Power On-Off Circuit With Hardware Latching for Stable Startup
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Solution Overview
Problem
Existing electronic devices face challenges in ensuring stable power on/off states due to complex software systems failing to send effective lock signals promptly, leading to increased costs from adding microprocessors or dedicated control chips.
Innovation Solution
A power on/off control circuit utilizing semiconductor switching elements and holding circuits to maintain power states, combined with resistor voltage dividers for stable power management, without the need for additional microprocessors or dedicated control chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a microprocessor or programmable processor is added to ensure power on state locking, then the power on state can be reliably locked, but the device complexity and cost increase
Solution Approach 1:
The patent replaces the software-based control system (microprocessor/programmable processor) with a hardware-based semiconductor switching circuit that automatically locks the power on state through electrical connections and switching elements, eliminating the need for complex software control while ensuring reliable power on state locking
Solution Approach 2:
The patent uses simple, inexpensive semiconductor switching elements and resistors to create a power on/off control circuit that achieves reliable power state locking without requiring expensive microprocessors or dedicated control chips, significantly reducing overall device cost
2Reliability
If a dedicated power on/off control chip is used to ensure power state locking, then the power on state can be reliably locked, but the device cost increases
Solution Approach 1:
The patent divides the power control function into separate semiconductor switching elements (first and second switching elements) that work together in a circuit configuration, allowing the power on/off control functionality to be achieved through distributed simple components rather than a single expensive dedicated control chip
Solution Approach 2:
The patent creates a universal power on/off control circuit using standard semiconductor switching elements and resistors that can be applied to various electronic devices without requiring device-specific dedicated control chips, achieving both reliability and cost-effectiveness through a standardized approach
3Ease of manufacture
If the software control system is simplified to reduce cost, then the device cost decreases, but the power on state locking becomes unreliable
Solution Approach 1:
The patent replaces the software-based control mechanism with a hardware-based semiconductor switching circuit that provides automatic power on state locking through electrical connections, ensuring reliability while keeping the overall system simple and cost-effective without requiring complex software
Data Source
AI summary
A power on/off control circuit and an electronic device is provided, the circuit including: a switching element, a first semiconductor switching circuit including a first semiconductor switching element, a second semiconductor switching circuit including a second semiconductor switching element, and a holding circuit connected between a first terminal of the first semiconductor switching element and a second terminal of the second semiconductor switching element. When the switching element is closed, the first semiconductor switching element is turned on. When the first semiconductor switching element is turned on, the second semiconductor switching element is turned on, and a power on signal is output via the second terminal of the second semiconductor switching element. When the second semiconductor switching element is turned on, the holding circuit is operable to maintain the on state of the first semiconductor switching element. The control circuit can stably lock a started state.