RGB Subpixel Layout With Parallel LEDs for High-Resolution Displays
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Solution Overview
Problem
Existing display devices, such as OLEDs and LCDs, face challenges in achieving high-resolution displays with improved luminous efficiency and reliability, particularly in devices using LEDs, where defects in light-emitting elements can lead to yield deterioration.
Innovation Solution
A display device design where light-emitting elements with different shapes and structures are disposed in each subpixel, including parallel connections of multiple elements per subpixel to ensure functionality even if one element fails, and optimizing element sizes to enhance luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple light-emitting elements with different structures are disposed in each subpixel, then luminous efficiency is improved, but device complexity increases
Solution Approach 1:
The display device divides each subpixel into multiple light-emitting elements with different structures (e.g., first light-emitting elements with a first structure and second light-emitting elements with a second structure). This segmentation allows each element to contribute differently to light emission, improving overall luminous efficiency while distributing the complexity across modular components.
Solution Approach 2:
Different regions within subpixels are assigned light-emitting elements with different structures optimized for their specific functions. For example, certain elements may be optimized for peak luminance while others are optimized for efficiency at specific brightness levels, allowing local optimization of performance characteristics.
2Reliability
If multiple light-emitting elements are connected in parallel in each subpixel, then reliability is improved through redundancy, but device complexity increases
Solution Approach 1:
The patent implements redundancy by connecting multiple light-emitting elements in parallel within each subpixel before defects can occur. This beforehand cushioning ensures that if one element fails, others can compensate, maintaining pixel functionality and improving overall display reliability without requiring complex real-time monitoring systems.
3Manufacturing precision
If light-emitting elements with different sizes are disposed in subpixels, then high-resolution display is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the light-emitting elements into different size categories (first light-emitting elements and second light-emitting elements with different planar areas) that can be manufactured using standardized processes. This segmentation allows for controlled variation in element sizes while maintaining manufacturing feasibility through established fabrication techniques.
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 design improves luminous efficiency and minimizes yield loss due to defective pixels by ensuring redundancy in light-emitting elements, thereby enhancing the performance and reliability of high-resolution displays.
Implementation Method 1
a display device, which uses a light-emitting diode (LED)
Data Source
AI summary
A display device comprises a substrate on which subpixels comprising a red subpixel, a green subpixel, and a blue subpixel are defined, a red light-emitting element in the red subpixel, green light-emitting elements in the green subpixel and comprising a first green light-emitting element and a second green light-emitting element connected in parallel to the first green light-emitting element, and blue light-emitting elements in the blue subpixel and comprising a first blue light-emitting element and a second blue light-emitting element connected in parallel to the first blue light-emitting element, wherein the red light-emitting element is different in structure from the green light-emitting elements and the blue light-emitting elements and the green light-emitting elements and the blue light-emitting elements are identical in structure. Therefore, the display device has improved the luminous efficiency of each of the subpixels, and thus can provide the high-resolution display device.