Series Connected Load Devices Patents (Class 315/122)
  • Patent number: 10559556
    Abstract: An optoelectronic semiconductor component is disclosed, comprising: a semiconductor body (1) having a semiconductor layer sequence (2) with a p-type semiconductor region (3), an n-type semiconductor region (5), and an active layer (4) arranged between the p-type semiconductor region (3) and the n-type semiconductor region (5); a support (10) having a plastic material and a first via (11) and a second via (12); a p-contact layer (7) and an n-contact layer (8), at least some regions of which are arranged between the support (10) and the semiconductor body (1), wherein the p-contact layer (7) connects the first via (11) to the p-type semiconductor region (3) and the n-contact layer (8, 8A) connects the second via (12) to the n-type semiconductor region (5); and an ESD protection element (15) which is arranged between the support (10) and the semiconductor body (1), wherein the ESD protection element (15) is electrically conductively connected to the first via (11) and to the second via (12), and wherein a forwar
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: February 11, 2020
    Assignee: OSRAM OPTO SEMICONDUCTORS GMBH
    Inventors: Christian Leirer, Korbinian Perzlmaier
  • Patent number: 10555392
    Abstract: An illumination system comprising a light source including a linear array of color variable light emitting elements; a power supply coupled to the array; and a power regulating circuit, coupled between the power supply and the array, effective to activate the light emitting elements to emit light in accordance with a color profile that varies as a function of location on at least a portion of the array. In a specific implementation, the invention includes a camera or other sensor for detecting ambient lighting conditions. This enables the system to adjust the array to achieve ambient lighting conditions in accordance with user preferences or profile. In yet another embodiment, lighting conditions at a remote location at a specific time are sensed by a smartphone camera or other device and coupled to the power regulating circuit for use in adjusting the array to achieve a match of ambient lighting to that or a remote location and time, subject to user adjustments, profile and/or preferences.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: February 4, 2020
    Inventor: Mary L. Ellis
  • Patent number: 10537008
    Abstract: An apparatus for driving LEDs using high voltage includes two LED driving circuits and two switches controlled by a universal controller so as to connect the two LED driving circuits in two different configurations. Each LED driving circuit has an LED unit formed by a plurality of LED segments. Each LED segment has an associated bypass switch controlled by an LED controller to bypass or connect the LED segment in the LED unit. When an input voltage ranges from rectified 90 volt AC to rectified 140 volt AC, the two switches are controlled to connect the two LED driving circuits in parallel. When the input voltage ranges from rectified 180 volt AC to rectified 265 volt AC, the two switches are controlled to connect the LED segments of the LED unit in one LED driving circuit in series with the other LED driving circuit.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: January 14, 2020
    Assignee: VastView Technology Inc.
    Inventors: Hung-Chi Chu, Yuhren Shen
  • Patent number: 10499471
    Abstract: A lighting module includes a light emitter including a first light-emitting diode (LED) string configured to emit light of a first color temperature and a second LED string configured to emit light of a second color temperature, a terminal unit configured to provide terminals capable of supplying a driving current to at least one of the first LED string and the second LED string, and a balancing unit including a first balance LED, a second balance LED, a first balance resistor, and a second balance resistor, the balancing unit configured to adjust a mixed color temperature, and reduce a luminance difference between the light of the mixed color temperature and one of the light of the first color temperature and the light of the second color temperature.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: December 3, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-cheol Bong, Min-soo Han
  • Patent number: 10448467
    Abstract: Embodiments of wave-based lighting efficiencies are provided. As an example, a method includes determining a characteristic of a voltage from an alternating current (AC) waveform, where the AC waveform is configured to power a load, and wherein the AC waveform includes positive voltage portions, negative voltage portions, and zero axis points. Some embodiments include determining a first position in the AC waveform to create a first step with a first step voltage and applying the AC waveform at the first step to a first predetermined portion of the load, where the first predetermined portion of the load has a first voltage rating that corresponds to the first step voltage.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: October 15, 2019
    Assignee: Earth Star Solutions, LLC
    Inventor: Gary Bret Millar
  • Patent number: 10429016
    Abstract: An LED light string has a plug, a socket, a lighting string connected between the plug and the socket, and a control circuit provided in either the plug or the socket. The control circuit uses at least one current controller to control a driving current flowing through the lighting string stably. When a temperature of the lighting string exceeds a threshold, the current controller activates its over-temperature protection function to lower the driving current. When short-circuit occurs on the lighting string, the current controller activates its short-circuit protection function to lower the driving current.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: October 1, 2019
    Inventor: Chen-Sheng Yang
  • Patent number: 10432089
    Abstract: A method for optimizing the operation of a digital controller provided in a control loop for a step-up converter. The method includes: evaluating at least one output variable of the digital controller during operation of the step-up converter; estimating the instantaneous load resistance value in the path of the control loop based on the at least one evaluated output variable; setting at least one controller coefficient of the digital controller based on the estimated instantaneous load resistance value during operation of the step-up converter. A change in the setting of the at least one controller coefficient results in a change in the transition frequency in the control loop. Furthermore, a control loop for a step-up converter that includes a digital controller is provided, which is configured to carry out the steps of the method. A computer program product that includes computer-executable program code for carrying out the method.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 1, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Samuel Quenzer-Hohmuth, Steffen Ritzmann, Thoralf Rosahl, Bernhard Wicht
  • Patent number: 10426013
    Abstract: A ground fault detection circuit includes an input portion, and a ground fault determination unit. The input portion inputs an anode voltage of a series connection unit constituted of a plurality of light emission elements. When an anode voltage of the series connection unit input by the input portion is lower than or equal to a predetermined value less than a product of an on-resistance of the short-circuit switch disposed in parallel to each of the light emission elements and current supplied to the series connection unit, the ground fault determination unit determines that a ground fault has occurred without the short-circuit switch in a ground fault path.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: September 24, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshiyuki Nakatani, Shinsuke Takagimoto
  • Patent number: 10390390
    Abstract: An electronic apparatus and a light-emitting module driving circuit thereof are provided. The electronic apparatus includes a light-emitting module and a driving circuit. The driving circuit is coupled to the light-emitting module and is configured to generate a driving signal set to drive the light-emitting module. The driving circuit includes a first driver, a second driver, and a switching circuit. The first driver receives a control signal related to an operation status of the electronic apparatus and generates a first signal set according to the control signal. The second driver includes at least one resistor which receives system power and accordingly generates a second signal set. The switching circuit is coupled to the first driver and the second driver to receive the first signal set and the second signal set, respectively. When the switching circuit does not receive the first signal set, the switching circuit takes the second signal set as the driving signal set.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: August 20, 2019
    Assignee: PEGATRON CORPORATION
    Inventors: Sheng-Tsai Wu, Chun-Hsien Chen, Yi-Chun Chou
  • Patent number: 10362643
    Abstract: A light emitting diode (LED) driver circuit includes an LED string and a conducting state detection circuit. The conducting state detection circuit detects a conducting state of the LED string, and generates a discharge control signal upon sensing that the LED string is in a non-conducting state. A current source generates a discharge current according to the discharge control signal when the LED string is in the non-conducting state. A passive bleeder provides current compensation by internal regulator operation. An LED spike current suppression circuit suppresses spike current that can occur when the input voltage increases above a threshold. A bias supply circuit has an input capacitor that provides a bias voltage.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: July 23, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Young-Jong Kim, Hyun-Chul Eum
  • Patent number: 10362648
    Abstract: An optoelectronic circuit for receiving a variable voltage containing alternating increasing and decreasing phases, the optoelectronic circuit including a plurality of groups of light-emitting diodes and a switching device for allowing or interrupting the circulation of a current through each group, the switching device also being suitable for detecting whether said variable voltage is supplied by a dimmer.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: July 23, 2019
    Assignee: Aledia
    Inventor: Frédéric Mercier
  • Patent number: 10314138
    Abstract: A control device comprising at least one input connector (x1, x2) configured to electrically connect an operating device (1) for driving lighting means (3a, 3b), and at least one output connector (x3, x4, x5) configured to electrically connect at least one of the lighting means (3a, 3b), a control means (4) configured to switch the lighting means (3a, 3b) based on a control signal, and a circuit (5) configured to generate voltage for supplying the control means (4) from a constant current that is generated from the operating device (1) for driving the lighting means (3a, 3b).
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: June 4, 2019
    Assignee: TRIDONIC GMBH & CO KG
    Inventors: Ronnie Li, Markus Kuenzli, Tjaco Middel
  • Patent number: 10314128
    Abstract: A dimming control power supply for LED lamps, comprises a first secondary power supply module, an output control module, a PWM signal receiving module, and a control signal converting module. The output control module is configured to adjust the output current according to the received constant DC voltage signal with a variable amplitude. The control signal converting module converts the PWM signal received by the PWM signal receiving module into a constant DC voltage signal with a variable amplitude. The output control module adjusts the output current according to the constant DC voltage signal with a variable amplitude to adjust the brightness of the LED lamps. The light source provided by the LED lamp powered by the dimming control power supply for the LED lamps doesn't form streaks in the photographs taken by the cell phone or the camera and thus enhances the user's light experience.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: June 4, 2019
    Assignee: Self Electronics Co., Ltd.
    Inventors: Biao Wang, Lihong Tong
  • Patent number: 10259382
    Abstract: An autonomous vehicle is disclosed. The vehicle comprises a chassis, two or more drive wheels extending below the chassis, a drive motor housed within the chassis for driving the drive wheels, and a payload surface on top of the chassis for carrying a payload. An illumination system, for emitting light from at least one portion of the chassis, is mounted substantially around the entire perimeter of the chassis. The illumination system may be implemented using an array of light-emitting diodes (“LEDs”) that are arranged as segments. For example, there may be “headlight” segments on the front left and front right corners of the chassis.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: April 16, 2019
    Inventors: Simon Drexler, Matthew Allen Rendall, Ryan Christopher Gariepy, Mike Hanuschik, Paul Mohr
  • Patent number: 10244602
    Abstract: Examples of the present disclosure are related to systems and methods for a voltage snubber circuit utilizing with light fixtures. More particularly, embodiments disclose a voltage snubber that is configured to prevent higher voltages being applied to a light emitting diode (LED) string.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 26, 2019
    Assignee: Fluence Bioengineering, Inc.
    Inventors: Paul Morganstern, Randall Johnson
  • Patent number: 10236712
    Abstract: Aspects are described for dual-distribution lighting devices. For example, a dual-distribution lighting device includes a forward-throw module with a first lighting element that can provide directional light, a wide-throw module with a second lighting element that can provide light with a wide distribution, an interface element that can to receive input, and a processing device. In response to the input being received via the interface element, the processing device deactivates one of the forward-throw and wide-throw modules and activates the other of the forward-throw and wide-throw modules, thereby causing the dual-distribution lighting device to switch between providing directional light and a wide distribution of light.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: March 19, 2019
    Assignee: ABL IP Holding LLC
    Inventors: Kenneth Edwin Nelson, Michael G. Hanley, Dale R. Bowles, Jr.
  • Patent number: 10192487
    Abstract: A pixel circuit, a driving method, an organic electroluminescent display panel, and a display device, the pixel circuit includes a light emitting element, a driving control module, a resetting control module, a charging control module, a writing control module, and a light emitting control module; the resetting control module resets the first node and the light emitting element; the charging control module charges the second node through the light emitting control module and discharges the second node through the driving control module and the resetting control module; the writing control module writes a data signal to the second node; and the light emitting control module controls the driving control module to drive the light emitting element to emit light.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: January 29, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Zhanjie Ma
  • Patent number: 10178746
    Abstract: Apparatus, systems, and methods for controlling light output in a lighting system based on defined light profiles are provided. In one example implementation, a light fixture can include a first light emitting diode (LED) array having one or more LED light sources and a second LED array having one or more LED light sources. The light fixture can include a power circuit configured to provide power to the first LED array and the second LED array according to a power distribution among the first LED array and the second LED array. The light fixture can include one or more control devices configured to control the power circuit to adjust the power distribution among the first LED array and the second LED array based at least in part on a signal indicative of a real time clock and a defined light profile associated with a user identified to be present in a space illuminated by the light fixture.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: January 8, 2019
    Assignee: Hubbell Incorporated
    Inventors: Pritam Yadav, Chris Bailey
  • Patent number: 10172208
    Abstract: Disclosed in the present invention is a method for adjusting a color temperature of an LED in a single light fixture. In the method, at least two light-emitting modules in a single light fixture are respectively electrically connected to a switch, each light-emitting module is independently adjusted by a switch corresponding to the light-emitting module, and the light-emitting modules have different color temperatures. Therefore, the brightness of each light-emitting module can be respectively controlled by using each switch, so that emitted light of the single light fixture has more than three color temperatures.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: January 1, 2019
    Assignee: ZHONGSHAN LUXMODE INDUSTRIAL CO., LTD.
    Inventors: Wei-Lun Chao, Yung Lung Cheng
  • Patent number: 10032417
    Abstract: According to one embodiment, a light source device includes a plurality of light emitting elements including at least first and second light emitting elements, lightguide, first circuit, second circuit, and controller. The lightguide includes a first surface on which light from light emitting elements is incident and a second surface through which the light exits. The first circuit connects light emitting elements in series. The second circuit can bypass each of light emitting elements. The controller turns on light emitting elements using the first circuit if light emitting elements function normally, and if one of light emitting elements functions abnormally, the controller turns on the light emitting element functioning normally using the second circuit.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: July 24, 2018
    Assignee: Japan Display Inc.
    Inventors: Susumu Kimura, Kazuhiko Sako, Tadafumi Ozaki, Naoyuki Takasaki, Fumitaka Gotoh, Tsutomu Harada
  • Patent number: 9942971
    Abstract: Apparatus and systems are disclosed for detecting outages in an LED lamp assembly. An example disclosed lamp assembly includes a plurality of LED circuits serially connected together. The LED circuits include an LED, a first resistor and an optocouper. The example disclosed lamp assembly also includes a sense line electrically coupled to one of the LED circuits. The sense line has a first voltage value when all of LEDs in that plurality of LED circuits are operational and a second voltage value when at least one of the LEDs has failed.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: April 10, 2018
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Ronald Patrick Brombach, John Barrs
  • Patent number: 9900944
    Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a voltage (VH12) higher than VH2, the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a voltage (VHa); an IC1 including a light emission control unit (HC1) arranged to cause light emission of a light emitting element group (HS) if a voltage (Vk) is higher than VHa, and to stop the light emission if Vk is lower than the same; and an IC2 including a light emission control unit (HC2) arranged to cause light emission of a group (HSa) if Vk is higher than VHa, and to turn off the group (HSa) if Vk is lower than the same.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: February 20, 2018
    Assignee: Rohm Co., Ltd.
    Inventors: Noboru Takizawa, Masaaki Nakayama
  • Patent number: 9872348
    Abstract: A lighting circuit and a method of operating a lighting circuit are described. A rectifier 14 has an input for an alternating voltage V. At least a first and a second LED assembly 20, 22 are connected to be supplied with electrical power from the rectifier 14. The first LED assembly 20 is electrically connected to a first output 26 of the rectifier 14 and electrically connected in series with an input 36 of a switching converter circuit. The second LED assembly 22 is electrically connected to an output 48 of the switching converter circuit 44. A control assembly 30 is connected to a tap 46 in the series connection for controlling operation of the first LED assembly 20.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: January 16, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Kumar Arulandu, Johan-Paul Marie Gerard Linnartz, Eugen Jacob De Mol, Dmytro Viktorovych Malyna, Henricus Marius Joseph Maria Kahlman
  • Patent number: 9844105
    Abstract: A lighting device includes a rectifier circuit, a driver circuit and a shunt circuit. The driver circuit is configured to apply respective voltage components contained in a pulsating voltage from the rectifier circuit every period of the pulsating voltage across part and all of solid light sources in response to the pulsating voltage and respective ON voltages of light source circuits including the part and all of the solid light sources. The shunt circuit is electrically connected in parallel with a light source circuit having a lowest ON voltage of the light source circuits, and configured to set a value of an output current from the rectifier circuit to a value proportional to a value of the pulsating voltage while the pulsating voltage is less than the lowest ON voltage.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: December 12, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shigeru Ido
  • Patent number: 9756689
    Abstract: A light output control device includes a switching device, multiple signal input ports, a signal selection circuit, and a control circuit. The switching device is to be electrically connected between a direct-current power supply and a light source circuit. The light source circuit includes a semiconductor light emitting element. The multiple signal input ports respectively correspond to multiple kinds of light output control signals. The signal selection circuit selects, when receiving two or more light output control signals indicating different light output levels through the multiple signal input ports, a light output control signal indicating a lowest (or highest) light output level, from the two or more light output control signals. The control circuit performs switching control of the switching device with a duty cycle corresponding to the lowest (or highest) light output level indicated by the light output control signal selected by the signal selecting circuit.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: September 5, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shigeru Ido, Katsuhiko Ishikawa, Hirohiko Nojiri
  • Patent number: 9750099
    Abstract: A light emitting device with low voltage-endurance components includes a light emitting diode string, M first control circuits, a detection unit and a current control circuit. The light emitting diode string includes M first light emitting diodes connected in series. Each first control circuit includes a first switch. One end of the light emitting string is coupled to a node of an input voltage. The first switch is connected to its related first light emitting diode in parallel and can enable a bypass current path. The detection unit detects the potential of the input voltage to produce a current detection signal. The current control circuit is coupled to the M-th one of the M first control circuits and the detection unit and controls the M-th one of the M first control circuits to selectively enable the bypass current path according to the current detection signal.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: August 29, 2017
    Assignee: TM TECHNOLOGY, INC
    Inventors: Kuo-Tso Chen, Chi-Cheng Chao, Chih-Yueh Yen
  • Patent number: 9713210
    Abstract: A system, in some embodiments, comprises: multiple light emitting diode (LED) strings configurable in series or in parallel depending on a supply voltage provided in the system; and multiple current regulators, a different one of the multiple current regulators coupled to each of the multiple LED strings and configured to regulate current passing through a respective LED string, wherein at least one of the multiple current regulators is bypassed when the multiple LED strings are configured in series.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: July 18, 2017
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Andrew Niles, Andrew K. Stemple, Kevin Joseph O'Connor
  • Patent number: 9686833
    Abstract: An LED driving apparatus according to an exemplary embodiment of the present inventive concept may include a rectifier circuit rectifying alternating current (AC) power to generate driving power for operating a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches connected to respective output terminals of the plurality of LED arrays and controlling a path of a current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches according to a magnitude of the driving power; and a current controlling circuit connected to the output terminal of at least one of the plurality of LED arrays and controlling a current flowing in the at least one LED array.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: June 20, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang Cheol Bong, Kyoung Tae Han
  • Patent number: 9603213
    Abstract: The described invention provides a method of and circuitry for driving three or more groups of light emitting diodes (LEDs) using time division multiplexing, whereby a periodic signal is divided among groups of LEDs, each with a different color or color temperature. The LEDs may be driven to produce colors along a desired path of values. Other qualities of light besides color or color temperature may be similarly controlled along a path of values. In some implementations, the system may receive an oscillating signal, which may be used as a periodic signal for comparison with the control signal, and one or more offset voltages, each of which may be combined with the oscillating signal to provide a second oscillating signal. The control signal may be compared to both of the oscillating signals to determine if a particular LED group may be powered.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: March 21, 2017
    Assignee: ABL IP Holding LLC
    Inventors: Benjamin Marshall Suttles, Daniel Aaron Weiss, Antonio Marques
  • Patent number: 9572225
    Abstract: Various embodiments may relate to a method for determining life expectancy information of an LED module with a plurality of LEDs. The method includes detecting of forward biases of the LED module at instants of time which lie less than 100 ms apart from each other, comparing a currently detected forward bias with one or more earlier detected forward biases, in order to detect a voltage jump which reaches a minimum initial inverse voltage within a predetermined jump duration, wherein the minimum initial inverse voltage is at least 60 mV and the predetermined jump duration is less than 100 ms long, and determining life expectancy information based on one or more detected voltage jumps.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: February 14, 2017
    Assignee: SITECO BELEUCHTUNGSTECHNIK GMBH
    Inventors: Bernhard Wuppinger, Markus Rhein, Julia Pölzl
  • Patent number: 9538598
    Abstract: An backlight adjustment circuit (20), configured to adjust luminance of light emitted by one light-emitting diode (LED) string (11) of a LED module (10), the LED string (11) includes a plurality of LEDs (D) and a current control resistor (R). The backlight adjustment circuit (20) includes a light sensing circuit (21) for sensing the luminance of one corresponding LED string (11) and producing a corresponding light sensing signal value; a comparison unit (22) for comparing the light sensing signal value with a preset reference value, and producing a first signal when comparing the light sensing signal value is less than the preset reference value, else producing a second signal; and an adjustment unit (23) for decreasing the luminance of the LED string (11) when receiving the first signal and increasing the luminance of the LED string (11) when receiving the second signal.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: January 3, 2017
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventor: Xianming Zhang
  • Patent number: 9532412
    Abstract: Disclosed is a lighting apparatus which includes LEDs and reduces flicker. The lighting apparatus may secure a charge voltage by performing a charge operation using a current corresponding to a rectified voltage equal to or more than a preset level, and compensate for the rectified voltage provided to a lighting unit including LED groups by performing a discharge operation for the charge voltage in response to the rectified voltage less than the preset level, thereby reducing flicker.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: December 27, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Geun Kim, Gyeong Sik Mun, Ki Chul An
  • Patent number: 9480111
    Abstract: The disclosure provides a driving apparatus and a method for driving a semiconductor light-emitting device assembly. The apparatus includes: a driving unit configured to drive the semiconductor light-emitting device assembly; and a cycle by cycle control unit. The cycle by cycle control unit may include: a sampling circuit configured to sample a current instantaneous value of the driving unit or the semiconductor light-emitting device assembly; and an adjusting circuit configured to adjust an output of the driving unit when the current instantaneous value sampled by the sampling circuit is larger than or equal to a preset reference value. The driving apparatus and method for driving the semiconductor light-emitting device assembly may effectively reduce an inrush current on the light-emitting devices and have a lower cost.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: October 25, 2016
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Yuanyuan Zhong, Weiqiang Zhang, Lizhi Xu
  • Patent number: 9445475
    Abstract: A light emitting diode (LED) lighting system includes a first string of first LEDs emitting light having a first color. A second string of second LEDs emits light having a second color and connected in series with the first string of first LEDs; A first switch and a second switch are connected in series. A regulator module is configured to modulate the first switch and the second switch to provide a desired current ratio. The desired current ratio corresponds to a ratio of a first current through the first string of first LEDs to a second current through the second string of second LEDs.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: September 13, 2016
    Assignee: Marvell International Ltd.
    Inventors: Sehat Sutardja, Pantas Sutardja, Wanfeng Zhang
  • Patent number: 9439254
    Abstract: The present invention relates to a device for driving LEDs and, more specifically, to an AC-direct drive-type LED driving device, capable of sequentially driving LEDs connected in series in reverse order by starting with an LED located at the end until a certain size of power is supplied, and sequentially driving the LEDs connected in series in order if the certain size of power is supplied, rather than measuring the size of a rectified power and sequentially driving the LEDs connected in series based on the measured size of the power; thereby equalizing the power consumption of all the LEDs connected in series to thereby equalize the life span of the LEDs regardless of the serial connection order of the LEDs and unifying the brightness of all the LEDs connected in series.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: September 6, 2016
    Inventor: Bong Sup Shin
  • Patent number: 9428101
    Abstract: A light emission driving device includes an output voltage supply unit arranged to generate an output voltage from an input voltage so as to supply the output voltage to a load, a determination unit arranged to determine whether or not a ground fault due to abnormality may have occurred on the basis of an anode voltage of the load, and a signal output unit arranged to externally output a signal indicating that a ground fault due to abnormality may have occurred when the determination unit determines that a ground fault due to abnormality may have occurred. The output voltage supply unit does not perform generation stop of the output voltage by a trigger of determination by the determination unit that a ground fault due to abnormality may have occurred.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: August 30, 2016
    Assignee: Rohm Co., Ltd.
    Inventors: Shinsuke Takagimoto, Yoshiyuki Nakatani, Shigenori Kawase
  • Patent number: 9433057
    Abstract: A dual color series-wired LED light string formed of a plurality of sockets, each of which receives an LED housing containing a pair of LEDs connected in anti-parallel configuration. Each LED socket includes a protective resistive component which is electrically connected across each pair of anti-parallel LEDs of the respective LED housing to protect each LED of the pair from reverse voltage breakdown damage in the event of a failure of the other LED in the housing. The protective resistive component also further serves as a shunt to electrically bypass a failed LED to keep the remaining LEDs in the light string fully illuminated.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 30, 2016
    Assignee: JLJ, Inc.
    Inventor: John L. Janning
  • Patent number: 9373284
    Abstract: A light emitting diode (LED) backlight driving circuit includes a power supply, an LED lightbar coupled to the power supply, and a constant current driving chip coupled to a control end of the power supply and coupled to a cathode of the LED lightbar. The constant current driving chip includes an adjusting dimming unit coupled to the cathode of the LED lightbar, and the adjusting dimming unit adjusts an external pulse-width modulation (PWM) dimming signal. A controllable switch unit is connected in series between an output end of the power supply and the constant current driving chip, and logical operation of the controllable switch unit is relative to logical operation of the adjusting dimming unit. The controllable switch unit turns off when the adjusting dimming unit turns off or before the adjusting dimming unit turns off, and the controllable switch unit turns on when the adjusting dimming unit turns on or after the adjusting dimming unit turns on.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 21, 2016
    Inventor: Hua Zhang
  • Patent number: 9338854
    Abstract: A universal LED tube includes a LED light bar, a power conversion apparatus, and a safety switch apparatus. The power conversion apparatus converts an external power source to provide the required power for supplying the LED light bar. The safety switch apparatus is connected to the LED light bar and the power conversion apparatus. The LED light bar is driven to emit light by the external power source after a switch module of the safety switch apparatus is certainly turned on.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: May 10, 2016
    Assignee: COOLER MASTER (HUI ZHOU) CO., LTD.
    Inventor: Qiang-Fei Duan
  • Patent number: 9307612
    Abstract: The present invention discloses a light emitting device driver circuit and a driving method of a light emitting device circuit. The light emitting device driver circuit is for driving a light emitting device circuit with plural light emitting devices connected in series. The light emitting device driver circuit determines a number of the conductive light emitting devices according to a rectified input voltage. The light emitting device driver circuit includes: a switch module, a current source circuit, and a total harmonic distortion (THD) compensation circuit. The THD compensation circuit generates an adjustment current according to the rectified input voltage. The current source circuit provides a light emitting device current to the light emitting device circuit according to the adjustment current, such that the THD is reduced.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: April 5, 2016
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Tong-Cheng Jao, Isaac Y. Chen, Yi-Wei Lee
  • Patent number: 9301356
    Abstract: A light generating device (1) is provided with at least a voltage input (21) adapted for receiving a variable voltage, at least three LED circuits (10), coupled with said voltage input (21), wherein each LED circuit (10) comprises a LED unit (14) and controllable current regulator (15) to control the current through said LED circuit (10). The light generating device (1) further comprises a controllable switch matrix (30) comprising a plurality of switches (25, 26, 27), said switch matrix (30) is configured to operate in at least three different switching modes and a controller (50), connected at least with said switch matrix (30), configured to determine said variable operating voltage and to control the switching mode of said switch matrix (30) in dependence of the determined operating voltage.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: March 29, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Christian Hattrup, Henricus Marius Joseph Maria Kahlman, Ralph Kurt, Georg Sauerländer, Bertrand Johan Edward Hontele, Haimin Tao
  • Patent number: 9301370
    Abstract: A power supply is provided. The power supply includes at least one light emission unit, a power source, an openness detection circuit, and a feedback control unit. The at least one light emission unit includes a plurality of serially connected LEDs. The power source supplies a DC voltage to the light emission unit. The openness detection circuit varies a reference potential with a voltage which is detected from both ends of at least one of the LEDs in the light emission unit. The feedback control unit regulates an output current of the power source according to the reference potential of the openness detection circuit.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: March 29, 2016
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Sung Eun Kim
  • Patent number: 9281498
    Abstract: An organic EL device that efficiently extracts light includes an organic EL element formed by laminating a first electrode layer, functional layer, and second electrode layer on a substrate and a sealing member sealing the organic EL element. The organic EL device has a first electrode communicating part electrically connected to the first electrode layer at one side of the substrate and a second electrode communicating part electrically connected to the second electrode layer at the other side of the substrate. The organic EL device has first cross grooves crossing the organic EL element from the second electrode layer located at the one side to the second electrode layer that is located at the other side. The first cross groove is formed by removing the first electrode layer, functional layer, and second electrode layer. The sealing member and the substrate are connected outside of the first cross grooves.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: March 8, 2016
    Assignee: KANEKA CORPORATION
    Inventors: Akira Nishikawa, Shigeru Ayukawa, Hideo Yamagishi
  • Patent number: 9277615
    Abstract: The purpose of the present invention is to provide an LED drive circuit that is capable of ameliorating insufficient lighting and improving power utilization efficiency.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: March 1, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Keisuke Sakai, Takashi Akiyama, Satoshi Goto, Shigehisa Watanabe, Tatsuro Yamada
  • Patent number: 9277616
    Abstract: The present invention discloses a light emitting device driver circuit. The light emitting device driver circuit drives a light emitting device circuit. The light emitting device circuit includes plural light emitting devices connected in series and a diode circuit, wherein the plural light emitting devices are divided to plural groups. The light emitting device driver circuit includes: a first switch circuit, a second switch circuit, a current source circuit, and a control circuit. The first switch circuit includes plural first switches connected in parallel to the corresponding groups respectively. The second switch circuit includes plural second switches coupled to a forward end and a reverse end of the diode circuit respectively, wherein the second switch circuit determines whether to conduct the forward end or the reverse end to the current source circuit according to the voltages of the forward end and the reverse end.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: March 1, 2016
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Tong-Cheng Jao, Isaac Y. Chen, Yi-Wei Lee
  • Patent number: 9253837
    Abstract: An LED driving apparatus controls a light emitting unit including first to k-th LED arrays, a rectifier for rectifying an AC signal, and first to (k?1)-th driving units respectively corresponding to the first to (k?1)-th LED arrays. Each driving unit includes an input terminal connected to a first terminal of the LED array, a sensing terminal connected to a second terminal of the LED array, an output terminal connected to a next driving unit, a transistor between the input terminal and the sensing terminal, and a sensing resistor between the sensing terminal and the output terminal. The rectified signal or voltage is applied to the first driving unit.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: February 2, 2016
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Seung Hun Hong
  • Patent number: 9204507
    Abstract: This LED lighting device makes a maximum current to minimum current flowing in an LED a target proportion regardless of LED driving circuit performance and without erroneous operation. An LED lighting device (1) is provided with: an LED circuit (5) that includes at least one LED (1-5); a bypass means (6a) inserted in parallel with the LEDs (1-5); and an LED driving circuit (4) that supplies current by duty control to the LEDs (1-5) and the bypass means (6a). When a prescribed minimum current flows in the LED circuit (5), the LED driving circuit (4) supplies current in which a portion of current flowing in the bypass means (6a) is added to this minimum current and carries out control of the added current by a switching element (TR1) connected in series to the LED circuit (5) and the bypass means (6a).
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 1, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shogo Fukuda, Tomoyuki Ichiza, Toshimasa Ogawa
  • Patent number: 9192026
    Abstract: Embodiments of the invention include a luminaire that includes a plurality of different light engines. Light engines having different light distributions can be included in a single luminaire and a subset of the light engines selectively driven to dynamically change the light distribution of the luminaire. In this way, a single luminaire is capable of illuminating an area with a variety of different light distributions.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 17, 2015
    Assignee: ABL IP Holding LLC
    Inventors: Craig Eugene Marquardt, Daniel Aaron Weiss, Jie Chen
  • Patent number: 9144127
    Abstract: Disclosed are novel AC-powered LED light engines for Solid State Lighting (SSL) able to achieve a high PF and a low THD without a traditional PFC. Getting rid of bulky, and costly magnetic components, short-life electrolytic capacitor, and EMI-causing fast switching, the disclosed AC-powered LED light engines ushers in a cost-effective, and energy-efficient LED driver design while eliminating the short-life electrolytic capacitor in an LED driver and reducing the Total Cost of Ownership (TOC). Thanks to no bulky components, the disclosed AC-powered LED light engines in a discrete or an integrated circuit form could be applied to the increasingly popular Driver-on-Board (DoB) design. Aside from being TRIAC-dimmable via legacy phase-cut dimmers, the disclosed LED light engines could also be made PWM-, analog-, or rheostat-dimmable with the incorporation of an appropriate dimming circuit to modulate the average LED current, adding more flexibility and versatility to dimming applications.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: September 22, 2015
    Assignee: Groups Tech Co., Ltd.
    Inventors: Ching Sheng Yu, Chih Liang Wang, Kuang Hui Chen
  • Patent number: 9131585
    Abstract: A microcomputer of a light source control device specifies an LED belonging to LEDs and subjected to a short-circuit failure based on a result of determination by a short-circuit failure detecting circuit and current amounts sensed by current sensing circuits respectively. The microcomputer makes corresponding one of switching elements interrupt supply of a current to the specified LED. The microcomputer makes a constant current circuit supply an LED not specified with a current not exceeding a current responsive to the number of such LEDs not specified.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: September 8, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Yoneoka, Yoshinori Asamura, Zenkou Yamamoto, Haruhisa Inoue