Pixel Structure With Balanced Light Shielding for Seamless Spliced Displays
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Solution Overview
Problem
Spliced display apparatus suffer from discontinuity in the overall display screen, affecting viewing quality due to issues in splicing seams.
Innovation Solution
A display panel design with specific substrate configurations, including light-emitting elements, gate driving structures, and light-shielding traces, where the ratio of light-shielding areas is carefully balanced to minimize visual discrepancies between peripheral areas, enhancing optical performance and eliminating seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light-emitting elements are disposed on peripheral areas of substrates, then the display area is expanded, but the uniformity of brightness across different areas deteriorates due to varying light-shielding effects
Solution Approach 1:
The patent applies local quality by differentiating the light-shielding configurations in different peripheral areas. Specifically, a gate driving structure with light-shielding pattern is provided in the first peripheral area, while light-shielding traces are provided in the second peripheral area. The area ratios of these light-shielding structures are controlled to be substantially equal, creating locally optimized light transmission characteristics that match the emission characteristics of light-emitting elements in different regions, thereby achieving overall brightness uniformity across the expanded display area.
Solution Approach 2:
The patent employs parameter changes by adjusting the area ratios of light-shielding structures to match the emission characteristics of light-emitting elements. The key parameter controlled is the area ratio of light-shielding pattern to unit area in the first peripheral area and light-shielding traces to unit area in the second peripheral area, ensuring these ratios are substantially equal. This parameter matching compensates for the varying light emission characteristics across different peripheral areas, achieving uniform brightness despite the expanded display area.
2Reliability
If gate driving structure with light-shielding pattern is provided in first peripheral area, then device functionality is improved, but the light transmission and brightness uniformity deteriorates due to asymmetric light-shielding distribution
Solution Approach 1:
The patent addresses this contradiction by creating complementary local qualities in different peripheral areas. The first peripheral area contains a gate driving structure with light-shielding pattern, while the second peripheral area contains light-shielding traces. By controlling the area ratios of these light-shielding structures to be substantially equal, the patent compensates for the asymmetric light-shielding effect of the gate driving structure through the symmetric light-shielding traces in the opposite peripheral area, thereby maintaining brightness uniformity while preserving device functionality.
Solution Approach 2:
The patent applies the anti-weight principle by using light-shielding traces in the second peripheral area to counterbalance the light-shielding effect of the gate driving structure in the first peripheral area. Although the gate driving structure is necessary for device functionality, its asymmetric light-shielding effect is compensated by the strategically designed light-shielding traces in the opposite peripheral area, with both structures having substantially equal area ratios. This counterbalancing approach maintains brightness uniformity across the display while preserving the essential gate driving functionality.
3Stability of the object's composition
If light-shielding structures are added to control brightness, then brightness uniformity is improved, but the device complexity increases due to additional components and area ratio control
Solution Approach 1:
The patent applies merging by integrating light-shielding traces into the existing peripheral area structure of the display device. Rather than adding separate, complex light-shielding components, the light-shielding traces are formed as conductive or insulating traces within the peripheral area, combining the light-shielding function with the existing structural framework. This approach achieves brightness uniformity while minimizing additional structural complexity.
Solution Approach 2:
The light-shielding traces serve multiple functions: they provide light-shielding to balance the brightness uniformity, and they can also serve as conductive or insulating traces for electrical connections or signal routing in the peripheral area. This multi-functionality reduces the need for separate dedicated light-shielding components, thereby controlling device complexity while achieving the brightness uniformity improvement.
Data Source
AI summary
A display panel includes a first substrate, a second substrate, light-emitting elements, a gate driving structure and light-shielding traces. The second substrate is disposed opposite to the first substrate. An active area, a first peripheral area and a second peripheral area of the first substrate overlap an active area, a first peripheral area and a second peripheral area of the second substrate respectively. The light-emitting elements are disposed on the first peripheral area and the second peripheral area of the first substrate, or the light-emitting elements are disposed on the first peripheral area and the second peripheral area of the second substrate. The gate driving structure is disposed on the first peripheral area of the second substrate. The gate driving structure includes a device layer and a light-shielding pattern overlapped with the device layer. The light-shielding traces are disposed on the second peripheral area of the second substrate.