Expandable Display Frame Structure to Prevent Bulging
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Solution Overview
Problem
Electronic devices often face challenges in balancing portability with display size, as limited real estate restricts available display area.
Innovation Solution
An expandable display mechanism is integrated into the device, allowing the display to transition between retracted and expanded states by rolling around an axis, supported by a frame with rigid and flexible portions, and tensioning structures to maintain smooth expansion and retraction without bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display is made expandable to increase viewable area, then the display area increases, but the device structure becomes more complex
Solution Approach 1:
The frame is divided into rigid and flexible portions, with the flexible portion segmented into parallel strips that can independently roll and flex. This segmentation allows the display to expand and retract while distributing mechanical stress across multiple discrete elements, managing structural complexity through modular design
Solution Approach 2:
The retractable display portion is nested within the housing when retracted, with the flexible frame strips rolling around an axis to conceal the display behind the exposed portion. This nesting approach allows the display to be compact when not in use while providing full expansion capability when needed
2Ease of operation
If the display expands and contracts frequently, then usability is enhanced, but reliability decreases due to potential display damage
Solution Approach 1:
The flexible frame strips are pre-configured to bend and roll in controlled manner, cushioning the mechanical stress that would otherwise damage the display during expansion and retraction. The guide rails and tensioning structures are also pre-positioned to prevent bulging and ensure smooth transitions, protecting the display from damage through advance mechanical preparation
Solution Approach 2:
The flexible frame strips act as flexible structural elements that can bend and roll without damaging the display. These thin, flexible metal strips provide the necessary mechanical compliance to allow frequent expansion and retraction while maintaining structural support for the display panel
3Manufacturing precision
If tensioning structures are added to prevent display bulging, then display quality is maintained, but device complexity increases
Solution Approach 1:
The tensioning structures are merged with the flexible frame strips and guide rail system, combining multiple functions into integrated mechanical elements. The tensioning bars work in conjunction with the rolling mechanism and guide rails to maintain display flatness without requiring separate, independent tensioning systems, thereby reducing overall complexity while achieving the desired precision
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 flexible display that can increase viewable area by up to 100% while maintaining structural integrity and preventing display bulging, offering enhanced usability and convenience.
Implementation Method 1
The parallel strips of metal may roll around an axis and may slide along guide rails as the display transitions between expanded and retracted states
Implementation Method 2
One or more tensioning structures may be coupled to one of the strips of metal and may apply tension to the display
Implementation Method 3
A slider mechanism may include first and second rack-and-gear mechanisms coupled by a common drive shaft to ensure that top and bottom edges of the display are moved in unison during expansion and retraction
Data Source
AI summary
An electronic device may have a housing, an expandable display mounted to the housing, and a frame for supporting the expandable display. The housing, display, and frame may be operable in expanded and retracted states. In the retracted state, an exposed portion of the display is viewable on the outside of the device, while a retractable portion of the display is enclosed within the housing and hidden behind the exposed portion of the display. As the device transitions from the retracted state to the expanded state, the retractable portion of the display may roll around an axis onto the front of the device to increase the size of the viewable display area. The frame may have a rigid portion that is mostly solid metal supporting the exposed portion of the display and a flexible portion formed from parallel strips of metal supporting the retractable portion of the display.