Moth-eye anti-reflection layer for flexible OLED panels
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Solution Overview
Problem
Conventional display panels reduce light-emitting efficiency by 58% due to polarizers, which also make them prone to breakage during bending, hindering flexible display technology development.
Innovation Solution
An organic light-emitting display panel with a thin-film transistor layer, light-emitting function layer, and thin-film encapsulation layer, featuring a shading layer, color film layers, and an anti-reflection layer with a moth-eye structure of nano-scale protrusions, applied through plasma surface treatment to reduce reflectivity and enhance light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is disposed in the display panel to reduce reflectivity, then the reflectivity is reduced, but the light-emitting efficiency is reduced by about 58%
Solution Approach 1:
The patent removes the polarizer from the display panel structure entirely and replaces it with a moth-eye anti-reflection layer that achieves reflectivity reduction without the harmful light-blocking effects of polarizers, thereby eliminating the 58% light-emitting efficiency loss
Solution Approach 2:
The patent changes the surface morphology parameter of the anti-reflection layer by creating nano-scale protrusions with specific height (100-300 nm) and spacing (50-300 nm) parameters, which optimizes the anti-reflection performance while maintaining high light transmission
2Object-affected harmful factors
If a polarizer with polyvinyl alcohol (PVA) material and greater thickness is used to reduce reflectivity, then the reflectivity is reduced, but the panel is prone to break in bending process
Solution Approach 1:
The patent extracts and removes the thick PVA polarizer layer from the display structure, replacing it with a thin anti-reflection layer that does not compromise the mechanical strength or flexibility of the panel during bending
Solution Approach 2:
The patent employs a thin-film anti-reflection layer with moth-eye structure that maintains the flexibility and bendability of the display panel, enabling flexible display technology development without the brittleness of thick polarizer materials
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 reflectivity and improves light-emitting efficiency while maintaining panel durability, supporting flexible display technology.
Implementation Method 1
applying a plasma surface treatment to the light-filter assembly to form an anti-reflection layer
Implementation Method 2
the anti-reflection layer has an uneven surface and is of a moth-eye structure including a plurality of nano-scale protrusions
Data Source
AI summary
An organic light-emitting display panel includes a thin-film transistor layer, a light-emitting function layer, and a thin-film encapsulation layer which overlap sequentially, and a shading layer, a color film layer, and an anti-reflection layer. The shading layer is disposed on the thin-film encapsulation layer. The color film layer is disposed on the thin-film encapsulation layer. The color film layer includes a first color film layer, a second color film layer, and a third color film layer disposed at an interval from each other. The shading layer is disposed at intervals among the first color film layer, the second color film layer, and the third color film layer. The anti-reflection layer is disposed on at least one surface of the shading layer and the color film layer.