Starter Circuit Digital Control for Instant Smart Entry Activation
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Solution Overview
Problem
Existing starter circuits for smart entry systems, such as vehicle doors, face challenges with increased starting time and power consumption due to the use of capacitors for instantaneous voltage supply, which are not efficient in detecting user approach and unlocking doors quickly, especially in rainy conditions.
Innovation Solution
A starter circuit design incorporating a start detection circuit, digital OR circuit, power supply circuit, and digital control circuit that uses a retention signal to maintain power supply operation and a reset signal to reset the detection circuit, eliminating the need for capacitors and enabling rapid startup with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a capacitor is used for instantaneous voltage supply in the starter circuit, then the power supply circuit can be activated, but the starting time increases and power consumption increases
Solution Approach 1:
The patent removes the capacitor component from the starter circuit entirely. Instead of using a capacitor-based instantaneous voltage supply mechanism, the invention employs a direct digital control approach where the control circuit detects the start condition and immediately activates the power supply circuit through digital logic signals, eliminating the charging time requirement of capacitors.
Solution Approach 2:
The patent replaces the analog capacitor-based voltage supply mechanism with a digital control system. The digital control circuit uses logic signals and digital processing to manage power supply activation, substituting the physical charging process of capacitors with electronic digital control signals that can be generated instantaneously.
2Reliability
If a capacitor is used for instantaneous voltage supply in the starter circuit, then the power supply circuit can be activated, but power consumption increases
Solution Approach 1:
The patent removes the capacitor component from the starter circuit entirely. Instead of using a capacitor-based instantaneous voltage supply mechanism, the invention employs a direct digital control approach where the control circuit detects the start condition and immediately activates the power supply circuit through digital logic signals, eliminating the charging time requirement of capacitors.
Solution Approach 2:
The digital control circuit automatically detects the start condition (such as door handle operation or button press) and self-activates the power supply circuit without requiring external capacitor charging. The system uses its own internal resources and logic to manage the activation process efficiently.
3Device complexity
If a simple digital circuit is used for smart entry system, then the circuit complexity is reduced, but the starting speed may be insufficient for instantaneous door unlocking
Solution Approach 1:
The patent implements a dynamic control mechanism where the digital control circuit can rapidly transition between sleep mode and active operation based on detected start conditions. The circuit maintains simplicity in structure but achieves high speed through dynamic signal processing and immediate response logic that activates power supply and control functions instantly when triggered.
Solution Approach 2:
The digital control circuit is designed to be in a ready state with detection functions continuously monitoring for start conditions. When a trigger event occurs (such as door handle operation), the circuit immediately executes the activation sequence without delay, having pre-positioned the necessary control logic and signal paths for instantaneous response.
Data Source
AI summary
A starter circuit includes a start detection circuit for detecting a change of an input signal and outputting a start digital signal, a digital OR circuit for outputting a determination digital signal based on the start digital signal, a power supply circuit being activated based on the determination digital signal, and a digital control circuit being operated based on a power from the power supply circuit. The digital control circuit inputs a retention signal to the digital OR circuit for maintaining an operation of the power supply circuit and a reset signal to the start detection circuit for resetting the start detection circuit.