Laser Beam Mixing Apparatus for Uniform OLED Sealing
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Solution Overview
Problem
Laser beam mixing apparatuses struggle to achieve uniform energy distribution across the core of optical cables, leading to lower beam quality and inefficient sealing of organic light-emitting diode (OLED) displays, particularly when using multi-core optical cables which produce dispersed beam patterns.
Innovation Solution
A laser beam mixing apparatus comprising a barrel to convert a laser beam bundle from a multi-core optical cable into a single beam and a stage to adjust the position and angle of a single-core optical cable, ensuring the core aligns with the center of the single beam, thereby maintaining uniform energy density for improved sealing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a multi-core optical cable is used to transmit laser beams, then the cable can handle higher power and broader applications, but the beam quality deteriorates due to dispersed beam patterns and non-uniform energy distribution
Solution Approach 1:
The patent combines multiple laser beams from a multi-core optical cable into a single unified beam pattern through precise optical alignment. The optical lens system merges the dispersed beams from different cores, and the alignment mechanism ensures they converge at the same focal point, creating a unified beam with uniform energy distribution that maintains high beam quality while utilizing the high power capacity of multi-core cables.
Solution Approach 2:
The patent introduces an optical lens and alignment mechanism as intermediary components between the multi-core optical cable and the workpiece. This intermediary system transforms the dispersed beam pattern from the multi-core cable into a uniform single beam pattern, mediating the transition from low-quality multi-core output to high-quality processing beam while preserving the power advantages of the multi-core cable.
2Productivity
If laser beam sealing is performed on OLED displays, then the sealing process is fast and precise, but non-uniform energy distribution causes defects such as bubbles and cracks in the sealant
Solution Approach 1:
The patent applies local quality adjustment by ensuring uniform energy distribution across the entire sealing region through precise optical alignment. The alignment mechanism adjusts the optical lens position and angle to distribute laser energy uniformly across different areas of the sealant, preventing localized overheating that would cause bubbles and cracks while maintaining the fast sealing speed needed for productivity.
Solution Approach 2:
The patent changes the optical parameters of the laser beam delivery system by adjusting the position and angle of the optical lens. This parameter adjustment transforms the non-uniform beam pattern into a uniform distribution pattern across the sealing region, ensuring consistent energy delivery that prevents sealing defects while maintaining high processing speed.
3Device complexity
If the optical lens is fixed in position, then the device structure is simple, but the beam cannot be properly aligned with the single-core optical cable core, resulting in non-uniform energy distribution
Solution Approach 1:
The patent implements dynamic adjustability in the optical lens mounting structure, allowing the lens position and angle to be adjusted during setup and alignment procedures. This dynamic capability enables precise alignment of the laser beam with the single-core optical cable core, achieving uniform energy distribution while keeping the overall device structure relatively simple through minimal adjustable components.
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 apparatus achieves uniform energy distribution across the sealing region of OLED displays, enhancing sealing quality by preventing bubbles and cracks in the sealant, resulting in a more reliable and efficient bonding process.
Implementation Method 1
a barrel to adjust a distance between a multi-core optical cable and an optical lens included therein, to convert a laser beam bundle into a single beam
Implementation Method 2
heating a sealant provided between a front substrate and a rear substrate of the OLED display, using the laser beam transmitted through the single-core optical cable, to bond the front substrate and the rear substrate to each other
Data Source
AI summary
A laser beam mixing apparatus to convert a laser beam bundle into a single laser beam having a uniform energy density. The laser beam mixing apparatus includes: a barrel to adjust a distance between a multi-core optical cable and an optical lens included therein, to convert a laser beam bundle into a single beam; and a stage to adjust the position and angle a single-core optical cable with respect to the optical lens, to align the core of the single-core optical cable with the center of the single beam.