Patents by Inventor Geun-Yeong Chang
Geun-Yeong Chang 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: 20240098894Abstract: A display device includes a substrate including a display area including pixels and a non-display area around the display area and including a pad area, and a circuit board attached to the pad area. Pad electrodes arranged along a first direction and a first alignment mark located at a side of the pad electrodes in the first direction and protruding more than the pad electrodes are disposed on the substrate in the pad area. The circuit board includes a base portion, and lead electrodes disposed on the base portion and respectively facing the pad electrodes. A first alignment mark hole is defined through the base portion at a side of the lead electrodes in the first direction, the first alignment mark and the first alignment mark hole have a same shape as each other, and the first alignment mark is accommodated in the first alignment mark hole.Type: ApplicationFiled: May 10, 2023Publication date: March 21, 2024Inventors: Hyung Jin KIM, Hyang Won MOON, Hyeok Tae KWON, Si Hyung AN, Geun Yeong CHANG
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Patent number: 11409401Abstract: A touch sensor and a display device including the same, in which the touch sensor includes a base layer including a first sensing area and a second sensing area, a sensing driving electrode extending along a first direction in the first sensing area and the second sensing area, a first sub-sensing electrode disposed in the first sensing area and extending along a second direction intersecting the first direction, a second sub-sensing electrode disposed in the second sensing area and extending along the second direction, a first common electrode disposed in the first sensing area, and a second common electrode disposed in the second sensing area. The first sub-sensing electrode and the second sub-sensing electrode are electrically connected to each other.Type: GrantFiled: March 10, 2021Date of Patent: August 9, 2022Assignee: Samsung Display Co., Ltd.Inventors: Chang Ho Hyun, Geun Yeong Chang, Man Bok Cheon
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Publication number: 20220004281Abstract: A touch sensor and a display device including the same, in which the touch sensor includes a base layer including a first sensing area and a second sensing area, a sensing driving electrode extending along a first direction in the first sensing area and the second sensing area, a first sub-sensing electrode disposed in the first sensing area and extending along a second direction intersecting the first direction, a second sub-sensing electrode disposed in the second sensing area and extending along the second direction, a first common electrode disposed in the first sensing area, and a second common electrode disposed in the second sensing area. The first sub-sensing electrode and the second sub-sensing electrode are electrically connected to each other.Type: ApplicationFiled: March 10, 2021Publication date: January 6, 2022Inventors: Chang Ho HYUN, Geun Yeong CHANG, Man Bok CHEON
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Patent number: 10706787Abstract: A display device including a display panel including a plurality of pixels connected to a plurality of data lines and a plurality of gate lines crossing the plurality of data lines; a data driver comprising a plurality of terminals in contact with a plurality of pads on the display panel through a conductive adhesive member and configured to detect a resistance value of the plurality of terminals; and a timing controller configured to transfer the resistance value to an external controller.Type: GrantFiled: April 25, 2019Date of Patent: July 7, 2020Assignee: Samsung Display Co., Ltd.Inventors: Chang Ho Hyun, Geun Yeong Chang
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Publication number: 20200020281Abstract: A display device including a display panel including a plurality of pixels connected to a plurality of data lines and a plurality of gate lines crossing the plurality of data lines; a data driver comprising a plurality of terminals in contact with a plurality of pads on the display panel through a conductive adhesive member and configured to detect a resistance value of the plurality of terminals; and a timing controller configured to transfer the resistance value to an external controller.Type: ApplicationFiled: April 25, 2019Publication date: January 16, 2020Inventors: Chang Ho HYUN, Geun Yeong Chang
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Patent number: 7528806Abstract: A plasma display panel and a method for driving the same, wherein the method comprises detecting the frequency of a vertical synchronous signal, comparing the detected frequency with a reference frequency, and controlling the number of sustain pulses of each sub-field of a video signal according to a result of the comparison. According to the invention, damage to a plasma display panel driving circuit due to the input of an abnormal vertical synchronous signal may be prevented.Type: GrantFiled: September 29, 2004Date of Patent: May 5, 2009Assignee: Samsung SDI Co., Ltd.Inventors: Geun-Yeong Chang, Tae-Kyoung Kang
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Patent number: 7486258Abstract: A method of driving a plasma display panel (PDP) is provided. In the method, the number of sustain pulses to be applied during a sustain period for each subfield in a frame is calculated. In order to achieve better image quality, fractional parts of the number of calculated sustain pulses is not disregarded but used by adding this fractional part to the appropriate count for a comparable subfield in a subsequent frame. By including this calculated fractional part in the calculations, a better image quality can be realized where there is less distortion.Type: GrantFiled: November 12, 2004Date of Patent: February 3, 2009Assignee: Samsung SDI Co., Ltd.Inventors: Joon-Suk Baik, Geun-Yeong Chang
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Patent number: 7342595Abstract: A method and apparatus for driving a plasma display panel that automatically controls power using an average signal level that is compensated based on a difference between power consumption at red (R), green (G), and blue (B) discharge cells. The method includes calculating R, G, and B average signal levels, calculating a compensated average signal level using the R, G, and B average signal levels and R, G, and B weights, and controlling the number of discharges for each frame, which is in inversely proportional to the compensated average signal level. The R, G, and B weights are set at a value that reduces a difference between power consumption at the R, G, and B colored discharge cells when displaying the R, G, and B colors in a case where the R, G, and B average signal levels are equal to each other.Type: GrantFiled: November 19, 2004Date of Patent: March 11, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Geun-Yeong Chang, Woo-Jin Kim
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Publication number: 20060012547Abstract: A plasma display device and image processing method thereof. A scan method of one-frame video signal data is determined in advance. Data to be compared are selected from among the video signal data according to the determination. It is determined as to whether the one-frame video signal data have high address power consumption by using the data. Address data are re-established when video signal data are found to have high address power consumption.Type: ApplicationFiled: May 18, 2005Publication date: January 19, 2006Inventor: Geun-Yeong Chang
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Publication number: 20050140593Abstract: A method and apparatus for driving a plasma display panel that automatically controls power using an average signal level that is compensated based on a difference between power consumption at red (R), green (G), and blue (B) discharge cells. The method includes calculating R, G, and B average signal levels, calculating a compensated average signal level using the R, G, and B average signal levels and R, G, and B weights, and controlling the number of discharges for each frame, which is in inversely proportional to the compensated average signal level. The R, G, and B weights are set at a value that reduces a difference between power consumption at the R, G, and B colored discharge cells when displaying the R, G, and B colors in a case where the R, G, and B average signal levels are equal to each other.Type: ApplicationFiled: November 19, 2004Publication date: June 30, 2005Inventors: Geun-Yeong Chang, Woo-Jin Kim
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Publication number: 20050140580Abstract: A method of driving a plasma display panel (PDP) is provided. In the method, the number of sustain pulses to be applied during a sustain period for each subfield in a frame is calculated. In order to achieve better image quality, fractional parts of the number of calculated sustain pulses is not disregarded but used by adding this fractional part to the appropriate count for a comparable subfield in a subsequent frame. By including this calculated fractional part in the calculations, a better image quality can be realized where there is less distortion.Type: ApplicationFiled: November 12, 2004Publication date: June 30, 2005Inventors: Joon-Suk Baik, Geun-Yeong Chang
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Publication number: 20050110711Abstract: A plasma display panel driving method including processing a video signal to generate a frame, dividing the frame into a plurality of subfields having allocated grayscale weights, and applying a number of sustain pulses for each subfield to the sustain electrode pairs during a sustain period in each subfield. The number of sustain pulses for each subfield is determined such that a brightness produced by applying the number of sustain pulses is linearly proportional to the subfield's allocated grayscale weight.Type: ApplicationFiled: November 19, 2004Publication date: May 26, 2005Inventor: Geun-Yeong Chang
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Publication number: 20050073478Abstract: A plasma display panel and a method for driving the same, wherein the method comprises detecting the frequency of a vertical synchronous signal, comparing the detected frequency with a reference frequency, and controlling the number of sustain pulses of each sub-field of a video signal according to a result of the comparison. According to the invention, damage to a plasma display panel driving circuit due to the input of an abnormal vertical synchronous signal may be prevented.Type: ApplicationFiled: September 29, 2004Publication date: April 7, 2005Inventors: Geun-Yeong Chang, Tae-Kyoung Kang
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Publication number: 20030063049Abstract: A plasma display panel (PDP) power consumption controlling method by varying a number of sustain pulses according to a load ratio (L/R) includes setting a safety operating area (SOA) on the number of sustain pulses according to the L/R, and controlling the power consumption within the SOA. The entire range of the number of sustain pulses has an upper and a lower boundary value, and a number of sustain pulses corresponding to the respective L/R sections is established. When the L/R is the previous number of sustain discharging pulses and it digresses from the SOA, the number of sustain discharging pulses is converged to the upper boundary value when the L/R has increased, and is converged to the lower boundary value when the L/R has decreased.Type: ApplicationFiled: September 19, 2002Publication date: April 3, 2003Inventors: Yoon-Phil Eo, Nam-Sung Jung, Geun-Yeong Chang, Cheol-Hong Kim, Se-Woong Kim