Patents by Inventor Yung-Lin Lin

Yung-Lin Lin 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).

  • Patent number: 11032881
    Abstract: A controller for controlling a light source module including a first LED array and a second LED array includes a power input terminal, a first power output terminal and a second power output terminal. The power input terminal is operable for receiving electric power from a power converter. The first power terminal is coupled to the first LED array, and the second power output terminal is coupled to the second LED array. The controller is operable for delivering the electric power to the first LED array via the first power output terminal in a first sequence of discrete time slots, and for delivering the electric power to the second LED array via the second power output terminal in a second sequence of discrete time slots. The first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: June 8, 2021
    Assignee: O2Micro Inc.
    Inventors: Rong Hu, Yung-Lin Lin, Hiroshi Yamazaki, Naoyuki Fujita
  • Patent number: 10906162
    Abstract: A screw clamping device includes a body, a pressing unit, a resilient unit, a clamping unit and a connecting unit. The body is a hollow-core cylinder, is subject to axial penetration of a screwdriver, and is movable axially in synchrony with rotation of the screwdriver. The pressing unit is disposed on the body and adapted to press against a surface of a working object. The resilient unit is disposed between the body and the pressing unit. The clamping unit is rotatably connected to the body. The connecting unit has one end connected to the pressing unit and the other end connected to the clamping unit. While the body is moving axially, the connecting unit drives the clamping unit to rotate and thereby clamp or loosen screws.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: February 2, 2021
    Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Han-Hsiang Chang, Kui-Chin Liu, Yung-Lin Lin
  • Publication number: 20210029788
    Abstract: A controller for controlling a light source module including a first LED array and a second LED array includes a power input terminal, a first power output terminal and a second power output terminal. The power input terminal is operable for receiving electric power from a power converter. The first power terminal is coupled to the first LED array, and the second power output terminal is coupled to the second LED array. The controller is operable for delivering the electric power to the first LED array via the first power output terminal in a first sequence of discrete time slots, and for delivering the electric power to the second LED array via the second power output terminal in a second sequence of discrete time slots. The first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.
    Type: Application
    Filed: July 22, 2019
    Publication date: January 28, 2021
    Inventors: Rong HU, Yung-Lin LIN, Hiroshi YAMAZAKI, Naoyuki FUJITA
  • Patent number: 10660176
    Abstract: A system for driving a light source includes a power converter and control circuitry coupled to the power converter. The power converter converts input power to an output voltage to power the light source. The control circuitry senses the output voltage and senses current of the light source. The control circuitry generates a control signal based on a voltage feedback signal indicative of a combination of said output voltage and said current of said light source, and controls the power converter by the control signal to adjust the output voltage.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: May 19, 2020
    Assignee: O2Micro Inc.
    Inventors: Jen-Chun Chen, Sheng-Tai Lee, Yung-Lin Lin
  • Publication number: 20190254130
    Abstract: A system for driving a light source includes a power converter and control circuitry coupled to the power converter. The power converter converts input power to an output voltage to power the light source. The control circuitry senses the output voltage and senses current of the light source. The control circuitry generates a control signal based on a voltage feedback signal indicative of a combination of said output voltage and said current of said light source, and controls the power converter by the control signal to adjust the output voltage.
    Type: Application
    Filed: January 24, 2017
    Publication date: August 15, 2019
    Inventors: Jen-Chun Chen, Sheng-Tai LEE, Yung-Lin LIN
  • Publication number: 20190105763
    Abstract: A screw clamping device includes a body, a pressing unit, a resilient unit, a clamping unit and a connecting unit. The body is a hollow-core cylinder, is subject to axial penetration of a screwdriver, and is movable axially in synchrony with rotation of the screwdriver. The pressing unit is disposed on the body and adapted to press against a surface of a working object. The resilient unit is disposed between the body and the pressing unit. The clamping unit is rotatably connected to the body. The connecting unit has one end connected to the pressing unit and the other end connected to the clamping unit. While the body is moving axially, the connecting unit drives the clamping unit to rotate and thereby clamp or loosen screws.
    Type: Application
    Filed: January 18, 2018
    Publication date: April 11, 2019
    Inventors: Han-Hsiang Chang, Kui-Chin Liu, Yung-Lin Lin
  • Patent number: 9439255
    Abstract: A light source driving circuit for powering a first light source and a second light source by a DC voltage includes a first control circuitry and a second control circuitry. If the DC voltage is within a first range, then the first control circuitry controls a first switch and the second control circuitry controls a second switch to turn on the first light source and to regulate a current flowing through the first light source. If the DC voltage is within a second range, then the first control circuitry controls a third switch and the second control circuitry controls a fourth switch to turn on the first light source and the second light source and to regulate a current flowing through the first light source and the second light source.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: September 6, 2016
    Assignee: 02Micro Inc
    Inventors: Yung Lin Lin, Ching-Chuan Kuo, Xueshan Liu
  • Patent number: 9402286
    Abstract: A circuit includes a bridge circuit, a converter, and a controller. The bridge circuit receives power from first and second power lines of a switch and generates a rectified voltage. The switch is capable of operating in a first state in which the switch conducts power to the first power line but not the second power line, a second state in which the switch conducts power to the second power line but not the first power line, and a third state in which the switch conducts power to both the first and second power lines. The converter converts the rectified voltage to an output voltage to drive a light source, and controls a current through the light source according to a driving signal. The controller monitors the operation state of the switch and generates the driving signal based on the operation state to control brightness/dimming of the light source.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: July 26, 2016
    Assignee: O2Micro Inc
    Inventors: Yung Lin Lin, Tiesheng Yan, Ching-Chuan Kuo
  • Publication number: 20160143096
    Abstract: A light source driving circuit for powering a first light source and a second light source by a DC voltage includes a first control circuitry and a second control circuitry. If the DC voltage is within a first range, then the first control circuitry controls a first switch and the second control circuitry controls a second switch to turn on the first light source and to regulate a current flowing through the first light source. If the DC voltage is within a second range, then the first control circuitry controls a third switch and the second control circuitry controls a fourth switch to turn on the first light source and the second light source and to regulate a current flowing through the first light source and the second light source.
    Type: Application
    Filed: September 11, 2015
    Publication date: May 19, 2016
    Inventors: Yung Lin LIN, Ching-Chuan KUO, Xueshan LIU
  • Patent number: 9253843
    Abstract: A driving circuit includes a power converter, a dimming controller and a current path coupled to the dimming controller. The power converter receives input power from a rectifier and provides output power to a light source. A power switch transfers power from an AC power source to the rectifier when the power switch is on. The dimming controller receives a switch monitoring signal indicative of the state of the power switch. An average current flowing through the light source has a first value if the power switch is on. The dimming controller is operable for adjusting the average current based on the switch monitoring signal. A current flows from the AC power source through the current path to ground when the power switch is off.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: February 2, 2016
    Assignee: 02Micro Inc
    Inventors: Sheng-Tai Lee, Ching-Chuan Kuo, Yung-Lin Lin
  • Patent number: 9232591
    Abstract: A dimming controller can operate in a first mode or a second mode to control dimming of a light-emitting diode (LED) light source. The dimming controller can include a voltage control terminal and a current control terminal. The voltage control terminal provides a pulse signal when the dimming controller operates in the first mode to operate a control switch in either a first state or a second state. A first current flowing through the LED light source increases when the control switch is in the first state and decreases when the control switch is in the second state. The voltage control terminal provides a control signal to the control switch to cut off the first current when the dimming controller operates in the second mode. The current control terminal conducts a second current through the LED light source when the dimming controller operates in the second mode.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: January 5, 2016
    Assignee: O2Micro Inc.
    Inventors: Ching-Chuan Kuo, Yung Lin Lin
  • Patent number: 9030121
    Abstract: Embodiments in accordance with the present invention provide circuits and methods for driving light sources, e.g., a light-emitting diode (LED) light source. In one embodiment, a lamp includes a rectifier rectifying an AC voltage to a rectified AC voltage, an LED light source, and a switch coupled to the LED light source in series controlling a current through the LED light source according to a predetermined current reference. The LED light source and the switch coupled in series receive the rectified AC voltage while the switch is controlled linearly.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: May 12, 2015
    Assignee: O2Micro, Inc.
    Inventors: Yung Lin Lin, Ching Chuan Kuo, Sheng Tai Lee
  • Publication number: 20150022109
    Abstract: A driving circuit includes a power converter, a dimming controller and a current path coupled to the dimming controller. The power converter receives input power from a rectifier and provides output power to a light source. A power switch transfers power from an AC power source to the rectifier when the power switch is on. The dimming controller receives a switch monitoring signal indicative of the state of the power switch. An average current flowing through the light source has a first value if the power switch is on. The dimming controller is operable for adjusting the average current based on the switch monitoring signal. A current flows from the AC power source through the current path to ground when the power switch is off.
    Type: Application
    Filed: October 8, 2014
    Publication date: January 22, 2015
    Inventors: Sheng-Tai LEE, Ching-Chuan KUO, Yung-Lin LIN
  • Patent number: 8830159
    Abstract: A method according to one embodiment may include supplying power to an LED array having at least a first string of LEDs and a second string of LEDs coupled in parallel, each of the strings includes at least two LEDs. The method of this embodiment may also include comparing a first feedback signal from the first string of LEDs and a second feedback signal from the second string of LEDs. The first feedback signal is proportional to current in said first string of LEDs and said second feedback signal is proportional to current in said second string of LEDs. The method of this embodiment may also include controlling a voltage drop of at least the first string of LEDs to adjust the current of the first string of LEDs relative to the second string of LEDs, based on, at least in part, the comparing of the first and second feedback signals. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: September 9, 2014
    Assignee: O2Micro International Limited
    Inventors: Da Liu, Yung-Lin Lin
  • Publication number: 20140152187
    Abstract: A circuit includes a bridge circuit, a converter, and a controller. The bridge circuit receives power from first and second power lines of a switch and generates a rectified voltage. The switch is capable of operating in a first state in which the switch conducts power to the first power line but not the second power line, a second state in which the switch conducts power to the second power line but not the first power line, and a third state in which the switch conducts power to both the first and second power lines. The converter converts the rectified voltage to an output voltage to drive a light source, and controls a current through the light source according to a driving signal. The controller monitors the operation state of the switch and generates the driving signal based on the operation state to control brightness/dimming of the light source.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: O2 Micro Inc.
    Inventors: Yung Lin LIN, Tiesheng YAN, Ching-Chuan KUO
  • Patent number: 8581517
    Abstract: A circuit for driving a light source includes a voltage converter, a switch and a controller. The voltage converter converts an AC input voltage signal to a first rectified AC voltage signal. The voltage converter further generates an average signal proportional to an average voltage level of the first rectified AC voltage signal. The switch is coupled to the light source in series. The controller coupled to the voltage converter and the switch compares the first rectified AC voltage signal with the average signal to generate a pulse signal. The controller further generates a dimming control signal based on the pulse signal to control the switch thereby controlling dimming of the light source.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: November 12, 2013
    Assignee: O2 Micro, Inc
    Inventors: Ching-Chuan Kuo, Yung Lin Lin
  • Patent number: 8564219
    Abstract: Embodiments in accordance with the present invention provide circuits and methods for driving a light-emitting diode (LED) light source. In one embodiment, a printed circuit board (PCB) includes a bridge rectifier rectifying an AC voltage to a rectified AC voltage, an LED light source, and a first switch coupled to the LED light source in series controlling a current through the LED light source according to a predetermined current reference. The LED light source and the first switch coupled in series receive the rectified AC voltage while the first switch is controlled linearly. The circuit further includes a current path coupled in parallel with the LED light source and an illuminated switch coupled between the AC power source and the bridge rectifier.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: October 22, 2013
    Assignee: O2Micro, Inc.
    Inventors: Sheng Tai Lee, Yung Lin Lin, Chuan Chiung Kuo
  • Patent number: 8508150
    Abstract: A controller for controlling dimming of an LED light source includes a control terminal and dimming control circuitry coupled to the control terminal. The control terminal provides a driving signal to control a control switch coupled to the LED light source, thereby controlling the dimming of the LED light source. The dimming control circuitry generates the driving signal according to a set of operations of a power switch that transfers an AC signal. The dimming control circuitry further adjusts the driving signal by counting multiple waves of the AC signal to control the dimming of the LED light source.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: August 13, 2013
    Assignee: O2Micro, Inc.
    Inventors: Ching-Chuan Kuo, Yung-Lin Lin
  • Patent number: 8508142
    Abstract: A portable lighting device includes a controller, a power source that provides a voltage, and a load that includes a light emitting diode (LED) light source. The controller receives the voltage and regulates a current of the LED light source based on a sensing signal indicating the voltage of the power source. The controller regulates the current of the LED light source to a first current level if the voltage of the power source is greater than a first voltage level, and to a second current level if the voltage of the power source is less than a second voltage level. The second voltage level is less than the first voltage level. The controller regulates the current of the LED light source to vary according to the sensing signal if the voltage of the power source is between the first voltage level and the second voltage level.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: August 13, 2013
    Assignee: O2Micro Inc.
    Inventors: Yung Lin Lin, Sheng-Tai Lee
  • Publication number: 20130193877
    Abstract: A dimming controller can operate in a first mode or a second mode to control dimming of a light-emitting diode (LED) light source. The dimming controller can include a voltage control terminal and a current control terminal. The voltage control terminal provides a pulse signal when the dimming controller operates in the first mode to operate a control switch in either a first state or a second state. A first current flowing through the LED light source increases when the control switch is in the first state and decreases when the control switch is in the second state. The voltage control terminal provides a control signal to the control switch to cut off the first current when the dimming controller operates in the second mode. The current control terminal conducts a second current through the LED light source when the dimming controller operates in the second mode.
    Type: Application
    Filed: July 26, 2012
    Publication date: August 1, 2013
    Inventors: Ching-Chuan KUO, Yung Lin LIN