Patents by Inventor Yu-Wen Chiou
Yu-Wen Chiou 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: 11521534Abstract: A display driving integrated circuit includes a common voltage buffer configured to provide a common voltage to a display panel and when a line outputting the common voltage and a gate line are short-circuited, apply a first current to the gate line or receive a second current from the gate line; a current generator configured to sum currents respectively corresponding to the first current and the second current and output an output current obtained by the summing; and a current detector configured to convert the output current into an output voltage and output a high or low signal based on a result of comparing the output voltage with a preset voltage.Type: GrantFiled: November 5, 2021Date of Patent: December 6, 2022Assignee: Samsung Electronics Co., Ltd.Inventors: Shih Chiao Huang, Jinwoo Kim, Tao-Jung Hung, Chulho Choi, Hajoon Shin, Myungho Seo, Yongjoo Song, Shih-Hsiung Kuo, Chui-Hsun Chiu, Jia Wei Chen, Chao Hsuan Liu, Yu-Wen Chiou
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Publication number: 20220262317Abstract: A display driving circuit including a reference voltage generator configured to generate a plurality of reference voltages, a buffer circuit configured to generate an output voltage based on a reference voltage, from among the reference voltages, applied to an input node thereof, and a precharging circuit configured to precharge the input node based on a first control signal in a transition period, which is a time period between a first point in time at which a first reference voltage is applied to the input node and a second point in time at which a second reference voltage is applied to the input node, may be provided.Type: ApplicationFiled: February 9, 2022Publication date: August 18, 2022Applicant: Samsung Electronics Co., Ltd.Inventors: Tao-Jung HUNG, Chao Hsuan LIU, Chulho CHOI, Hajoon SHIN, Chui-Hsun CHIU, Myungho SEO, Yu-Wen CHIOU
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Publication number: 20220223087Abstract: A display driving integrated circuit includes a common voltage buffer configured to provide a common voltage to a display panel and when a line outputting the common voltage and a gate line are short-circuited, apply a first current to the gate line or receive a second current from the gate line; a current generator configured to sum currents respectively corresponding to the first current and the second current and output an output current obtained by the summing; and a current detector configured to convert the output current into an output voltage and output a high or low signal based on a result of comparing the output voltage with a preset voltage.Type: ApplicationFiled: November 5, 2021Publication date: July 14, 2022Inventors: Shih Chiao HUANG, Jinwoo KIM, Tao-Jung HUNG, Chulho CHOI, Hajoon SHIN, Myungho SEO, Yongjoo SONG, Shih-Hsiung KUO, Chui-Hsun CHIU, Jia Wei CHEN, Chao Hsuan LIU, Yu-Wen CHIOU
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Publication number: 20150310812Abstract: A source driver includes an output unit and a pre-charge unit. The output unit includes a first output amplifier to output a first output voltage and a second output amplifier to output a second output voltage. A polarity of the second output voltage is opposite to a polarity of the first output voltage. The pre-charge unit pre-charges an input of the first output amplifier and an input of the second output amplifier during a first period, upon a polarity change of the output unit.Type: ApplicationFiled: December 15, 2014Publication date: October 29, 2015Inventors: Jia-wei CHEN, Yu-wen CHIOU, Yang-wook KIM
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Patent number: 8564586Abstract: A display driving circuit has a scan switch, an assistant unit, several storage switches, and several storage units. The scan switch couples to a data line. The assistant unit couples to the scan switch. The storage switches couple to the assistant unit. Each storage unit couples to the assistant unit by one of the storage switches. The assistant unit is shared by the storage units to compensate for several driving voltages or several driving currents of the storage units.Type: GrantFiled: February 23, 2011Date of Patent: October 22, 2013Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 8542167Abstract: A display apparatus has several light emitting elements and several lenses. The light emitting elements generate light of a first and second part of a frame respectively during a first and second period. The lenses pass through by the light from the light emitting elements, and operate to form images of the first and second part of the frame at a first and second location during the first and second period, respectively.Type: GrantFiled: August 1, 2007Date of Patent: September 24, 2013Assignee: Himax Technologies LimitedInventors: Yu-Wen Chiou, Biing-Seng Wu, Lin-Kai Bu
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Patent number: 8531360Abstract: A pixel circuit has an organic light emitting diode, a driving transistor, a capacitor and a first switch. The organic light emitting diode has a first end coupled to a first power source terminal. The driving transistor has a source and a drain respectively coupled to a second power source terminal and a second end of the light emitting diode. The capacitor couples a gate of the driving transistor to a reference voltage terminal. The first switch couples the second end of the light emitting diode to the capacitor, and couples the gate and the drain of the driving transistor together when a first scan signal is asserted.Type: GrantFiled: March 2, 2011Date of Patent: September 10, 2013Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 8441600Abstract: A display panel is disclosed. The display panel includes a data line, a scan line, a first switch connected to a first voltage, a second switch connected to a second voltage, and a pixel.Type: GrantFiled: June 17, 2011Date of Patent: May 14, 2013Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 8390638Abstract: One embodiment of the invention includes an image compensation module, an OLED display panel, and an OLED display apparatus. A target current value corresponding to a target gray level is stored in a compensation memory portion. A reference gray level and a reference current value corresponding to the reference gray level are stored in a reference memory portion. A compensation gray level can be obtained by an arithmetic compensation unit according to the target current value, reference gray level, reference current value, and gamma parameter. This may reduce the memory space needed for the compensation and reference memory portions, and compensate the images of the display apparatus and panel so that precise colors can be displayed with a high image quality.Type: GrantFiled: November 11, 2009Date of Patent: March 5, 2013Assignee: Innolux CorporationInventors: Yu-Wen Chiou, Ming Chun Tseng, Hong-Ru Guo, Chun-Yu Chen
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Patent number: 8384632Abstract: A pixel circuit has an organic light emitting diode, a driving transistor, a capacitor and a first switch. The organic light emitting diode has a first end coupled to a first power source terminal. The driving transistor has a source and a drain respectively coupled to a second power source terminal and a second end of the light emitting diode. The capacitor couples a gate of the driving transistor to a reference voltage terminal. The first switch couples the second end of the light emitting diode to the capacitor, and couples the gate and the drain of the driving transistor together when a first scan signal is asserted.Type: GrantFiled: March 2, 2011Date of Patent: February 26, 2013Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 8130180Abstract: A pixel circuit is disclosed in the present invention, which includes an OLED, a current-driving unit receiving a signal current on a data line during a programming period to provide a corresponding driving current to the OLED, a first switch coupled between the data line and the current-driving unit and turned on during the programming period to conduct the signal current, and a constant current unit providing a constant current on the data line during a pre-programming period and the programming period. The present invention also discloses an apparatus for driving a display, including a scan-driving circuit, a data-driving circuit, and plural constant current units. A method for driving a pixel having an OLED is also disclosed, which includes the steps of receiving a signal current on a data line during a programming period to provide a corresponding driving current to the OLED, and providing a constant current on the data line during a pre-programming period and the programming period.Type: GrantFiled: January 9, 2007Date of Patent: March 6, 2012Assignee: Himax Technologies LimitedInventors: Chen Yu Wang, Yu Wen Chiou
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Publication number: 20110242083Abstract: A display panel is disclosed. The display panel includes a data line, a scan line, a first switch connected to a first voltage, a second switch connected to a second voltage, and a pixel.Type: ApplicationFiled: June 17, 2011Publication date: October 6, 2011Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Yu-Wen Chiou
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Patent number: 7985978Abstract: A display panel is disclosed. The display panel includes a data line, a scan line, a first switch connected to a first voltage, a second switch connected to a second voltage, and a pixel.Type: GrantFiled: April 17, 2007Date of Patent: July 26, 2011Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Publication number: 20110175896Abstract: A display driving circuit has a scan switch, an assistant unit, several storage switches, and several storage units. The scan switch couples to a data line. The assistant unit couples to the scan switch. The storage switches couple to the assistant unit. Each storage unit couples to the assistant unit by one of the storage switches. The assistant unit is shared by the storage units to compensate for several driving voltages or several driving currents of the storage units.Type: ApplicationFiled: February 23, 2011Publication date: July 21, 2011Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Yu-Wen CHIOU
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Patent number: 7973748Abstract: A data driver for an OLED display has a resistor string, digital-to-analog converters and converting transistors. The resistor string provides a set of gamma voltages. Each of the digital-to-analog converters converts an input word into an output voltage selected from the gamma voltages. Each of the converting transistors conducts a driving current and having a gate-to-source voltage determined by the output voltage from one of the digital-to-analog converters. A method of data driving for an OLED display is also disclosed.Type: GrantFiled: October 3, 2007Date of Patent: July 5, 2011Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Publication number: 20110148829Abstract: A pixel circuit has an organic light emitting diode, a driving transistor, a capacitor and a first switch. The organic light emitting diode has a first end coupled to a first power source terminal. The driving transistor has a source and a drain respectively coupled to a second power source terminal and a second end of the light emitting diode. The capacitor couples a gate of the driving transistor to a reference voltage terminal. The first switch couples the second end of the light emitting diode to the capacitor, and couples the gate and the drain of the driving transistor together when a first scan signal is asserted.Type: ApplicationFiled: March 2, 2011Publication date: June 23, 2011Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Yu-Wen CHIOU
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Publication number: 20110148843Abstract: A pixel circuit has an organic light emitting diode, a driving transistor, a capacitor and a first switch. The organic light emitting diode has a first end coupled to a first power source terminal. The driving transistor has a source and a drain respectively coupled to a second power source terminal and a second end of the light emitting diode. The capacitor couples a gate of the driving transistor to a reference voltage terminal. The first switch couples the second end of the light emitting diode to the capacitor, and couples the gate and the drain of the driving transistor together when a first scan signal is asserted.Type: ApplicationFiled: March 2, 2011Publication date: June 23, 2011Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Yu-Wen CHIOU
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Patent number: 7920110Abstract: A pixel circuit has an organic light emitting diode, a driving transistor, a capacitor and a first switch. The organic light emitting diode has a first end coupled to a first power source terminal. The driving transistor has a source and a drain respectively coupled to a second power source terminal and a second end of the light emitting diode. The capacitor couples a gate of the driving transistor to a reference voltage terminal. The first switch couples the second end of the light emitting diode to the capacitor, and couples the gate and the drain of the driving transistor together when a first scan signal is asserted.Type: GrantFiled: March 28, 2007Date of Patent: April 5, 2011Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 7911459Abstract: A pixel circuit has a light emitting diode, a driving transistor, a capacitor, and a first switch. The light emitting diode had a first end to receive a first supply voltage. The driving transistor has a source and drain respectively receiving a second supply voltage and coupled to a second end of the light emitting diode. The capacitor has a first end coupled to a gate of the driving transistor and a second end receiving a reference voltage. The first switch is controlled by a first scan signal to couple the source of the driving transistor to the second end of the capacitor. The pixel circuit operates in a pre-charge period, a programming period, and an emission period sequentially, and the first scan signal is asserted to turn on the first switch during the pre-charge and emission periods.Type: GrantFiled: March 28, 2007Date of Patent: March 22, 2011Assignee: Himax Technologies LimitedInventor: Yu-Wen Chiou
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Patent number: 7903059Abstract: A lighting emitting display, a pixel circuit and a driving method thereof. The pixel circuit includes a driving transistor, a capacitor and a LED. The capacitor receives a first supply voltage and is coupled to a gate of the driving transistor. A cathode of the LED receives a second supply voltage. During a pre-charge period, the gate and the drain of the driving transistor are coupled to an anode of the LED, the source of the driving transistor is coupled to a charging voltage. The source of the driving transistor receives a data signal and the drain and gate of the driving transistor are coupled to each other during a programming period. The source of the driving transistor is coupled to receive the first supply voltage and the drain of the driving transistor is coupled to the anode of the LED during a display period.Type: GrantFiled: March 13, 2007Date of Patent: March 8, 2011Assignee: Himax Technologies LimitedInventors: Yu-Wen Chiou, Chin-Tien Chang, Hong-Ru Guo