Display Substrate Transparent Wiring Layout for Uniform Capacitance
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniform light transmittance and display quality due to differences in manufacture procedures and properties between transparent conductive layers, leading to uneven capacitance loading and regional display issues like mura.
Innovation Solution
The display substrate design includes a base substrate with distinct light transmittance areas, a light-emitting device layer, a driving circuit layer, and multiple transparent conductive layers. Transparent wires are routed such that corresponding wires for light-emitting devices in the same row or column are distributed across at least two layers, ensuring even electrical connections and reducing capacitance disparities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transparent wires are arranged in a single layer for electrical connection, then the device complexity is reduced, but capacitance loading becomes uneven and display uniformity deteriorates
Solution Approach 1:
The transparent conductive layer is segmented into multiple layers (first transparent conductive layer and second transparent conductive layer), with each layer containing specific transparent wires. This segmentation distributes the electrical connection function across multiple layers, achieving more uniform capacitance loading while maintaining overall structural organization and managing complexity through functional division.
Solution Approach 2:
The patent transitions from a single-layer transparent conductive structure to a multi-layer structure, adding the vertical dimension (layer stacking) to the wire arrangement. This dimensional change allows transparent wires to be distributed across different heights (Z-axis), enabling more uniform electrical connection and capacitance distribution while improving display uniformity without significantly increasing overall device complexity.
2Ease of manufacture
If transparent wires are concentrated in fewer layers, then the manufacturing process is simplified, but regional display issues like mura occur due to uneven capacitance
Solution Approach 1:
The transparent conductive layer is divided into multiple segments (first and second transparent conductive layers), each containing specific transparent wires that connect to different pixel circuits. This segmentation distributes the electrical connection function across multiple layers, achieving more uniform capacitance loading while maintaining overall structural organization and managing complexity through functional division.
Solution Approach 2:
Different transparent conductive layers are designed with different wire arrangements and connection patterns tailored to specific regional requirements. The first transparent conductive layer may serve certain pixel circuits while the second layer serves others, allowing localized optimization of electrical connection and capacitance distribution to prevent regional display defects like mura.
3Manufacturing precision
If multiple transparent conductive layers are used to distribute wires evenly, then display uniformity is improved, but the device complexity increases
Solution Approach 1:
The transparent conductive layer is segmented into independent first and second layers, each with specific wire configurations. This segmentation distributes the electrical connection function across multiple layers, achieving more uniform capacitance loading while maintaining overall structural organization and managing complexity through functional division.
Solution Approach 2:
Each transparent conductive layer serves multiple functions: providing electrical connection, distributing capacitance load, and contributing to overall display uniformity. The first and second transparent conductive layers work together in a coordinated manner, with each layer performing similar but complementary functions, thereby achieving uniformity without proportionally increasing complexity.
Data Source
AI summary
Disclosed are a display substrate, a display panel, and a display device. The display substrate includes a base substrate having a first display area and a second display area; a light-emitting device layer arranged on the base substrate and including a plurality of first light-emitting devices arranged in the first display area; a driving circuit layer arranged between the light-emitting device layer and the base substrate and including a plurality of first pixel circuits; and a plurality of transparent conductive layers arranged on the base substrate.