Dual-Input Voltage Output Circuit for Multi-Mode E-Cigarette Lighting
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Solution Overview
Problem
Electronic cigarettes typically offer only a single method for lighting, lacking variety and user interaction.
Innovation Solution
A voltage output circuit incorporating a control chip and a buck switch chip, which responds to suction detection and touch signals to provide pulse width modulation, allowing for multiple lighting methods and enhanced user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a prior art voltage output circuit uses a single switch connected between the anode of the light emitting element and the positive terminal of the power supply, then the circuit structure is simple, but the light emitting element is exposed to high voltage during the off-state of the switch, causing high power consumption and reduced lifespan
Solution Approach 1:
The patent divides the single switch into two separate switches: a first switch connected between the anode and positive terminal, and a second switch connected between the cathode and negative terminal. This segmentation allows each switch to be controlled independently, enabling the light emitting element to be completely disconnected from the power supply during idle periods, thereby reducing power consumption and extending lifespan while maintaining structural simplicity.
Solution Approach 2:
The patent introduces a control unit as an intermediary that independently controls the on/off states of both switches. This control unit acts as a mediator to manage power delivery to the light emitting element, ensuring that both switches are properly coordinated to achieve complete power disconnection during idle periods, thus solving the reliability issue without significantly increasing circuit complexity.
2Ease of manufacture
If a prior art voltage output circuit uses a single switch configuration, then the circuit is easy to manufacture, but it cannot achieve complete power off state, resulting in continuous power consumption
Solution Approach 1:
By segmenting the single switch control into two independent switches with separate control signals, the circuit achieves complete power disconnection capability. The first switch disconnects the anode side while the second switch disconnects the cathode side, ensuring the light emitting element receives absolutely no power during idle periods, thereby eliminating continuous power consumption while keeping the manufacturing process relatively simple.
Solution Approach 2:
The patent implements dynamic control of the two switches based on operational states. The control unit dynamically adjusts the on/off states of both switches according to whether the system is in operation or idle mode, enabling the circuit to transition between power delivery and complete power disconnection states, thus optimizing energy consumption while maintaining ease of manufacture.
3Device complexity
If a prior art voltage output circuit uses a single switch between anode and positive terminal, then the control logic is simple, but the light emitting element remains connected to power supply, causing high standby power consumption
Solution Approach 1:
The patent segments the power connection into two independent paths controlled by separate switches. During standby mode, both switches can be turned off independently, completely disconnecting the light emitting element from the power supply on both sides. This segmentation enables true standby mode with zero power consumption while keeping control logic manageable through independent switch control signals.
Solution Approach 2:
The control unit implements feedback control by monitoring the operational state and adjusting the switch states accordingly. When the system enters standby mode, the control unit receives feedback and automatically turns off both switches to achieve complete power disconnection, thereby eliminating standby power consumption while maintaining relatively simple control logic through automated state management.
Data Source
Figure 1A
Figure 1B~1C
Figure 2A
AI summary
A voltage output circuit (100) and an electronic cigarette. The voltage output circuit (100) comprises: a control chip (U6) comprising a first control signal input end (20), a second control signal input end (21), and a modulated signal output end (23), where the first control signal input end (20) is electrically connected to a first control signal output end (24) by means of a suction detection element (J3), the second control signal input end (21) is connected to a second control signal output end (37) of a touch sensing chip (U8), and a touch input pin (25) of the touch sensing chip (U8) is connected to a touch panel; and a step-down switch chip (U2) comprising a first channel end (26), a first control end (27), and a second channel end (28), where the first channel end (26) of the step-down switch chip (U2) receives a system supply voltage (VCC_BAT), the first control end (27) of the step-down switch chip (U2) is connected to the modulated signal output end (23) of the control chip (U6), and when the first control signal input end (20) and/or the second control signal input end (21) receives active level, the control chip (U6) controls the second channel end (28) to output a driving voltage. The voltage output circuit (100) solves the problem in the electronic cigarette of single light-up mode.