Inkjet Printer Control Speed Optimization
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Solution Overview
Problem
Inkjet printing speed is limited by nozzle firing quality and reliability, leading to reduced image quality and efficiency, as increased firing frequency often results in splash-back and satellite droplet issues, affecting print quality over multiple prints.
Innovation Solution
A method to determine an optimum printing speed for inkjet printers by analyzing nozzle firing quality and image attributes, allowing for faster printing without unacceptable loss in quality, involving the use of test images and printer-specific data to establish maximum reliable speeds for various fill ratios and nozzle utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the firing frequency of printhead nozzles is increased to raise printing speed, then productivity is improved, but nozzle firing quality deteriorates due to splash-back and satellite droplet formation
Solution Approach 1:
The patent applies dynamics by making the printing speed variable rather than fixed. The system dynamically adjusts the printing speed based on real-time analysis of image attributes (such as fill ratio and complexity) and continuous monitoring of nozzle firing quality. This allows the printing speed to be optimized for each specific printing task while maintaining acceptable quality standards, resolving the contradiction between high speed and high precision.
Solution Approach 2:
The patent changes the parameter of printing speed based on different image attributes and nozzle performance conditions. By analyzing image characteristics (such as solid fill percentage, pattern complexity) and adjusting the printing speed parameter accordingly, the system achieves high productivity for simple images while maintaining quality for complex images. This parameter adaptation resolves the contradiction by making speed conditional rather than absolute.
2Productivity
If the firing frequency is increased beyond a certain point, then printing speed improves, but reliability of nozzle firing deteriorates due to ink build-up on nozzle plates
Solution Approach 1:
The patent implements feedback by continuously monitoring nozzle firing quality and using this information to adjust printing parameters. The system analyzes whether nozzles are functioning reliably (detecting issues like ink build-up or satellite droplets) and adjusts the printing speed or triggers maintenance procedures accordingly. This closed-loop feedback mechanism maintains reliability while maximizing productivity by operating at optimal speeds.
Solution Approach 2:
The patent applies preliminary action by analyzing image attributes before printing and determining the appropriate printing speed in advance. By pre-assessing the image characteristics (such as fill ratio and pattern density) and predicting the required printing speed to maintain reliability, the system avoids pushing nozzles beyond their reliable operating limits. This preventive approach maintains nozzle reliability while achieving high productivity where possible.
3Productivity
If printing speed is increased to improve throughput, then productivity is improved, but image quality deteriorates due to reduced nozzle firing consistency
Solution Approach 1:
The patent makes the printing speed dynamic rather than fixed, adjusting it based on image attributes and real-time nozzle performance. For simple images with large solid areas, higher speeds are used to maximize throughput. For complex images requiring precise droplet placement, the system automatically reduces speed to maintain image quality. This dynamic adaptation resolves the contradiction between throughput and quality.
Solution Approach 2:
The patent applies local quality by differentiating printing speed requirements for different regions or types of images. Rather than using a uniform speed for all printing tasks, the system tailors the printing speed to the specific characteristics of each image (such as fill ratio, pattern complexity, and color requirements). This localized optimization ensures high quality where needed while maintaining high throughput where possible.
Data Source
AI summary
A printing speed for printing an image using an inkjet printer is determined. Information regarding a measure of the nozzle firing quality of the printer as a function of printing speed and in relation to an image attribute is determined. The image to be printed is analyzed in respect of the image attribute and the information regarding the measure of the nozzle firing quality is used to determine an optimum printing speed for printing the image. Thus a determination may be made as to how fast a particular image may be printed using a particular printer arrangement without unacceptable loss of print quality of the image. Also described is a method of determining printing instructions for printing a plurality of images in which a printing speed for each image is determined, and printing instructions for printing the plurality of images is determined so as to increase the overall efficiency of printing the plurality of images.