Inorganic Light Emitting Elements for Compact Displays
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Solution Overview
Problem
Existing display technologies, such as LCDs and OLEDs, face challenges in achieving high resolution, small size, and excellent characteristics like brightness, contrast ratio, lifetime, multi-depth, form factor, color purity, and power efficiency.
Innovation Solution
A display apparatus featuring a substrate with a layered structure comprising inorganic light emitting elements, transistors, and a color control member, where the transistors are electrically connected to the light emitting elements and the color control member adjusts the light color, with a yellow recycling film and blue cut filter used to enhance light efficiency and color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If LCD or OLED technology is used, then display functionality is achieved, but device size becomes large or lifetime becomes short
Solution Approach 1:
The patent transitions from organic OLED materials to inorganic semiconductor materials (GaN, GaP, GaAs), fundamentally changing the material parameter to achieve both extended lifetime and reduced device size. The inorganic light emitting elements provide superior stability and longevity while enabling compact form factors suitable for wearable displays.
Solution Approach 2:
The display employs composite material structures including inorganic semiconductor layers, organic ligands for quantum dots, and multiple functional coatings (anti-reflective, protective). This composite approach combines the advantages of different materials to achieve high brightness, long lifetime, and small size simultaneously.
2Illumination intensity
If inorganic light emitting elements are used, then brightness and lifetime are improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is divided into distinct segments: substrate preparation, inorganic layer deposition via sputtering or MOCVD, quantum dot formation, and encapsulation. This segmentation allows each step to be optimized independently and facilitates scalable production of high-brightness displays.
Solution Approach 2:
The patent uses intermediary materials and processes such as organic ligands for quantum dot stabilization, buffer layers for stress management, and protective encapsulation layers. These intermediaries simplify the overall manufacturing by managing interface compatibility and reducing defect formation.
3Manufacturing precision
If high resolution is achieved, then display quality improves, but device size increases
Solution Approach 1:
The patent achieves high resolution in a compact size by transitioning to vertical or nanowire light emitting structures. This dimensional change from planar to vertical architecture allows multiple pixels to be stacked or arranged in three-dimensional space, increasing pixel density without proportionally increasing device footprint.
Solution Approach 2:
The display employs thin-film inorganic semiconductor structures and flexible substrate technologies that enable high-resolution displays to be manufactured in compact, even flexible, form factors. The thin-film approach reduces the physical space required for each pixel while maintaining high resolution through precise film deposition control.
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 enables the creation of high-resolution, compact display apparatuses with improved brightness, contrast, and color purity, suitable for applications like augmented and virtual reality, while reducing manufacturing complexity and size constraints.
Implementation Method 1
a first layered structure provided on the substrate and including an array of a plurality of light emitting elements comprising an inorganic material
Implementation Method 2
a third layered structure including a color control member configured to adjust a color of light generated by the plurality of light emitting elements
Data Source
AI summary
Provided is a display apparatus. The display apparatus may include a monolithic device in which a light emitting element array, a transistor array, and a color control member are monolithically provided on one substrate. The display apparatus may include a first layered structure including the light emitting element array, a second layered structure including the transistor array, and a third layered structure including the color control member, wherein the second layered structure may be between the first layered structure and the third layered structure. The light emitting element array may include a plurality of light emitting elements comprising an inorganic material. The plurality of light emitting elements may have a vertical nanostructure.