Multi-Tunnel Junction LED With Horizontally Separated Regions
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Solution Overview
Problem
Multi-tunnel junction LEDs face limitations in reducing light emitting region size, increasing power consumption due to efficiency differences, and complex manufacturing steps, leading to high costs and defective rates in display devices.
Innovation Solution
A light emitting element with horizontally separated light emitting regions, each with distinct conductive semiconductor layers and pixel electrodes, connected by a common electrode, allowing independent control and efficient pixel arrangement, and a manufacturing method involving vapor-deposition and contact hole formation for reduced complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a multi-tunnel junction LED structure is used to increase internal quantum efficiency, then light emitting efficiency is improved, but the light emitting region size is reduced due to electrode forming steps
Solution Approach 1:
The patent divides a single light emitting element into multiple light emitting regions (first, second, and third light emitting regions) with different light emitting colors. Each region has its own pixel electrode for independent control, allowing the element to function as multiple sub-elements while maintaining high efficiency in each region.
Solution Approach 2:
The patent transitions from a single light emitting region to multiple horizontally separated light emitting regions within the same planar element. This dimensional expansion allows simultaneous high efficiency and adequate size by distributing the light emitting function across multiple regions rather than concentrating it in one area.
2Adaptability or versatility
If different light emitting colors are implemented in a single element, then color versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple light emitting regions with different colors (red, green, blue) into a single light emitting element structure. All regions share common structural components such as the substrate, lower conductive semiconductor layers, and upper conductive semiconductor layers, reducing manufacturing complexity compared to producing separate elements for each color.
Solution Approach 2:
The patent creates a universal light emitting element structure that can perform multiple functions by emitting different colors of light. The element can simultaneously function as a red, green, and blue light source through its multiple light emitting regions, eliminating the need for separate single-color elements.
3Productivity
If multiple light emitting regions are integrated in a single element, then pixel arrangement efficiency is improved, but the requirement for independent control increases device complexity
Solution Approach 1:
The patent provides each light emitting region with its own pixel electrode (first pixel electrode, second pixel electrode, third pixel electrode) for independent control. This segmentation of control allows each region to be independently activated or deactivated, enabling flexible pixel arrangement and control strategies.
Solution Approach 2:
The patent introduces lower conductive semiconductor layers and upper conductive semiconductor layers as intermediary structures that facilitate electrical connection between the pixel electrodes and the light emitting regions. These intermediary layers enable independent control of each region while maintaining a compact integrated structure.
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
This solution enables efficient pixel arrangement, independent control of light emitting regions, and reduced production costs, addressing power consumption and manufacturing complexity issues in display devices.
Implementation Method 1
a first light emitting layer and a plurality of conductive semiconductor layers laminated on upper and lower portions of the first light emitting layer, a second light emitting cell including a second light emitting layer configured to emit light different from the first light emitting layer
Implementation Method 2
a plurality of conductive semiconductor layers laminated on upper and lower portions of the first light emitting layer
Data Source
AI summary
A light emitting element, a manufacturing method therefor, and a display device including the light emitting element are disclosed. Particularly, disclosed are a multi-tunnel junction light emitting element having two or more light emitting regions, which are horizontally separated from each other, and a manufacturing method therefor, and disclosed is a display device which includes the light emitting element so as to efficiently arrange pixels and independently control the light emitting regions.