Segmented Alignment Wiring for Low-Voltage-Drop LED Displays
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Solution Overview
Problem
Existing display devices face challenges in minimizing voltage drop during the alignment of light emitting elements, which affects the efficiency and durability of inorganic LEDs, particularly in high-temperature environments and large-area displays.
Innovation Solution
A display device design featuring separate alignment wiring areas with distinct alignment signals applied to each area, minimizing voltage drop and improving the alignment of light emitting elements by forming electric fields only in specific areas during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single alignment wiring is used for the entire display area, then the device structure is simple, but voltage drop increases and alignment precision deteriorates
Solution Approach 1:
The display area is divided into multiple alignment areas, each with its own alignment wiring. This segmentation allows independent control of alignment signals in different regions, reducing voltage drop and improving alignment precision without requiring a single complex wiring structure spanning the entire display area.
Solution Approach 2:
Different alignment wirings are provided for different alignment areas, allowing localized optimization of alignment signals. Each alignment wiring can be independently designed and controlled to match the specific requirements of its corresponding alignment area, improving overall alignment precision while managing complexity through local rather than global uniformity.
2Productivity
If alignment signal voltage is increased to reduce voltage drop, then alignment efficiency improves, but energy consumption and potential damage to light emitting elements increases
Solution Approach 1:
By segmenting the alignment area into multiple smaller regions with separate alignment wirings, the electrical path length for each wiring is reduced. This allows effective alignment signals to be applied to each segment without requiring high voltage across the entire display area, thereby improving alignment efficiency while reducing energy consumption and avoiding damage to light emitting elements.
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, reducing voltage drop and improving the overall performance of inorganic LEDs, especially in high-temperature environments and large-area displays.
Implementation Method 1
a transfer method using dielectrophoresis (DEP) has been developed for a manufacturing process
Data Source
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 alongside the first area in a second direction intersecting the first direction, at least one first light emitting element in the first area, at least one second light emitting element in the second area, at least one first wiring coupled to an end of the first light emitting element in the first area and that extends in the first direction and at least one second wiring coupled to an end of the second light emitting element in the second area and that extends in the first direction, wherein the first wiring and the second wiring are electrically isolated from each other.