G - Physics – 09 – G
Patent
G - Physics
09
G
375/22
G09G 1/00 (2006.01) G09G 1/28 (2006.01)
Patent
CA 1205225
Abstract A preconverged color display station 13 is disclosed which is compatible with a computer controlled control unit 11 that provides electrical convergence control signals. Compatibility is obtained by causing the control unit 11 to transmit the electrical convergence signals to the screen storage memory RAM (random access memory) 24, 25, 26 which normally stores information defining the character and character attributes to be visually provided by the display station CRT screen. The stored convergence signals are read back to the control unit 11 from the screen RAM. After all of the convergence signals have been received by the display station and prior to the transmission of character and character attribute information signals to the screen RAM, the contents of the screen RAM is erased. Subsequently, the contents of the screen RAM, which now contains character display information signals, is read out and utilized to define a visual display on a CRT 14. During the time that the screen RAM contains electrical convergence signals, the video of the CRT is blanked. Selection of any of at least three basic colors is provided by the color display station whether or not electrical convergence control signals are provided thereto and whether or not a monochrome or multicolor control unit is coupled thereto.
430738
Krause James J.
Thayer David J.
Welk John R.
Gowling Lafleur Henderson Llp
Motorola Inc.
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