Rotatable LED Display Double-Ended Support Vibration Reduction
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Solution Overview
Problem
Rotatable display devices using a single-shaft support structure suffer from vibration, noise, and image shaking due to insufficient stiffness, which degrades the quality of the product and makes it prone to damage from external impacts.
Innovation Solution
A double-ended support structure is implemented, where the rotary portion is stably supported on both sides, increasing the natural frequency and reducing vibration and noise without the need for lightweight and high-stiffness materials, by using a configuration with a fixed portion, a rotary portion, and a light source module with light-emitting element arrays mounted on panels, and a rotation coupling portion connected to the casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-shaft support structure is used, then the device complexity is reduced, but vibration and noise increase due to insufficient stiffness
Solution Approach 1:
The single shaft is divided into two separate shafts (first shaft and second shaft) that independently support opposite sides of the rotary portion. This segmentation allows each shaft to be optimized for its specific support function, improving overall stiffness and reducing vibration without significantly increasing system complexity.
Solution Approach 2:
The support structure transitions from a single-point support (one shaft) to a distributed multi-point support system (two shafts at opposite sides). This dimensional change in the support architecture enhances structural stiffness and distributes mechanical loads, thereby reducing vibration and noise generation.
2Ease of operation
If the rotational speed is increased to reduce flickering, then the image quality improves, but vibration and noise increase due to resonance
Solution Approach 1:
The dual-shaft support structure is designed to alter the natural frequency characteristics of the rotary portion, moving the resonance peak away from typical operating speeds. This allows the device to operate at higher rotational speeds for better image quality without encountering resonant vibration and noise.
3Object-generated harmful factors
If lightweight and high-stiffness materials are used, then vibration and noise are reduced, but the manufacturing cost increases
Solution Approach 1:
Instead of relying on expensive lightweight high-stiffness materials, the patent extracts the vibration reduction function into the mechanical structure itself by implementing a dual-shaft support configuration. This structural solution achieves vibration and noise reduction using conventional materials, avoiding the need for costly special materials.
4Object-generated harmful factors
If the shaft stiffness is increased to reduce vibration, then the natural frequency increases, but the device becomes more susceptible to damage from external impacts
Solution Approach 1:
The rotary portion is divided into multiple segments supported by separate shafts, allowing the structure to distribute impact forces across multiple support points. This segmentation prevents force concentration on a single stiff shaft, maintaining impact resistance while achieving vibration reduction through the overall structural configuration.
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 increased natural frequency significantly reduces vibration and noise, allowing the rotary portion to rotate smoothly and preventing image shaking, thereby enhancing the product's quality and durability.
Implementation Method 1
a light-emitting diode (LED), which is a semiconductor light-emitting element that converts current into light
Implementation Method 2
various letters, graphics, and videos may be recognized by a human due to an afterimage effect
Implementation Method 3
a fixed portion including a motor, a rotary portion located on the fixed portion and including a first side coupled to the motor
Data Source
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AI summary
The present disclosure can be applied to display device-related technical fields and relates to a rotatable display device using, for example, light-emitting diodes (LEDs), which are semiconductor light-emitting diodes. According to the present disclosure, the rotatable display device using light-emitting diodes may comprise: a fixing unit comprising a motor; a rotation unit which is provided on the fixing unit and has a first side coupled to the motor and a second side rotatably coupled to a rotation coupling part, and rotates, the second side being a side opposite to the first side; and a light source module provided in the rotation unit and comprising at least one panel provided along a virtual cylindrical outer circumferential surface thereof and a light-emitting diode array in which individual pixels are provided on each panel in the longitudinal direction.