Patents by Inventor Sang-Jae Yeo
Sang-Jae Yeo 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: 11972719Abstract: A display device and a method of driving a display device are disclosed.Type: GrantFiled: July 19, 2022Date of Patent: April 30, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Su Min Yang, Seung Ho Park, Sung Hoon Bang, Sang Jae Yeo
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Publication number: 20230306887Abstract: A display device includes a data line, a pixel electrically connected to the data line, a data driver for outputting a data voltage, and a transmitter electrically connected between an output terminal of the data driver and the data line. The transmitter may transmit an instance of the data voltage to the data line in a first period. The transmitter may amplify a second instance of the data voltage to generate a reference voltage and then transmit the reference voltage to the data line in a second period different from the first period. The pixel includes a light emitting element for emitting light in response to the first instance of the data voltage. A voltage level of the reference voltage may be higher than a voltage level of the data voltage.Type: ApplicationFiled: June 5, 2023Publication date: September 28, 2023Inventors: Seok Gyu BAN, Kyung Man KIM, Sang Jae YEO
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Patent number: 11705040Abstract: A display device includes a data line, a pixel electrically connected to the data line, a data driver for outputting a data voltage, and a transmitter electrically connected between an output terminal of the data driver and the data line. The transmitter may transmit an instance of the data voltage to the data line in a first period. The transmitter may amplify a second instance of the data voltage to generate a reference voltage and then transmit the reference voltage to the data line in a second period different from the first period. The pixel includes a light emitting element for emitting light in response to the first instance of the data voltage. A voltage level of the reference voltage may be higher than a voltage level of the data voltage.Type: GrantFiled: April 1, 2022Date of Patent: July 18, 2023Assignee: Samsung Display Co., Ltd.Inventors: Seok Gyu Ban, Kyung Man Kim, Sang Jae Yeo
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Patent number: 11670237Abstract: A display device includes a display unit, a scan driver, and a data driver. The display unit includes pixels coupled to scan lines, sensing scan lines, data lines, and sensing lines. The scan driver supplies a scan signal to the scan lines, and supplies a sensing scan signal to the sensing scan lines. The data driver supplies an image data voltage to the data lines, and detects sensing values of the pixels on a pixel column basis through the sensing lines during a sensing period. The data driver includes an analog-to-digital converter which converts the detected sensing values into digital data during the sensing period and outputs sensing data. The analog-to-digital converter pauses the detection of the sensing values during a first period of the sensing period.Type: GrantFiled: November 9, 2020Date of Patent: June 6, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jung Ki Min, Wook Lee, Sang Jae Yeo
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Patent number: 11665941Abstract: A method of compensating for degradation of a display device includes sensing a first sensing current flowing through a sensing line connected to a pixel, which includes a programming period for writing a data voltage of a predetermined color to a storage capacitor of the pixel, sensing a sensing voltage of the sensing line, which includes a period for charging a line capacitor connected to the sensing line, estimating a voltage of an anode electrode of an organic light emitting diode using a second sensing current estimated from the first sensing current and the sensing voltage, and determining a degradation compensation value using the voltage of the anode electrode.Type: GrantFiled: January 11, 2022Date of Patent: May 30, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kyung Man Kim, Seok Gyu Ban, Sang Jae Yeo
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Publication number: 20230119909Abstract: A display device includes: pixels connected to corresponding scan lines, control lines, data lines, and sensing lines, a scan driver which supplies a scan signal to the scan lines, and supplies a control signal to the corresponding control lines, a data driver which supplies one of an image data signal and a sensing data signal to the corresponding data lines, and a sensing driver which senses characteristics of driving transistors of different pixels of the pixels in a previous sensing period and a current sensing period, and determines a final sensing value of a target pixel of the pixels in the current sensing period, based on a difference between a previous sensing value of the target pixel, which is determined based on the sensing in the previous sensing period, and a preliminary sensing value of the target pixel, which is calculated based on the sensing in the current sensing period.Type: ApplicationFiled: July 19, 2022Publication date: April 20, 2023Inventors: Su Min YANG, Seung Ho PARK, Sung Hoon BANG, Sang Jae YEO
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Publication number: 20220223088Abstract: A display device includes a data line, a pixel electrically connected to the data line, a data driver for outputting a data voltage, and a transmitter electrically connected between an output terminal of the data driver and the data line. The transmitter may transmit an instance of the data voltage to the data line in a first period. The transmitter may amplify a second instance of the data voltage to generate a reference voltage and then transmit the reference voltage to the data line in a second period different from the first period. The pixel includes a light emitting element for emitting light in response to the first instance of the data voltage. A voltage level of the reference voltage may be higher than a voltage level of the data voltage.Type: ApplicationFiled: April 1, 2022Publication date: July 14, 2022Inventors: Seok Gyu BAN, Kyung Man KIM, Sang Jae YEO
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Publication number: 20220130942Abstract: A method of compensating for degradation of a display device includes sensing a first sensing current flowing through a sensing line connected to a pixel, which includes a programming period for writing a data voltage of a predetermined color to a storage capacitor of the pixel, sensing a sensing voltage of the sensing line, which includes a period for charging a line capacitor connected to the sensing line, estimating a voltage of an anode electrode of an organic light emitting diode using a second sensing current estimated from the first sensing current and the sensing voltage, and determining a degradation compensation value using the voltage of the anode electrode.Type: ApplicationFiled: January 11, 2022Publication date: April 28, 2022Inventors: Kyung Man KIM, Seok Gyu BAN, Sang Jae YEO
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Patent number: 11308837Abstract: A display device includes a data line, a pixel electrically connected to the data line, a data driver for outputting a data voltage, and a transmitter electrically connected between an output terminal of the data driver and the data line. The transmitter may transmit an instance of the data voltage to the data line in a first period. The transmitter may amplify a second instance of the data voltage to generate a reference voltage and then transmit the reference voltage to the data line in a second period different from the first period. The pixel includes a light emitting element for emitting light in response to the first instance of the data voltage. A voltage level of the reference voltage may be higher than a voltage level of the data voltage.Type: GrantFiled: April 14, 2020Date of Patent: April 19, 2022Inventors: Seok Gyu Ban, Kyung Man Kim, Sang Jae Yeo
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Patent number: 11264445Abstract: A method of compensating for degradation of a display device includes sensing a first sensing current flowing through a sensing line connected to a pixel, which includes a programming period for writing a data voltage of a predetermined color to a storage capacitor of the pixel, sensing a sensing voltage of the sensing line, which includes a period for charging a line capacitor connected to the sensing line, estimating a voltage of an anode electrode of an organic light emitting diode using a second sensing current estimated from the first sensing current and the sensing voltage, and determining a degradation compensation value using the voltage of the anode electrode.Type: GrantFiled: March 17, 2020Date of Patent: March 1, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kyung Man Kim, Seok Gyu Ban, Sang Jae Yeo
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Publication number: 20210287608Abstract: A display device includes a display unit, a scan driver, and a data driver. The display unit includes pixels coupled to scan lines, sensing scan lines, data lines, and sensing lines. The scan driver supplies a scan signal to the scan lines, and supplies a sensing scan signal to the sensing scan lines. The data driver supplies an image data voltage to the data lines, and detects sensing values of the pixels on a pixel column basis through the sensing lines during a sensing period. The data driver includes an analog-to-digital converter which converts the detected sensing values into digital data during the sensing period and outputs sensing data. The analog-to-digital converter pauses the detection of the sensing values during a first period of the sensing period.Type: ApplicationFiled: November 9, 2020Publication date: September 16, 2021Inventors: Jung Ki MIN, Wook LEE, Sang Jae YEO
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Publication number: 20210090482Abstract: A display device includes a data line, a pixel electrically connected to the data line, a data driver for outputting a data voltage, and a transmitter electrically connected between an output terminal of the data driver and the data line. The transmitter may transmit an instance of the data voltage to the data line in a first period. The transmitter may amplify a second instance of the data voltage to generate a reference voltage and then transmit the reference voltage to the data line in a second period different from the first period. The pixel includes a light emitting element for emitting light in response to the first instance of the data voltage. A voltage level of the reference voltage may be higher than a voltage level of the data voltage.Type: ApplicationFiled: April 14, 2020Publication date: March 25, 2021Inventors: Seok Gyu BAN, Kyung Man KIM, Sang Jae YEO
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Publication number: 20210028265Abstract: A method of compensating for degradation of a display device includes sensing a first sensing current flowing through a sensing line connected to a pixel, which includes a programming period for writing a data voltage of a predetermined color to a storage capacitor of the pixel, sensing a sensing voltage of the sensing line, which includes a period for charging a line capacitor connected to the sensing line, estimating a voltage of an anode electrode of an organic light emitting diode using a second sensing current estimated from the first sensing current and the sensing voltage, and determining a degradation compensation value using the voltage of the anode electrode.Type: ApplicationFiled: March 17, 2020Publication date: January 28, 2021Inventors: Kyung Man KIM, Seok Gyu BAN, Sang Jae YEO
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Patent number: 10783827Abstract: A display device includes pixels connected to data lines and scan lines, a first compensator which is connected to sensing lines and senses deviation information of the sensing lines while supplying different voltages to adjacent sensing lines, and a sensing unit which is connected to the first compensator and senses characteristic information of each of the pixels.Type: GrantFiled: September 8, 2017Date of Patent: September 22, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jeong Hwan Shin, Sung Hoon Bang, Sang Jae Yeo, Oh Jo Kwon
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Patent number: 10553156Abstract: A display device includes: a first pixel row including n pixels coupled to a first scan line; a second pixel row including m pixels coupled to a second scan line; a first power voltage source for supplying a first power voltage to the pixels of the first pixel row and the second pixel row through a first power voltage line; a current sensor for sensing a value of a line current flowing between the first power voltage line and a selected pixel row among the first pixel row and the second pixel row; and a timing controller for calculating a converted current value of the selected pixel row, wherein n is a natural number, and m is a natural number greater than n.Type: GrantFiled: October 16, 2018Date of Patent: February 4, 2020Assignee: Samsung Display Co., Ltd.Inventors: Sang Jae Yeo, Wook Lee
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Publication number: 20190164484Abstract: A display device includes: a first pixel row including n pixels coupled to a first scan line; a second pixel row including m pixels coupled to a second scan line; a first power voltage source for supplying a first power voltage to the pixels of the first pixel row and the second pixel row through a first power voltage line; a current sensor for sensing a value of a line current flowing between the first power voltage line and a selected pixel row among the first pixel row and the second pixel row; and a timing controller for calculating a converted current value of the selected pixel row, wherein n is a natural number, and m is a natural number greater than n.Type: ApplicationFiled: October 16, 2018Publication date: May 30, 2019Inventors: Sang Jae YEO, Wook LEE
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Publication number: 20180082639Abstract: A display device includes pixels connected to data lines and scan lines, a first compensator which is connected to sensing lines and senses deviation information of the sensing lines while supplying different voltages to adjacent sensing lines, and a sensing unit which is connected to the first compensator and senses characteristic information of each of the pixels.Type: ApplicationFiled: September 8, 2017Publication date: March 22, 2018Inventors: Jeong Hwan SHIN, Sung Hoon BANG, Sang Jae YEO, Oh Jo KWON
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Patent number: 9129557Abstract: An organic light emitting diodes (OLED's) display has differently composed OLED's with respective different voltage-to-current characteristic curves. Variable power voltages are applied to the subpixels of these differently composed OLED's based on their respective voltage-to-current characteristic curves. In one embodiment, a display unit includes first subpixels emitting respective lights according to first image data representing a first color, second subpixels emitting respective lights according to second image data representing a second color, and third subpixels emitting respective lights according to third image data representing a third color, wherein the first, and second subpixels are powered by a first variable voltage power supply and the third subpixels are powered by a second and independently variable voltage power supply.Type: GrantFiled: October 1, 2013Date of Patent: September 8, 2015Assignee: Samsung Display Co., Ltd.Inventor: Sang-Jae Yeo
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Patent number: 9013390Abstract: A gate driver includes stages coupled to each other and outputting gate signals. Each stage includes a node driver, a pull-up unit, a node controller, a first node stabilizer, and a pull-down unit. The node driver outputs a first voltage or a second voltage to a first node in response to a first or a second input signal. The pull-up unit pulls an output terminal to high in response to a voltage of the first node. The node controller outputs an on-voltage to a second node in response to a first clock signal from a third node or a second clock signal from a fourth node. The first node stabilizer stabilizes the first node to an off-voltage in response to a voltage of the second node. The pull-down unit pulls the output terminal to low in response to the voltage of the second node or the second input signal.Type: GrantFiled: November 9, 2011Date of Patent: April 21, 2015Assignee: Samsung Display Co., Ltd.Inventors: Jin-Wook Yang, Sang-Jae Yeo
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Publication number: 20140354701Abstract: An organic light emitting diodes (OLED's) display has differently composed OLED's with respective different voltage-to-current characteristic curves. Variable power voltages are applied to the subpixels of these differently composed OLED's based on their respective voltage-to-current characteristic curves. In one embodiment, a display unit includes first subpixels emitting respective lights according to first image data representing a first color, second subpixels emitting respective lights according to second image data representing a second color, and third subpixels emitting respective lights according to third image data representing a third color, wherein the first, and second subpixels are powered by a first variable voltage power supply and the third subpixels are powered by a second and independently variable voltage power supply.Type: ApplicationFiled: October 1, 2013Publication date: December 4, 2014Applicant: Samsung Display Co., Ltd.Inventor: Sang-Jae YEO