Laser Crack Generation for Display Panel Bezel Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for slim large-sized display devices with minimized bezel areas and superior durability, as traditional CRT devices fail to meet these requirements, and existing flat-panel displays face challenges in accurately cutting and sealing substrates to achieve a narrow bezel without compromising reliability.
Innovation Solution
A method involving a mother substrate with a display area and non-display area, where a crack is generated in the sealant between substrates using laser irradiation, allowing for precise cutting with a cutting wheel to remove excess sealant and substrates, thereby minimizing the bezel area while ensuring reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional cutting methods are used to minimize the bezel area, then the bezel area is reduced, but the cutting precision and sealing reliability deteriorate
Solution Approach 1:
The patent applies preliminary action by generating a crack in the sealant before the cutting wheel makes contact. The laser creates a pre-existing crack that guides the cutting wheel along a precise path, ensuring accurate cutting while maintaining sealing reliability. This preliminary crack generation enables the cutting wheel to follow a predetermined trajectory, achieving both minimal bezel area and high cutting precision.
Solution Approach 2:
The patent uses a laser-generated crack as an intermediary between the cutting wheel and the sealant. This crack acts as a guide that mediates the cutting process, allowing the cutting wheel to achieve precise cuts without directly forcing through the sealant, thereby maintaining both cutting precision and sealing integrity.
2Area of stationary object
If conventional cutting methods are used to minimize the bezel area, then the bezel area is reduced, but the sealing reliability deteriorates
Solution Approach 1:
The laser generates a controlled crack in the sealant before cutting, creating a predetermined failure path. This preliminary action ensures that when the cutting wheel passes through, the crack propagates along the desired line without causing uncontrolled damage to the sealing structure, thereby maintaining sealing reliability while achieving minimal bezel area.
Solution Approach 2:
The patent converts the potentially harmful effect of crack propagation into a beneficial guiding mechanism. By intentionally creating a crack with laser irradiation, the system transforms what would normally be a defect into a precise cutting guide, ensuring that the cut follows the exact desired path while preserving the overall sealing integrity of the display panel.
3Manufacturing precision
If laser irradiation is used to generate cracks in the sealant, then cutting precision is improved, but the process complexity increases
Solution Approach 1:
The patent merges two operations into one integrated process: the laser irradiation that generates the crack and the subsequent cutting wheel operation. By combining these steps, the system achieves high cutting precision without requiring separate complex positioning and cutting systems, as the laser-prepared crack path guides the simpler cutting wheel operation.
Solution Approach 2:
The patent replaces complex mechanical positioning and force-application systems with a laser-based approach. Instead of using complex mechanical guides to achieve precise cutting paths, the system uses laser irradiation to create a optical/thermal guide (the crack) that simplifies the mechanical cutting operation, thereby reducing overall process complexity while maintaining high precision.
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
This method effectively reduces the bezel area of display panels, enhancing durability and reliability by controlling the propagation of cracks for accurate cutting and sealing, addressing the limitations of existing technologies.
Implementation Method 1
generating a crack on the sealant through laser irradiation of the sealant between the first substrate and the second substrate
Implementation Method 2
generating a crack on the sealant through laser irradiation of the sealant
Data Source
AI summary
A method for manufacturing a display panel includes providing a mother substrate that includes a display area and a non-display area, and includes a first substrate, a second substrate facing the first substrate, and a sealant provided between the first substrate and the second substrate, generating a crack on the sealant through irradiation of laser onto the sealant between the first substrate and the second substrate, and cutting a part of the second substrate and a part of the sealant at a position corresponding to the crack.