Patents by Inventor Daniel Ross Herrington
Daniel Ross Herrington has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10904977Abstract: A light emitting diode system allows for high current end user LED matrix applications while mitigating internal damage to control circuitry that may be caused by excess current flow. In one example, multiple switches operate in parallel across an LED. When an overvoltage condition is detected in a first switch, a logic circuit determines those switches programmed to operate in parallel and causes them to conduct current. This reduces the amount of current flowing through any one switch and mitigates harm to the device. The parallel configuration of switches may be driven by a single pulse width modulated current. This allows the drive current to be divided between parallel transistors, limiting the damaging effects that can be caused by high currents flowing through the transistors.Type: GrantFiled: April 10, 2019Date of Patent: January 26, 2021Assignee: Texas Instruments IncorporatedInventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
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Publication number: 20190306938Abstract: A light emitting diode system allows for high current end user LED matrix applications while mitigating internal damage to control circuitry that may be caused by excess current flow. In one example, multiple switches operate in parallel across an LED. When an overvoltage condition is detected in a first switch, a logic circuit determines those switches programed to operate in parallel and causes them to conduct current. This reduces the amount of current flowing through any one switch and mitigates harm to the device. The parallel configuration of switches may be driven by a single pulse width modulated current. This allows the drive current to be divided between parallel transistors, limiting the damaging effects that can be caused by high currents flowing through the transistors.Type: ApplicationFiled: April 10, 2019Publication date: October 3, 2019Inventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
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Patent number: 10306731Abstract: A light emitting diode system allows for high current end user LED matrix applications while mitigating internal damage to control circuitry that may be caused by excess current flow. In one example, multiple switches operate in parallel across an LED. When an overvoltage condition is detected in a first switch, a logic circuit determines those switches programmed to operate in parallel and causes them to conduct current. This reduces the amount of current flowing through any one switch and mitigates harm to the device. The parallel configuration of switches may be driven by a single pulse width modulated current. This allows the drive current to be divided between parallel transistors, limiting the damaging effects that can be caused by high currents flowing through the transistors.Type: GrantFiled: May 5, 2017Date of Patent: May 28, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
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Patent number: 10070491Abstract: A light system (FIG. 2) is disclosed. The light system includes a plurality of series connected light emitting diodes (240-246). Each of a plurality of switching devices (230-236) has a control terminal and each has a current path coupled in parallel with a respective LED. A plurality of fault detector circuits (220-226) are each coupled in parallel with a respective light emitting diode. Each fault detector circuit has a first comparator (FIG. 7, 704) arranged to compare a voltage across the respective light emitting diode to a respective first reference voltage (708). When a fault is detected, a control signal is applied to the control terminal to turn on a respective switching device of the plurality of switching devices.Type: GrantFiled: December 2, 2015Date of Patent: September 4, 2018Assignee: Texas Instruments IncorporatedInventors: Joseph V. DeNicholas, Perry Tsao, Christoph Goeltner, Daniel Ross Herrington, James Masson, James Patterson, Werner Berns
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Patent number: 9944413Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: GrantFiled: October 25, 2017Date of Patent: April 17, 2018Assignee: Texas Instruments IncorporatedInventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Publication number: 20180044040Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: ApplicationFiled: October 25, 2017Publication date: February 15, 2018Inventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Patent number: 9832828Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: GrantFiled: July 13, 2015Date of Patent: November 28, 2017Assignee: Texas Instruments IncorporatedInventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Publication number: 20170325300Abstract: A light emitting diode system allows for high current end user LED matrix applications while mitigating internal damage to control circuitry that may be caused by excess current flow. In one example, multiple switches operate in parallel across an LED. When an overvoltage condition is detected in a first switch, a logic circuit determines those switches programmed to operate in parallel and causes them to conduct current. This reduces the amount of current flowing through any one switch and mitigates harm to the device. The parallel configuration of switches may be driven by a single pulse width modulated current. This allows the drive current to be divided between parallel transistors, limiting the damaging effects that can be caused by high currents flowing through the transistors.Type: ApplicationFiled: May 5, 2017Publication date: November 9, 2017Inventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
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Publication number: 20160088699Abstract: A light system (FIG. 2) is disclosed. The light system includes a plurality of series connected light emitting diodes (240-246). Each of a plurality of switching devices (230-236) has a control terminal and each has a current path coupled in parallel with a respective LED. A plurality of fault detector circuits (220-226) are each coupled in parallel with a respective light emitting diode. Each fault detector circuit has a first comparator (FIG. 7, 704) arranged to compare a voltage across the respective light emitting diode to a respective first reference voltage (708). When a fault is detected, a control signal is applied to the control terminal to turn on a respective switching device of the plurality of switching devices.Type: ApplicationFiled: December 2, 2015Publication date: March 24, 2016Inventors: Joseph V. DeNicholas, Perry Tsao, Christoph Goeltner, Daniel Ross Herrington, James Masson, James Patterson, Werner Berns
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Patent number: 9253850Abstract: A light system (FIG. 2) is disclosed. The light system includes a plurality of series connected light emitting diodes (240-246). Each of a plurality of switching devices (230-236) has a control terminal and each has a current path coupled in parallel with a respective LED. A plurality of fault detector circuits (220-226) are each coupled in parallel with a respective light emitting diode. Each fault detector circuit has a first comparator (FIG. 7, 704) arranged to compare a voltage across the respective light emitting diode to a respective first reference voltage (708). When a fault is defected, a control signal is applied to the control terminal to turn on a respective switching device of the plurality of switching devices.Type: GrantFiled: April 26, 2013Date of Patent: February 2, 2016Assignees: Texas Instruments Incorporated, Texas Instruments Deutschland GmbHInventors: Joseph V. DeNicholas, Perry Tsao, Christoph Goeltner, Daniel Ross Herrington, James Masson, James Patterson, Werner Berns
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Publication number: 20160014863Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: ApplicationFiled: July 13, 2015Publication date: January 14, 2016Inventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Patent number: 9084319Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: GrantFiled: November 2, 2012Date of Patent: July 14, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Publication number: 20140125239Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.Type: ApplicationFiled: November 2, 2012Publication date: May 8, 2014Applicant: Texas Instruments IncorporatedInventors: Timothy Roy Sullivan, Daniel Ross Herrington
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Publication number: 20130313973Abstract: A light system (FIG. 2) is disclosed. The light system includes a plurality of series connected light emitting diodes (240-246). Each of a plurality of switching devices (230-236) has a control terminal and each has a current path coupled in parallel with a respective LED. A plurality of fault detector circuits (220-226) are each coupled in parallel with a respective light emitting diode. Each fault detector circuit has a first comparator (FIG. 7, 704) arranged to compare a voltage across the respective light emitting diode to a respective first reference voltage (708). When a fault is defected, a control signal is applied to the control terminal to turn on a respective switching device of the plurality of switching devices.Type: ApplicationFiled: April 26, 2013Publication date: November 28, 2013Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Joseph V. DeNicholas, Perry Tsao, Christoph Goeltner, Daniel Ross Herrington, James Masson, James Patterson, Werner Berns