Display Panel Reflection Reduction Layer for Slim OLED Visibility
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Solution Overview
Problem
Display panels using organic light emitting diodes with a white subpixel face issues of high external light reflectance, leading to reduced visibility and increased thickness and manufacturing costs due to the need for a polarizing plate, which is thick and inflexible.
Innovation Solution
A display panel design featuring a substrate with color subpixel regions and a white subpixel region, where a color filter layer is applied to the subpixel regions and a thinner reflection reduction layer is used in the white subpixel region, comprising a selected color filter from the color filter layer, to reduce external light reflectance and improve visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing plate is added to reduce external light reflectance, then visibility is improved, but thickness and manufacturing cost increase
Solution Approach 1:
The invention extracts and removes the polarizing plate from the display panel structure, replacing it with a reflection reduction layer formed by selective removal of the color filter layer. This eliminates the need for the thick polarizing plate while maintaining the function of reducing external light reflectance.
Solution Approach 2:
The invention applies local quality by selectively removing the color filter layer only in the white subpixel region where external light reflectance is problematic, while preserving the color filter layer in color subpixel regions. This localized approach reduces reflectance where needed without adding thickness across the entire panel.
2Object-affected harmful factors
If a polarizing plate is added to reduce external light reflectance, then visibility is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and removes the polarizing plate from the display panel structure, replacing it with a reflection reduction layer formed by selective removal of the color filter layer. This eliminates the need for the thick polarizing plate while maintaining the function of reducing external light reflectance.
Solution Approach 2:
The color filter layer serves multiple functions: it provides color filtering in color subpixels and, when selectively removed in white subpixels, provides reflectance reduction. This multi-functionality eliminates the need for a separate polarizing plate component.
3Object-affected harmful factors
If a polarizing plate is added to reduce external light reflectance, then visibility is improved, but flexibility is reduced
Solution Approach 1:
The invention extracts and removes the polarizing plate from the display panel structure, replacing it with a reflection reduction layer formed by selective removal of the color filter layer. This eliminates the need for the thick polarizing plate while maintaining the function of reducing external light reflectance.
Solution Approach 2:
The invention uses the thin color filter layer structure (when selectively removed) instead of the thick rigid polarizing plate, enabling the display panel to achieve flexibility while maintaining the reflectance reduction function.
4Use of energy by moving object
If the color filter layer is not formed in the white sub pixel, then power consumption is reduced, but external light reflectance increases
Solution Approach 1:
The invention applies local quality by selectively removing the color filter layer only in the white subpixel region where external light reflectance is problematic, while preserving the color filter layer in color subpixel regions. This localized approach reduces reflectance where needed without adding thickness across the entire panel.
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 external light reflectance in the white subpixel region, enhancing visibility while maintaining a slim profile and reducing manufacturing costs by eliminating the need for a polarizing plate, thus facilitating the production of flexible and slim display panels.
Implementation Method 1
a reflection reduction layer provided in the white sub pixel region, wherein the reflection reduction layer includes at least one color filter selected from the color filter layer
Data Source
AI summary
A display panel includes a substrate with a plurality of color sub pixel regions and a white sub pixel region constituting a unit pixel; a color filter layer with a color filter provided in each of the plurality of color sub pixel regions; and a reflection reduction layer provided in the white sub pixel region. The reflection reduction layer includes at least one color filter selected from the color filter layer, and a thickness of the reflection reduction layer is smaller than a thickness of the selected color filter.