LED Display Pad Layout for Reusable Pixel Repair
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Solution Overview
Problem
Current light emitting diode (LED) display apparatuses face challenges in quick repair without relying on redundancy, particularly in saving crystal grains and maintaining efficiency.
Innovation Solution
The display apparatus features a driving substrate with specific pad configurations allowing for easy connection and reconfiguration of light emitting diode elements, enabling efficient transfer and reuse of diodes for quick repair and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If traditional LED display manufacturing is used, then display quality is achieved, but repair difficulty increases and redundancy is required
Solution Approach 1:
The driving substrate is divided into multiple driving regions, each with independent pad structures. This segmentation allows individual regions to be repaired without affecting the entire display, enabling localized repair operations while maintaining overall display quality.
Solution Approach 2:
The pad structures are designed with universal connectivity features, where pads can serve multiple functions including initial LED connection, repair connection, and reconfiguration. This multi-functionality enables the same pad structure to support both manufacturing and repair operations, eliminating the need for separate repair infrastructure.
2Ease of repair
If redundancy is used for repair, then repair capability is improved, but crystal grain usage increases
Solution Approach 1:
The patent enables recovery and reuse of LED crystal grains through the specialized pad structure. When LEDs fail, they can be removed and replaced with crystals from the buffer region or previously removed locations. This recovering approach reduces the need for continuous redundancy while maintaining repair capability.
Solution Approach 2:
A buffer region is prepared in advance during manufacturing, containing spare crystal grains that can be used for future repairs. This preliminary preparation ensures repair capability without requiring excessive redundancy in the operational display areas, optimizing crystal grain usage.
3Ease of manufacture
If pad structures are simplified, then manufacturing ease is improved, but repair flexibility deteriorates
Solution Approach 1:
The pad structures employ asymmetric design where certain pads have extended connections or additional contact points specifically oriented for repair operations. This asymmetric configuration maintains manufacturing simplicity while providing enhanced flexibility for repair operations, as the asymmetry is strategically placed only where needed.
Solution Approach 2:
The pad structure incorporates nested connectivity layers, where basic pad connections are embedded within additional repair-oriented connection layers. This nesting allows the same physical structure to provide both simple manufacturing interfaces and complex repair capabilities without increasing overall structural complexity.
Data Source
AI summary
A display apparatus includes a driving substrate and a first light emitting diode element. The driving substrate has a plurality of driving structures. Each of the driving structures includes a first pad, a second pad, a third pad and a fourth pad. The plurality of driving structures include a first driving structure. The first light emitting diode element is electrically connected to a first pad and a second pad of the first driving structure, and the first light emitting diode element crosses a line connecting a third pad and a fourth pad of the first driving structure. A manufacturing method of the display apparatus is also provided.