Display Sealing Structure Using Protective Welding for Side Gaps
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Solution Overview
Problem
Current display devices, particularly head-mounted displays, face challenges in effectively protecting the light emitting element layer from environmental factors due to gaps between the substrate and the cover window, leading to reliability issues.
Innovation Solution
A display device design that incorporates a welding part made of silicon wafer and glass, covering at least one side surface of the light emitting element layer, and optionally a sealant, to create a robust seal between the substrate and the cover window, using lasers to form the welding part and cut the substrates, enhancing the protection and reliability of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealant is used to protect the light emitting element layer, then the protection of side surfaces is improved, but the manufacturing complexity increases due to separate formation processes
Solution Approach 1:
The patent merges the sealing function and the structural support function into a single welding part. The welding part is formed by simultaneously welding the substrate and cover window, creating an integrated structure that provides both mechanical support and environmental sealing for the light emitting element layer, eliminating the need for separate sealant application processes
Solution Approach 2:
The welding part serves multiple functions: it provides structural support by connecting the substrate and cover window, seals the side surfaces of the light emitting element layer against environmental factors, and acts as a mounting structure. This multi-functional design reduces the number of separate components and simplifies manufacturing
2Ease of manufacture
If gaps exist between substrate and cover window, then manufacturing is easier, but environmental protection of the display part deteriorates
Solution Approach 1:
The welding part acts as an intermediary structure that fills and seals the gaps between the substrate and cover window. By forming a welded connection that extends along the side surfaces, it creates a barrier against environmental factors while maintaining the ease of manufacturing through simultaneous formation with the substrates
3Reliability
If separate sealant formation is used, then sealing is achieved, but production time increases
Solution Approach 1:
The welding part is formed in advance as part of the substrate and cover window assembly process. By simultaneously welding the substrates and forming the sealing structure in the same operation, the sealing action is performed preliminarily before final assembly, eliminating subsequent sealant application steps and improving production efficiency
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 effectively seals the gaps between the substrate and the cover window, increasing the reliability and protection of the display device, simplifying the manufacturing process, and enhancing the display's durability and performance.
Implementation Method 1
The simultaneously welding of the mother substrate and the mother glass substrate may be performed using a first laser
Implementation Method 2
The forming of the substrate, the forming of the cover window, and the forming of the welding part may include cutting the mother substrate, the mother glass substrate, and the preliminary welding part along the preliminary welding part
Data Source
AI summary
A display device includes a substrate. A light emitting element layer is disposed on the substrate and includes a plurality of light emitting diodes. A welding part is disposed on the substrate, covering at least one side surface of the light emitting element layer. and the welding part includes a silicon wafer of the substrate and glass of the window part. A cover window is disposed on the welding part and the light emitting element layer.