LED Light Source Module With Stacked Emitter Layers
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Solution Overview
Problem
Conventional display devices with LED light sources require a separate backlight unit, limiting their compactness and efficiency, and struggle to achieve high luminance and flexible aspect ratios.
Innovation Solution
An LED light source module with a light emitting stacked body comprising a base insulating layer and sequentially stacked light emitting layers of different wavelengths, connected by interlayer insulating layers and electrode structures, allowing for independent pixel control and elimination of the need for a separate backlight unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate backlight unit is used in conventional display devices, then the display can achieve sufficient brightness, but the device size increases and compactness is reduced
Solution Approach 1:
The patent merges the backlight unit and display panel into a single integrated structure where the LED light emitting stacked body serves dual functions as both the light source and display element. This eliminates the need for a separate backlight unit while maintaining brightness requirements, thereby reducing overall device volume and achieving compactness.
Solution Approach 2:
The LED light emitting stacked body performs multiple functions simultaneously: it generates light for display purposes and directly forms the display pixels. This multi-functional design eliminates redundant components and reduces the overall device footprint while maintaining adequate brightness output.
2Adaptability or versatility
If conventional LED display structures are used, then the display can function properly, but the aspect ratio and display area flexibility are limited
Solution Approach 1:
The display is segmented into multiple independently controllable light emitting stacked bodies arranged in a matrix pattern. Each stacked body can be individually addressed and controlled, enabling flexible display of various aspect ratios and large display areas without requiring complex mechanical adjustments or additional structural components.
Solution Approach 2:
The patent transitions from conventional planar LED arrangements to a vertically stacked three-dimensional structure. This dimensional change allows for more efficient space utilization and enables flexible aspect ratios and large display areas by arranging multiple light emitting stacked bodies in both horizontal and vertical dimensions.
3Volume of moving object
If individual LED devices are used as single pixels, then the display can be compact, but the light efficiency and luminance are reduced
Solution Approach 1:
Multiple active layers are nested within a single light emitting stacked body structure, with each active layer contributing to the overall light output. This nested configuration increases the effective light generating capacity within a compact footprint, thereby improving light efficiency and luminance without increasing display size.
Solution Approach 2:
The stacked body structure enables continuous light emission across multiple active layers simultaneously when activated, maximizing the useful light output from each compact pixel unit. This continuous multi-layer emission improves overall light efficiency compared to single-layer individual LED devices.
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
Enables compact, high-luminance displays with flexible aspect ratios and large display areas, as each pixel can be independently driven to emit different colors, enhancing light efficiency and display flexibility.
Implementation Method 1
a first light emitting layer, a second light emitting layer, a third light emitting layer sequentially stacked on the base insulating layer, and configured to emit light having different wavelengths
Data Source
AI summary
An LED light source module includes a light emitting stacked body, and a first through electrode structure and a second through electrode structure passing through a portion of the light emitting stacked body. The light emitting stacked body includes a base insulating layer, light emitting layers sequentially stacked on the base insulating layer, each of the light emitting layers including a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and an active layer disposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, and an interlayer insulating layer disposed between the light emitting layers. The first through electrode structure is connected to the first conductivity-type semiconductor layer of each of the light emitting layers, and the second through electrode structure is connected to any one or any combination of the second conductivity-type semiconductor layer of each of the light emitting layers.