Rollable Display Charging Control for Heat-Limited Wireless Power
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Solution Overview
Problem
Conventional electronic devices with bar-type designs face challenges in efficient charging due to heat limitation control, which reduces charging efficiency and speed when the device temperature rises during charging.
Innovation Solution
An electronic device with a rollable display that adjusts its heat dissipation coefficient based on its extended or reduced state, incorporating a wireless charging IC and a processor that determines the charging current based on the device's state, ensuring efficient charging without entering heat limitation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If charging current is increased to improve charging speed, then charging efficiency is improved, but device temperature rises causing heat limitation control to activate
Solution Approach 1:
The patent applies dynamics by making the heat dissipation coefficient variable rather than constant. The processor dynamically adjusts the charging current based on the device's extended or reduced state, which changes the heat dissipation coefficient. This allows the system to optimize charging speed while adapting to temperature conditions created by different physical states of the device.
Solution Approach 2:
The patent changes the parameter of heat dissipation coefficient based on the device state (extended or reduced). By detecting the device state and adjusting the charging current accordingly, the system modifies operating parameters to prevent overheating while maintaining efficient charging. This parameter change approach allows the system to navigate the trade-off between charging speed and temperature control.
2Temperature
If charging current is reduced to lower device temperature, then heat limitation control is avoided, but charging efficiency is drastically reduced
Solution Approach 1:
The system dynamically adjusts charging current based on real-time device state detection. When the device is in the extended state with better heat dissipation, the processor allows higher charging current. When in the reduced state with poorer heat dissipation, the processor reduces charging current. This dynamic adjustment prevents unnecessary reduction of charging efficiency while maintaining temperature control.
Solution Approach 2:
The patent implements feedback by continuously monitoring the device state (extended or reduced) and using this information to adjust the charging current. The processor receives feedback about the physical state and modifies the charging parameters accordingly, creating a closed-loop control system that optimizes both temperature management and charging efficiency.
3Device complexity
If a constant heat dissipation coefficient is used for charging control, then control simplicity is maintained, but charging efficiency varies in different device states
Solution Approach 1:
The patent transitions from a static heat dissipation coefficient to a dynamic one that changes based on device state. The processor detects whether the device is in an extended or reduced state and adjusts the charging current accordingly. This dynamic approach improves charging efficiency across different states while adding manageable complexity through state detection and conditional control logic.
Data Source
AI summary
An electronic device includes: a first housing; a second housing movable with respect to the first housing; a rollable display partially fixed to the second housing and can be inserted into the first housing in a slide-in state or drawn out from the first housing in a slide-out state; a wireless charging IC inside the first housing or the second housing and can receive power from an outside; a battery inside the first housing or the second housing and can be charged with the power received from the outside via the wireless charging IC; and at least one processor configured to: based on the state of the second housing, determine a current to be received from the outside through the wireless charging IC or a current for charging the battery; and transmit a signal related to the current to the wireless charging IC.