OLED Display Panel Scattering Structure for Rainbow Stripe Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED display panels suffer from interference-induced rainbow stripes due to optical path differences between light reflected and transmitted through the package substrate and gas layer, affecting display quality.
Innovation Solution
A scattering structure, such as a polarizer with a rough surface, an anti-glare film, or a scattering film with internal refractive-index distribution, is applied to the package substrate to scatter light and reduce coherence, thereby suppressing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a gas layer is filled between the package substrate and OLED display substrate, then the refractive index difference is reduced, but interference-induced rainbow stripes appear due to optical path differences
Solution Approach 1:
The patent applies a scattering structure that converts the harmful interference effect into a beneficial outcome. By introducing controlled scattering at the package substrate surface, the coherent light that causes interference is transformed into scattered light with reduced coherence, thereby eliminating rainbow stripes while maintaining the gas layer's refractive index advantage
Solution Approach 2:
The patent modifies the surface parameters of the package substrate by adding a scattering structure with specific haze values (10%-90%). This changes the light interaction parameters at the substrate surface, transforming the optical path difference from a source of interference into a controlled scattering effect that reduces coherence and eliminates rainbow stripes
2Object-affected harmful factors
If a scattering structure is added to the package substrate, then rainbow stripes are suppressed by reducing light coherence, but the device complexity increases
Solution Approach 1:
The patent applies the scattering structure only at specific locations on the package substrate - specifically at the surface facing the gas layer where interference occurs. This localized application eliminates rainbow stripes without requiring complex modifications throughout the entire device structure, maintaining simplicity while achieving the desired effect
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 scattering structure effectively ameliorates rainbow stripes on the OLED display panel by reducing light coherence, enhancing display quality without increasing panel thickness.
Implementation Method 1
a scattering structure, disposed on a side, distal from the OLED display substrate, of the package substrate, wherein the scattering structure is a single-layer or multi-layer structure configured to scatter light passing through the scattering structure
Implementation Method 2
the scattering structure is a polarizer with at least one rough surface, wherein the polarizer is disposed on a side, distal from the OLED display substrate, of the package substrate
Implementation Method 3
the scattering film includes an internal refractive-index distribution structure configured to control a transmission direction and/or a scattering direction of light
Implementation Method 4
a transparent insulating layer with an embossing structure configured to change a transmission direction and/or a scattering direction of light
Data Source
AI summary
Provided is an OLED display panel. The OLED display panel includes an OLED display substrate; a package substrate, opposite to the OLED display substrate, wherein a gap is defined between the package substrate and the OLED display substrate, and the gap is filled with a gas having a refractive index less than that of the package substrate; and a scattering structure, disposed on a side, distal from the OLED display substrate, of the package substrate, wherein the scattering structure is a single-layer or multi-layer structure configured to scatter light passing through the scattering structure.