OLED Display Light Block Layer Reflective Signal Lines
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Solution Overview
Problem
Conventional OLED display screens suffer from reduced luminous efficiency due to the absorption of optical energy by polarizers used to eliminate reflective light from metallic signal lines, which also affects the display effect.
Innovation Solution
The implementation of a light block layer between the metallic signal lines and the substrates in an OLED display screen, which prevents the incidence and emission of natural and reflective light, respectively, thereby eliminating the need for a polarizer and enhancing luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a linear polarizer is used to eliminate reflective light from metallic signal lines, then the display effect is improved, but the luminous efficiency is significantly reduced due to absorption of optical energy
Solution Approach 1:
The patent divides the light management function into two separate components: a light blocking layer that selectively blocks reflective light from metallic signal lines, and a polarizer that is optionally removed or minimized. This segmentation allows the light blocking layer to handle the harmful reflection without requiring the polarizer to absorb all optical energy, thus resolving the contradiction between eliminating reflective light and maintaining luminous efficiency
Solution Approach 2:
The patent introduces a light blocking layer as an intermediary component between the metallic signal lines and the polarizer (or viewing environment). This light blocking layer acts as a mediator that selectively blocks harmful reflective light from metallic signal lines while allowing the OLED light-emitting layer's light to pass through, thereby eliminating the need for the polarizer to absorb all optical energy and improving luminous efficiency
2Loss of energy
If a light block layer is added to block reflective light from metallic signal lines, then the luminous efficiency is improved by removing the polarizer, but the device structure becomes more complex
Solution Approach 1:
The patent merges the light blocking function with existing structural elements of the OLED display. The light blocking layer is integrated into the substrate structure or positioned in conjunction with the encapsulation layers, combining multiple functions (light blocking, structural support, encapsulation) into a unified design. This merging approach adds the necessary light blocking capability while minimizing the increase in overall device complexity
Solution Approach 2:
The light blocking layer is designed to serve multiple functions: blocking reflective light from metallic signal lines, providing structural support, and potentially serving as part of the encapsulation system. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while achieving the goal of improved luminous efficiency
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 solution significantly improves the luminous efficiency of OLED display screens by blocking reflective light from metallic signal lines without the absorption of optical energy, simplifying the structure and reducing costs, while maintaining effective light management.
Implementation Method 1
The light block layer is applied to prevent incidence of natural light and/or emission of reflective light generated by the metallic signal line
Implementation Method 2
OLED light-emitting layer
Data Source
AI summary
An OLED display screen belonging to an OLED display screen technical field includes a first substrate, a second substrate, an OLED light-emitting layer and a metallic signal line. The first substrate and the second substrate are disposed opposite. The OLED light-emitting layer and the metallic signal line are both disposed between the first substrate and the second substrate. A light block layer is disposed between the first substrate and the second substrate. All or a section of the light block layer is disposed between the metallic signal line and the first substrate. The light block layer is applied to prevent incidence of natural light and/or reflective light generated by the metallic signal line. The disclosure can shelter the metallic signal line by the light block layer to absorb reflective light of the metallic signal line, a polarizer can be omitted. The structure is simple and illuminous efficiency is improved.