Nozzle Selection for Printhead Miniaturization
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Solution Overview
Problem
Current printer technologies face challenges in reducing printhead size while maintaining performance and cost-effectiveness, as decreasing the size of printheads increases fabrication complexity and reduces efficiency due to the need for complex circuitry and excessive firing reservations for all nozzles, leading to undesired fluid placement and dot placement errors.
Innovation Solution
The method involves selecting nozzles based on print job content, assigning fewer firing reservations to only the necessary nozzles, and varying the firing sequence for each print cycle, which reduces circuitry requirements and minimizes data transmission, allowing for a more efficient and precise printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of printhead is decreased, then the printing device becomes more compact, but fabrication complexity increases and performance deteriorates
Solution Approach 1:
The printhead is divided into multiple primitives, each containing a subset of nozzles that can be independently controlled. This segmentation allows the printhead to maintain a compact physical size while reducing the complexity of circuitry and control signals needed for each individual primitive, thereby resolving the contradiction between small size and fabrication complexity.
2Reliability
If all nozzles are assigned firing reservations, then complete coverage is ensured, but data transmission volume and circuitry requirements increase
Solution Approach 1:
Instead of assigning firing reservations to all nozzles simultaneously, the system uses partial action by assigning reservations only to the subset of nozzles needed for each primitive. This reduces the overall volume of firing data that must be transmitted and stored, while still ensuring complete coverage of the print area through sequential processing of multiple primitives.
3Adaptability or versatility
If firing reservations are sent to each nozzle, then all nozzles can be controlled, but dot placement accuracy decreases due to cross-talk
Solution Approach 1:
By segmenting the printhead into multiple primitives with independent nozzle subsets, the system maintains full control capability over all nozzles while reducing cross-talk interference. Each primitive processes a limited set of nozzles, which improves dot placement accuracy by minimizing the electrical and fluidic cross-talk that would occur if all nozzles were controlled simultaneously through a unified system.
Data Source
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AI summary
Selecting nozzles can include selecting nozzles of a plurality of nozzles to print a portion of a print job based on content of the print job and assigning firing reservations to the selected nozzles, where a total number of the firing reservations assigned to the selected nozzles is comparatively less than a total number of the plurality of nozzles.