Ionographic beam positioning and crosstalk correction using grey

Details Ionographic beam positioning and crosstalk correction using grey Ionographic beam positioning and crosstalk correction using grey

1991-06-21

1993-12-14

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346159, B41J 239

Patent

active

052707296

ABSTRACT:
The Ionographic Beam Positioning And Crosstalk Correction Using Grey Levels is a method and apparatus which solves the problem of poor density and definition of an image formed by an ion current (20) projected from an ionographic print head (10), caused by electric field crosstalk between adjacent modulation electrodes (22) in the head (10). By applying a partial modulation voltage (V.sub.M ') to the adjacent modulation electrodes (22), the density of an individual pixel charge is increased and the pixel charge is "addressed" or deflected to a position on a receptor surface (26) more precise than the pitch dimension between modulation electrodes (22). A data processor (46) intercepts printing driver commands (44) and constructs therefrom values of partial modulation voltage (V.sub.M ') by means of an algorithm making deliberate use of the crosstalk phenomenon. The algorithm is pre-defined with respect to image-dependent modulation voltage states and implemented as programmed software or firmware. The partial modulation voltage (V.sub.M ') is applied to correlated modulation electrodes (22) in response to the printing driver commands (44), by a controller (50) using modified printing commands (48) to produce a corrected image.

REFERENCES:
patent: 4463363 (1984-07-01), Gundlach et al.
patent: 4524371 (1985-06-01), Sheridon et al.
patent: 4644373 (1987-02-01), Sheridon et al.
patent: 4719481 (1988-01-01), Tuan et al.
patent: 4727388 (1988-02-01), Sheridon et al.
patent: 4794412 (1988-12-01), Casey et al.
patent: 4799071 (1989-01-01), Zeise et al.
patent: 4879194 (1989-11-01), Snelling
patent: 4972212 (1990-11-01), Hauser et al.
patent: 4973994 (1990-11-01), Schneider
patent: 4996425 (1991-02-01), Hauser et al.
patent: 5003327 (1991-03-01), Theodoulou et al.
patent: 5087933 (1993-02-01), Stearns
N. K. Sheridon, "Practical Air Assisted Ionographic Printing", Proceedings, SPIE-The International Society For Optical Engineering, vol. 1252, Feb. 13-14, 1990.

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