driving modules control the first and second LED light emitting units, respectively.Type: ApplicationFiled: August 31, 2015Publication date: September 28, 2017Applicant: Seoul Semiconductor Co., Ltd.Inventor: Keon Young LEE
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Patent number: 9730290Abstract: A dimmable alternating current (AC) driven light emitting diode (LED) illuminating apparatus including a TRIAC dimmer configured to perform a dimming control using a phase control.Type: GrantFiled: April 29, 2016Date of Patent: August 8, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventors: Keon Young Lee, Chung Hoon Lee
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Publication number: 20170118700Abstract: A method for selecting a cell by an electronic device including a plurality of antennas includes obtaining first received power-related information for a reference signal received from a first cell of a first network through a first antenna of the plurality of antennas configured to transmit and receive signals, determining whether the first received power-related information meets a preset first condition, and when the first received power-related information meets the first condition, forming a connection with the first cell or transmitting at least a portion of the first received power-related information to the first cell or a second cell of the first network.Type: ApplicationFiled: October 21, 2016Publication date: April 27, 2017Inventors: Keon-Young LEE, Yu-Shin KIM, Kyoung-Ho LEE
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Patent number: 9554440Abstract: A dimmable LED lighting apparatus including a power input unit generating drive voltage through rectification of received AC power and outputting the generated drive voltage to the drive controller, an insulation type signal transceiver receiving a pulse width modulation (PWM) signal output from a PWM dimmer and outputting the PWM signal to the drive controller, while electrically insulating the PWM dimmer from the drive controller, a first LED group to an nth LED group, n being a positive integer of 2 or greater, receiving the drive voltage and sequentially operating under control of the drive controller, and a drive controller controlling sequential operation of the first LED group to the nth LED group according to a voltage level of the drive voltage, determining a dimming level based on the received PWM dimming signal, and controlling dimming of the first LED group to the nth LED group based on the determined dimming level.Type: GrantFiled: December 15, 2014Date of Patent: January 24, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventor: Keon Young Lee
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Publication number: 20160249429Abstract: A dimmable alternating current (AC) driven light emitting diode (LED) illuminating apparatus including a TRIAC dimmer configured to perform a dimming control using a phase control.Type: ApplicationFiled: April 29, 2016Publication date: August 25, 2016Inventors: Keon Young LEE, Chung Hoon LEE
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Publication number: 20160240740Abstract: A light emitting diode (LED) package includes a package body having a recessed portion, a first lead electrode and a second lead electrode spaced apart from each other, and a light emitting device arranged in the recessed portion and electrically connected to the first lead electrode and the second lead electrode. The LED package is configured to be driven by an alternating current (AC) and by a voltage higher than that for driving one light emitting diode.Type: ApplicationFiled: April 25, 2016Publication date: August 18, 2016Inventors: Chung Hoon LEE, Keon Young LEE, Hong San KIM, Dae Won KIM, Hyuck Jung CHOI
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Patent number: 9345094Abstract: A dimmable alternating current (AC) driven light emitting diode (LED) illuminating apparatus including a TRIAC dimmer configured to perform a dimming control using a phase control.Type: GrantFiled: October 6, 2014Date of Patent: May 17, 2016Assignee: Seoul Semiconductor Co., Ltd.Inventors: Keon Young Lee, Chung Hoon Lee
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Publication number: 20160105939Abstract: A dimmable LED lighting apparatus including a power input unit generating drive voltage through rectification of received AC power and outputting the generated drive voltage to the drive controller, an insulation type signal transceiver receiving a pulse width modulation (PWM) signal output from a PWM dimmer and outputting the PWM signal to the drive controller, while electrically insulating the PWM dimmer from the drive controller, a first LED group to an nth LED group, n being a positive integer of 2 or greater, receiving the drive voltage and sequentially operating under control of the drive controller, and a drive controller controlling sequential operation of the first LED group to the nth LED group according to a voltage level of the drive voltage, determining a dimming level based on the received PWM dimming signal, and controlling dimming of the first LED group to the nth LED group based on the determined dimming level.Type: ApplicationFiled: December 15, 2014Publication date: April 14, 2016Inventor: Keon Young LEE
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Publication number: 20150282196Abstract: An antenna switching method of an electronic device is provided. The antenna switching method includes measuring a transmit power variation of a first antenna, monitoring characteristics of received signals of both the first antenna and a second antenna, determining a comparison result by comparing the characteristics of the received signals of both the first antenna and the second antenna when the transmit power variation is greater than or equal to a threshold value, and switching a transmitting antenna based on at least the comparison result.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Inventors: Tae Yoon KIM, Keon Young LEE, Chae Man LIM, Sang Won KIM, Yu Shin KIM
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Publication number: 20150195876Abstract: A lighting apparatus using light emitting diodes is disclosed. A plurality of light-emitting groups are connected to each other in series at an output terminal of a rectification unit. Current diodes as current sources are branched from a node between the light-emitting groups. Current values set in the current diodes are set according to the amount of current flowing into the light-emitting groups. Therethrough, the amount of current flowing in each light-emitting group can be determined.Type: ApplicationFiled: July 8, 2013Publication date: July 9, 2015Inventors: Chung Hoon Lee, Keon Young Lee
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Publication number: 20150129904Abstract: A light emitting diode (LED) package includes a package body having a recessed portion, a first lead electrode and a second lead electrode spaced apart from each other, and a light emitting device arranged in the recessed portion and electrically connected to the first lead electrode and the second lead electrode. The LED package is configured to be driven by an alternating current (AC) and by a voltage higher than that for driving one light emitting diode.Type: ApplicationFiled: January 19, 2015Publication date: May 14, 2015Inventors: Chung Hoon LEE, Keon Young LEE, Hong San KIM, Dae Won KIM, Hyuck Jung CHOI
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Publication number: 20150097484Abstract: A dimmable alternating current (AC) driven light emitting diode (LED) illuminating apparatus including a TRIAC dimmer configured to perform a dimming control using a phase control.Type: ApplicationFiled: October 6, 2014Publication date: April 9, 2015Inventors: Keon Young LEE, Chung Hoon Lee
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Patent number: 8937326Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: February 24, 2011Date of Patent: January 20, 2015Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuck Jung Choi
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Patent number: 8610138Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: November 15, 2011Date of Patent: December 17, 2013Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuok Jung Choi
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Patent number: 8569961Abstract: Provided is an AC LED light emitting device. The AC LED light emitting device flows a current to at least one AC LED array among at least two AC LED arrays of an AC LED light emitting unit to turn it on during one period of an AC power having sine wave characteristics if a magnitude of a voltage applied to the AC LED light emitting unit including at least two AC LED arrays each of which including at least one AC LED is smaller than a turn-on voltage determined according to the number of AC LED arrays of the AC LED light emitting unit. If the magnitude of the voltage applied to the AC LED light emitting unit is larger than the turn-on voltage of the AC LED light emitting unit, all of the AC LED arrays of the AC LED light emitting unit are turned on.Type: GrantFiled: November 12, 2010Date of Patent: October 29, 2013Assignee: Kwangsung Electronic Industry Co., Ltd.Inventors: Keon Young Lee, Choong Hae Lee