Display Apparatus Groove Bank Light Blocking
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Solution Overview
Problem
Thin film transistors (TFTs) in display apparatuses are vulnerable to light, leading to degradation and reduced luminance, which existing technologies have insufficiently addressed.
Innovation Solution
A display apparatus with a planarization layer featuring a groove and a bank filled with a black material, which prevents light from degrading the TFTs, ensuring normal operation and enhancing the display's beauty, lifetime, and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional planarization layer is used without grooves or black materials, then the manufacturing process is simple, but the TFT degrades due to light exposure causing reduced luminance
Solution Approach 1:
The planarization layer is segmented by introducing grooves that divide the non-emission portion into separate regions. This segmentation allows the black material to be positioned strategically in the grooves, creating light-blocking barriers that protect the TFT without requiring a complete overhaul of the planarization layer structure.
Solution Approach 2:
The black material acts as an intermediary element introduced into the grooves of the planarization layer. This intermediary component specifically addresses the light degradation problem by absorbing stray light, while the planarization layer itself maintains its original protective and planarizing functions.
2Reliability
If light-blocking structures are added to protect TFTs, then TFT degradation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The grooves are formed in the planarization layer before the black material is deposited. This preliminary action of creating the groove structure first allows for controlled and precise placement of the black material, ensuring that it is positioned exactly where needed to block light paths to the TFT without requiring complex alignment processes during black material deposition.
Solution Approach 2:
The black material is applied locally only in the groove regions of the non-emission portion, rather than uniformly across the entire display panel. This local application reduces the total amount of black material needed and simplifies the manufacturing process, as the black material is only deposited in specific areas where light blocking is required.
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 reduces TFT degradation caused by light, maintaining luminance and improving the display's performance and user experience.
Implementation Method 1
a bank disposed in the non-emission portion and provided in a partial region of the first electrode and in the groove
Data Source
AI summary
A display apparatus may comprise a substrate including an emission portion and a non-emission portion adjacent to the emission portion, a planarization layer disposed on the substrate, the planarization layer including a groove disposed in the non-emission portion, a first electrode disposed in the emission portion and the non-emission portion, and a bank disposed in the non-emission portion and provided in a partial region on the first electrode and the groove.