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Dual Inline Charging Device with Point-by-Point Voltage Control

IP.com Disclosure Number: IPCOM000019195D
Publication Date: 2003-Sep-03
Document File: 2 page(s) / 39K

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. Dual row of inline individual pins of pin charging device can be controlled by independent circuitry to individual voltages. 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. Device mimics a solid wire, but is not subject to catastrophic failure or hot spotting.

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Dual Inline Charging Device with Point-by-Point Voltage Control

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

Dual row of inline individual pins of pin charging device can be controlled by independent circuitry to individual voltages. 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. Device mimics a solid wire, but is not subject to catastrophic failure or hot spotting.

Schematic:

Diagram:

Description:

The Dual in-line-charging device is a series of individual pins (upper and lower) 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.

Utilizing this method the charge can be varied on each pin, from...