Scanner CIS Heat Management via Frequent Black Reference Data
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Solution Overview
Problem
Existing image reading apparatuses face challenges in enhancing image quality due to changes in black reference data, particularly when heat is generated during the reading process, leading to degradation of image quality.
Innovation Solution
The apparatus includes a control section that frequently obtains black reference data more than white reference data, using a movable section like a driving motor to generate heat, and arranges a white reference material opposite the transport reading region to enhance image quality by controlling heat-induced degradation and processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If black reference data is obtained frequently to counteract heat-induced changes, then image quality is improved, but processing time is extended
Solution Approach 1:
The control section obtains black reference data in advance at the transport reading region before the reading section moves to the static reading region. This preliminary acquisition of reference data allows the system to prepare correction data proactively, reducing the need for frequent interruptions during the reading process and thereby limiting processing time extension while maintaining image quality.
Solution Approach 2:
The control section obtains black reference data periodically at the transport reading region during continuous reading operations. This periodic acquisition strategy ensures that heat-induced changes are captured at regular intervals without requiring continuous measurement, thus improving image quality while controlling the increase in processing time through structured, interval-based sampling.
2Measurement precision
If the reading section moves frequently to obtain black reference data, then image quality is improved, but reading speed is reduced
Solution Approach 1:
The control section obtains black reference data in advance at the transport reading region before the reading section needs to move to the static reading region. This preliminary acquisition allows the system to have reference data ready, reducing the frequency and duration of movements required during active reading, thereby maintaining reading speed while improving image quality through updated reference data.
Solution Approach 2:
The control section combines the acquisition of black reference data with the existing transport reading region operations. By obtaining black reference data during the normal transport reading process rather than requiring separate dedicated movements, the system merges two functions into one operational phase, thus improving image quality without significantly reducing reading speed.
3Measurement precision
If black reference data is obtained more frequently than white reference data, then image quality is improved, but device complexity increases
Solution Approach 1:
The control section is configured to obtain black reference data in advance at the transport reading region before proceeding to obtain white reference data at the static reading region. This preliminary action sequence simplifies control logic by establishing a clear temporal order of operations, reducing control complexity while enabling frequent black reference data acquisition to improve image quality.
Solution Approach 2:
The control section implements a periodic acquisition pattern where black reference data is obtained at regular intervals during transport reading operations. This periodic structure provides a simple, predictable control rhythm that reduces device complexity compared to continuous or irregular acquisition strategies, while still achieving improved image quality through frequent updates of black reference data.
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 effectively enhances image quality by frequently updating black reference data to counteract heat-induced changes and reduces processing time, ensuring consistent image quality during document reading.
Implementation Method 1
a movable section which moves while generating heat when the reading section reads the document. As the reading section continues a reading process, the movable section generates heat resulting in a change in the black reference data
Data Source
AI summary
A carriage motor which is a heat generating device is arranged next to a CIS in a scanner unit. The carriage motor drives respective transport rollers of an ADF unit via a gear system as well. The scanner unit makes a white reference board be read so as to obtain white reference data, and obtains black reference data more frequently than the white reference data, e.g., in a continuous process for reading a document. As a CIS module continues a reading process, the black reference data changes as being affected by a change in temperature in the CIS module, etc. The scanner unit deals with such a change in the black reference data by obtaining the black reference data more frequently.