Laser Scanning Unit Noise Reduction via Dynamic Speed Control
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Solution Overview
Problem
Image forming apparatuses generate noise due to the continuous driving of laser scanning units in standby and printing modes, even when not needed, leading to unnecessary noise and energy consumption.
Innovation Solution
An image forming apparatus with a user interface that allows users to select low noise modes, controlling the driving of the laser scanning unit and print speed to reduce noise, including options to prevent laser scanning unit operation in standby mode, drive it at slower speeds during standby, or adjust speeds during printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the laser scanning unit is continuously driven in standby mode to reduce printing preparation time, then productivity is improved, but noise is generated
Solution Approach 1:
The patent applies dynamics by making the laser scanning unit's operation state adjustable rather than fixed. The controller dynamically changes the driving state of the laser scanning unit based on the selected mode (standby mode or low noise mode), allowing the system to adapt between productivity-oriented and noise-reduction-oriented operation
Solution Approach 2:
The patent applies parameter changes by modifying the operational parameters of the laser scanning unit. In low noise mode, the driving frequency and speed parameters are reduced or stopped entirely during standby events, whereas in normal standby mode, the laser scanning unit operates at full speed to prepare for printing
2Productivity
If the laser scanning unit is driven at normal speed during printing, then productivity is improved, but noise is increased
Solution Approach 1:
The system dynamically adjusts the laser scanning unit's speed parameter based on user selection. In low noise mode during printing, the controller reduces the driving speed to minimize noise while still performing the printing function, whereas normal mode maintains full speed for maximum productivity
Data Source
AI summary
An image forming apparatus including: a user interface unit to display a user interface to select one or more low noise modes to reduce noise produced during a print standby state and a printing state of the image forming apparatus; and a controller to control the driving of a laser scanning unit and to control a print speed, according to one or more of the selected low noise modes selected through the user interface. Therefore, noise generated in the print standby state, and/or the printing state, are reduced, according to a low noise mode selected by a user.