Cordless LED Headlight Wireless Power and Shadow Control
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Solution Overview
Problem
Current battery-powered LED headlight systems for medical professionals are cumbersome due to the discomfort of wearing a battery pack and the management issues associated with power cords, which can interfere with movement and provide inadequate shadow-free illumination.
Innovation Solution
A cordless LED headlight system with a removable, rechargeable battery pod connected to a headlight via a mechanical or electrical switch, allowing for wireless operation and adjustable mounting to minimize shadows and enhance user comfort, using RF, IR, or motion sensing controls for power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a power cord is used to connect the battery pack to the headlight, then the headlight can receive continuous electrical energy, but the power cord interferes with movement and requires special care to avoid catching on objects
Solution Approach 1:
The patent removes the power cord from the system by using a wireless power transmission mechanism. The headlight assembly receives power wirelessly through electromagnetic induction, eliminating the physical cord that causes mobility restrictions and safety hazards while maintaining continuous operation capability.
Solution Approach 2:
The mechanical connection system (power cord and connector) is replaced with an electromagnetic field-based wireless power transmission system. This substitution eliminates the physical constraints imposed by the cord while providing continuous power delivery to the headlight.
2Ease of operation
If a battery pack is mounted on the body to power the headlight, then the headlight can operate wirelessly, but the battery pack is uncomfortable to wear and requires management of power cords
Solution Approach 1:
The patent combines the power transmission function into the headlight assembly itself by integrating a receiving coil and power management circuitry. This merging eliminates the need for a separate battery pack worn on the body, reducing device complexity and improving comfort while maintaining wireless operation.
3Illumination intensity
If the headlight is positioned close to the user's line of sight, then the user can see the illuminated area clearly, but shadows are cast by the close proximity of the light source
Solution Approach 1:
The patent addresses shadow formation by adjusting the vertical positioning and angular orientation of the headlight assembly. By changing the spatial dimension of light delivery (positioning the light source above and in front of the user rather than directly in the line of sight), the system maintains clear visibility while minimizing shadow casting on the operating field.
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 cordless system provides reliable, shadow-free illumination without the burden of power cords, enhancing user comfort and operational efficiency by allowing for easy recharging and continuous use through a smart charging cradle.
Implementation Method 1
A battery (e.g., lithium-ion) placed in a battery pod connected to a mounted headlight (e.g., LED)
Implementation Method 2
a mounted headlight (e.g., LED)
Data Source
AI summary
A wireless headlight assembly for attachment to an eyewear frame is disclosed. The wireless headlight assembly comprises a battery pod containing a battery connected to an electronic circuit element, which controls the application of power from the battery to an attached headlight assembly containing a headlight, wherein control of the application of power to the headlight assembly is determined, in part, based on the stability of the headlight assembly.