Multi-Carriage Liquid Droplet Ejection Device for Large Substrates
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Solution Overview
Problem
Existing liquid droplet ejection devices face productivity issues when handling large glass substrates due to the long shifting distance of the carriage, which hampers efficient liquid ejection and manufacturing of large-sized electro-optical devices.
Innovation Solution
A liquid droplet ejection device with a table that shifts in two directions intersecting at right angles, featuring multiple carriages with heads that can be precisely positioned and aligned along a second direction, allowing for accurate and efficient liquid ejection across large workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single carriage with head is used for liquid ejection, then the device structure is simple, but the productivity decreases due to long shifting distance required for large glass substrates
Solution Approach 1:
The device is divided into multiple carriages (first carriage, second carriage, etc.), each equipped with a head capable of liquid ejection. These carriages are arranged side by side along the second direction, allowing parallel or sequential processing of different regions of the large glass substrate, thereby reducing the total time required and improving productivity without requiring excessive shifting distance.
2Area of stationary object
If the carriage shifts long distance to cover entire surface of large glass substrate, then the coverage area is sufficient, but the time required increases and productivity deteriorates
Solution Approach 1:
Instead of relying solely on linear shifting along one direction to cover the entire substrate area, the invention introduces multiple carriages arranged in the second direction (perpendicular to the primary shifting direction). This multi-dimensional arrangement allows the system to cover large areas by distributing ejection tasks across multiple heads simultaneously, significantly reducing the time required compared to a single carriage traversing the entire distance.
3Productivity
If multiple carriages are introduced to improve productivity, then the ejection speed increases, but the positioning precision and mutual alignment become more difficult
Solution Approach 1:
The invention replaces complex mechanical positioning mechanisms with a field-based control approach. A control unit coordinates the movement and positioning of multiple carriages based on programmed instructions, allowing precise control of each carriage's position and movement along the second direction. This electronic control system achieves high positioning precision without requiring complex mechanical alignment mechanisms.
Data Source
AI summary
A liquid droplet ejection device for ejecting a liquid from a nozzle of a head to a workpiece, the liquid droplet ejection device including: a table for loading the workpiece; a first shifting section capable of shifting the table in a first direction and in a second direction approximately intersecting the first direction at a right angle; a plurality of carriages having the head; and a second shifting section capable of positioning each of the carriages by mutually shifting each of the carriages along the second direction.