Pixelated Imaging Plate for High-Resolution Electrophotographic Printing
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Solution Overview
Problem
Conventional electrophotographic printers face limitations in print quality, noise levels, and power consumption, as well as a negative ozone impact, which affect the resolution and efficiency of text and image production.
Innovation Solution
The introduction of a printing device that uses an electrical field to selectively transfer charged toner particles from a developer to an imaging plate, employing a system of pixel plates and a background grid with adjustable biases to control the electrostatic transfer of toner particles, allowing for improved image development and fixation without the need for extensive curing or drying processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrophotographic printing is used, then printing functionality is provided, but print quality and resolution are limited
Solution Approach 1:
The imaging plate is divided into multiple pixel plates that can be independently controlled. Each pixel plate corresponds to a specific region and can be selectively charged or discharged to control toner deposition in that region, enabling precise print quality control
Solution Approach 2:
The system dynamically adjusts the charge state of individual pixel plates during the printing process. By selectively charging or discharging specific pixel plates in response to image data, the system achieves high-resolution printing with controlled toner transfer to specific areas
2Object-affected harmful factors
If conventional electrophotographic printing is used, then printing functionality is provided, but noise levels are high
Solution Approach 1:
The patent extracts and eliminates the corona wire component from the printing system. By replacing the corona wire with a non-corona-based charging mechanism using pixel plates, the system removes the primary source of ozone generation and electrical noise while maintaining printing functionality
3Use of energy by moving object
If conventional electrophotographic printing is used, then printing functionality is provided, but power consumption is high
Solution Approach 1:
The system uses dynamic voltage control of pixel plates to optimize power consumption. By applying voltage only to pixel plates that need to be charged or discharged for the current image, rather than continuously charging the entire imaging surface, the system reduces energy consumption while maintaining printing efficiency
Solution Approach 2:
The patent applies local quality control by treating different regions of the imaging plate differently. Each pixel plate can be independently charged or discharged based on the specific printing requirements of that region, optimizing power usage by avoiding unnecessary charging of areas that don't require toner transfer
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances print quality by providing greater control over the electrical field, improving edge acuity and contrast, reducing noise and power consumption, and minimizing ozone emissions, resulting in higher resolution and more efficient image production.
Implementation Method 1
toner particles are moved electrostatically from a developer to develop a latent image
Implementation Method 2
uses an electrical field to selectively transfer charged toner particles from a developer to an imaging plate
Implementation Method 3
employing a system of pixel plates and a background grid with adjustable biases to control the electrostatic transfer of toner particles
Data Source
AI summary
A printing device includes a developer for developing a latent image with toner particles; an imaging plate comprising a plurality of pixel plates; and a plurality of voltage generators connected respectively to the pixel plates. The voltage generators positively bias selected pixel plates to form a latent image that is developed with toner from the developer.Another printing device includes a developer for developing a latent image with toner particles; an imaging plate comprising a plurality of pixel plates for selectively receiving toner particles from the developer; a plurality of voltage generators for biasing respective to pixel plates; and a background grid in the imaging plate for preventing toner particles from being deposited in areas between the pixel plates, wherein the background grid is connected to a voltage generator for applying a range of biases, positive and negative to the background grid. A method of electrophotographic printing in which toner particles are moved electrostatically from a developer to develop a latent image includes positively biasing selected pixel plates of a plurality of pixel plates of an imaging plate to form the latent image; and developing the latent image with the toner particles from the developer.