Modular Printhead Arrays for Configurable Cross-Process Print Resolution
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Solution Overview
Problem
Existing inkjet printing systems are limited in their cross-process direction print resolution, as they cannot increase the number of inkjet ejectors in single pass printers, restricting flexibility in print resolution for different ink colors and types.
Innovation Solution
A modular printing system with multiple printhead arrays and ink supplies, allowing user configuration of ink colors and types, and adjustable cross-process direction print resolution by staggering printhead arrays to combine ink droplets for enhanced resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional inkjet ejectors are added to increase cross process direction print resolution, then the maximum cross process direction print resolution is improved, but the device complexity and cost increase
Solution Approach 1:
The printing system is divided into multiple printhead arrays, each with a subset of inkjet ejectors. Instead of using one large array with all ejectors, the system segments the ejectors into separate arrays that can be independently controlled and combined to achieve higher effective resolution without requiring a single complex printhead assembly
Solution Approach 2:
The system transitions from a single-dimension resolution approach (increasing ejectors in one printhead) to a multi-dimensional approach by arranging multiple printhead arrays in different spatial positions and combining their output. This allows resolution enhancement through spatial arrangement rather than simply adding more ejectors to a single array
2Manufacturing precision
If the number of inkjet ejectors is increased to achieve higher print resolution, then the print quality is improved, but the printer size and cost increase
Solution Approach 1:
The printhead system is segmented into multiple smaller arrays that can be positioned in a compact arrangement. Each array contains fewer ejectors, but their combined output achieves the desired high resolution, reducing the overall footprint compared to a single large-array design
Solution Approach 2:
Multiple printhead arrays are designed with universal interfaces and identical or similar ejector configurations. This allows the same physical components to serve multiple functions and positions, reducing the variety of parts needed and enabling a more compact, space-efficient design
3Adaptability or versatility
If fixed printhead configuration is used, then the device simplicity is maintained, but the adaptability to different ink colors and resolutions is reduced
Solution Approach 1:
The system transitions from a static, fixed printhead configuration to a dynamic, reconfigurable system. Multiple printhead arrays can be selectively activated or deactivated based on the printing requirements, allowing the system to adapt to different ink colors, resolutions, and print jobs by dynamically adjusting which arrays are in use
Solution Approach 2:
The system allows changes in operating parameters such as the number of active printhead arrays, the combination of ink colors, and the effective resolution by selectively enabling or disabling specific arrays. This parameter flexibility enables adaptation to different printing needs without physical reconfiguration
Data Source
AI summary
A printing device can be configured with different numbers of ink colors and ink types to print with a different cross-process direction print resolution for each ink color and ink type. The printing device includes a plurality of printhead arrays with each printhead array being configured to eject ink onto an image receiving surface at a first print resolution in a cross-process direction. Each ink supply in a plurality of ink supplies is configured to provide ink to one printhead array in the plurality of printhead arrays, and a controller is configured to operate the printhead arrays at one of at least two combinations of ink colors and ink types. The controller operates the printhead arrays ejecting a same ink color or a same ink type at a second print resolution in the cross-process direction that is different than the first print resolution.