Common Band Pass Filter for Printer Fixing and Power Supply Harmonics
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Solution Overview
Problem
Conventional image printers require separate filters for the fixing module and switch mode power supply module to filter harmonic waves at different operating frequency bands, leading to inefficiencies and increased complexity.
Innovation Solution
An image printer design that uses a single band pass filter to filter harmonic waves in a common operating frequency band for both the fixing module and switch mode power supply module, with the fixing module generating high frequency current to fix toner onto a print medium and the switch mode power supply module supplying power to the high frequency generator, while maintaining electrical insulation between the fixing part and power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate filters are used for the fixing module and switch mode power supply module, then each module can filter its specific frequency band, but the device complexity increases and the filtering process becomes less efficient
Solution Approach 1:
The patent merges the filtering functions for the fixing module and switch mode power supply module into a single common filter. This filter is designed to handle harmonic waves from both modules simultaneously, reducing the overall number of filters needed while maintaining effective frequency filtering for each module's operating band.
Solution Approach 2:
The common filter is designed with multi-functionality to serve both the fixing module and switch mode power supply module. It can filter harmonic waves across different frequency bands (including high frequency bands up to 100kHz or more) that are generated by both modules, making a single filter component perform multiple filtering tasks that previously required separate filters.
2Device complexity
If a common filter is used for both modules, then the device complexity is reduced and filtering efficiency is improved, but the filter design becomes more challenging to handle multiple frequency bands
Solution Approach 1:
The patent applies parameter changes by designing the common filter with adjustable frequency characteristics. The filter can be configured to handle multiple frequency bands including the high frequency operating bands of both the fixing module (typically 20-100kHz) and the switch mode power supply module. This parameter-based design allows a single filter to adapt to different frequency requirements without requiring completely separate filter circuits.
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 design simplifies the filtering process, reduces harmonic wave interference, and maintains efficient operation by using a single filter for both modules, enhancing the overall performance and reliability of the image printer.
Implementation Method 1
a band pass filter to filter harmonic waves of a common operating frequency band of the fixing module and the switch mode power supply module
Implementation Method 2
The high frequency generator 150 is supplied with the DC current and generates a high frequency AC current. The generated high frequency AC current is supplied to the fixing part 160 having a heating part 165. The heating part 165 generates heat with resistance or inductance by using the high frequency AC current.
Implementation Method 3
The high frequency generator 150 is supplied with the DC current and generates a high frequency AC current
Data Source
AI summary
An image printer using a common filter to remove harmonic waves generated at a common operating frequency band of a fixing module to fix toner onto a print medium using high frequency power generated from a high frequency generator and a switch mode power supply module to supply operating power to the high frequency generator. The image printer includes a fixing module to fix toner to a print medium using high frequency power generated from a high frequency generator, a switch mode power supply module to supply operating power to the high frequency generator, and a band pass filter to filter harmonic waves of a common operating frequency band of the fixing module and the switch mode power supply module.