Display Unit Image Forming Apparatus Laser Scanning Replacement
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Solution Overview
Problem
Conventional image forming apparatuses using laser scanning units are inefficient due to complex structures, slow image formation, mechanical instability, and difficulty in aligning color images, leading to reduced printing speed and image quality.
Innovation Solution
An image forming apparatus utilizing a display unit instead of a laser scanning unit, which outputs image data directly to a photosensitive medium to form electrostatic latent images, allowing for faster image formation and improved alignment through pixel-based illumination and precise control of the display unit's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a laser scanning unit is used to form images, then image formation is achieved, but the structure becomes complex and printing speed decreases
Solution Approach 1:
The patent removes the laser scanning unit from the image forming apparatus, extracting the problematic component that caused structural complexity and slow image formation. Instead of using laser scanning to create electrostatic latent images, the invention directly transfers images from a display unit to the photosensitive medium, eliminating the need for complex laser scanning mechanisms and significantly improving printing speed.
Solution Approach 2:
The invention replaces the mechanical laser scanning system with a direct optical transfer method using a display unit. Instead of using mechanical moving parts like laser scanners to illuminate the photosensitive medium line by line, the patent uses a display unit that can directly project or transfer the entire image at once, substituting a complex mechanical scanning system with a simpler optical direct-transfer approach.
2Loss of time
If a laser scanning unit is used to form images, then image formation is achieved, but image formation time increases
Solution Approach 1:
The invention prepares the image in advance on a display unit before transfer to the photosensitive medium. By having the complete image ready on the display unit and directly transferring it to the photosensitive medium without sequential laser scanning, the system eliminates the time loss associated with line-by-line image formation, significantly reducing image formation time and improving overall printing speed.
3Manufacturing precision
If conventional methods are used to align color images, then images are transferred, but alignment precision decreases and image quality deteriorates
Solution Approach 1:
The patent uses the display unit as a master copy that directly transfers the image to the photosensitive medium. By copying the image directly from the display unit pixels to the photosensitive medium in a one-to-one correspondence, the system achieves high alignment precision without complex alignment control mechanisms. The display unit itself serves as the reference, eliminating the need for separate alignment procedures.
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 enables higher printing speeds, reduces image formation time, and minimizes image distortion and irregular densities, resulting in improved image quality and simplified apparatus design.
Implementation Method 1
a photosensitive medium to form an electrostatic latent image corresponding to image data outputted from the display unit
Data Source
AI summary
An image forming apparatus includes a display unit which outputs image data in the form of a complete image, a photosensitive medium which forms an electrostatic latent image corresponding to the image outputted from the display unit, a developing unit which develops the electrostatic latent image formed on the photosensitive medium, a transfer unit which transfers the developed image of the photosensitive medium onto a printing medium, and a fixing unit which fixes the transferred developed image in the printing medium.