Electroluminescence Display Repair Lines for Aperture Ratio
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Solution Overview
Problem
Conventional repair methods for electroluminescence displays risk aperture ratio loss and require structures to be cut away or removed, leading to inefficiencies in production yield and tact time.
Innovation Solution
The introduction of repair lines that have one side with a contact point and the other side without contact with electrodes of adjacent subpixels, allowing for electrical connection without needing to cut or remove existing structures, thereby improving production yield and tact time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional repair methods are used to repair defective subpixels, then repair can be achieved, but aperture ratio is reduced and production yield decreases
Solution Approach 1:
The invention divides the repair function into separate repair lines that are spatially distinct from the light-emitting areas of subpixels. These repair lines are positioned in non-light-emitting regions, allowing repair operations to be performed on defective subpixels without encroaching on the aperture area. The segmentation separates the repair infrastructure from the display functional areas, resolving the contradiction between repair capability and aperture ratio maintenance.
Solution Approach 2:
The invention transitions the repair structures from occupying the same two-dimensional plane as the light-emitting areas to utilizing a third dimension by positioning repair lines in overlapping layers or non-light-emitting regions. This dimensional repositioning allows repair lines to coexist with subpixels without reducing the light-emitting aperture, as they occupy different spatial zones within the display structure.
2Ease of repair
If conventional repair methods are used, then defective subpixels can be repaired, but production tact time increases due to required structure cutting and removal
Solution Approach 1:
The invention performs preliminary action by pre-configuring repair lines during the manufacturing process that extend to adjacent subpixels. These repair lines are established before any defects occur, allowing immediate repair operations without requiring post-manufacturing structure cutting or removal. The preliminary establishment of repair pathways eliminates time-consuming modification steps, directly improving production tact time while maintaining repair capability.
Solution Approach 2:
The invention extracts the repair function from the main manufacturing flow by creating dedicated repair lines that are separate from the primary display structures. This extraction allows repair operations to be performed independently without interrupting or requiring modification of the main production process, thereby maintaining high production yield and tact time efficiency while preserving full repair capability.
3Productivity
If repair lines are added to enable repair without structure removal, then production yield improves, but device complexity increases
Solution Approach 1:
The invention applies universality by designing repair lines that can serve multiple subpixels simultaneously. A single repair line can be shared by multiple adjacent subpixels, allowing one repair infrastructure element to perform multiple repair functions. This multi-functionality reduces the overall number of repair structures needed compared to having dedicated repair lines for each subpixel, thereby improving production yield while limiting the increase in device complexity.
Solution Approach 2:
The invention merges repair line functions by allowing adjacent repair lines to be combined or shared between multiple subpixels. Instead of creating entirely separate repair pathways for each subpixel, the design combines repair resources so that one repair line can service multiple subpixels. This merging approach maintains high production yield through effective repair capability while reducing structural complexity by minimizing the total number of repair line elements required.
Data Source
AI summary
The present disclosure provides an electroluminescence display comprising: a first substrate; subpixels arranged on the first substrate; and repair lines located on the first substrate, one for at least every two subpixels that emit light of the same color and are adjacent to each other, wherein the repair lines comprise one side having a contact point with an electrode of a first subpixel and the other side having a non-contact point with an electrode of a second subpixel.