Quantum Dot M-LED Display Panel for Uniform Full-Color Transfer
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Solution Overview
Problem
The mass production of M-LED display panels faces challenges such as low yield, long repair times, and poor display uniformity due to the difficulty in transferring M-LED units with three light-emitting colors, and the inconsistency in wavelength and brightness of small-sized M-LED chips.
Innovation Solution
A display panel design incorporating a transparent substrate, light shielding layer, quantum dot layer, and monochromatic light-emitting units, which eliminates the need for separate transfer of red, green, and blue units, and utilizes a quantum dot layer to enhance color consistency and uniformity, with a light shielding layer ensuring an integrated black state and reducing color crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mass transfer method is used to transfer M-LED units with three light-emitting colors, then production efficiency is improved, but manufacturing precision deteriorates due to poor maturity of mass transfer technology
Solution Approach 1:
The patent divides the color emission function into separate components: monochromatic M-LED units provide the base light emission, while quantum dot layers (red quantum dots, green quantum dots) are applied in specific regions to generate different colors. This segmentation allows each component to be optimized independently, avoiding the complexity of transferring three different colored M-LED units while achieving full-color display.
Solution Approach 2:
The patent introduces quantum dot layers as intermediary materials between the monochromatic light source and the final color output. The quantum dots convert the monochromatic light into specific color wavelengths, acting as a mediator that enables color generation without requiring color-specific LED units. This intermediary approach simplifies the transfer process while maintaining color accuracy.
2Productivity
If M-LED units with three light-emitting colors are transferred in batches, then productivity is improved, but reliability deteriorates due to low yield of packaging process
Solution Approach 1:
The patent separates the complex three-color M-LED unit into simpler monochromatic units combined with quantum dot layers. This segmentation reduces the complexity of each individual transfer unit, making the batch transfer process more reliable and less prone to packaging failures. The simpler structure of monochromatic units with quantum dot overlays is easier to handle and package successfully.
Solution Approach 2:
The patent changes the fundamental parameter of light emission from requiring three different colored LED units to using a single monochromatic source with quantum dot conversion. This parameter change simplifies the transfer process and improves packaging yield by reducing the number of components that need to be precisely positioned and connected during batch transfer.
3Length of moving object
If small-sized M-LED units are used, then device miniaturization is achieved, but manufacturing precision deteriorates due to inconsistency in wavelength and brightness
Solution Approach 1:
The patent uses quantum dot layers as intermediary materials that sit between the monochromatic light source and the viewer. These quantum dot layers are applied in controlled patterns (red quantum dots in first regions, green quantum dots in second regions) to ensure consistent color output. The quantum dots act as a buffer that standardizes the wavelength and brightness characteristics, compensating for variations in the small-sized M-LED units.
Solution Approach 2:
The patent applies different quantum dot layers in specific local regions: red quantum dots in first regions corresponding to first light-emitting units, and green quantum dots in second regions corresponding to second light-emitting units. This local quality approach ensures that each region receives the appropriate color conversion, maintaining wavelength and brightness consistency across the entire display despite the small size of individual units.
4Manufacturing precision
If quantum dot layer is added to achieve color consistency, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent uses a universal monochromatic M-LED unit design that can serve multiple color functions through the addition of different quantum dot layers. The same basic LED unit structure is used throughout, and by simply changing the quantum dot layer material and position, different colors are achieved. This universality reduces overall device complexity compared to having three different types of colored LED units.
5Manufacturing precision
If light shielding layer is used to maintain integrated black state, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The patent extracts the light shielding function into a separate, dedicated layer positioned between the M-LED units and the quantum dot layers. This extracted shielding layer is responsible solely for blocking stray light and maintaining the integrated black state, while the other layers focus on color generation and emission. This separation of functions improves display uniformity without excessively complicating the overall structure, as each layer has a clear, singular purpose.
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
Improves display uniformity and reduces process complexity by ensuring consistent light emission and color accuracy, while maintaining an integrated black state and minimizing color crosstalk, thereby enhancing the display quality of M-LED panels.
Implementation Method 1
a quantum dot layer disposed on one side of the transparent substrate away from the light shielding layer. The quantum dot layer includes a plurality of first quantum dot units and a plurality of second quantum dot units
Implementation Method 2
a light shielding layer disposed on a first side of the transparent substrate... the light shielding layer ensuring an integrated black state and reducing color crosstalk
Data Source
AI summary
Provided is a display panel including light-emitting unit package, which includes: a transparent substrate, a light shielding layer, a quantum dot layer and a light-emitting unit layer. The light shielding layer includes multiple first openings, multiple second openings, and multiple third openings. The quantum dot layer includes multiple first quantum dot units and multiple second quantum dot units. Each first quantum dot unit is correspondingly disposed in each first opening. Each second quantum dot unit is correspondingly disposed in each second opening. The light-emitting unit layer includes multiple first light-emitting units, multiple second light-emitting units, and multiple third light-emitting units with the same light-emitting color, each first light-emitting unit, each second light-emitting unit, and each third light-emitting unit are disposed corresponding to each first opening, each second opening, and each third opening, respectively.