Patents by Inventor Tung-Hsin Lan
Tung-Hsin Lan 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: 8766951Abstract: An optical touch module and an optical touch display panel are provided. The optical touch module includes a first photo sensor, a second photo sensor, and a signal processing unit. The first photo sensor is disposed in one of the plurality of pixels of a pixel array. A first terminal and a control terminal of the first photo sensor are coupled to a first scan line. The second photo sensor has a first terminal coupled to a second terminal of the first photo sensor and outputting a sensing voltage, a control terminal coupled to the first terminal of the second photo sensor, and a second terminal receiving a first voltage. The signal processing unit is coupled to the first terminal of the second photo sensor, so as to convert the sensing voltage to a touch signal.Type: GrantFiled: October 8, 2010Date of Patent: July 1, 2014Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Tung-Hsin Lan, Mu-Shan Liao, Tien-Yung Huang, Feng-Shu Chang
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Patent number: 8704815Abstract: A display device including a first voltage generator, a second voltage generator, a timing controller, a level shifter and a display panel is provided. The first voltage generator is configured to generate a gate high voltage. During a first period, the gate high voltage is a first voltage. After the first period, the gate high voltage is a second voltage. The first voltage is higher than the second voltage. The second voltage generator is configured to generate a gate low voltage. According to the gate high voltage and the gate low voltage, the level shifter shifts the voltage levels of the start signal, the clock signal and the inverse signal produced by the timing controller for driving a plurality of shift registers disposed on a substrate of the display panel. The shift registers is configured to output scanning signals in sequence.Type: GrantFiled: June 13, 2011Date of Patent: April 22, 2014Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hung-Chun Li, Chun-Chieh Wang, Tung-Hsin Lan
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Patent number: 8344979Abstract: A method and an apparatus for over-driving a liquid crystal display (LCD) are provided, which are suitable for compensating a gray level brightness of the LCD. The method includes the following steps. Firstly, a data buffer unit outputs a current frame data. Then, the current frame data is stored into a frame memory unit, and the frame memory unit outputs a previous frame data. Next, several look-up tables (LUTs) are searched for a driving voltage in a corresponding LUT according to the current frame data and the previous frame data. Afterward, a position scanning unit receives the current frame data to determine a current position. Finally, a multiplexer outputs the corresponding driving voltage at the current position. Thus, a display panel has the same gray level brightness in upper, middle, and lower portions thereof, thereby avoiding ghosting.Type: GrantFiled: December 15, 2009Date of Patent: January 1, 2013Assignee: Chunghwa Picture Tubes., Ltd.Inventors: Mu-Shan Liao, Tung-Hsin Lan, Hung-Chun Li
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Patent number: 8339346Abstract: A display panel driving voltage supply apparatus and method is disclosed. Said supply apparatus comprises: a timing controller for providing a voltage control signal and a switch control signal; a level shifter, receiving the voltage control signal for selecting a first specified voltage to be transmitted on a first driving voltage supply line as well as selecting a second specified voltage to be transmitted on a second driving voltage supply line according to the voltage control signal; and a first switch, wherein the first and the second driving voltage supply lines are electrically connected with each other to charge share between the first and the second specified voltages when the first switch is turned on under the control of the switch control signal. Said supply apparatus is capable of solving the problem of high power consumption and thereby reducing the electricity consumption.Type: GrantFiled: November 23, 2010Date of Patent: December 25, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hung-chun Li, Mu-shan Liao, Tung-hsin Lan
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Publication number: 20120229441Abstract: A liquid crystal display (LCD) panel includes a plurality of scan lines, a plurality of data lines, a plurality of common electrode lines, a plurality of pixel units, and at least one voltage regulating chip. The pixel units are coupled to the corresponding scan lines, the corresponding data lines, and the corresponding common electrode lines, respectively. The voltage regulating chip is coupled to a regulated voltage and the common electrode lines, so as to provide a regulated current to each of the common electrode lines based on the regulated voltage, respectively.Type: ApplicationFiled: June 20, 2011Publication date: September 13, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Chun-Chieh Wang, Tung-Hsin Lan, Yu-Ting Lin, Chia-Hua Chang
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Patent number: 8243219Abstract: Each pixel of an LCD display includes a main pixel, a sub-pixel, a resistor, and a third switch. The third switch is used for controlling the charging time of the main pixel and the sub-pixel. A data signal of a main pixel of a previous pixel is utilized to pre-charge the main pixel and the sub-pixel, and then data is transmitted to the sub-pixel and the main pixel. When data transmission to the sub-pixel is ended, the data transmission path to the sub-pixel is switched off, and the data keeps being transmitted only to the main pixel. The LCD panel utilizing this method only needs to add one gate line at each of the top and bottom of the panel to realize the AMVA structure of 8-domain for the LCD panel.Type: GrantFiled: August 18, 2009Date of Patent: August 14, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Tung-Hsin Lan, Mu-Shan Liao, Tien-Yung Huang, Chia-Chun Fang
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Publication number: 20120194566Abstract: A compensation circuit for a liquid crystal panel includes a plurality of source scan lines, a plurality of gate scan lines, a plurality of inverse gate scan lines, a plurality of pixel units, and a plurality of compensation units. Each source scan line is used for outputting a data voltage, each gate scan line is used for outputting a control signal, and each inverse gate scan line is used for outputting an inverse control signal. A pixel unit of the plurality of pixel units is charged/discharged to a voltage corresponding to a gray level according to a corresponding control signal and a corresponding data voltage, and a corresponding compensation unit provides a compensation voltage to compensate the voltage corresponding to the gray level according to an inverse control signal.Type: ApplicationFiled: March 22, 2011Publication date: August 2, 2012Inventors: Tung-Hsin Lan, Shin-Yuan Peng, Shin-Hen Chao, Chi-Hu Lin
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Patent number: 8217886Abstract: An LCD device includes a plurality of first data lines, a plurality of second data lines, a plurality of display units, a source driver and a gate driver. Each of the second data lines is disposed between two corresponding first data lines, while each display unit is coupled to a corresponding first data line and a corresponding gate line or to a corresponding second data line and a corresponding gate line. The source driver is coupled to the plurality of first data lines and the plurality of second data lines for providing a plurality of data signals. Each of the data signals is outputted to a corresponding first data line during a first period in a write period, and outputted to a corresponding second data line during a second period in the write period.Type: GrantFiled: March 29, 2009Date of Patent: July 10, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Tung-Hsin Lan, Mu-Shan Liao, Tien-Yung Huang, Chia-Chun Fang
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Patent number: 8217969Abstract: A display device and a display controlling module are provided. The display controlling module includes a data analyzing unit, an interference data storage unit and a data adjustment unit. The data analyzing unit receives a plurality of display data of a corresponding frame, analyzes the display data to obtain a plurality of grayscale distributions of the corresponding display regions of a display panel and generates a backlight signal for adjusting a brightness of each of a plurality of light emitting groups of a backlight module according to the grayscale distributions. The interference data storage unit outputs a plurality of interferences of the corresponding display data according to the backlight controlling signal. The data adjustment unit receives the display data and the interferences and correspondingly adjusts grayscales of the display data according to the interferences.Type: GrantFiled: November 16, 2010Date of Patent: July 10, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan
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Patent number: 8217584Abstract: A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.Type: GrantFiled: September 13, 2010Date of Patent: July 10, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chien-Yang Chen, Po-Kun Hsieh, Tung-Hsin Lan, Ming-Chang Lin
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Patent number: 8217873Abstract: A liquid crystal display device for improving color washout problem is disclosed in the present invention, in which storage capacitors of two sub-pixels of a pixel are electrically connected to a next scan line and a next scan line of the next scan line, respectively, in order for utilizing driving signals of the two scan lines to modulate voltages of the storage capacitors, so as to make the two sub-pixels have different driving voltages.Type: GrantFiled: March 3, 2009Date of Patent: July 10, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Tung-Hsin Lan, Mu-Shan Liao, Hung-Chun Li, Ming-Chang Lin
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Patent number: 8212846Abstract: A display controlling method is provided. The display controlling method includes following steps. A plurality of display data of a frame is received. The display data is analyzed to obtain a plurality of grayscale distributions corresponding to the display regions. According to the grayscale distributions, a backlight controlling signal for adjusting a brightness of each of the light emitting groups is generated. According to the backlight controlling signal, a plurality of interferences corresponding to the display data is obtained. According to the interferences, grayscales of the display data are correspondingly adjusted. Therefore, the optical interference of each of the pixels from the light emitting groups not corresponding to the pixels can be eliminated.Type: GrantFiled: November 5, 2010Date of Patent: July 3, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan
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Patent number: 8203279Abstract: A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.Type: GrantFiled: September 13, 2010Date of Patent: June 19, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chien-Yang Chen, Po-Kun Hsieh, Tung-Hsin Lan, Ming-Chang Lin
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Publication number: 20120105411Abstract: A display device including a first voltage generator, a second voltage generator, a timing controller, a level shifter and a display panel is provided. The first voltage generator is configured to generate a gate high voltage. During a first period, the gate high voltage is a first voltage. After the first period, the gate high voltage is a second voltage. The first voltage is higher than the second voltage. The second voltage generator is configured to generate a gate low voltage. According to the gate high voltage and the gate low voltage, the level shifter shifts the voltage levels of the start signal, the clock signal and the inverse signal produced by the timing controller for driving a plurality of shift registers disposed on a substrate of the display panel. The shift registers is configured to output scanning signals in sequence.Type: ApplicationFiled: June 13, 2011Publication date: May 3, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Hung-Chun Li, Chun-Chieh Wang, Tung-Hsin Lan
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Publication number: 20120092320Abstract: A liquid crystal display driving device for improving power on delay includes a gate driving circuit, a source driving circuit, and a timing control circuit. The timing control circuit is coupled to the gate driving circuit for transmitting a low-frequency frame rate lower than a normal frame rate of the liquid crystal display to operate the gate driving circuit for a predetermined number of clock cycles when a liquid crystal display powers on. Then, adjust the low-frequency frame rate to the normal frame rate of the liquid crystal display according to a trigger signal of the timing control circuit. And operate the liquid crystal display according to the normal frame rate.Type: ApplicationFiled: February 9, 2011Publication date: April 19, 2012Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan
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Publication number: 20120081038Abstract: A display panel driving voltage supply apparatus and method is disclosed. Said supply apparatus comprises: a timing controller for providing a voltage control signal and a switch control signal; a level shifter, receiving the voltage control signal for selecting a first specified voltage to be transmitted on a first driving voltage supply line as well as selecting a second specified voltage to be transmitted on a second driving voltage supply line according to the voltage control signal; and a first switch, wherein the first and the second driving voltage supply lines are electrically connected with each other to charge share between the first and the second specified voltages when the first switch is turned on under the control of the switch control signal. Said supply apparatus is capable of solving the problem of high power consumption and thereby reducing the electricity consumption.Type: ApplicationFiled: November 23, 2010Publication date: April 5, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.,Inventors: Hung-chun Li, Mu-shan Liao, Tung-hsin Lan
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Publication number: 20120068994Abstract: A display device including a timing controller and a display panel is provided. The timing controller provides a clock signal and an inverted signal of the clock signal. The display panel includes a substrate, a pixel array and a plurality of shift registers. The pixel array is disposed on the substrate. The shift registers are disposed on the substrate and respectively coupled to the timing controller. The shift registers sequentially output a plurality of scanning signals to drive the pixel array according to the clock signal and the inverted signal. In a display period of a frame period, frequencies of the clock signal and the inverted signal are a first frequency. In a vertical blanking period of the frame period, frequencies of the clock signal and the inverted signal are a second frequency. The second frequency is smaller than the first frequency.Type: ApplicationFiled: November 5, 2010Publication date: March 22, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan
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Publication number: 20120044207Abstract: An optical touch module and an optical touch display panel are provided. The optical touch module includes a first photo sensor, a second photo sensor, and a signal processing unit. The first photo sensor is disposed in one of the plurality of pixels of a pixel array. A first terminal and a control terminal of the first photo sensor are coupled to a first scan line. The second photo sensor has a first terminal coupled to a second terminal of the first photo sensor and outputting a sensing voltage, a control terminal coupled to the first terminal of the second photo sensor, and a second terminal receiving a first voltage. The signal processing unit is coupled to the first terminal of the second photo sensor, so as to convert the sensing voltage to a touch signal.Type: ApplicationFiled: October 8, 2010Publication date: February 23, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Tung-Hsin Lan, Mu-Shan Liao, Tien-Yung Huang, Feng-Shu Chang
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Publication number: 20120032990Abstract: A display device and a display controlling module are provided. The display controlling module includes a data analyzing unit, an interference data storage unit and a data adjustment unit. The data analyzing unit receives a plurality of display data of a corresponding frame, analyzes the display data to obtain a plurality of grayscale distributions of the corresponding display regions of a display panel and generates a backlight signal for adjusting a brightness of each of a plurality of light emitting groups of a backlight module according to the grayscale distributions. The interference data storage unit outputs a plurality of interferences of the corresponding display data according to the backlight controlling signal. The data adjustment unit receives the display data and the interferences and correspondingly adjusts grayscales of the display data according to the interferences.Type: ApplicationFiled: November 16, 2010Publication date: February 9, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan
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Publication number: 20120032989Abstract: A display controlling method is provided. The display controlling method includes following steps. A plurality of display data of a frame is received. The display data is analyzed to obtain a plurality of grayscale distributions corresponding to the display regions. According to the grayscale distributions, a backlight controlling signal for adjusting a brightness of each of the light emitting groups is generated. According to the backlight controlling signal, a plurality of interferences corresponding to the display data is obtained. According to the interferences, grayscales of the display data are correspondingly adjusted. Therefore, the optical interference of each of the pixels from the light emitting groups not corresponding to the pixels can be eliminated.Type: ApplicationFiled: November 5, 2010Publication date: February 9, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Hung-Chun Li, Mu-Shan Liao, Tung-Hsin Lan