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  Patent History
  • Application
    AU 19990033017D 1999-02-19
  • Publication
    AU 3301799 1999-09-06

published patent: Light emitting diode dot matrix display system with audio output

TitleLight emitting diode dot matrix display system with audio output
Priority Date1998-02-20 US 09/075478P
1998-02-20 US 09/075456P
1999-02-19 PCT/US1999003560
Inventors
Issue Date1999
Citation
Australia Published Patent Application AU 3301799. Australia: IP Australia, 1999 How to Cite?
AbstractA dot matrix display system made up of light emitting diodes (LEDs), in which one or more LEDs (50) are modulated and encoded with audio information or messages, is disclosed. The system has a LED dot matrix display panel with an interface circuit to a computer, an audio signal transmitter (200), and a receiver (300). An executive program runs on the computer for the visual display control of characters, decorative pattern or messages on the display panel. The receiver combined with a speaker (80) is located at a distance from the display panel. The receiver (300) is designed to demodulate the optically transmitted audio information and broadcast the messages with the speaker (80). The modulation of the LEDs (50) includes a voltage-controlled oscillator (VCO) for varying the frequency of on/off periods of said light emitting diodes. The frequency is high enough such that the perceivable light appears to be constantly illuminated to the human eye.
Persistent Identifierhttp://hdl.handle.net/10722/176553

 

DC FieldValueLanguage
dc.date.accessioned2012-11-30T08:38:07Z-
dc.date.available2012-11-30T08:38:07Z-
dc.date.issued1999-
dc.identifier.citationAustralia Published Patent Application AU 3301799. Australia: IP Australia, 1999en_HK
dc.identifier.urihttp://hdl.handle.net/10722/176553-
dc.description.abstractA dot matrix display system made up of light emitting diodes (LEDs), in which one or more LEDs (50) are modulated and encoded with audio information or messages, is disclosed. The system has a LED dot matrix display panel with an interface circuit to a computer, an audio signal transmitter (200), and a receiver (300). An executive program runs on the computer for the visual display control of characters, decorative pattern or messages on the display panel. The receiver combined with a speaker (80) is located at a distance from the display panel. The receiver (300) is designed to demodulate the optically transmitted audio information and broadcast the messages with the speaker (80). The modulation of the LEDs (50) includes a voltage-controlled oscillator (VCO) for varying the frequency of on/off periods of said light emitting diodes. The frequency is high enough such that the perceivable light appears to be constantly illuminated to the human eye.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License For Public Patent Documentsen_US
dc.titleLight emitting diode dot matrix display system with audio outputen_HK
dc.typePatenten_US
dc.contributor.inventorYang, ESen_HK
dc.contributor.inventorPang, GKHen_HK
dc.contributor.inventorChris Sun-Kin Yeungen_HK
dc.contributor.inventorDavid Yangen_HK
dc.contributor.inventorMichael King-Ming Hongen_HK
dc.contributor.inventorTo-On Kwanen_HK
dc.contributor.inventorChi-Ho Chanen_HK
dc.contributor.inventorKa-Lim Hoen_HK
dc.contributor.inventorLawrence Ming-Him Koen_HK
patents.identifier.applicationAU 19990033017Den_HK
patents.description.assigneeUNIV HONG KONG; EDWARD S YANGen_HK
patents.description.countryAustraliaen_HK
patents.date.publication1999-09-06en_HK
patents.date.application1999-02-19en_HK
patents.date.priority1998-02-20 US 09/075478Pen_HK
patents.date.priority1998-02-20 US 09/075456Pen_HK
patents.date.priority1999-02-19 PCT/US1999003560en_HK
patents.description.ccAUen_HK
patents.identifier.publicationAU 3301799en_HK
patents.relation.familyAU 3301799 (A) 1999-09-06en_HK
patents.relation.familyUS 6445369 (B1) 2002-09-03en_HK
patents.relation.familyWO 9942984 (A1) 1999-08-26en_HK
patents.description.kindAen_HK
patents.typePatent_publisheden_HK

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