UV Absorbing Light Filter for Outdoor Display Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices, especially those used outdoors, face deterioration of light emitting elements due to damage from external ultraviolet light, leading to decreased luminance and light emitting area, which affects the overall performance and color accuracy.
Innovation Solution
Incorporating a light absorber represented by Formula X—Ar—Y, where Ar is pyrene, chrysene, or anthracene, and Y is a specific group, into the color filter layer or touch insulating layers to absorb ultraviolet light, thereby reducing damage to the light emitting elements and maintaining luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light emitting element is used outdoors, then the display device can be used in various environments, but the light emitting layer is damaged by external ultraviolet light causing deterioration of element characteristics
Solution Approach 1:
The patent introduces a light absorber as an intermediary substance between the ultraviolet light and the light emitting layer. This light absorber specifically absorbs UV light in the 380-410 nm wavelength range, preventing the harmful radiation from reaching and damaging the light emitting layer, thus protecting element characteristics while maintaining outdoor usability
Solution Approach 2:
The patent converts the harmful ultraviolet light into a beneficial protective mechanism by using the light absorber to capture UV energy. The light absorber transforms the potentially damaging UV radiation into harmless energy through absorption, preventing deterioration while allowing the display to function outdoors
2Adaptability or versatility
If the light emitting layer is damaged by ultraviolet light, then outdoor use becomes possible, but luminance decreases and light emitting area decreases
Solution Approach 1:
The light absorber acts as a protective intermediary that selectively absorbs ultraviolet light before it can reach the light emitting layer. This prevents UV-induced damage that would otherwise cause luminance degradation and reduction of light emitting area, maintaining display performance in outdoor conditions
3Adaptability or versatility
If the light emitting layer is damaged by ultraviolet light, then outdoor use continues, but color accuracy deteriorates and abnormal color expression occurs
Solution Approach 1:
The light absorber serves as a protective intermediary that specifically targets and absorbs ultraviolet radiation in the 380-410 nm range. By blocking this harmful radiation before it reaches the light emitting layer and color filter layer, the patent prevents UV-induced color degradation and maintains accurate color reproduction in outdoor environments
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 light absorber effectively prevents or reduces the deterioration of light emitting elements by absorbing UV light, maintaining the display device's luminance and color accuracy, and reducing the risk of abnormal color expression.
Implementation Method 1
the planarization layer includes a light absorber... to absorb ultraviolet light, thereby reducing damage to the light emitting elements and maintaining luminance
Data Source
AI summary
A display device includes: a base substrate; a light emitting element on the base substrate; a thin film encapsulation layer on the light emitting element to encapsulate the light emitting element; a touch member on the thin film encapsulation layer; a color filter layer on the touch member; and a planarization layer on the color filter layer to cover the color filter layer, wherein the planarization layer includes a light absorber represented by Formula 1:X—Ar—Y. Formula 1