Rollable Display Alarm Timing via Preliminary Deployment
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Solution Overview
Problem
Rollable display devices face challenges in displaying alarms on time due to the time required to draw out the display, leading to delayed alarm outputs.
Innovation Solution
A display device with a controller that draws out the display before a predetermined alarm time, adjusts the draw-out length based on alarm settings, and outputs alarms with varying content and brightness, allowing for immediate alarm display at the set time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display is drawn out at the alarm time, then the alarm can be displayed, but the display structure becomes complex and space-consuming
Solution Approach 1:
The controller draws out the display before the predetermined alarm time rather than at the alarm time itself. This preliminary action ensures the display is ready for alarm content while avoiding the need for complex mechanisms to rapidly deploy the display at the last moment, thus maintaining reliability while simplifying the overall structure.
2Reliability
If the display is kept drawn out for alarm readiness, then alarm can be displayed immediately, but power consumption increases
Solution Approach 1:
The display is drawn out only before the alarm time and then drawn back in, rather than remaining continuously deployed. This temporary preliminary deployment ensures the display is ready for alarm while minimizing power consumption by returning the display to its retracted state after the alarm period.
Solution Approach 2:
The display undergoes periodic deployment and retraction cycles - drawn out before alarm time, displayed during alarm, then drawn back in. This periodic action pattern optimizes power consumption by keeping the display in low-power retracted state most of the time while ensuring it is available when needed.
3Reliability
If the display is drawn out in advance before alarm time, then alarm can be displayed on time, but the alarm output time is delayed
Solution Approach 1:
The controller draws out the display before the predetermined alarm time to ensure the display is ready and available for immediate alarm content presentation. By performing this action in advance, the system guarantees alarm display availability while the controller manages the timing to minimize any perceived delay in alarm output.
4Illumination intensity
If the display area is increased for better alarm visibility, then alarm content is more visible, but the housing space required increases
Solution Approach 1:
The display area is made dynamic through the roller mechanism, allowing the display to be drawn out to a larger area when alarm visibility is needed, and retracted to a smaller area when not in use. This dynamic adjustment enables the housing to accommodate a larger display capability without permanently requiring the increased space that a fixed large display would demand.
Data Source
AI summary
Provided is a display device in which a display completes preparation for outputting an alarm before an alarm output time. The display device comprises a housing, a display, a roller accommodated in the housing to rotate to wind or unwind the display, and a controller configured to control the roller such that the display is drawn out of the housing before a predetermined time of a set alarm time and to output an alarm at the alarm time.