Inkjet Dot Data Conversion for Print Quality Consistency
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Solution Overview
Problem
Inkjet textile printing devices of different sizes produce images with varying print quality due to differences in ink drop dispersion, with large-sized devices forming multiple dots in the main scanning direction, leading to a blurred actual image compared to the clear sample image produced by small-sized devices.
Innovation Solution
A dot data generating method that converts dot data from a large-sized inkjet recording device into second dot data for a small-sized device, adjusting the formation of dots to create multiple dots at predetermined intervals in the relative movement direction, matching the dispersion pattern of the large-sized device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If common dot data is used for both large-sized and small-sized inkjet textile printing devices, then the sample image can be printed using the small-sized device, but the print quality of the sample image does not match the actual image quality
Solution Approach 1:
The patent changes the dot formation parameters by converting single dot data into multiple dot data at predetermined intervals in the main scanning direction. This parameter transformation allows the small-sized device to replicate the dispersed dot pattern characteristic of large-sized devices, thereby achieving consistent print quality across different device sizes.
Solution Approach 2:
The patent segments a single dot into multiple dots arranged at predetermined intervals in the main scanning direction. By dividing one dot position into multiple discrete dot positions, the system reproduces the dispersed dot pattern effect that occurs naturally in large-sized devices due to air flow, thus matching print quality between different device sizes.
2Device complexity
If a small-sized inkjet textile printing device is used for printing sample images, then device complexity is reduced, but ink drop dispersion in the main scanning direction cannot be achieved
Solution Approach 1:
The patent transforms the dot data parameters to account for the absence of air flow-induced dispersion in small-sized devices. By converting single dot positions into multiple dots at predetermined intervals along the main scanning direction, the system compensates for the lack of natural dispersion and achieves matching print quality.
Solution Approach 2:
The patent creates a virtual copy of the dispersion pattern that would occur in large-sized devices. By generating multiple dots at intervals that simulate the dispersed landing positions, the small-sized device reproduces the characteristic print quality of large-sized devices without requiring the physical infrastructure that generates air flow.
3Productivity
If a large-sized inkjet textile printing device is used for printing actual images, then high productivity is achieved, but the image appears more blurred due to multiple dispersed dots
Solution Approach 1:
The patent inverts the approach by making the small-sized device produce the blurred effect typically associated with large-sized devices. By deliberately creating multiple dots at predetermined intervals in the main scanning direction, the system reverses the usual relationship where large devices produce dispersed dots and small devices produce sharp dots.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the production of sample images with print quality similar to actual images by dispersing dots in the main scanning direction, ensuring consistent quality across both device sizes.
Implementation Method 1
printing of an image is conducted to fabric by ejecting ink from a recording head
Implementation Method 2
landing positions of ink drops is different between a large-sized inkjet textile printing device and a small-sized inkjet textile printing device
Implementation Method 3
a strong air flow is generated in the main scanning direction between the surface of the fabric and the nozzle surface of the recording head at the time of a main scan of the recording head. In the large-sized inkjet textile printing device, an ink drop of one shot ejected from the recording head lands onto fabric with being dispersed in the main scanning direction due to this air flow
Data Source
AI summary
A dot data generating method uses a first inkjet recording device and a second inkjet recording device, in which a first image is printed using the first inkjet recording device based on first dot data which determines formation or non-formation of dots, and second dot data is generated to print a second image based on the second dot data using the second inkjet recording device in which a speed of a relative movement of the inkjet head and a recording medium when printing an image is small compared to the first inkjet recording device. The dot data generating method includes generating the second dot data by converting the first dot data such that data of each dot in which formation of a dot is determined is converted to form a plurality of dots at predetermined intervals between the dots in a relative movement direction in place of the each dot.