Transparent Cover Film Thickness Gradient for Flexible Display Color Cast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display panels face issues with color cast and display effect when bent, due to light deflection caused by non-parallel surfaces of the transparent cover film layer, leading to differences in viewing angles and image color between flat and bending regions.
Innovation Solution
A display panel design with a flexible substrate and a transparent cover film layer featuring a first portion and a second portion, where the second portion's thickness progressively decreases away from the first portion, ensuring non-parallel surfaces that deflect light towards the intermediate region, reducing color cast and improving display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the transparent cover film layer has a uniform thickness, then the manufacturing process is simple, but light deflection occurs when bent causing color cast and poor display effect
Solution Approach 1:
The transparent cover film layer is designed with different thickness characteristics in different regions: the first portion (flat region) maintains uniform thickness for simple manufacturing, while the second portion (bending region) has progressively decreasing thickness to prevent light deflection and color cast during bending, thus resolving the contradiction between manufacturing simplicity and display quality.
Solution Approach 2:
The transparent cover film layer is divided into two distinct portions: the first portion corresponding to the flat region and the second portion corresponding to the bending region. This segmentation allows each portion to have optimized thickness characteristics - uniform thickness for ease of manufacture in the flat region, and variable thickness for preventing color cast in the bending region.
2Object-affected harmful factors
If the transparent cover film layer has non-parallel surfaces to deflect light, then display effect is improved, but the structure becomes more complex
Solution Approach 1:
The non-parallel surface structure is applied locally only to the second portion (bending region) of the transparent cover film layer, while the first portion (flat region) maintains a simple uniform thickness structure. This localized application achieves light deflection and improved display effect in the bending region without unnecessarily complicating the overall structure.
3Object-affected harmful factors
If the thickness of the second portion progressively decreases, then light deflection is reduced improving display effect, but manufacturing precision requirements increase
Solution Approach 1:
The progressive thickness decrease structure is pre-designed and pre-formed in the second portion of the transparent cover film layer during the manufacturing process. By establishing the proper thickness gradient in advance, the patent prevents light deflection and color cast issues before they occur during device operation, rather than attempting to correct them afterward.
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 design effectively reduces color cast and enhances the display effect by deflecting light towards the intermediate region, maintaining image quality and luminance even when the panel is bent, and facilitates manufacturing with a smoothly varying thickness structure.
Implementation Method 1
a thickness of at least partial region of the second portion progressively decreases in a direction away from the first portion
Data Source
AI summary
A display panel includes: a flexible substrate, and the flexible substrate includes an intermediate region and a preset bending region located at at least one side of a periphery of the intermediate region; a display layer located at a side of the flexible substrate; and a transparent cover film layer located at a side of the display layer away from the flexible substrate, and the transparent cover film layer includes a first portion located at a side of the display layer away from the intermediate region, and a second portion located at a side of the display layer away from the preset bending region. The first portion is connected to the second portion, and the thickness of at least partial region of the second portion progressively decreases in a direction away from the first portion.