Vehicle Intelligent Light Device Dynamic Illumination Control
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Solution Overview
Problem
Conventional bicycle light devices fail to adjust illumination levels appropriately to the surrounding environment, leading to inadequate or excessive lighting, and require high-capacity power sources due to unnecessary continuous operation.
Innovation Solution
An intelligent light device with a light-controlling unit comprising a micro control unit, pulse width modulation unit, differential amplifier, analog-to-digital converter, and buffering unit, which senses and adjusts illumination levels based on preset settings and environmental conditions, allowing for manual adjustment and efficient power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a switch controlled by vibration and photosensor is used to control LED illumination, then the light device can turn on or off based on surrounding illumination, but the illumination level cannot be adjusted to appropriate levels and the photosensor cannot sense illumination within a predefined area
Solution Approach 1:
The patent implements dynamic illumination adjustment by replacing the simple on/off switch with a micro control unit that continuously monitors ambient light levels through a photosensor and automatically adjusts LED brightness accordingly. The system dynamically adapts illumination intensity based on real-time environmental conditions, allowing the LED to operate at appropriate brightness levels without manual intervention.
Solution Approach 2:
The patent employs a feedback mechanism where the photosensor continuously detects ambient illumination levels and feeds this information to the micro control unit. The micro control unit processes this feedback signal and adjusts the LED drive current through PWM control to maintain optimal illumination levels. This closed-loop feedback system ensures the illumination always matches the surrounding environment appropriately.
2Illumination intensity
If the light device turns on continuously to ensure adequate illumination, then sufficient lighting is provided, but the power source requires high capacitance making it expensive and heavy
Solution Approach 1:
The system dynamically adjusts LED illumination based on real-time ambient light detection rather than operating continuously at fixed brightness. The micro control unit modulates LED power consumption by comparing photosensor readings against preset thresholds and adjusting drive current accordingly, enabling the light to operate only when and at the level needed, thus reducing overall power requirements and allowing use of smaller, lighter batteries.
Solution Approach 2:
The patent changes the operating parameters of the LED by implementing variable brightness control through PWM (pulse width modulation) based on ambient light conditions. Instead of fixed high-capacity power supply design, the system varies power consumption parameters dynamically, reducing average current draw and enabling the use of compact, lightweight power sources with lower capacitance ratings.
3Illumination intensity
If the light device turns on continuously to ensure adequate illumination, then sufficient lighting is provided, but power is wasted when illumination is not necessary
Solution Approach 1:
The system implements dynamic power management by continuously monitoring ambient illumination levels through the photosensor and adjusting LED operation accordingly. The micro control unit compares real-time light level data with preset thresholds and dynamically switches LED operation between on, off, or dimmed states, ensuring power is consumed only when and at the level actually needed, thereby eliminating wasteful continuous operation.
Solution Approach 2:
The patent employs a feedback-controlled power management system where the photosensor provides continuous environmental light level information to the micro control unit. This feedback enables intelligent decision-making about LED operation, turning the light off or reducing brightness when ambient illumination is sufficient, and activating or increasing brightness only when needed, thus optimizing energy consumption and preventing power wastage.
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
The intelligent light device provides optimal illumination levels, reducing the risk of accidents and power wastage while using a compact, lightweight power source, ensuring stable and efficient operation.
Implementation Method 1
the differential amplifier is used to sense a first illumination level of a surrounding area of the light projection region
Implementation Method 2
the analog-to-digital converter is used to convert the signal of the first illumination level from a continuous analog signal to a discrete digital signal
Implementation Method 3
A light projection region is defined by the light beam which is projected from the light-emitting unit and refracted through the condensing lens
Implementation Method 4
The LED is connected to a cadmium sulfide photoresistor
Data Source
AI summary
An intelligent light device for a vehicle includes a light body, a light-controlling unit, a light-emitting unit and a condensing lens. The light-controlling unit has a MCU and a PWM. The light-controlling unit is used to sense a first illumination level of a surrounding area of a light projection region. Wherein when the MCU receives a signal of the first illumination level, the MCU generates one command of a difference value between a preset illumination level and the first illumination level; and then, the MCU transmits one command to the PWM; thereafter, the PWM adjusts a second illumination level of the light-emitting unit according to one command from the MCU so as to achieve a third illumination level of the light projection region.