Overlapping Initialization Lines in Display Devices
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Solution Overview
Problem
Organic light emitting display devices face increased dead space due to the placement of drivers and initialization lines in the peripheral area, which affects the overall efficiency and compactness of the display.
Innovation Solution
The display device incorporates a substrate with a pixel area and a peripheral area, featuring overlapping first and second initialization lines that provide distinct voltages to the pixels, strategically positioned to minimize dead space by integrating these lines within the driver unit and overlapping them to reduce the peripheral area width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drivers and initialization lines are disposed in the peripheral area, then pixel functionality is achieved, but dead space increases
Solution Approach 1:
The first initialization line and second initialization line are merged by making them overlap with each other in the peripheral area. This combining approach allows both lines to occupy the same spatial region, thereby reducing the overall dead space while maintaining the functionality of providing different initialization voltages to the pixels.
Solution Approach 2:
The initialization lines are arranged in different layers (first initialization line on second insulation layer, second initialization line on third insulation layer), utilizing the vertical dimension to accommodate multiple lines in the same planar footprint. This multi-layer stacking enables reduced dead space while preserving electrical functionality.
2Ease of manufacture
If first initialization line and second initialization line are separated, then voltage provision is simplified, but peripheral area width increases
Solution Approach 1:
The patent utilizes the vertical dimension by stacking the first initialization line on the second insulation layer and the second initialization line on the third insulation layer. This multi-layer arrangement allows both lines to be closely positioned without electrical interference, reducing the peripheral area width while maintaining manufacturing simplicity through standardized layering.
3Area of stationary object
If initialization lines are overlapped, then dead space is reduced, but line complexity increases
Solution Approach 1:
The initialization lines are segmented into different layers (second insulation layer and third insulation layer) to manage the complexity of overlapping configurations. This segmentation allows each line to be independently routed and connected while maintaining a compact overall structure, reducing dead space without excessive complexity.
Solution Approach 2:
By moving the overlapping lines to different vertical layers, the patent reduces planar complexity while achieving space efficiency. The multi-layer configuration simplifies the routing logic compared to trying to weave lines in the same plane, as each layer can be independently processed.
Data Source
AI summary
A display device includes a substrate including a pixel area and a peripheral area, a plurality of pixels disposed in the pixel area of the substrate, a first initialization line disposed in the peripheral area of the substrate, the first initialization line being configured to provide a first initialization voltage to the plurality of pixels, and a second initialization line disposed in the peripheral area of the substrate, the second initialization line being configured to provide a second initialization voltage to the plurality of pixels. At least a portion of the first initialization line may overlap with the second initialization line.