Laser Irradiation Apparatus Refraction for Uniform Crystallization
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Solution Overview
Problem
Laser irradiation apparatuses often produce crystallization abnormalities, such as streaks or lines, due to defects like lens contamination or cracks, resulting in non-uniform crystallization quality in display devices.
Innovation Solution
A laser irradiation apparatus comprising a laser module, a first optical system for scanning the laser beam, and an optical element that refracts the beam, with a substrate supporter for uniform irradiation of the base substrate, allowing for controlled scanning and tilt adjustments to maintain parallelism and uniformity of scan lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser beam is scanned directly without optical element refraction, then scanning speed is high, but crystallization uniformity deteriorates due to abnormalities appearing as streaks or lines
Solution Approach 1:
An optical element is introduced as an intermediary between the laser beam and the base substrate. This optical element refracts the laser beam so that scan line abnormalities (streaks or lines) are scattered across different locations, preventing concentrated defects while maintaining high scanning speed.
Solution Approach 2:
The patent converts the harmful effect of scan line abnormalities by using refraction to scatter them. Instead of allowing abnormalities to appear as concentrated streaks or lines, the optical element disperses them across multiple locations, transforming a defect into a non-visible or less severe condition.
2Manufacturing precision
If optical element is added to refract laser beam, then crystallization uniformity is improved, but device complexity increases
Solution Approach 1:
A simple optical element serving as a mediator is added to the system. This element performs the refraction function to scatter scan line abnormalities without requiring complex optical systems, thus improving crystallization uniformity while minimizing the increase in device complexity.
3Device complexity
If laser beam is scanned without refraction, then device complexity is low, but visual defects increase in final product
Solution Approach 1:
An optical element is introduced as a simple intermediary that refracts the laser beam to scatter scan line abnormalities. This prevents visual defects in the final product while adding minimal complexity to the optical system.
Solution Approach 2:
The optical element converts the harmful scan line abnormalities into scattered, non-visible defects through refraction, thereby eliminating visual defects in the final product with minimal added complexity.
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 solution ensures a relatively uniform crystallization quality across the display device, minimizing visual defects and improving the overall quality of the final product even when defects like lens contamination or cracks are present in the apparatus.
Implementation Method 1
an optical element that refracts the laser beam emitted from the first optical system
Data Source
AI summary
A laser irradiation apparatus includes: a laser module configured to emit a laser beam; a first optical system configured to scan the laser beam emitted from the laser module along a first direction; an optical element configured to refract the laser beam emitted from the first optical system; and a substrate supporter on which a base substrate to which the laser beam refracted through the optical element reaches is arranged.