Electroluminescence Display Pattern Layer UV-Responsive Dye
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electroluminescence displays face the challenge of external light reflection, which degrades display quality and leads to luminance reduction, often requiring the use of optical elements that increase power consumption to mitigate this issue.
Innovation Solution
An electroluminescence display design that incorporates a substrate with pixels, a light emitting diode, an encapsulation layer, and a pattern layer with non-liquid crystal dye that changes transmittance properties when exposed to ultraviolet light, allowing for reduced external light reflection without the need for polarizing elements, thereby maintaining high luminance with low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing film or sheet is applied to suppress external light reflection, then external light reflection is reduced, but luminance of the display decreases
Solution Approach 1:
The patent applies a pattern layer with dye that changes its light absorption characteristics through UV irradiation. The dye molecules undergo photoisomerization, transforming from a state that absorbs visible light to a state that transmits visible light, thereby dynamically adjusting the optical parameters of the pattern layer to resolve the contradiction between reflection suppression and luminance maintenance
Solution Approach 2:
The pattern layer's transmittance is made dynamic through UV-responsive dye molecules. By irradiating UV light, the dye switches between absorbing and transmitting states, allowing the display to dynamically adapt its optical properties based on external light conditions, thus preventing luminance degradation while suppressing reflection
2Illumination intensity
If higher power is used to prevent luminance degradation, then luminance is maintained, but power consumption increases
Solution Approach 1:
The pattern layer is pre-configured with UV-responsive dye that can switch its optical state in advance. By applying UV irradiation before or during external light exposure, the system proactively adjusts the pattern layer's transmittance to prevent luminance degradation, eliminating the need for compensatory power increases
3Object-affected harmful factors
If a pattern layer with dye is applied to block external light, then external light reflection is suppressed, but visible light transmittance decreases
Solution Approach 1:
The dye in the pattern layer undergoes parameter change through UV-induced photoisomerization. Upon UV irradiation, the dye molecules transition from a configuration that absorbs visible light to one that transmits visible light, thereby changing the optical parameters of the pattern layer from blocking to transmitting state, resolving the contradiction between reflection suppression and light transmittance
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 minimizes external light reflection, ensuring high luminance and reducing power consumption by adjusting the transmittance properties of the pattern layer using ultraviolet light, thus enhancing display quality without degrading luminance.
Implementation Method 1
the pattern layer includes a non-liquid crystal dye which transmits visible light as a length of a conjugated structure is shortened by irradiating an ultraviolet light of a specific wavelength
Data Source
AI summary
An electroluminescence display includes a substrate including a plurality of pixels, each pixel having an emission area and a non-emission area; a light emitting diode disposed in the emission area on the substrate; an encapsulation layer covering the light emitting diode; and a pattern layer including a light transmitting area corresponding to the emission area and a light blocking area corresponding to the non-emission area, and disposed at a first direction from the substrate, wherein the first direction is corresponding to a light emitting direction of light which is generated by the light emitting diode, thereby reducing reflection of external light.