Plural Discharge Device Loads Patents (Class 315/324)
  • Patent number: 10278253
    Abstract: An illumination arrangement of a passenger cabin for a passenger aircraft contains a control line with a connected lamp arrangement and operating unit having operating elements for selecting light scenarios of the lamp arrangement by transmitting dedicated control signals of the operating elements from the operating unit to the lamp arrangement via the control line, the lamp arrangement has a first decoder for allocating a sequence of control signals to a prescribed one of the light scenarios, the first decoder has a decoding instruction in a menu structure, the selection of menu elements of the menu structure is effected by the control signals, the illumination arrangement contains an add-on display which is connected to the control line, the add-on display contains a second decoder with the same decoding instruction, according to which a respectively received control signal is assigned a graphic representation of the menu element that is in each case currently selected by the control signals, the graphic re
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: April 30, 2019
    Assignee: DIEHL AEROSPACE GMBH
    Inventors: Dirk-Achim Schevardo, Till Kiewning, Stefan Dobler
  • Patent number: 9317939
    Abstract: Provided are a method and device for image conversion from RGB signals to RGBW signals. The method includes the steps of converting RGB input signals as received into corresponding RGB luminance input values respectively; determining RGBW luminance output values respectively according to a position relationship between a corresponding point of the RGB luminance input values and regions divided by RGBW in a chromaticity diagram; and converting the determined RGBW luminance output values into corresponding RGBW output signals respectively and outputting the RGBW output signals.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: April 19, 2016
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Fei Yang, Zhongyuan Wu, Danna Song
  • Patent number: 9265968
    Abstract: A lighting apparatus including a plurality of luminaires, each including a controller configured to operate the luminaire and positioned in communication with a computerized device. Each luminaire is selectively operable to emit source light, characterized by a dominant source light wavelength within a range from 390 nanometers to 750 nanometers. The luminaires are arrangeable so as to form an array. Some luminaires of the plurality of luminaires are operable such that at least two of the luminaires emit source lights with different dominant source light wavelengths and the source lights emitted by the luminaires combine to form a combined light at a distance from the luminaires defined as a combining distance. The dominant source light wavelength of some of the luminaires varies with time. The luminaires are configured to be operated to selectively emit light having a spectral power distribution that reduces melatonin suppression.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: February 23, 2016
    Assignee: Biological Illumination, LLC
    Inventors: Fredric S. Maxik, David E. Bartine, Robert R. Soler, Valerie A. Bastien, James Lynn Schellack
  • Patent number: 9247604
    Abstract: A lighting device is provided with an illumination unit including two or less LED light sources. The illumination unit uses the two or less LED light sources to emit light of a short wavelength band and light of a long wavelength band. An output varying unit functions to vary an output of at least the long wavelength band light. When the output varying unit receives a varying signal, the output varying unit functions to decrease the output of at least the long wavelength band light.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: January 26, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Sayaka Nishi, Takashi Saito, Hiroki Noguchi, Naohiro Toda, Ayako Tsukitani, Kensuke Yamazoe, Toshihide Mori, Hiroshi Hamano, Kouichi Wada, Yoshinori Karasawa
  • Patent number: 9143010
    Abstract: A wireless power transmission system according to an embodiment of the present invention is a wireless power transmission system performing non-contact power transmission from a wireless power feeder selectively to a plurality of wireless power receivers, and each of the plurality of wireless power receivers comprises a power receive resonance circuit including a power receive coil and a power receive capacitor, and the wireless power feeder comprises a power feed coil and a control circuit supplying AC power to the power feed coil. The control circuit in the wireless power feeder performs power supply selectively to the plurality of wireless power receivers by changing frequency of the AC power on the basis of a magnetic field resonance effect between the power feed coil and the power receive coil.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: September 22, 2015
    Assignee: TDK CORPORATION
    Inventor: Takashi Urano
  • Patent number: 9084328
    Abstract: A lighting device comprising first and second groups of solid state light emitters, which emit light having wavelength in ranges of from 430 nm to 480 nm and from 600 nm to 630 nm, respectively, and a first group of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. If current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would, in an absence of any additional light, produce a sub-mixture of light having x, y color coordinates within an area on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38). Also provided is a method of lighting.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: July 14, 2015
    Assignee: Cree, Inc.
    Inventors: Gerald H. Negley, Antony Paul Van De Ven
  • Patent number: 8947017
    Abstract: A circuit for lighting a semiconductor light source is provided. The circuit includes: a switching regulator including a switching element and configured to generate a drive current for the semiconductor light source using the switching element; and a control circuit configured to control on-off of the switching element such that the magnitude of the drive current comes close to a targeted value. The control circuit includes: a comparator configured to compare the magnitude of the drive current with the targeted value; an up/down counter configured to count a digital value in a counting-up direction or counting-down direction, based on a comparison result of the comparator; a digital-to-analog converter configured to convert the counted digital value into an analog signal; and a drive circuit configured to control on/off of the switching element based on the analog signal.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: February 3, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Satoshi Kikuchi, Fuminori Shiotsu, Takanori Namba, Masayasu Ito
  • Patent number: 8928253
    Abstract: The invention relates to a method for generating light with a desired light color by using at least one light-emitting diode emitting red r-LED, at least one light-emitting diode emitting green g-LED, at least one light-emitting diode emitting blue b-LED and at least one light-emitting diode emitting white w-LED. In order to improve the CRI value, according to the invention it is proposed that weighting values ascertained according to the RGB algorithm and further weighting values ascertained according to the RGBW algorithm be combined together by using a correction factor.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: January 6, 2015
    Assignee: Diehl Aerospace GmbH
    Inventors: Swen Bergeler, Yvonne Bodschwinna-Kangarakis, Frank Schmid
  • Patent number: 8853971
    Abstract: Systems, interfaces, and methods for controlling a luminaire. The luminaire includes a plurality of light sources or emitters corresponding to different characteristics of light. Color controls corresponding to pre-defined characteristics are set or modified by one or more dials, faders, or similar interface devices. Each of the color controls correspondingly controls the output of one or more of the light sources. A separation between the preset characteristic for each color control and the actual characteristic of each light source is calculated. An output value for each light source that is required to generate the selected characteristic is then calculated and stored in memory. When one or more color controls are selected, the output values of each light source required to reproduce the desired characteristic is determined, and the light sources in the luminaire are driven at the corresponding output values.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: October 7, 2014
    Assignee: Electronic Theatre Controls, Inc.
    Inventor: Adam Bennette
  • Patent number: 8786207
    Abstract: A light-emitting diode with adjustable light beams and a method for controlling the same. The light-emitting diode includes a substrate, multiple dies on the substrate, a primary optical lens over the substrate, wherein a portion of the dies being designated as belonging to a first group of dies and another portion of the dies being designated as belonging to a second group of dies, the primary optical lens covers the dies, and a controlling unit selectively drives the first or the second group to emit light, wherein a light beam formed by light that is emitted by the first group and passes through the primary optical lens has a different shape or projection angle from a light beam formed by light that is emitted by the second group and passes through the primary optical lens.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: July 22, 2014
    Assignee: AV Tech Corporation
    Inventors: Chun-Ru Huang, Chien-Yueh Chen
  • Patent number: 8618885
    Abstract: Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: December 31, 2013
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Lieyi Fang
  • Patent number: 8558478
    Abstract: A hybrid lamp apparatus is presented having a primary lamp circuit with a CFL and an electronic ballast, as well as a Halogen or incandescent secondary lamp circuit with a control circuit that shuts off the secondary lamp a time period after powerup, where the secondary lamp time period varies according to the amount of time the apparatus was previously unpowered.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 15, 2013
    Assignee: General Electric Company
    Inventors: Qian Ni, Devin Sun, Peter Lucz, Balazs Torok
  • Patent number: 8519643
    Abstract: A ballast for fluorescent tubes and the use thereof for producing fluorescent tube lighting fixtures using a novel gas excitation mode in which light is generated by means of controlled pulses leading to an increased power efficiency, with a data collection and transmission functionality, are disclosed.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: August 27, 2013
    Inventors: Gilles Darras, Pascal Maillach
  • Patent number: 8384312
    Abstract: A power distribution system for applying electric power to a plurality of lighting units is provided. The power distribution system includes at least one user interface having a first pairing setting unit, a plurality of second pairing setting units, and a power line. The user interface is electrically connected with a power source. Each of the second pairing setting units is electrically connected with one of the lighting units, respectively. The power line connected with the lighting units is electrically connected between the first pairing setting unit and the second pairing setting units. Each of the second pairing setting units is capable of receiving an electrical signal output by the first pairing setting unit and determining whether the lighting unit controlled thereby is turned on or not. Therefore, each of the second pairing setting units connected with the same power line can be controlled individually.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: February 26, 2013
    Assignee: GE Investment Co., Ltd.
    Inventor: Wen-Kuei Tsai
  • Patent number: 8378596
    Abstract: This invention relates to assemblies used as night lights and contains certain embodiments that improve, add features, and/or lower the cost of the type of momentary night light defined by U.S. Pat. No. 7,253,570. The words ‘momentary night light assembly’ as used in this invention means a light that remains lit for only a short fixed period of time following a transition from light to dark of the local ambient light. It then turns itself off after a short time period until another light to dark transition occurs. The words ‘night light’ as used herein means a light that remains on while the local ambient light is dark following a light to dark transition.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: February 19, 2013
    Inventor: John Alfred Ayres
  • Patent number: 8373352
    Abstract: An electrodeless plasma lamp array structure uses multiple plasma lamps to produce large amounts of electromagnetic radiation (visible, IR, UV, or a combination of visible, IR, and UV). An M by N array configuration is powered by either a single RF power source or multiple RF power sources. The array incorporates controllers to adjust the power delivered from the RF power source to each lamp within the array. By adjusting the delivered RF power, the intensity of electromagnetic radiation that is emitted from each lamp is controlled independently allowing for the creation of an array of lamps that emit electromagnetic radiation of varying intensity levels at different places within the array. Using lamps with different color temperatures as part of the array allows the color temperature and the color rendering index of the illumination to achieve different lighting conditions.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: February 12, 2013
    Assignee: Topanga Technologies, Inc.
    Inventors: Douglas A. Doughty, Mehran Matloubian, Frederick M. Espiau
  • Publication number: 20130027675
    Abstract: The present invention includes light valve section (10) having a plurality of shutter mechanisms (14) that switch between a transmitting state and a shading state of light emitted from light emitting element (25); and substrate (16) through which light that exits plurality of shutter mechanisms (14) is transmitted. The display element also has plasmon coupling section (11) that causes plasmon coupling to occur with light that exits the light valve section (10). Plasmon coupling section (11) includes carrier generation layer (17) that generates carriers with incident light that exits light valve section (10), plasmon excitation layer (19) that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer (17) excited with the light emitted from light emitting element (25), and wave number vector conversion layer (22) that converts the light or surface plasmons generated in plasmon excitation layer (19) into light having a predetermined exit angle.
    Type: Application
    Filed: May 13, 2011
    Publication date: January 31, 2013
    Applicant: NEC CORPORATION
    Inventors: Masanao Natsumeda, Masao Imai, Goroh Saitoh, Shin Tominaga
  • Patent number: 8362715
    Abstract: This invention relates to a lighting system. The lighting system includes a plurality of interconnectable polygonal lighting modules, wherein each lighting module has a plurality of connection members each including at least one electrical terminal. The connection members are arranged rotationally symmetrically at the lighting module. The lighting system further includes bridge members. Each bridge member has bridge terminals and is mountable at neighboring connection members of different lighting modules, to form a bridge providing an electric connection between connection terminals of the different connection members.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: January 29, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Pieter Jacobus Snijder, Martin Gerard Hendrik Hiddink, Pieter Hubertus Franciscus Deurenberg, Johannes Martinus Maria Welschen, Victor J. Zwanenberg
  • Patent number: 8354803
    Abstract: A hybrid light source comprises a discrete-spectrum lamp (for example, a fluorescent lamp) and a continuous-spectrum lamp (for example, a halogen lamp). A control circuit individually controls the amount of power delivered to the discrete-spectrum lamp and the continuous-spectrum lamp in response to a phase-controlled voltage generated by a connected dimmer switch, such that a total light output of the hybrid light source ranges throughout a dimming range. The continuous-spectrum lamp is driven by a continuous-spectrum lamp drive circuit, which is operable to conduct a charging current of a power supply of the dimmer switch and to provide a path for enough current to flow through the hybrid light source, such that the magnitude of the current exceeds rated latching and holding currents of a thyristor of the dimmer.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: January 15, 2013
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Robert C. Newman, Jr., Keith Joseph Corrigan, Aaron Dobbins, Mehmet Ozbek, Mark Taipale, Joel S. Spira
  • Patent number: 8339048
    Abstract: A hybrid light source comprises a discrete-spectrum lamp (for example, a fluorescent lamp) and a continuous-spectrum lamp (for example, a halogen lamp). A control circuit individually controls the amount of power delivered to the discrete-spectrum lamp and the continuous-spectrum lamp in response to a phase-controlled voltage generated by a connected dimmer switch, such that a total light output of the hybrid light source ranges throughout a dimming range. The discrete-spectrum lamp is turned off and the continuous-spectrum lamp produces all of the total light intensity of the hybrid light source when the total light intensity is below a transition intensity.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: December 25, 2012
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Robert C. Newman, Jr., Keith Joseph Corrigan, Aaron Dobbins, Mehmet Ozbek, Mark S. Taipale, Joel S. Spira
  • Patent number: 8324836
    Abstract: A lighting device includes a first lighting source, a second lighting source, and a controller. The first lighting source yields a first illumination pattern. The second lighting source yields a second illumination pattern. The patterns overlay to yield a third illumination pattern. The controller shifts available power between the first lighting source and the second lighting source.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: December 4, 2012
    Assignee: Eveready Battery Company, Inc.
    Inventors: John D. Crawford, David A. Spartano, Peter F. Hoffman
  • Patent number: 8310437
    Abstract: The backlight device includes: a backlight including a plurality of light sources; and a backlight control part. The backlight includes a plurality of divided areas, and light sources disposed in each of the plurality of divided areas are chain-connected. The backlight control part includes at least one backlight control unit for controlling turning on and off of the backlight which includes the plurality of divided areas, with respect to the each divided area. The backlight control unit includes a selection unit for selecting one of divided areas, at least one backlight drive path. The selection unit selects the one of divided areas in a time division manner, and the light sources of the one of divided areas are driven by sharing the at least one backlight drive path in common.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Junichi Maruyama, Koji Hosogi, Yoshihisa Ooishi, Misa Owa, Kikuo Ono
  • Patent number: 8305002
    Abstract: A lighting system comprising a first plurality of fluorescent lamps (17) constituted by a first and a second lamp (20, 21) having a first common terminal (18) which is connected via a first capacitor (22) to a first terminal (12) of a voltage source (11). The system further comprises a second plurality of fluorescent lamps (29) constituted by a third and a fourth lamp (32, 33) having a first common terminal (30) which is connected via a second capacitor (34) to the first terminal (12) of a voltage source (11). The second terminals of the first lamp (20) and third lamp (32) are connected to a first terminal (24) of a third capacitor (25), said third capacitor (25) being connected with its second terminal to the second terminal (13) of the voltage source (11). The second terminals of the second lamp (21) and fourth lamp (33) are connected to a first terminal (36) of a fourth capacitor (37), the fourth capacitor (37) being connected with its second terminal to the second terminal (13) of the voltage source (11).
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: November 6, 2012
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Jean-Paul Louvel
  • Patent number: 8288960
    Abstract: A two-terminal current controller regulates a first current flowing through a load, which is coupled in parallel with the two-terminal current controller, according to a voltage established across the two-terminal current controller. When the voltage established across the two-terminal current controller does not exceed a first voltage, the two-terminal current controller conducts a second current related to a rectified AC voltage, thereby limiting the first current to zero and regulating the second current according to the load voltage. When the voltage established across the two-terminal current controller is between the first voltage and a second voltage, the two-terminal current controller conducts the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the voltage established across the two-terminal current controller is greater than second voltage, the two-terminal current controller is turned off.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: October 16, 2012
    Assignee: IML International
    Inventors: Yung-Hsin Chiang, Yi-Mei Li
  • Publication number: 20120249016
    Abstract: Embodiments of the invention comprise a base and a light emitting diode (LED) power supply (PS) detachably connectable to the base module. The LED PS provides current and voltage to at least one LED lamp in a lighting fixture. The base optionally includes electrical connections for detachable connection of a ballast and further includes electrical connections to mains electrical power. An embodiment may further include the ballast. The LED PS, base, and ballast implement a common electrical and mechanical interface for enabling replacement of fluorescent lamps in lighting fixtures with LED lamps. A lamp including a base is included in some embodiments of the invention.
    Type: Application
    Filed: March 12, 2012
    Publication date: October 4, 2012
    Inventor: Toby Smith
  • Publication number: 20120194084
    Abstract: In various embodiments, a method for operating high-pressure discharge lamps, in which high-pressure discharge lamps are operated at the same time in a different thermodynamic state, so that one high-pressure discharge lamp having an emission line emits at a spectral position and at the same time a different high-pressure discharge lamp having an absorption line emits light at the same spectral position, wherein at least some of the light emitted by each high-pressure discharge lamp is converged in a local area.
    Type: Application
    Filed: August 25, 2010
    Publication date: August 2, 2012
    Applicant: OSRAM AG
    Inventor: Ulrich Hartwig
  • Patent number: 8228002
    Abstract: A hybrid light source comprises a discrete-spectrum lamp (for example, a fluorescent lamp) and a continuous-spectrum lamp (for example, a halogen lamp). A control circuit individually controls the amount of power delivered to the discrete-spectrum lamp and the continuous-spectrum lamp in response to a phase-controlled voltage generated by a connected dimmer switch, such that a total light output of the hybrid light source ranges throughout a dimming range. The discrete-spectrum lamp is turned off and the continuous-spectrum lamp produces all of the total light intensity of the hybrid light source when the total light intensity is below a transition intensity.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: July 24, 2012
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Robert C. Newman, Jr., Keith Joseph Corrigan, Aaron Dobbins, Mehmet Ozbek, Mark S. Taipale, Joel S. Spira
  • Publication number: 20120161631
    Abstract: A plasma light source system includes a plurality of plasma light source 10 that periodically emits plasma light 8 from respective predetermined light emitting points 1a and a light collecting device 40 that collects the plasma light emitted from the plurality of light emitting points of the plasma light sources to a single light collecting point 9.
    Type: Application
    Filed: August 25, 2010
    Publication date: June 28, 2012
    Applicant: IHI CORPORATION
    Inventor: Hajime Kuwabara
  • Patent number: 8159153
    Abstract: A compound light source that compensates for changes in electrical conversion efficiency with increasing operating temperature is disclosed. The compound light source generates light of a design intensity at a design temperature in response to a drive current flowing through the light source. The light source includes a primary light source and a compensating light source. The primary and compensating light sources convert an electrical current passing therethrough to light, each light source being characterized by an electrical conversion efficiency that decreases with increasing temperature and that also decreases with increasing current. The compound light source includes a temperature sensor that measures the temperature of the primary light source and a current splitting circuit that divides the drive current between the primary and compensating light sources to compensate for the decrease in efficiency of the primary light source with temperature above the design temperature.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: April 17, 2012
    Assignee: Bridgelux, Inc.
    Inventor: David Hum
  • Patent number: 8148911
    Abstract: The present invention relates to a current-balance circuit and a backlight module having the same. The current balance circuit includes a current balance unit, a control unit, and a detection unit. The current balance unit is connected to a plurality of light units to regulate the current of the plurality of light units, independent from the effects of input voltage. The detection unit is connected to the plurality of light units and the current balance unit to detect the minimum operating voltage for the plurality of light units. The control unit, connected to the current balance unit, controls the operation of the plurality of light units.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 3, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ke-Horng Chen, Chia-Lin Chiu, Ling Li, Chia-Lin Liu, Chi-Neng Mo
  • Patent number: 8111022
    Abstract: This invention relates to a lighting system. The lighting system includes a plurality of interconnectable polygonal lighting modules, wherein each lighting module has a plurality of connection members each including at least one electrical terminal. The connection members are arranged rotationally symmetrically at the lighting module. The lighting system further includes bridge members. Each bridge member has bridge terminals and is mountable at neighboring connection members of different lighting modules, to form a bridge providing an electric connection between connection terminals of the different connection members.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: February 7, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Pieter Jacob Snijder, Martin Gerard Hendrik Hiddink, Pieter Hubertus Franciscus Deurenberg, Johannes Martinus Maria Welschen, Victor J. Zwanenberg
  • Patent number: 8084948
    Abstract: A method for dimming an illumination system (20) capable of emitting light (L) with a variable color is described. The illumination system (20) comprises three dimmable light sources (21, 22, 23) generating respective lights (L1, L2, L3) having respective, mutually different colors (C1, C2, C3). The method comprises the step of reducing the light intensities (I1, I2, I3) of the three dimmable light sources (21, 22, 23) while maintaining the color point until one of said light sources (21) reaches a lower dim limit (IMIN)—The method further comprises the step of maintaining the light intensity (I1) of said one light source (21) at its lower dim limit (IMIN) and reducing the light intensities (I2, I3) of the two other dimmable light sources (22, 23) in such a manner that the hue is maintained.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: December 27, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Geert Willem Van Der Veen, Wijnand Johannes Rietman
  • Patent number: 8080941
    Abstract: The cold cathode lamp includes a light-transmissive insulating tube; the first and second internal electrodes disposed inside the insulating tube; the first and second external electrodes disposed outside the insulating tube and connected to the first and second internal electrodes, respectively; the first and second insulating members covering the first and second external electrodes, respectively; the first opposite electrode opposite the first external electrode with the first insulating member interposed therebetween, the second opposite electrode opposite the second external electrode with the second insulating member interposed therebetween, the first insulating layer covering the outer edges of the first opposite electrode; and the second insulating layer covering the outer edges of the second opposite electrode. It is possible to light up a plurality of cold cathode lamps that are connected in parallel to a power supply.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: December 20, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshiki Takata
  • Patent number: 8076859
    Abstract: An emergency sign power supply with battery charger is provided. In some embodiments the battery charging circuit is formed by a single diode and a single resistor.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: December 13, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: David W. Knoble, Khosrow Jamasbi
  • Patent number: 8058806
    Abstract: A handheld fluorescent task lamp comprising a housing assembly having a housing and a tubular lens body enclosing compact fluorescent bulbs, an elongated spine configured for slidingly supporting the lens body, and a resilient bulkhead for cushioning the compact fluorescent bulbs in the lens body; an electronic ballast circuit within the housing comprising a power supply, a self-starting electronic driver circuit operable to start and run at least first and second CFL bulbs; a bulb accommodation circuit that enables operation of the electronic ballast circuit with either starter type or non-starter type and regardless whether one or both CFL bulbs are connected to the driver circuit; and an illumination assembly, wherein the CFL bulbs are oriented with respect to each other such that an enhanced forward emission field is provided.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: November 15, 2011
    Assignee: Bayco Products, Ltd.
    Inventors: Bijan Bayat, James Newton, Max Alan Probasco
  • Patent number: 8044610
    Abstract: A method is provided for driving a plurality of light emitters in a plurality of output paths with each output path including at least one light emitter. The method includes the steps of applying a supply voltage level to a plurality of output paths; generating a current for each path during a period of a predetermined length for the output path; sensing a current level for each output path during the period; comparing each sensed current level with a reference level; increasing the supply voltage level if the sensed current level is lower than the reference level; determining a lowest supply voltage level for the worst case output path; and using the lower supply voltage level as a common supply voltage level for all output paths.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 25, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Harald Sandner, Christophe Vaucourt, Hans Schmeller, Martin Rommel, Helmut Kiml
  • Patent number: 8030859
    Abstract: A cold cathode lamp includes a light-transmitting insulating tube, first and second internal electrodes arranged inside the insulating tube, first and second external electrodes arranged outside the insulating tube and respectively connected with the first and second internal electrodes, first and second insulating bodies respectively covering the first and second external electrodes, a first counter electrode arranged opposite to the first external electrode via the first insulating body, and a second counter electrode arranged opposite to the second external electrode via the second insulating body. The first (second) counter electrode has a portion which does not face the first (second) external electrode, and the space between this portion and the insulating tube is filled with the first (second) insulating body. A plurality of such cold cathode lamps can be lit by being connected in parallel with a power supply.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: October 4, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshiki Takata
  • Patent number: 8008866
    Abstract: A hybrid light source comprises a high-efficiency lamp, for example, a fluorescent lamp, and a low-efficiency lamp, for example, a halogen lamp. A control circuit individually controls the amount of power delivered to each of the high-efficiency lamp and the low-efficiency lamp, such that a total light output of the hybrid light source ranges throughout a dimming range from a minimum total intensity to a maximum total intensity. The high-efficiency lamp is turned off and the low-efficiency lamp produces all of the total light intensity of the hybrid light source when the total light intensity is below a transition intensity. The low-efficiency lamp is controlled such that the correlated color temperature of the hybrid light source decreases as the total light intensity is decreased below the transition intensity. The hybrid light source is characterized by a low impedance throughout the dimming range.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: August 30, 2011
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Robert C. Newman, Jr., Keith Joseph Corrigan, Aaron Dobbins, Mehmet Ozbek, Mark S. Taipale, Joel S. Spira
  • Patent number: 7995952
    Abstract: In accordance with the invention, there are electron emitters, charging devices, and methods of forming them. An electron emitter array can include a plurality of nanostructures, each of the plurality of nanostructures can include a first end and a second end, wherein the first end can be connected to a first electrode and the second end can be positioned to emit electrons, and wherein each of the plurality of nanostructures can be formed of one or more of oxidation resistant metals, doped metals, metal alloys, metal oxides, doped metal oxides, and ceramics. The electron emitter array can also include a second electrode in close proximity to the first electrode, wherein one or more of the plurality of nanostructures can emit electrons in a gas upon application of an electric field between the first electrode and the second electrode.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: August 9, 2011
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Fa-Gung Fan, Joseph A. Swift, Dan A. Hays, Michael F. Zona
  • Publication number: 20110163697
    Abstract: The invention provides an illuminating device suitable for illuminating a cabin of an aircraft. An OLED illuminating panel 100 is arranged on a ceiling of the cabin of an aircraft in a direction parallel to an axis line of the fuselage to illuminate the interior of the cabin. Further, the OLED illuminating panel is arranged on an upper portion of the window panels in a direction parallel to the axis line of the fuselage to illuminate the interior of the cabin. A control system for controlling the illumination within the cabin includes a central control unit and OLED illuminating panels 100 disposed above window panels and divided into multiple zones within the cabin, which is connected to the central control unit via power/signal lines, wherein the central control unit has a function to change and control the color of the OLED illuminating panels 100 of the respective zones.
    Type: Application
    Filed: November 5, 2010
    Publication date: July 7, 2011
    Applicant: JAMCO CORPORATION
    Inventors: Mineo Mizukami, Hiroyuki Hozumi, Jun Shiomori
  • Patent number: 7944314
    Abstract: Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: May 17, 2011
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Lieyi Fang
  • Patent number: 7902767
    Abstract: An AC inverter circuit supplies power to multiple lamps in an LCD backlight. Conventional AC power is used as direct input into a full wave rectifier that converts the input from AC to a DC reference voltage. A transformer driver, including a chopper, converts the DC reference voltage to a higher voltage AC which drives a step up transformer to produce a voltage sufficient to drive as many as six fluorescent lamps. The components/circuitry associated with the transformer's primary windings is optically isolated from the rest of the circuit.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: March 8, 2011
    Assignee: Westinghouse Digital, LLC
    Inventors: Hing S. Tong, Shikuang Tan
  • Patent number: 7888883
    Abstract: A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The at least one lighting device includes at least one lighting source, and an internal power source applying a first electrical current to illuminate the at least one lighting element, wherein the internal power source supplies the first electrical current. The at least one connector electrically connects to the at least one lighting device. The plurality of external power sources include at least first and second external power sources that are adapted to be electrically connected to the at least one lighting device by the at least one connector.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: February 15, 2011
    Assignee: Eveready Battery Company, Inc.
    Inventors: John D. Crawford, David A. Spartano, Peter F. Hoffman
  • Patent number: 7839094
    Abstract: A lighting ballast (10) includes an inverter portion (12) and a resonant portion (14). During a preheat phase, a filament transformer (110) supplies preheat glow currents to lamp cathodes. Also during the preheat phase, the filament transformer boosts the oscillation frequency of the inverter portion (12) to a frequency above a resonant frequency of the resonant portion (14). Once the lamp cathodes are sufficiently heated, the filament transformer (110) is removed from the circuit and the inverter (12) is allowed to start oscillating. A feedback network (150) monitors a high frequency bus (26) and provides input to a shunt regulator (170). The shunt regulator drives the gate of a switch (128) of a bias network (126) and adds or removes the filament transformer (110) to the circuit depending on the conductive state of the switch (128).
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: November 23, 2010
    Assignee: General Electric Company
    Inventor: Louis R. Nerone
  • Patent number: 7830099
    Abstract: A system for driving a plurality of lamps comprises a lamp module, an inverter circuit providing currents to the lamp module, an interface for conveying the currents, a splitter, a balance unit, and a fault detecting circuit. The splitter receives the currents provided by the inverter circuit through the interface and distributing the currents to the plurality of lamps. The balance unit balances the currents provided to the plurality of lamps in the lamp module. The fault detecting circuit detects and reports a condition of at least one of the lamps by detecting signals generated from the inverter circuit. The fault detecting circuit receives the signal from a point in the system, such that the fault detecting circuit can detects the signals before the signal undergoes the distributing by the splitter.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: November 9, 2010
    Assignees: Ampower Technology Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chih-Chan Ger, Chi-Chang Lu, Chia-Kun Chen
  • Publication number: 20100225253
    Abstract: A cold cathode lamp includes a light-transmitting insulating tube, first and second internal electrodes arranged inside the insulating tube, first and second external electrodes arranged outside the insulating tube and respectively connected with the first and second internal electrodes, first and second insulating bodies respectively covering the first and second external electrodes, a first counter electrode arranged opposite to the first external electrode via the first insulating body, and a second counter electrode arranged opposite to the second external electrode via the second insulating body. The first (second) counter electrode has a portion which does not face the first (second) external electrode, and the space between this portion and the insulating tube is filled with the first (second) insulating body. A plurality of such cold cathode lamps can be lit by being connected in parallel with a power supply.
    Type: Application
    Filed: November 27, 2006
    Publication date: September 9, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yoshiki Takata
  • Publication number: 20100225254
    Abstract: The cold cathode lamp includes a light-transmissive insulating tube; the first and second internal electrodes disposed inside the insulating tube; the first and second external electrodes disposed outside the insulating tube and connected to the first and second internal electrodes, respectively; the first and second insulating members covering the first and second external electrodes, respectively; the first opposite electrode opposite the first external electrode with the first insulating member interposed therebetween, the second opposite electrode opposite the second external electrode with the second insulating member interposed therebetween, the first insulating layer covering the outer edges of the first opposite electrode; and the second insulating layer covering the outer edges of the second opposite electrode. It is possible to light up a plurality of cold cathode lamps that are connected in parallel to a power supply.
    Type: Application
    Filed: November 27, 2006
    Publication date: September 9, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yoshiki Takata
  • Patent number: 7755299
    Abstract: The invention relates to a transformer (10) for balancing the current in an AC circuit, comprising a primary winding (12), a secondary winding (14) and a main inductance (16). The transformer is characterized in that a capacitive component is connected in parallel to the primary winding (12) or to the secondary winding (14), whose capacitance value is determined such that the reactive current IL brought about by the main inductance (16) is substantially compensated. A transformer of this kind can preferably be employed in current balancing circuits as used, for example, in systems for backlighting LCD displays.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: July 13, 2010
    Assignee: Minebea Co., Ltd.
    Inventor: Robert Weger
  • Patent number: 7733033
    Abstract: In a lighting unit for operating lamps (LA1, LA2) of a different color temperature, a number of predetermined color points can be adjusted. The color points are chosen so that the color difference calculated in the CIELAB space is the same for subsequent adjustable color points.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: June 8, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Hans Baaijens, Willem Potze, David Copplestone Payne, Paul Philip Thursfield
  • Patent number: 7719211
    Abstract: A method according to one embodiment may include generating AC voltage and current and a striking voltage. The method of this embodiment may also include generating striking voltage and steady-state voltage for at least two lamp loads. The method of this embodiment may also include coupling at least two lamp loads in parallel. The method of this embodiment may also include coupling current balancing circuitry to the at least two lamp loads and providing, by the current balancing circuitry simultaneous striking voltage to the at least two lamps loads. The method of this embodiment may also include balancing, by the current balancing circuitry, AC current through the at least two lamp loads. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: May 18, 2010
    Assignee: O2Micro International Limited
    Inventors: Ching Chuan Kuo, Houng Kuo Hsu