Non-impact printer apparatus for grey level printing

Details Non-impact printer apparatus for grey level printing Non-impact printer apparatus for grey level printing

1989-12-18

1992-06-23

Fuller, Benjamin R.

Recorders

Light or beam recording

Including record receiver or handling means therefor

377114, G01D 942, H03K 2108

Patent

active

051247267

ABSTRACT:
In a non-impact printer apparatus, such as an LED printer, multiple bits of image data determining the on-time of each LED for generating a grey level pixel are latched into an appropriate data register from a data bus in accordance with a token bit that is passed along a shift register. The data register for each LED comprises a series of cascaded registers coupled as a ripple counter. Each of these registers stores a respective binary weighted data bit. In response to a clock signal at one of the clock inputs of one register the counter effectively counts down to a zero output condition and thereby directly controls LED enablement time.

REFERENCES:
patent: 3850517 (1974-11-01), Stephany et al.
patent: 4563693 (1986-01-01), Masaki
patent: 4596995 (1980-06-01), Yamakawa et al.
patent: 4731673 (1988-03-01), Yamakawa
patent: 4746941 (1988-05-01), Pham et al.
patent: 4831395 (1989-05-01), Pham et al.
patent: 4885597 (1989-12-01), Tscharg et al.
S. Madhu, Electronics: Circuits and Systems, 1985, pp. 768-771.

Affiliated with

Also associated with

Rating

Non-impact printer apparatus for grey level printing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-impact printer apparatus for grey level printing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-impact printer apparatus for grey level printing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-936307