Inkjet Mask Pattern Selection for Droplet Landing Deviation
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Solution Overview
Problem
Existing inkjet recording technologies face challenges in maintaining image quality during multi-scan printing due to landing position deviations of ink droplets, leading to banding and uneven density issues, as they rely on simple mask processing techniques that do not effectively adjust discharge sizes and amounts based on gradation and droplet types.
Innovation Solution
A liquid discharge apparatus and method that utilize a storage device to store multiple mask patterns, allowing for selective discharge processing by determining the discharge size of ink droplets based on dot data and mask patterns, including patterns for no discharge, constant discharge size, and varying discharge size, to enhance image quality by adjusting the overlapping ratio of ink droplets according to gradation and droplet type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple mask processing techniques are used for multi-scan printing, then device complexity is reduced, but manufacturing precision deteriorates due to landing position deviations causing banding and uneven density
Solution Approach 1:
The patent applies dynamics by making the mask patterns adjustable and selectable based on printing conditions. Multiple mask patterns are stored in memory, and the appropriate mask is selected based on the droplet type and gradation, allowing the system to adapt dynamically rather than using a fixed simple mask
Solution Approach 2:
The patent changes parameters by varying the mask pattern selection based on droplet type (first, second, third types) and gradation levels. This allows the overlapping ratio to be adjusted according to specific printing conditions, improving image quality without requiring complete redesign of the mask processing system
2Manufacturing precision
If multiple mask patterns are stored and selected based on droplet type and gradation, then manufacturing precision is improved by reducing landing position deviations, but device complexity increases
Solution Approach 1:
The patent segments the mask processing by dividing it into multiple discrete mask patterns (first, second, third types) corresponding to different droplet types. Each mask pattern is optimized for specific conditions, allowing precise control without requiring a completely complex unified system
Solution Approach 2:
The patent applies preliminary action by pre-storing multiple mask patterns in memory before actual printing. The appropriate mask is selected and applied based on the droplet type and gradation, so the complex processing is prepared in advance rather than calculated in real-time during printing
3Manufacturing precision
If the overlapping ratio is adjusted according to droplet type and gradation, then manufacturing precision is improved by reducing banding and uneven density, but ease of operation deteriorates
Solution Approach 1:
The patent applies self-service by making the system automatically select the appropriate mask pattern based on the droplet type and gradation without requiring manual intervention. The control unit automatically determines which mask to use, simplifying operation while maintaining precision
Data Source
AI summary
A liquid discharge apparatus includes a liquid discharge head, a scanning device, a storage device, and circuitry. The liquid discharge head discharges liquid from a plurality of nozzles onto a recording medium. The scanning device moves at least one of the recording medium and the liquid discharge head to perform scanning. The storage device stores a plurality of mask patterns to change a discharge amount and a discharge size of the liquid from the liquid discharge head. The circuitry acquires image data, creates dot data from the image data, and determines the discharge size of the liquid to be discharged from the liquid discharge head, based on the dot data and one of the plurality of mask patterns.