Digital bit image memory system
First Claim
Patent Images
1. A bit image memory for use with a visual display comprising in combination:
- a semiconductor memory, said memory having at least one digital storage location for each elemental display position upon said visual display; and
means for reading out data from said memory to produce an image upon said visual display, said reading-out means being coupled to address inputs and data outputs of said memory, said memory being refreshed within the refresh time period of said visual display means.
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Abstract
A digital bit image memory system especially adapted for use in a newspaper-type composition and display system. At least one digital storage location is provided for each elemental display position. The memory system is formed with plural rows and columns of random access memory devices which are arranged and continually addressed to simultaneously refresh the display and maintain the stored data.
49 Citations
19 Claims
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1. A bit image memory for use with a visual display comprising in combination:
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a semiconductor memory, said memory having at least one digital storage location for each elemental display position upon said visual display; and means for reading out data from said memory to produce an image upon said visual display, said reading-out means being coupled to address inputs and data outputs of said memory, said memory being refreshed within the refresh time period of said visual display means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A bit image memory system for refreshng one or more raster scanned visual display devices comprising in combination:
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a plurality of random access memory devices, said devices being arranged in a plurality of rows and columns; a first plurality of shift registers, one or more inputs of each shift register of said first plurality of shift registers being coupled to data outputs of said random access memory devices for receiving data read out from one of said columns of memory devices; a second plurality of shift registers, one or more inputs of each shift register of said second plurality of shift registers being coupled to outputs of at least two of said first plurality of shift registers for receiving data from said first plurality of shift registers; means for shifting data out of said shift registers of said second plurality of shift registers one of said shift registers of said second plurality of shift registers at a time; and means for summing the outputs of said shift registers of said second plurality of shift registers. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A digital data display system comprising in combination:
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means for producing digital signals representing character patterns; means for producing digital signals representing line patterns; a plurality of display means; a plurality of memory modules for storing data in response to said digital signals representing said character and line patterns, two of said memory modules being provided for storing said character and line patterns for each of said display means; means for reading data out of said memory modules, said reading-out means being coupled to data outputs of said memory modules; and means for converting the read-out data from said memory modules to a video signal for operating said display means. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification