Dual-Drum Rollable Display Layout for Large-Screen Power Savings
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Solution Overview
Problem
Rollable displays face challenges with increased size and weight, necessitating larger drums and external power sources, leading to installation restrictions and unnecessary power consumption.
Innovation Solution
A display apparatus with a dual-drum system, including a first and second roller, supported by links and driven by motors, allows for flexible accommodation and exposure of display regions, reducing weight and power consumption through balanced weight distribution and motor usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the size of the rollable display is increased, then the display area is improved, but the size and weight of the drum accommodating the display must be increased, which restricts installation and movement
Solution Approach 1:
The display is divided into multiple segments that can be independently rolled around separate drums. Instead of using a single large drum to accommodate the entire display, the display panel is segmented into sections that can be stored in smaller, more manageable drum units, thereby reducing the weight and size constraints of individual drums while maintaining a large overall display area.
2Area of moving object
If the size of the display becomes large, then the display area is improved, but an external power source is necessary, leading to unnecessary power consumption
Solution Approach 1:
The display system implements periodic action by enabling the display to be rolled up and stored in the drum when not in use, thereby eliminating power consumption during non-operational periods. The display is only powered and unrolled when needed, creating an on-demand operation pattern that significantly reduces unnecessary power consumption compared to continuously powered large displays.
3Area of moving object
If the size of the display becomes large, then the display area is improved, but a power source having a long lifespan is required
Solution Approach 1:
By implementing periodic operation where the display is only activated when needed and stored when not in use, the operational hours of the power source are significantly reduced. This on-demand usage pattern extends the lifespan of the power source by minimizing the total time it needs to operate, thereby reducing the requirement for an extremely long-lasting power source.
4Device complexity
If a single drum structure is used to accommodate the display, then the structure is simple, but the weight and installation restrictions increase
Solution Approach 1:
The single drum structure is segmented into multiple smaller drum units, each capable of independently accommodating a portion of the display. This segmentation reduces the weight of individual drums, making installation and movement easier, while the overall system maintains the necessary complexity to support a large display area through coordinated operation of multiple drums.
Data Source
AI summary
A display apparatus includes a display including an upper region, a lower region, and an intermediate region; a first roller around which the upper region of the display is to be rolled; a second roller around which the lower region of the display is to be rolled; a first drum rotatably supporting the first roller; a second drum rotatably supporting the second roller; a main body disposed between the first drum and the second drum in which the intermediate region is disposed on a front surface of the main body; a first link connecting a left end of the first drum and a right end of the second drum and is rotatably connected to the main body; a second link connecting a right end of the first drum and a left end of the second drum and is rotatably connected to the main body; and a driver configured to rotate the first link and the second link in opposite directions, and the first drum includes first roller grooves to which the first roller is rotatably coupled, and the second drum includes second roller grooves to which the second roller is rotatably coupled.