Browse Prior Art Database

LENSLESS LED HIGH RESOLUTION PRINT BAR

IP.com Disclosure Number: IPCOM000026154D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 89K

Publishing Venue

Xerox Disclosure Journal

Abstract

Conventional LED imaging technology uses a gradient index (SelfocTM) lens array (or equivalent optical imaging component) to image a light pattern output from a LED array onto a photoreceptor. A LED imaging system which does not use the optical imaging component is shown in Figure 1. Figure 1 is a side view of a LED system 10 which forms an image on the surface of a photoreceptor belt 12.

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XEROX DISCLOSURE JOURNAL

LENSLESS LED HIGH RESOLUTION PRINT BAR Ronald E. Godlove

Proposed Classification
U.S. C1.355/210 Int. C1. G03g 15/00

FIG. 1

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 237

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LENSLESS LED HIGH RESOLUTION PRINT BAR(Cont'd)

Conventional LED imaging technology uses a gradient index (SelfocTM) lens array (or equivalent optical imaging component) to image a light pattern output from a LED array onto a photoreceptor. A LED imaging system which does not use the optical imaging component is shown in Figure 1. Figure 1 is a side view of a LED system 10 which forms an image on the surface of a photoreceptor belt 12.

The cross-hatched area represents the outboard and inboard end plates of a lightly compressed air chamber 14. The area 16 labeled "baffle" represents the bottom of the same chamber. The photoreceptor belt moving from left to right serves to contain the lightly compressed air along with the just above-named components. Air is admitted to chamber 14 through gap 22 shown in the area of the bottom baffle. Sufficient air pressure and air flow must be supplied to force air between the very narrow gap between the photoreceptor belt and the LED region of the LED print bar. This, coupled with the fact that the moving photoreceptor belt will "drag" (via surface friction) air through the gap, will result in a thin layer of air between the belt and the LED print bar. In...