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Charging Device with Point by Point Voltage Control with Feedback

IP.com Disclosure Number: IPCOM000019196D
Publication Date: 2003-Sep-03
Document File: 1 page(s) / 24K

Publishing Venue

The IP.com Prior Art Database

Abstract

Charging of imaging surface is non-uniform across surface. Previous efforts to improve on this include scorotron grids, corotron pins, etc. Individual pins of pin charging device can be controlled by independent circuitry to individual voltages with Feedback. This allows the individual pins to have the appropriate voltage to produce a uniform charge on the imaging device. This technique can be used with or without a (scorotron) grid between the pin charging device and the imaging device.

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Charging Device with Point by Point Voltage Control with Feedback

Charging of imaging surface is non-uniform across surface. Previous efforts to improve on this include scorotron grids, corotron pins, etc.

Individual pins of pin charging device can be controlled by independent circuitry to individual voltages with Feedback. This allows the individual pins to have the appropriate voltage to produce a uniform charge on the imaging device. This technique can be used with or without a (scorotron) grid between the pin charging device and the imaging device.

Diagram:

Description:

The Charging device is a series of individual pins or wire segments mounted on a nonconductive substrate. Each charge pin is connected to the voltage source via a voltage amplifier. Each voltage amplifier is connected to the address decoder, and a data buss decoder. The address decoder and data buss decoder are routed to the system buss of the Image Output Terminal (IOT).

Based on the IOT function, each charging pin can be activated individually via control signals from the IOT system buss. The address decoder selects the chosen charge pin amplifier. Based on required charge strength, the amplifier gain is set from the data buss decoder. The gain of each amplifier would be correlated to the desired pin charge, by means of the feedback loop. Feedback can be based on several different types of physical measurements, including, but not limited to: voltage on the imaging device, optical density of a developed...