Display Panel Conductive Layer Layout for Low-Capacitance Under-Screen Imaging
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Solution Overview
Problem
Existing display technologies face challenges in integrating an under-screen camera technology while maintaining high screen-to-body ratio and minimizing parasitic capacitance between different colored light emitting devices.
Innovation Solution
A display panel design with a first and second region, where the second region includes multiple light emitting devices of different colors, connected through conductive layers with specific overlapping and non-overlapping conductive lines to reduce parasitic capacitance and enable efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensors are integrated in the display area to increase screen-to-body ratio, then device functionality is improved, but parasitic capacitance and crosstalk between light emitting devices increase, deteriorating display uniformity
Solution Approach 1:
The conductive lines are divided into multiple transparent conductive layers, with each layer containing specific conductive lines that do not overlap with lines in other layers. This segmentation of the conductive path eliminates parasitic capacitance between adjacent conductive lines while maintaining electrical connectivity to the light emitting devices in the second region.
Solution Approach 2:
The patent transitions from a planar single-layer conductive structure to a multi-layer three-dimensional conductive architecture. By stacking transparent conductive layers at different heights (Z-dimension) and arranging conductive lines in specific patterns across layers, the design achieves both high light transmittance and reduced parasitic capacitance.
2Reliability
If multiple conductive lines are arranged closely to connect pixel drive circuits to light emitting devices, then electrical connectivity is improved, but parasitic capacitance between conductive lines increases, deteriorating signal integrity
Solution Approach 1:
Conductive lines are segmented across multiple transparent conductive layers, with each layer containing a subset of the total conductive lines. This segmentation ensures that conductive lines from different layers do not overlap or come into close proximity, thereby eliminating parasitic capacitance between adjacent lines while maintaining complete electrical connectivity through the layered structure.
Solution Approach 2:
The multi-layer transparent conductive structure acts as an intermediary architecture that separates conductive lines in the Z-dimension. This intermediary layering approach allows conductive lines to be distributed across different spatial planes, reducing electromagnetic interference and parasitic capacitance effects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances the screen-to-body ratio by accommodating an under-screen camera and reduces parasitic capacitance, improving display performance and efficiency.
Implementation Method 1
Multiple transparent conductive layers are located between the circuit structure layer and the light emitting structure layer
Implementation Method 2
Current display technologies face challenges in achieving high light transmittance in regions where sensors are integrated, such as under-screen cameras, due to parasitic capacitance and crosstalk between light emitting devices
Implementation Method 3
At least one second pixel drive circuit of the multiple second pixel drive circuits is electrically connected to at least one second light emitting device of the multiple second light emitting devices through a conductive line of at least one conductive layer
Implementation Method 4
The light emitting structure layer is located on a side of the circuit structure layer away from the base substrate and includes multiple second light emitting devices located in a second region
Data Source
AI summary
A display panel includes a base substrate, a circuit structure layer, a light emitting structure layer, and multiple conductive layers. The conductive layer is located between the circuit structure layer and the light emitting structure layer and includes multiple conductive lines. At least one second pixel drive circuit of the multiple second pixel drive circuits is electrically connected to at least one second light emitting device of the second light emitting devices through a conductive line, and the at least one second pixel drive circuit is configured to drive the at least one second light emitting device to emit light. There is an overlap between orthographic projections of the portions of conductive lines of at least two of the multiple conductive layers extending in the first direction on the base substrate.