Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1991-10-18
1993-09-21
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
324379, 324121R, 36443104, 364487, 345140, G09G 500
Patent
active
052472876
ABSTRACT:
A digital engine analyzer has an oscilloscope display and is controlled by microprocessors operating under menu-driven stored program control. The analyzer receives analog input signals from an engine being analyzed, digitizes the signals, captures the digital peak ignition voltage values for each cylinder and stores only these values for each cylinder over a number of successive engine cycles, and then simultaneously displays all the stored values for any one cylinder over a number of engine cycles to provide a historical display. Each peak value is stored twice and displayed twice to provide width to the value display and effectively produce a bar graph-type display.
REFERENCES:
patent: 4291383 (1981-09-01), Tedeschi et al.
patent: 4417467 (1983-11-01), Higgs et al.
patent: 4804921 (1989-02-01), Putrow et al.
Govekar Craig F.
Jonker Gary D.
Meeker Michael B.
Piehl James R.
Putrow Michael C.
Hjerpe Richard
Snap-on Tools Corporation
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