Imaging Device Color Averaging for Variable Transport Speed
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Solution Overview
Problem
Existing imaging devices face errors in color component data when the moving speed of a printing medium changes, leading to reduced image quality during the combination of color component data.
Innovation Solution
The imaging device incorporates a transport mechanism, an encoder, multiple color reading elements, a buffer, and color averaging processors. The encoder outputs pulse signals based on the transport speed, allowing the averaging processors to weight and average color reading signals from multiple imaging positions, thereby reducing errors caused by speed changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the printing medium is moved at variable speeds during photographing, then productivity increases, but color component data accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the imaging device move together with the printing medium at variable speeds rather than keeping the imaging device stationary. The imaging device is mounted on the printing medium or moves in synchronization with it, allowing the system to adapt to speed changes while maintaining accurate color component data through real-time synchronization of imaging timing with transport position
Solution Approach 2:
The patent uses feedback by detecting the transport position of the printing medium and adjusting the imaging timing accordingly. The system detects positional information and uses this feedback to control when images are captured, ensuring that color component data remains accurate even when transport speed varies. This closed-loop control compensates for speed fluctuations in real-time
2Measurement precision
If multiple color reading elements are used at different imaging positions, then color accuracy improves, but device complexity increases
Solution Approach 1:
The patent merges multiple color reading functions into a single integrated imaging device that moves with the printing medium. Instead of having separate stationary imaging devices at multiple positions, the system combines red, green, and blue color reading elements into one moving unit, reducing overall system complexity while maintaining the ability to capture color information from multiple effective positions through synchronized movement
Solution Approach 2:
The imaging device is designed with multi-functionality by incorporating multiple color reading elements (red, green, blue sensors) within a single device structure. This universal design allows one device to perform multiple color measurement functions that would otherwise require separate devices, thereby improving color accuracy without proportionally increasing device complexity
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 solution effectively reduces errors between color signals by properly averaging the reading signals from multiple imaging positions, even when the transport speed of the printing medium varies, resulting in improved image quality.
Implementation Method 1
an encoder that outputs a pulse signal in response to a transport speed of the printing medium
Implementation Method 2
an encoder that outputs a pulse signal in response to a transport speed of the printing medium
Implementation Method 3
a first color reading element that outputs a first color reading signal about a first color component by photographing the printing medium
Data Source
AI summary
A first color reading element photographs a printing medium at a first imaging position with imaging timing based on a driving signal, and outputs a first color reading signal in a fixed cycle. A second color reading element photographs the printing medium at a second imaging position with the imaging timing, and outputs a second color reading signal in the fixed cycle. A first color averaging processor performs an averaging process on a plurality of the stored first color reading signals using a weight responsive to a time gap between a first transport signal based on a pulse signal and the driving signal. The pulse signal is output by an encoder in response to a transport speed of the printing medium. Likewise, a second color averaging processor performs an averaging process on a plurality of the stored second color reading signals.