EP2247167A2 - Procédé de détermination d'un type de lampe à décharge et appareil électrique monté en amont destiné au fonctionnement d'au moins deux types différents de lampes à décharge - Google Patents

Procédé de détermination d'un type de lampe à décharge et appareil électrique monté en amont destiné au fonctionnement d'au moins deux types différents de lampes à décharge Download PDF

Info

Publication number
EP2247167A2
EP2247167A2 EP10160067A EP10160067A EP2247167A2 EP 2247167 A2 EP2247167 A2 EP 2247167A2 EP 10160067 A EP10160067 A EP 10160067A EP 10160067 A EP10160067 A EP 10160067A EP 2247167 A2 EP2247167 A2 EP 2247167A2
Authority
EP
European Patent Office
Prior art keywords
lamp
preheating
mess
gas discharge
lamp type
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.)
Withdrawn
Application number
EP10160067A
Other languages
German (de)
English (en)
Other versions
EP2247167A3 (fr
Inventor
Siegfried Mayer
Christof Schwarzfisher
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2247167A2 publication Critical patent/EP2247167A2/fr
Publication of EP2247167A3 publication Critical patent/EP2247167A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/295—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling

Definitions

  • the present invention relates to a method for determining a type of gas discharge lamp by means of an electronic ballast for operating different types of gas discharge lamps, wherein the different types of gas discharge lamps differ in at least one operating parameter, the method comprising the steps of: preheating at least one coil of the Gas discharge lamp for a predetermined preheat time, measuring a physical quantity characteristic of the type of the gas discharge lamp at the end of the preheat time and providing the measured value of that magnitude, and determining the lamp type from the provided measurement value.
  • the invention also relates to a corresponding electronic ballast for operating at least two different types of gas discharge lamps.
  • Electronic ballasts are known, which are suitable for the operation of different types of gas discharge lamps, in particular for the operation of different types of low-pressure discharge lamps.
  • Such devices are referred to as multi-lamp devices or as intelligent electronic ballasts.
  • operating parameters are stored for the types of lamps that can be operated with this device.
  • different types of lamps differ in the lamp current required for their operation.
  • the device selects the operating parameters to be used depending on the type of the connected lamp. For this it must first recognize the lamp type.
  • a part of the currently known devices detects the lamp type by evaluating the cold resistance of a filament of the lamp at each start.
  • the heat resistance of a lamp filament can also be evaluated at the end of the preheating phase.
  • it can lead to error detection. If the lamp type is changed, then the Vortexparametersatz still used by the previous lamp is used for the newly connected lamp, so that it is not preheated optimally. This can lead to the determined value for the heat resistance of the coil being within a range that can not be clearly assigned to a lamp type. This can lead to error detection.
  • a lamp is operated with incorrect parameter values, it may not ignite properly or the lamp life will be shortened.
  • the object of the present invention is therefore to develop an aforementioned method and an aforementioned electronic ballast in such a way error detection of the lamp type can be avoided.
  • the present invention is based on the finding that this object can be achieved if the duration of preheating is prolonged.
  • the preheating time is extended by a predetermined period of time and a renewed determination of the lamp type is carried out at the end of the extended preheating time. It has been found that then there is an unambiguous assignability of the determined value for the heat resistance of the lamp filament to a lamp type, if the preheating time is chosen to be sufficiently long.
  • the manufacturers of electronic ballasts for gas discharge lamps strive to keep the preheating time as short as possible in order to avoid that between the switching on and the ignition of the lamp a noticeable pause for the user.
  • a preheating time which is preferably less than or equal to one second for preheating the set lamp type, and extending the preheating time only in those cases where unambiguous identification is not possible ,
  • the method further comprises the step of storing the determined lamp type.
  • the method also particularly preferably comprises the steps to be carried out at the start of the method of reading the stored lamp type and determining the predetermined preheating time as a function of the read-out type of lamp based on a stored in the electronic ballast between types of gas discharge lamps to be operated with the electronic ballast and associated operating parameters ,
  • a lamp type is stored at the factory, which is used to determine the operating parameters to be used for the first preheating. Storing the determined lamp type is only required if this differs from the already stored lamp type.
  • the physical quantity characteristic of the type of gas discharge lamp is the value of a value related to the electrical resistance of the preheated coil.
  • the duration of the extended preheating time is preferably selected such that the measured value provided is located in a nearly stationary area.
  • the heat resistance of the coil increases with the preheat time and asymptotically approaches a limit.
  • the curve behavior in the steeply increasing range depends on the age of the coil, while the influence of the age of the coil in the stationary region of the curve is negligible.
  • the lamp type is determined on the basis of the provided measured value by comparing the provided measured value with a table of values, then checking whether the provided measured value falls within a range of the table of values unambiguously attributable to a lamp type, and finally at unique assignability of the provided measured value to a lamp type of this lamp type is selected as the determined lamp type.
  • different value tables are used for different operating parameters used in the preheating of the at least one helix. This also helps to increase the reliability of the lamp detection.
  • Fig. 1 shows a schematic representation of an embodiment of an electronic ballast according to the invention.
  • This comprises an input with a first input terminal E1 and a second input terminal E2, between which a mains voltage U N is applied.
  • the input E1 and E2 are followed by a rectifier GL, which is designed to rectify the mains voltage U N.
  • a power-factor correction circuit PFC is provided, which up-regulates the rectified voltage to a constant value and ensures a sinusoidal current drain from the grid.
  • a half-bridge circuit is coupled to a first half-bridge switch S1 and a second half-bridge switch S2.
  • a connected to the electronic ballast to be operated gas discharge lamp La load circuit is connected.
  • This comprises a series resonant circuit which is composed of a choke coil L D and a resonant capacitor C R coupled between a first output terminal A1 and ground.
  • a gas discharge lamp La to be operated with the electronic ballast is coupled.
  • This in Fig. 1 embodiment shown represents an electronic ballast for operating a gas discharge lamp.
  • the second output terminal A2 is also coupled via a coupling capacitor C K1 to ground.
  • a second coupling capacitor C K2 Between the high potential terminal of the switch S1 and the second output terminal A2 may optionally be provided a second coupling capacitor C K2 , which is indicated in the figure by dashed lines.
  • the present invention relates to a preheating device of the electronic ballast, which serves to preheat at least one and preferably both coils W1 and W2 of the gas discharge lamp La.
  • the preheater has for this purpose a heating transformer with a primary winding TP and two secondary windings TS1 and TS2.
  • the primary winding TR is connected via a switch S3 and a trapezoidal capacitor C T to the output of the half-bridge between the two switches S1 and S2.
  • the first secondary winding TS1 is coupled to the first lamp filament W1, while the second secondary winding TS2 is coupled to the second lamp winding W2.
  • the other end of the primary winding TP is for detecting a current flowing through the primary winding TP TP current I which is proportional to the current flowing through the secondary windings and through the lamp filaments streams connected to a measuring circuit 20th
  • the measuring circuit 20 includes a shunt resistor and provides at its output derived from this voltage U mess .
  • This voltage U mess is supplied to an input ME1 of a microcontroller 10.
  • the microcontroller 10 also has outputs MA1, MA2 and MA3, via which it controls the switches S1 and S2 of the half-bridge and the switch S3, via which the heating device is coupled to the half-bridge.
  • Fig. 1 also shows a memory 12 of the microcontroller 10 for storing data required for the operation of the gas discharge lamp La.
  • the memory 12 is part of the microcontroller 10. Instead of a memory but could also be provided more memory, which could be arranged outside the microcontroller. If the intention is to operate several lamps of the same type simultaneously with the electronic ballast, the heating transformer comprises four instead of two secondary windings in the case of a device designed for the operation of two lamps. In the case of devices designed to operate more than two lamps, a heating transformer with one primary winding and one secondary winding for each coil to be heated is provided in each case for two lamps, the primary windings of the heating transformers being connected in parallel.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP10160067.4A 2009-04-30 2010-04-15 Procédé de détermination d'un type de lampe à décharge et appareil électrique monté en amont destiné au fonctionnement d'au moins deux types différents de lampes à décharge Withdrawn EP2247167A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009019625.0A DE102009019625B4 (de) 2009-04-30 2009-04-30 Verfahren zum Ermitteln eines Typs einer Gasentladungslampe und elektronisches Vorschaltgerät zum Betreiben von mindestens zwei unterschiedlichen Typen von Gasentladungslampen

Publications (2)

Publication Number Publication Date
EP2247167A2 true EP2247167A2 (fr) 2010-11-03
EP2247167A3 EP2247167A3 (fr) 2014-11-12

Family

ID=42338162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160067.4A Withdrawn EP2247167A3 (fr) 2009-04-30 2010-04-15 Procédé de détermination d'un type de lampe à décharge et appareil électrique monté en amont destiné au fonctionnement d'au moins deux types différents de lampes à décharge

Country Status (5)

Country Link
US (1) US8754652B2 (fr)
EP (1) EP2247167A3 (fr)
KR (1) KR20100119524A (fr)
CN (1) CN101877927B (fr)
DE (1) DE102009019625B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102595747B (zh) * 2012-02-05 2014-03-12 浙江大学 基于数字控制电子镇流器的荧光灯灯类型识别方法及数字通用电子镇流器
JP6391997B2 (ja) * 2014-06-06 2018-09-19 株式会社オーク製作所 発信機を備えた放電ランプおよびその光源装置
KR101672538B1 (ko) * 2015-04-22 2016-11-04 주식회사 미성포리테크 전·자기식 안정기 호환형 구동 회로 및 그 구동 회로를 포함한 led 형광등
CN113219293B (zh) * 2021-07-08 2022-03-18 深圳市爱图仕影像器材有限公司 光学附件检测电路及照明设备

Family Cites Families (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489823A (en) * 1978-03-20 1996-02-06 Nilssen; Ole K. Electronic ballast for gas discharge lamp
US5841241A (en) * 1982-01-25 1998-11-24 Ole K. Nilssen Electronic ballast for fluorescent lamps
US4503361A (en) * 1982-02-02 1985-03-05 Intent Patent A.G. Electronic ballast system
US4730163A (en) * 1985-03-13 1988-03-08 Santos Luis S Device for testing high-pressure lamps and components used therewith
DE3530638A1 (de) * 1985-08-28 1987-03-05 Philips Patentverwaltung Schaltungsanordnung zum starten und betrieb von gasentladungslampen
DE3729383A1 (de) * 1987-09-03 1989-03-16 Philips Patentverwaltung Schaltungsanordnung zum starten einer hochdruckgasentladungslampe
US4792727A (en) * 1987-10-05 1988-12-20 Gte Products Corporation System and method for operating a discharge lamp to obtain positive volt-ampere characteristic
US4989127A (en) * 1989-05-09 1991-01-29 North American Philips Corporation Driver for high voltage half-bridge circuits
JPH0766864B2 (ja) * 1989-07-28 1995-07-19 東芝ライテック株式会社 放電灯点灯装置
US5130611A (en) * 1991-01-16 1992-07-14 Intent Patents A.G. Universal electronic ballast system
US5148087A (en) * 1991-05-28 1992-09-15 Motorola, Inc. Circuit for driving a gas discharge lamp load
DE4329821A1 (de) * 1993-09-03 1995-03-09 Tridonic Bauelemente Ges Mbh Elektronisches Vorschaltgerät zum Versorgen einer Last, beispielsweise einer Lampe
US5394062A (en) * 1993-12-15 1995-02-28 General Electric Company Lamp ballast circuit with overload detection and ballast operability indication features
US5424611A (en) * 1993-12-22 1995-06-13 At&T Corp. Method for pre-heating a gas-discharge lamp
US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same
US5569984A (en) * 1994-12-28 1996-10-29 Philips Electronics North America Corporation Method and controller for detecting arc instabilities in gas discharge lamps
DE19546588A1 (de) * 1995-12-13 1997-06-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren und Schaltungsanordnung zum Betrieb einer Entladungslampe
US5804926A (en) * 1996-04-08 1998-09-08 Raytheon Company Lighting circuit that includes a comparison of a "flattened" sinewave to a full wave rectified sinewave for control
US5801492A (en) * 1996-05-30 1998-09-01 Bobel; Andrzej Electronic ballast for gas discharge lamp having primary and auxiliary resonant circuits
US5859504A (en) * 1996-10-01 1999-01-12 General Electric Company Lamp ballast circuit with cathode preheat function
DE19708783C1 (de) * 1997-03-04 1998-10-08 Tridonic Bauelemente Verfahren und Vorrichtung zum Regeln des Betriebsverhaltens von Gasentladungslampen
DK1042942T3 (da) * 1997-07-24 2002-12-02 Noontek Ltd Elektronisk ballast til en gasudladningslampe
US5959408A (en) * 1997-08-07 1999-09-28 Magnetek, Inc. Symmetry control circuit for pre-heating in electronic ballasts
US5952794A (en) * 1997-10-02 1999-09-14 Phillips Electronics North America Corportion Method of sampling an electrical lamp parameter for detecting arc instabilities
SE520653C2 (sv) * 1998-02-18 2003-08-05 Pls Systems I Hestra Ab Anordning för användning vid drift av en eller flera urladdningslampor
US6160361A (en) * 1998-07-29 2000-12-12 Philips Electronics North America Corporation For improvements in a lamp type recognition scheme
US6169375B1 (en) * 1998-10-16 2001-01-02 Electro-Mag International, Inc. Lamp adaptable ballast circuit
US6825620B2 (en) * 1999-06-21 2004-11-30 Access Business Group International Llc Inductively coupled ballast circuit
US6359387B1 (en) * 2000-08-31 2002-03-19 Philips Electronics North America Corporation Gas-discharge lamp type recognition based on built-in lamp electrical properties
DE10133515A1 (de) * 2001-07-10 2003-01-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betreiben einer Leuchtstofflampe
US6577078B2 (en) * 2001-09-26 2003-06-10 Koninklijke Philips Electronics N.V. Electronic ballast with lamp run-up current regulation
US6731075B2 (en) * 2001-11-02 2004-05-04 Ampr Llc Method and apparatus for lighting a discharge lamp
DE10200022A1 (de) * 2002-01-02 2003-07-17 Philips Intellectual Property Schaltungsanordnung zum Betrieb einer oder mehrerer Lampen
EP1477045B1 (fr) * 2002-02-19 2013-09-18 Access Business Group International LLC Ensemble demarreur pour lampe a decharge gazeuse
JP4000897B2 (ja) * 2002-04-30 2007-10-31 ウシオ電機株式会社 希ガス放電ランプの寿命予測方法、及び、希ガス放電ランプの寿命予測システム
DE10255737A1 (de) * 2002-11-28 2004-06-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Betrieb mindestens einer Niederdruckentladungslampe und Betriebsgerät für mindestens eine Niederdruckentladungslampe
DE10328718A1 (de) * 2003-06-25 2005-01-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Betrieb mindestens einer Niederdruckentladungslampe und Betriebsgerät für mindestens eine Niederdruckentladungslampe
DE10345610A1 (de) * 2003-09-29 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Niederdruckentladungslampe
US7109668B2 (en) * 2003-10-30 2006-09-19 I.E.P.C. Corp. Electronic lighting ballast
WO2005060320A1 (fr) * 2003-12-11 2005-06-30 Koninklijke Philips Electronics, N.V. Ballast electronique avec determination de type lampe
US6972570B2 (en) * 2004-02-11 2005-12-06 Schriefer Jay R Quick-connect ballast testing and monitoring method and apparatus
US7145342B2 (en) * 2004-07-07 2006-12-05 Access Business Group International Llc System and method for automated filament testing of gas discharge lamps
US7199528B2 (en) * 2005-04-21 2007-04-03 Energy Conservation Technologies, Inc. Control circuit for maintaining constant power in power factor corrected electronic ballasts and power supplies
US7183714B1 (en) * 2005-06-30 2007-02-27 Osram Sylvania, Inc. Ballast with relamping circuitry
DE102006045907A1 (de) * 2006-09-28 2008-04-03 Infineon Technologies Austria Ag Verfahren und Vorrichtung zur Überwachung des Betriebs einer Gasentladungslampe
US7560867B2 (en) 2006-10-17 2009-07-14 Access Business Group International, Llc Starter for a gas discharge light source
DE102007047142A1 (de) * 2007-10-02 2009-04-09 Tridonicatco Gmbh & Co. Kg Verfahren zum Erkennen des Typs einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie elektronisches Vorschaltgerät
TWI382788B (zh) * 2008-09-08 2013-01-11 Ind Tech Res Inst 高強度氣體放電燈之安定器驅動控制方法及其系統

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
KR20100119524A (ko) 2010-11-09
CN101877927B (zh) 2014-11-26
DE102009019625B4 (de) 2014-05-15
EP2247167A3 (fr) 2014-11-12
CN101877927A (zh) 2010-11-03
US20100277178A1 (en) 2010-11-04
DE102009019625A1 (de) 2010-11-25
US8754652B2 (en) 2014-06-17

Similar Documents

Publication Publication Date Title
EP1103165B1 (fr) Ballast electronique destine a au moins une lampe a decharge basse tension
EP1519638B1 (fr) Méthode pour commander une lampe à décharge basse pression
EP0876742B1 (fr) Procede et circuit de commande electronique pour la regulation des caracteristiques de fonctionnement de lampes a decharge
DE102009019625B4 (de) Verfahren zum Ermitteln eines Typs einer Gasentladungslampe und elektronisches Vorschaltgerät zum Betreiben von mindestens zwei unterschiedlichen Typen von Gasentladungslampen
DE102008027029A1 (de) Lampentyperkennung durch Leistungsfaktorkorrekturschaltung
DE19708791A1 (de) Steuerschaltung und elektronisches Vorschaltgerät mit einer derartigen Steuerschaltung
EP1920642B1 (fr) Ballast pour une lampe a decharge a prechauffage adaptatif
EP2248395B1 (fr) Identification du type d'une lampe à décharge destinée à fonctionner avec un ballast électronique
DE3338464C2 (de) Schaltungsanordnung zum Betrieb mindestens einer Leuchtstofflampe mit einstellbarer Helligkeit an einem selbstschwingenden Wechselrichter
DE102007047142A1 (de) Verfahren zum Erkennen des Typs einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie elektronisches Vorschaltgerät
EP2248397B1 (fr) Système d'éclairage et procédé destiné à contrôler si au moins deux lampes à décharge gazeuse destinées à fonctionner avec un ballast électronique sont du même type
EP1492393A1 (fr) Circuit et méthode pour alimenter une lampe à décharge muni d'une détection de fin de durée de vie
EP1276355B1 (fr) Circuit ballast pour determiner la puissance de préchauffage
EP2198672B1 (fr) Procédé pour déterminer des paramètres de fonctionnement d'une lampe à décharge de gaz fonctionnant avec un ballast électronique, et ballast correspondant
EP1045619A1 (fr) Procédé de calibration des paramètres d'opération d'un ballast pour lampe
EP2274960B1 (fr) Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge
EP2132965B1 (fr) Circuit pour le chauffage d'un filament
DE19613257A1 (de) Verfahren und elektronische Steuerschaltung zum Regeln des Betriebsverhaltens von Gasentladungslampen
EP1920643B1 (fr) Ballast pour une lampe a decharge a prechauffage adaptatif
AT518402B1 (de) Schaltungsanordnung zum Betreiben einer Entladungslampe
EP2468078B1 (fr) Ballast électronique et procédé pour faire fonctionner au moins une lampe à décharge
DE102008012454A1 (de) Verfahren zum Bestimmen von Betriebsparametern einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie ein entsprechendes Vorschaltgerät
DE10129453A1 (de) Elektronisches Vorschaltgerät
DE102010029475A1 (de) Verfahren und Betriebsvorrichtung zum Betreiben von Entladungslampen unterschiedlichen Lampentyps

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA ME RS

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OSRAM AG

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OSRAM GMBH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OSRAM GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA ME RS

RIC1 Information provided on ipc code assigned before grant

Ipc: H05B 41/36 20060101AFI20141006BHEP

Ipc: H05B 41/295 20060101ALI20141006BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150513