Resolution for a raster display

Details Resolution for a raster display Resolution for a raster display

1979-04-13

1981-02-10

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340745, 340750, 340800, G06F 314

Patent

active

042505020

ABSTRACT:
A circuit and method for displaying characters in a point matrix on a video screen raster with improved resolution utilizes first and second character generators each storing a portion of the character points to be displayed. Each character generator provides an input to an associated shift register, and the shift registers are controlled by complementary clock pulses so that the outputs are shifted by one-half of a bit representing a character point in the matrix. The outputs of the shift registers are combined in a mixer to provide a single output having twice the resolution power of conventional units but without increased band width.

REFERENCES:
patent: 3750135 (1973-07-01), Carey et al.
patent: 3821730 (1974-06-01), Carey et al.
patent: 4052719 (1977-10-01), Hutt et al.

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