Display Panel Line Layout for Higher Sensing Sensitivity
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Solution Overview
Problem
Existing display devices face challenges in improving sensing sensitivity, particularly in detecting user inputs and biometric information, due to limitations in the design of connection lines and voltage lines within the display panel.
Innovation Solution
The display device incorporates a specific arrangement of connection lines and voltage lines, with second connection lines spaced evenly and not overlapping first connection lines, and a voltage line positioned between them, enhancing the sensing capability by optimizing the electrical connections and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If connection lines are arranged closely to reduce area, then area is reduced, but sensing sensitivity deteriorates due to increased interference
Solution Approach 1:
The patent transitions from planar arrangement to three-dimensional stacking, placing first and second connection lines on different layers (tiers) of the substrate. This vertical separation in the thickness direction allows lines to be closely spaced in the plane while maintaining electrical isolation, thus reducing area without compromising sensing sensitivity.
Solution Approach 2:
The patent introduces a voltage line as an intermediary element positioned between the first and second connection lines. This voltage line acts as a shield or barrier that reduces electromagnetic interference between the connection lines, enabling closer spacing while maintaining sensing accuracy.
2Device complexity
If connection lines are placed on the same layer to simplify structure, then device complexity is reduced, but sensing sensitivity deteriorates due to interference
Solution Approach 1:
The patent resolves the complexity issue by using multiple layers (tiers) of the substrate to separate connection lines vertically. While this adds a layer dimension, it actually simplifies the overall design by allowing independent routing of first and second connection lines without complex planar avoidance maneuvers, while simultaneously improving sensing sensitivity through reduced interference.
Solution Approach 2:
The voltage line serves as a mediating element that enables the coexistence of first and second connection lines in close proximity by reducing their mutual interference. This intermediary structure allows the system to achieve both simplified routing and improved sensing performance.
3Measurement precision
If voltage lines are added to reduce interference, then sensing sensitivity is improved, but device complexity increases
Solution Approach 1:
The voltage line performs multiple functions: it provides electrical potential for sensor operation and simultaneously acts as a shield to reduce interference between connection lines. This multi-functionality justifies the addition of the voltage line by delivering dual benefits rather than simply increasing complexity.
Solution Approach 2:
The voltage line is positioned strategically between first and second connection lines to serve as an intermediary that reduces electromagnetic interference. This single intermediary element effectively manages the interaction between multiple signal lines, improving sensing sensitivity without requiring numerous additional shielding structures.
Data Source
AI summary
A display device includes a display panel, and a circuit film disposed under the display panel. The display panel includes a base layer, pixels disposed on the base layer, sensors disposed on the base layer, first connection lines disposed on the base layer and electrically connected to the pixels, second connection lines disposed on the base layer and electrically connected to the sensors, first pads electrically connected to the first connection lines, and second pads electrically connected to the second connection lines. The circuit film is electrically connected to the first pads and the second pads through an opening of the base layer, and each of the plurality of second connection lines has a straight shape extending along a first direction.