OLED Light-Emitting Member Lateral Electrode Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED display devices suffer from reduced luminous efficiency due to light emitted in various directions needing to pass through multiple layers, resulting in significant energy loss through refraction.
Innovation Solution
A light-emitting member structure comprising a first electrode layer, a second electrode layer with opposite polarity, a light-emitting layer, and an isolation layer, where the light-emitting layer is on the first electrode layer, and the second electrode layer is on the side of the light-emitting layer, with the isolation layer between them, reducing the need for light to refract through the second electrode layer upon emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the second electrode layer is placed on top of the light-emitting layer in a conventional OLED structure, then the device structure is simplified, but light emitted in various directions must pass through multiple layers causing significant energy loss through refraction
Solution Approach 1:
The patent applies dimensionality change by moving the second electrode layer from a vertical stacking arrangement (conventional top-bottom structure) to a lateral arrangement where the second electrode layer is positioned at the side of the light-emitting layer. This spatial reconfiguration in another dimension allows light to escape laterally without passing through multiple refractive layers, thereby reducing energy loss through refraction while maintaining structural integrity.
Solution Approach 2:
The isolation layer serves as an intermediary element positioned between the first electrode layer and the second electrode layer. This intermediary structure enables the second electrode layer to be laterally positioned without directly contacting the first electrode layer, facilitating the dimensional change while providing electrical isolation and structural support. The intermediary allows the innovative lateral configuration to function properly.
2Productivity
If multiple layers are stacked vertically in conventional OLED, then the device structure is compact, but light emission efficiency is reduced due to multiple refraction interfaces
Solution Approach 1:
The patent transitions from a vertical stacking configuration to a lateral arrangement by positioning the second electrode layer at the side of the light-emitting layer rather than on top. This dimensional change reduces the number of vertical refraction interfaces that light must traverse, thereby improving light emission efficiency while maintaining a compact device structure through optimized spatial arrangement.
3Area of stationary object
If the light-emitting layer is positioned to maximize aperture ratio, then more light can be emitted, but the viewing angle and light distribution are compromised
Solution Approach 1:
By positioning the second electrode layer laterally at the side of the light-emitting layer, the patent enables light to escape in multiple directions including lateral and upward directions without being blocked by the second electrode layer. This dimensional reconfiguration allows the light-emitting layer to maintain a larger aperture ratio while simultaneously improving viewing angle and light distribution characteristics.
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 configuration minimizes light refraction, thereby enhancing the luminous efficiency of the OLED display devices by reducing energy loss and improving the viewing angle and aperture ratio.
Implementation Method 1
a light-emitting layer (3), wherein the light-emitting layer (3) is located on the first electrode layer (1)
Implementation Method 2
light emitted in various directions needing to pass through multiple layers, resulting in significant energy loss through refraction
Data Source
AI summary
Disclosed are a light-emitting member and a method for preparing the same as well as a display device. The light-emitting member includes a first electrode layer, a second electrode layer having a polarity opposite to that of the first electrode layer, a light-emitting layer and an isolation layer, the light-emitting layer is located on the first electrode layer, the second electrode layer is located on a side of the light-emitting layer, and the isolation layer is located on a side of the first electrode layer to isolate the first electrode layer from the second electrode layer.