Liquid Consumption Apparatus Cartridge Replacement Logic
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Solution Overview
Problem
Existing liquid consumption apparatuses, such as image forming devices, often require users to replace cartridges unnecessarily due to inadequate detection of remaining toner levels, leading to duplication of effort and increased user inconvenience.
Innovation Solution
A liquid consumption apparatus with a controller that determines the remaining liquid levels in multiple cartridges and displays a prompt for replacement only when necessary, considering the relative levels of all cartridges to minimize unnecessary replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the apparatus displays a replacement prompt when toner near empty is detected, then users are prompted to replace cartridges in a timely manner, but users may experience unnecessary replacements when multiple cartridges are at low levels
Solution Approach 1:
The system performs preliminary detection of toner levels in all cartridges before displaying replacement prompts. By checking all cartridges in advance and comparing their levels, the system determines the most appropriate timing for display, preventing premature or unnecessary replacement notifications.
Solution Approach 2:
The system dynamically adjusts the display timing based on the relative toner levels of multiple cartridges. Instead of using a fixed threshold, it compares the near-empty cartridge's level against other cartridges and modifies when to display prompts, optimizing both detection accuracy and user convenience.
2Productivity
If the apparatus checks only one cartridge for near empty status, then the detection process is simple and quick, but other cartridges may also be low and require immediate replacement
Solution Approach 1:
The detection process is segmented into two phases: a quick initial check of individual cartridges, followed by a comprehensive multi-cartridge comparison. This allows the system to maintain fast response times while still gathering complete information about all cartridge levels.
Solution Approach 2:
The toner detection system serves multiple functions: it individually monitors each cartridge's level, compares relative levels across all cartridges, determines optimal display timing, and provides comprehensive status information. This multi-functional approach ensures both speed and completeness.
Data Source
AI summary
A controller determines, for each cartridge, whether a remaining amount in a first liquid chamber is smaller than a first liquid amount; in response to determining that a first cartridge exists for which the remaining amount is smaller than the first liquid amount, determines, for each cartridge other than the first cartridge, whether the remaining amount is smaller than a second liquid amount larger than the first liquid amount; in response to determining that a second cartridge exists, determines whether a remaining amount of the second cartridge is smaller than the first liquid amount, the second cartridge having the remaining amount smaller than the second liquid amount; and in response to determining that a particular second cartridge exists, displays a first screen including a first object that prompts replacement of the first cartridge and the particular second cartridge having the remaining amount smaller than the first liquid amount.