Conductive Adhesive Layer for Flexible Semiconductor Displays
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Solution Overview
Problem
Current display technologies, such as LCDs and AMOLEDs, face issues like slow response time, short lifespan, low flexibility, and high power consumption, which are not adequately addressed by existing solutions.
Innovation Solution
A display device utilizing semiconductor light emitting devices with a conductive adhesive layer that includes conductors to connect inorganic semiconductor light emitting devices, allowing for flexible, high-speed, and low-power operation, eliminating the need for additional backlight and color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If liquid crystal displays (LCDs) are used, then low profile can be achieved, but response time is slow and flexibility is difficult to implement
Solution Approach 1:
The patent changes the fundamental operating principle from liquid crystal modulation to direct semiconductor light emission, transforming the display mechanism to achieve fast response time while maintaining thin profile through elimination of backlight and color filter layers
2Length of moving object
If liquid crystal displays (LCDs) are used, then low profile can be achieved, but flexibility is difficult to implement
Solution Approach 1:
The patent transitions from rigid LCD structure to flexible semiconductor-based structure, enabling flexibility while maintaining thin profile through direct light emission without backlight units
Solution Approach 2:
The patent employs flexible substrates and conductive adhesive layers combining electrical conductivity with mechanical flexibility, allowing the display to be bent or rolled while maintaining functionality
3Adaptability or versatility
If active matrix organic light emitting diodes (AMOLEDs) are used, then flexibility can be achieved, but life span is short and yield is low
Solution Approach 1:
The patent replaces organic materials with inorganic semiconductor materials that offer superior stability and longevity, eliminating the short lifespan issue of OLEDs while maintaining flexibility through appropriate substrate and adhesive selection
Solution Approach 2:
The patent uses composite structures combining flexible substrates with inorganic semiconductor light emitting devices and conductive adhesive layers, achieving both flexibility and long lifespan simultaneously
4Speed
If semiconductor light emitting devices with conductive adhesive layer are used, then flexibility and fast response time are achieved, but light blocking between devices is required
Solution Approach 1:
The conductive adhesive layer performs multiple functions simultaneously: electrical connection between substrate and semiconductor devices, mechanical adhesion, and optical isolation by blocking light between adjacent devices, eliminating the need for separate light blocking structures
Solution Approach 2:
The patent merges the electrical connection function and light blocking function into a single conductive adhesive layer, reducing the number of layers and simplifying the overall device structure while achieving fast response time
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 enables a flexible, high-speed display with long lifespan and low power consumption, achieving excellent luminance and efficiency while suppressing optical interference and allowing for a rollable display device with HD image quality.
Implementation Method 1
the conductive adhesive layer blocks light generated from the plurality of semiconductor light emitting devices
Implementation Method 2
light emitting diodes (LEDs) are well known light emitting devices for converting an electrical current to light
Implementation Method 3
a plurality of semiconductor light emitting devices electrically connected to the line electrode to generate light
Data Source
Figure 1~2
Figure 3a~5a
Figure 5b~5c
AI summary
A display device according to an embodiment of the present disclosure may include a lower substrate disposed with a line electrode at an upper portion thereof, a plurality of semiconductor light emitting devices electrically connected to the line electrode to generate light and disposed to be separated from one another, and an adhesive portion comprising a body configured to fix the location of the lower substrate to that of the semiconductor light emitting device, and a conductor dispersed within the body to electrically connect the lower substrate to the semiconductor light emitting device, wherein the plurality of semiconductor light emitting devices form one pixel region (P) having red, green and blue semiconductor light emitting devices that emit red, green and blue light, and contain a material selected from inorganic semiconductor materials, and the adhesive portion blocks light generated from the plurality of semiconductor light emitting devices.