μLED Display Structure for Precise Brightness and Lower Power
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Solution Overview
Problem
Current display technologies, such as TFT-LCD and OLED, face challenges with high power consumption, inaccurate brightness control, and increased manufacturing costs, particularly due to the constant operation of backlight units and the need for complex pixel driving circuits.
Innovation Solution
A display apparatus utilizing micro-light emitting diodes (μLEDs) with a TFT panel unit, where μLEDs are arranged in a matrix on a substrate and connected via an anisotropic conductive film, allowing for precise control of brightness and reduced power consumption by enabling individual pixel-level backlight operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one LED is used as a light source for many pixels in TFT-LCD, then device complexity is reduced, but power consumption cannot be regulated accurately and brightness control becomes imprecise
Solution Approach 1:
The backlight unit is divided into multiple independently controllable LED groups, where each LED group corresponds to a specific pixel or region. This segmentation allows individual control of each LED's brightness and operation, enabling precise brightness regulation while maintaining manageable device complexity through modular architecture.
2Illumination intensity
If the backlight unit is always turned on in TFT-LCD, then continuous illumination is provided, but power consumption remains constant and cannot be reduced
Solution Approach 1:
The LED backlight units operate in a pulsed manner rather than continuously, with each LED being turned on only when its corresponding pixel requires illumination. This periodic operation allows the display to maintain continuous overall illumination while significantly reducing power consumption by keeping individual LEDs off during periods when their associated pixels do not need light.
3Use of energy by moving object
If OLED is used to reduce power consumption, then efficiency improves compared to traditional backlights, but power consumption remains higher than inorganic LED and manufacturing costs increase
Solution Approach 1:
The patent employs nitride semiconductor LEDs with specifically optimized structural parameters and material composition to achieve superior power efficiency compared to both OLED and traditional LED backlights. By carefully controlling the refractive indices, thicknesses, and material properties of multiple layers in the LED structure, the invention maximizes light extraction efficiency and minimizes power consumption while maintaining compatibility with conventional manufacturing processes.
4Measurement precision
If μLEDs are used with individual pixel control, then brightness regulation precision improves, but device complexity increases
Solution Approach 1:
The patent implements a universal control architecture where a single control circuit design can manage multiple LED groups across different display sizes and resolutions. The modular LED group structure, where each group contains the same sub-components (blue LED, phosphor layers, reflective layers), allows the system to scale while maintaining consistent control complexity. This multi-functional design enables the same hardware framework to serve various display configurations without proportionally increasing control circuit 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
The μLED display apparatus achieves low power consumption, accurate brightness regulation, and reduced manufacturing costs by using nitride semiconductor μLEDs and a flexible substrate, making it suitable for wearable devices and smartphones while maintaining high efficiency and resolution.
Implementation Method 1
A light emitting diode refers to an inorganic semiconductor device configured to emit light through recombination of electrons and holes
Implementation Method 2
emit light through recombination of electrons and holes
Implementation Method 3
connected via an anisotropic conductive film
Data Source
AI summary
A display apparatus including a panel substrate, and a light emitting source disposed on the panel substrate, in which the light emitting source includes a substrate, an electrode disposed on the substrate, a light emitting structure disposed on the electrode and having an n-type semiconductor layer, a p-type semiconductor layer, an n-type electrode, and a p-type electrode, a transparent electrode disposed on the light emitting structure, and an adhesive layer disposed on the light emitting structure, the n-type electrode is electrically connected to the electrode, the p-type electrode is electrically connected to the transparent electrode, and the adhesive layer is disposed between the p-type electrode and the transparent electrode.