Display Alignment Wiring Layout to Reduce LED Voltage Drop
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Solution Overview
Problem
Display devices face challenges in minimizing voltage drop during the alignment of light emitting elements, which affects the efficiency and durability of the display, particularly in high-temperature environments and in achieving uniform alignment of light emitting elements with different colors.
Innovation Solution
The implementation of a display device with different alignment wirings in various alignment areas allows for the application of specific alignment signals to each area, minimizing voltage drop and improving the alignment of light emitting elements by forming an electric field only in the corresponding areas during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single alignment wiring is used for all alignment areas, then the device structure is simple, but voltage drop occurs during alignment of light emitting elements
Solution Approach 1:
The alignment wiring is divided into multiple separate alignment wirings (first alignment wiring and second alignment wiring) corresponding to different alignment areas (first alignment area and second alignment area). This segmentation allows each wiring to independently supply alignment signals to its respective area, reducing voltage drop and improving signal stability without excessive complexity.
Solution Approach 2:
Different alignment wirings are provided for different alignment areas, allowing localized optimization of alignment signal delivery. Each alignment wiring is specifically configured for its corresponding area, ensuring adequate voltage and signal quality locally while maintaining overall system functionality.
2Productivity
If alignment signal is applied to all alignment areas simultaneously, then the alignment process is simplified, but voltage drop increases and alignment uniformity deteriorates
Solution Approach 1:
The alignment process is segmented into separate alignment operations for different alignment areas. Each alignment area receives alignment signals through its dedicated alignment wiring, enabling independent control and precise alignment without the voltage drop issues that would result from applying signals to all areas simultaneously through a single wiring.
3Ease of manufacture
If organic material is used as fluorescent material, then manufacturing process is simple and flexible characteristics are achieved, but durability in high-temperature environment and blue light efficiency are reduced
Solution Approach 1:
The patent changes the material parameter from organic fluorescent material to inorganic semiconductor fluorescent material. This parameter change fundamentally improves high-temperature durability and blue light efficiency while maintaining manufacturing feasibility through the dielectrophoresis transfer method, resolving the contradiction between ease of manufacture and reliability.
4Ease of manufacture
If organic material is used as fluorescent material, then manufacturing process is simple, but blue light efficiency is reduced
Solution Approach 1:
The patent changes the fluorescent material parameter from organic to inorganic semiconductor, which inherently provides superior blue light efficiency. The inorganic LED structure maintains manufacturing simplicity through the dielectrophoresis transfer process, effectively resolving the efficiency-manufacturability contradiction.
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 approach enhances the alignment and efficiency of light emitting elements by reducing voltage drop and improving the alignment process, leading to better durability and performance, especially in high-temperature environments and for elements emitting different colors.
Implementation Method 1
a plurality of very-small LEDs connected to the first electrode and the second electrode, and two or more switches which connect the first signal line and the second signal line to the first electrode
Data Source
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AI summary
A display device and a method of manufacturing the same are provided. The display device comprises a first area which extends in a first direction, a second area which extends in the first direction and is disposed alongside the first area in a second direction intersecting the first direction, at least one first light emitting element which is disposed in the first area, at least one second light emitting element which is disposed in the second area, at least one first wiring which is connected to an end of the first light emitting element in the first area and extends in the first direction and at least one second wiring which is connected to an end of the second light emitting element in the second area and extends in the first direction, wherein the first wiring and the second wiring are electrically isolated from each other.