Digital Control High Voltage Generation ASIC Reducing Heat
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Solution Overview
Problem
Conventional high voltage power supplies for image forming apparatuses employ numerous components and analog control methods, leading to errors, increased manufacturing time, and heat generation, which hinder cost savings and reliability.
Innovation Solution
A digital control method using a single ASIC chip to control high voltage generation by interrupting current in a primary coil of a power transforming part, with a digital interfacing part converting PWM signals and a digital controlling part modulating the switching operation based on feedback signals, utilizing MOSFETs as switching devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional analog control methods with numerous components are used, then high voltage generation is achieved, but device complexity and manufacturing time increase
Solution Approach 1:
The patent merges multiple discrete components (switching devices, control circuits, feedback circuits, protection circuits) into a single integrated circuit chip. This consolidation reduces the overall component count from numerous separate parts to one unified device, directly resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The integrated circuit chip performs multiple functions simultaneously: voltage transformation, digital control, feedback processing, and protection. This multi-functionality eliminates the need for separate dedicated components for each function, reducing complexity while maintaining comprehensive system capabilities.
2Manufacturing precision
If conventional analog control methods are used, then high voltage generation is achieved, but manufacturing precision and error rates are affected
Solution Approach 1:
The patent replaces analog control mechanisms with digital control systems. The digital controlling part uses digital signals and logic to precisely control the switching part, eliminating analog signal degradation and drift issues. This substitution improves control precision and reduces errors inherent in analog systems.
Solution Approach 2:
The patent implements a feedback circuit that continuously monitors the output voltage and feeds this information back to the digital controlling part. This closed-loop feedback system enables real-time correction of any deviations, significantly improving manufacturing precision and reducing error rates compared to open-loop analog control.
3Reliability
If numerous discrete components are used, then high voltage generation is achieved, but heat generation increases
Solution Approach 1:
By integrating multiple components into a single chip, the patent reduces the total surface area requiring heat dissipation. The compact integrated structure allows for more efficient thermal management compared to numerous discrete components spread across a larger area, thereby reducing overall heat generation.
4Productivity
If conventional analog control with multiple components is used, then high voltage generation is achieved, but productivity and manufacturing time are reduced
Solution Approach 1:
The integration of multiple components into a single chip dramatically simplifies the assembly process. Instead of assembling and wiring numerous discrete components, the system requires installation of a single integrated circuit module, directly improving productivity and reducing manufacturing time.
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 reduces component count, minimizes heat generation, and enhances reliability and efficiency, allowing for precise control of multiple channels with reduced manufacturing time and improved flexibility.
Implementation Method 1
a power transforming part having a primary coil and a secondary coil to supply a voltage to the image forming part
Data Source
AI summary
An apparatus to generate a high voltage includes a switching part to control a voltage induced in a secondary coil of a power transforming part, by interrupting a current in a primary coil of the power transforming part, a digital controlling part to control the interruption operation of the switching part according to supplied control data. The switching part, the digital interfacing part and the digital controlling part may be embodied in an ASIC chip (application-specific integrated circuit). An optimum control according to an output state of the apparatus is easily achieved, manufacturing time for tuning each parameter is reduced and heat generation in the apparatus is reduced.