Patents by Inventor Changju Lee
Changju 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: 20240141578Abstract: A washing machine including a tub; a water supply valve configured to open or close a flow path to supply water to the tub; and a controller configured to (a) control the water supply valve to supply water to the tub to a target water level, (b) determine whether water pressure of the water supply valve is normal based on supplying the water to the tub to the target water level, (c) based on determining that the water pressure of the water supply valve is abnormal, update water pressure information that includes water pressure and water supply operation time of the water supply valve by adjusting the water supply operation time, and (d) set the updated water pressure information to be used for controlling the water supply valve in an operation course of the washing machine.Type: ApplicationFiled: September 13, 2023Publication date: May 2, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sukwoo PARK, Minjoo KIM, Changju OH, Sangyeol LEE, Jaepoong LEE
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Publication number: 20240038157Abstract: A display system includes a host configured to transfer image data respectively corresponding to a plurality of frames through a main channel, and to transfer a synchronization signal that synchronizes a clock signal of the host with a clock signal of the display driving circuit through an auxiliary channel, a display panel configured to display the image data, and a display driving circuit configured to generate control signals driving the display panel, based on the synchronization signal received through the auxiliary channel. The host is configured to transfer the synchronization signal including a first synchronization signal and a second synchronization signal that is different from the first synchronization signal, to the display driving circuit, through the auxiliary channel.Type: ApplicationFiled: July 12, 2023Publication date: February 1, 2024Applicant: Samsung Electronics Co., Ltd.Inventors: Changju LEE, Kyounghwan KWON, Junho HUH
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Publication number: 20240029624Abstract: A display driving circuit for receiving image data from a host and driving a display panel, the display driving circuit including: an interface configured to receive the image data from the host; and a timing controller configured to control a first interrupt signal for waking up the host in a low-power mode and to control a second interrupt signal based on a light emission control signal, wherein the light emission control signal is for controlling a light emission time of a pixel included in the display panel, and wherein the timing controller is further configured to control a level of the second interrupt signal based on whether the image data has started to be received from the host in response to the first interrupt signal and the second interrupt signal.Type: ApplicationFiled: June 14, 2023Publication date: January 25, 2024Inventors: Changju LEE, Sooyong KIM, Taesung KIM, Junho HUH
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Patent number: 11817050Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.Type: GrantFiled: December 14, 2022Date of Patent: November 14, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
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Publication number: 20230206830Abstract: A stacked display driver integrated circuit (DDIC) configured to drive a display panel of a display device includes a first circuit and a second circuit. The first circuit is formed by a low-end process according to a first design rule such that the first circuit has a first critical dimension. The second circuit is formed by a high-end process according to a second design rule smaller than the first design rule such that the second circuit has a second critical dimension smaller than the first critical dimension. The first circuit and the second circuit are stacked in a vertical direction. The size of the stacked DDIC may be reduced by stacking, in the vertical direction, the first circuit including analog circuits and the second circuit including digital circuits.Type: ApplicationFiled: November 14, 2022Publication date: June 29, 2023Inventors: Changju LEE, Kyoungmin LEE
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Publication number: 20230110768Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.Type: ApplicationFiled: December 14, 2022Publication date: April 13, 2023Applicant: Samsung Electronics Co., Ltd.Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
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Patent number: 11615752Abstract: A backlight device includes LED elements divided into dimming groups; a panel driver configured to output a reference current for driving the LED elements; and pixel circuits, each of which is connected to the panel driver through a common line and is respectively configured to drive first LED elements comprised in a corresponding dimming group. Each of the pixel circuits is configured to: in a first period of a frame period, obtain a reference voltage based on the reference current and store the reference voltage, in a second period of the frame period, obtain luminance data of an image displayed by the corresponding dimming group, and in a third period of the frame period, drive the first LED elements during a light emitting time corresponding to the luminance data obtained in the second period using the reference voltage stored in the first period.Type: GrantFiled: April 29, 2021Date of Patent: March 28, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Changju Lee, Yongil Kwon, Yoon-Kyung Choi, Junho Huh
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Publication number: 20230050409Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.Type: ApplicationFiled: October 31, 2022Publication date: February 16, 2023Applicant: Samsung Electronics Co., Ltd.Inventor: Changju LEE
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Patent number: 11532269Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.Type: GrantFiled: July 21, 2021Date of Patent: December 20, 2022Assignee: Samsung Electronics Co., Ltd.Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
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Publication number: 20220376259Abstract: An electrode for a secondary battery is disclosed herein. In some embodiments, an electrode for a secondary battery includes an electrode current collector; and an active material layer disposed on the electrode current collector, wherein the active material layer is prepared by coating an electrode slurry onto the electrode current collector, wherein the electrode slurry is an aqueous solution containing an anode active material, a conductive material, a surfactant and a binder is coated onto the electrode current collector, and wherein the binder comprises a water-soluble polymer.Type: ApplicationFiled: August 27, 2021Publication date: November 24, 2022Applicant: LG Energy Solution, Ltd.Inventors: Suk In Noh, Sangwook Woo, Changju Lee
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Patent number: 11487386Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.Type: GrantFiled: May 12, 2021Date of Patent: November 1, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Changju Lee
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Patent number: 11442572Abstract: A touch display controller, panel and system may include a select circuit having a first selectable input terminal connected to touch sensors, a second selectable input terminal connected to display pixels, and an output terminal; an analog front-end circuit coupled to the output terminal of the select circuit to receive a raw analog signal, and having a shared processing path for analog signals from both the touch sensors and the display pixels; and a control circuit configured to control the an analog front-end circuit based on which type of element among the touch sensors or the display pixels is connected to the analog front-end circuit.Type: GrantFiled: July 24, 2020Date of Patent: September 13, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jinbong Kim, Changju Lee, Yoonkyung Choi
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Patent number: 11422653Abstract: The present disclosure provides a touch and display control device with a touch screen controller and a display driver. The touch screen controller receives a touch sensing signal, generates touch raw data based on the touch sensing signal, and extracts touch information based on the touch raw data. The display driver receives an original image from a host processor, directly receives the touch information from the touch screen controller, generates touch trajectory information by accumulating the touch information, internally generates a touch image to be displayed with the original image based on the touch trajectory information, generates a composite image by synthesizing the original image and the touch image, and controls a display panel to display the composite image. The display driver includes a memory storing the touch trajectory information.Type: GrantFiled: March 2, 2021Date of Patent: August 23, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Changju Lee
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Patent number: 11403983Abstract: A display chipset structure that is based on an integrated display controller is provided. The display controller includes including a display processor comprising a first digital circuit, and configured to receive image data from an application processor (AP) and output the image data to a first component driver chip configured to drive a gate line and a source line of a display panel; and a touch processor comprising a second digital circuit, and configured to receive touch data from a second component driver chip configured to drive sensing electrodes of a touch panel. The display controller is implemented as one semiconductor chip and separated from each of the first and second component driver chips, and the display processor and the touch processor communicate with each other through an internal interconnection of the one semiconductor chip.Type: GrantFiled: August 18, 2020Date of Patent: August 2, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Changju Lee, Yoonkyung Choi, Jinbong Kim, Junho Huh
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Publication number: 20220114957Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.Type: ApplicationFiled: July 21, 2021Publication date: April 14, 2022Applicant: Samsung Electronics Co., Ltd.Inventors: Changju LEE, Yonjun SHIN, Hoonmo YANG, Sungchul YOON, Junghak LEE
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Publication number: 20210397327Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.Type: ApplicationFiled: May 12, 2021Publication date: December 23, 2021Applicant: Samsung Electronics Co., Ltd.Inventor: Changju LEE
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Publication number: 20210350754Abstract: A backlight device includes LED elements divided into dimming groups; a panel driver configured to output a reference current for driving the LED elements; and pixel circuits, each of which is connected to the panel driver through a common line and is respectively configured to drive first LED elements comprised in a corresponding dimming group. Each of the pixel circuits is configured to: in a first period of a frame period, obtain a reference voltage based on the reference current and store the reference voltage, in a second period of the frame period, obtain luminance data of an image displayed by the corresponding dimming group, and in a third period of the frame period, drive the first LED elements during a light emitting time corresponding to the luminance data obtained in the second period using the reference voltage stored in the first period.Type: ApplicationFiled: April 29, 2021Publication date: November 11, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Changju Lee, Yongil Kwon, Yoon-Kyung Choi, Junho Huh
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Publication number: 20210349562Abstract: The present disclosure provides a touch and display control device with a touch screen controller and a display driver. The touch screen controller receives a touch sensing signal, generates touch raw data based on the touch sensing signal, and extracts touch information based on the touch raw data. The display driver receives an original image from a host processor, directly receives the touch information from the touch screen controller, generates touch trajectory information by accumulating the touch information, internally generates a touch image to be displayed with the original image based on the touch trajectory information, generates a composite image by synthesizing the original image and the touch image, and controls a display panel to display the composite image. The display driver includes a memory storing the touch trajectory information.Type: ApplicationFiled: March 2, 2021Publication date: November 11, 2021Inventor: Changju Lee
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Publication number: 20210117035Abstract: A touch display controller, panel and system may include a select circuit having a first selectable input terminal connected to touch sensors, a second selectable input terminal connected to display pixels, and an output terminal; and an analog front-end circuit coupled to the output terminal of the select circuit to receive a raw analog signal, and having a shared processing path for analog signals from both the touch sensors and the display pixels.Type: ApplicationFiled: July 24, 2020Publication date: April 22, 2021Inventors: JINBONG KIM, Changju Lee, Yoonkyung Choi
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Publication number: 20210065602Abstract: A display chipset structure that is based on an integrated display controller is provided. The display controller includes including a display processor comprising a first digital circuit, and configured to receive image data from an application processor (AP) and output the image data to a first component driver chip configured to drive a gate line and a source line of a display panel; and a touch processor comprising a second digital circuit, and configured to receive touch data from a second component driver chip configured to drive sensing electrodes of a touch panel. The display controller is implemented as one semiconductor chip and separated from each of the first and second component driver chips, and the display processor and the touch processor communicate with each other through an internal interconnection of the one semiconductor chip.Type: ApplicationFiled: August 18, 2020Publication date: March 4, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Changju LEE, Yoonkyung Choi, Jinbong Kim, Junho Huh