OLED Cathode Protective Circuit Prevents Oxidation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current OLED display devices face high production costs and low yield due to inadequate packaging, which allows water and oxygen to corrode the cathode layer, leading to oxidation reactions and device destruction.
Innovation Solution
A protective circuit is introduced that includes a power supply with an electronic output node connected to the cathode layer, providing continuous electron supply to the cathode in a non-working state, matching the electric potential of the working state, thereby preventing corrosion by water and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If packaging structures use obstruction approach with water/oxygen blocking materials, then water and oxygen entry is impeded, but absolute security and integrity cannot be guaranteed, leading to cathode corrosion
Solution Approach 1:
The patent converts the harmful oxidation reaction into a beneficial protective mechanism by continuously supplying electrons to the cathode layer. This creates a protective electron environment that prevents water and oxygen from corroding the cathode, transforming the potential harm into a protective effect.
Solution Approach 2:
The patent implements preliminary protection by continuously supplying electrons to the cathode layer before any corrosion can occur. The protective circuit is designed to maintain electron supply during non-working states, proactively preventing oxidation reactions before they can damage the cathode.
2Use of energy by moving object
If OLED display devices are in non-working state without electron supply, then power consumption is reduced, but cathode layer is vulnerable to oxidation reactions with water and oxygen
Solution Approach 1:
The patent ensures continuous electron supply to the cathode layer even during non-working states through the protective circuit. This continuous action maintains the cathode's protective electron environment without requiring the OLED to be fully operational, preventing oxidation while minimizing power consumption.
Solution Approach 2:
The protective circuit acts as an intermediary system that provides electron supply independently of the main OLED operating state. It mediates between the power consumption requirements and the need for continuous cathode protection, enabling protection during non-working states with minimal energy input.
3Reliability
If protective circuit continuously supplies electrons to cathode layer, then cathode corrosion is prevented, but additional power supply and circuit components are required
Solution Approach 1:
The protective circuit is designed to serve multiple functions: it provides electron supply during non-working states, maintains cathode protection, and integrates with existing OLED structure. This multi-functionality reduces the need for separate dedicated protection systems, simplifying overall device complexity.
Solution Approach 2:
The patent merges the protective electron supply function with the existing OLED power supply system. The protective circuit utilizes the same power supply infrastructure, combining protection functionality with existing device components rather than requiring completely separate protection systems.
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 solution effectively prevents cathode layer corrosion and enhances the service life and performance of OLED display devices by ensuring a continuous electron supply, even in non-working states, thus addressing the yield and cost issues associated with existing packaging structures.
Implementation Method 1
electrons can be continuously provided by the power supply to the cathode layer in a non-working state of the OLED display device
Implementation Method 2
water and oxygen create oxidation reactions with a cathode layer, and thus the OLED display device is destroyed
Data Source
AI summary
A protective circuit for a cathode layer, a protective method and an OLED display device are provided. The protective circuit includes a power supply, and an electronic output node electrically connected with a negative electrode of the power supply. Electric potential of the electronic output node is the same as the electric potential of the cathode layer in a working state of the OLED display device, the electronic output node is connected to the cathode layer of the OLED display device, and a positive electrode of the power supply is connected to a voltage node with any potential other than an anode of the OLED display device via a wire, so that electrons can be continuously provided by the power supply to the cathode layer in a non-working state of the OLED display device.