HIGH RESOLUTION PULSE WIDTH MODULATION(PWM) FREQUENCY CONTROL USING A TUNABLE OSCILLATOR

A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine frequency change granularity to allow precise and smooth light dimming capabilities. Intermediate PWM signal frequencies between the frequencies th...

Full description

Saved in:
Bibliographic Details
Main Authors BOWLING STEPHEN, BARTLING JAMES, WOJEWODA IGOR
Format Patent
LanguageEnglish
Korean
Published 15.02.2012
Subjects
Online AccessGet full text

Cover

Loading…
Abstract A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine frequency change granularity to allow precise and smooth light dimming capabilities. Intermediate PWM signal frequencies between the frequencies that are normally generated from values in a period register of the PWM generator are provided with a variable frequency clock source to the PWM generator. Selection of each frequency from the plurality of frequencies available from the variable frequency clock source may be determined from a value stored in a variable frequency clock register. A microcontroller may be used to select appropriate frequencies for dimming control of the fluorescent lamp from the variable frequency clock source, and the period and duty cycle values used in generating the PWM signal at about a fifty percent duty cycle.
AbstractList A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine frequency change granularity to allow precise and smooth light dimming capabilities. Intermediate PWM signal frequencies between the frequencies that are normally generated from values in a period register of the PWM generator are provided with a variable frequency clock source to the PWM generator. Selection of each frequency from the plurality of frequencies available from the variable frequency clock source may be determined from a value stored in a variable frequency clock register. A microcontroller may be used to select appropriate frequencies for dimming control of the fluorescent lamp from the variable frequency clock source, and the period and duty cycle values used in generating the PWM signal at about a fifty percent duty cycle.
Author BARTLING JAMES
BOWLING STEPHEN
WOJEWODA IGOR
Author_xml – fullname: BOWLING STEPHEN
– fullname: BARTLING JAMES
– fullname: WOJEWODA IGOR
BookMark eNqNi7sKwjAUQDPo4OsfLrjoILTp5BjTtAmmuTUPqlMpEidpC_X_UcEPcDpwOGdJZv3QxwW5SlVKsMKhDl6hgTpoJ6BRuZdQYR40--pd3VR7KKy4BGH4DTgab1FDcMqUwMAHw05aADqu9GdBuybzR_ec4ubHFdkWwnN5iOPQxmns7rGPr_ZsaZLSJEmzY0ZZ9l_1Bi2DNCY
ContentType Patent
DBID EVB
DatabaseName esp@cenet
DatabaseTitleList
Database_xml – sequence: 1
  dbid: EVB
  name: esp@cenet
  url: http://worldwide.espacenet.com/singleLineSearch?locale=en_EP
  sourceTypes: Open Access Repository
DeliveryMethod fulltext_linktorsrc
Discipline Medicine
Chemistry
Sciences
ExternalDocumentID KR20120013932A
GroupedDBID EVB
ID FETCH-epo_espacenet_KR20120013932A3
IEDL.DBID EVB
IngestDate Fri Jul 19 15:13:54 EDT 2024
IsOpenAccess true
IsPeerReviewed false
IsScholarly false
Language English
Korean
LinkModel DirectLink
MergedId FETCHMERGED-epo_espacenet_KR20120013932A3
Notes Application Number: KR20117019872
OpenAccessLink https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20120215&DB=EPODOC&CC=KR&NR=20120013932A
ParticipantIDs epo_espacenet_KR20120013932A
PublicationCentury 2000
PublicationDate 20120215
PublicationDateYYYYMMDD 2012-02-15
PublicationDate_xml – month: 02
  year: 2012
  text: 20120215
  day: 15
PublicationDecade 2010
PublicationYear 2012
RelatedCompanies MICROCHIP TECHNOLOGY INC
RelatedCompanies_xml – name: MICROCHIP TECHNOLOGY INC
Score 2.8194258
Snippet A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine...
SourceID epo
SourceType Open Access Repository
SubjectTerms ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
Title HIGH RESOLUTION PULSE WIDTH MODULATION(PWM) FREQUENCY CONTROL USING A TUNABLE OSCILLATOR
URI https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20120215&DB=EPODOC&locale=&CC=KR&NR=20120013932A
hasFullText 1
inHoldings 1
isFullTextHit
isPrint
link http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV3dT8IwEL8gGvVNUeMHmiaaRR8W2QcbL8SMbmPIts6xCTwRRktiNEBkxn_fdoLyxFvbSy7tJdff9XofAHdaxs3wsVmTGaU1WVczVc4MTZFNNlE106QaZSLfOQgNL9WfB_VBCT7WuTBFndDvojgi16gJ1_e8uK8X_04su4itXD5mb3xp_uQmTVtavY4VVUCYZLeaTkRsgiWMm91YCuNfmjB3NNXagV1hSItK-85rS-SlLDZBxT2CvYjzm-XHUHqfV-AAr3uvVWA_WH158-FK-5YnMPA6bQ9xkRE_FZ4lFKV-z0H9jp14KCB26hcOp_uoHzwgN3ZeUifEQ4RJmMTER6LDRhtZKElDq-U7iPQwf8pbCYlP4dZ1EuzJfIujP4mMuvHmebQzKM_mM3YOyFCorjCTGtM61VWdNaaGxjhGK-PGxKCKfgHVbZwut5Ov4FBMRdCyUq9COf_8Ytcck_PsphDlD4e4h-Y
link.rule.ids 230,309,786,891,25594,76903
linkProvider European Patent Office
linkToHtml http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV3dT8IwEL8gGvFNUeMHahPNog-L7IONF2JGtzFkW-fcBJ8IoyUxGiAy479vO0F54q3pJZf2kuvv7nofADdaxs3wkVmXGaV1WVczVc4MTZFNNlY106QaZaLeOQgNL9UfB41BCT5WtTBFn9Dvojki16gx1_e8eK_n_0Esu8itXNxnb3xr9uAmLVtaeseKKiBMststJyI2wRLGrV4shfEvTZg7mmptwbbJncLCWXppi7qU-TqouPuwE3F-0_wASu-zKlTwavZaFXaD5Zc3Xy61b3EIA6_b8RAXGfFTEVlCUeo_O6jftRMPBcRO_SLgdBv1gzvkxs5T6oT4FWESJjHxkZiw0UEWStLQavsOIs-Yu_JWQuIjuHadBHsyP-LwTyLDXrx-H-0YytPZlJ0AMhSqK8ykxqRBdVVnzYmhMY7Ryqg5Nqiin0JtE6ezzeQrqHhJ4A_9btg7hz1BEgnMSqMG5fzzi11wfM6zy0KsPwfpitA
openUrl ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.title=HIGH+RESOLUTION+PULSE+WIDTH+MODULATION%28PWM%29+FREQUENCY+CONTROL+USING+A+TUNABLE+OSCILLATOR&rft.inventor=BOWLING+STEPHEN&rft.inventor=BARTLING+JAMES&rft.inventor=WOJEWODA+IGOR&rft.date=2012-02-15&rft.externalDBID=A&rft.externalDocID=KR20120013932A