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  Patent History
  • Application
    PC T/US1999003560 1999-02-19
  • Publication
    WO 9942984 1999-08-26

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
Inventors
Issue Date1999
Citation
WO Published patent application WO 9942984. World Intellectual Property Organization (WIPO), PatentScope, 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/10722/177167
References

 

DC FieldValueLanguage
dc.date.accessioned2012-11-30T08:39:17Z-
dc.date.available2012-11-30T08:39:17Z-
dc.date.issued1999-
dc.identifier.citationWO Published patent application WO 9942984. World Intellectual Property Organization (WIPO), PatentScope, 1999en_HK
dc.identifier.urihttp://hdl.handle.net/10722/177167-
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.relation.isreferencedbyUS 2009297146 (A1) 2009-12-03en_HK
dc.relation.isreferencedbyUS 8032030 (B2) 2011-10-04en_HK
dc.relation.isreferencedbyEP 1583392 (A1) 2005-10-05en_HK
dc.relation.isreferencedbyEP 1583392 (A4) 2008-12-03en_HK
dc.relation.isreferencedbyUS 6628203 (B1) 2003-09-30en_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.description.naturepublished_or_final_versionen_US
dc.contributor.inventorYang, ESen_HK
dc.contributor.inventorPang, GKHen_HK
dc.contributor.inventorYeung, Chris, Sun-Kinen_HK
dc.contributor.inventorYang, Daviden_HK
dc.contributor.inventorHong, Michael, King-Mingen_HK
dc.contributor.inventorKwan, To-Onen_HK
dc.contributor.inventorChan, Chi-Hoen_HK
dc.contributor.inventorHo, Ka-Limen_HK
dc.contributor.inventorKo, Lawrence, Ming-Himen_HK
patents.identifier.applicationPC T/US1999003560en_HK
patents.description.assigneeUNIV HONG KONG [CN]; YANG EDWARD S [US]en_HK
patents.description.countryWorld Intellectual Property Organization (WIPO)en_HK
patents.date.publication1999-08-26en_HK
dc.relation.referencesUS 5638052 (A) 1997-06-10en_HK
dc.relation.referencesUS 5561849 (A) 1996-10-01en_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.description.ccWOen_HK
patents.identifier.publicationWO 9942984en_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.kindA1en_HK
patents.typePatent_publisheden_HK

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