Patents Assigned to Light Technologies, Inc.
  • Patent number: 9307587
    Abstract: A driver circuit (e.g., an LED driver circuit) provides power to a load (e.g. an LED light source) from a DC power rail. A self-oscillating LLC series resonant inverter is configured to connect to the DC power rail, receive DC power from the DC power rail, and provide an AC output signal. A current limiting capacitor is connected to the self-oscillating LLC series resonant inverter. The current limiting capacitor receives the AC output signal from the self-oscillating LLC series resonant inverter and provides an AC current signal. The rectifier circuit receives the AC current signal from the current limiting capacitor and provides a DC current to the load.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: April 5, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 9297518
    Abstract: A backlight module including a chamber, a bottom reflector, a plurality of light sources, and a plurality of lenses is provided. The chamber has a bottom surface and a side surface. The bottom reflector is disposed inside the chamber and located on the bottom surface. The light sources are disposed inside the chamber and located above the bottom reflector. Each light source is adjacent to the side surface and provides light. The lenses are disposed on a transmission path of the light. Each lens has a back surface, a cavity on the back surface, and a light-emitting surface. The cavity has a light-incident surface. Each light source is arranged corresponding to one of the lenses and adjacent to the cavity. The light, after passing the lenses, is divided into light beams with different propagating directions. The light beams irradiate the bottom reflector.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: March 29, 2016
    Assignee: Young Lighting Technology Inc.
    Inventors: Hung-Wei Liu, Chin-Ku Liu
  • Patent number: 9295143
    Abstract: A lighting system includes circuitry to provide wireless LED driver or fluorescent ballast control without requiring changes to existing wiring setups. A power stage includes a power converter coupled across a first set of power terminals. The first power terminals are coupled to a second set of terminals via the wiring. A load stage is coupled to the second power terminals, wherein power provided across the first set of terminals is received by the load stage and deliverable to lighting devices. The load stage further includes a dimming control signal receiver coupled across the second set of power terminals and configured to receive an encoded dimming control signal. The encoded signal is transmitted across the wiring setup, wherein the power stage further includes a dimming control signal decoder coupled across the first set of power terminals and effective to deliver a decoded dimming control signal to the controller.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: March 22, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Travis L. Berry, Keith Davis
  • Patent number: 9295145
    Abstract: A magnetic device includes first and second magnetic cores defining first, second, and middle legs extending between first and second back walls, an air gap defined in the middle leg. First, second, and middle legs, and first and second back walls have a substantially equal width. A first winding is located on the first leg, a second winding located on the second leg, and a third winding located on the middle leg. The magnetic device can be part of an electronic ballast circuit including an AC power source, a positive AC rail, a negative AC rail, a resonant capacitor coupled between the positive and negative AC rails, multiple positive and negative lamp terminals configured to couple to respective gas discharge lamps, and windings on a magnetic device coupled between the positive AC rail and respective positive lamp terminals. The third winding is coupled between AC power source and positive AC rail to define a resonant inductor.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: March 22, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Donald Folker, John J. Dernovsek, Stephen D. Mays, II, Thomas M. Poehlman, Wei Xiong
  • Patent number: 9293246
    Abstract: A component printed circuit board is provided between a magnetic component and a main printed circuit board. The magnetic component includes a device such as an inductor or transformer and includes a bobbin for winding one or more coils and a magnetically permeable core. Terminal pins protrude from the bobbin toward the main printed circuit board and provide electrical connection between the magnetic component and the main printed circuit board. The component printed circuit board includes component vias positioned to accept one or more of the terminal pins allowing the terminal pins to be used for electrical connection to both the component printed circuit board and the main printed circuit board. One or more component traces or shielding layers are disposed on the component printed circuit board. Each component trace provides an electrical connection between two or more terminal pins passing through the component printed circuit board.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: March 22, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Donald Folker, David Blevins, Thomas Poehlman
  • Patent number: 9279564
    Abstract: A lighting fixture apparatus includes a light source oriented toward a illumination area. A primary reflector is disposed between the light source and the illumination area. The primary reflector includes a primary concave surface substantially facing away from the illumination area. A secondary reflector is positioned opposite the primary concave surface and includes a secondary concave surface substantially facing toward the illumination area. The primary concave surface is substantially specularly reflective, and the secondary concave surface is substantially diffusely reflective. In some embodiments, only reflected light is visible from the illumination area, and no direct light from the light source is incident on the illumination area.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: March 8, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: John R. Householder
  • Patent number: 9268165
    Abstract: A touch display device including a touch module, a display module, a tape, and an optical clear resin is provided. The display module has a polarizer. The tape is installed between the touch module and the display module, wherein a thickness of the tape is larger than a thickness of the polarizer. The tape surrounds a margin of the display module to form an accommodating space with the polarizer. The optical clear resin is disposed in the accommodating space. The touch module and the display module are adhered to each other by the optical clear resin.
    Type: Grant
    Filed: September 8, 2013
    Date of Patent: February 23, 2016
    Assignee: Young Lighting Technology Inc.
    Inventors: Yu-Feng Lin, Li-Huang Lu, Chuan-Min Lin
  • Publication number: 20160025297
    Abstract: A lens includes a central portion and a surrounding portion. The central portion has a first and a second optical surfaces. The surrounding portion surrounds the central portion and has an inner refraction wall and an outer refraction wall. The outer refraction wall includes a first and a second outer surfaces. A distance between the symmetry axis and a junction of the inner refraction wall and the first optical surface is a first radius R1. A distance between the symmetry axis and a junction of the first outer surface and the second optical surface is a second radius R2. A distance between the symmetry axis and a junction of the second outer surface and the first outer surface is a third radius R3. The third radius R3 is greater than the second radius R2, and the second radius R2 is greater than or equal to the first radius R1.
    Type: Application
    Filed: May 5, 2015
    Publication date: January 28, 2016
    Applicant: Young Lighting Technology Inc.
    Inventors: Hung-Wei Liu, Chin-Ku Liu
  • Patent number: 9240726
    Abstract: A constant current driver circuit based on a half-bridge resonant topology has a variable capacitance circuit. The driver circuit operates the half-bridge inverter at a fixed frequency. The variable capacitance circuit is configured to vary the effective capacitance of the resonant tank of the driver circuit. The driver circuit can be configured to maintain soft-switching over a wide output current range (e.g., dimming range) by selecting a resonant capacitor value effective to maintain soft switching given the fixed frequency of the half-bridge inverter.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 19, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 9237625
    Abstract: A light fixture includes a light source driver circuit and a light engine. The light engine includes a light source and a temperature sensor configured to sense a temperature of the light source. The driver circuit includes a temperatures sensing circuit operable to connect to the temperature sensor and provide a temperature signal indicative of the temperature of the light source. The driver circuit monitors the temperature signal and shuts down an output current provided to the light source when the temperature is outside of a predetermined operating range. The driver circuit is configured to interface with a thermistor or normally bi-metal switch temperature sensor without alteration.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Stephen D. Mays, II, John J. Dernovsek, Michael Diaz-Tello, Bobby Srisan
  • Patent number: 9237613
    Abstract: A constant current driver circuit is operable to provide power to a light source. The driver circuit utilizes a microcontroller based oscillator to drive a current source tank circuit. The microcontroller based oscillator is controlled by a differential error feedback signal. The differential error feedback signal is produced by a proportional integral control loop. The proportional integral control loop is used to eliminate steady state error of the driver circuit. Dynamic frequency or duty cycle control of the current source tank circuit by the microcontroller is based on the integrated error signal between a reference current signal and a sensed output current of the current source tank circuit.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, John J. Dernovsek, Candice Ungacta
  • Patent number: 9237617
    Abstract: An inductor-less LED driver circuit is provided with soft startup and inherent current limiting capabilities. A diode rectifier is coupled across an AC mains input, with the outputs for the rectifier coupled directly across an LED array. A bi-directional switching circuit and current limiting capacitor are coupled in series between a first mains input and a first rectifier input. A controller turns the bi-directional switching circuit on and off to enable or disable conduction of power from the AC power source, wherein the bi-directional switching circuit is turned on in association with a detected zero voltage state for AC input power, and the bi-directional switching circuit is turned off in association with a detected zero current state for AC input power. The controller further adjusts switch states for the bi-directional switching circuit in response to a dimming control signal corresponding to a desired lighting output level.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 9237621
    Abstract: A buck-boost LED driver circuit is provided with floating IC driving control. A DC power supply is provided with first and second inputs, the second input coupled to a mains ground. A PFC switching circuit is coupled to the first input and operable to drive an LED load. A current sensor is coupled to the switching circuit and configured to provide feedback signals representative of current through the LED load, and a dimming control circuit is coupled to the mains circuit ground and effectively superposes an external dimming control signal with the load feedback signal. A PFC controller is configured to provide driver signals to a switching element based on the superposed dimming and load feedback signals as compared to an internal reference. Each of the switching element, the current sensor and the controller are commonly coupled to a floating circuit ground.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 9236179
    Abstract: An interconnectable bobbin has first and second end flanges and a fastener on the first end flange positioned to engage a second bobbin on an adjacent leg of a multiple leg magnetic core. A magnetic component apparatus includes one or more of the interconnectable bobbins, the magnetic component apparatus including a magnetic core with first and second legs, the first leg extending into a first bobbin, and the second leg extending into a second bobbin, wherein the first and second bobbins are fastened together.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Donald Folker, Mike LeBlanc
  • Patent number: 9234650
    Abstract: A lens for distributing light from a light emitter in a desired asymmetric illumination profile includes a lens body having an input side and an output side. The input side receives light from an emitter, and the output side includes a major total internal reflection surface and a refractive surface. A primary emission axis associated with the emitter is defined through the lens body, and a transverse reference plane is positioned parallel to the primary emission axis. A desired illumination region is located on a first side of the reference plane, and a desired dark region is located on a second side of the reference plane. In some embodiments, the total internal reflection surface is entirely positioned on the second side of the reference plane. In additional embodiments, the total internal reflection surface includes a plurality of substantially planar adjacent longitudinal faces.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Henning Dieker, John R. Householder
  • Patent number: 9237636
    Abstract: An electronic ballast is provided with a filament heating circuit having a Q factor clamped at a certain range of preheat frequency. An inverter circuit includes a pair of switches coupled between positive and negative terminals of a power supply, which oscillate at an operating frequency and generate an output voltage. A main resonant tank is coupled between an inverter output and the negative power supply terminal. A filament heating resonant tank includes a primary winding of a filament heating transformer coupled on a first end in series with the resonant capacitor, first and second capacitors coupled in series between the second end of the primary winding and the negative power supply terminal. A clamping circuit coupled to the second capacitor during a preheat mode of operation clamps an amplitude of the voltage across the primary winding to an amplitude of the input voltage from the power supply.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: January 12, 2016
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Brandon Dyer
  • Patent number: 9232667
    Abstract: A display device includes a casing, a frame, a backlight module, at least one cable, and a display panel. The casing has a display opening. The frame is disposed in an inner edge of the display opening, wherein the frame has at least a cable management groove and a support surface. The backlight module is disposed on the frame. The cable is disposed in the cable management groove. The display panel is disposed on the frame and located in the display opening, wherein an edge portion of the display panel is located on the support surface, and the support surface supports the edge portion of the display panel. A part of the cable management groove is located under the display panel and at least partially overlapped with the edge portion.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: January 5, 2016
    Assignee: Young Lighting Technology Inc.
    Inventors: Shun-Ying Cheng, Bing-Han Tsai, Chun-Chung Hsiao
  • Patent number: 9224318
    Abstract: A light source module including an optical film, a bottom reflector, a top reflector, a light converging element, and a light emitting element is provided. The bottom reflector is located under the optical film. The top reflector and the light converging element are located at opposite sides of the optical film. The optical film, the bottom reflector, the top reflector, and the light converging element enclose a space. The light converging element has a first portion, a second portion, and a third portion. The light emitting element is disposed in the space and has an optical axis direction, where the third portion has a first surface facing the first portion, a first angle having a range of 5-10 degrees is included between the optical axis direction and a connection line between the light emitting element and one end of the first surface away from the light emitting element.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: December 29, 2015
    Assignee: Young Lighting Technology Inc.
    Inventors: Hung-Wei Liu, Chin-Ku Liu
  • Patent number: 9213430
    Abstract: A touch panel includes a transparent substrate and a touch module disposed thereon. The touch module includes a first stack structure that includes the following elements. A transparent carrying layer has an active area, an extending area, and a plurality of bending segments respectively connecting the active area and the extending area. A patterned conductive layer has an electrode pattern area and a plurality of bonding pads that extend from the electrode pattern area disposed on the active area. A plurality of extending wires connect the bonding pads, and extend to the extending area. A transparent adhesive layer covers the electrode pattern area. A wire protection layer covers a portion of each extending wire on the corresponding extending area. The transparent adhesive layer covers a portion of the bonding pads.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: December 15, 2015
    Assignee: Young Lighting Technology Inc.
    Inventors: Wu-Hsieh Lee, Wei-Cheng Huang, Chwen-Tay Hwang
  • Patent number: 9203321
    Abstract: A light fixture includes a housing, a non-isolated driver circuit with a boost type voltage doubler output stage, and a light source. The load or light source may be a plurality of LEDs. The housing supports the light source and the driver circuit, and the housing may include a lens for the one or more LEDs of the light source. The driver circuit provides power from the power source to the light source. The light source provides light in response to receiving power. The boost type voltage doubler output stage is a voltage doubler output stage having a boost inductor connected between an input (e.g., connected to an output of an inverter of the driver circuit) and an output (e.g., connected to the load or light source) of the boost type voltage doubler output stage.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 1, 2015
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong