Light-Emitting Substrate Wiring Layout for Stable Current Control
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Solution Overview
Problem
The existing light-emitting substrates face challenges in signal line management due to high production costs and complexity, particularly when using hard materials like glass, which require precise via formation and multiple flexible circuit boards, leading to increased costs and reduced stability.
Innovation Solution
The light-emitting substrate incorporates a design with multiple light-emitting areas and control circuits that reduce the number of signal lines by sharing control circuits among groups of light-emitting components, using control chips to manage current amplitude and duration, and employing control circuits to adjust signal transmission, thereby simplifying wiring and reducing the need for flexible circuit boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If organic light-emitting materials are used to achieve flexible and lightweight displays, then adaptability and weight are improved, but material stability and lifespan deteriorate due to oxidation and moisture sensitivity
Solution Approach 1:
The encapsulation structure is divided into multiple functional layers: a first encapsulation layer directly covering the organic light-emitting material, a second encapsulation layer covering the first layer, and a buffer layer positioned between the organic material and the first encapsulation layer. This segmentation allows each layer to perform specific protective functions, collectively providing comprehensive protection against oxidation and moisture while maintaining flexibility.
Solution Approach 2:
A buffer layer is introduced as an intermediary component between the organic light-emitting material and the first encapsulation layer. This buffer layer acts as a mediator that prevents direct contact between the sensitive organic material and the encapsulation layer, thereby reducing oxidation and moisture penetration while maintaining the overall flexibility of the display structure.
2Reliability
If encapsulation layers are added to protect organic light-emitting materials, then material stability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent specifies precise thickness parameters for each encapsulation layer and buffer layer (e.g., first encapsulation layer: 50-200 nm, buffer layer: 10-50 nm). By controlling these dimensional parameters, the multi-layer structure achieves effective protection without excessive complexity, as each layer's thickness is optimized for its specific protective function.
Solution Approach 2:
Different regions of the encapsulation structure have different properties: the first encapsulation layer provides primary protection, the buffer layer provides intermediate protection and stress relief, and the second encapsulation layer provides additional protection. Each layer is positioned and designed with specific local properties to address particular protection needs at different locations within the structure.
3Reliability
If multiple encapsulation layers are used to prevent oxidation and moisture, then material stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific thickness ranges for each layer that balance protection effectiveness with manufacturing feasibility. For example, the first encapsulation layer is specified at 50-200 nm and the buffer layer at 10-50 nm. These parameter specifications ensure adequate protection while remaining within achievable manufacturing tolerances for thin-film deposition processes.
Solution Approach 2:
The encapsulation layers are designed with thicknesses that provide sufficient protection beyond the minimum required, ensuring that even with manufacturing variations, the protection effectiveness is maintained. The buffer layer, in particular, is designed to provide excess protection capacity to compensate for potential defects or variations in the other layers.
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
This design reduces signal line impedance and voltage drop, enhances signal stability, and lowers production costs by minimizing the number of signal lines and flexible circuit boards, while allowing precise control over light-emitting brightness.
Implementation Method 1
a fourth region corresponding to a fourth pixel electrode, and a fifth region corresponding to a fifth pixel electrode, among the first region to the fifth region
Data Source
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AI summary
Disclosed are a light-emitting substrate and a driving method therefor, a light-emitting module, and a display apparatus. The light-emitting substrate is provided with a plurality of light-emitting subareas. The light-emitting substrate comprises a base, a plurality of light-emitting assemblies, a plurality of first power voltage signal lines and a plurality of first control circuits, wherein the plurality of light-emitting assemblies are arranged on the base; the plurality of first power voltage signal lines are arranged on the base and are arranged at intervals; the plurality of first control circuits are arranged on the base; one light-emitting assembly is positioned in one light-emitting subarea; each first control circuit is coupled to a first pole of one light-emitting assembly, and each first power voltage signal line is coupled to at least two first control circuits; and the first control circuits are configured to transmit first power voltage signals from the first power voltage signal lines to the first poles of the light-emitting assemblies coupled to the first control circuits, so as to control the amplitudes of the currents flowing through the light-emitting assemblies.