Flexible Display Rotation Module for Motorless Screen Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices with flexible displays lack a suitable mechanism to smoothly draw out and expand the screen without the need for electric driving devices like motors, which hinders space efficiency and simplification of screen expansion structures.
Innovation Solution
The electronic device incorporates a rotation module that includes a cylindrical housing, a shaft, cylindrical cams, guide pins, and springs, allowing the flexible display to be expanded by converting rotational motion into linear motion, thereby eliminating the need for electric driving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric driving devices like motors are used to draw out the flexible display, then the screen expansion function is achieved, but the space efficiency deteriorates and the structure becomes complex
Solution Approach 1:
The patent removes the electric driving device (motor) from the system entirely, extracting only the necessary mechanical components (cylindrical cam, guide pin, spring) to achieve screen expansion. This eliminates the complexity associated with motors while maintaining the expansion function through pure mechanical means.
Solution Approach 2:
The spring-loaded cylindrical cam mechanism automatically draws out the flexible display when activated, using the spring's stored energy to perform the work. The system serves itself by converting rotational motion of the cylindrical housing into linear motion of the cam, which then pulls the display without requiring external electric power.
2Ease of operation
If electric driving devices like motors are used to draw out the flexible display, then the screen expansion function is achieved, but the space efficiency deteriorates
Solution Approach 1:
By removing the motor and its associated power supply, control circuits, and mounting structures, the patent extracts the bulky electric components from the device. The compact mechanical replacement occupies significantly less volume within the housing, improving space efficiency while maintaining the expansion capability.
3Device complexity
If a simple mechanical structure is used to draw out the flexible display, then the space efficiency is improved, but the control precision and reliability deteriorate
Solution Approach 1:
The spring is pre-loaded to store potential energy before activation. When the cylindrical housing rotates, this pre-stored energy is released to drive the cam and guide pin mechanism, ensuring reliable and consistent motion control without requiring complex active control systems.
Solution Approach 2:
The cylindrical cam's curved surface converts rotational motion into precise linear motion of the guide pin. The geometric relationship between the cylindrical cam profile and the guide pin ensures controlled, repeatable movement of the flexible display, providing reliability through pure geometry rather than electronic control.
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 solution enhances space efficiency and simplifies the screen expansion structure by enabling reliable and controlled movement of the flexible display without the use of motors, ensuring the competitiveness of the electronic device with an expandable screen.
Implementation Method 1
a pair of springs accommodated in the cylindrical housing and configured to elastically support the pair of cylindrical cams, respectively
Implementation Method 2
a pair of cylindrical cams penetrated by the shaft and accommodated in the cylindrical housing, wherein the pair of cylindrical cams are configured to be capable of performing a linear motion on the shaft
Implementation Method 3
a pair of guide pins coupled to the cylindrical housing and configured to correspond to a pair of guide grooves, respectively, which are provided in cylindrical surfaces of the pair of cylindrical cams, respectively
Data Source
Figure 1
Figure 2
Figure 3
AI summary
According to an embodiment of the disclosure, an electronic device may include a housing, a flexible display configured to be at least partially drawn out of an internal space of the housing, and a rotation module configured to move the flexible display, wherein the rotation module may include a shaft including one end and another end each coupled to a support member included in the electronic device, a cylindrical housing drivingly connected to the flexible display and configured to be capable of performing a rotational motion about the shaft, a pair of cylindrical cams penetrated by the shaft and accommodated in the cylindrical housing, wherein the pair of cylindrical cams are configured to be capable of performing a linear motion on the shaft and positioned to be symmetrical to each other with respect to a center of the shaft, a pair of guide pins coupled to the cylindrical housing and configured to correspond to a pair of guide grooves, respectively, which are provided in cylindrical surfaces of the pair of cylindrical cams, respectively, wherein the pair of guide grooves are symmetrical to each other with respect to the center of the shaft, and a pair of springs accommodated in the cylindrical housing and configured to elastically support the pair of cylindrical cams, respectively, wherein the pair of springs are symmetrical to each other with respect to the center of the shaft. Various other embodiments are possible.