Adhesive Application Apparatus for Flat Panel Displays
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Solution Overview
Problem
The challenge lies in efficiently applying a delayed-ultraviolet-curable adhesive to flat panel displays without inhibiting its curing, particularly due to issues like UV light shielding by adherends and non-uniform application, which can lead to incomplete bonding and the generation of catalytic poisons.
Innovation Solution
An adhesive application apparatus comprising a mounting table, an adhesive dosing unit, and an ultraviolet irradiation unit that applies the adhesive and irradiates it with UV light along the mounting surface before application, minimizing direct UV exposure to the panels and ensuring uniform curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet light is irradiated to the adherend before adhesive application, then curing of the adhesive is promoted, but alteration of the adherend occurs and catalytic poisons are generated
Solution Approach 1:
The adhesive is irradiated with ultraviolet light in advance before application to the adherend, so that the adhesive becomes pre-cured or partially cured. This preliminary action ensures that when the adhesive is subsequently applied to the adherend, the curing process is already initiated, preventing the need for post-application irradiation that would cause adherend alteration.
Solution Approach 2:
The patent introduces an intermediary step where the adhesive is irradiated separately before application, acting as a mediator between the ultraviolet light source and the adherend. This separates the curing function from the adherend exposure, allowing UV irradiation to occur without directly affecting the adherend material.
2Reliability
If ultraviolet light is irradiated to the adherend after adhesive application, then curing of the adhesive is achieved, but catalytic poisons are generated in the adherend
Solution Approach 1:
The adhesive is pre-irradiated with ultraviolet light before application to the adherend, initiating the curing process in advance. This preliminary action ensures that the adhesive contains sufficient reactive species or is in a state ready for curing, eliminating the need for post-application UV irradiation that would generate catalytic poisons in the adherend.
Solution Approach 2:
The patent uses the adhesive itself as an intermediary carrier that can be irradiated independently. By making the adhesive the intermediate step that absorbs and utilizes the UV energy before contact with the adherend, the system achieves curing without forcing UV exposure onto the adherend, thus preventing catalytic poison generation.
3Reliability
If adhesive is dosed to adherend and then irradiated with ultraviolet light, then curing occurs, but non-uniform application and incomplete bonding result
Solution Approach 1:
The adhesive is irradiated with ultraviolet light in a controlled pre-treatment step before being dosed onto the adherend. This preliminary irradiation ensures uniform curing characteristics throughout the adhesive layer, and when the adhesive is subsequently applied to the adherend, the curing process continues uniformly, eliminating non-uniform application and incomplete bonding issues.
Solution Approach 2:
The patent segments the process into distinct stages: pre-irradiation of the adhesive, dosing of the adhesive to the adherend, and continued curing. This segmentation allows each step to be optimized independently, ensuring that the irradiation occurs uniformly across the adhesive before application, thereby preventing non-uniform curing and bonding defects.
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 approach enables efficient adhesive application without inhibiting curing, preventing alterations and catalytic poison generation, thus ensuring robust and uniform bonding of flat panel displays.
Implementation Method 1
the ultraviolet irradiation unit irradiates the adhesive with the ultraviolet light along the mounting surface before the adhesive dosed from the adhesive dosing port is applied to the surface of the panel
Data Source
AI summary
There is provided an adhesive application apparatus capable of efficiently applying an adhesive without inhibiting curing of the adhesive. An adhesive application apparatus of the present invention includes a mounting table 10, an adhesive dosing unit 20, and an ultraviolet irradiation unit 30, and it applies a delayed-ultraviolet-curable adhesive 200 to a surface of a panel 100. The panel 100 is mounted on a mounting surface S10 of the mounting table 10. The adhesive dosing unit 20 applies the adhesive 200 to the surface of the panel 100 mounted on the mounting table 10 by discharging the adhesive 200 from an adhesive dosing port H20. The ultraviolet irradiation unit 30 irradiates the adhesive 200 dosed from the adhesive dosing port H20 with ultraviolet light L. Here, the ultraviolet irradiation unit 30 irradiates the adhesive 200 with the ultraviolet light L along the mounting surface S10 before the adhesive 200 dosed from the adhesive dosing port H20 is applied to the surface of the panel 100.