Display Panel Light Shielding Part Laser Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display panel manufacturing processes face challenges in achieving high yield and reliability, particularly in reducing the non-display area (bezel) to increase the display-to-surface area ratio, while maintaining structural integrity and preventing short-circuit failures during the cutting process.
Innovation Solution
The display panel design incorporates a light shielding part between the substrates and protruding portions, with the light shielding part and protruding portions connected and spaced apart by less than 4 μm, to block laser irradiation during coupling and cutting, ensuring precise alignment and minimizing electrostatic discharge, and includes a coupling member with varying coupling forces to prevent short-circuit failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the non-display area is reduced to increase display-to-surface area ratio, then the display area ratio is improved, but the structural integrity and reliability deteriorate
Solution Approach 1:
The coupling member is divided into multiple segments with varying coupling forces along its length. The first coupling force in the first region is greater than the second coupling force in the second region, allowing different sections to provide different levels of structural support. This segmentation enables the bezel area to be reduced while maintaining overall structural integrity through strategically distributed coupling strength.
Solution Approach 2:
Different regions of the coupling member are designed with different coupling force characteristics. The first region provides stronger coupling force for critical structural support, while the second region provides sufficient but reduced coupling force. This local quality variation allows the structure to maintain reliability in critical areas while permitting reduced bezel dimensions in less critical areas.
2Productivity
If the coupling member is irradiated with laser during cutting, then the cutting process is efficient, but short-circuit failures occur
Solution Approach 1:
A light shielding part is introduced as an intermediary element between the laser cutting tool and the coupling member. This light shielding part selectively blocks laser irradiation from reaching the coupling member during the cutting process, preventing short-circuit failures while allowing the cutting operation to proceed efficiently. The light shielding part acts as a mediator that protects sensitive components from harmful laser exposure.
3Object-affected harmful factors
If the light shielding part is placed close to protruding portions to block laser, then laser blocking is effective, but electrostatic discharge risk increases
Solution Approach 1:
The light shielding part is designed to be electrically separated from the protruding portions by introducing a gap or insulating structure between them. This extraction of electrical connectivity while maintaining spatial proximity allows the light shielding part to effectively block laser irradiation from the coupling member without creating a conductive path that could lead to electrostatic discharge. The electrical connection is removed while the physical positioning for laser blocking is preserved.
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 design enhances manufacturing yield and reliability by reducing the non-display area, improving structural strength, and preventing short-circuit failures, resulting in a display panel with a narrow bezel and improved external impact resistance.
Implementation Method 1
a light shielding part disposed between the edge of the second substrate and the plurality of sensing pads to overlap at least a portion of the coupling member
Data Source
AI summary
A display panel including a first substrate, a second substrate disposed on the first substrate, a coupling member disposed between the first substrate and the second substrate to couple the first substrate and the second substrate, a plurality of sensing patterns disposed on the second substrate, a plurality of sensing pads disposed on the second substrate and electrically connected to the sensing patterns, respectively, a plurality of protruding portions disposed on the second substrate and extending from the sensing pads, respectively, to an edge of the second substrate, and a light shielding part disposed between the edge of the second substrate and the sensing pads to overlap at least a portion of the coupling member.