Rollable Display Gear Assembly for Compact Variable Display Area
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Solution Overview
Problem
Electronic devices face a trade-off between compactness and the need for larger displays, particularly for multimedia services, as integrating multiple functions often requires a compromise in size.
Innovation Solution
A rollable electronic device design featuring a gear assembly and motor structure that allows a display to unfold by sliding a first housing relative to a second housing, with a motor disposed on the second housing and a gear assembly connecting to a rack gear on the first housing, enabling increased display area without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a larger display is integrated into the electronic device to satisfy multimedia service requirements, then the display area is improved, but the device size increases and compactness deteriorates
Solution Approach 1:
The display transitions from a static fixed size to a dynamic variable size through the sliding mechanism. The first housing can slide relative to the second housing to extend or retract the display area, allowing the device to adapt its display size based on usage needs while maintaining a compact form when retracted
Solution Approach 2:
The first housing containing the display is nested within or alongside the second housing in a telescopic arrangement. When not in use, the display portion is retracted into the second housing, allowing a large display area to be contained within a compact device volume, similar to nested dolls
2Adaptability or versatility
If a sliding mechanism is added to enable display extension, then the display area becomes variable and improves, but the device complexity increases
Solution Approach 1:
The complex mechanical sliding mechanism is replaced or assisted by a motor structure that generates driving force through electromagnetic fields. This substitution reduces the complexity of pure mechanical linkages while achieving the same functional outcome of extending and retracting the display
Solution Approach 2:
The motor structure serves multiple functions: it generates driving force for the sliding mechanism, controls the extension and retraction of the display, and can be integrated with the gear assembly to provide precise positional control. This multi-functionality reduces the need for separate control mechanisms
3Ease of operation
If a motor structure and gear assembly are integrated to control the sliding mechanism, then the display extension control is improved, but the device size and complexity increase
Solution Approach 1:
The motor structure and gear assembly are merged into an integrated unit where the motor directly drives the gear mechanism that controls the sliding. This consolidation reduces the number of separate components and simplifies the internal structure while maintaining ease of operation through unified 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
The solution provides a mechanism to expand the display area while maintaining device compactness, enhancing user experience for multimedia services without compromising portability.
Implementation Method 1
a motor structure configured to generate a driving force for the sliding of the first housing
Implementation Method 2
a gear assembly including a first gear connected to the motor structure, a rack gear connected to the first housing and configured to slide along with the first housing
Implementation Method 3
a gear assembly including a first gear connected to the motor structure, a rack gear connected to the first housing and configured to slide along with the first housing, a second gear configured to mesh with the rack gear
Data Source
AI summary
An electronic device may include a first housing configured to slide with respect to the second housing, a second housing receiving at least a portion of the first housing, a display configured to be unfolded based on sliding of the first housing, a motor structure configured to generate a driving force for the sliding of the first housing, the motor structure disposed on the second housing, and a gear assembly including a first gear connected to the motor structure, a rack gear connected to the first housing and configured to slide along with the first housing, a second gear configured to mesh with the rack gear, and a third gear connected to the second gear and configured to rotate based on rotation of the first gear.