Vacuum Chamber Tilt for Display Panel Bubble Removal
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Solution Overview
Problem
The existing attachment devices for display panels under vacuum environments often result in bonding defects due to air bubbles trapped in the adhesive layer, which are difficult to remove, leading to high defectiveness ratios and reduced productivity.
Innovation Solution
An attachment device with a vacuum chamber unit that includes a dam jig for sealing the display panel's peripheral surface, a movable attachment base for pressing the object to be attached, and a chamber inclination device to remove bubbles generated during adhesive hardening by placing a non-sealed portion at the standing upper end of the panel, allowing bubbles to escape under vacuum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If attachment is performed under vacuum environment to prevent air bubbles, then bonding quality is improved, but solvent bubbles generated during adhesive hardening still cause defectiveness
Solution Approach 1:
The invention introduces a time dimension to the attachment process by performing a second attachment operation after the adhesive has hardened. This sequential approach in time allows the first attachment to establish initial bonding while the second attachment eliminates bubbles that formed during hardening, thereby resolving the contradiction between initial bonding quality and final defectiveness ratio
Solution Approach 2:
The invention applies preliminary action by performing the first attachment operation before the adhesive fully hardens, establishing the initial bond. Then, after hardening occurs and bubbles form, a second attachment operation is performed to remove these bubbles. This two-stage preliminary action sequence addresses both the initial bonding requirement and the final quality requirement
2Productivity
If multiple attachment processing stages are performed simultaneously to improve productivity, then output is improved, but device complexity increases
Solution Approach 1:
The invention segments the attachment process into distinct stages: a first attachment stage for initial bonding and a second attachment stage for bubble removal after hardening. By dividing the overall process into separate sequential operations rather than attempting to perform all functions simultaneously, the system achieves high productivity through efficient time utilization while avoiding the complexity of simultaneous multi-function mechanisms
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 solution effectively reduces the defectiveness ratio of the attachment by ensuring bubbles are removed from the attachment surface, improving the productivity of the attachment process by simplifying the structure and reducing the drive load, while allowing parallel execution of preparation, attachment, and air removal tasks.
Implementation Method 1
a vacuum source that exhausts air in a vacuum chamber unit (3)
Implementation Method 2
the vacuum chamber unit (3) is brought into a standing posture by a chamber inclination device, the non-sealed portion (34) is placed at a standing upper end of the display panel (P1), and bubbles generated on an attachment surface are removed from the non-sealed portion (34)
Data Source
AI summary
The present invention is to provide an attachment device of a display panel capable of, while solving enclosure of bubbles in an attachment surface at the time of attachment, reliably removing bubbles generated even after attachment, and remarkably lowering a defectiveness ratio of an attachment body to improve productivity of attachment tasks. A vacuum chamber unit 3 is formed by a chamber main body 10 and a chamber lid body 11. A fixed attachment base 12 including a dam jig 13 is provided in an interior of the chamber main body 10, and a movable attachment base 16 is provided in an interior of the chamber lid body 11. After a display panel P1 and an object to be attached P2 loaded to the dam jig 13 and the movable attachment base 16 are attached under a vacuum environment, the vacuum chamber unit 3 is brought into an inclined posture by a chamber inclination device, a non-sealed portion 34 not sealed by the dam jig 13 is placed at an inclination upper end of the display panel P1, and bubbles generated on an attachment surface in a process of hardening an adhesive are removed from the non-sealed portion 34.