Transparent Display Repair Line Layout for Defective Subpixels
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Solution Overview
Problem
Transparent display devices face challenges in integrating a repair structure for defective subpixels due to limited space, making it difficult to allocate a separate area for repair without compromising the emission and transmission areas.
Innovation Solution
The display device incorporates first electrodes, welding electrodes, and repair lines, with repair lines disposed in different layers with insulating layers in between, allowing for a minimized repair area by overlapping them, thus optimizing the allocation of emission and transmission areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate repair area is allocated for the repair structure, then defective subpixels can be repaired, but the area occupied by the repair structure increases
Solution Approach 1:
The patent merges the repair structure with existing electrode structures by making the repair line overlap with the first electrode in the plan view. This integration allows the repair function to be incorporated within the existing pixel structure rather than requiring a separate dedicated repair area, thereby reducing the overall area occupied by the repair structure while maintaining the ability to repair defective subpixels
Solution Approach 2:
The patent utilizes the third dimension (vertical stacking) by disposing the repair line and the first electrode in different layers with an insulating layer interposed between them. This layered configuration allows both structures to coexist in the same planar footprint without electrical interference, effectively using vertical space to reduce the horizontal area occupied by the repair structure
2Productivity
If the emission area and transmission area are properly allocated, then the display device functions smoothly, but there is insufficient space for the repair structure
Solution Approach 1:
The repair structure is merged with the existing electrode and insulating layer structures, allowing the repair function to be implemented without requiring additional dedicated space that would otherwise be needed for emission or transmission areas. The repair line shares the same planar space as the first electrode through overlapping configuration
Solution Approach 2:
By implementing the repair structure in a different vertical layer with an insulating layer between the repair line and the first electrode, the patent enables the repair structure to occupy the same horizontal footprint as existing display structures without interfering with emission or transmission areas, thus preserving the allocation of these critical functional areas
3Area of stationary object
If repair lines are disposed in different layers with insulating layers in between, then the area occupied by the repair structure is minimized, but the device complexity increases
Solution Approach 1:
The patent employs vertical layering to minimize the horizontal area occupied by the repair structure. By disposing the repair line and first electrode in different layers with an insulating layer between them, the repair structure can overlap with existing structures in the plan view, effectively using the third dimension to reduce the footprint while the added layering provides electrical isolation
Solution Approach 2:
The insulating layer serves multiple functions: it provides electrical isolation between the repair line and the first electrode to prevent short circuits, enables the vertical stacking configuration for area minimization, and maintains the structural integrity of the layered device. This multi-functionality justifies the added complexity by providing multiple benefits from a single structural element
Data Source
AI summary
A display device comprises a first electrode of a (1-1)-th subpixel, a first electrode of a (1-2)-th subpixel, a first electrode of a (2-1)-th subpixel, and a first electrode of a (2-2)-th subpixel; a (1-1)-th welding electrode connected to the first electrode of the (1-1)-th subpixel, a (1-2)-th welding electrode connected to the first electrode of the (1-2)-th subpixel, a (2-1)-th welding electrode connected to the first electrode of the (2-1)-th subpixel, and a (2-2)-th welding electrode connected to the first electrode of the (2-2)-th subpixel; and a first repair line overlapping the (1-1)-th welding electrode and the (2-1)-th welding electrode and a second repair line overlapping the (1-2)-th welding electrode and the (2-2)-th welding electrode, wherein the first repair line and the second repair line are disposed on different layers with at least one insulating layer interposed therebetween.