(19)
(11) EP 0 708 399 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.05.1996 Bulletin 1996/19

(43) Date of publication A2:
24.04.1996 Bulletin 1996/17

(21) Application number: 95306412.8

(22) Date of filing: 13.09.1995
(51) International Patent Classification (IPC)6: G06F 3/14, G09G 1/16
(84) Designated Contracting States:
DE FR GB

(30) Priority: 14.10.1994 GB 9420712

(71) Applicant: International Business Machines Corporation
Armonk, N.Y. 10504 (US)

(72) Inventors:
  • Eagle, David
    Kilmacolm, Renfrewshire (GB)
  • Knox, Andrew
    Kilbirnie, KA25 7JZ (GB)
  • Huggins, Mark
    Wemyss Bay, Renfrewshire, PA18 6BD (GB)
  • Madine, Anthony
    Linburn, Eskine (GB)

(74) Representative: Williams, Julian David 
IBM United Kingdom Limited, Intellectual Property Department, Hursley Park
Winchester, Hampshire SO21 2JN
Winchester, Hampshire SO21 2JN (GB)

   


(54) Apparatus for adding a display data channel to existing display


(57) Apparatus for adding a display data channel to a display device (100) comprises a memory (520) for storing display identification data. An I/O connector (104) is releasably connectable to a display output port of a personal computer for receiving display drive signals from the display output port. First communication means (501-505) transfers the display drive signals to the display device. Second communication means (Clock, Data) communicates the display identification data stored in the memory to the personal computer via the I/O connector. Power receiving means (+5V) receives electrical power to power the second communication means independently of the display device.






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