Micro LED Particle Alignment via Non-Contact Capacitive Power
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Solution Overview
Problem
In the manufacturing of micro LED displays, the existing methods require additional processing time and complexity due to the need for precise position control and direct contact between power supply lines and electrodes on glass substrates for effective power supply, which increases overall processing time.
Innovation Solution
A particle alignment device and method that uses a glass substrate with a formed pattern, a gripper supporting the substrate, and an AC signal generator to supply power non-contactually through opposing glass and gripper electrodes, eliminating the need for direct contact and precise position control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If direct contact method is used to connect power supply line and electrode, then power supply efficiency is improved, but processing time is increased due to position control and connection checking
Solution Approach 1:
The patent replaces the mechanical direct contact connection system with a non-contact power supply system using electromagnetic induction. The lower electrode on the gripper and upper electrode on the glass substrate form a capacitive coupling structure that transmits power without mechanical contact, eliminating the need for position control and connection checking while maintaining power supply efficiency
Solution Approach 2:
The patent introduces the glass substrate itself as an intermediary medium that forms a capacitor between the lower electrode (on gripper) and upper electrode (on glass substrate). This capacitive coupling acts as the intermediary to transfer power non-contactually, resolving the contradiction between maintaining power supply efficiency and reducing processing time
2Reliability
If direct contact connection is used, then power supply reliability is improved, but device complexity is increased due to position control mechanisms
Solution Approach 1:
The patent eliminates the mechanical position control system by replacing direct contact connection with non-contact capacitive coupling. The power supply reliability is maintained through the electric field coupling between electrodes, while the complexity of mechanical position control and alignment mechanisms is completely removed
Solution Approach 2:
The patent extracts and removes the position control mechanism from the system by using non-contact power supply. The capacitive coupling structure allows power transmission without requiring precise alignment or mechanical control systems, thereby reducing device complexity while maintaining connection reliability
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 reduces overall processing time and simplifies the manufacturing process by enabling efficient power supply and particle alignment without the need for direct contact, thereby streamlining the production of micro LED displays.
Implementation Method 1
an AC signal generator connected to the gripper electrode to generate an AC signal
Data Source
AI summary
A particle alignment device for a micro LED display, the particle alignment device includes a glass electrode arranged on one surface of the glass substrate on which a pattern is formed, a gripper supporting a glass substrate, the gripper including a gripper electrode interposed between the glass substrate and the gripper, a resistance unit connecting the glass electrode, and an AC signal generator connected to the gripper electrode to generate an AC signal. The glass electrode and the gripper electrode are arranged to oppose each other with the glass substrate interposed therebetween.