Transparent Dual-Emissive Display Pixel Structure With Reflective Layers
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Solution Overview
Problem
Current display devices lack the ability to provide transparent functionality when not in use and simultaneous dual-sided emissive capabilities, with limited reliability and brightness due to the use of organic materials.
Innovation Solution
A double-sided emissive transparent display device is developed, featuring top and bottom emissive pixels with reflective layers that fully output light, utilizing inorganic light emitting elements for improved reliability and brightness, and allowing different information to be displayed on each surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic light emitting elements are used in display devices, then the display can provide color and image information, but the reliability and lifetime are reduced compared to inorganic materials
Solution Approach 1:
The patent changes the material parameter from organic to inorganic light emitting elements, fundamentally altering the chemical composition and physical properties of the display device to achieve superior reliability and lifetime while maintaining light emitting functionality
Solution Approach 2:
The patent employs composite material structures by integrating inorganic light emitting elements with transparent substrate materials and reflective layer materials, creating a multi-material system that combines the advantages of each material type for enhanced overall performance
2Illumination intensity
If a display device is made transparent to let users see the background, then the aesthetic appeal and integration are improved, but the ability to display high-brightness images is compromised
Solution Approach 1:
The patent segments the display device into distinct functional regions: transparent non-emissive regions that maintain background visibility and emissive regions with inorganic light emitting elements that provide high-brightness display, allowing both functions to coexist without compromising each other
Solution Approach 2:
The patent introduces reflective layers as intermediary components between the light emitting elements and the transparent substrate, which redirect and enhance light output to achieve high brightness while maintaining overall device transparency when not in use
3Adaptability or versatility
If a single pixel contains both top emissive and bottom emissive regions, then dual-sided display capability is achieved, but the pixel structure complexity increases
Solution Approach 1:
The patent merges multiple light emitting elements and their associated circuitry into a single integrated pixel structure, combining top emissive and bottom emissive regions within one pixel unit to achieve dual-sided display capability while managing structural complexity through unified design
Solution Approach 2:
The patent extends the display functionality into the vertical dimension by creating both top and bottom emissive surfaces from a single pixel structure, transforming a traditionally two-dimensional display into a three-dimensional light-emitting architecture
4Illumination intensity
If inorganic light emitting elements are used instead of organic materials, then the brightness and reliability are improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent changes the material parameter from organic to inorganic light emitting elements, fundamentally altering the chemical composition and physical properties of the display device to achieve superior reliability and lifetime while maintaining light emitting functionality
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 device achieves transparency when not in use and provides high-brightness, dual-sided image display with enhanced reliability and image quality through the use of inorganic light emitting elements and strategically designed reflective layers.
Implementation Method 1
a bottom reflective layer that is disposed under the first light emitting element to overlap the first light emitting element and has a greater size than the first light emitting element... and a top reflective layer that is disposed on the second light emitting element to overlap the second light emitting element and has a greater size than the second light emitting element
Data Source
AI summary
A display device includes a first pixel that emits light toward an upper side, a second pixel that emits light toward a lower side, a plurality of lines and a pad electrode. The first pixel includes a first light emitting element, a first pixel circuit connected to the first light emitting element and some of the plurality of lines and a bottom reflective layer that is under the first light emitting element to overlap the first light emitting element and has a greater size than the first light emitting element. The second pixel includes a second light emitting element, a second pixel circuit connected to the second light emitting element and the others of the plurality of lines, and a top reflective layer that on the second light emitting element to overlap the second light emitting element and has a greater size than the second light emitting element.