Video circuit including a digital-to-analog converter in the monitor which converts the digital data to analog currents before conversion to analog voltages
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United States of America Patent
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-
Mar 20, 1990
Grant Date -
N/A
app pub date -
Sep 9, 1983
filing date -
Sep 9, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for processing video data to be displayed comprises a controller and a monitor. The controller includes a memory for storing the digital data to be displayed and apparatus for sequentially reading data from the memory. The data from the controller is conducted in digital form to the separately housed monitor separated from the controller. In the monitor, the digital data is converted into analog form and displayed. In the converting process, the digital data is first converted to an analog current and then the analog current is converted to a voltage. An additional voltage-to-voltage conversion may occur to isolate the capacitance of the display device. This system is particularly suited for high resolution systems (greater than 1000.times.1000 pixels) in which a new pixel is refreshed at least every 10 nanoseconds.
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