Guide Mark for Laser Sealing Positioning in Display Substrates
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Solution Overview
Problem
Existing display apparatus manufacturing methods face limitations in accurately irradiating a laser beam for forming a sealing member, leading to potential damage to the organic light-emitting device due to irregular temperature distribution and positioning errors.
Innovation Solution
Incorporating a guide mark on the second substrate, extending in the lengthwise direction of the sealing member, to accurately guide the laser beam during the formation of the sealing member, ensuring precise positioning and reducing the risk of damage to the active area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laser beam is irradiated onto the sealing member pattern without a guide mark, then the sealing member can be formed, but the positional accuracy between the laser beam and the sealing member pattern deteriorates
Solution Approach 1:
A guide mark is introduced as an intermediary element on the second substrate to mediate between the laser beam irradiation system and the sealing member pattern. The guide mark serves as a reference that enables precise positioning of the laser beam relative to the sealing member pattern, thereby improving manufacturing precision without significantly increasing overall device complexity.
Solution Approach 2:
The guide mark is formed by copying the pattern of the sealing member onto the second substrate. This copied pattern serves as a template that guides the laser beam irradiation process, ensuring that the laser beam is applied at the correct positions to form the sealing member with high positional accuracy.
2Reliability
If the laser beam irradiation position is inaccurate, then the sealing member formation process is simpler, but the organic light-emitting device may be damaged due to irregular temperature distribution
Solution Approach 1:
The guide mark is prepared in advance on the second substrate before the laser beam irradiation process. This preliminary action establishes a reference framework that ensures the laser beam will be applied at the correct positions, preventing damage to the organic light-emitting device while maintaining reliable sealing member formation.
3Manufacturing precision
If the guide mark is formed on the second substrate, then the laser beam positioning accuracy is improved, but the manufacturing process complexity increases
Solution Approach 1:
The guide mark formation process is merged with the existing manufacturing process of the second substrate. The guide mark is formed using the same patterning techniques already employed for other structures on the substrate, thereby improving laser positioning accuracy while minimizing the increase in manufacturing process 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
Improves positional accuracy of the sealing member and reduces the risk of damage to the organic light-emitting device by ensuring accurate laser beam irradiation, enhancing the sealing process and reducing dead space around the sealing member.
Implementation Method 1
melting the sealing member pattern by irradiating a laser beam onto the guide mark
Data Source
AI summary
A display apparatus includes a first substrate corresponding to an active area, and a sealing area surrounding the active area, a second substrate facing the first substrate, a display portion in the active area, a sealing member in the sealing area between the first substrate and the second substrate, and a guide mark on one surface of the second substrate in an area where the sealing member and the second substrate overlap each other.