Test pattern signal generator

Details Test pattern signal generator Test pattern signal generator

1992-08-11

1994-06-07

Kostak, Victor R.

Television

Monitoring, testing, or measuring

Test signal generator

348578, H04N 1702

Patent

active

053194462

ABSTRACT:
A test pattern signal generator provides test patterns for a display unit. A horizontal counter counts dot clocks which correspond to display dots on the display unit respectively, and is cleared when the count value reaches the number of dot clocks in a horizontal period. A horizontal memory is addressed by the count value of the horizontal counter to output horizontal sync signal and test pattern data corresponding to each dot. A vertical counter counts clocks representing horizontal sync period outputted by the horizontal counter, and is cleared when the count value reaches the number of scan lines on a display. A vertical memory is addressed by the count value of the vertical counter to output vertical sync signal and test pattern data corresponding to each scan line. An output circuit produces a test pattern signal from outputs of the horizontal and vertical memories to provide it for the display unit.

REFERENCES:
patent: 4414567 (1983-11-01), Berke et al.
patent: 4855820 (1989-08-01), Wischermann et al.
patent: 5038210 (1991-08-01), Deckelmann et al.

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