SCANNING CONVERTER CAPABLE OF DISPLAYING DATA INDEPENDENTLY ONTO PLURAL DISPLAY DEVICES

PURPOSE:To attain an optional range and off-center selection at every display device by providing plural devices reading data from a frame memory and synchronizing signal generators for display devices and reading/displaying data independently from the frame memory according to a command from a cont...

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Bibliographic Details
Main Author OKI KENICHI
Format Patent
LanguageEnglish
Published 04.03.1988
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:PURPOSE:To attain an optional range and off-center selection at every display device by providing plural devices reading data from a frame memory and synchronizing signal generators for display devices and reading/displaying data independently from the frame memory according to a command from a control ler. CONSTITUTION:The data of the frame memory 1 is read by address designation by read address generators 11, 16, converted into an analog signal by D/A converters 10, 15 and fed to the display devices 7, 8 together with TV synchroniz ing signals 14, 19 as TV video signals 13, 18. The read address of the frame memory is generated from the TV synchronizing signal and the frame memory is scanned sequentially at every line. Since bus contention takes place if the two address generators 11, 16 select one memory, the phase of the synchronizing signals is changed for the display devices 7, 8. Thus, the display capable of the operation such as range changeover or off-center is applied independently to plural display devices.
Bibliography:Application Number: JP19860195988