Display Panel Active Layer Discontinuity for Transistor Uniformity
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Solution Overview
Problem
The integration of optical components like cameras under the display screen leads to uneven display effects due to differences in transistor characteristics between the display areas, causing screen split issues.
Innovation Solution
A display panel design with discontinuity points in the active layers of sub-pixels between or within adjacent sub-pixels in both display areas, allowing for uniform display effects by reducing differences in transistor characteristics and using materials like polycrystalline silicon for improved carrier mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical components are hidden under the screen to achieve full-screen display, then the display area is increased and full-screen effect is achieved, but the transistor characteristics become uneven between different display areas causing screen split
Solution Approach 1:
The patent introduces discontinuity points in the active layers of pixel circuits at specific locations (between adjacent sub-pixels or within sub-pixels) to create local structural variations. This allows different regions of the display panel to have optimized transistor characteristics suited for their specific functions, compensating for the uneven characteristics caused by hiding optical components under the screen.
2Ease of manufacture
If the active layers are made continuous to ensure signal transmission, then the manufacturing is simpler, but the differences in transistor characteristics between display areas increase causing screen split
Solution Approach 1:
The patent segments the continuous active layer by introducing discontinuity points at specific positions. This segmentation creates distinct regions with optimized transistor characteristics while maintaining electrical connectivity through alternative paths, thereby reducing characteristic differences between display areas without completely breaking the continuity of the active layer structure.
3Manufacturing precision
If discontinuity points are introduced in active layers to reduce transistor characteristic differences, then screen split is avoided, but the manufacturing complexity increases
Solution Approach 1:
The patent applies discontinuity points only at specific critical locations (between adjacent sub-pixels or within specific sub-pixels) rather than throughout the entire active layer. This partial application of the discontinuity concept achieves the goal of reducing transistor characteristic differences while minimizing the increase in manufacturing complexity.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a first display area and a second display area. The first display area at least partially surrounds the second display area, and the second display area is configured to provide a photosensitive element. The first display area and the second display area are each provided with multiple sub-pixels. Each of the multiple sub-pixels includes a pixel circuit and a light emitting element. In each of the first display area and the second display area, active layers of the pixel circuits of the sub-pixels in each column have discontinuity points. The discontinuity point is located between respective two adjacent sub-pixels in the same column, or is located within each sub-pixel.