Laser Irradiation System for Uniform Sealant Hardening
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Solution Overview
Problem
Conventional laser irradiation systems fail to uniformly harden sealants in display panel manufacturing due to constant output and speed, leading to non-uniform energy distribution and potential defects in bonding and sealing.
Innovation Solution
A laser irradiation system that adjusts output and speed in real-time based on the geometry of the target area, with the laser transfer unit controlling speed and the laser output controller adjusting energy levels according to section types, ensuring uniform energy distribution by positioning the light's center closer to the outer periphery in curved sections and reducing output in high conductivity areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If constant laser output and speed are used, then the system structure is simple, but non-uniform energy distribution occurs leading to defective hardening
Solution Approach 1:
The target irradiation area is divided into multiple sections (linear sections and curved sections) with different characteristics. The controller applies different laser outputs and transfer speeds to each section type, ensuring uniform energy distribution across the entire area while maintaining manageable system complexity through categorical segmentation rather than continuous adjustment.
Solution Approach 2:
Different laser parameters (output and transfer speed) are applied to different sections of the target area based on their geometric characteristics. Curved sections receive different treatment than linear sections, with the light center positioned closer to the outer periphery in curved sections to compensate for the longer path length and achieve uniform hardening across the entire sealant area.
2Productivity
If laser transfer speed is increased in high conductivity sections, then productivity improves, but energy distribution becomes non-uniform
Solution Approach 1:
The laser transfer speed is dynamically adjusted based on the conductivity characteristics of different sections. High conductivity sections allow for faster transfer speeds due to better heat dissipation, while low conductivity sections use slower speeds to ensure adequate energy absorption. This dynamic adjustment maintains both productivity and uniformity by adapting to local material properties.
3Manufacturing precision
If laser output is increased to compensate for curved section path length, then energy distribution becomes non-uniform, causing defects
Solution Approach 1:
The system applies different laser outputs to different section types rather than using a uniform output. Curved sections receive appropriately reduced output compared to linear sections, preventing over-irradiation defects while ensuring adequate hardening. This local quality approach tailors the irradiation parameters to the specific geometric characteristics of each section.
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 system achieves uniform hardening of the sealant across the display panel, minimizing defects and ensuring stable bonding and sealing by dynamically adjusting laser output and speed according to the target area's geometry and conductivity sections.
Implementation Method 1
The laser irradiation system may be used to harden the sealant by irradiating light onto the sealant between the pair of substrates
Data Source
AI summary
A laser irradiation system includes a laser configured to irradiate light, a laser transfer unit configured to transfer the laser along a target irradiation area, the target irradiation area being divided into a plurality of sections, a laser transfer controller configured to control a speed of the laser in each of the plurality of sections of the target irradiation area, a laser output controller configured to control an output level of the laser in each of the plurality of sections of the target irradiation area, and a main controller configured to control the laser output controller and the laser transfer controller.