OLED Display Substrate Double Sandwich Film Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current polarizers used in OLED display panels are thick, brittle, and inefficient, leading to increased light loss and limitations in flexible display characteristics such as folding and curling, while also causing luminance decay issues due to excessive encapsulation layer thickness.
Innovation Solution
A display substrate design featuring a base substrate with sequentially layered display structure, first and second encapsulation layers, protection layers, and a color filter layer, employing a double sandwich film layer structure to reduce thickness and improve luminance decay angle, and water and oxygen resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but light loss increases and the structure becomes thick and brittle
Solution Approach 1:
The patent extracts and removes the polarizer component from the OLED display structure, replacing it with a color filter layer that achieves similar optical control without the light loss and mechanical brittleness issues of polarizers
Solution Approach 2:
The patent changes the optical control mechanism from polarizer-based polarization filtering to color filter-based wavelength selection, fundamentally altering how light management is achieved in the display structure
2Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but the structure becomes thick and brittle, limiting flexible display characteristics
Solution Approach 1:
The patent removes the polarizer component that causes thickness and brittleness, replacing it with a color filter layer that enables flexible display characteristics while maintaining optical performance
Solution Approach 2:
The patent employs thin film structures for the color filter layer and encapsulation layers that provide the necessary flexibility for folding and curling display applications, replacing the thick and brittle polarizer
3Reliability
If encapsulation layer thickness is increased to improve water and oxygen resistance, then protection is improved, but luminance decay angle deteriorates
Solution Approach 1:
The patent divides the encapsulation structure into multiple thin encapsulation layers interspersed with protection layers, achieving effective barrier protection against water and oxygen while maintaining thin overall thickness that preserves luminance decay angle
Solution Approach 2:
The patent transitions from a single thick encapsulation layer to a multi-layer structure with alternating organic and inorganic layers, utilizing the vertical dimension to achieve both protection and optical performance
Data Source
AI summary
A display substrate includes a base substrate, a display structure layer arranged on the base substrate, a first encapsulation layer, a first protection layer, a color filter layer, a second protection layer and a second encapsulation layer sequentially superposed on the display structure layer. Also provided is a preparation method of a display substrate and a display apparatus.