Display Device with Temperature-Dependent Reflection-Layer and Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices and organic light emitting display devices face limitations in reducing bezel size and are prone to color loss, cracking, and high heat-induced defects due to external light reflection.
Innovation Solution
A display device design incorporating a substrate with LEDs, a planarization layer, a bank made of black material, a reflection-reducing layer with temperature-dependent reflectance, and a heat dissipation layer featuring a vertically aligned carbon nanotube layer doped with metal oxide particles to mitigate color loss, cracking, and external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If liquid crystal display panels or organic light emitting display panels are disposed in a tile shape to implement an extra-large screen, then the screen size is increased, but a bezel area between adjacent panels is visible
Solution Approach 1:
The patent extracts and removes the bezel structure by making the bank region transparent or matching the background color, eliminating the visible separation between adjacent display panels while maintaining the modular tile-based construction for large screens
Solution Approach 2:
The patent applies different optical properties to different regions: the pixel regions maintain high light emission intensity while the bank regions between pixels are made transparent or color-matched to the background, creating a seamless appearance at panel boundaries
2Object-generated harmful factors
If a bank with black material is used to prevent light leakage, then light leakage is reduced, but external light reflection increases
Solution Approach 1:
The patent changes the optical parameters of the bank material by making it transparent or matching the background color instead of using opaque black material, thereby reducing external light reflection while maintaining light leakage prevention through structural design
Solution Approach 2:
The patent introduces an intermediary layer or material between the bank and the external environment that reduces reflection through anti-reflective coating or refractive index matching, allowing the bank to maintain its light-blocking function without causing glare
3Illumination intensity
If LEDs are used to provide high luminance and fast lighting speed, then display performance is improved, but heat generation increases causing color loss and cracking
Solution Approach 1:
The patent introduces a heat dissipation layer as an intermediary between the LED and the bank structure, which acts as a thermal conduit to transfer heat away from the LED, preventing color loss and cracking while maintaining high luminance output
Solution Approach 2:
The patent replaces passive thermal management with active heat dissipation mechanisms, using thermally conductive materials and structured heat dissipation paths to actively manage heat flow rather than relying on natural conduction alone
4Object-generated harmful factors
If the bank is made opaque to block light, then light leakage is prevented, but manufacturing complexity increases due to color loss defects
Solution Approach 1:
The patent extracts the light-blocking function from the bulk material property and relocates it to the structural design and transparent/matched-color bank region, eliminating the need for complex opaque material processing and reducing manufacturing steps
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 reduces color loss, prevents cracking, and minimizes external light reflection, enhancing the reliability and performance of the display device by efficiently dissipating heat and managing light reflection.
Implementation Method 1
a heat dissipation layer disposed on the reflection-reducing layer
Implementation Method 2
a reflection-reducing layer disposed on the bank and having a reflectance that varies according to temperature thereof
Implementation Method 3
a bank disposed on the planarization layer and including a black material
Data Source
AI summary
A display device according to an example embodiment of the present disclosure includes a first substrate including an active area including a plurality of pixels and a non-active area surrounding the active area; a plurality of LEDs disposed in the plurality of pixels on the first substrate; a planarization layer disposed to surround the plurality of LEDs; a bank disposed on the planarization layer and including a black material; a reflection-reducing layer disposed on the bank and having a reflectance varying according to temperature; and a heat dissipation layer disposed on the reflection-reducing layer.