Computer graphics processing and selective visual display system – Data responsive crt display control
Patent
1993-02-02
1995-10-10
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Data responsive crt display control
345127, 345132, 345212, 348473, G09G 102
Patent
active
054574730
ABSTRACT:
An image display apparatus capable of adjusting a display picture by an input unit through a computer body is disclosed. When the user inputs a control instruction for adjusting the display picture of the display unit by the input unit connected to the computer body, a control signal addition circuit prepares a control signal Sc corresponding to the control instruction and adds the control signal to a video signal R, G or B or a synchronizing signal Hs or Vs produced by a display control circuit during a vertical retrace period. A control signal separation circuit separates the added control signal Sc from the video signal R, G or B or the synchronizing signal Hs or Vs produced by the control signal addition circuit. A display control circuit produces adjustment signals Sa and Sb on the basis of the control signal from the control signal separation circuit to adjust a video circuit and a deflection circuit. Thus, the user can adjust the display picture by the input unit near at hand without extending the hands to adjustment switches of the display unit.
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Arai Ikuya
Kitou Kouji
Sano Yuji
Hitachi , Ltd.
Hjerpe Richard A.
Saras Steven J.
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