Patents by Inventor Wang Jo Lee
Wang Jo 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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Publication number: 20140077173Abstract: A thin film transistor includes a substrate, a gate electrode on the substrate, an active layer spaced from the gate electrode, a source electrode and a drain electrode spaced from the gate electrode and coupled to the active layer, a gate wiring at a same layer as the gate electrode and coupled to the gate electrode, and first conductive members electrically coupled to, and overlapping, the gate wiring.Type: ApplicationFiled: March 12, 2013Publication date: March 20, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jung-Bae Kim, Yong-Sung Park, Wang-Jo Lee, Hae-Yeon Lee, Keum-Nam Kim
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Publication number: 20140070709Abstract: A method of arranging power-lines between a power supply circuit and a display panel in an organic light emitting display device, the method including: substantially symmetrically arranging first high power-lines between the power supply circuit and the display panel, the first high power-lines being configured to concurrently transmit a first high power voltage to first pixels; substantially symmetrically arranging second high power-lines outside of the first high power-lines between the power supply circuit and the display panel, the second high power-lines being configured to concurrently transmit a second high power voltage to second pixels; and substantially symmetrically arranging third high power-lines outside of the second high power-lines between the power supply circuit and the display panel, the third high power-lines being configured to concurrently transmit a third high power voltage to third pixels.Type: ApplicationFiled: June 6, 2013Publication date: March 13, 2014Inventors: Hae-Yeon LEE, Young-In HWANG, Yong-Jae KIM, Wang-Jo LEE
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Patent number: 8581811Abstract: The organic light emitting display device according to the present invention includes a scan driver for supplying a scan signal to scan lines during a frame time-divided into a plurality of subframes, a data driver coupled to output lines for supplying data signals on each of the output lines, data distributors coupled to the output lines for distributing the data signals to data lines, concurrently, in synchronization with the scan signal, and pixels located at crossing regions of the data lines and the scan lines. Each of the data distributors includes a sampling latch for distributing the data signals to different channels and for storing the data signals, and a holding latch coupled to the sampling latch for supplying the data signals of the channels to the data lines concurrently.Type: GrantFiled: October 10, 2008Date of Patent: November 12, 2013Assignee: Samsung Display Co., Ltd.Inventors: Wang-Jo Lee, Sang-Moo Choi
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Patent number: 8552934Abstract: An organic light emitting display and a driving method thereof that reduces false contour noise and the occurrence of a stripe pattern generated in a digital driving manner. The organic light emitting display includes a scan driver for supplying a scan signal to scan lines, a data driver for supplying a data signal to data lines, and pixels coupled to the scan lines and the data lines. Each of the pixels includes an organic light emitting diode. The organic light emitting diodes of the pixels coupled to a scan line are alternately positioned in a first horizontal line and a second horizontal line adjacent to the first horizontal line, respectively.Type: GrantFiled: April 15, 2009Date of Patent: October 8, 2013Assignee: Samsung Display Co., Ltd.Inventors: Wang-Jo Lee, Sang-Moo Choi
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Publication number: 20130208015Abstract: An organic light emitting diode (OLED) display is disclosed. In one embodiment, the OLED display includes a panel including pixels which are configured to control an amount of current that flows from a first power source to a second power source to generate an image of predetermined brightness. The display may also include at least one first power source line formed on a top of the panel and at least one second power source line positioned on a bottom of the panel to face the first power source line. The display may further include a first switch configured to alternately supply the first power source to the first power source line and the second power source line.Type: ApplicationFiled: April 30, 2012Publication date: August 15, 2013Applicant: Samsung Mobile Display Co., Ltd.Inventors: Ki-Wook Kim, Wang-Jo Lee, Dae-Hyun Noh
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Patent number: 8508525Abstract: An organic light emitting diode (OLED) display includes a display unit including a plurality of pixels, a plurality of scan lines, and a plurality of data lines, a data driver transmitting a plurality of data signals to the plurality of data lines, a scan driver transmitting a plurality of scan signals to the plurality of scan lines, a compensation controller supplying a predetermined first current to each OLED in each of the plurality of pixels during a sensing period for measuring a driving voltage of the OLED for each of a plurality of pixels, receiving the driving voltage of the OLED supplied with the first current, and outputting measuring data for the transmitted driving voltage; and a signal controller compensating an input video signal according to the measuring data to generate image data. The compensation controller is separate from and external to the data driver.Type: GrantFiled: January 10, 2011Date of Patent: August 13, 2013Assignee: Samsung Display Co., Ltd.Inventors: Naoaki Komiya, Choon-Yul Oh, Joo-Hyeon Jeong, Myoung-Hwan Yoo, Wang-Jo Lee, Ho-Ryun Chung, Chang-Ho Hyun, Woung Kim, In-Ho Choi
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Publication number: 20130201087Abstract: A pixel includes a first transistor coupled between a first power source and a first node, the first transistor including a gate electrode coupled to a second node, an organic light emitting diode (OLED) coupled between the first node and a second power source, a second transistor for supplying a data signal to the second node in response to a scan signal, a third transistor having a source electrode and a drain electrode electrically coupled to each other, the third transistor being coupled to the first power source and the second node, and a fourth transistor having a source electrode and a drain electrode electrically coupled to each other, the fourth transistor being coupled between the second node and the first node.Type: ApplicationFiled: May 9, 2012Publication date: August 8, 2013Inventors: Jeong-Keun AHN, Wang-Jo LEE
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Publication number: 20130193439Abstract: A semiconductor device includes a semiconductor layer on a substrate, a gate electrode electrically insulated from the semiconductor layer by a gate insulating layer, an insulating layer on the gate insulating layer and on the gate electrode, and a source electrode and a drain electrode on the insulating layer, the source and drain electrode being connected to the semiconductor layer. The source electrode overlaps at least a part of the gate electrode. The source electrode, the insulating layer, and the gate electrode overlap each other so as to provide a capacitor.Type: ApplicationFiled: June 21, 2012Publication date: August 1, 2013Inventors: Jeong-Keun Ahn, Wang-Jo Lee
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Patent number: 8497627Abstract: A display device includes: a substrate; a display unit that is formed over the substrate; a driving driver positioned outside the display unit and including a plurality of signal lines; a sealing substrate fixed to the substrate by a bonding layer surrounding the display unit and the driving driver. The sealing layer includes a composite member including a resin matrix and a plurality of carbon fibers and a first metal layer positioned over the composite member. The display device further includes a plurality of pads positioned outside the bonding layer and electrically connected to the plurality of signal lines; and a plurality of second metal layers positioned over one surface of the composite member facing the plurality of pads and connected to the plurality of pads, respectively, through a conductive bonding layer.Type: GrantFiled: July 14, 2011Date of Patent: July 30, 2013Assignee: Samsung Display Co., Ltd.Inventors: Hae-Yeon Lee, Wang-Jo Lee
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Publication number: 20130181967Abstract: An organic light emitting display device includes a pixel unit, a scan driver, a data driver and a voltage generation unit. The pixel unit includes a plurality of pixels coupled to a plurality of scan lines and a plurality of data lines, where each of the pixels includes an organic light emitting diode. The voltage generation unit is coupled to the pixel unit through one power line which provides the common supply voltage to the pixels. Each of the plurality of pixels includes a voltage drop unit, each voltage drop unit generates a respective drive voltage by dropping a voltage of the common supply voltage, and turns on the organic light emitting diode to emit light with a luminance corresponding to a voltage of the drive voltage based on a logic level of the data signal. The organic light emitting display device increases an aperture ratio.Type: ApplicationFiled: March 26, 2012Publication date: July 18, 2013Applicant: Samsung Mobile Display Co., Ltd.Inventors: Hae-Yeon Lee, Wang-Jo Lee, Yong-Jae Kim, Jin-Gon Oh
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Patent number: 8319761Abstract: An organic light emitting display configured to be driven using a frame divided into a plurality of sub-frames includes a data driver configured to supply a plurality of data signals to output lines during a first period of one horizontal period of the sub-frame, a scan driver configured to sequentially supply a scan signal to scan lines during a second period of the one horizontal period of the sub-frame, a demultiplexer coupled to each output line, the demultiplexer being configured to supply the data signals to a plurality of data lines, buffers configured to supply buffers supplying signals from the demultiplexers to the data lines, the buffers including PMOS transistors, and pixels disposed at intersections of the scan lines and the data lines, the pixels being configured to display images corresponding to the data signals.Type: GrantFiled: July 24, 2008Date of Patent: November 27, 2012Assignee: Samsung Display Co., Ltd.Inventors: Wang-jo Lee, Bo-yong Chung, Sang-moo Choi, Hyung-soo Kim
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Patent number: 8289237Abstract: A pixel of a simplified configuration, and an organic light emitting display using the same are disclosed. The pixel includes an organic light emitting diode; a first transistor connected with a scan line and a data line and turned on when a scan signal is supplied to the scan lines; a storage capacitor having one terminal connected to an electrode of the first transistor and the other terminal connected to a reset line; and a second transistor for controlling an electric current that flows from a first power source to a second power source through the organic light emitting diode according to a voltage charged in the storage capacitor, wherein the second transistor is turned-off when a reset signal is supplied to the reset line.Type: GrantFiled: December 19, 2007Date of Patent: October 16, 2012Assignee: Samsung Display Co., Ltd.Inventors: Sang-moo Choi, Wang-jo Lee, Bo-yong Chung
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Patent number: 8269803Abstract: A display device includes a plurality of pixels, each of said plurality of pixels includes a driving transistor and a light emitting diode, a compensator to receive first and second pixel currents generated by the plurality of pixels according to first and second data voltages respectively applied to the plurality of pixels, the compensator to calculate an image data compensation amount to compensate for variations in characteristics of the driving transistor of each of said plurality of pixels and a data selector to transmit the first and second data voltages to the plurality of pixels and to transmit the first and second pixel currents to the compensator, the compensator to measure the first and second pixel currents generated as a result of the first and second data voltages corresponding to different gray scale levels and to calculate an actual threshold voltage and mobility of the driving transistor of each of the pixels, the compensator including a measurement resistor, the compensator to control a resiType: GrantFiled: January 6, 2011Date of Patent: September 18, 2012Assignee: Samsung Mobile Display Co., Ltd.Inventors: Myoung-Hwan Yoo, Choon-Yul Oh, Naoaki Komiya, Ho-Ryun Chung, Joo-Hyeon Jeong, Wang-Jo Lee, In-Ho Choi, Chang-Ho Hyun, Woung Kim
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Publication number: 20120211752Abstract: An organic electroluminescent display device including a plurality of scan lines and a plurality of data lines crossing the scan lines, a plurality of pixels at regions defined by the scan lines and the data lines, and one or more thin-film transistors (TFTs) for selectively applying voltages to each of the pixels, wherein the data lines are successively located at a side of the pixels, and a first TFT of the TFTs is located at least partially between an area corresponding to an nth data line of the data lines and an area corresponding to an (n?1)th data line of the data lines, the nth data line and the (n?1)th data line being successively positioned.Type: ApplicationFiled: September 23, 2011Publication date: August 23, 2012Inventors: Na-Young Kim, Ki-Nyeng Kang, Wang-Jo Lee, In-Ho Choi, Jin-Gon Oh
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Patent number: 8242980Abstract: A pixel circuit includes first, second, and third transistors, and first and second capacitors, wherein the first transistor is controlled by a scan line and is configured to controllably couple a data line to the first capacitor and a gate electrode of the second transistor, the second transistor is controlled by a voltage provided by the first and second capacitors, the third transistor is controlled by the scan line and is configured to controllably couple a first power supply to the second capacitor, and the first power supply is controllably coupled to a light source by the second transistor.Type: GrantFiled: July 19, 2007Date of Patent: August 14, 2012Assignee: Samsung Mobile Display Co., Ltd.Inventors: Sang Moo Choi, Wang-Jo Lee
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Publication number: 20120176299Abstract: An organic light emitting diode display includes: a panel; a data driver connected to a data line formed on the panel; a gate driver crossing the data line in an insulated manner and connected to gate lines formed on the panel; an input line for receiving clock signals from the outside; a first connecting line electrically connected to the input line to supply the clock signal to the gate driver; a second connecting line electrically connected to the input line; and a third connecting line extended from the second connecting line to electrically connect the second connecting line and the first connecting line.Type: ApplicationFiled: November 29, 2011Publication date: July 12, 2012Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventors: Ki-Nyeng Kang, Na-Young Kim, Wang-Jo Lee, In-Ho Choi, Yong-Sung Park
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Publication number: 20120153814Abstract: A display device includes: a substrate; a display unit that is formed over the substrate; a driving driver positioned outside the display unit and including a plurality of signal lines; a sealing substrate fixed to the substrate by a bonding layer surrounding the display unit and the driving driver. The sealing layer includes a composite member including a resin matrix and a plurality of carbon fibers and a first metal layer positioned over the composite member. The display device further includes a plurality of pads positioned outside the bonding layer and electrically connected to the plurality of signal lines; and a plurality of second metal layers positioned over one surface of the composite member facing the plurality of pads and connected to the plurality of pads, respectively, through a conductive bonding layer.Type: ApplicationFiled: July 14, 2011Publication date: June 21, 2012Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventors: Hae-Yeon Lee, Wang-Jo Lee
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Publication number: 20120104939Abstract: An organic light emitting display device is disclosed. In certain embodiments, the display has improved quality and lower cost because the subpixels of the display are oriented to have their longer sides parallel to the longer sides of the display. With the orientation, during crystallization of the subpixels, laser radiation is projected across the display device in a direction parallel to the short sides of the display device. Accordingly, less expensive laser equipment producing a shorter beam width may be used.Type: ApplicationFiled: July 6, 2011Publication date: May 3, 2012Applicant: Samsung Mobile Display Co., Ltd.Inventors: Yong-Sung Park, Wang-Jo Lee, Ki-Nyeng Kang, Ki-Wook Kim
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Publication number: 20120050251Abstract: A scan driver includes: a plurality of scan driving blocks including an output terminal outputting a scan signal to a scan line; a first transistor transmitting a voltage of a power source to the output terminal; a second transistor transmitting a clock signal to the output terminal; and a third transistor including a gate electrode connected to a node formed with a gate-on voltage turning on the second transistor, one terminal connected to the power source, and the other terminal connected to the gate electrode of the first transistor. The scan driver may reduce the influence of a leakage current even though application of the scan signal is increased, and a scan signal of a uniform voltage level may be output.Type: ApplicationFiled: July 27, 2011Publication date: March 1, 2012Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventors: Wang-Jo Lee, Hyung-Soo Kim, In-Ho Choi, Choon-Yul OH, Ho-Ryun Chung, Joo-Hyeon Jeong, Myoung-Hwan Yoo, Jin-Woo Kim, Naoaki Komiya
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Publication number: 20110298836Abstract: An organic light emitting diode display is disclosed. A signal from the pixels in the display is transmitted to a circuit which compensates the image data according to the signal, which is indicative of one or more of ageing of the organic light emitting diodes, the threshold voltages of the driving transistors, and current mobility of the driving transistors.Type: ApplicationFiled: January 25, 2011Publication date: December 8, 2011Applicant: Samsung Mobile Display Co., Ltd.Inventors: Naoaki Komiya, Choon-Yul Oh, Ho-Ryun Chung, Myoung-Hwan Yoo, Joo-Hyeon Jeong, Wang-Jo Lee, In-Ho Choi, Chang-Ho Hyun, Woung Kim