WO2018065404A1 - Dispositif d'éclairage tubulaire comprenant une antenne colinéaire en série - Google Patents

Dispositif d'éclairage tubulaire comprenant une antenne colinéaire en série Download PDF

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Publication number
WO2018065404A1
WO2018065404A1 PCT/EP2017/075056 EP2017075056W WO2018065404A1 WO 2018065404 A1 WO2018065404 A1 WO 2018065404A1 EP 2017075056 W EP2017075056 W EP 2017075056W WO 2018065404 A1 WO2018065404 A1 WO 2018065404A1
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WO
WIPO (PCT)
Prior art keywords
lighting device
coil
tubular
phase
antenna
Prior art date
Application number
PCT/EP2017/075056
Other languages
English (en)
Inventor
Wei Hong ZHAO
Peiliang DONG
Liang Shi
Jun Yao
Gang Wang
Original Assignee
Philips Lighting Holding B.V.
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 Philips Lighting Holding B.V. filed Critical Philips Lighting Holding B.V.
Publication of WO2018065404A1 publication Critical patent/WO2018065404A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • 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
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/045—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor receiving a signal from a remote controller
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • 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]
    • 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
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
    • F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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

  • Tubular lighting device comprising a series collinear antenna
  • This present invention relates to the field of antennas, and more particularly to a series collinear antenna for communication of RF signals to lighting devices.
  • Intelligent lighting has become widespread, and RF communication is a technology widely used for remote management of lighting devices. Instead of controlling the power (e.g. 230V supply) to the lighting device, the recent trend has moved towards directly controlling the light source or lighting device (i.e. the exchangeable lighting element lighting device) by sending an RF control signal to the lighting device.
  • the power e.g. 230V supply
  • directly controlling the light source or lighting device i.e. the exchangeable lighting element lighting device
  • tubular lighting device is the most commonly employed lighting device, and, due to this, a tubular LED (TLED) has been designed to be a retro-fit lighting device which can replace a conventional tubular lighting device without requiring modification to the lighting fixture.
  • TLED tubular LED
  • Wireless communication functionality is normally enabled in lighting devices by adding an RF module and associated antenna into the lighting device.
  • the structure e.g. tubular housing, shape and size
  • antenna performance e.g. to having limited wireless control range/direction. This is particularly problematic in view of recent developments in mesh network optimization and/or functionality that require an antenna to support extended wireless control range/direction.
  • Series collinear antenna segments are well known in the field of antenna design. They consist of a number of alternate radiating elements and inter-element phasing sections resulting in a phased array antenna. Each radiating element is optimally fed in phase so that the radiating elements will radiate in unison. Each individual radiating element is designed to be of a specific physical length in order to provide the most effective radiation of power for a given wavelength. Following each active radiating element is an inter-element phasing section, wherein the radiation from the antenna is suppressed until the next correct phase point on the wavefront is reached, so that the next radiating element is then fed in series.
  • the ideal theoretical physical length of the radiating element should be 1/2 ⁇ (where ⁇ is the design wavelength for the antenna) and the ideal theoretical physical spacing between two radiating elements should be 1/4 ⁇ (as measured from the top of one radiating element to the bottom of the next radiating element).
  • US20080079640A1 discloses a compact multi-element antenna with phase shift.
  • EP1411588A1 discloses a broad band antenna in a radome.
  • WO2016066564A1 discloses a wireless LED tube lamp device.
  • a basic idea of proposed embodiments is to employ, in a tubular lamp, a coil- based series collinear antenna design (comprising alternate radiating elements and coil-based inter-element phasing sections) and then use a phase adjustment circuit coupled to the coil of an inter-element phasing section.
  • the turns e.g. turn number
  • the phase adjustment circuit may comprise a plurality of switches, and the switches may be manipulated so as to either disconnect or connect turns of the coil.
  • the coil arrangement can be replaced by other kind of phase balance arrangement such as track or phase stub that provides a phase delay.
  • the antenna may support a range of directivities/antenna diversity. Further, such adjustment may be achieved in an automatic and/or controlled manner such that the antenna may provide self- adjustment functionality. For example, by receptions at different directivities and finding the optimized reception, an optimized directivity corresponding to that optimized reception can be determined.
  • a further idea of the application is implementing this coil-based series collinear antenna in a tubular lighting device.
  • a tubular housing that is elongated in a longitudinal direction; light emitting elements within the tubular housing; and a series collinear antenna comprising: first and second radiating elements connected in series and oriented along the longitudinal direction; a phase balance arrangement connected between the first and second radiating elements, the phase balance arrangement being adapted to introduce a phase delay to radiation from the first radiating element before feeding the radiation to the second radiating element; and a phase adjustment circuit coupled to the phase balance arrangement and adapted to modify the phase delay.
  • the series collinear antenna may be designed with compact dimensions (so as to fit within
  • predetermined housing dimensions for example
  • Embodiments may therefore provide for improved communication abilities of a wider range of wavelengths when compared to conventional series collinear antennae.
  • a series collinear antenna according to an embodiment may therefore be designed with dimensions that enable use in tubular lighting device.
  • embodiments may be suitable for low energy replacement lamps (such as smart TLEDS) which can be remote controlled, e.g. with respect to such as on/off, intensity, color, beam width, and light orientation.
  • the lighting device may comprise a tubular LED.
  • Embodiments may thus be applicable to smart TLEDs, although they may also be applicable to other types of smart tubular lighting devices. Such applicability to smart TLEDs may make proposed embodiments useful for a wide range of applications.
  • the phase balance arrangement is implemented by coil. Proposed is a concept for altering the suppression of radiation caused by a coil-based inter-element phasing section through the use of a phase adjustment arrangement to alter the effective number of turns in a coil of the inter-element phasing section.
  • the radiation pattern more specifically the directivity/antenna diversity, of the antenna can be changed, thereby enabling the antenna to be adjusted.
  • the phase delay introduced between neighboring radiating elements can be changed by changing the number of turns of a coil connected between the neighboring radiating elements. Simple arrangements may thus be employed, thereby reducing the associated complexity and/or cost of embodiments.
  • the phase adjustment circuit may be adapted to modify a number of coil turns of the coil arrangement in response to a control signal.
  • Simply changing the number of effective turns of the coil arrangement may change the amount of suppression of radiation (e.g. phase delay) caused by the coil arrangement.
  • Phase adjustment, and thus wavelength tuning of the antenna may therefore be achieved using a relatively simple arrangement.
  • the phase adjustment circuit may comprise a switch arrangement comprising at least one switch connected in parallel with at least one turn of a coil of the coil arrangement, said switch being adapted to be selectively short circuit said turn of the coil.
  • Cheap components and relatively simple circuitry arrangements may be used, thereby reducing the associated complexity and/or cost of obtaining an improved series collinear antenna.
  • the coil may comprise steel wire connected between the first and second radiating elements, and wherein a switch is connected between turns of the steel wire.
  • the phase adjustment circuit may be adapted to modify the phase delay so as to modify an angle between the longitudinal direction and the radiation pattern of the collinear antenna. This may enable adjustment and control of the radiation pattern, thereby facilitating optimization of the antenna.
  • each of the first and second radiating elements may comprise line radiators.
  • Elongated radiators that are able to fit inside lighting devices with compact cross-sections may thus be employed by embodiments.
  • the use of line radiators may enable embodiments to fit inside the tubular housing of a tubular lighting device.
  • Other forms of radiators may also be employed.
  • the line radiator can be replaced by patterned antenna like a meandered antenna.
  • the first and second radiating elements may be provided on an elongated substrate that is curved about a longitudinal axis extending in the longitudinal direction.
  • the first and second radiating elements may be printed on the substrate, and electrical contacts may be provided at the ends of the radiating elements.
  • an antenna according to an embodiment may be provided in a form which enables it to be inserted in housing of compact cross-section, such as tubular housing. After insertion, the contacts may enable connection of the coil arrangement in a simple manner, assisting the manufacture process of a device (such as a smart lighting device for example)
  • the tubular housing may comprise a housing portion formed from an elongated substrate that is curved about the longitudinal axis, and the first and second radiating elements may be provided on the housing portion.
  • the first and second radiating elements may thus be provided on the curved housing portion, and this curved housing portion may form at least part of the upper or lower part of the tubular lighting device.
  • the first and second radiating elements may be provided on the inner surface of the lens part of a TLED. In this way, components of the antenna may be integrated with the lighting device so as to maximize use of the available space within the device.
  • first and second radiating elements may be printed on the substrate, and electrical contacts may be provided at the ends of the radiating elements.
  • established printing techniques including 3D printing
  • the phase adjustment circuit may be provided on a Printed Circuit Board
  • the coil arrangement may comprise a coil having a plurality of turns with a diameter substantially equal to that of the tubular housing. In this way, the coil arrangement may make maximum possible use of the available space in the tubular housing.
  • Such proposed embodiment may be designed and optimized for use in tubular lighting devices.
  • said phase balance arrangement comprises a track with a total length
  • the phase adjustment circuit comprises at least one switch placed aside the track and adapted to short circuit a portion of the track thereby tuning an effective length of the meandered track between the first and second radiating elements.
  • This embodiment provides another implementation for the phase delay element.
  • the track and switch are easily assembled together, like in a PCB, and the assembly tolerance is low.
  • the track comprises a half closed phasing stub or a completely closed phasing stub.
  • Embodiments may be employed in conjunction with new or existing lamps.
  • an embodiment may be retro-fitted to a conventional lamp, whereas another embodiment may be integrated into a new lamp at time of manufacture.
  • an aspect of the invention may provide a lamp comprising a lighting device according to an embodiment.
  • Embodiments may be employed in the field of building lighting, stadium lighting, home/residential lighting, temporary lighting, and other fields/applications where remotely controllable lighting is desirable.
  • Embodiments may be employed in conjunction with a remote control unit for wireless RF control of a lighting device.
  • a lighting system comprising: a tubular lighting device according to a proposed embodiment; and a remote control unit adapted to communicate, with the series collinear antenna of the tubular lighting device, an RF signal for controlling of at least one parameter of the tubular lighting device.
  • Fig. 1 is a schematic drawing of a series collinear antenna according to an embodiment
  • Fig. 2A illustrates simulation results for the embodiment of Figure 1 employed in a TLED having a total length of 60cm;
  • Fig. 2B and 2C show the different coverage of the antenna with a selected directivity.
  • Figs. 3A-3E show, in more detail, the simulation results for the embodiment of Fig. 1 employed in a TLED having a total length of 60cm;
  • Fig. 4 shows simulation results for a collinear antenna according to an embodiment when employed in a TLED having a total length of 120cm;
  • Figs. 5A and 5B show collinear antennas according to alternative embodiments having a total length of 60cm and 120cm, respectively;
  • Fig. 6 shows an exploded view of a tubular lighting device comprising an antenna according to an embodiment
  • Fig. 7 shows a collinear antenna according to another embodiment to be integrated in a tubular lamp
  • Fig. 8 shows a collinear antenna according to yet another embodiment to be integrated in a tubular lamp.
  • Proposed is a design of a collinear antenna that may be used inside a compact housing, such as a plastic or glass tubular housing of a tubular lighting device for example.
  • the proposed antenna includes two sets of components: radiation elements; and phase balancing elements, alternately arranged in series with each other.
  • the radiation elements may output a wireless signal at required frequency
  • the phase balancing elements may be designed so as to ensure that the phase of input signal at each radiation element will be the same value. Such an arrangement may provide maximum directivity of the antenna.
  • phase delay introduced by the phase balance elements may be modified using one or more phase adjusting elements.
  • the antenna may be self- adjusting.
  • embodiments are proposed wherein the antenna employs coil- based phase balancing elements, and wherein a phase adjustment arrangement is used to alter the effective number of turns in a coil of a phase balancing element.
  • a phase adjustment arrangement is used to alter the effective number of turns in a coil of a phase balancing element.
  • vertical means substantially orthogonal to the surface of a substrate.
  • lateral or horizontal means substantially parallel to the surface of a substrate.
  • terms describing positioning or locations are to be construed in conjunction with the orientation of the structures illustrated in the diagrams.
  • the series collinear antenna 10 comprises: first 12 to fourth 18 radiating elements connected in series and oriented along a longitudinal direction L.
  • each radiating element comprises a line radiator of length 86.5mm.
  • the line radiators are elongated and thus able to fit inside lighting devices with compact cross- sections, such as tubular lighting devices.
  • other forms of radiating element (or 'radiators') may also be employed.
  • a coil arrangement 20 Between each pair of adjacent radiating elements is connected a coil arrangement 20.
  • a first coil arrangement 20 A is connected between the first 12 and second 14 radiating elements
  • a second coil arrangement 20B is connected between the second 14 and third 16 radiating elements
  • a third coil arrangement 20C is connected between the third 16 and fourth 18 radiating elements.
  • Each coil arrangement is adapted to introduce a phase delay to radiation from an immediately preceding connected radiating element before feeding the radiation to the immediately following connected radiating element.
  • a phase adjustment circuit is coupled to each of the coil arrangements and adapted to modify the phase delay introduced by the coil arrangements.
  • the second coil arrangement 20B comprises a single coil 24 of steel wire connected between the second 14 and third 16 radiating elements.
  • the spiral length of the coil 24 is 11.5mm and the spiral diameter is 25mm (which is substantially equal to the diameter of a TLED that the antenna 10 is designed for).
  • the phase adjustment circuit comprises a switch arrangement having a switch 26 connected between each turn of the coil 24. In this way, each switch 26 is adapted to selectively short circuit a respective turn of the coil 24 (for example, in response to a control signal).
  • the suppression of radiation caused by the second coil arrangement 20B can be altered through the use of a phase adjustment arrangement to alter the effective number of turns of the coil 24.
  • the phase delay caused by the coil 24, and in turn the radiation pattern, and more specifically the directivity/antenna diversity, of the antenna 10 can be changed.
  • the phase delay introduced between the second 14 and third 16 radiating elements can be changed by changing the number of turns of the coil 24 connected between the second 14 and third 16 radiating elements.
  • simple switches 26 are employed, although other suitable arrangements for altering the phase delay introduced by the coil arrangements may be employed.
  • FIG. 2A there are depicted simulation results for the embodiment of Figure 1 employed in a TLED.
  • a phase adjustment arrangement can modify the phase delay introduced by a coil arrangement, thereby modifying an angle between the longitudinal direction L and the radiation pattern of the collinear antenna 10.
  • the simulation results shown in Figure 2A demonstrate how the angle between the longitudinal direction L and the radiation pattern of the collinear antenna 10 can be changed based on the number of turns of a coil.
  • the radiation pattern changes based on the number of turns, and the value changed is the angle between radiation pattern and longitudinal axis L of the TLED (and the antenna).
  • These differing angles will result in differing directions of wireless coverage for the antenna 10. More specifically, if there is only one turn (other turns are shorted), the antenna pattern shows that the main direction is near 20 degrees and 60 degrees. If there are two turns (other turns are shorted), the antenna pattern noted by the dashed line shows that the main directions are near 0 and 180 degrees.
  • the antenna pattern noted by the dotted line shows the main direction deviates from those of two turns, and is at 45 degrees and 135 degrees. If there are four turns, the antenna pattern noted by the dashed-dotted line shows the main direction at 15 degrees, 165 degrees, and 90 degrees. If there are five turns, the antenna pattern noted by the heavy solid line shows the main directions at 0 degrees, 60 degrees, 120 degrees and 180 degrees.
  • Figure 2B and Figure 2C shows the different coverage of an antenna according to an embodiment with a selected directivity.
  • the dark spot 50 is the antenna's position, and the dashed line 55 depicts its associated coverage.
  • the coverage 55 is a long oval shape intended to cover more distance in the horizontal direction; while in fig. 2C, the coverage 55 is a rectangular shape intended to cover both the horizontal and the vertical directions.
  • Figures 3A-3D show, in more detail, the simulation results for the embodiment of Figure 1 employed in a TLED of length 60cm.
  • a simplified diagram of an exemplary collinear antenna having a length of 60cm is also depicted in Figure 5A
  • Figure 3A shows the simulation results for when the coils are arranged to have on turn (i.e. when the switch arrangement is controlled to create one effective/operational turn in each coil arrangement).
  • Figure 3B shows the simulation results for when the coils are arranged to have two turns (i.e. when the switch arrangement is controlled to create two effective/operational turns in each coil arrangement).
  • Figure 3C shows the simulation results for when the coils are arranged to have three turns (i.e. when the switch arrangement is controlled to create three
  • Figure 3D shows the simulation results for when the coils are arranged to have four turns (i.e. when the switch arrangement is controlled to create four effective/operational turns in each coil arrangement).
  • Figure 3E shows the simulation results for when the coils are arranged to have five turns (i.e. when the switch arrangement is controlled to create five effective/operational turns in each coil arrangement).
  • FIG 4 there are shown simulation results for a collinear antenna according to an embodiment when employed in a TLED of length 120cm.
  • a simplified diagram of an exemplary collinear antenna having a length of 120cm is also depicted in Figure 5B.
  • the collinear antenna comprises more radiating elements than the embodiment of Figure 1.
  • the simulation employed a collinear antenna similar to that depicted in Figure 1 , but comprising nine line radiators connected in series and oriented along the longitudinal length of the TLED.
  • a coil arrangement is connected between each pair of adjacent line radiators.
  • a phase adjustment circuit is employed to modify the phase delay introduced by the coil arrangements. More specifically, the phase adjustment circuit is adapted to modify the effective number of turns in each of the coil arrangements.
  • the number of turns in each phase adjusting element need not be limited to being the same number.
  • different phase adjusting elements (e.g. coils) of the same collinear antenna may have differing numbers of coil turns.
  • the number of turns in the different phase adjusting elements of an antenna may be different (and may, for example, depend on manufacturing error and/or real application requirements).
  • an antenna according to another embodiment can be a Planar Inverted F Antenna (PIFA) (comprising of a rectangular planar element located above a ground plane, a short circuiting plate or pin, and a feeding mechanism for the planar element).
  • PIFA Planar Inverted F Antenna
  • embodiments may provide a series collinear antenna suitable for reliable communication of RF signals across a range of directivities/antenna diversity.
  • the series collinear antenna may be designed with compact dimensions (so as to fit within predetermined housing dimensions, for example) and may provide an adjustment functionality wherein the phase delay introduced by a coil-based inter-element phasing section of the series collinear antenna may be modified.
  • a series collinear antenna can be designed with dimensions that enable its use within a tubular lighting device, such as a smart TLED which can be remote controlled, e.g. with respect to such as on/off, intensity, color, beam width, and light orientation.
  • a tubular lighting device such as a smart TLED which can be remote controlled, e.g. with respect to such as on/off, intensity, color, beam width, and light orientation.
  • FIG. 6 depicts an exploded view of a tubular lighting device 100 comprising an antenna according to an embodiment.
  • the tubular lighting device 100 comprises: a tubular housing 102 that is elongated in a longitudinal direction L.
  • Light emitting elements 104 are mounted on a printed circuit board (PCB) 106 within the tubular housing 102.
  • a driver module 108 is also provided in the tubular housing 102 and electrically connected to the PCB 106 for providing control signals to the PCB 106 (for controlling the light emitting elements 104.
  • a Radio Frequency (RF) control module 110 is also provide din the tubular housing 102 and electrically connected to the driver module 108 for
  • RF Radio Frequency
  • the RF control module 110 is electrically connected to a series collinear antenna 112 according to an embodiment, the series collinear antenna 112 thus providing for the communication of RF signals to/from the RF control module 110.
  • the antenna 112 comprises first 114 to third
  • first 114 and second 116 radiation elements Connected between the first 114 and second 116 radiation elements is a first phase adjusting coil 120 having a diameter that is substantially equal to that of the tubular housing 102. Similarly, connected between the second 116 and third 118 radiation elements is a second phase adjusting coil 122 having a diameter that is substantially equal to that of the tubular housing 102.
  • An output port of the RF control module 110 is connected to the first radiation element 114.
  • Each coil 120,122 is made from high hardness metal so they can be positioned and fixed in the housing 102 and welded to their respective radiation elements.
  • each coil 120,122 is a respective switching arrangement
  • Each switching arrangement 124,126 comprises a plurality of switches adapted to modify a number of turns of the respective coil 120,122.
  • the first switching arrangement 124 is provided for the first phase adjusting coil 120, wherein the first switching arrangement 124 comprises a plurality of switches adapted to selectively short circuit turns of the first phase adjusting coil 120 so as to alter the effective number of turns of the first phase adjusting coil 120.
  • the second switching arrangement 126 is provided for the second phase adjusting coil 122, wherein the second switching arrangement 126 comprises a plurality of switches adapted to selectively short circuit turns of the second phase adjusting coil 122 so as to alter the effective number of turns of the second phase adjusting coil 122.
  • the switches are fixed and welded to the respective phase adjusting coils 120,122 underneath the PCB 106, thereby minimizing any influence on the antenna's performance. Also, this arrangement enables a control line to be easily connected to the phase adjusting switches from the PCB 106.
  • the TLED may be placed in anechoic chamber, and the phasing adjusting switches controlled by high and low voltage level. With different voltage level configurations, all possible radiation patterns may then be measured and made to corresponded to configuration words. Then, during use, a required radiation pattern may be achieved by using the associated configuration word. Also, improved adaptation to a real-world environment, the phase configuration words may be implemented and, for each configuration word, the coverage point will receive the wireless signal until it receives a maximum signal level.
  • embodiments may be applicable to smart TLEDS. However, embodiments may also be applicable to other types of smart lighting devices. Such applicability to smart lighting devices may make proposed embodiments useful for a wide range of applications.
  • the radiating elements may be provided on an elongated substrate that is curved about a longitudinal axis extending in the longitudinal direction.
  • the first and second radiating elements may be printed on the substrate (using established printing techniques, including 3D printing for example), and electrical contacts may be provided at the ends of the radiating elements.
  • an antenna according to an embodiment may be provided in a form which enables it to be inserted in housing of compact cross-section, such as tubular housing. After insertion, the contacts may enable connection of the coil arrangement in a simple manner, assisting the manufacture process of a device (such as a smart lighting device for example)
  • the tubular housing may comprise a housing portion formed from an elongated substrate that is curved about the longitudinal axis, and the radiating elements may be provided on the housing portion.
  • the radiating elements may thus be provided on the curved housing portion, and this curved housing portion may form at least part of the upper or lower part of the tubular lighting device.
  • the radiating elements may be provided on the inner surface of the lens part of a TLED.
  • components of the antenna may be integrated with the lighting device so as to maximize use of the available space within the device.
  • Fig. 7 shows another embodiment of the collinear antenna by using a different implementation of the phase balance arrangement.
  • the phase balance arrangement is implemented by tracks.
  • the phase adjustment circuit comprises at least one switch placed aside the track and adapted to short circuit a portion of the track thereby tuning an effective length of the meandered track between the radiating elements. This track can also be called as a phase stub in the field of RF.
  • the track is a half closed meandered track.
  • the track is a completely closed track, as shown in fig. 8.
  • This antenna with radiating element and the phase balance tracks could be manufactured only on level 2 PCB of TLED, as printed wires. All the switches are easier to be welded and assembled on the level 2 PCB. And there will be no need to use second assembling and 3D printing technology to manufacture the antenna and phase adjusting element, as discussed in the above embodiment in figure 6.
  • Embodiments may thus be employed in conjunction with new or existing lamps.
  • an embodiment may be retro-fitted to a conventional lamp, whereas another embodiment may be integrated into a new lamp at time of manufacture.
  • an aspect of the invention may provide a lamp comprising a lighting device according to an embodiment.
  • Embodiments may be employed in the field of building lighting, stadium lighting, home/residential lighting, temporary lighting, and other fields/applications where remotely controllable lighting is desirable.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne un dispositif d'éclairage tubulaire. Un dispositif d'éclairage tubulaire, comprenant : un boîtier tubulaire (102) qui est allongé dans une direction longitudinale; des éléments électroluminescents (104) à l'intérieur du boîtier tubulaire; et une antenne colinéaire en série. L'antenne colinéaire en série comprend des premier et second éléments rayonnants connectés en série et orientés le long de la direction longitudinale. L'antenne comprend également un agencement d'équilibrage de phase connecté entre les premier et second éléments rayonnants, l'agencement d'équilibrage de phase étant conçu pour introduire un retard de phase au rayonnement provenant du premier élément rayonnant avant d'acheminer le rayonnement vers le second élément rayonnant. Un circuit de réglage de phase est couplé à l'agencement d'équilibrage de phase et conçu pour modifier le retard de phase. L'antenne colinéaire en série est utilisée dans le dispositif d'éclairage tubulaire pour la communication de signaux RF. L'agencement d'équilibrage de phase est par exemple une bobine, ou une piste.
PCT/EP2017/075056 2016-10-08 2017-10-03 Dispositif d'éclairage tubulaire comprenant une antenne colinéaire en série WO2018065404A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CNPCT/CN2016/101508 2016-10-08
CN2016101508 2016-10-08
EP16196956 2016-11-02
EP16196956.3 2016-11-02

Publications (1)

Publication Number Publication Date
WO2018065404A1 true WO2018065404A1 (fr) 2018-04-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11095041B2 (en) * 2018-02-28 2021-08-17 Norsat International Inc. Collinear antenna assembly and series-fed omnidirectional collinear antenna array
US11325690B1 (en) 2020-10-19 2022-05-10 Rockwell Collins, Inc. Integrated aircraft antenna and light assemblies

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1411588A1 (fr) 2002-10-17 2004-04-21 RF Industries Pty. Ltd. Antenne à large bande
US20080079640A1 (en) 2006-10-02 2008-04-03 Airgain, Inc. Compact multi-element antenna with phase shift
WO2016066564A1 (fr) 2014-10-27 2016-05-06 Philips Lighting Holding B.V. Dispositif de lampe à tube à led sans fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1411588A1 (fr) 2002-10-17 2004-04-21 RF Industries Pty. Ltd. Antenne à large bande
US20080079640A1 (en) 2006-10-02 2008-04-03 Airgain, Inc. Compact multi-element antenna with phase shift
WO2016066564A1 (fr) 2014-10-27 2016-05-06 Philips Lighting Holding B.V. Dispositif de lampe à tube à led sans fil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11095041B2 (en) * 2018-02-28 2021-08-17 Norsat International Inc. Collinear antenna assembly and series-fed omnidirectional collinear antenna array
US11325690B1 (en) 2020-10-19 2022-05-10 Rockwell Collins, Inc. Integrated aircraft antenna and light assemblies

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