CN1943283A - Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase - Google Patents

Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase Download PDF

Info

Publication number
CN1943283A
CN1943283A CNA2005800111554A CN200580011155A CN1943283A CN 1943283 A CN1943283 A CN 1943283A CN A2005800111554 A CNA2005800111554 A CN A2005800111554A CN 200580011155 A CN200580011155 A CN 200580011155A CN 1943283 A CN1943283 A CN 1943283A
Authority
CN
China
Prior art keywords
lamp
ignition
circuit arrangement
total duration
under
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.)
Granted
Application number
CNA2005800111554A
Other languages
Chinese (zh)
Other versions
CN1943283B (en
Inventor
罗马·普罗纳
凯·阿尔宾爵
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.)
Tridonicatco GmbH and Co KG
Original Assignee
Tridonicatco GmbH and Co KG
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 Tridonicatco GmbH and Co KG filed Critical Tridonicatco GmbH and Co KG
Publication of CN1943283A publication Critical patent/CN1943283A/en
Application granted granted Critical
Publication of CN1943283B publication Critical patent/CN1943283B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02Details
    • H05B41/04Starting switches
    • H05B41/042Starting switches using semiconductor devices
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/26Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28Circuit 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
    • H05B41/288Circuit 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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2925Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20Responsive to malfunctions or to light source life; for protection

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention relates to a circuit arrangement for striking a gas discharge lamp (LA), comprising a timer circuit (4), embodied to monitor the striking of the lamp (LA), during a starting phase and, should the lamp (LA) not be struck within a given total striking time, to prevent further striking attempts. According to the invention, means for storing (5) the information as to whether the last lamp start was successful are provided, whereby said information is available for carrying out a further lamp start and the total striking time is preferably dependent on the information provided in the means for storage (2).

Description

The circuit arrangement and the method that are used for the gaseous discharge lamp igniting to have time restriction the startup stage
Technical field
The present invention relates to a kind of being used for to circuit arrangement according to the igniting of the gaseous discharge lamp of claim 1 preamble.
Background technology
Starting point of the present invention is such as from the applicant's EP 847 680A1 and known ballast.This known ballast has the so-called intelligent timer of supervisory lamp startup and lamp ignition process.
The start-up course of this timer supervisory lamp always can't successfully be attempted out of order gaseous discharge lamp igniting to avoid ballast.Utilize this known ballast, pre-determine fixing total duration of ignition, for example 20 minutes.If, that is to say, if can not be successfully to this gaseous discharge lamp igniting in 20 minutes through also not success after this total duration of ignition, so, the disrupt further ignition process, and entire circuit transfers so-called sleep pattern to, in this sleep pattern, can not control this lamp further.Yet, executing particularly and can begin new lamp automatically and start by after closing and open restarting that main power voltage initiates.
The disrupt further igniting attempts bringing such advantage after finishing total duration of ignition, and promptly other electronic components of gaseous discharge lamp and this circuit can not attempted and additionally be damaged owing to further lighting a fire.In addition, this method has also been brought advantage economically, and this is because finally by being avoided further igniting to attempt having saved energy.
Summary of the invention
Now, the objective of the invention is, realize further improving can realize that optimum lamp starts from known ballast.Particularly to avoid after execution is restarted, control the aforementioned lamp that still has fault for a long time unsuccessfully.
Circuit arrangement by having claim 1 feature and reach this purpose according to the method for the operating gas discharge lamps of claim 11.Further developing that the present invention is useful is the theme of dependent claims.
As situation of the prior art, if still unsuccessful after finishing total duration of ignition, this circuit arrangement transfers sleep pattern to, that is to say the trial of further not lighting a fire.Yet,, this lamp is not had the information stores of successfully startup in memory element now according to the present invention.Both can also can realize this storage with software with hardware.For example, execute restart after, circuit arrangement just can obtain this information, so that this circuit arrangement can react in suitable mode.
Can use the information that last lamp starts does not have success with multiple mode.For example, under simple situation about changing, this circuit arrangement has indicator component, such as form with LED, this indicator component externally the last lamp of indication start do not have successfully and thereby circuit arrangement be in the information of sleep pattern.Like this, concerning the electrician, the lamp that can see which ballast place simply is to change.
Yet, according to particularly preferred exemplary embodiment of the present invention, do not have under the case of successful in last lamp startup, during the lamp again after restarting starts, reduce total duration of ignition significantly.Especially, can select like this this total duration of ignition: can be reliably to the normal lamp igniting of situation.For example, it is contemplated that selected for 10 seconds time as the total duration of ignition that shortens.Under the situation that does not have to realize lamp is lighted a fire in this short duration of ignition, then this circuit arrangement enters sleep pattern once more early, and this is because this has the igniting of success to attempt it can be inferred, does not still change this out of order lamp.Yet, if successfully carried out the lamp startup, delete the information that last lamp starts does not have success, this is owing to thinking the replacing of having carried out lamp.
Advantage according to process mode of the present invention is, after reopening main power voltage, the only relatively short time to the control of the lamp of possible breakdown so that save energy on the one hand, avoid on the other hand since high voltage ignition pulses to of the extra infringement of this lamp with the element that is connected with this lamp.Should it but be sufficiently long the time simultaneously, so that necessarily can be to the normal new lamp igniting of situation.So, improving under the energy-conservation situation, increase the reliability of operation.
Description of drawings
Illustrate in greater detail the present invention below with reference to accompanying drawings.Wherein show:
Fig. 1, have the electric ballast of the circuit arrangement that disposes according to the present invention, be used for starting and gaseous discharge lamp being lighted a fire; With
Fig. 2, the flow chart that is used to illustrate process of the present invention.
Embodiment
Fig. 1 shows the electric ballast that provides with label 1 in the whole text, and this ballast is configured to control and operating gas discharge lamps LA.At input side, ballast 1 has and is used for the terminal that is connected with the total current source; At the outlet side of ballast, be provided with the ignition installation 3 of configuration according to the present invention, be responsible for carrying out the igniting of lamp startup and gaseous discharge lamp LA.Whole operations of ballast 1 are by control unit 2 monitoring that are connected with ignition installation 3.Simple in order to illustrate, omitted other elements of ballast 1, for example provide to be used for a main power voltage U 0Be converted to lamp and operate the element of necessary voltage.The configuration that moves these elements has been known, does not need here to explain in more detail.
Ignition installation 3 is configured to the order of response control unit 2 and carries out the lamp startup, particularly lamp LA is lighted a fire.The type that depends on lamp can brought before the lamp LA igniting by applying high-tension pulse, here the coil of heating lamp at first.
Usually can be in the very short time the available new lamp of igniting.For example, be 10 to 15 seconds during this period of time, at this moment between in lamp also can in so-called cold start-up scope, be lighted a fire, in cold start-up, need not the preheating of real-time lamp line circle.On the contrary, because aging phenomenon, older lamp can not be lighted a fire sometimes at once, so the trial of may must lighting a fire several times to the last successfully starts lamp.
Yet,,, can not realize that also successful lamp starts even after repeatedly igniting is attempted if the lamp LA that is connected on the ballast 1 is out of order.But, because the high-voltage pulse that applies continuously from ignition installation 3 will cause the extra infringement to lamp LA and the electronic component that is connected, in addition, also consumed energy unnecessarily, therefore ignition installation 3 has timer circuit 4, and its task is the duration of monitoring startup/ignition phase.Usually, after starting the trial beginning, ignition gas discharge lamp LA was removed in the longest trial in 20 minutes.Yet if there is not to realize igniting in so-called total duration of ignition, timer circuit 4 notice ignition installations finish for 3 total durations of ignition.Respond this notice, ignition installation 3 is no longer further lighted a fire and is attempted going forward side by side into sleep pattern.Under this sleep pattern, other elements of control unit 2 and electric ballast 1 also are in sleep pattern, minimum current drain only occurs, so finally saved energy.
Now, the normal mode of process is, identify enter sleep pattern after, change gaseous discharge lamp LA, carry out restarting of ballast 1 then, short time turn off current source U in restarting 0, and then open.This is discerned by control unit 2, and makes response and come corresponding information is passed to ignition installation 3, carries out new lamp by ignition installation 3 and starts.
Yet, may occur that now, promptly under the situation of not changing out of order lamp LA in advance, carried out current source U 0Restart.In the case, ignition installation 3 will be attempted 20 fens clock times again and start lamp, and this will bring unnecessary energy consumption.
For fear of this misdeed, have memory element 5 in addition according to ignition installation 3 provided by the invention, wherein store about last startup trial and success whether information.Memory element 5 can be for the element of form of software configuration or also can be element with the example, in hardware stored information.
Can use the information that comprises in the memory element 5 in various manners.
Under easy configuration, whether successful the information in the memory element promptly start information about last lamp, outwards indicated, so that the attendant can identify whether need to change lamp simply.Under the situation of exemplary embodiment shown in Figure 1, the form with LED 6 provides indicator component for this reason, this element be disposed in ballast 1 outer shell the outside and link to each other with ignition installation 3.Start not success if memory element 5 is expressed last lamp, this will indicate by LED 6.The electrician can identify in simple mode can judge that lamp LA has fault, thereby should be replaced.
The useful especially possibility that use is contained in the information in the memory element 5 is, relies on this information and select the total duration of ignition that need determine under the situation that new lamp starts.As in this introduces explain, determine that usually 20 fens clock times carry out the startup of lamp.Yet, if carried out now current source voltage restart and memory element in the last lamp of information representation start not success, two kinds of possibilities can appear so.On the one hand, this is restarted may be not change in advance under the situation of out of order lamp LA, involuntary carrying out.In the case, will in 20 minutes time, be not intended to the free burial ground for the destitute and attempt deactivation lamp LA again.In addition, this also will bring unnecessary energy consumption.Yet if lamp LA has been replaced by new lamp, be oversize total duration of ignition of 20 minutes equally, because can start new lamp in the time of much shorter.
Correspondingly, the particularly preferred distortion according to the present invention when lamp starts beginning, is determined total duration of ignition according to the information that comprises in the memory element 5.For example, be successful if the last lamp of memory element 5 indications starts, under common mode, be defined as 20 minutes total duration of ignition.Yet, if be provided with so-called startup interrupt identification, that is,, memory element 5 starts not success if expressing last lamp, so, under the situation of new startup, determine total duration of ignition of much shorter.Preferably, can be set for this reason 10 to 15 seconds time, this is for concerning new lamp LA igniting, and is enough and safe and reliable, yet on the other hand, this also is enough short, to avoid unnecessary energy consumption under the situation of attempting the out of order lamp of startup.Now, if in the total duration of ignition that shortens, successfully realized the lamp startup, can know that lamp LA has been replaced by inference and now memory element 5 preserve the information that realizes that successfully lamp starts.So deletion starts interrupt identification again.Under the situation of restart procedure, correspondingly be set long total duration of ignition of 20 minutes once more.
Schematically process mode according to the present invention is summarized among Fig. 2.First step after beginning 10 promptly enters the light source operation, is present in as (step 11) in the deletion memory contents of default setting.When beginning, there is available lamp like this.
(step 12), notice ballast will be carried out lamp and be started by opening current source.In following step 13, determine total duration of ignition based on the information that comprises in the memory element 5.Explain as top, start successfully or start under the deleted situation of interrupt identification at last lamp, select long total duration of ignition, and opposite be, start not success and correspondingly be set under the situation that starts interrupt identification total duration of ignition that setting is short at last lamp.
In following step 14, if suitably, will attempt carrying out lamp repeatedly to light a fire and start, thus, in step 15, in the time period of total duration of ignition, carry out the monitoring of whether having been lighted a fire continuously about lamp.If lamp is lighted a fire, then become normal lamp operation (step 16).Simultaneously, the startup interrupt identification that deletion may be provided with in the memory element 5, it is identical to become the duration of ignition of growing under this expression and the next startup situation; That is to say, under the situation that the lamp that restarts starts, is set the long time.
On the contrary,, do not have and in total duration of ignition, to start lamp, omit further igniting and attempt, and ballast is converted to the sleep pattern (step 17) that only has minimum current drain to take place if in step 13.The startup interrupt identification is set in memory element 5 simultaneously, and this is illustrated in the startup trial that restarts and selects the short duration of ignition.
Because initial current source is closed, realize now restarting, restart the lamp startup (step 18) that automatic initiation restarts by this.Then, ballast identifies reopening of current source and this is opened thinks enabling signal, thus, if be fit to, then again from step 12, to carry out the lamp startup the total duration of ignition that changes once more.
By according to the solution of the present invention, can guarantee the out of order lamp of trial deactivation of avoiding unnecessary.In energy-conservation, can also avoid suffering possible infringement.
Whether successful storage start information about last lamp, except that stored information itself, also provides such advantage, and promptly the user can identify whether must carry out the replacing of lamp in mode simply.Thereby should be noted that, be not definitely the information of last igniting success also must to be stored in the memory element.Finally, as mentioned above, under the case of successful certain sign or so-called label to be set lighting a fire, and under the case of successful of lighting a fire again, delete this sign again.In addition, should also be noted that the present invention does not rely on the type of employed ignition installation.For example, according to the present invention, can dispose stack ignition installation and pulse firing equipment in the same way.

Claims (18)

1, a kind of circuit arrangement that is used for the igniting of gaseous discharge lamp (LA), has timer circuit (4), this timer circuit be constituted as the startup stage and can not be at this lamp (LA) by under the situation of lighting a fire in predetermined total duration of ignition, monitor the igniting of this lamp (LA), to prevent that further igniting is attempted, it is characterized in that
Whether successful comprise being used to store about last lamp starting equipment (5), thus, this information can be used when the lamp startup that restarts.
2, circuit arrangement according to claim 1 is characterized in that,
By depending on the information that is stored in this equipment that is used for storing (2) this total duration of ignition of this timer circuit (4) monitoring.
3, circuit arrangement according to claim 2 is characterized in that,
Under this last lamp starts not case of successful, reduce this total duration of ignition.
4, circuit arrangement according to claim 3 is characterized in that,
Under the situation that aforementioned not successful lamp starts, be about 10 seconds this total duration of ignition.
5, according to claim 3 or 4 described circuit arrangements, it is characterized in that,
Start under the case of successful at this last lamp, be about 20 minutes this total duration of ignition.
6, circuit arrangement according to claim 3 is characterized in that,
This equipment that is used to store is provided by electronic memory (3), and this equipment is related with this circuit arrangement (2) or be connected with it.
7, according to the circuit arrangement of any aforementioned claim, it is characterized in that,
Comprise the equipment (6) that is used for indicating the information that is stored in this equipment that is used to store (2).
8, circuit arrangement according to claim 7 is characterized in that:
This equipment that is used to indicate is formed by supervisory lamp (6).
9, according to the circuit arrangement of any aforementioned claim, it is characterized in that,
Comprise the current source (U that is used to monitor this circuit arrangement 0) equipment, this equipment is constituted as when closing and reopening this current source initiates lamp and starts.
10, a kind of electric ballast that is used for the operation of gaseous discharge lamp (LA) has the equipment that is used for this lamp of operation (LA) under this igniting situation, and the circuit arrangement that is used for starting according to any aforementioned claim this lamp (LA).
11, the method for a kind of operating gas discharge lamps (LA), wherein, the startup stage, this lamp (LA) is lighted a fire repeatedly, and under the situation that this lamp (LA) was not successfully lighted a fire in predetermined total duration of ignition, the trial of no longer further lighting a fire, it is characterized in that
This information starts about last lamp whether successful information is stored, so that under the situation that the lamp that restarts starts, can be used.
12, method according to claim 11 is characterized in that,
Depend on whether this last lamp starts successful this total duration of ignition.
13, method according to claim 12 is characterized in that,
If this lamp starts not success, reduce this total duration of ignition.
14, method according to claim 13 is characterized in that,
Under the situation that aforementioned not successful lamp starts, be about 10 seconds this total duration of ignition.
15, according to claim 13 or 14 described methods, it is characterized in that,
Start under the case of successful at this last lamp, be about 20 minutes this total duration of ignition.
16, according to method any in the claim 11 to 15, it is characterized in that,
Start about this last lamp whether successful information is instructed to.
17, method according to claim 16 is characterized in that,
This information is indicated by light signal.
18, according to method any in the claim 11 to 17, it is characterized in that,
Under the situation of the current source of closing and reopen this lamp (LA), the lamp startup is automatically performed.
CN2005800111554A 2004-04-15 2005-02-02 Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase Expired - Fee Related CN1943283B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004018345A DE102004018345A1 (en) 2004-04-15 2004-04-15 Circuit arrangement and method for igniting a gas discharge lamp with a time-limited starting phase
DE102004018345.7 2004-04-15
PCT/EP2005/001035 WO2005109965A1 (en) 2004-04-15 2005-02-02 Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase

Publications (2)

Publication Number Publication Date
CN1943283A true CN1943283A (en) 2007-04-04
CN1943283B CN1943283B (en) 2010-09-22

Family

ID=34960753

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2005800111554A Expired - Fee Related CN1943283B (en) 2004-04-15 2005-02-02 Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase

Country Status (6)

Country Link
EP (1) EP1736038B1 (en)
CN (1) CN1943283B (en)
AT (1) ATE392793T1 (en)
DE (2) DE102004018345A1 (en)
ES (1) ES2304687T3 (en)
WO (1) WO2005109965A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018296A1 (en) * 2006-04-20 2007-10-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Arrangement and method for operating a high-pressure discharge lamp
WO2009019647A1 (en) * 2007-08-07 2009-02-12 Koninklijke Philips Electronics N.V. Control of ignition of a gas discharge lamp
CN101978790A (en) * 2008-03-19 2011-02-16 皇家飞利浦电子股份有限公司 End-of-life protection circuit for high-intensity discharge lamp
JP4973672B2 (en) * 2009-02-16 2012-07-11 セイコーエプソン株式会社 Discharge lamp driving device and driving method, light source device, projector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949018A (en) * 1987-11-06 1990-08-14 Unicorn Electric Products High pressure sodium lamp starter controller
US5103137A (en) * 1990-04-02 1992-04-07 Multipoint Control Systems, Inc. Anti-cycling device for high pressure sodium lamps
ATE194749T1 (en) * 1994-04-15 2000-07-15 Knobel Lichttech BALLAST WITH LAMP CHANGE DETECTION FOR DISCHARGE LAMPS
DE19531623B4 (en) * 1995-08-28 2010-09-23 Tridonicatco Gmbh & Co. Kg Method and circuit arrangement for igniting a high-pressure gas discharge lamp
US5801494A (en) * 1996-05-21 1998-09-01 Cooper Industries, Inc. Rapid restrike with integral cutout timer
IL123029A (en) * 1998-01-22 2003-02-12 Jbp Technologies Ltd Method and device for operating electronic ballasts for high intensity discharge (hid) lamps
EP1227706B1 (en) * 2001-01-24 2012-11-28 City University of Hong Kong Novel circuit designs and control techniques for high frequency electronic ballasts for high intensity discharge lamps

Also Published As

Publication number Publication date
EP1736038A1 (en) 2006-12-27
ES2304687T3 (en) 2008-10-16
DE102004018345A1 (en) 2005-11-03
ATE392793T1 (en) 2008-05-15
CN1943283B (en) 2010-09-22
DE502005003745D1 (en) 2008-05-29
WO2005109965A1 (en) 2005-11-17
EP1736038B1 (en) 2008-04-16

Similar Documents

Publication Publication Date Title
US6617805B2 (en) Ballast control IC with power factor correction
US6160362A (en) Ignition scheme for a high intensity discharge lamp
KR100375851B1 (en) Ballast for a discharge lamp
CN1943283B (en) Circuit arrangement and method for striking a gas discharge lamp with a time-limited starting phase
GB2203302A (en) Start, hot restart and operating circuit for an HIO lamp
CN101742791B (en) High-voltage discharge lamp ballast, lighting device and lighting system
EP1687880A2 (en) Anti-cycling control system for luminaires
CN1463567A (en) Automatic cycling control for HID lamps
JP4063667B2 (en) Lamp driving circuit and lamp driving method
JP2010525537A (en) Drive device for gas discharge lamp
EP1472912B1 (en) Device and method for controlling a gas discharge lamp, and lighting system with gas discharge lamp and control device
KR20100098666A (en) Method and igniter for igniting a gas discharge lamp
JP2007234540A (en) High-pressure discharge lamp lighting device, and lighting system
JP2003203790A (en) Discharge lamp lighting device
CN101356860A (en) Method for the detection of a fault during the operation of high-pressure discharge lamps on ballasts
KR200279408Y1 (en) Fluorescent lamp starter
JP2000021586A (en) Discharge lamp lighting device
US2938145A (en) Ballast for mercury vapor lamps
JP3026989B2 (en) High pressure discharge lamp lighting device with instantaneous restart
JPH04215538A (en) Electric discharge lighting device
JP4011660B2 (en) Discharge lamp lighting device
KR101357768B1 (en) Ballast for controlling dimming, ballast with dimming for protecting life of lamp and dimming control method including lamp life protection
JPH03119699A (en) Fluorescent lamp lighting device
JP2001068280A (en) Start control method for discharge lamp stabilizer
JP2008251377A (en) Discharge lamp lighting circuit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100922

Termination date: 20150202

EXPY Termination of patent right or utility model