Independent Cooling Control for Light Emitting Unit Length
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Solution Overview
Problem
Conventional electrophotographic systems face image quality degradation due to differences in the length of light emitting units, which necessitates length classification, complicating stock management and exchangeability.
Innovation Solution
A system comprising a first and second light emitting unit with independent cooling means, controlled by a unit to adjust their lengths, ensuring the emitting areas are substantially equal, thereby maintaining image quality regardless of length differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting units are manufactured with different lengths due to positioning errors and tolerances, then production flexibility is improved, but image quality deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the temperature of light emitting units to adjust their physical length. By varying the temperature through independent cooling means, the emitting area length of each light emitting unit can be adjusted to compensate for manufacturing tolerances, thereby maintaining image quality without requiring strict manufacturing precision
Solution Approach 2:
The patent replaces the mechanical approach of physically selecting and classifying light emitting units by length with a thermal control approach. Instead of mechanically sorting units during assembly, the system uses temperature control to dynamically adjust the length of each unit, substituting a thermal field control mechanism for a mechanical classification system
2Manufacturing precision
If light emitting units are classified in length classes to maintain image quality, then image quality is improved, but device complexity and stock management complexity increase
Solution Approach 1:
The patent eliminates the need for length classification by using temperature control to adjust the length parameter of each light emitting unit. Instead of sorting units into different length classes, the system dynamically controls the temperature of each unit to achieve the desired emitting area length, thereby simplifying the overall system complexity
Solution Approach 2:
The patent extracts and removes the length classification step from the system. By implementing thermal control to adjust length, the classification process is completely eliminated, simplifying stock management and reducing device complexity while maintaining image quality
3Manufacturing precision
If light emitting units are classified in length classes, then image quality is maintained, but exchangeability of units deteriorates
Solution Approach 1:
The patent enables universal exchangeability of light emitting units by using temperature control to adjust the emitting area length after installation. Any light emitting unit can be adapted to the required length by controlling its temperature, eliminating the need for pre-classification and enabling free exchangeability while maintaining image quality
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
The system achieves accurate control of light emitting area lengths, ensuring image quality by actively adjusting the cooling of light emitting units to maintain desired lengths, even when they have different initial lengths, thus eliminating the need for length classification.
Implementation Method 1
The control unit is configured for controlling the cooling of at least one of said first cooling means and said second cooling means such that at least one of said first elongate emitting area and said second elongate emitting area, respectively, has a desired length
Data Source
AI summary
A system for use in image reproduction, the system includes at least a first light emitting unit and a second light emitting unit. The first light emitting unit includes a first cooling means arranged for cooling the first light emitting unit. The second light emitting unit includes a second cooling means arranged for cooling the second light emitting unit independently of the first light emitting unit. The first light emitting unit has a first elongate emitting area. The second light emitting unit has a second elongate emitting area. A control unit controls the cooling of at least one of the first cooling means and the second cooling means such that at least one of the first elongate emitting area and the second elongate emitting area, respectively, has a desired length.