LED illuminator bar for copier

Details LED illuminator bar for copier LED illuminator bar for copier

1988-10-05

1990-10-16

Moses, R. L.

Photocopying

Contact printing

Light boxes

355229, 355 70, 250553, 362800, G03G 2100

Patent

active

049639331

ABSTRACT:
An erase bar for a xerographic printer, copier or the like has a row of light emitting diodes for illuminating a row of pixels across the photosensitive medium of the printer. Each LED is located in the bottom of a cavity. Next to the bottom of the cavity are concave reflective walls which reflect light emitted transversely from the LED toward an open end of the cavity. Reflective walls of the cavity provide multiple bounces of some of the light. Absorptive walls nearer the open end of the cavity absorb some of the light. These features combine to illuminate a pixel of desired shape and with approximately uniform intensity of illumination. Additional uniformity may be provided by passing the illumination through a window that is at least partly absorbing for smoothing out differences in intensity.

REFERENCES:
patent: 4255042 (1981-03-01), Armitage et al.
patent: 4344691 (1982-08-01), Grant et al.
patent: 4435064 (1984-03-01), Tsukada et al.
patent: 4552447 (1985-11-01), Sagara et al.
patent: 4576464 (1986-03-01), Sakata et al.
patent: 4585330 (1986-04-01), Yamamoto et al.
patent: 4611906 (1986-09-01), Iwaki
patent: 4640601 (1987-02-01), DeGuchi et al.
patent: 4720729 (1988-01-01), Watanabe
patent: 4728982 (1988-03-01), Takemura
patent: 4734734 (1988-03-01), Yano
patent: 4759603 (1988-07-01), Jones
patent: 4767172 (1988-08-01), Nichols et al.
patent: 4794424 (1988-12-01), Higaki
patent: 4796052 (1989-01-01), Mizutani et al.
patent: 4814667 (1989-03-01), Tanaka
patent: 4837598 (1989-06-01), Nonami
patent: 4843427 (1989-06-01), Ibuchi
patent: 4928142 (1990-05-01), Kloosterman
Hewlett-Packard Drawing No. D-5180-6670-1.

Affiliated with

Also associated with

Rating

LED illuminator bar for copier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with LED illuminator bar for copier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LED illuminator bar for copier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-853098