Image Recording Apparatus Detection Region Memory
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Solution Overview
Problem
Existing image recording apparatuses require multiple iterations of tray and carriage movement to detect if a CD or DVD has already undergone image recording, leading to prolonged judgment times and potential re-recording errors due to user operational errors.
Innovation Solution
An image recording apparatus with a tray, conveying portion, recording portion, detecting portion, detection-region determining portion, detection-region memory, controlling portion, and judging portion, which allows for quick detection of recorded regions on the media by memorizing and utilizing pre-recorded detection regions to determine if image recording has already been performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor detects the recorded surface by repeatedly moving the carriage in the main scanning direction and conveying the tray in the tray conveyance direction, then the detection accuracy is improved, but the judgment time becomes excessively long
Solution Approach 1:
The patent applies preliminary action by determining and memorizing the detection region based on the recorded region before the actual detection process. The detection region is calculated in advance using the relationship between the recorded region and the sensor movement pattern, storing only the essential detection parameters rather than performing repeated full scans. This preliminary determination of the detection region allows the system to quickly identify whether a recording medium has been previously recorded without requiring multiple iterative movements of the carriage and tray.
2Reliability
If multiple iterations of tray and carriage movement are performed to detect recorded regions, then the detection reliability is improved, but the operational efficiency deteriorates
Solution Approach 1:
The patent extracts only the essential detection region information from the recorded region, storing merely the detection region parameters rather than the complete recorded region data. This extraction of critical information allows the system to maintain detection reliability by focusing on the key area that indicates previous recording, while dramatically improving operational efficiency by avoiding repeated full-scanning movements of the carriage and tray.
Solution Approach 2:
The detection region is determined and memorized in advance based on the recorded region characteristics. This preliminary action establishes the detection parameters before actual detection is needed, enabling the system to quickly verify recording status without performing multiple iterative movements, thus maintaining reliability while enhancing productivity.
Data Source
AI summary
An image recording apparatus includes: a tray for holding a medium; a conveying portion for conveying the tray; a recording portion for recording an image onto the medium held by the tray; a detecting portion for detecting the medium. A detection-region determining portion determines, a detection region of the medium which is to be detected and a detection-region memory portion memorizes the determined detection region. Prior to the next image recording, the detecting portion detects the detection region, based on the detection region that has been memorized in previous image recording. A judging portion judges whether the image has been already recorded onto the medium or not, based on result of detection made by the detecting portion.