Light Emitting Diode Dot Matrix Display System With Audio Output
A Dot Matrix Display System Made Up Of Light Emitting Diodes (Led's), N Which One Or More Leds 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, And A Receiver. 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 Is Located At A Distance From The Display Panel. The Receiver Is Designed To Demodulate The Optically Transmitted Audio Information And Broadcast The Messages With The Speaker. The Modulation Of The Leds 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.
Patent Number: AU199933017A
Application Number: AU199933017D
Inventor: YANG EDWARD S | PANG GRANTHAM KWOK-HUNG | YEUNG CHRIS SUN-KIN | YANG DAVID | HONG MICHAEL KING-MING | KWAN TO-ON | CHAN CHI-HO | HO KA-LIM | KO LAWRENCE MING-HIM
Priority Date: 20 Feb 1998
Priority Number: AU199933017A
Application Date: 19 Feb 1999
Publication Date: 6 Sep 1999
IPC Current: G06F0003147 | H04B0010155 | H04R002700
Assignee Applicant: The University of Hong Kong
Title: Light emitting diode dot matrix display system with audio output
Usefulness: Light emitting diode dot matrix display system with audio output
Summary: For transmitting audio information e.g. used by shops, cinemas, banks for advertizing etc.
Novelty: Light emitting diode matrix display system for transmitting audio information e.g. used by shops for advertizing etc.
Electronics
Display
Hong Kong
