Display Contact Hole Barrier Layer Against Moisture and Gas Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with light emitting diodes (LEDs) face damage to contact holes due to moisture and gas, which can harm wires and electrodes, leading to potential electrical failures.
Innovation Solution
A display device design incorporating a substrate with a pixel driving circuit, a bank, a light emitting element, an optical layer, and a barrier layer to protect the contact hole area from moisture and gas, using a first barrier layer on the inclined surface of the contact hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective layers and insulating layers are formed to protect the pixel driving circuit and light emitting element, then protection coverage is improved, but the area where contact holes are formed becomes vulnerable to moisture and gas damage
Solution Approach 1:
The patent applies a barrier layer specifically at the inclined surface of the contact hole where moisture and gas damage occurs, rather than uniformly protecting all areas. This localized approach addresses the specific vulnerability of the contact hole region while maintaining the overall protective structure.
Solution Approach 2:
The barrier layer acts as an intermediary protective element between the harmful moisture and gas environment and the contact hole area. This intermediate layer prevents direct contact between the harmful factors and the vulnerable contact hole region, thereby protecting the wires and electrodes from damage.
2Reliability
If contact holes are formed to electrically connect wires and electrodes, then electrical connectivity is improved, but the contact hole area becomes damaged by moisture and gas
Solution Approach 1:
The barrier layer serves as a protective intermediary that allows the contact hole to maintain its electrical connectivity function while shielding it from moisture and gas damage. This intermediary layer prevents harmful factors from reaching the contact hole without interfering with its electrical function.
Solution Approach 2:
The barrier layer is applied in advance to the inclined surface of the contact hole to prevent moisture and gas from causing damage before they can penetrate and harm the electrical connections. This preliminary protective action ensures the longevity and reliability of the electrical connectivity.
3Reliability
If wires and electrodes are disposed between protective layers, then electrical connections are established, but they become damaged when the contact hole area is damaged
Solution Approach 1:
The barrier layer acts as a protective intermediary that shields the wires and electrodes from moisture and gas damage. By preventing harmful factors from reaching the contact hole area, the barrier layer indirectly protects the wires and electrodes from damage, thereby maintaining their strength and electrical connection reliability.
Data Source
AI summary
A display device is provided, the display device including: a substrate including a display area and a non-display area; a pixel driving circuit disposed in the display area on the substrate; a bank disposed on the pixel driving circuit; a light emitting element disposed on the bank; an optical layer covering side surfaces of the bank and the light emitting element; a black matrix disposed on the optical layer; and a first barrier layer disposed on an inclined surface of a first contact hole in the optical layer.