Organic Planarization Layer for Display Rear Line Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in preventing defects on rear lines and ensuring structural stability, particularly due to uneven surfaces on the base layer, which can lead to short circuits and other issues.
Innovation Solution
A display device structure incorporating a planarization layer made of organic material on the base layer's surface, with a rear line and rear pad electrode formed on the first insulating layer, using transparent inorganic insulating material and transparent conductive oxide, to stabilize the rear line and prevent defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a planarization layer is added to stabilize the rear line, then structural stability is improved, but device complexity increases
Solution Approach 1:
The planarization layer is formed in advance on the base layer before the rear line is deposited. This preliminary action creates a flat surface that prevents defects during subsequent processing, resolving the contradiction by preparing the structure beforehand to ensure stability without complicating the overall device design.
2Reliability
If transparent inorganic insulating material is used for the first insulating layer, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the transparent inorganic insulating material should have a specific refractive index range (1.4-1.7) to optimize both reliability and manufacturing feasibility. By controlling this physical parameter, the patent achieves high reliability while maintaining reasonable manufacturing precision requirements.
3Reliability
If the rear pad electrode is formed to overlap the rear line, then electrical connection is improved, but risk of short circuit increases
Solution Approach 1:
The first insulating layer serves as an intermediary between the rear line and the rear pad electrode. This intermediate layer provides electrical insulation while allowing the rear pad electrode to overlap the rear line for good electrical connection, thus resolving the contradiction by introducing a mediating element that prevents short circuits.
4Ease of manufacture
If organic material is used for the planarization layer, then ease of manufacture is improved, but thermal stability may be reduced
Solution Approach 1:
The patent uses a composite structure where the planarization layer (organic material) is combined with the first insulating layer (transparent inorganic insulating material). This composite approach leverages the ease of manufacture of organic materials for the planarization function while the inorganic layer provides thermal stability, resolving the contradiction through material composition.
Data Source
AI summary
A display device in accordance with an embodiment may include: a base layer including a first surface and a second surface that is opposite to the first surface; a first insulating layer disposed on the second surface; a planarization layer disposed between the second surface and the first insulating layer; a rear line disposed on the first insulating layer; and a rear pad electrode disposed on the rear line. The planarization layer may include organic material.