Patents by Inventor Yen-Ynn Chou
Yen-Ynn Chou 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: 8654156Abstract: A driver circuit for driving at least a pixel of a displayer, including an output stage, a calibration device and a surge suppression device. The output stage is coupled to the pixel and controlled by a pixel signal to switch an output voltage on the pixel between a high level and a low level. The calibration device is coupled between the output stage and the pixel and comprises an input end controlled by a bias voltage to calibrate an equivalent resistance of the calibration device for further calibrating a brightness level of the pixel. The surge suppression device is coupled between the input end of the calibration device and the pixel signal, and is used to suppress surges in the bias voltage which occur due to switching of the output voltage.Type: GrantFiled: December 30, 2009Date of Patent: February 18, 2014Assignee: Princeton Technology CorporationInventor: Yen-Ynn Chou
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Patent number: 8514212Abstract: A drive circuit of a displayer for driving at least a pixel, including: an output stage coupled to the pixel and controlled by a pixel signal to switch an output voltage on the pixel; a calibration device coupled between the output stage and the pixel and including an input end controlled by a bias voltage further calibrating the brightness of the pixel; a stabilizing device coupled between the input end of the calibration device and the pixel signal for stabilizing the voltage on the input end of the calibration device to be at the level of the bias voltage after a variation; and a accelerating device coupled between the stabilizing device and a voltage source for generating the bias voltage and accelerating the speed stabilizing the voltage on the input end of the calibration device to be at the level of the bias voltage.Type: GrantFiled: November 9, 2009Date of Patent: August 20, 2013Assignee: Princeton Technology CorporationInventor: Yen-Ynn Chou
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Patent number: 8405684Abstract: A drive circuit of a carbon nanotube display (CNDP) used to drive at least a pixel of a CNDP is provided, having an output stage and a calibration device. The output stage is coupled to the pixel and controlled by a pixel signal to switch the pixel between a high voltage and a low voltage. The calibration device is coupled between the output stage and the pixel and controlled by a bias to calibrate the equivalent resistance of the calibration device and further calibrate the brightness of the pixel.Type: GrantFiled: September 23, 2009Date of Patent: March 26, 2013Assignee: Princeton Technology CorporationInventor: Yen-Ynn Chou
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Patent number: 8089427Abstract: The invention provides display control circuits for Vacuum Fluorescent Displays (VFDs). The display control circuit controls a plurality of display units of the VFD and comprises an image signal generator generating a plurality of image signals, a clock signal generator generating a clock signal, and a plurality of control signal generators. Each control signal generator receives one of the image signals and the clock signal, generates a control signal for one of the display unit, and determines the duty cycle of the control signal according to the received image signal and the clock signal. The brightness of one display unit varies with the duty cycles of the corresponding control signal. The clock signal generator comprises a plurality of flip-flops coupled in series and a plurality of logic gates.Type: GrantFiled: September 25, 2007Date of Patent: January 3, 2012Assignee: Princeton Technology CorporationInventor: Yen-Ynn Chou
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Patent number: 7793177Abstract: A chip testing device having a plurality of testing units is provided. Each testing unit comprises a selector, a flip-flop unit, a first buffer and a second buffer. The selector is controlled by a control signal and has a first input terminal, a feedback input terminal, and a first output terminal. The flip-flop unit has a second input terminal coupled to the first output terminal, a clock signal input terminal for receiving a reference clock signal, and a second output terminal outputting an output data. The first buffer is coupled to the flip-flop unit to convert the output data to a high voltage data, and outputs the high voltage data. The second buffer is coupled to the first buffer to convert high voltage data to low voltage data and transmit the low voltage data to the feedback input terminal.Type: GrantFiled: April 9, 2007Date of Patent: September 7, 2010Assignee: Princeton Technology CorporationInventors: Yen-Wen Chen, Yen-Ynn Chou
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Publication number: 20100165008Abstract: A driver circuit for driving at least a pixel of a displayer, including an output stage, a calibration device and a surge suppression device. The output stage is coupled to the pixel and controlled by a pixel signal to switch an output voltage on the pixel between a high level and a low level. The calibration device is coupled between the output stage and the pixel and comprises an input end controlled by a bias voltage to calibrate an equivalent resistance of the calibration device for further calibrating a brightness level of the pixel. The surge suppression device is coupled between the input end of the calibration device and the pixel signal, and is used to suppress surges in the bias voltage which occur due to switching of the output voltage.Type: ApplicationFiled: December 30, 2009Publication date: July 1, 2010Inventor: Yen-Ynn CHOU
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Publication number: 20100164930Abstract: A drive circuit of a displayer for driving at least a pixel, including: an output stage coupled to the pixel and controlled by a pixel signal to switch an output voltage on the pixel; a calibration device coupled between the output stage and the pixel and including an input end controlled by a bias voltage further calibrating the brightness of the pixel; a stabilizing device coupled between the input end of the calibration device and the pixel signal for stabilizing the voltage on the input end of the calibration device to be at the level of the bias voltage after a variation; and a accelerating device coupled between the stabilizing device and a voltage source for generating the bias voltage and accelerating the speed stabilizing the voltage on the input end of the calibration device to be at the level of the bias voltage.Type: ApplicationFiled: November 9, 2009Publication date: July 1, 2010Applicant: PRINCETON TECHNOLOGY CORPORATIONInventor: Yen-Ynn CHOU
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Publication number: 20100128068Abstract: A drive circuit of a carbon nanotube display (CNDP) used to drive at least a pixel of a CNDP is provided, having an output stage and a calibration device. The output stage is coupled to the pixel and controlled by a pixel signal to switch the pixel between a high voltage and a low voltage. The calibration device is coupled between the output stage and the pixel and controlled by a bias to calibrate the equivalent resistance of the calibration device and further calibrate the brightness of the pixel.Type: ApplicationFiled: September 23, 2009Publication date: May 27, 2010Inventor: Yen-Ynn CHOU
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Patent number: 7659767Abstract: A level shifter including a first boost circuit, an inverter, a second boost circuit and a level shift circuit is disclosed. The first boost circuit receives an input signal, and a first amplification factor for the input signal is determined based on a control signal. The inverter receives the input signal to generate an inverted input signal. The second boost circuit is coupled to an output terminal of the inverter to receive the inverted input signal, and a second amplification factor for the inverted input signal is determined based on the control signal. The level shift circuit has a first input terminal and a second input terminal respectively coupled to output terminals of the first boost circuit and second boost circuit to change the voltage level of output signals from the first boost circuit and second boost circuit to a first voltage level.Type: GrantFiled: August 19, 2008Date of Patent: February 9, 2010Assignee: Princeton Technology CorporationInventors: Yen-Wen Chen, Yen-Ynn Chou
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Publication number: 20090115755Abstract: A vacuum fluorescent display driving circuit is disclosed. The vacuum fluorescent display driving circuit is used for driving a vacuum fluorescent display to avoid unusual displaying caused by coupling of the vacuum fluorescent display. The vacuum fluorescent display driving circuit includes a first output pin set and a second output pin set. The first output pin set includes a plurality of first output pins and each of them includes two metal oxide semiconductor transistors, the second output pin set includes a plurality of second output pins and each of them includes a metal oxide semiconductor transistor and a resistor. No coupling effect will take place when the first output pin set and the second output pin set operate in the vacuum fluorescent display driving circuit.Type: ApplicationFiled: October 28, 2008Publication date: May 7, 2009Inventor: Yen-Ynn CHOU
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Publication number: 20080303578Abstract: A level shifter including a first boost circuit, an inverter, a second boost circuit and a level shift circuit is disclosed. The first boost circuit receives an input signal, and a first amplification factor for the input signal is determined based on a control signal. The inverter receives the input signal to generate an inverted input signal. The second boost circuit is coupled to an output terminal of the inverter to receive the inverted input signal, and a second amplification factor for the inverted input signal is determined based on the control signal. The level shift circuit has a first input terminal and a second input terminal respectively coupled to output terminals of the first boost circuit and second boost circuit to change the voltage level of output signals from the first boost circuit and second boost circuit to a first voltage level.Type: ApplicationFiled: August 19, 2008Publication date: December 11, 2008Inventors: Yen-Wen CHEN, Yen-Ynn CHOU
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Publication number: 20080224959Abstract: The invention provides display control circuits for Vacuum Fluorescent Displays (VFDs). The display control circuit controls a plurality of display units of the VFD and comprises an image signal generator generating a plurality of image signals, a clock signal generator generating a clock signal, and a plurality of control signal generators. Each control signal generator receives one of the image signals and the clock signal, generates a control signal for one of the display unit, and determines the duty cycle of the control signal according to the received image signal and the clock signal. The brightness of one display unit varies with the duty cycles of the corresponding control signal. The clock signal generator comprises a plurality of flip-flops coupled in series and a plurality of logic gates.Type: ApplicationFiled: September 25, 2007Publication date: September 18, 2008Inventor: Yen-Ynn Chou
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Publication number: 20080136487Abstract: A level shifter including a first boost circuit, an inverter, a second boost circuit and a level shift circuit is disclosed. The first boost circuit receives an input signal, and a first amplification factor for the input signal is determined based on a control signal. The inverter receives the input signal to generate an inverted input signal. The second boost circuit is coupled to an output terminal of the inverter to receive the inverted input signal, and a second amplification factor for the inverted input signal is determined based on the control signal. The level shift circuit has a first input terminal and a second input terminal respectively coupled to output terminals of the first boost circuit and second boost circuit to change the voltage level of output signals from the first boost circuit and second boost circuit to a first voltage level.Type: ApplicationFiled: March 27, 2007Publication date: June 12, 2008Inventors: Yen-Wen Chen, Yen-Ynn Chou
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Publication number: 20080137442Abstract: A data read circuit for a memory without a complex pre-charge circuit is provided. A diode is coupled between a pair of bit lines to replace the pre-charge circuit. A voltage drop caused by the diode is substantially half the operating voltage of the memory.Type: ApplicationFiled: May 24, 2007Publication date: June 12, 2008Inventors: Yen-Wen Chen, Yen-Ynn Chou
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Publication number: 20080086667Abstract: A chip testing device having a plurality of testing units is provided. Each testing unit comprises a selector, a flip-flop unit, a first buffer and a second buffer. The selector is controlled by a control signal and has a first input terminal, a feedback input terminal, and a first output terminal. The flip-flop unit has a second input terminal coupled to the first output terminal, a clock signal input terminal for receiving a reference clock signal, and a second output terminal outputting an output data. The first buffer is coupled to the flip-flop unit to convert the output data to a high voltage data, and outputs the high voltage data. The second buffer is coupled to the first buffer to convert high voltage data to low voltage data and transmit the low voltage data to the feedback input terminal.Type: ApplicationFiled: April 9, 2007Publication date: April 10, 2008Inventors: Yen-Wen Chen, Yen-Ynn Chou