Patents by Inventor Joung Woo Lee
Joung Woo 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: 11125512Abstract: Implementations described herein generally relate to substrate processing equipment and more particularly to methods and compositions for temperature control of substrate processing equipment. In one implementation, a method of cooling a processing chamber component is provided. The method comprises introducing an inert purge gas into a supply reservoir containing a coolant and flowing the treated coolant to a processing chamber component to cool the processing chamber component. The coolant initially comprises deionized water and a water-soluble base.Type: GrantFiled: March 29, 2017Date of Patent: September 21, 2021Assignee: Applied Materials, Inc.Inventors: Jianqi Wang, Joung Woo Lee, Gia Pham, Alex Gerrard, Robert C. McIntosh
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Patent number: 10418429Abstract: An organic light emitting display device includes a substrate including a plurality of pixels defined thereon; a first electrode disposed at each pixel; a bank exposing the first electrode of each pixel; a spacer including, sequentially on the bank, a first layer of a first negative photoreactive acryl and a second layer of a second negative photoreactive acryl having a greater photoreactivity than a photoreactivity of the first negative photoreactive acryl, wherein the first layer has a negative taper and the second layer has a positive taper; an organic layer on the bank and the first electrode, the organic layer including an organic light emitting layer; and a second electrode on the bank, the spacer, and the organic layer.Type: GrantFiled: July 16, 2018Date of Patent: September 17, 2019Assignee: LG Display Co., Ltd.Inventors: Mi-Seong Kim, Joung-Woo Lee, Se-Jun Cho, Seung-Hee Kuk
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Publication number: 20180323245Abstract: An organic light emitting display device includes a substrate including a plurality of pixels defined thereon; a first electrode disposed at each pixel; a bank exposing the first electrode of each pixel; a spacer including, sequentially on the bank, a first layer of a first negative photoreactive acryl and a second layer of a second negative photoreactive acryl having a greater photoreactivity than a photoreactivity of the first negative photoreactive acryl, wherein the first layer has a negative taper and the second layer has a positive taper; an organic layer on the bank and the first electrode, the organic layer including an organic light emitting layer; and a second electrode on the bank, the spacer, and the organic layer.Type: ApplicationFiled: July 16, 2018Publication date: November 8, 2018Applicant: LG Display Co., Ltd.Inventors: Mi-Seong Kim, Joung-Woo Lee, Se-Jun Cho, Seung-Hee Kuk
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Patent number: 10026791Abstract: An organic light emitting display device includes a substrate including a plurality of pixels defined thereon; a first electrode disposed at each pixel; a bank exposing the first electrode of each pixel; a spacer including, sequentially on the bank, a first layer of a first negative photoreactive acryl and a second layer of a second negative photoreactive acryl having a greater photoreactivity than a photoreactivity of the first negative photoreactive acryl, wherein the first layer has a negative taper and the second layer has a positive taper; an organic layer on the bank and the first electrode, the organic layer including an organic light emitting layer; and a second electrode on the bank, the spacer, and the organic layer.Type: GrantFiled: December 29, 2016Date of Patent: July 17, 2018Assignee: LG Display Co., Ltd.Inventors: Mi-Seong Kim, Joung-Woo Lee, Se-Jun Cho, Seung-Hee Kuk
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Patent number: 9871085Abstract: Disclosed is an organic light-emitting diode display panel, which may effectively reduce or prevent spreading of the peeling of an organic light-emitting layer by using a bar-shaped reversed spacer, regardless of the direction in which the organic layer peels off. The organic light-emitting diode display panel may include a reversed spacer, which is disposed on a bank insulation layer having an opening and includes a reversed-trapezoidal cross section, the reversed spacer having a bar shape when viewed from the front side of the organic light-emitting diode display panel.Type: GrantFiled: December 30, 2016Date of Patent: January 16, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Se-Jun Cho, Joung-Woo Lee, Seung-Hee Kuk, Mi-Seong Kim
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Publication number: 20170307310Abstract: Implementations described herein generally relate to substrate processing equipment and more particularly to methods and compositions for temperature control of substrate processing equipment. In one implementation, a method of cooling a processing chamber component is provided. The method comprises introducing an inert purge gas into a supply reservoir containing a coolant and flowing the treated coolant to a processing chamber component to cool the processing chamber component. The coolant initially comprises deionized water and a water-soluble base.Type: ApplicationFiled: March 29, 2017Publication date: October 26, 2017Inventors: Jianqi WANG, Joung Woo LEE, Gia PHAM, Alex GERRARD, Robert C. MCINTOSH
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Publication number: 20170194399Abstract: Disclosed is an organic light-emitting diode display panel, which may effectively reduce or prevent spreading of the peeling of an organic light-emitting layer by using a bar-shaped reversed spacer, regardless of the direction in which the organic layer peels off. The organic light-emitting diode display panel may include a reversed spacer, which is disposed on a bank insulation layer having an opening and includes a reversed-trapezoidal cross section, the reversed spacer having a bar shape when viewed from the front side of the organic light-emitting diode display panel.Type: ApplicationFiled: December 30, 2016Publication date: July 6, 2017Inventors: Se-Jun CHO, Joung-Woo LEE, Seung-Hee KUK, Mi-Seong KIM
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Publication number: 20170194398Abstract: An organic light emitting display device includes a substrate including a plurality of pixels defined thereon; a first electrode disposed at each pixel; a bank exposing the first electrode of each pixel; a spacer including, sequentially on the bank, a first layer of a first negative photoreactive acryl and a second layer of a second negative photoreactive acryl having a greater photoreactivity than a photoreactivity of the first negative photoreactive acryl, wherein the first layer has a negative taper and the second layer has a positive taper; an organic layer on the bank and the first electrode, the organic layer including an organic light emitting layer; and a second electrode on the bank, the spacer, and the organic layer.Type: ApplicationFiled: December 29, 2016Publication date: July 6, 2017Applicant: LG Display Co., Ltd.Inventors: Mi-Seong Kim, Joung-Woo Lee, Se-Jun Cho, Seung-Hee Kuk
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Patent number: 9448573Abstract: A DC-DC converter control circuit with enhanced driving efficiency while securing circuit stability during light-load driving of the DC-DC converter through variation of an on/off duty ratio of a burst mode according to load. The control circuit includes a detection unit for detecting an amount of current and a voltage at an output stage of a DC-DC converter, and generating and outputting a differential voltage according to a level of the detected voltage, a comparison unit for comparing the differential voltage with a reference voltage having a triangle or sawtooth waveform, thereby generating a duty signal, and a converter controller for generating an on/off control signal corresponding to a duty ratio of the duty signal, and supplying the on/off control signal to the DC-DC converter, to control on/off of the DC-DC converter.Type: GrantFiled: December 21, 2012Date of Patent: September 20, 2016Assignees: LG Display Co., Ltd., Postech Academy-Industry FoundationInventors: Kyung-Min Lee, Joung-Woo Lee, Bong-Koo Kang, Chang-Hyun Sung, Ho-Young Yoon
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Patent number: 9445469Abstract: Disclosed is a backlight driving apparatus. The backlight driving apparatus includes a light source configured to include at least one LED, a DC-DC converter configured to generate a driving voltage according to a turn-on of a switching element and supply the driving voltage to the light source, a feedback circuit configured to generate a feedback voltage corresponding to a voltage level of the driving voltage supplied from light source, a duty controller connected to the light source, and configured to control a turn-on period of the LED according to an LED duty signal corresponding to a backlight dimming signal, and a switching controller configured to generate a PWM signal for controlling the turn-on of the switching element according to the feedback signal, generate a switching control signal corresponding to the PWM signal according to the LED duty signal, and selectively control the turn-on of the switching element.Type: GrantFiled: November 18, 2013Date of Patent: September 13, 2016Assignee: LG Display Co., Ltd.Inventor: Joung Woo Lee
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Patent number: 8890796Abstract: A method and a circuit for synchronizing input and output synchronizing signals are disclosed. The method for synchronizing input and output synchronizing signals includes detecting an Nth (N is a positive integer) input period of the input synchronizing signal, determining whether the detected Nth input period is the same with a prior (N?1) the output period of the output synchronizing signal, detecting a difference between an end time of the (N?1)the output period and an end time of the Nth input period, if the detected Nth input period is not the same with the (N?1)the output period, operating the detected difference with the Nth input period, and setting the operated value as an Nth output period, and generating and outputting the output synchronizing signal having the set Nth output period.Type: GrantFiled: December 14, 2011Date of Patent: November 18, 2014Assignee: LG Display Co., Ltd.Inventors: Joung-Woo Lee, Jun-Hyeok Yang
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Patent number: 8821643Abstract: A method of cleaning a chamber used for annealing doped wafer substrates. In one embodiment the method provides removing dopants deposited in an annealing chamber after an annealing process of a doped substrate by flowing one or more volatilizing gases into the annealing chamber, applying heat to volatilize the deposited dopants in the annealing chamber, and exhausting the chamber to remove volatilized dopants from the annealing chamber.Type: GrantFiled: November 12, 2012Date of Patent: September 2, 2014Assignee: Applied Materials, Inc.Inventors: Balasubramanian Ramachandran, Tae Jung Kim, Jung Hoon Sun, Joung Woo Lee, Hwa Joong Lim, Sang Phil Lee, Joseph M. Ranish
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Publication number: 20140176618Abstract: Disclosed is a backlight driving apparatus. The backlight driving apparatus includes a light source configured to include at least one LED, a DC-DC converter configured to generate a driving voltage according to a turn-on of a switching element and supply the driving voltage to the light source, a feedback circuit configured to generate a feedback voltage corresponding to a voltage level of the driving voltage supplied from light source, a duty controller connected to the light source, and configured to control a turn-on period of the LED according to an LED duty signal corresponding to a backlight dimming signal, and a switching controller configured to generate a PWM signal for controlling the turn-on of the switching element according to the feedback signal, generate a switching control signal corresponding to the PWM signal according to the LED duty signal, and selectively control the turn-on of the switching element.Type: ApplicationFiled: November 18, 2013Publication date: June 26, 2014Applicant: LG Display Co., Ltd.Inventor: Joung Woo Lee
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Publication number: 20140092075Abstract: A DC-DC converter control circuit with enhanced driving efficiency while securing circuit stability during light-load driving of the DC-DC converter through variation of an on/off duty ratio of a burst mode according to load. The control circuit includes a detection unit for detecting an amount of current and a voltage at an output stage of a DC-DC converter, and generating and outputting a differential voltage according to a level of the detected voltage, a comparison unit for comparing the differential voltage with a reference voltage having a triangle or sawtooth waveform, thereby generating a duty signal, and a converter controller for generating an on/off control signal corresponding to a duty ratio of the duty signal, and supplying the on/off control signal to the DC-DC converter, to control on/off of the DC-DC converter.Type: ApplicationFiled: December 21, 2012Publication date: April 3, 2014Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, LG DISPLAY CO., LTD.Inventors: Kyung-Min LEE, Joung-Woo LEE, Bong-Koo KANG, Chang-Hyun Sung, Ho-Young YOON
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Publication number: 20130178072Abstract: A method of cleaning a chamber used for annealing doped wafer substrates. In one embodiment the method provides removing dopants deposited in an annealing chamber after an annealing process of a doped substrate by flowing one or more volatilizing gases into the annealing chamber, applying heat to volatilize the deposited dopants in the annealing chamber, and exhausting the chamber to remove volatilized dopants from the annealing chamber.Type: ApplicationFiled: November 12, 2012Publication date: July 11, 2013Inventors: BALASUBRAMANIAN RAMACHANDRAN, Tae Jung Kim, Jung Hoon Sun, Joung Woo Lee, Hwa Joong Lim, Sang Phil Lee, Joseph M. Ranish
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Publication number: 20120169801Abstract: A method and a circuit for synchronizing input and output synchronizing signals are disclosed. The method for synchronizing input and output synchronizing signals includes detecting an Nth (N is a positive integer) input period of the input synchronizing signal, determining whether the detected Nth input period is the same with a prior (N?1)th output period of the output synchronizing signal, detecting a difference between an end time of the (N?1)th output period and an end time of the Nth input period, if the detected Nth input period is not the same with the (N?1)th output period, operating the detected difference with the Nth input period, and setting the operated value as an Nth output period, and generating and outputting the output synchronizing signal having the set Nth output period.Type: ApplicationFiled: December 14, 2011Publication date: July 5, 2012Inventors: Joung-Woo Lee, Jun-Hyeok Yang
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Publication number: 20080115808Abstract: A method of cleaning a chamber used for annealing doped wafer substrates. In one embodiment the method provides removing dopants deposited in an annealing chamber after an annealing process of a doped substrate by flowing one or more volatilizing gases into the annealing chamber, applying heat to volatilize the deposited dopants in the annealing chamber, and exhausting the chamber to remove volatilized dopants from the annealing chamber.Type: ApplicationFiled: November 20, 2006Publication date: May 22, 2008Inventors: Balasubramanian Ramachandran, Tae Jung Kim, Jung Hoon Sun, Joung Woo Lee, Hwa Joong Lim, Sang Phil Lee, Joseph Michael Ranish