Patents by Inventor Byung-sik Koh
Byung-sik Koh 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: 20100060554Abstract: In a display apparatus and a driving method thereof, image data corresponding to plural different positions of a display panel are added to each other, and a sum of the image data of a present frame is compared with a sum of the image data of a previous frame to determine whether an image displayed on the display panel is a still image or not. While a still image is displayed, brightness of the display panel is gradually lowered. Accordingly, the display panel may prevent occurrence of afterimages and deterioration of organic electroluminescent light emitting devices, as well as reduce power consumption.Type: ApplicationFiled: March 17, 2009Publication date: March 11, 2010Inventors: Byung-Sik KOH, Si-Duk SUNG, Kwang-Sub SHIN, Jong-Hwa PARK
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Publication number: 20100053039Abstract: A display device includes a plurality of pixels respectively including a plurality of light-emitting elements, a comparing unit for comparing input image signals during a plurality of continuous frames for each pixel and determining whether the input image signals are repeated, a signal converter for converting the input image signal into a compensating image signal for the pixel where the input image signals are repeated during the continuous frames, and a data driver generating a data signal corresponding to the compensation image signal to supply the data signal to the pixel.Type: ApplicationFiled: August 25, 2009Publication date: March 4, 2010Inventors: Jong-Hwa Park, Kwang-Sub Shin, Byung-Sik Koh, Si-Duk Sung
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Patent number: 7633088Abstract: A display device including a plurality of pixels is disclosed. Each of the pixels includes a switching transistor, a plurality of scanning lines connected to the switching transistors and a plurality of data lines connected to the switching transistors. The scanning lines transmit a gate turn-on voltage that turns on the switching transistors and a gate turn-off voltage that turns off the switching transistors and the data lines transmit a data voltage. The gate turn-on voltage is determined based on a maximum value of the data voltage. The gate turn-on voltage based on the maximum value of the data voltage results in high luminance and less crosstalk phenomenon.Type: GrantFiled: October 27, 2006Date of Patent: December 15, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Parikh Kunjal, Byung-Sik Koh, Beohm-Rock Choi, Joon-Hoo Choi, Joon-Chul Goh
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Publication number: 20090256785Abstract: A display device and a method of driving the same are provided. The display device includes a scan driver that generates a plurality of scanning signals, a data driver that generates a data voltage, and a plurality of pixels that receive the data voltage according to the scanning signal and that display luminance corresponding to the data voltage. Each pixel receives its own data voltage and a data voltage of other pixels while displaying a black color when its own scanning signal is in a first state, and stops reception of the data voltage and displays luminance corresponding to its own data voltage when its own scanning signal is in a second state.Type: ApplicationFiled: November 19, 2008Publication date: October 15, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Si-Duk SUNG, Byung-Sik Koh, Young-II Kim, Kyong-Tae Park
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Patent number: 7557382Abstract: A display device according to the present invention comprises an insulating substrate; a switching thin film transistor formed on the insulating substrate for receiving a data voltage has a first semiconductor layer comprising amorphous silicon; a driving thin film transistor formed on the insulating substrate, having a control terminal connected with an output terminal of the switching thin film transistor and includes a second semiconductor layer comprising poly silicon; a light sensor formed on the insulating substrate and comprises a third semiconductor layer and a sensor input terminal and a sensor output terminal electrically connected with the third semiconductor layer; an insulating layer formed on the light sensor; a first electrode formed on the insulating layer and electrically connected with an output terminal of the driving thin film transistor; an organic layer formed on the first electrode and comprises a light emitting layer; a second electrode formed on the organic layer; and a controller whiType: GrantFiled: February 5, 2007Date of Patent: July 7, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Byung-sik Koh, Joon-hoo Choi, Jong-moo Huh, Joon-chul Goh, Young-soo Yoon
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Publication number: 20080048953Abstract: A display panel includes a display area and a peripheral area, and a power applying terminal portion is formed on the peripheral area. The frame includes a cover portion covering an edge of the display panel, and a power connecting terminal portion formed on an inner surface of the cover portion and electrically connected to the power applying terminal portion. The power supply part is disposed on the frame and supplies a driving power to the power connecting terminal portion.Type: ApplicationFiled: August 3, 2007Publication date: February 28, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.,Inventors: Byung-Sik KOH, Chun-Seok KO, Si-Duk SUNG
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Publication number: 20080048948Abstract: A display device includes a display panel having a display region where an organic light emitting layer is formed and a non-display region, a circuit board which generates a reference voltage and a panel driving signal to be applied to the display panel, and a flexible member which connects the display panel to the circuit board. The display panel further includes a reference voltage pad which receives the reference voltage and formed on the non-display region, and the flexible member includes a flexible film, a data driving part seated on the flexible film, and a reference voltage lead formed on the flexible film to be connected to the reference voltage pad.Type: ApplicationFiled: July 17, 2007Publication date: February 28, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byung-sik KOH, Joon-chul GOH
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Publication number: 20080036707Abstract: A more simplified organic light-emitting display (OLED) apparatus includes a display panel, gate and data driving circuit parts. The display panel includes an organic light-emitting element having an organic light-emitting layer disposed between first and second electrodes, to emit light. Driving and common voltages are respectively applied to the first and second electrodes. A gate driving circuit part is connected to a first side of the display panel to apply a gate signal, and the gate circuit driving part also applies the common voltage to a first common electrode formed at the first side and is electrically connected to the second electrode. A data driving circuit part is connected to a second side of the display panel to apply a data signal, and the data driving part also applies the common voltage to a second common electrode formed at a third side and electrically connected to the second electrode.Type: ApplicationFiled: August 8, 2007Publication date: February 14, 2008Inventors: Si-Duk SUNG, Byung-Sik Koh
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Publication number: 20080024056Abstract: An organic light emitting diode display includes a display panel having a display area with a plurality of thin film transistors and a peripheral area provided along a circumference of the display area, an emission layer formed within the display area, a driver formed in the peripheral area which applies display signals including gate signals and data signals to the thin film transistors, a driving voltage pad formed in the peripheral area which applies a driving voltage to the display area, a common voltage pad formed in the peripheral area which applies a common voltage to the display area, a main connector connected to an external voltage source, and a flexible conductive film including a conductive layer electrically connecting between at least one of the driving voltage pad and the common voltage pad and the main connector. The organic light emitting diode display facilitates modulation due to a simple structure, and improves a voltage drop phenomenon.Type: ApplicationFiled: June 12, 2007Publication date: January 31, 2008Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Si-Duk SUNG, Byung-Sik KOH
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Publication number: 20080024526Abstract: An organic light emitting diode (OLED) display and a method of driving the same are provided. The OLED display includes: a plurality of pixels arrayed in a matrix, each of which includes a switching transistor and a driving transistor; a plurality of data lines connected to the switching transistors, which transmit a data voltage to the pixels; a plurality of driving voltage lines that transmit a driving voltage to the driving transistors; a voltage generator that applies the driving voltage to the driving voltage lines; a current sensing unit that senses a driving current that flows from the voltage generator to the driving voltage lines; a gray voltage generator that generates a gray voltage depending on a change in the driving current; and a data driver that converts an input image signal into the data voltage on the basis of the gray voltage and applies the data voltage to the data lines.Type: ApplicationFiled: June 28, 2007Publication date: January 31, 2008Inventors: Chun-Seok KO, Byung-Sik Koh, Si-Duk Sung
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Publication number: 20080012474Abstract: A display device includes; an insulating substrate, a display element which defines a display region and includes an organic light emitting layer which is formed on the insulating substrate, a first circuit board disposed parallel with a first side of the insulating substrate, a reference voltage pad formed on a circumference of the display region and which is electrically connected to the display element, and a first flexible member which includes a first part which adheres to the first circuit board and a second part connected to the reference voltage pad along a second side of the face of the insulating substrate.Type: ApplicationFiled: July 9, 2007Publication date: January 17, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Si-duk SUNG, Byung-sik KOH
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Publication number: 20080007492Abstract: An OLED display includes a pixel having a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, each of which displays a different color, a gate line for transmitting gate signals to the pixel, a data line for transmitting data signals to the pixel, a first driving voltage line that transmits a driving voltage to the pixel and is substantially parallel to the data line, and a second driving voltage line that is connected to the first driving voltage line and is substantially parallel to the gate line.Type: ApplicationFiled: November 17, 2006Publication date: January 10, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Byung-Sik Koh, Nam-Deog Kim, Beohm-Rock Choi, Kyeng-Eun Roh, Kwang-Chul Jung, Joon-Hoo Choi, Jong-Moo Huh, Seung-Kyu Park, Joon-Chul Goh, Young-Soo Yoon
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Publication number: 20080001940Abstract: A display device includes a display panel having a display region formed with a plurality of thin film transistors, a light emitting layer disposed in the display region, and a driver supplying a driving signal including a gate signal and a data signal to the thin film transistors. At least one voltage pad is disposed outside of the display region on the display panel to supply a reference voltage to the display region, a power generator generates the reference voltage, and a flexible film is connected between the voltage pad and the power generator to transmit the reference voltage. At least one of the driver and the power generator includes an external power input unit that receives external power.Type: ApplicationFiled: June 26, 2007Publication date: January 3, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byung-Sik KOH, Chun-Seok KO, Byoung-Seong JEONG, Si-Duk SUNG
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Publication number: 20070278952Abstract: A display device includes an insulating substrate having an upper surface and a lower surface opposing the upper surface, a display element including a first electrode, an organic light emitting layer on the first electrode, and a second electrode on the organic light emitting layer, a first film connected to a first side of the upper surface, and a first circuit substrate connected to the first film and including a first surface facing the display element, a second surface opposing the first surface, and an electric element protruding from the second surface.Type: ApplicationFiled: May 30, 2007Publication date: December 6, 2007Applicant: Samsung Electronics Co., Ltd.Inventors: Si-Duk Sung, Byung-Sik Koh
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Publication number: 20070181881Abstract: A display device according to the present invention comprises an insulating substrate; a switching thin film transistor formed on the insulating substrate for receiving a data voltage has a first semiconductor layer comprising amorphous silicon; a driving thin film transistor formed on the insulating substrate, having a control terminal connected with an output terminal of the switching thin film transistor and includes a second semiconductor layer comprising poly silicon; a light sensor formed on the insulating substrate and comprises a third semiconductor layer and a sensor input terminal and a sensor output terminal electrically connected with the third semiconductor layer; an insulating layer formed on the light sensor; a first electrode formed on the insulating layer and electrically connected with an output terminal of the driving thin film transistor; an organic layer formed on the first electrode and comprises a light emitting layer; a second electrode formed on the organic layer; and a controller whiType: ApplicationFiled: February 5, 2007Publication date: August 9, 2007Inventors: Byung-sik Koh, Joon-hoo Choi, Jong-moo Huh, Joon-chul Goh, Young-soo Yoon
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Publication number: 20070176860Abstract: A display apparatus includes an insulating substrate having a display region, a light emitting layer formed in the display region, a first voltage pad applying a reference voltage to the display region, the first voltage pad being formed in a non-display region on the insulating substrate, a frame supporting the insulating substrate and including an insulating material, a second voltage pad formed on the frame and electrically connected with the first voltage pad and a power supplying part supplying power to the second voltage pad, the power supplying part being formed on the frame.Type: ApplicationFiled: February 1, 2007Publication date: August 2, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.,Inventors: Byung-sik KOH, Chun-seok KO, Si-duk SUNG
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Publication number: 20070159078Abstract: An organic light emitting diode (OLED) display that dissipates heat with an improved efficiency is presented. The OLED display includes an OLED panel that displays an image, a heat sink that is attached the OLED panel, and a heat transfer pad that is positioned between the heat sink and the OLED panel, wherein the heat transfer pad is shaped to cover a position of the heat generating unit of the OLED panel.Type: ApplicationFiled: December 20, 2006Publication date: July 12, 2007Inventors: Kyong-Tae Park, Byung-Sik Koh
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Publication number: 20070103407Abstract: A display device includes a case in which a storage space is formed and an organic light emitting diode (“OLED”) panel inserted into the storage space. The case includes a front face and a rear face, whereby one of the front and the rear face includes an opening defining a display region and a slit for communicating the storage space and an outside of the case formed at one side of the case.Type: ApplicationFiled: October 24, 2006Publication date: May 10, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byung-sik Koh, Nam-deog KIM
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Publication number: 20070096099Abstract: A display device including a plurality of pixels is disclosed. Each of the pixels includes a switching transistor, a plurality of scanning lines connected to the switching transistors and a plurality of data lines connected to the switching transistors. The scanning lines transmit a gate turn-on voltage that turns on the switching transistors and a gate turn-off voltage that turns off the switching transistors and the data lines transmit a data voltage. The gate turn-on voltage is determined based on a maximum value of the data voltage. The gate turn-on voltage based on the maximum value of the data voltage results in high luminance and less crosstalk phenomenon.Type: ApplicationFiled: October 27, 2006Publication date: May 3, 2007Applicant: Samsung Electronics Co., Ltd.Inventors: Parikh Kunjal, Byung-Sik Koh, Beohm-Rock Choi, Joon-Hoo Cho, Joon-Chul Goh
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Publication number: 20060061292Abstract: A display device is provided, which includes: a plurality of pixels, each pixel including a light emitting element; a signal controller modifying the input image signals based on an accumulated time of driving the light emitting elements; and a data driver generating data signals based on the modified image signals and supplying the data signals to the pixels.Type: ApplicationFiled: September 16, 2005Publication date: March 23, 2006Inventors: Byung-Sik Koh, Joon-Chul Goh, Nam-Deog Kim, Chun-Seok Ko, Beohm-Rock Choi