Power Management Device for Touchable Control System
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Solution Overview
Problem
Conventional touchable control systems take a long time to restore from sleep mode to operating mode due to inefficient charging of external capacitors, resulting in delayed user interaction.
Innovation Solution
A power management device comprising a boost circuit, storage circuit, detection circuit, and loading circuit, where a change-over switch connects or disconnects the loading circuit based on a predetermined output voltage, allowing full current flow to the storage capacitor until it reaches the operating voltage, significantly reducing charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the loading circuit is electrically connected to the output terminal of the boost circuit during sleep mode restoration, then the loading circuit can consume output current, but the charging time of the external capacitor becomes much longer due to current division
Solution Approach 1:
The patent applies dynamics by making the connection state of the loading circuit changeable rather than fixed. The loading circuit is dynamically connected or disconnected based on the charging state of the external capacitor, as detected by the detection circuit. This dynamic adjustment allows the system to optimize between current consumption and charging speed at different operational stages.
Solution Approach 2:
The detection circuit performs preliminary detection of the external capacitor's charging state before determining whether to connect the loading circuit. This preliminary action allows the system to assess the capacitor's voltage level and make informed decisions about when to enable the loading circuit, ensuring optimal charging conditions are met before full operation begins.
2Ease of operation
If the external capacitor is charged to the operating voltage while receiving touch inputs, then the system can respond to user interactions, but the response time still feels slow or delayed to users
Solution Approach 1:
The detection circuit provides continuous feedback about the external capacitor's charging state to the control logic. This feedback mechanism allows the system to monitor the capacitor voltage in real-time and adjust the loading circuit connection accordingly, ensuring the system responds as quickly as possible while maintaining stable operation during touch input reception.
3Use of energy by stationary object
If the loading circuit consumes a part of the output current, then the external capacitor charges more slowly, but the loading circuit remains powered during charging
Solution Approach 1:
The patent applies partial action by enabling the loading circuit to consume current only partially during the charging process. Specifically, the loading circuit is disconnected during critical charging phases when full current is needed to rapidly charge the external capacitor, and is only enabled when the capacitor reaches sufficient voltage levels, thus balancing power supply needs with charging speed requirements.
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
This solution rapidly restores the touchable control system from sleep mode to operating mode, enhancing user convenience by significantly decreasing response time and preventing transistor damage from excessive charging.
Implementation Method 1
The boost circuit 21 has an output terminal 21t and generates an output voltage Vout
Implementation Method 2
The storage circuit 22 electrically connects to the output terminal 21t of the boost circuit 21 and stores the output voltage Vout
Data Source
AI summary
A power management device of a touchable control system includes a boost circuit, a storage circuit, a detection circuit and a loading circuit. The boost circuit has an output terminal and generates an output voltage. The storage circuit electrically connects to the output terminal of the boost circuit and stores the output voltage. The detection circuit electrically connects to the storage circuit so as to detect the output voltage. The loading circuit electrically connects or disconnects to the output terminal of the boost circuit according to a predetermined value of the output voltage.