Flexible Display Motor Control for OCP and SMPL Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of flexible displays in electronic devices, such as smartphones, poses challenges in managing power consumption during slide-in or slide-out operations, which can lead to overcurrent protection (OCP) states, sudden momentary power loss (SMPL) states, and heat generation, potentially damaging the device or causing system failures.
Innovation Solution
An electronic device with a flexible display and a method for controlling the driving motor to adjust its speed based on the device's state or use scenario, reducing the likelihood of OCP, SMPL, and heat generation by identifying battery current, voltage, consumption current, battery level, and temperature through sensors and processing this information to control motor speed or discontinue motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If large power is supplied to the motor for smooth slide-in or slide-out operation, then the sliding speed and user experience are improved, but the risk of overcurrent protection (OCP) state, sudden momentary power loss (SMPL) state, and heat generation increases
Solution Approach 1:
The motor driving speed is dynamically adjusted based on real-time detection of device state (temperature, battery level, current consumption). The processor controls the motor to operate at different speeds depending on whether the device is in a high-risk or low-risk state, optimizing both sliding performance and system safety
Solution Approach 2:
The system implements feedback control by continuously monitoring device state parameters (temperature, battery level, current) and using this information to adjust motor driving speed. Sensors detect the current state and feed this information back to the processor, which then adjusts the motor control accordingly to prevent OCP and SMPL states
2Reliability
If motor speed is reduced to prevent OCP and SMPL states, then system reliability is improved, but the sliding operation becomes slower and less user-friendly
Solution Approach 1:
The motor driving speed is dynamically adjusted based on real-time detection of device state (temperature, battery level, current consumption). The processor controls the motor to operate at different speeds depending on whether the device is in a high-risk or low-risk state, optimizing both sliding performance and system safety
Solution Approach 2:
The system periodically monitors device state parameters and adjusts motor speed in discrete control steps. The processor determines at specific intervals whether to increase or decrease motor speed based on current device conditions, creating a periodic control pattern that balances reliability and efficiency
3Volume of moving object
If slide-in or slide-out operation is performed in low-temperature and low-voltage state, then the device structure remains compact, but the motor thrust decreases and voltage drop increases, raising the probability of SMPL state
Solution Approach 1:
The system performs preliminary detection of device state (temperature, battery level, voltage) before initiating motor operation. When adverse conditions are detected (low temperature, low voltage, low battery level), the processor takes preventive action by controlling the motor to operate at reduced speed or preventing operation entirely, thereby avoiding SMPL states before they occur
Solution Approach 2:
The system applies preliminary anti-action by detecting adverse operating conditions and counteracting their harmful effects before they can cause damage. When low-temperature or low-voltage conditions are detected, the processor implements control measures (reducing motor speed, limiting current) to prevent the motor thrust decrease and voltage drop from leading to SMPL states
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 effectively manages power in electronic devices with flexible displays, reducing the occurrence of OCP, SMPL, and heat generation, thereby enhancing the device's reliability and extending its operational lifespan.
Implementation Method 1
a motor configured to rotate the gear
Implementation Method 2
identifying battery current, voltage, consumption current, battery level, and temperature through sensors
Data Source
AI summary
An electronic device may include a first housing, a second housing configured to accommodate at least a part of the first housing and guide sliding movement of the first housing, a flexible display including a first display area coupled to the first housing and a second display area extending from the first display area, a gear disposed inside the second housing and configured to move the flexible display, a motor configured to rotate the gear, at least one sensor, and at least one processor. The at least one processor may be configured to identify a state of the electronic device including at least one of a battery current, a battery voltage, an internal consumption current, a battery level, or an electronic device temperature, based on information sensed through the at least one sensor, and control a speed of the motor or discontinue driving of the motor based on the state of the electronic device.