Efficient Multicolor Printing for Electronic Devices
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Summary
Problems
The existing processes for manufacturing electronic devices with multiple colors, such as LCDs and OLEDs, are inefficient due to the need for recalibration and realignment between printing colors, particularly when producing three colors like red, green, and blue, which increases production time and complexity.
Innovation solutions
A process involving a printing head with nozzles arranged in a specific pattern and spacing, where q colors are printed using a regular alternating pattern, and r colors are applied using a non-printing method, allowing for efficient formation of a regular array of subpixels with reduced recalibration and realignment requirements.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If multiple colors are printed sequentially with recalibration and realignment, then color accuracy is improved, but production time increases
Why choose this principle:
The printing head is pre-configured with nozzles arranged in a specific pattern (p=2s spacing) that corresponds to the subpixel array geometry. The nozzle arrangement and spacing are predetermined to match the required color pattern, eliminating the need for recalibration between color deposits. This preliminary configuration enables continuous printing of multiple colors without interruption for realignment.
Principle concept:
If multiple colors are printed sequentially with recalibration and realignment, then color accuracy is improved, but production time increases
Why choose this principle:
The printing head is divided into multiple nozzles (z=3n1), with each nozzle assigned to deposit a specific color in a regular alternating pattern. This segmentation allows simultaneous deposition of multiple colors in their correct positions within the subpixel array, eliminating sequential printing and the associated recalibration steps between different color layers.
Application Domain
Data Source
AI summary:
A process involving a printing head with nozzles arranged in a specific pattern and spacing, where q colors are printed using a regular alternating pattern, and r colors are applied using a non-printing method, allowing for efficient formation of a regular array of subpixels with reduced recalibration and realignment requirements.
Abstract
There is provided a process of forming a regular array of rows of subpixels on a workpiece. The subpixels having 3 different colors, and a subpixel pitch s. Of the three colors, q colors are formed by printing and r colors are formed by a non-printing method. The process includes the steps: (1) providing a printing head having z nozzles arranged in a row with a spacing between the nozzles of p, where z=3n 1 and p=2s, the printhead being at a first position relative to the workpiece; (2) providing q different printing inks, one for each of the q printed colors; (3) supplying each of the printing inks to the nozzles in a regular alternating pattern; (4) printing a first set of z rows of subpixels with the printing head; (5) moving and printing in a first pattern with the steps: (a) moving the workpiece laterally relative to the printing head by a distance d 1 , where d 1 =3n 2 ; and (b) printing a set of z rows of subpixels with the printing head; (6) moving and printing in a second pattern with the steps: (c) moving the workpiece laterally relative to the printing head by a distance d 2 , where d 2 =3n 3 , such that d 1 +d 2 =pz; and (d) printing a set of z rows of subpixels with the printing head; (7) repeating steps (5) and (6) multiple times in the same order; and (8) applying r colors by a non-printing method. Variables include: n 1 , an integer greater than 0; n 2 and n 3 , odd integers, such that n 2 +n 3 =2n 1 ; q, an integer from 1-3; and r, an integer, such that q+r=3.