OLED Pixel Electrode Resonance Structure
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Solution Overview
Problem
Existing OLED display manufacturing methods are complex and do not easily support the production of high-quality OLED displays with efficient optical resonance for full color systems.
Innovation Solution
A wide-area process for manufacturing OLED displays involving a substrate with a semiconductor active layer, alternately stacked pixel metal and transparent conductive layers, and distinct gate and pixel electrodes, along with an organic emission layer and common electrode, optimized for optical resonance with specific materials and thicknesses to facilitate easy and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a resonant structure is adopted to change optical lengths for full color system, then optical efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the pixel electrode and gate electrode into the same layer, and integrates the resonant structure formation into the existing electrode fabrication process. This merging allows the optical resonance function to be achieved without adding separate manufacturing steps, thus improving optical efficiency while avoiding increased manufacturing complexity.
Solution Approach 2:
The pixel electrode serves multiple functions: it acts as both the gate electrode and the resonant structure for optical length control. By making the electrode structure multi-functional, the patent achieves full-color capability through optical resonance without requiring additional dedicated components or process steps.
2Manufacturing precision
If multiple pixel metal layers are stacked to control optical resonance, then optical precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the formation of multiple pixel metal layers with the gate electrode formation process. The same photolithography and deposition steps used for the gate electrode are utilized to create the stacked pixel metal structure, allowing precise control of optical resonance without requiring separate manufacturing sequences.
Solution Approach 2:
The pixel metal layers are prepared and stacked in advance during the electrode fabrication stage, before the organic emission layer is deposited. This preliminary action ensures that the resonant structure is already in place with precise thickness control (20-130 Å per layer), eliminating the need for post-assembly adjustments.
3Device complexity
If pixel electrode and gate electrode are formed in the same layer, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines the pixel electrode and gate electrode into a single layer structure, reducing the total number of fabrication steps. The same photolithography mask and deposition process are used for both electrodes, simplifying the device architecture while maintaining functional distinction through pattern design.
Solution Approach 2:
The patent controls the thickness of the pixel metal layers within a specific range (20-130 Å per layer, sum of 100-200 Å) to achieve the desired optical resonance. By precisely controlling these dimensional parameters during a single fabrication process, the patent simultaneously reduces device complexity and meets high manufacturing precision requirements.
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 method allows for the easy and efficient manufacturing of high-quality OLED displays with improved optical efficiency and optical resonance, simplifying the production process while maintaining excellent quality.
Implementation Method 1
a resonant structure for changing optical lengths of respective wavelengths emitted by an organic emission layer must be adopted
Implementation Method 2
a resonant structure for changing optical lengths of respective wavelengths emitted by an organic emission layer must be adopted
Data Source
AI summary
An organic light emitting diode display comprises: a substrate; an active layer formed with a semiconductor material on the substrate; a first insulation layer formed on the semiconductor layer; a pixel electrode formed on the first insulation layer and generated by alternately stacking a plurality of pixel metal layers and a plurality of pixel transparent conductive layers; a gate electrode formed on the first insulation layer and formed in a configuration different from that of the pixel electrode; a second insulation layer formed on the first insulation layer so as to cover the gate electrode with an insulation layer opening for revealing the pixel electrode; a source electrode and a drain electrode respectively formed on the second insulation layer and electrically connected to the active layer; an organic emission layer formed on the pixel electrode; and a common electrode formed on the organic emission layer.