Display Panel Color Filter Interference for Low Reflectivity
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Solution Overview
Problem
Current display panels using non-polarizer technology face high reflectivity issues, which reduce display contrast and are not suitable for dynamic bending products due to increased reflectance.
Innovation Solution
A display panel design incorporating a light emitting layer, encapsulation layer, color filter layer with specific refractive index and thickness relationships for color resistors, and a light transmitting layer, where the thickness of the color resistors and their refractive indices satisfy the equation d=(2K+1)λn, promoting destructive interference of reflected light to reduce reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If color filter is used to replace polarizer (non-polarizer technology), then the thickness of the polarizing function layer is reduced from close to 100 microns to less than 5 microns and light extraction rate is increased from 42% to 60%, but the overall reflectivity of the display panel increases to more than 6%, reducing display contrast
Solution Approach 1:
The patent applies parameter changes by precisely controlling the thickness of the color filter layer and the refractive index of the color resistors to satisfy specific mathematical relationships. By adjusting these parameters, the reflected light from the color filter layer undergoes destructive interference, reducing the overall reflectivity from more than 6% to below 5%, thereby resolving the high reflectivity issue while maintaining the thin profile achieved by non-polarizer technology
Solution Approach 2:
The patent converts the harmful reflected light into a beneficial effect by utilizing the interference phenomenon. Instead of treating reflection as purely unwanted, the design uses the reflected light paths to create destructive interference through carefully controlled thickness and refractive index parameters, transforming the harmful reflection into a mechanism that actively reduces overall reflectivity and improves display contrast
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 the reflectivity of the display panel to about 5%, improving display contrast and making it more suitable for dynamic bending products.
Implementation Method 1
the thickness d of the color resistors and the refractive index n of the color resistors satisfy following relationship: d=(2K+1)λn wherein K is a constant, and λ is a wavelength of light corresponding to a color of the color resistor
Data Source
AI summary
A display panel and a manufacturing method of the display panel are provided. The display panel has a light emitting layer, an encapsulation layer provided on the light emitting layer, a color filter layer provided on the encapsulation layer and a light transmitting layer provided on the color filter layer, and the color filter layer has color resistors and a light shielding member located among the color resistors, and a thickness d of the color resistors and a refractive index n thereof satisfy a specific relationship.