Rollable Display Motor Speed Control for Heat-Aware Extension
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Solution Overview
Problem
Rollable electronic devices with flexible displays face heat management issues due to frequent motor driving, where the driving duration time significantly influences motor temperature, leading to reduced convenience and increased heat generation.
Innovation Solution
A method to control the driving speed of the motor based on its driving pattern, including the number of times driven, driving time, and direction, to adjust the motor's operation and reduce heat generation while maintaining user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor is frequently driven to change the flexible display state, then the display functionality is improved, but heat generation increases
Solution Approach 1:
The motor driving speed is dynamically adjusted based on the driving duration time. When the driving duration exceeds a threshold, the motor driving speed is reduced to lower heat generation. This dynamic adjustment allows the system to maintain display functionality while managing motor temperature, resolving the contradiction between adaptability and temperature control.
2Productivity
If the motor driving speed is increased to reduce driving duration, then productivity is improved, but heat generation increases
Solution Approach 1:
The system dynamically adjusts motor driving speed based on driving duration time. When driving duration is short, higher speed is used to maintain productivity. When driving duration exceeds a threshold, speed is reduced to control heat generation. This dynamic adjustment resolves the contradiction between productivity and temperature control.
Solution Approach 2:
The control method applies periodic adjustment of motor driving speed based on driving duration time. By monitoring whether the driving duration exceeds a threshold and adjusting speed accordingly, the system creates a periodic control pattern that balances productivity requirements with heat management, resolving the contradiction between fast operation and temperature control.
3Temperature
If the motor driving speed is decreased to reduce heat, then temperature control is improved, but driving duration increases
Solution Approach 1:
The motor driving speed is dynamically adjusted based on driving duration time. For short-duration operations, the motor runs at higher speed to complete the task quickly. For long-duration operations exceeding a threshold, the speed is reduced to control heat generation. This dynamic adjustment resolves the contradiction between temperature control and driving duration.
4Ease of operation
If the motor is driven frequently to maintain display functionality, then ease of operation is improved, but heat generation and system load increase
Solution Approach 1:
The system dynamically adjusts motor driving parameters based on driving duration time to maintain ease of operation while controlling heat generation. The processor monitors driving patterns and adjusts speed accordingly, allowing frequent state changes when necessary while managing thermal impact through speed modulation.
Data Source
AI summary
Disclosed is an electronic device comprising: a flexible display including a first state in which a display area has a first size and a second state in which the display area is extended in a first direction so as to have a second size that is larger than the first size; a motor driven in order to change the state of the flexible display; and at least one processor operatively connected to the flexible display and the motor, wherein one or more of the at least one processor is configured to determine, if an input for driving the motor is received, the driving speed of the motor based on the driving pattern of the motor and drive the motor based on the driving speed of the motor.