Cartridge State Control Device for Accurate Printable Period Computation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses inaccurately estimate the printable period due to differences in initial cartridge states, such as varying capacities and usage histories, leading to inadequate computation of when printing will become impossible.
Innovation Solution
A control device acquires and stores use information from connected cartridges, determines if cartridge replacement has occurred, and computes the printable period based on reference and target use information, outputting alerts when the period is shorter than a set period or when the cartridge state exceeds usage limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference use information is used to compute printable period, then computation can be performed, but accuracy deteriorates when actual cartridge initial state differs from reference
Solution Approach 1:
The system performs preliminary acquisition of actual use information from the connected cartridge and determines cartridge replacement status before computing the printable period. This preliminary action allows the system to adapt the computation to the actual initial state of the cartridge rather than relying solely on predetermined reference values, thereby improving accuracy while maintaining adaptability.
2Measurement precision
If cartridge replacement detection is implemented, then accuracy of printable period computation improves, but device complexity increases
Solution Approach 1:
The system implements feedback by repeatedly acquiring use information from the cartridge and detecting whether cartridge replacement has occurred based on changes in this information. The detection result feeds back into the printable period computation, allowing the system to adapt to actual cartridge states. This feedback mechanism improves accuracy while keeping the control logic relatively simple by leveraging existing acquisition capabilities.
Data Source
AI summary
When cartridge replacement has occurred, reference use information that is acquired for the first time after occurrence of the cartridge replacement and reference time information indicative of when the reference use information is acquired are stored. Every time target use information, which is acquired after the reference use information is acquired, is acquired, a first period, which is defined from a particular time until printing by a printing execution section using printing agent in a presently-connected cartridge is estimated to become impossible, is computed based on the target use information, target time information indicative of time when the target use information is acquired, the reference use information, and the reference time information. When the first period is shorter than a first set period, output information corresponding to the state of use of the presently-connected cartridge is outputted.