Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1980-04-01
1982-07-20
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340721, 340749, 358113, 358208, G09G 300
Patent
active
043408885
ABSTRACT:
A scan linearization device for use in a system that produces graphic images by means of nonlinear scanning elements which produce a multiplicity of scanning lines by scanning an array of emitters. The device introduces externally generated digitally coded signals representative of a desired image by quantizing a scanning line into a discrete number of periods and energizing appropriate emitters during each of such periods. An electrical scan waveform is picked off from the scanning elements and contains the nonlinearities. A staircase waveform is generated having equal amplitude steps and is compared to the scan waveform. When the amplitude of the scan waveform exceeds the amplitude of a step, the next step is generated resulting in a non-uniform temporal spacing of the amplitude steps complementary to the nonlinearities of the scan. The emitters are sequentially energized by each step such that the scan nonlinearities are compensated and an undistorted graphic image is produced.
REFERENCES:
patent: 3704342 (1972-11-01), Stoddard et al.
patent: 3809976 (1974-04-01), Gard
patent: 3846784 (1974-11-01), Sinclair
patent: 4129887 (1978-12-01), Michon
patent: 4189747 (1980-02-01), Funari
patent: 4213146 (1980-07-01), Maiman
Chin Gay
Curtis Marshall M.
Martin Marietta Corporation
Renfro Julian C.
Wiggins Macdonald J.
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