Display Notch Load Balancing via Multi-Layer Electrodes
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Solution Overview
Problem
Display devices experience luminance deviation due to load differences in wiring configurations around notch portions, where fewer pixels are connected, leading to uneven illumination.
Innovation Solution
Incorporating a load adjusting portion with specific wiring and electrode configurations, including load adjusting wiring, first and second load adjusting electrodes, and insulating layers, to balance the load on scan lines around the notch portion, connected through connection wiring and load connection wiring, ensuring uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a notch portion is introduced to accommodate cameras and sensors, then device functionality and integration are improved, but luminance deviation occurs due to unequal wiring load distribution
Solution Approach 1:
The patent applies local quality by introducing a load adjusting portion specifically at the notch region where wiring load imbalance occurs. This local modification includes adding load adjusting wiring and electrodes (first and second load adjusting electrodes) only in the affected area, allowing the notch region to have different electrical characteristics from the rest of the display panel. This enables the system to maintain overall functionality while locally compensating for the luminance deviation caused by the notch structure.
Solution Approach 2:
The patent changes electrical parameters by adding capacitive elements (load adjusting electrodes) to modify the wiring load characteristics. The first and second load adjusting electrodes are positioned to overlap with the load adjusting wiring, creating capacitance that compensates for the reduced pixel connection count in the notch region. This parameter change balances the electrical load across different regions, ensuring uniform luminance output while preserving the notch's functional benefits.
2Adaptability or versatility
If pixels are excluded from the notch portion to accommodate components, then component integration is improved, but the number of connected pixels decreases leading to load imbalance
Solution Approach 1:
The patent introduces an intermediary element (load adjusting portion) that mediates between the reduced pixel count in the notch region and the required electrical load balance. The load adjusting wiring and electrodes act as intermediate components that compensate for the missing pixel connections, allowing the system to maintain proper electrical characteristics without requiring additional pixels in the notch area. This intermediary structure enables both component integration and load balance to coexist.
3Ease of manufacture
If wiring configuration is simplified around the notch, then manufacturing complexity is reduced, but load balance and luminance uniformity deteriorate
Solution Approach 1:
The patent segments the wiring structure by separating the load adjusting function from the regular pixel connection wiring. The load adjusting wiring and electrodes are introduced as distinct elements specifically for compensation purposes, while the main pixel wiring remains relatively simple. This segmentation allows the system to maintain ease of manufacture for the bulk of the wiring while adding targeted complexity only where needed to achieve luminance uniformity.
Data Source
AI summary
In a display device including a notch portion of a non-emission region, the display device includes: a plurality of pixels; a plurality of scan lines connected to the plurality of pixels; and a load adjusting portion connected to the scan lines on both sides of the notch portion and adjacent to an upper end portion of the notch portion, wherein the load adjusting portion includes: a load adjusting wiring connected to the scan lines on both sides of the notch portion; a first load adjusting electrode in a different layer from the load adjusting wiring and overlapping the load adjusting wiring; and a second load adjusting electrode in a different layer from the load adjusting wiring and the first load adjusting electrode and overlapping the load adjusting wiring.