Smart Flashlight Gyro Sensor Automatic Brightness Control

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Solution Overview

Problem

Existing flashlights lack automatic control for brightness and switching, which can lead to continuous illumination and increased temperature, potentially causing safety issues like smoking or fires.

Innovation Solution

A smart flashlight equipped with a PCB control board, gyro sensor, and acceleration sensor that automatically adjusts the brightness level and/or switching status of the light head component based on detected movement and position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the flashlight is manually switched on and off by users, then the user has full control over the lighting, but the flashlight may remain on continuously causing temperature increase and safety hazards

Engineering Contradiction:
ImprovesafetyVSAvoidmanual control
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The flashlight automatically detects its own movement status through sensors and adjusts its lighting state without user intervention. The control system monitors acceleration and swing data to determine when the flashlight is stationary or being waved, automatically switching between lighting modes to prevent overheating while maintaining user convenience.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The flashlight incorporates sensors that continuously monitor movement parameters and feed this information back to the control system. Based on the feedback about whether the flashlight is stationary or being waved, the system automatically adjusts the lighting state, creating a closed-loop control system that prevents continuous illumination and associated safety hazards.

Inventive Principle:
Principle #23Feedback

2Reliability

If the flashlight automatically adjusts brightness and switching status, then safety risks are minimized, but the device complexity increases due to additional sensors and control systems

Engineering Contradiction:
ImprovesafetyVSAvoidcontrol system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The sensor system serves multiple functions: it detects both the waving motion for hands-free control and the stationary state for safety shutdown. By making the control system multi-functional, the patent avoids adding separate sensors solely for safety purposes, thereby limiting the increase in device complexity while achieving automatic safety protection.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the safety detection function with the existing movement detection function into a single integrated control system. The same sensors and control circuitry that enable hands-free operation also provide automatic safety shutdown, merging multiple functions into one system rather than adding separate complexity for safety alone.

Inventive Principle:
Principle #5Merging (Combining)

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

Prevents the light from focusing on the same spot for a long time, minimizes the risks associated with high temperature, and prolongs the service life of the flashlight by enabling smart operation.

Implementation Method 1

a gyro sensor for detecting a swing amplitude and position of the flashlight

Methodology Applied
Scientific EffectGyroscopic effect: Gyroscope

Implementation Method 2

an acceleration sensor for detecting a height position and moving status of the flashlight

Methodology Applied
Scientific EffectAcceleration detection: Accelerometer

Implementation Method 3

the LED lamp panel is arranged in the head side shell

Methodology Applied
Scientific EffectLight-emitting diode effect: Light Emitting Diode

Data Source

PatentUS12305842B1Smart flashlight
Publication Date: 2025.05.20 DONG GUAN TECHNOMATE METAL WARE MANUFACTORY LTD
  • US12305842B1 patent drawing
  • US12305842B1 patent drawing
  • US12305842B1 patent drawing

AI summary

The utility model relates to the technical field of flashlights, in particular to a smart flashlight. The smart flashlight comprises a body component, a light head component, a light tail component and a battery component, and further comprises a PCB control board, and the PCB control board is provided with a gyro sensor and an acceleration sensor, enabling the PCB control board to automatically control a light intensity or power-off stop status of the flashlight based on detection information fed back by the gyro sensor and the acceleration sensor, so as to achieve smart operation.