Semiconductor Light Emitting Device Wiring Line Structure
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Solution Overview
Problem
Current display devices, such as LCDs and AMOLEDs, face issues like slow response time, short lifespan, and limited flexibility, while semiconductor light emitting devices have insufficient light emitting efficiency.
Innovation Solution
A display device structure incorporating a semiconductor light emitting device with a second wiring line formed in a trapezoidal shape surrounding the light-emitting surface to enhance luminance by reflecting light and reduce line resistance, using a phosphor layer to convert light and an antireflection layer to prevent color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wiring line structure is used in semiconductor light emitting devices, then the device structure is simple, but the line resistance is high and luminance is insufficient
Solution Approach 1:
The wiring line structure transitions from a conventional planar configuration to a three-dimensional configuration that surrounds the light-emitting surface. This dimensional change allows the wiring line to serve dual functions: maintaining electrical connection and reflecting light from the light-emitting surface back toward the front surface, thereby reducing line resistance while enhancing luminance without proportionally increasing device complexity
Solution Approach 2:
The wiring line is designed to perform multiple functions simultaneously: it serves as an electrical conductor connecting to the conductive electrode and as a light reflecting surface surrounding the light-emitting surface. This multi-functionality allows a single structural element to address both electrical connectivity and optical performance, reducing the need for additional components
2Reliability
If the wiring line width is increased to reduce resistance, then line resistance decreases, but the pixel pitch increases reducing display resolution
Solution Approach 1:
Instead of increasing the wiring line width in the planar direction which would consume pixel pitch, the wiring line is configured to surround the light-emitting surface in a three-dimensional arrangement. This vertical and circumferential configuration allows the wiring line to achieve sufficient cross-sectional area for low resistance without occupying additional horizontal space that would reduce pixel density
3Illumination intensity
If light is emitted from all surfaces of the semiconductor light emitting device, then total light output increases, but color mixture occurs reducing image quality
Solution Approach 1:
The wiring line is specifically positioned to surround only the light-emitting surface, creating a localized light reflection zone. This localized configuration ensures that light reflected from the wiring line originates from a specific region, preventing color mixture from adjacent pixels while still enhancing the luminance of the targeted light-emitting surface
Solution Approach 2:
The wiring line acts as an intermediary optical element that redirects light from the light-emitting surface back toward the front surface. By positioning the wiring line between the light-emitting surface and the surrounding environment, it serves as a controlled mediator that enhances light output while maintaining spatial separation that prevents color mixture
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 effectively increases luminance and reduces line resistance, enabling flexible display devices with high-definition image quality and improved durability.
Implementation Method 1
the second wiring line can be formed to surround the light-emitting surface of the semiconductor light emitting device to reflect light toward the front surface in the periphery of the semiconductor light emitting device
Implementation Method 2
A plurality of through portions sequentially arranged along one direction to pass through the second wiring line can be formed on the second wiring line
Data Source
AI summary
A display device including a plurality of semiconductor light emitting devices, each corresponding semiconductor light emitting device having a first conductive electrode, a second conductive electrode and a light-emitting surface configured to emit light; a first wiring line electrically connected to the first conductive electrode; and a second wiring line disposed to cross the first conductive electrode, and be electrically connected to the second conductive electrode. Further, the second wiring line is formed to surround a periphery of the light-emitting surface of the semiconductor light emitting devices to reflect light emitted by the light emitting devices toward a front surface of the display device.