Motor-Driven Rollable Display Housing for Smooth Sliding
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Solution Overview
Problem
Existing rollable electronic devices face challenges in achieving smooth sliding operations due to the interference of repulsive forces from the rollable display and manual slide modules, and lack efficient electrical connections and layout designs that hinder the effective use of driving force.
Innovation Solution
Incorporating a drive motor with a pinion gear and rack gear mechanism for automatic sliding, along with a flexible printed circuit board for efficient electrical connections, and optimizing the layout to minimize power consumption and weight while enhancing operational reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a manual slide module (spring hinge) is used for sliding operation, then the device can achieve semi-automatic sliding when pressed beyond a predetermined inflection point, but the manual sliding structure interferes with smooth sliding due to repulsive force from the rollable display and is difficult to design for uniform force distribution
Solution Approach 1:
The patent replaces the manual slide module (spring hinge) with a drive motor that directly drives the second housing to slide relative to the first housing. This substitution eliminates the mechanical interference and repulsive force issues inherent in spring-based manual sliding mechanisms, achieving both automation and smooth operation.
Solution Approach 2:
The patent removes the manual slide module (spring hinge) from the system entirely, extracting the problematic component that causes repulsive force interference. By eliminating this component and using only the drive motor for sliding operation, the system achieves smooth sliding without the complexity of coordinating multiple force sources.
2Power
If the drive motor is disposed in the first housing with electrical connection to the board in the second housing, then the driving force can be effectively utilized, but the electrical connection structure becomes complex and power consumption increases
Solution Approach 1:
The patent merges the drive motor and the board into the same housing (first housing), eliminating the need for complex electrical connections across housing boundaries. This consolidation reduces electrical connection complexity and associated power consumption while maintaining effective utilization of driving force through optimized component proximity.
3Weight of moving object
If the drive motor is disposed in the first housing, then the second housing can be made lighter for easier sliding, but the layout design of peripheral electronic components becomes constrained
Solution Approach 1:
The first housing serves multiple functions: it houses the drive motor, contains the board, and provides structural support for the entire device. This multi-functionality allows the second housing to be minimized in weight while the first housing accommodates all necessary electronic components and driving mechanisms, resolving the conflict between weight reduction and layout complexity.
4Extent of automation
If the pinion gear and rack gear are engaged for automatic sliding operation, then the sliding can be performed automatically without manual intervention, but the structural complexity increases
Solution Approach 1:
The patent replaces the pinion gear and rack gear mechanical transmission system with a direct-drive configuration where the drive motor directly drives the second housing. This substitution eliminates the complexity of engaged gearing structures while maintaining automatic sliding operation, achieving automation with reduced mechanical complexity.
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 solution enables reliable and efficient sliding operations with improved power management, reduced weight, and enhanced operational reliability by minimizing electrical connection complexity and optimizing the placement of components.
Implementation Method 1
a drive motor disposed in the first housing, electrically connected to the first printed circuit board, and configured to provide a driving force to drive the second housing
Implementation Method 2
a pinion gear disposed in the first housing and configured to transmit power based on the driving force of the drive motor, and a rack gear disposed in the second housing to be engaged with the pinion gear
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing slidably connected to the first housing, a rollable display disposed to be supported by the first housing and the second housing and having a display area contracted or expanded based on a slide-in state or a slide-out state of the second housing, a support member disposed on the rear surface of the rollable display to support at least a portion of the rollable display, a first printed circuit board disposed in the first housing, a second printed circuit board disposed in the second housing, a flexible printed circuit board configured to connect the first printed circuit board and the second printed circuit board and configured to be folded or unfolded based on the slide-in state or slide-out state of the second housing, a drive motor disposed in the first housing, electrically connected to the first printed circuit board and configured to provide a driving force to drive the second housing, a battery disposed in the first housing and configured to supply power to the drive motor, a pinion gear disposed in the first housing and configured to transmit power based on the driving force of the drive motor, and a rack gear disposed in the second housing to be engaged with the pinion gear.