LED Driving System Fast Voltage-Adjusting Circuit
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Solution Overview
Problem
Existing light emitting diode driving systems generate pulse waves with high and low voltages at a speed that is not fast enough, leading to incorrect light driving signals due to incomplete discharge or recovery of output voltage.
Innovation Solution
A light emitting diode driving system with a fast voltage-adjusting circuit, comprising a control unit, output side switch unit, and light signal voltage generation circuit, which collaborates to clamp and process the output voltage to a predetermined value, ensuring accurate and rapid generation of light driving signals for two-pin point-controlled light emitting diode lamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the related art discharging circuit processes the discharging task with deducting equivalent capacitance, then the circuit structure is simple, but the voltage discharge speed is too slow to reach the predetermined voltage within the output switch conduction time
Solution Approach 1:
The patent segments the discharging circuit into two independent parts: a traditional discharging circuit and a newly added fast discharging circuit. This segmentation allows each circuit to perform specific functions - the traditional circuit handles general discharging while the fast discharging circuit with switch provides rapid voltage adjustment when needed, thereby increasing voltage discharge speed without requiring complete redesign of the entire circuit.
Solution Approach 2:
The patent introduces a controllable switch in the fast discharging circuit that dynamically adjusts the discharging path based on system needs. When the switch is closed, the fast discharging circuit activates to rapidly reduce voltage; when open, the traditional discharging circuit operates normally. This dynamic control enables the system to adapt discharge speed to operational requirements, solving the contradiction between speed and complexity.
2Reliability
If the output voltage is not discharged to the predetermined voltage in time, then the circuit operation is stable, but the light driving signal becomes incorrect due to incomplete voltage discharge
Solution Approach 1:
The fast discharging circuit is prepared in advance with the switch ready to close when voltage discharge is needed. This preliminary preparation allows the system to immediately activate the fast discharging path when the output switch turns on, ensuring the voltage reaches the predetermined level within the required time without compromising signal accuracy.
Solution Approach 2:
The control unit monitors the output voltage and controls the switch state based on whether the voltage has reached the predetermined value. This feedback mechanism ensures that the fast discharging circuit operates only when necessary, maintaining signal reliability while minimizing unnecessary switching operations that could cause instability.
3Productivity
If the voltage recovery is incomplete before the next cycle, then the circuit continues operating, but the light driving signal generation becomes incorrect
Solution Approach 1:
The fast discharging circuit enables continuous operation of the output switch by ensuring complete voltage discharge before each cycle begins. The switch remains closed during the entire discharge phase, maintaining continuous voltage control and preventing incomplete discharge that would lead to incorrect signal generation in subsequent cycles.
Data Source
AI summary
A light emitting diode driving system includes a control unit, an output side switch unit, the fast voltage-adjusting circuit and a light signal voltage generation circuit. When the control unit does not turn on the output side switch unit, the control unit controls the fast voltage-adjusting circuit to process an output voltage, and the light signal voltage generation circuit combines the fast voltage-adjusting circuit to clamp the output voltage to meet a predetermined value. When the output voltage is processed to meet the predetermined value, the control unit turns on the output side switch unit so the output voltage recovers and a light driving signal is generated. According to the light driving signal, a plurality of two-pin point-controlled light emitting diode lamps is operated in a lighting mode.