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| Number | Title | Issue Date |
| 8188680 | Illuminating device To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting module... | 05/29/2012 |
| 8188679 | Self-powered LED bypass-switch configuration A LED string is divided into segments that each have a bypass-switch and a driver for the bypass-switch. The driver is powered by a supply voltage locally generated from the forward-voltages of the LEDs of the segment. ... | 05/29/2012 |
| 8188678 | Circuit arrangement for operating at least one semiconductor light source A circuit arrangement for operating at least one semiconductor light source having an input for inputting an input voltage, an output for outputting an output voltage to the semiconductor light source, wherein the main current path of the circuit arrangement lies be... | 05/29/2012 |
| 8183795 | LED current-supplying circuit and LED current-controlling circuit A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit a... | 05/22/2012 |
| 8174210 | Illumination system with four primaries An illumination system (10), comprising:—four lamps (12A, 12B, 12C, 12D);—four lamp drivers (13A, 13B, 13C, 13D) capable of driving their corresponding lamps with respective dim factors (ξ1, ξ2,... | 05/08/2012 |
| 8174209 | DC-DC converter and method for minimizing battery peak pulse loading The invention relates to an electronic device, comprising a DC-DC converter for converting a primary supply voltage into an output voltage at an output node to be coupled to a super capacitor and a control stage for operating the regulated DC-DC converter in a forwa... | 05/08/2012 |
| 8169157 | Passive current balance driving apparatus A passive current balance driving apparatus including first and second drivers is provided. The first driver includes a first balance-capacitor having a first terminal coupled to a first terminal of an AC signal source and a second terminal providing a first balance... | 05/01/2012 |
| 8164276 | LED drive device, LED drive method and lighting system A drive circuit drives LED groups each of which has a plurality of LEDs connected in series. The drive circuit includes nMOSFETs which drive the LED groups, current regulating circuits which determine drain currents of the nMOSFETs, and subtracters which control the... | 04/24/2012 |
| 8159147 | Luminous chain with distributed driver circuit The luminous chain includes a plurality of luminous modules, wherein at least two of the luminous modules include at least one set including at least one light source and one driver circuit for driving the at least one light source, and the driver circuits of one se... | 04/17/2012 |
| 8143808 | Circuit for a motor vehicle, in particular for actuating a lighting device A circuit is provided for actuating a lighting device in a motor vehicle. The circuit includes first and second light sources, that may include one or more light-emitting diodes. The light sources are connected in parallel, and each have a respective heat sink. Meas... | 03/27/2012 |
| 8143809 | LED illuminating device A LED illuminating device includes: a power source device, a controller, an LED lighting device, and an LED unit 4 incorporating LEDs of a plurality of emission colors. The device is configured to mix the lights of the LEDs at an arbitrary proportion and set ... | 03/27/2012 |
| 8138687 | Multicolor lighting system A system for displaying multiple colors individually or in combination with one another. The system may emit red, green and blue light from light emitting diodes and may additionally provide white light to brighten the color provided by the red, green and blue light... | 03/20/2012 |
| RE43234 | Method, apparatus and system for image projection lighting A central controller and a number of image projection lighting devices (“IPLD”), a type of multiparameter light, are interconnected by an enhanced performance communications path that is capable of simultaneously carrying different digital signals on various bid... | 03/13/2012 |
| 8125162 | Current mirror circuit The present invention provides a current mirror circuit for matching current between two LEDs. The current mirror circuit includes a first sub-circuit, including a first transistor, a second transistor, and a first OPAMP, and a second sub-circuit including a third t... | 02/28/2012 |
| 8120276 | Light source emitting mixed-colored light and method for controlling the color locus of such a light source A light source (10) is disclosed, emitting multi-colored light with light of at least two different colors, emitted from a number of primary light sources (1) wherein the primary light sources (1) are divided into groups and the brightness value... | 02/21/2012 |
| 8120280 | Circuits and methods for controlling a light source A driving circuit for controlling a light source includes a frequency controller and a switch module. The frequency controller is operable for receiving a first dimming signal for controlling the light source to achieve a predetermined brightness, and for generating... | 02/21/2012 |
| 8120277 | Hybrid-control current driver for dimming and color mixing in display and illumination systems A control/driver circuit produces variable current output for a lighting system providing improved dimming and color-mixing capability by allowing digital modulation control in addition to analog control over a range of illumination intensities. The circuit and meth... | 02/21/2012 |
| 8120279 | Color adjustable lamp A color adjustable lamp may be controlled using a TRIAC dimmer circuit and includes a lamp driving circuit and two or more light sources. Each light source may output light having a different color. By setting an output intensity of each light source, light having a... | 02/21/2012 |
| 8120278 | LED driving circuit The present invention provides an LED driving circuit including: an inverter unit for switching an input power source; a plurality of transformers including a plurality of primary windings connected to the inverter unit and connected to each other in series and a pl... | 02/21/2012 |
| 8115412 | Drive device for light-emitting element A power converting unit supplies a predetermined current to each of light-emitting elements by controlling a duty ratio of a semiconductor switching element. A light-emitting-element selecting unit sequentially selects a light-emitting element to be supplied with th... | 02/14/2012 |
| 8115411 | LED lighting system A light emitting diode lighting device and system that can be used for illuminating the interior and/or exterior of vehicles, aircraft, watercraft, signage or buildings is provided. It includes a voltage feedback constant current power supply circuitry and high powe... | 02/14/2012 |
| 8111010 | Dimmable operating device having internal dimming characteristic The invention relates to an operating device (BG) for lamps (LM), comprising an interface (IFi), by means of which the device (BG) may be provided with external dimming values. The device (BG) converts said provided external dimming values into internal dimming valu... | 02/07/2012 |
| 8106602 | Backlight assembly, display apparatus having the backlight assembly and method of preventing a current controller of the backlight assembly from being shut down A backlight assembly includes a light-emitting apparatus, a multi-channel current controller and a heat distributor. The light-emitting apparatus includes a plurality of light-emitting diode (“LED”) strings. The multi-channel current controller includes a plural... | 01/31/2012 |
| 8098025 | LED flash bulb decorating light A LED flash bulb decorating light with features of able to achieve complicated light variation by employing simple circuit design, which comprises a power cord with a power plug, a series of single color, dual color or multiple color LED flash bulb forming in series... | 01/17/2012 |
| 8093832 | Backlight unit with reduced inverter noise and liquid crystal display apparatus having the same In a backlight unit and an LCD apparatus having the backlight unit, in which the backlight unit includes a plurality of lamps and an inverter, the inverter provides the lamps with current. The inverter reduces current provided to the lamps to turn off the lamps. The... | 01/10/2012 |
| 8089217 | Reconfigurable LED array and use in lighting system A light-emitting device capable of being powered by an AC power supply or an unregulated DC power supply is disclosed. The light-emitting device, in an aspect, is coupled to a controller, a light-emitting diode (“LED”) array, and a power supply, wherein the powe... | 01/03/2012 |
| 8089216 | Linearity in LED dimmer control A flyback controller may generate a switching signal for controlling the delivery of input current into a primary winding of a transformer in a flyback converter that has a secondary winding in the transformer and that is driven by AC output from a dimmer control th... | 01/03/2012 |
| 8076868 | LED driver and power control circuit with spread spectrum frequency modulation function and display panel using the same The present invention relates to an LED driver, power control circuit and display panel using the same. The LED driver has the function of spread spectrum frequency modulation (SSFM). The circuit topology of the driver includes a power converter, an error amplifier,... | 12/13/2011 |
| 8076869 | Quantum dimming via sequential stepped modulation of LED arrays In one method of and apparatus for varying the luminosity of illumination, each of a plurality of light sources has an on state in which it emits light and an off state in which it does not emit light. Each of the plurality of light sources is switched cyclically be... | 12/13/2011 |
| 8072158 | Dimming interface for power line An interface circuit for a lamp ballast includes first and second input power lines, L1 and L2, with first and second respective switches, and a neutral power line N, all coupled to a diode bridge. Closing one of the first or second input power lines L... | 12/06/2011 |
| 8067900 | Electronic device for driving LED strings The present invention relates to an electronic device for driving at least a first channel and a second channel of light emitting diodes. The electronic device includes driving means having a first and a second driving portion for driving the first and the second ch... | 11/29/2011 |
| 8067899 | Circuit arrangement and method for operating at least one first and a second lamp A circuit arrangement for operating at least one first and second lamp each provided with a first and second coil electrode includes a first and second terminal for the first coil electrode of the first lamp, a first and second terminal for the second coil electrode... | 11/29/2011 |
| 8054006 | Power supply of luminous sources A power supply of luminous sources is disclosed comprising a first circuit configured to generate a direct voltage signal from an alternating input voltage and a second circuit having in input the direct voltage signal and configured to generate an alternating volta... | 11/08/2011 |
| 8004211 | LED lighting device The present invention relates to a multiple LED driver circuit in which each LED (15, 17) is controlled by a bypass switch (19, 21). The LEDs are supplied by a switched mode power supply (8) and are connected to a constant current source to draw... | 08/23/2011 |
| 7982409 | Light sources utilizing segmented LEDs to compensate for manufacturing variations in the light output of individual segmented LEDs A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power an... | 07/19/2011 |
| 7952302 | Lighting unit, a system comprising it and a control method thereof A method for controlling the operation of a lighting unit comprising a plurality of lighting elements and a dimmable power supply unit with an output for adjusting the brightness of at least some of the lighting elements. The method provides that for at least one di... | 05/31/2011 |
| 7940014 | Apparatus for driving light emitting element Provided is an apparatus for driving a light emitting element. The apparatus includes a power unit, a light emitting element array, a constant-current circuit unit, and a voltage limiting circuit unit. The power unit supplies driving power. The light emitting elemen... | 05/10/2011 |
| 7928667 | Synchronous light emitting diode lamp string controller The present invention discloses a synchronous LED lamp string controller, comprising a clock synchronous circuit to receive a reference signal with a constant frequency, and based on which, to generate a system clock; a counter circuit to counter the system clock an... | 04/19/2011 |
| 7928668 | Lamp control system A lamp control system driving at least two discharge lamps according to at least two control instructions includes a control circuit, a switch circuit, a transformer resonance circuit, and a source transformer circuit. The control circuit generates a control signal ... | 04/19/2011 |
| 7923941 | Low cost compact size single stage high power factor circuit for discharge lamps The present application claims a compact low cost topology solution of a ballast for a discharge lamp that can provide both high power factor and low total harmonic distortion with fewer components than prior art. The topology provides the feature of a low crest fac... | 04/12/2011 |
