Patents by Inventor Shi-Cheol Song
Shi-Cheol Song 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: 9977540Abstract: A touch display device and a light sensor module are discussed. The touch display device includes i light sensor modules, where i is a natural number greater than 1, for sensing a touch applied to a touch display panel, and a malfunction recovery unit for determining whether each of the i light sensor modules malfunctions and restarting at least one of the i light sensor modules when the at least one light sensor module is determined to malfunction.Type: GrantFiled: July 12, 2016Date of Patent: May 22, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Hyun-Woo Jang, Shi-Cheol Song
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Patent number: 9696883Abstract: A touch sensitive display device and a method for driving the same capable of increasing the touch recognition rate of the touch sensitive display device in the sleep mode are disclosed. The touch sensitive display device supports a normal mode and a sleep mode. The display device includes touch driving lines and a touch driver to supply one or more touch driving signals to the touch driving lines. The touch driver supplies the one or more touch driving signals at a first frequency during the normal mode of the touch sensitive display device, supplies the one or more touch driving signals at a second frequency during a first portion of the sleep mode of the touch sensitive display device, and supplies the one or more touch driving signals at a third frequency during a second portion of the sleep mode of the touch sensitive display device.Type: GrantFiled: May 22, 2015Date of Patent: July 4, 2017Assignee: LG Display Co., Ltd.Inventors: Jun Seok Oh, Shi Cheol Song, Sun Young Lee
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Patent number: 9658753Abstract: A touch sensitive display device and a method for driving the same capable of increasing the touch recognition rate of the touch sensitive display device in the sleep mode are disclosed. The touch sensitive display device supports a normal mode and a sleep mode. The display device includes touch driving lines and a touch driver to supply one or more touch driving signals to the touch driving lines. The touch driver supplies the one or more touch driving signals at a first frequency during the normal mode of the touch sensitive display device, supplies the one or more touch driving signals at a second frequency during a first portion of the sleep mode of the touch sensitive display device, and supplies the one or more touch driving signals at a third frequency during a second portion of the sleep mode of the touch sensitive display device.Type: GrantFiled: May 22, 2015Date of Patent: May 23, 2017Assignee: LG Display Co., Ltd.Inventors: Jun Seok Oh, Shi Cheol Song, Sun Young Lee
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Patent number: 9645639Abstract: Disclosed herein is an apparatus and method for driving a touch sensor, which is capable of improving touch sensitivity and accuracy. The touch sensor driving apparatus includes a touch sensor; a read-out circuit; and a signal processor configured to compare raw data from the read-out circuit with a predetermined primary reference value and secondary reference value so as to determine whether the touch node has been touched, wherein the signal processor collects the raw data of each touch node or each channel during a plurality of frames and resets and updates the secondary reference value of each touch node or each channel using the collected raw data.Type: GrantFiled: November 13, 2012Date of Patent: May 9, 2017Assignee: LG Display Co., Ltd.Inventors: Hyun-Woo Jang, Shi-Cheol Song, Eun-Jung Kim
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Patent number: 9495030Abstract: Discussed is an LCD device including a touch screen which reduces the influence of noise applied to the touch screen by driving of a liquid crystal panel and thus leads to enhancement of the touch sensing performance. The LCD device includes a liquid crystal panel, a plurality of first touch electrodes, an insulation unit, a tempered glass, and a plurality of second touch electrodes. The liquid crystal panel includes a lower substrate and an upper substrate. The first touch electrodes are formed on the upper substrate for detecting a touch point in a first direction. The insulation unit is formed on the first touch electrodes. The tempered glass is formed on the insulation unit. The second touch electrodes are formed at a lower surface of the tempered glass for detecting a touch point in a second direction.Type: GrantFiled: December 6, 2011Date of Patent: November 15, 2016Assignee: LG DISPLAY CO., LTD.Inventors: Jae Hun Shin, Byung Koo Kang, Moon Bong Song, Shi Cheol Song
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Publication number: 20160320917Abstract: A touch display device and a light sensor module are discussed. The touch display device includes i light sensor modules, where i is a natural number greater than 1, for sensing a touch applied to a touch display panel, and a malfunction recovery unit for determining whether each of the i light sensor modules malfunctions and restarting at least one of the i light sensor modules when the at least one light sensor module is determined to malfunction.Type: ApplicationFiled: July 12, 2016Publication date: November 3, 2016Applicant: LG Display Co., Ltd.Inventors: Hyun-Woo JANG, Shi-Cheol SONG
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Patent number: 9417736Abstract: A touch display device and a light sensor module recovery method thereof are discussed. The touch display device includes i light sensor modules, where i is a natural number greater than 1, for sensing a touch applied to a touch display panel, and a malfunction recovery unit for determining whether each of the i light sensor modules malfunctions and restarting at least one of the i light sensor modules when the at least one light sensor module is determined to malfunction.Type: GrantFiled: October 30, 2013Date of Patent: August 16, 2016Assignee: LG Display Co., Ltd.Inventors: Hyun-Woo Jang, Shi-Cheol Song
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Publication number: 20160188142Abstract: A touch sensitive display device and a method for driving the same capable of increasing the touch recognition rate of the touch sensitive display device in the sleep mode are disclosed. The touch sensitive display device supports a normal mode and a sleep mode. The display device includes touch driving lines and a touch driver to supply one or more touch driving signals to the touch driving lines. The touch driver supplies the one or more touch driving signals at a first frequency during the normal mode of the touch sensitive display device, supplies the one or more touch driving signals at a second frequency during a first portion of the sleep mode of the touch sensitive display device, and supplies the one or more touch driving signals at a third frequency during a second portion of the sleep mode of the touch sensitive display device.Type: ApplicationFiled: May 22, 2015Publication date: June 30, 2016Inventors: Jun Seok Oh, Shi Cheol Song, Sun Young Lee
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Patent number: 9176559Abstract: A display device using infrared sensor modules that is capable of reducing power consumption and extending durability of infrared light sources and sensors and a method of driving the same are disclosed. The display device includes a display panel to display images, a plurality of infrared sensor modules to optically detect a touched position on the display panel, an infrared sensor module controller to sequentially drive the infrared sensor modules and to switch the infrared sensor modules to a low-power mode when a touch operation has not been performed within a predetermined period of time or when the display panel is in a power-saving mode, and a system to provide a state of the display panel to the infrared sensor module controller.Type: GrantFiled: October 14, 2011Date of Patent: November 3, 2015Assignee: LG Display Co., Ltd.Inventors: Jun-Seok Oh, Shi-Cheol Song
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Patent number: 8803846Abstract: An optical touch sensing method includes sensing light corresponding to a touch region, comparing a first amount of the light sensed corresponding to the touch region with a first lower threshold, determining that a touch is made if the first amount is less than or equal to the first lower threshold, comparing the first amount of the light sensed corresponding to the touch region with an upper threshold, and determining that a touch is made if the first amount is greater than or equal to the upper threshold.Type: GrantFiled: December 15, 2010Date of Patent: August 12, 2014Assignee: LG Display Co., Ltd.Inventor: Shi-Cheol Song
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Publication number: 20140118305Abstract: A touch display device and a light sensor module recovery method thereof are discussed. The touch display device includes i light sensor modules, where i is a natural number greater than 1, for sensing a touch applied to a touch display panel, and a malfunction recovery unit for determining whether each of the i light sensor modules malfunctions and restarting at least one of the i light sensor modules when the at least one light sensor module is determined to malfunction.Type: ApplicationFiled: October 30, 2013Publication date: May 1, 2014Applicant: LG DISPLAY CO., LTD.Inventors: Hyun-Woo JANG, Shi-Cheol SONG
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Patent number: 8564572Abstract: The present invention relates to a method for auto angle setting of an infrared sensor module having a light emitting unit and a sensor unit arranged at least two corners of a display panel, includes the steps of selecting a peak detection mode or a slope detection mode; in the peak detection mode, setting a pixel of in the sensor unit which senses a light quantity as a reference point corresponding to a corner other infrared sensor module is arranged at; in the slope detection mode, analyzing the light quantities of a start pixel block and an end pixel block in the sensor unit and setting a pixel which forms a greatest slope as a start point or an end point; and setting an effective angle of view in the sensor unit with reference to the reference point, the start point, and the end point.Type: GrantFiled: October 28, 2011Date of Patent: October 22, 2013Assignee: LG Display Co., Ltd.Inventors: Jae-Hyun Park, Byung-Chun Yu, Shi-Cheol Song, Suk-Won Choi
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Publication number: 20120218198Abstract: Discussed is an LCD device including a touch screen which reduces the influence of noise applied to the touch screen by driving of a liquid crystal panel and thus leads to enhancement of the touch sensing performance. The LCD device includes a liquid crystal panel, a plurality of first touch electrodes, an insulation unit, a tempered glass, and a plurality of second touch electrodes. The liquid crystal panel includes a lower substrate and an upper substrate. The first touch electrodes are formed on the upper substrate for detecting a touch point in a first direction. The insulation unit is formed on the first touch electrodes. The tempered glass is formed on the insulation unit. The second touch electrodes are formed at a lower surface of the tempered glass for detecting a touch point in a second direction.Type: ApplicationFiled: December 6, 2011Publication date: August 30, 2012Inventors: Jae Hun SHIN, Byung Koo Kang, Moon Bong Song, Shi Cheol Song
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Publication number: 20120105376Abstract: The present invention relates to a method for auto angle setting of an infrared sensor module having a light emitting unit and a sensor unit arranged at least two corners of a display panel, includes the steps of selecting a peak detection mode or a slope detection mode; in the peak detection mode, setting a pixel of in the sensor unit which senses a light quantity as a reference point corresponding to a corner other infrared sensor module is arranged at; in the slope detection mode, analyzing the light quantities of a start pixel block and an end pixel block in the sensor unit and setting a pixel which forms a greatest slope as a start point or an end point; and setting an effective angle of view in the sensor unit with reference to the reference point, the start point, and the end point.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Inventors: Jae-Hyun PARK, Byung-Chun Yu, Shi-Cheol Song, Suk-Won Choi
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Publication number: 20120098797Abstract: A display device using infrared sensor modules that is capable of reducing power consumption and extending durability of infrared light sources and sensors and a method of driving the same are disclosed. The display device includes a display panel to display images, a plurality of infrared sensor modules to optically detect a touched position on the display panel, an infrared sensor module controller to sequentially drive the infrared sensor modules and to switch the infrared sensor modules to a low-power mode when a touch operation has not been performed within a predetermined period of time or when the display panel is in a power-saving mode, and a system to provide a state of the display panel to the infrared sensor module controller.Type: ApplicationFiled: October 14, 2011Publication date: April 26, 2012Inventors: Jun-Seok Oh, Shi-Cheol Song
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Publication number: 20110148820Abstract: An optical touch sensing method includes sensing light corresponding to a touch region, comparing a first amount of the light sensed corresponding to the touch region with a first lower threshold, determining that a touch is made if the first amount is less than or equal to the first lower threshold, comparing the first amount of the light sensed corresponding to the touch region with an upper threshold, and determining that a touch is made if the first amount is greater than or equal to the upper threshold.Type: ApplicationFiled: December 15, 2010Publication date: June 23, 2011Inventor: Shi-Cheol Song