Micro-LED Display with Phosphor Grooves for Contrast and Power
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Solution Overview
Problem
Conventional display devices such as liquid crystal displays (LCDs) and organic light emitting diodes (OLEDs) face issues with high power consumption, inaccurate color contrast, low response time, high production costs, short lifespan, and uneven brightness, which are not effectively addressed by existing technologies.
Innovation Solution
A display apparatus utilizing micro-light emitting diodes (LEDs) with nitride semiconductors, featuring a light emitting diode part and a TFT panel with phosphor layers for wavelength conversion, allowing for accurate control of contrast and reduced power consumption, suitable for wearable devices, smartphones, and monitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional display devices (LCD or OLED) are used, then display functionality is achieved, but power consumption is high
Solution Approach 1:
The display device is segmented into multiple sub-pixels (red, green, blue) within each pixel unit, allowing independent control and optimization of light emission for each color component. This segmentation enables more efficient power utilization by activating only necessary sub-pixels based on display content requirements
Solution Approach 2:
The patent employs a composite structure combining organic electroluminescent materials with inorganic encapsulation layers. The organic emissive layer provides efficient light generation while inorganic layers provide protective encapsulation, creating a hybrid system that achieves both low power consumption and high reliability
2Measurement precision
If conventional display devices are used, then display functionality is achieved, but color contrast accuracy is poor
Solution Approach 1:
Each sub-pixel is equipped with specific organic emissive materials tailored to emit precise wavelengths for red, green, or blue colors. This local optimization of material properties ensures accurate color reproduction and high color contrast without requiring complex additional filtering structures
Solution Approach 2:
The patent utilizes organic electroluminescent materials that emit specific colors through electroluminescence without requiring color filters. The emissive layers themselves are designed to emit pure red, green, or blue light, achieving accurate color contrast through intrinsic material properties rather than post-emission color manipulation
3Speed
If conventional display devices are used, then display functionality is achieved, but response time is slow
Solution Approach 1:
The organic electroluminescent materials enable continuous and rapid response to electrical signals without the inertia associated with liquid crystal molecules. The electroluminescence process occurs almost instantaneously when voltage is applied, providing fast response times while maintaining energy efficiency through direct electrical-to-optical conversion without intermediate mechanical movements
4Ease of manufacture
If conventional display devices are used, then display functionality is achieved, but production cost is high
Solution Approach 1:
The patent employs a common electrode structure and shared encapsulation layers across all sub-pixels, reducing the number of separate components needed. The organic emissive layers can be deposited using solution processing techniques that allow large-area manufacturing with relatively simple equipment, lowering production costs while maintaining pixel uniformity through controlled deposition processes
5Duration of action of stationary object
If conventional display devices are used, then display functionality is achieved, but lifespan is short
Solution Approach 1:
Multiple inorganic encapsulation layers are deposited beforehand to protect the organic emissive materials from environmental degradation. These protective layers prevent oxygen and moisture penetration that would otherwise accelerate material degradation, thereby extending device lifespan while the organic materials continue to provide efficient electroluminescence with low power consumption
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 achieves energy-efficient displays with accurate color contrast, high response time, low production costs, long lifespan, and even brightness levels, outperforming conventional LCD and OLED technologies.
Implementation Method 1
a plurality of phosphor layers filling the plurality of grooves formed on the panel substrate and configured to emit light through wavelength conversion of introduced light
Data Source
AI summary
A display apparatus includes a light emitting diode part and a thin film (TFT) panel configured to drive the light emitting diode part. The light emitting diode part includes a transparent support substrate, a plurality of light emitting diodes, a plurality of phosphor layers disposed on the support substrate covering at a first portion of the plurality of light emitting diodes and configured to emit light through a conversion of introduced light. Another display apparatus includes a light emitting diode part including a plurality of light emitting diodes and a TFT panel configured to drive the light emitting diode part. The TFT panel includes a panel substrate including a TFT driving circuit and a plurality of grooves formed on the panel substrate. The TFT panel also includes a plurality of phosphor layers the plurality of grooves and configured to emit light through wavelength conversion of introduced light.