Inkjet Recording Device Discharge Orifice Layout Optimization
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Solution Overview
Problem
Existing recording devices face challenges in reducing recording time while maintaining image quality, particularly at the boundaries between regions recorded by different parts of the recording unit, due to differences in ink permeation speed and layout of discharge orifice rows.
Innovation Solution
A recording device with a recording unit comprising separate recording parts for different ink types, where the first and second recording parts are disposed in an intersecting direction, allowing for simultaneous recording of specific regions by both parts, with the distance between discharge orifice rows adjusted based on ink permeation speed to minimize image quality deterioration and recording time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If both left-side and right-side recording parts share recording of the middle portion to maintain image quality, then image quality at the boundary region is improved, but recording time increases due to repeated ink application to the same region
Solution Approach 1:
The patent applies different recording strategies to different regions of the recording medium. The middle portion is divided into a first middle portion recorded only by the left-side recording part and a second middle portion recorded only by the right-side recording part. This local differentiation allows each recording part to handle specific regions without redundant overlapping, thereby maintaining image quality while reducing recording time.
2Device complexity
If discharge orifice rows are arrayed with equal distances to simplify structure, then device complexity is reduced, but image quality deteriorates due to concentration increase in fast-permeation ink when both recording parts share the same middle portion
Solution Approach 1:
The patent implements asymmetric arraying of discharge orifice rows where the distance between the left-side first middle discharge orifice row and the right-side first middle discharge orifice row is set to be greater than the distance between the left-side second middle discharge orifice row and the right-side second middle discharge orifice row. This local differentiation in spacing compensates for the concentration increase effect in fast-permeation ink, thereby maintaining image quality without requiring complex overall restructuring.
Solution Approach 2:
The patent changes the spatial parameters (distances) between discharge orifice rows based on ink permeation characteristics. By adjusting the distances between specific discharge orifice rows, the patent optimizes the recording process to prevent excessive concentration in the middle portion, thereby maintaining image quality while managing the complexity of the discharge orifice row arrangement.
3Productivity
If recording parts are disposed closer together to reduce relative movement distance and increase productivity, then recording time is reduced, but image quality deteriorates due to increased concentration from simultaneous ink application to the same region
Solution Approach 1:
The patent divides the middle portion into two distinct regions with different recording responsibilities. The first middle portion is recorded only by the left-side recording part, while the second middle portion is recorded only by the right-side recording part. This local differentiation allows recording parts to be disposed closer together for improved productivity, while preventing excessive concentration in specific regions by eliminating redundant ink application.
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
The solution enables reduced recording time without increasing the relative movement distance of the recording unit, while effectively suppressing image quality deterioration by optimizing the layout and operation of discharge orifice rows based on ink permeation speeds.
Implementation Method 1
the first ink has a higher permeation speed as to the recording medium than the permeation speed of the second ink as to the recording medium
Data Source
AI summary
A distance between a plurality of discharge orifice rows that discharge ink having a high permeation speed at a plurality of recording parts is made to be shorter than a distance between a plurality of discharge orifice rows that discharge ink having a low permeation speed at a plurality of recording parts.