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US Patent 11785684 Light apparatus with parallel-arranged LEDs and per-LED drivers

Patent 11785684 was granted and assigned to Textron Systems on October, 2023 by the United States Patent and Trademark Office.

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Contents

Is a
Patent
Patent

Patent attributes

Patent Applicant
Textron Systems
Textron Systems
Current Assignee
Textron Systems
Textron Systems
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
11785684
Patent Inventor Names
Timothy Michael James
Andrew John Seager
Date of Patent
October 10, 2023
Patent Application Number
17543011
Date Filed
December 6, 2021
Patent Citations
‌
US Patent 8179059 Circuit and method for controlling light emitting device, and integrated circuit therefor
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US Patent 8476837 Transistor ladder network for driving a light emitting diode series string
‌
US Patent 8531118 AC light emitting diode and AC LED drive methods and apparatus
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US Patent 8736099 Device and method for coupling two parts of a DC network, particularly in an aircraft
‌
US Patent 8665922 Driver circuit of light-emitting element
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US Patent 9461027 LED package and manufacturing method
‌
US Patent 9516718 LED luminescence apparatus
‌
US Patent 10165637 LED lighting device using AC power supply
...
Patent Primary Examiner
‌
Monica C King
CPC Code
‌
H05B 45/52
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H05B 45/56
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H05B 44/00
‌
H05B 47/11
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H05B 47/16
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H05B 47/19
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H05B 45/30
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H05B 45/31
...
Patent abstract

A light apparatus includes an array of light-emitting diodes (LEDs) in parallel arrangement, in which the LEDs have respective first terminals coupled together for connection to a supply node of a power source that provides the drive current to the LEDs during operation. Driver circuity is disposed between respective second terminals of the LEDs and a return node of the power source. The driver circuitry includes a respective LED driver for each of the LEDs, and each LED driver includes (1) a transistor connected to the second terminal of the respective LED, and (2) a resistor in series between the transistor and a return node of the power source, the transistors of the LED drivers having respective control inputs for receiving respective LED drive signals to control operation of the LEDs.

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