Patents Assigned to Light-Based Technologies Incorporated
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Patent number: 8598804Abstract: An illumination apparatus comprises a plurality of LEDs and a control system connected to receive dimmer-modulated AC line voltage and control the LEDs. The control system is configured to operate in a plurality of different modes wherein changes in dimmer-modulated AC line voltage adjust various characteristic of the LEDs.Type: GrantFiled: April 25, 2011Date of Patent: December 3, 2013Assignee: Light-Based Technologies IncorporatedInventors: Thomas George Foxall, Miroslaw Marek Grotkowski, Stephen Christian Wilson, Tom William Thornton, Brent York
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Patent number: 8598737Abstract: A method for powering one or more loads from a varying input voltage comprises controlling a primary switch to selectively apply the input voltage to energize an inductor, controlling a load switch to selectively connect the inductor to the load, monitoring one or more load parameters to determine load conditions, and, when the load conditions meet a load requirement, disconnecting the load from the inductor and directing any remaining current in the inductor to a energy storage element.Type: GrantFiled: September 9, 2011Date of Patent: December 3, 2013Assignee: Light-Based Technologies IncorporatedInventors: Thomas George Foxall, Gregory Bernard Sheehan
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Patent number: 8547264Abstract: The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the multi-channel analog output signals. A single-channel to multi-channel analog-to-analog converter is provided to convert the single analog input signal to multiple output channels. Uni-directional coupling is used for coupling and mixing the multi-channel outputs and transferring the mixed outputs to a data bus. Signals on the data bus are used to drive the multiple peripheral devices.Type: GrantFiled: June 30, 2011Date of Patent: October 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Verne S. Jackson, Jeanette Elisabeth Jackson
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Patent number: 8547263Abstract: The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the multi-channel analog output signals. A single-channel to multi-channel analog-to-analog converter is provided to convert the single analog input signal to multiple output channels. Uni-directional coupling is used for coupling and mixing the multi-channel outputs and transferring the mixed outputs to a data bus. Signals on the data bus are used to drive the multiple peripheral devices.Type: GrantFiled: June 30, 2011Date of Patent: October 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Verne S. Jackson, Jeanette Elisabeth Jackson
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Patent number: 8547262Abstract: The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the multi-channel analog output signals. A single-channel to multi-channel analog-to-analog converter is provided to convert the single analog input signal to multiple output channels. Uni-directional coupling is used for coupling and mixing the multi-channel outputs and transferring the mixed outputs to a data bus. Signals on the data bus are used to drive the multiple peripheral devices.Type: GrantFiled: June 30, 2011Date of Patent: October 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Verne S. Jackson, Jeanette Elisabeth Jackson
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Patent number: 8547024Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.Type: GrantFiled: December 5, 2012Date of Patent: October 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Miroslaw Marek Grotkowski, Gregory Bernhard Sheehan
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Patent number: 8546974Abstract: A method for powering one or more loads from a varying input voltage comprises controlling a primary switch to selectively apply the input voltage to energize an inductor, controlling a load switch to selectively connect the inductor to the load, monitoring one or more load parameters to determine load conditions, and, when the load conditions meet a load requirement, disconnecting the load from the inductor and directing any remaining current in the inductor to a energy storage element.Type: GrantFiled: July 27, 2012Date of Patent: October 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Thomas George Foxall, Gregory Bernard Sheehan
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Patent number: 8530883Abstract: Light emitting devices comprise excitation sources arranged to excite quantum dots which fluoresce to emit light. In an embodiment, a device is manufactured by a process which involves applying an acoustic field is applied to a fluid containing quantum dots, to cause the quantum dots to accumulate at locations which are adjacent to excitation sources, and then initiating a phase transition of the fluid to trap the quantum dots in the locations adjacent to the excitation sources. The quantum dots are illuminated during the process and the resulting fluorescence is optically monitored to provide indicators of quantum dot distribution in the fluid. These indicators are used as feedback for controlling aspects of the process, such as initiating the phase transition.Type: GrantFiled: March 10, 2011Date of Patent: September 10, 2013Assignee: Light-Based Technologies IncorporatedInventors: Yohann Sulaiman, Richard MacKellar, Allan Brent York
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Patent number: 8482221Abstract: Driving circuits are provided that compensate for devices having characteristics that change with age. A correction circuit has a reference device having an output that changes with age in a known manner over a time span similar to the expected lifetime of the driven device. The output of reference device provides an indication of the current age of driven device.Type: GrantFiled: November 21, 2012Date of Patent: July 9, 2013Assignee: Light-Based Technologies IncorporatedInventors: Yohann Sulaiman, Milen Moussakov, Jeanette Jackson
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Patent number: 8441202Abstract: An illumination apparatus comprises a plurality of LEDs and a control system connected to receive dimmer-modulated AC line voltage and control the LEDs. The control system is configured to operate in a plurality of different modes wherein changes in dimmer-modulated AC line voltage adjust various characteristic of the LEDs.Type: GrantFiled: May 21, 2010Date of Patent: May 14, 2013Assignee: Light-Based Technologies IncorporatedInventors: Stephen Christian Wilson, Tom William Thornton, Thomas George Foxall, Miroslaw Marek Grotkowski
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Publication number: 20130113395Abstract: Driving circuits are provided that compensate for devices having characteristics that change with age. A correction circuit has a reference device having an output that changes with age in a known manner over a time span similar to the expected lifetime of the driven device. The output of reference device provides an indication of the current age of driven device.Type: ApplicationFiled: November 21, 2012Publication date: May 9, 2013Applicant: LIGHT-BASED TECHNOLOGIES INCORPORATEDInventor: Light-Based Technologies Incorporated
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Publication number: 20130093345Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.Type: ApplicationFiled: December 5, 2012Publication date: April 18, 2013Applicant: LIGHT-BASED TECHNOLOGIES INCORPORATEDInventor: LIGHT-BASED TECHNOLOGIES INCORPORATE
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Patent number: 8350495Abstract: Driving circuits are provided that compensate for devices having characteristics that change with age. A correction circuit has a reference device having an output that changes with age in a known manner over a time span similar to the expected lifetime of the driven device. The output of reference device provides an indication of the current age of driven device.Type: GrantFiled: March 22, 2010Date of Patent: January 8, 2013Assignee: Light-Based Technologies IncorporatedInventors: Yohann Sulaiman, Milen Moussakov, Jeanette Jackson
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Patent number: 8344630Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.Type: GrantFiled: May 28, 2012Date of Patent: January 1, 2013Assignee: Light-Based Technologies IncorporatedInventors: Miroslaw Marek Grotkowski, Gregory Bernard Sheehan
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Patent number: 8339066Abstract: Holding current circuits in light sources controlled by a dimmer are operated in a coordinated manner to maintain proper operation of the dimmer without wasting energy. A plurality of light sources each including a separate holding current circuit may be controlled by a dimmer. The holding current units are selectively disabled and/or a maximum holding current drawn by the holding current units are selectively adjusted to maintain a desired current draw.Type: GrantFiled: March 25, 2011Date of Patent: December 25, 2012Assignee: Light-Based Technologies IncorporatedInventors: Tom William Thornton, Milen Moussakov, Gregory Bernard Sheehan
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Publication number: 20120292995Abstract: A method for powering one or more loads from a varying input voltage comprises controlling a primary switch to selectively apply the input voltage to energize an inductor, controlling a load switch to selectively connect the inductor to the load, monitoring one or more load parameters to determine load conditions, and, when the load conditions meet a load requirement, disconnecting the load from the inductor and directing any remaining current in the inductor to a energy storage element.Type: ApplicationFiled: July 27, 2012Publication date: November 22, 2012Applicant: Light-Based Technologies IncorporatedInventors: Thomas George Foxall, Gregory Bernard Sheehan
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Publication number: 20120235588Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.Type: ApplicationFiled: May 28, 2012Publication date: September 20, 2012Applicant: LIGHT-BASED TECHNOLOGIES INCORPORATEDInventors: Miroslaw Marek Grotkowski, Gregory Bernard Sheehan
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Patent number: 8203277Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.Type: GrantFiled: October 26, 2010Date of Patent: June 19, 2012Assignee: Light-Based Technologies IncorporatedInventors: Miroslaw Marek Grotkowski, Gregory Bernard Sheehan
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Publication number: 20120098454Abstract: Apparatus for maintaining at least a holding current in a leading-edge phase-cut dimmer during a period of transient voltage variations, the apparatus connectable to the dimmer and connectable to a load connected to draw current from the dimmer. The apparatus may comprise an edge detector connected to receive a voltage from the dimmer and generate a leading-edge signal in response to a leading-edge of a phase-cut waveform, and a current offset circuit connected to receive the leading-edge signal and draw a supplementary offset current in response to the leading-edge signal, wherein the supplementary offset current is sufficient to maintain at least a holding current in the dimmer during the period of transient voltage variations. The current offset circuit may comprise a holding current circuit which also draws supplementary current in response to an instantaneous value of load current.Type: ApplicationFiled: April 25, 2011Publication date: April 26, 2012Applicant: LIGHT-BASED TECHNOLOGIES INCORPORATEDInventors: Miroslaw Marek Grotkowski, Milen Moussakov, Gregory Bernard Sheehan, Tom William Thornton, Thomas George Foxall
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Publication number: 20120081022Abstract: A switched capacitor array having a plurality of capacitors arranged in a plurality of branches having different numbers of capacitors, and a plurality of switches connected to selectively couple the capacitors across the input or the output may be used for powering a variety of loads. A switched LED array may be dynamically configured based on a voltage supplied thereto, which may be supplied by a switched capacitor array. A lighting apparatus may be provided with first and second blocks, each block comprising a switched capacitor array, a switched LED array, and a control system.Type: ApplicationFiled: October 1, 2010Publication date: April 5, 2012Applicant: Light-Based Technologies IncorporatedInventors: Milen Moussakov, Gregory Bernard Sheehan