WO2012131367A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2012131367A1
WO2012131367A1 PCT/GB2012/050694 GB2012050694W WO2012131367A1 WO 2012131367 A1 WO2012131367 A1 WO 2012131367A1 GB 2012050694 W GB2012050694 W GB 2012050694W WO 2012131367 A1 WO2012131367 A1 WO 2012131367A1
Authority
WO
WIPO (PCT)
Prior art keywords
lighting device
terminals
primary
electronic circuitry
power
Prior art date
Application number
PCT/GB2012/050694
Other languages
English (en)
Inventor
Nicolas WILLIAMS
Original Assignee
Litonics Limited
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 Litonics Limited filed Critical Litonics Limited
Publication of WO2012131367A1 publication Critical patent/WO2012131367A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J9/065—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads for lighting purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/022—Emergency lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/26—Circuit arrangements for protecting against earth faults
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to lighting devices and in particular to lighting devices that have additional components and circuitry to enable the lighting device to emit light using electrical energy from a secondary power supply (such as a battery) if the primary power supply (such as a mains supply) is interrupted.
  • a secondary power supply such as a battery
  • the primary power supply such as a mains supply
  • these lighting devices are usually functionally termed “non-maintained” and are only intended to give emergency rather than mainstream illumination when the primary mains power supply is available. Therefore, the associated emergency lighting apparatus is operationally redundant whenever mains power is available and primary lighting is used instead.
  • the present inventor has previously proposed (in GB 2447495) an electric lighting device having circuitry that can detect mains failure and which can provide power to the lighting device from a backup battery provided in or close to the lighting device.
  • the described lighting device may have any physical form including a conventional light bulb, or an elongate form to fit conventional strip-light lamp holders.
  • One important function of this earlier lighting device is that it is able to distinguish between a failure in the mains power supply and a user controlled removal of the power supply at a light switch. As described in the inventor's earlier GB application, this is achieved by evaluating the impedance across the supply terminals.
  • the impedance When there is a mains power failure and the light is switched on, the impedance will be low; whereas when the user has switched off the light at a light switch the impedance will be high.
  • the present application describes a number of improvements to the lighting device that has a strip-light form that is described in the inventor's earlier GB application discussed above.
  • the invention provides a lighting device comprising: a body having first and second fittings; one or more light sources mounted within the body between the fittings; one or more primary input power terminals on each fitting for connection to receiving terminals of a lamp holder; a secondary input power terminal for receiving secondary power from a secondary power supply, for powering a light source of the lighting device; and electronic circuitry configured to control power delivery to the one or more light sources using power received at one or more of the input power terminals; wherein the one or more primary input power terminals on the first fitting are isolated from the electronic circuitry and wherein the second fitting comprises first and second primary input power terminals that are connected to the electronic circuitry for providing power to the electronic circuitry.
  • the body may be elongate and the fittings, end fittings.
  • the body of the lighting device will be light transmissive - for example translucent or transparent.
  • the electronic circuitry is configured to distinguish between: i) removal of a primary supply from the primary input terminals by a user opening a switch coupled, in use, to the lighting device; and ii) primary supply failure.
  • the electronic circuitry may provide power from the secondary power supply to one or more light sources of the lighting device to provide emergency lighting functionality.
  • the electronic circuitry may also comprise sensing circuitry configured to sense an external impedance connected to the primary input power terminals. The sensed external impedance may then be used to determine if there is a primary power failure.
  • the invention provides a lighting device comprising: a body having first and second fittings; one or more light sources mounted within the body between the fittings; one or more primary input power terminals on each fitting for connection to receiving terminals of a lamp holder; a secondary input power terminal for receiving secondary power from a secondary power supply, for powering a light source of the lighting device; an isolation device mounted within the body and connectable between the one or more primary input power terminals on one fitting and the one or more primary input power terminals on the other fitting; electronic circuitry configured to control power delivery to the one or more light sources using power received at one or more of the input power terminals; and a control device for causing said isolation device to isolate one or more of said primary input power terminals from said electronic circuitry.
  • the control device may comprise a manually operable switch.
  • the control device forms part of the electronic circuitry and is operable to determine if primary power is not present at the primary input power terminals and to determine an external impedance between the primary input power terminals and to connect the isolation device between the primary input power terminals on the first fitting and the electronic circuitry in dependence upon the determined absence of primary power and the determined external impedance.
  • the isolation device may be or comprise a switch, relay or latch arrangement.
  • the electronic circuitry may determine if the primary power is absent in dependence upon a control signal received from an external device; or by determining if the primary power is absent by sensing a voltage level or frequency of a signal received via the primary input power terminals.
  • Figure 1 is a schematic view of one embodiment of a strip lighting device for connection to a conventional strip-light lamp holder and wiring installation, and which can provide a backup light function in the event of mains power failure
  • Figure 2 is a schematic diagram illustrating one way in which the strip-light shown in Figure 1 is connected to a conventional strip-light connector
  • FIG 3 is a schematic view of the strip lighting device illustrated in Figure 1 modified to include an isolation device that can be connected between input power terminals of the lighting device;
  • Figure 4 is a schematic diagram illustrating a preferred way in which the strip-light shown in Figure 1 is connected to a conventional strip-light connector; and
  • Figure 5 is a schematic block diagram illustrating the main components of electronic circuitry forming part of the lighting device shown in the above Figures.
  • Figure 1 illustrates an emergency lighting device 1 that is in the form of a traditional strip- light having an elongate optically transparent (or translucent) tube 3 that is mechanically coupled to end fittings 5-1 and 5-2.
  • the end fittings 5 are for connecting the lighting device 1 to a conventional strip-light lamp holder (not shown), or similar light fitting or luminaire.
  • One or more light sources 7 are provided within the transparent tube 3.
  • two light sources 7-1 and 7-2 are provided, each including a plurality of light emitting diodes 9.
  • the multiple light emitting diodes 9 of each light source 7 are arranged in one or more arrays 1 1 -1 and 1 1 -2 so that the lighting device 1 has a wide angle of illumination.
  • the LED arrays 1 1 are mechanically fixed and thermally connected to a heatsink (not shown).
  • a heatsink (not shown).
  • the structure and function of the heatsink is described in the applicant's earlier GB application GB 1014428.5, the content of which is incorporated herein by reference.
  • the transparent tube 3 also includes a battery 17 for powering the light source(s) 7 in the event of mains power failure; electronic circuitry 19; a diagnostic indicator 23; and communication transducer 25.
  • the electronic circuitry 19 includes circuitry for sensing when there is a power failure and circuitry for coupling the battery 17 to the light sources 7 to provide light during such a power failure.
  • the lighting circuit in which the lighting device 1 will be installed
  • the lighting circuit will include one or more manually operable switches for allowing the user to switch on and off the lighting device 1. Therefore, the electronic circuitry 19 is able to sense when such switches are open and when they are closed.
  • One way in which this sensing can be performed is described the inventor's earlier GB patent GB 2447495 and improved ways of performing the sensing are disclosed in the applicant's GB application number GB 1 105485.5.
  • One or more of the system components inside the tube 3 may be interconnected by electrical connections 14, such as wires, bus bars, tracks or the like.
  • a Printed Circuit Board (PCB) or similar may be used to provide such electrical interconnection between the system components. Mounting the system components on the PCB also provides the advantage of mechanically locating the components relative to the PCB and hence at known positions within the tube 3 once the PCB is mounted therein.
  • the strip-light 1 has a pair of terminals 15-1 a and 15-1 b on end fitting 5-1 and a pair of terminals 15-2a and 15-2b on end fitting 5-2. As shown, the terminals 15 on each end fitting 5 are connected together and connected to the electronic circuitry 19 by connecting conductors 17-1 and 17-2 respectively and provide primary power to the electronic circuitry 19 for energy supply and allow for impedance sensing of the external lighting circuit.
  • a strip-light 1 When such a strip-light 1 is to be mounted in a conventional strip-light lamp holder to replace a luminaire of a different technology (such as a fluorescent tube or a mercury vapour gas discharge lamp), problems can occur since the strip light holder has been designed for specific use with such lamps.
  • a problem is due to the external circuit components required to excite or stimulate such fluorescent tubes into an illuminating condition.
  • these external circuit components typically include ballast circuitry (or similar current control circuitry) in close proximity to the lamp holder, usually connected between the incoming power supply and the terminals 15 of the fluorescent tube.
  • Such external circuitry also usually includes a "starter" or similar time- delay switch that is replaceable by the user and that provides the required short voltage boost to initiate gas discharge of the lamp.
  • Figure 2 schematically illustrates an electrical circuit diagram detailing the way in which the lighting device 1 shown in Figure 1 is electrically connected via the lamp holder (not shown) and ballast circuitry 20 to a mains power supply 21.
  • Figure 2 represents all the internal components of the lighting device 1 within a single box 28.
  • the primary (mains) supply terminal 21 -a is connected to lamp holder socket terminal 23-1 a and primary supply terminal 21 -b is connected to lamp holder socket terminal 23-2a.
  • Lamp holder socket terminal 23-1 a is for receiving and for making an electrical connection with terminal 15-1 a of the lighting device 1
  • lamp holder socket terminal 23-2a is for receiving and for making an electrical connection with terminal 15-2a of the lighting device 1.
  • lamp holder socket terminal 23-1 b and lamp holder socket terminal 23-2b are connected to respective input terminals (27-1 and 27-2) for a conventional starter switch which has been shown as having been removed, and so the connection between terminals 27-1 and 27-2 is open circuit.
  • the lighting device illustrated by Figure 2 therefore can be used in existing fluorescent tube lamp holders. Additionally, it is in most deployments not necessary to bypass the 5 ballast circuitry 20, as the circuitry 19 can still discern a difference in the external impedance of the lighting circuit between when the user operable switches are open circuit and when they are closed circuit, even if the ballast circuitry 20 is present.
  • the way in which the electronic circuitry can self tune its internal thresholds to cater for differing installations is described in the applicant's co-pending GB application GB 10 1 105485.5, the content of which is incorporated herein by reference.
  • control circuitry forming part of the circuitry 19 may be utilised to ensure that there is suitable electrical isolation between the supply terminals 30 15 when there is an absence of primary power supply and a high impedance is measured across the supply terminals 15 (both of which are measured by the electronic circuitry 19). This being indicative of: i) the lighting device 1 having been removed from its lamp holder; or ii) the primary power supply having been switched off at one or more external user operable switches interrupting the primary supply; or, of course, iii) that the lighting device 1 has not been fully installed within its lamp holder.
  • the absence of the primary power supply can be determined, for example, by sensing a voltage level or a frequency of a signal obtained at the supply terminals 15.
  • Figure 3 illustrates the lighting device 1 shown in Figure 1 modified to include such an isolating device, here in the form of a switch 29 that is controlled by a relay device 30 which is activated by the electronic circuitry 19.
  • a switch 29 which is controlled by a relay device 30 which is activated by the electronic circuitry 19.
  • This may be a once-only activation where the switch 29 can be latched in the closed position permanently by relay device 30, or until unlatched by relay device 30 when the relay device 30 is a bi-stable latching relay or the like, or for a certain amount of time when the relay device 30 is a timer relay.
  • the electronic circuitry 19 will be powered by the battery 17 during this pre- connection stage and if the battery 17 becomes too discharged the lighting device 1 will fail to operate as the switch 29 will never be activated without battery 17 being replaced.
  • This provides an additional safety feature, to prevent usage of the lighting device 1 in the event that the battery 17 has been depleted of charge, optionally requiring intervention of an external power supply or mechanical override to re-instate any device functionality.
  • This embodiment does not completely solve the safety problem as there is still the possibility that a user touching the terminals 15 on the unconnected end will be interpreted by the electronic circuitry 19 as the lamp being properly connected to the two ends of the lamp holder.
  • This problem can be solved by, for example, including a mechanical switch (not shown) on the lamp 3, which can be pressed by the user once the lamp 3 has been fully installed in the lamp holder. Activation of the switch may be detected by the electronic circuitry 19 which responds by activating the relay device 30 which closes the switch 29, thereby connecting the terminals 15-1 and 15-2 on both ends of the lighting device to the electronic circuitry 19. Alternatively, the user activated switch may directly control the switch 29 so that no electrical control is needed.
  • a mechanical switch is provided at each end of the lighting device 1 , such that the physical insertion of the lighting device into the lamp holder activates the switch, thereby connecting the terminal at that end to the electronic circuitry 19. In this way, the terminals 15 at both ends are only connected to the electronic circuitry 19 once the switches at both ends have been activated.
  • This live terminal safety issue could also be overcome by employing a sensor arrangement between the lighting device and lamp holder(s) to detect the presence of the lighting device and only allow mains voltage to be applied to the holder terminals 23 when the lighting device 1 is correctly in place.
  • a sensor arrangement could be achieved using a variety of sensing methods, such as magnets and reed switches, mechanical switches, Hall Effect switches, or other physical sensors.
  • an electronic system may be utilised, that requires some form of handshaking communication to be performed between the lamp holder and the lighting device 1 before the isolation device (e.g. switch 29) is removed from the circuit.
  • the isolation device may form part of the lamp holder instead of the lighting device 1.
  • terminals 15-2a and 15-2b are electrically connected together and isolated from other components within the lighting device 1 ; and the two primary input power terminals for the electronic circuitry 19 are formed by terminals 15-1 a and 15-1 b which are provided on one end fitting 5-1.
  • This arrangement thus interfaces the primary power supply at terminals 21 via all the four terminals 15 of the lighting device 1 and the corresponding mating lamp holder socket terminals 23.
  • each pair of terminals 15 on opposite ends of the lighting device 1 is electrically isolated from the other pair of terminals 15.
  • the closed circuit link 32 replacement for the starter is preferably a current limiting device such as a fuse, a temperature dependant semi-conductor device or some other suitable safety device, so that if the wrong type of lighting device is inserted into the lamp holder, the current limiting device will activate and prevent excessive current flow across the power terminals 21.
  • the internal connections between the terminals 15 and the internal components of the lighting device 1 may be programmable so that the lighting device 1 can be connected to a variety of external lamp holders, including, but not limited to, those illustrated in Figures 2 and 4. Programming may be achieved via appropriate user operable switches, fusible links, software logic controlled relays etc.
  • FIG. 5 is a block diagram illustrating the main components of the electronic circuitry 19 that can be used in the lighting devices 1.
  • the circuitry 19 includes a power supply unit 31 that has terminals 33 that are connected to the power supply terminals 15 on the end fitting(s) 5 (via the connectors 17-1 and 17-2 respectively); and secondary supply terminals 34 for connection to the positive and negative terminals of the battery 17.
  • the power supply unit 31 is configured to transform the primary supply voltage, for example by step-down transformer, switch mode power supply or other voltage reducing and rectifying subsystem; and to provide power derived from the primary supply (or if it senses that there is no primary supply at the supply terminals 33, to supply power from the battery 17 via terminals 34) to a processor 35 that controls the operation of the lighting device 1.
  • the power supply unit 31 also provides the power required for illuminating the light source 7.
  • the electronic circuitry 19 also includes sensing circuitry 37 which is configured to sense the impedance across the terminals 33; a charging circuit 39 for charging the battery 17 via the terminals 34; a diagnostic module 41 for performing the various diagnostic testing discussed above and for controlling the diagnostic indicator 23 via terminal 43; and a communications module 45 for communicating with remote devices via the communication transducer 25 connected via terminal 47.
  • the electronic circuitry 19 also includes two output drivers 50-1 and 50-2 that are controlled by the processor 35 and that provide the desired drive currents for driving the light sources 7 via output terminals 49 and 51.
  • the light sources 7 are arranged in two groups, with the light sources 7 in each group being driven by a respective one of the output drivers 50.
  • the processor 35 can switch on the light sources 7 in both groups at the same time or the light sources 7 in either one of the groups by controlling the respective output driver circuits 50.
  • the processor 35 can also vary the brightness of the light sources 7 in each group by setting a desired drive power for each output driver circuit 50.
  • the different modules are shown as being separate modules from the processor 35.
  • the functionality of many of the modules shown in Figure 5 will be software modules run by the processor 35 or a mix of software and hardware.
  • the modules have been illustrated in the form shown in Figure 5 for ease of understanding the functions and operation of the different modules. A more detailed description of the various modules will now be given.
  • the processor 35 is at the heart of the electronic circuitry 19 and controls the operation of all of the modules shown in Figure 5.
  • the processor 35 may be based on an ASIC device but is preferably a programmable processor (such as a PIC microcontroller) having memory and software that defines its operation. Such software controlled processors are easier to update with improved software or additional functionality after installation.
  • the processor 35 is responsible for controlling the position of the switch 29 via relay device 30. Charging Circuit
  • the charging circuit 39 is provided to monitor the charge status of the battery 17 (via the power supply unit 31 ) and to charge (or recharge) the battery 17 when needed. By monitoring the charge status of the battery 17, the charging circuit 39 can ensure that the battery 17 is not overcharged or charged too rapidly.
  • the charging circuit 29 can also signal the present battery charge status to the diagnostic module 41 for historical recording and analysis (such as to adjust brightness levels for a given minimum duration e.g. 3 hours) and/or for output to the user either via the diagnostic indicator 23 or via the communication transducer 25.
  • the diagnostic module 41 performs various diagnostic tests and presents the diagnostic results to the user via the diagnostic indicator 23.
  • the diagnostic results can also be stored within a memory (not shown) of the processor 35 to maintain an historical record of the operation of the lighting device 1.
  • the diagnostic module 41 may interact with the charging circuit 39 in order to obtain battery charge status information and with the sensing circuitry 37, the communication module 45 and the output drivers 50 to confirm correct operation thereof.
  • the operation of the diagnostic module 41 can be controlled by the user either via signals received using the communication transducer 25 or other signals communicated, for example, over the primary supply via terminals 15.
  • the communications module 45 is operable to control communication between the lighting device 1 and an external device or devices via the communication transducer 25.
  • the communications module 45 is responsible for performing any required modulation and demodulation of the data to be transmitted to and received from the remote device.
  • the communications module 45 may transmit diagnostic data obtained from the diagnostic module 41 to a remote device for remote monitoring of the operation of the lighting device 1.
  • user configuration data may be received from the remote device and programmed into the processor 35.
  • the output drivers 50 are controlled by the processor 35 and generate the driving currents (or voltages) required to drive the light sources 7.
  • the output driver 50 used will depend on the technology and configuration of the light source(s) 7 being driven.
  • the light sources 7 are LEDs and the output drivers 50 can be commercially available integrated circuit LED drivers having features such as efficient Pulse Width Modulation (PWM) current feedback driving of the LEDs, whether individually or in one or more "strings".
  • PWM Pulse Width Modulation
  • Each output driver 50 is controlled (independently or as a single entity) by the processor 35 and can generate a respective different drive current (or voltage) at its output terminals 49/51.
  • the output drivers 50 obtain their power for generating the drive signals from supply voltages generated by the power supply unit 31.
  • the sensing circuitry 37 is configured to sense the impedance across the primary supply terminals 33 via the power supply unit 31.
  • the sensing circuitry 37 senses whether primary power is absent from the terminals 33 and senses the external impedance connected across the terminals 33 and then signals the processor 35 accordingly.
  • the way in which this connection is made and the way in which the sensing circuitry 37 can perform the measurements are described in the applicant's co-pending GB application number GB 1 105485.5.
  • the lighting device included a battery 17 for providing a backup or secondary power supply in the event of primary power supply failure.
  • the battery can be of any technology, replaceable or non-replaceable and multiple batteries may be provided connected in series and/or in parallel. Each battery itself may comprise a single cell or multiple cells as appropriate to the battery technology.
  • other charge storage devices may be used to provide a secondary power supply, such as a capacitor.
  • batteries are preferred since they can provide secondary power over a longer period of time.
  • the secondary storage device is preferably mounted internal to the lighting device, but it can be mounted externally if desired.
  • the battery can be isolated from the electronic circuitry 19 so that the lighting device can only operate in its primary mode of operation. This may be done in response to a received user input or in response to detecting a battery fault or a fault in another system component.
  • the light sources that were used in the lighting device 1 were LEDs.
  • the use of LEDs is preferred given the ease with which they can be controlled (e.g. output intensity), their long expected operating life, rough handling ability and of particular advantage (given the battery- operation mode potential of the device) their low power consumption.
  • the light sources can be formed from any lighting technology, such as compact fluorescent tubes, incandescent lighting (such as halogen lighting) etc.
  • the lighting device included diagnostic and communication circuitry. As those skilled in the art will appreciate, this circuitry is not essential and could be omitted if desired. Additionally, one or more user switches or inputs may be mounted on the lighting device. This user input can be used to cause the lighting device to enter a given mode of operation or to enter user configurations or to initiate a diagnostic or self-test.
  • the lighting device included a communications module 45 that was able to communicate with external devices using a communication transducer 25.
  • the communications module 45 may be arranged to communicate with the external devices by receiving and/or transmitting signals over the mains lighting circuit in which the lighting device 1 is installed. Such communication signals would be transmitted at a different frequency to the mains signal in order that the communication signals can be separated from the mains signal.
  • the electronic circuitry 19 could communicate with one or more remote devices by varying the light produced by the light sources 7, for example switching them on and off in dependence upon the data to be transmitted. A receiver in the remote device would recover the data by detecting the variation in the light produced by the light source(s) 7.
  • the lighting device 1 had a number of light sources of the same type (in this case LEDs) arranged into two groups that were independently driveable by the electronic circuitry 19. This is not essential - the light sources may not be independently driveable and/or the light sources may be of different types. For example, one type of light source may be provided for use when primary power is available via terminals 15 and a second type of light source may be provided for use when power is being supplied by the battery 17. Such an arrangement offers a number of improvements including reduction in power consumption verses quality and quantity of light output, manufacturing cost, and built-in redundancy for an increased margin of safety or component lifespan.
  • the lighting device had an elongate tubular body 3.
  • the body 3 does not need to be elongate and may have any shape.
  • the body can also be translucent as well as transparent.
  • each end fitting 5 included a pair of power supply terminals 15.
  • one or more of the end fittings may only include a single power supply terminal 15 that connect with the corresponding lamp holder terminals 23 at that end of the lamp holder.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un dispositif d'éclairage possédant un corps comprenant des premiers et deuxième raccords, une ou plusieurs sources de lumière montées dans le corps entre les raccords; une ou plusieurs bornes d'alimentation électrique primaire sur chaque raccord à connecter aux bornes de réception d'un support de lampe; une borne d'alimentation électrique secondaire pour recevoir l'énergie secondaire d'une alimentation électrique secondaire, pour l'alimentation électrique d'une source de lumière du dispositif d'éclairage; et des circuits électroniques configurés pour commander l'énergie délivrée à la/les sources de lumière utilisant l'énergie reçue au niveau d'une ou plusieurs bornes d'alimentation électrique. La/les bornes d'alimentation électrique primaire sur le premier raccord sont connectées électriquement ensemble et isolées des circuits électroniques et les bornes d'alimentation électrique primaire sur l'autre raccord sont connectées aux circuits électriques pour fournir de l'énergie aux circuits électriques.
PCT/GB2012/050694 2011-03-31 2012-03-28 Dispositif d'éclairage WO2012131367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1105510.0A GB2489513B (en) 2011-03-31 2011-03-31 Lighting device
GB1105510.0 2011-03-31

Publications (1)

Publication Number Publication Date
WO2012131367A1 true WO2012131367A1 (fr) 2012-10-04

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Country Status (2)

Country Link
GB (1) GB2489513B (fr)
WO (1) WO2012131367A1 (fr)

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CN109587871A (zh) * 2018-10-11 2019-04-05 上海德罕电子科技有限公司 一种灯光指示系统及其控制方法

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PT3050399T (pt) 2013-09-25 2019-04-01 Silicon Hill Bv Sistema de iluminação de led
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GB2521659B (en) * 2013-12-27 2020-04-08 Novar Ed&S Ltd Elongate LED lamp with indicator
CN107432066B (zh) 2015-03-26 2019-07-09 硅山有限公司 Led照明系统
DE102016102348A1 (de) * 2016-02-10 2017-08-10 Ecotec-Energy Vertriebs-Gmbh Transformatorloses Netzteil, insbesondere für LED-Beleuchtungssysteme
WO2017160883A1 (fr) 2016-03-15 2017-09-21 Energy Focus, Inc. Lampe et douille de lampe ayant de multiples connecteurs
WO2017184910A1 (fr) * 2016-04-22 2017-10-26 Energy Focus, Inc. Lampe à fonction de batterie de secours
US10892615B2 (en) 2017-04-25 2021-01-12 Energy Focus, Inc. Circuit for mitigating electric shock

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US20040012959A1 (en) * 2002-07-17 2004-01-22 Robertson Jones J. LED replacement for fluorescent lighting
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WO2007004190A2 (fr) * 2005-07-06 2007-01-11 Koninklijke Philips Electronics N.V. Lampe fluorescente a energie efficace
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US20110057572A1 (en) * 2009-09-08 2011-03-10 Denovo Lighting, L.L.C. Voltage regulating devices in LED lamps with multiple power sources
US20110068692A1 (en) * 2009-09-24 2011-03-24 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
US20110163672A1 (en) * 2009-12-31 2011-07-07 Shew Larry N Light assembly
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109587871A (zh) * 2018-10-11 2019-04-05 上海德罕电子科技有限公司 一种灯光指示系统及其控制方法

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GB201105510D0 (en) 2011-05-18
GB2489513A (en) 2012-10-03

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