Patents by Inventor Won Kyu Ha
Won Kyu 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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Publication number: 20230152349Abstract: The present disclosure describes a probe design to measure cycles of microdevices. In particular, the probe comprises, electrodes, dielectric, stimulating capacitor, voltage stimulating source for time varying stimulating voltage signal and a series switch to control biasing condition. The probe structure further has a probe tip and resting pads (ring shape or otherwise) along with a leveling mechanism and apparatus. The disclosure also describes a method to measure cycles of microdevices using the probe structure.Type: ApplicationFiled: March 10, 2021Publication date: May 18, 2023Applicant: VueReal Inc.Inventors: Gholamreza CHAJI, Won Kyu HA
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Patent number: 11552163Abstract: What is disclosed is structures and methods to integrate microdevices into system or receiver substrates. The integration of microdevices is facilitated by adding staging pads to microdevices before or after transferring. Creating stages after the transfer of a first microdevice to a substrate for the subsequent microdevice transfer to the first (or the second) microdevice transfer. The stage improves the surface profile of the substrate so that next microdevice can be transferred without the first microdevice on the substrate get damaged by or interfere with the surface of the donor or transfer head. Some embodiments further relate to tiled display device and more particularly, to stacking tiles to a backplane to form the tiled display device.Type: GrantFiled: August 21, 2019Date of Patent: January 10, 2023Assignee: VueReal Inc.Inventors: Gholamreza Chaji, Won Kyu Ha, Aaron Daniel Trent Wiersma, Ehsanollah Fathi
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Publication number: 20210343828Abstract: What is disclosed is structures and methods to integrate microdevices into system or receiver substrates. The integration of microdevices is facilitated by adding staging pads to microdevices before or after transferring. Creating stages after the transfer of a first microdevice to a substrate for the subsequent microdevice transfer to the first (or the second) microdevice transfer. The stage improves the surface profile of the substrate so that next microdevice can be transferred without the first microdevice on the substrate get damaged by or interfere with the surface of the donor or transfer head. Some embodiments further relate to tiled display device and more particularly, to stacking tiles to a backplane to form the tiled display device.Type: ApplicationFiled: July 14, 2021Publication date: November 4, 2021Applicant: VueReal Inc.Inventors: Gholamreza Chaji, Won Kyu Ha, Aaron Daniel Trent Wiersma, Ehsanollah Fathi
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Publication number: 20210098562Abstract: What is disclosed is structures and methods to integrate microdevices into system or receiver substrates. The integration of microdevices is facilitated by adding staging pads to microdevices before or after transferring. Creating stages after the transfer of a first microdevice to a substrate for the subsequent microdevice transfer to the first (or the second) microdevice transfer. The stage improves the surface profile of the substrate so that next microdevice can be transferred without the first microdevice on the substrate get damaged by or interfere with the surface of the donor or transfer head. Some embodiments further relate to tiled display device and more particularly, to stacking tiles to a backplane to form the tiled display device.Type: ApplicationFiled: December 14, 2020Publication date: April 1, 2021Applicant: VueReal Inc.Inventors: Gholamreza Chaji, Won Kyu Ha, Aaron Daniel Trent Wiersma, Ehsanollah Fathi
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Publication number: 20200273945Abstract: What is disclosed is structures and methods to integrate microdevices into system or receiver substrates. The integration of microdevices is facilitated by adding staging pads to microdevices before or after transferring. Creating stages after the transfer of a first microdevice to a substrate for the subsequent microdevice transfer to the first (or the second) microdevice transfer. The stage improves the surface profile of the substrate so that next microdevice can be transferred without the first microdevice on the substrate get damaged by or interfere with the surface of the donor or transfer head. Some embodiments further relate to tiled display device and more particularly, to stacking tiles to a backplane to form the tiled display device.Type: ApplicationFiled: August 21, 2019Publication date: August 27, 2020Applicant: VueReal Inc.Inventors: Gholamreza Chaji, Won Kyu Ha, Aaron Daniel Trent Wiersma, Ehsanollah Fathi
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Patent number: 10366651Abstract: An organic light-emitting display device includes a display panel, a source driver, a scan driver, and a timing controller. A gate node of a second transistor of an (N?1)-th sub pixel and a gate node of a first transistor of an N-th sub pixel are connected in common such that the second transistor of the (N?1)-th sub pixel and the first transistor of the N-th sub pixel are simultaneously turned on by a scan signal supplied to the second transistor of the (N?1)-th sub pixel. Accordingly, it is possible to decrease a size of the scan driver and a bezel area.Type: GrantFiled: December 1, 2016Date of Patent: July 30, 2019Assignee: LG Display Co., Ltd.Inventor: Won Kyu Ha
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Publication number: 20170162112Abstract: An organic light-emitting display device includes a display panel, a source driver, a scan driver, and a timing controller. A gate node of a second transistor of an (N?1)-th sub pixel and a gate node of a first transistor of an N-th sub pixel are connected in common such that the second transistor of the (N?1)-th sub pixel and the first transistor of the N-th sub pixel are simultaneously turned on by a scan signal supplied to the second transistor of the (N?1)-th sub pixel. Accordingly, it is possible to decrease a size of the scan driver and a bezel area.Type: ApplicationFiled: December 1, 2016Publication date: June 8, 2017Inventor: Won Kyu HA
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Patent number: 9530353Abstract: An organic electroluminescent display device includes an organic electroluminescent diode receiving a driving voltage and a first ground voltage; first and second driving thin film transistors for providing a driving current to the organic electroluminescent diode; a first switching thin film transistor receiving a data voltage and switched by an nth scan signal; a second switching thin film transistor switched by a current providing signal; a third switching thin film transistor receiving a second ground voltage and switched by a selection signal; a fourth switching thin film transistor disposed among an output terminal of the second switching thin film transistor; and a first capacitor disposed among the output terminal of the first switching thin film transistor, the gate terminal of the first driving thin film transistor and the gate terminal of the second driving thin film transistor.Type: GrantFiled: August 28, 2013Date of Patent: December 27, 2016Assignee: LG DISPLAY CO., LTD.Inventors: Seung-Tae Kim, Han-Jin Bae, Ho-Min Lim, Won-Kyu Ha, Hak-Su Kim
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Patent number: 9240139Abstract: An organic electroluminescent display device includes a plurality of pixels, each one of the plurality of pixels including: a switching transistor that is connected to a gate line and a data line; a driving transistor, wherein a data voltage of the data line passing through the switching transistor is reflected into a gate of the driving transistor; a sampling transistor that samples a threshold voltage of the driving transistor, wherein a gate of the sampling transistor is connected to a control line, and the sampled threshold voltage is reflected into the gate of the driving transistor; an initializing transistor, wherein a gate of the initializing transistor is connected to a previous or next gate line, and an initialization voltage passing through the initializing transistor is reflected into the gate of the driving transistor; and an organic light emitting diode that is connected to the driving transistor, wherein a driving current of the organic light emitting diode is adjusted according to a voltage ofType: GrantFiled: November 16, 2009Date of Patent: January 19, 2016Assignee: LG Display Co., Ltd.Inventors: Hak-Su Kim, Sang-Ho Yu, Won-Kyu Ha
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Patent number: 9224328Abstract: A method for controlling an organic electro luminescence display device, the device including a display panel including a plurality of data lines that cross a plurality of scan lines, and including electro luminescence elements arranged at intersections of the plurality of data lines and the plurality of scan lines; a pre-charge driver configured to select one of a plurality of pre-charge current levels in accordance with a gray level of incoming data, and supply a pre-charge current, corresponding to the selected one of the plurality of pre-charge current levels, to the electro luminescence elements via the plurality of data lines prior to supplying a data current, corresponding to the incoming data, to the electro luminescence elements, so as to pre-charge the electro luminescence elements; and a data driver configured to subsequently supply the data current to the pre-charged electro luminescence elements via the plurality of data lines.Type: GrantFiled: May 31, 2005Date of Patent: December 29, 2015Assignee: LG DISPLAY CO., LTD.Inventors: Hak Su Kim, Jae Do Lee, Won Kyu Ha
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Patent number: 9129554Abstract: An organic light emitting display device having a data line that is used for sending data voltage signals to pixels from a data driver as well as send sensor signals for detecting threshold voltage levels of driving transistors in the pixels at different times. By using the same data line to transmit the data voltage signals and the sensor signals, the number of signal lines in the organic light emitting display can be reduced. The data driver also includes switches for selectively coupling the data line to a driver unit or an analog to digital converter (ADC) unit.Type: GrantFiled: December 10, 2012Date of Patent: September 8, 2015Assignee: LG Display Co., Ltd.Inventors: Seung Tae Kim, Jin Hyoung Kim, Jong Sik Shim, Won Kyu Ha
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Patent number: 9070646Abstract: Disclosed is an organic light-emitting display device defined into a non-display area and a display area which is provided with pixels. Each of the pixels includes: first through fourth nodes; an organic light emission element connected to the fourth node; a drive transistor disposed between the second, third, and fourth nodes and configured to generate a drive current which drives the organic light emission element to emit light; a storage capacitor disposed between the first and third nodes; first through fifth transistors; wherein the fifth transistor is disposed between the second node with the non-display area and a reference voltage line and configured to control an initialization of the second node.Type: GrantFiled: November 26, 2012Date of Patent: June 30, 2015Assignee: LG Display Co., Ltd.Inventors: Won Kyu Ha, Bum Sik Kim, Kil Hwan Oh
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Patent number: 9035976Abstract: The present invention relates to an organic light emitting diode display device capable of sensing driving current of each pixel with a simple configuration to compensate for a luminance deviation between pixels and a pixel current sensing method thereof. The organic light emitting diode display device includes a display panel including 2N (N being a natural number) pixels that share a reference line though which a reference signal is supplied and are respectively connected to 2N data lines through which data signals are applied, and a data driver for driving the 2N pixels sharing the reference line in a time division manner through the data lines, sensing currents of the time-division-driven 2N pixels as voltages through the shared reference line and outputting the sensed currents, in a sensing mode.Type: GrantFiled: December 12, 2012Date of Patent: May 19, 2015Assignee: LG Display Co., Ltd.Inventors: Ji-Eun Lee, Bum-Sik Kim, Seung-Tae Kim, Won-Kyu Ha, Kil-Hwan Oh
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Publication number: 20140055327Abstract: An organic electroluminescent display device includes an organic electroluminescent diode receiving a driving voltage and a first ground voltage; first and second driving thin film transistors for providing a driving current to the organic electroluminescent diode; a first switching thin film transistor receiving a data voltage and switched by an nth scan signal; a second switching thin film transistor switched by a current providing signal; a third switching thin film transistor receiving a second ground voltage and switched by a selection signal; a fourth switching thin film transistor disposed among an output terminal of the second switching thin film transistor; and a first capacitor disposed among the output terminal of the first switching thin film transistor, the gate terminal of the first driving thin film transistor and the gate terminal of the second driving thin film transistor.Type: ApplicationFiled: August 28, 2013Publication date: February 27, 2014Applicant: LG Display Co., Ltd.Inventors: Seung-Tae KIM, Hae-Jin BAE, Ho-Min LIM, Won-Kyu HA, Hak-Su KIM
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Publication number: 20140022289Abstract: The present invention relates to an organic light emitting diode display device capable of sensing driving current of each pixel with a simple configuration to compensate for a luminance deviation between pixels and a pixel current sensing method thereof. The organic light emitting diode display device includes a display panel including 2N (N being a natural number) pixels that share a reference line though which a reference signal is supplied and are respectively connected to 2N data lines through which data signals are applied, and a data driver for driving the 2N pixels sharing the reference line in a time division manner through the data lines, sensing currents of the time-division-driven 2N pixels as voltages through the shared reference line and outputting the sensed currents, in a sensing mode.Type: ApplicationFiled: December 12, 2012Publication date: January 23, 2014Applicant: LG Display Co., Ltd.Inventors: Ji-Eun Lee, Bum-Sik Kim, Seung-Tae Kim, Won-Kyu Ha, Kil-Hwan Oh
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Patent number: 8547305Abstract: An organic electroluminescent display device includes an organic electroluminescent diode receiving a driving voltage and a first ground voltage; first and second driving thin film transistors for providing a driving current to the organic electroluminescent diode, each of the first and second driving thin film transistors receiving one of the driving voltage and the first ground voltage; a first switching thin film transistor receiving a data voltage and switched by an nth scan signal to output the data voltage; a second switching thin film transistor switched by a current providing signal to provide the one of the driving voltage and the first ground voltage to the second driving thin film transistor; a third switching thin film transistor receiving a second ground voltage and switched by a selection signal to output the second ground voltage to an output terminal of the first switching thin film transistor; a fourth switching thin film transistor disposed among an output terminal of the second switching thType: GrantFiled: May 15, 2009Date of Patent: October 1, 2013Assignee: LG Display Co., Ltd.Inventors: Seung-Tae Kim, Hae-Jin Bae, Ho-Min Lim, Won-Kyu Ha, Hak-Su Kim
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Patent number: 8325113Abstract: An organic electroluminescent display device includes a power supply unit outputting a driving voltage, a base voltage and a reference voltage, a source driving unit outputting a data voltage, a gate driving unit outputting a positive scan signal and a negative scan signal, a timing control unit controlling the source driving unit and the gate driving unit, and a display unit receiving the driving voltage, the base voltage, the reference voltage, the positive scan signal and the negative scan signal, the display unit including an organic light-emitting diode that has driving currents depending on the data voltage.Type: GrantFiled: December 19, 2008Date of Patent: December 4, 2012Assignee: LG Display Co., Ltd.Inventors: Jin-Hyoung Kim, Won-Kyu Ha, Hak-Su Kim, Su-Jin Baek
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Patent number: 8149189Abstract: An organic light emitting diode display includes a first scan switching element controlled in response to a first scan signal from a first scan line and connected between a first data line and a first node, a first storage capacitor connected between the first node and an AC voltage supply line, a first driving switching element controlled in response to a signal applied to the first node and connected between a second node and the AC voltage supply line, a light emitting element connected between a high-level voltage supply line and the second node, a first sensing switching element controlled in response to a first gate signal from a first gate line and connected between the first data line and the second node, a second scan switching element controlled in response to a second scan signal from a second scan line and connected between a second data line and a third node, a second storage capacitor connected between the third node and the AC voltage supply line, and a second driving switching element controllType: GrantFiled: June 10, 2009Date of Patent: April 3, 2012Assignee: LG. Display Co. Ltd.Inventors: Seung-Tae Kim, Han-Jin Bae, Won-Kyu Ha, Ji-Hun Kim
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Patent number: 8059065Abstract: A method and apparatus for driving an electro-luminescence display panel capable of preventing an initial blinking phenomenon occurring at a power application is disclosed. In the method, a first electrode of the EL cell and a ground voltage source are opened during a first period from a turn-on time of a power source to shut off a current path of the EL cells. Then, the first electrode of the pixel matrix and the ground voltage source is shorted during a second period to form a current path such that the EL cells are light-emitted in accordance with a data supplied to the pixel matrix.Type: GrantFiled: February 14, 2005Date of Patent: November 15, 2011Assignee: LG Display Co., Ltd.Inventors: Hyun Joung Kim, Guen Bae Park, Won Kyu Ha
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Patent number: 7978157Abstract: An electro-luminescence display device including red, green and blue reference gamma generators each having three digital analog converters or more in order to generate a reference gamma voltage of low gray level and a reference gamma voltage of high gray level, and at least one integrated circuit to generate a data signal in use of the reference gamma voltage of low gray level and the reference gamma voltage of high gray level. Each reference gamma generator includes a first digital analog converter to divide a voltage supplied to itself in order to generate i numbers of voltage levels, a second digital analog converter to divide a voltage supplied to itself in order to generate j numbers of voltage levels, and a third digital analog converter to receive two voltage levels from the second digital analog converter and to divides the two received voltage levels into j numbers of voltage levels.Type: GrantFiled: March 5, 2009Date of Patent: July 12, 2011Assignee: LG Display Co., Ltd.Inventors: Jung Min Seo, Hyun Joung Kim, Won Kyu Ha, Hak Su Kim, Guen Bae Park, Eun Myung Park, Kee Mog Shin