Reflective Display Barrier Structure for Higher Light Emission
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Solution Overview
Problem
Conventional barrier structures in display devices absorb light, leading to reduced light emission efficiency and color purity due to their light-absorbing characteristics, especially when thick phosphor layers are required for high-resolution displays.
Innovation Solution
A barrier structure comprising light-transmissive photoresist patterns with reflective films and non-transmissive photoresist patterns is developed, where the light-transmissive patterns have a thickness of 2 μm to 200 μm and reflective films have a reflectance of 50% or more, minimizing light absorption and allowing for a thicker light conversion structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional barrier structure is used to block light between pixels, then light blocking is achieved, but light absorption occurs reducing light emission efficiency
Solution Approach 1:
The patent converts the harmful light absorption effect into a beneficial light reflection effect. By forming a reflective film on the barrier structure, the structure that previously absorbed light and reduced efficiency now reflects light back into the pixel, converting the harmful absorption into beneficial light recycling that enhances emission efficiency while maintaining pixel separation.
Solution Approach 2:
The patent creates a composite barrier structure combining a base material (photoresist or inorganic layer) with a reflective film layer. This composite structure maintains the light blocking function between pixels while adding the light reflection function that improves light emission efficiency, resolving the contradiction between blocking and efficiency.
2Object-affected harmful factors
If the barrier structure thickness is increased to improve pixel separation, then light blocking improves, but light absorption increases reducing efficiency
Solution Approach 1:
By adding a reflective film to the thickened barrier structure, the patent converts the previously harmful increased light absorption into beneficial light reflection. The thicker barrier provides better pixel separation while the reflective film redirects absorbed light back into the pixel, improving efficiency despite increased thickness.
Solution Approach 2:
The patent addresses the thickness-efficiency contradiction by adding a functional dimension (reflective film coating) rather than simply increasing barrier thickness. This dimensional approach allows the barrier to maintain adequate thickness for pixel separation while the reflective film layer provides the efficiency improvement through light redirection.
3Manufacturing precision
If a thick light conversion structure is formed to improve color purity, then color purity improves, but the barrier structure must be thicker increasing complexity
Solution Approach 1:
The patent uses a composite barrier structure with a base layer and reflective film layer, allowing the barrier to serve dual functions: maintaining pixel separation and reflecting light to enhance color purity. This composite approach achieves high color purity without requiring excessive barrier thickness, managing device complexity.
Solution Approach 2:
The reflective film on the barrier structure provides multi-functionality: it blocks light between pixels, reflects light to enhance emission efficiency, and contributes to color purity by redirecting light through the light conversion structure. This universal approach achieves multiple goals without proportionally increasing complexity.
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
This solution reduces light absorption, enhances light emission efficiency, and improves color purity by forming a thicker light conversion structure, suitable for high-resolution displays with smaller pixel sizes.
Implementation Method 1
reflective films formed on an entire outer surface of the light-transmissive photoresist patterns... the reflective films may have a reflectance of 50% or more with respect to a light wavelength of 430 nm to 650 nm
Data Source
AI summary
A barrier structure of a display device and a method of manufacturing the same are proposed. The barrier structure may include a plurality of light-transmissive photoresist patterns disposed on a substrate at predetermined intervals. The barrier structure may also include reflective films formed on an entire outer surface of the light-transmissive photoresist patterns.