Display Panel UV Absorber Capping Layer
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Solution Overview
Problem
Organic light-emitting display panels face issues with light decomposition under ambient light, leading to reduced contrast and potential harm to human eyes due to high-energy light emission, particularly from ultraviolet wavelengths.
Innovation Solution
Incorporating an ultraviolet light absorber in capping layers of the display panel, which absorbs light between 380 nm to 410 nm with an absorption rate of at least 20%, reducing the impact of ultraviolet light on phosphorescent materials and enhancing the display's performance and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic light-emitting elements are used to achieve light weight, bendability, and high contrast, then display performance is improved, but the organic light-emitting material decomposes under ambient ultraviolet light irradiation
Solution Approach 1:
An ultraviolet light absorber is introduced as an intermediary substance between the ambient ultraviolet light and the organic light-emitting material. This absorber layer captures the harmful ultraviolet radiation before it can reach and decompose the organic light-emitting material, thereby protecting the material stability while maintaining display performance.
Solution Approach 2:
The harmful ultraviolet light is converted into a beneficial protective mechanism by using the ultraviolet light absorber to capture the harmful radiation and convert it into harmless energy forms, transforming the potentially damaging ultraviolet exposure into a protective shielding effect for the organic light-emitting material.
2Reliability
If organic light-emitting elements emit high-energy light to achieve high contrast, then display quality is improved, but harmful ultraviolet light damages human eyes
Solution Approach 1:
The ultraviolet light absorber serves as a protective intermediary between the organic light-emitting element and the human eye. It selectively absorbs the harmful ultraviolet portion of the emitted light while allowing the beneficial visible light to pass through, thereby protecting human eyes from damage while preserving display quality.
Solution Approach 2:
The protective function is applied locally by incorporating the ultraviolet light absorber specifically in the regions where ultraviolet emission occurs, allowing the display to maintain high contrast and quality while providing targeted protection against harmful ultraviolet light reaching the human eye.
3Ease of operation
If ambient light exposure is allowed to achieve natural viewing conditions, then user experience is improved, but contrast of the display panel deteriorates significantly
Solution Approach 1:
The ultraviolet light absorber modifies the spectral composition of the emitted light by removing the harmful ultraviolet portion, effectively changing the color quality of the light to one that is both safe for human eyes and more resistant to contrast deterioration under ambient light conditions, thereby improving user experience while maintaining 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 protects human eyes from high-energy light and improves the display panel's contrast and overall performance by reducing ultraviolet light exposure, ensuring better light purity and longevity under ambient conditions.
Implementation Method 1
the ultraviolet light absorber absorbs light having a wavelength ranging from 380 nm to 410 nm with an absorption rate A (380 nm-410 nm) greater than or equal to 20%
Data Source
AI summary
The present disclosure provides a display panel and a display apparatus. The display panel includes: light-emitting elements which include a first light-emitting element that emits light of a first color having a wavelength ranging from λ1 to λ2, a second light-emitting element that emits light of a second color having a wavelength ranging from λ3 to λ4, and a third light-emitting element that emits light of a third color having a wavelength ranging from λ5 to λ6; and first to third capping layers respectively covering light-exiting sides of the first to third light-emitting elements. At least one of the first to third capping layers contains an ultraviolet light absorber that can absorb light having a wavelength ranging from 380 nm to 410 nm with an absorption rate greater than or equal to 20%.