Three-Layer Display Substrate Reducing Light Blocking
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Solution Overview
Problem
Conventional OLED display technologies require multiple layers for light emission, leading to reduced luminous efficiency due to increased light blocking and complexity in the light emitting structure.
Innovation Solution
A display substrate with a three-layer structure comprising a gate layer, a light emitting layer, and a source/drain layer, where the light emitting layer includes electron and hole excitation layers, and the source/drain layer is formed with a reflective metal to enhance luminous efficiency by reducing the number of layers and optimizing light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers (gate layer, pixel defining layer, light emitting layer) are used in conventional OLED display technology, then the light emitting structure can achieve luminous effect, but the number of layers increases leading to increased light blocking and reduced luminous efficiency
Solution Approach 1:
The patent merges the gate layer and light emitting layer into a single integrated structure where the gate layer serves dual functions as both the control electrode and the light emitting element. This eliminates the need for separate pixel defining layers and reduces the total number of layers, thereby decreasing light blocking and improving luminous efficiency while maintaining the luminous effect
Solution Approach 2:
The gate layer is designed to perform multiple functions simultaneously: it acts as the control electrode for switching the display pixel and as the light emitting layer for producing light. This multi-functional design reduces the number of required layers and minimizes light blocking, resolving the contradiction between achieving luminous effect and maintaining high luminous efficiency
2Reliability
If multiple layers are used in conventional OLED display technology, then the light emitting structure can achieve luminous effect, but the structural complexity increases
Solution Approach 1:
The patent combines the gate layer and light emitting layer into one integrated structure, eliminating the need for separate pixel defining layers. This merging reduces the number of layers from multiple distinct layers to a simplified three-layer structure (substrate, gate layer, source/drain layer), thereby reducing structural complexity while maintaining the luminous effect
Solution Approach 2:
The gate layer is designed to serve dual purposes as both the control electrode and the light emitting layer. This multi-functional approach eliminates the need for separate dedicated light emitting layers and pixel defining layers, significantly simplifying the overall light emitting structure while preserving the required luminous effect
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 three-layer structure simplifies the light emitting process, reduces light blocking, and increases luminous efficiency by up to 30% compared to traditional OLED technologies.
Implementation Method 1
a material of the source/drain layer includes a reflective metal
Implementation Method 2
the light emitting layer includes an electron excitation layer, a light excitation layer and a hole excitation layer
Data Source
AI summary
A display substrate, a manufacturing method and a driving method thereof, and a display device are provided. The display substrate includes a substrate, a gate layer disposed on the substrate, a gate insulating layer disposed on the gate layer, a pixel defining layer disposed on the gate insulating layer, the pixel defining layer includes a plurality of defining regions, a light emitting layer in the defining regions of the pixel defining layer disposed on the gate insulating layer, wherein the light emitting layer includes an electron excitation layer, a light excitation layer and a hole excitation layer, and a source/drain layer disposed on the light emitting layer. According to an embodiment of the present disclosure, light emission and control of light emission can be realized merely by a three-layer structure of a gate layer, a light emitting layer and a source/drain layer, and compared with the OLED light emitting structure of the prior art, the layer structure is simpler, the light emitted is less blocked, and luminous efficiency is higher.