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US20140239809A1 - Devices and systems having ac led circuits and methods of driving the same - Google Patents

Devices and systems having ac led circuits and methods of driving the same Download PDF

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Publication number
US20140239809A1
US20140239809A1 US14/239,504 US201214239504A US2014239809A1 US 20140239809 A1 US20140239809 A1 US 20140239809A1 US 201214239504 A US201214239504 A US 201214239504A US 2014239809 A1 US2014239809 A1 US 2014239809A1
Authority
US
United States
Prior art keywords
led
circuit
leds
series
lighting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/239,504
Other languages
English (en)
Inventor
Michael Miskin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lynk Labs Inc
Original Assignee
Lynk Labs Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lynk Labs Inc filed Critical Lynk Labs Inc
Priority to US14/239,504 priority Critical patent/US20140239809A1/en
Publication of US20140239809A1 publication Critical patent/US20140239809A1/en
Assigned to LYNK LABS, INC. reassignment LYNK LABS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MISKIN, MICHAEL
Abandoned legal-status Critical Current

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Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • H05B33/0821—
    • F21S48/115—
    • F21S48/215—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/42—Antiparallel configurations
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects

Definitions

  • two or more circuits connected in series or parallel may be formed on a single chip or substrate.
  • two power connection leads may be provided and electrically connected to the two or more circuits to enable the two or more circuits to connect to an AC or DC power supply.
  • the circuits may be connected in series, parallel, or series-parallel configurations.
  • the at least two circuits on the chip or substrate may be electrically unconnected and be provided with separate and distinct power connection leads connected at the opposite ends of each circuit, allowing the circuits to be connected in any manner desired or required by an end user.
  • the lighting device may be integrated within a lamp or bulb for use in a lighting system.
  • the lamp may include a base having at least two power connection leads, the power connection leads being capable of connection to the device and at least one circuit so as to be capable of providing power to the at least one circuit from a power source.
  • the lamp may be designed for a specific use, such as general lighting type incandescent replacement lamps and/or a brake light or head light in an automobile. It should be appreciated by those having ordinary skill in the art that any lamp design known in the art may be created utilizing any of the circuits described herein, and that the lamps may be used for any use. Examples of lamps that may be designed using the circuits, chips, packages and other LED devices described herein, include but are not limited to, Edison or E-base type lamps, festoon lamps, bi-pin lamps, or wedge base lamps.
  • the lighting system may include at least one current limiting diode connected in series with the at least one circuit, or at least one current limiting diode connected in series with each of the at least one LED forward biased by the DC power source and the at least one LED is reversed biased by the DC power source.
  • the polarity of the DC power across the load may be reversed manually using a switch capable of controlling the connection between the DC power supply and the at least one load.
  • Manually switching a system switch to an alternate setting may forward bias the at least one LED that was previously reverse biased if the at least one LED previously configured to forward biased is no longer emitting light.
  • the switch may be configured to forward bias either LED, regardless of whether either LED has failed.
  • the DC power may be manually reversed by disconnecting the load, i.e. a circuit or device, from the DC power supply, and reconnecting it in a reversed configuration so that the power connection previously connected to ground or the low side of the DC supply is then connected to the high voltage side of the DC supply.
  • FIG. 2 shows a schematic view of a circuit as contemplated by the invention
  • current limiting diode 30 as cross-connecting branch 28 has the advantage of allowing a substantially constant current to flow during both the positive and negative phases as well.
  • a substantially constant current may extend the lifespan of each LED. Inasmuch as the amount of light emitted by an LED is determined by the amount of current flowing through the LED, allowing a substantially constant amount of current through the circuit helps to mitigate any flicker effect caused by the AC voltage cycling. With a current limiting diode, the amount of light emitted by each LED will remain substantially constant during its respective conducting phase. A standard resistor is incapable of maintaining a substantially constant current.
  • packages 100 , 110 may be flip chips having power connections located on a bottom surface.
  • chips 80 , 90 it is contemplated that the circuits shown in FIGS. 2-4 may likewise be formed on a substrate by wire bonding individual LED die and current limiting diodes in the disclosed configuration.
  • each circuit contained on the chip or within the package may be provided with its own power connection leads.
  • chip 140 may be provided with at least circuits 70 , each circuit having its own power connection lead, 142 , 144 and 146 , 148 .
  • the power connection leads from each circuit may then be connected to any driver or power source for the chip in any manner desired by an end user.
  • circuits 70 may be connected in series with each other at power connection leads 144 and 148 while leads 142 and 146 connect to a power source.
  • the device or system into which the circuit(s) is incorporated may include a switch or the like capable of connecting the DC power to the load in both a “positive” and a “negative” polarity where “positive” polarity forward biases at least a first LED and reverse biases at least a second LED, and “negative” polarity forward biases at least the second LED and reverses biases at least the first LED.
  • a switch embodiment may be realized as simply as controlling two pairs of switches or relays controlled by a manual external switch, each pair having a switch or relay connected to an opposite end of the circuit, or by using a double pole double throw (DPDT) switch with an off position.
  • DPDT double pole double throw
  • the switch When utilizing a switch, if the forward biased LEDs fail and stop emitting light within the device or system, the switch may be moved to a secondary position, or a reverse position, to reverse the polarity of the DC power provided to the LED circuit and forward bias the previously reverse biased LED(s). It is contemplated that during operation, the switch may be moved to any position, allowing either set of LED(s) to be forward biased without waiting for one set to fail.
  • the lighting device or system may include a sensor to monitor or “sense” the load (the circuit or device) and determine whether the circuit (i.e. the forward biased LED(s)) are operational and conducting current. If the sensor determines that the forward biased LED(s) (i.e. the load) is not operational and providing a voltage and/or current, using a signal provided (or not provided) to TTL logic gates, devices or circuits or a microcontroller may control a switch, relay or other circuitry to reverse the polarity of the DC power dynamically and forward bias and the previously reverse biased LED(s).
  • System 160 may include a DC power supply 162 connected to device 164 which includes circuit 166 which may be any circuit discussed herein.
  • load sensor 168 may be included within device 164 . So long as load sensor 168 detects that the forward biased LEDs are operational, i.e. conducting current and/or voltage, the polarity of the power provided by the DC power supply will remain the same, and the forward biased diodes will be used to emit light. Once load sensor 168 fails to detect an output from the forward biased LED(s) in circuit 166 (i.e.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
US14/239,504 2011-08-18 2012-08-20 Devices and systems having ac led circuits and methods of driving the same Abandoned US20140239809A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/239,504 US20140239809A1 (en) 2011-08-18 2012-08-20 Devices and systems having ac led circuits and methods of driving the same

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161575273P 2011-08-18 2011-08-18
PCT/US2012/051531 WO2013026053A1 (fr) 2011-08-18 2012-08-20 Dispositifs et systèmes ayant des circuits de del à courant alternatif et procédés de commande de ceux-ci
US14/239,504 US20140239809A1 (en) 2011-08-18 2012-08-20 Devices and systems having ac led circuits and methods of driving the same

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/051531 A-371-Of-International WO2013026053A1 (fr) 2011-08-18 2012-08-20 Dispositifs et systèmes ayant des circuits de del à courant alternatif et procédés de commande de ceux-ci

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/886,252 Continuation US9693405B2 (en) 2011-08-18 2015-10-19 Devices and systems having AC LED circuits and methods of driving the same

Publications (1)

Publication Number Publication Date
US20140239809A1 true US20140239809A1 (en) 2014-08-28

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ID=47715511

Family Applications (5)

Application Number Title Priority Date Filing Date
US14/239,504 Abandoned US20140239809A1 (en) 2011-08-18 2012-08-20 Devices and systems having ac led circuits and methods of driving the same
US14/886,252 Active US9693405B2 (en) 2011-08-18 2015-10-19 Devices and systems having AC LED circuits and methods of driving the same
US15/632,906 Active US10257892B2 (en) 2011-08-18 2017-06-26 Devices and systems having AC LED circuits and methods of driving the same
US16/378,314 Active US11953167B2 (en) 2011-08-18 2019-04-08 Devices and systems having AC LED circuits and methods of driving the same
US18/629,212 Active US12435847B2 (en) 2011-08-18 2024-04-08 Devices and systems having LED circuits and methods of driving the same

Family Applications After (4)

Application Number Title Priority Date Filing Date
US14/886,252 Active US9693405B2 (en) 2011-08-18 2015-10-19 Devices and systems having AC LED circuits and methods of driving the same
US15/632,906 Active US10257892B2 (en) 2011-08-18 2017-06-26 Devices and systems having AC LED circuits and methods of driving the same
US16/378,314 Active US11953167B2 (en) 2011-08-18 2019-04-08 Devices and systems having AC LED circuits and methods of driving the same
US18/629,212 Active US12435847B2 (en) 2011-08-18 2024-04-08 Devices and systems having LED circuits and methods of driving the same

Country Status (2)

Country Link
US (5) US20140239809A1 (fr)
WO (1) WO2013026053A1 (fr)

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US11953167B2 (en) 2024-04-09
US9693405B2 (en) 2017-06-27
US20170295616A1 (en) 2017-10-12
US10257892B2 (en) 2019-04-09
US12435847B2 (en) 2025-10-07
WO2013026053A1 (fr) 2013-02-21
US20240255110A1 (en) 2024-08-01
US20160057827A1 (en) 2016-02-25
US20190306943A1 (en) 2019-10-03

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