Work Light High LED Density Heat Sink Removal
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Solution Overview
Problem
Existing work lights struggle with maintaining consistent brightness levels over extended operational periods due to heat generation, often requiring brightness reduction to manage heat, and lack efficient designs for portability and ease of use.
Innovation Solution
A battery-powered work light with a high LED density per square inch, lacking a heat sink, and featuring a pivotable and rotatable light head, along with a user interface for mode switching, to maintain brightness and facilitate easy handling and mounting options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink is added to manage heat generation, then temperature control is improved, but device complexity and weight increase
Solution Approach 1:
The patent removes the heat sink component entirely from the light head assembly, extracting the thermal management function to the battery pack instead. This eliminates the need for complex heat dissipation structures in the light head while still managing heat effectively through the battery's thermal capacity and design.
Solution Approach 2:
The battery pack serves as an intermediary thermal management system, absorbing heat generated by the high-density LED array in the light head and dissipating it over time. This mediator approach allows the light head to maintain simple construction while the battery handles thermal regulation passively.
2Illumination intensity
If LED density is increased to improve brightness, then illumination intensity is improved, but heat generation increases
Solution Approach 1:
The patent changes the density parameter of LEDs from conventional low-density arrangements to high-density configurations (at least 1.5 LEDs per square inch). This parameter change increases illumination intensity while the thermal management system adapts to handle the resulting heat generation through the battery's thermal absorption capacity.
3Adaptability or versatility
If the light head is made pivotable and rotatable for versatility, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent introduces dynamic movement capabilities to the light head through pivot and rotate functions, allowing it to adapt to various mounting positions and orientations. These dynamic features enable the light head to be positioned optimally for different work areas while maintaining a relatively simple mechanical implementation through hinge and rotation joint mechanisms.
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 design ensures consistent brightness throughout its operational life without throttling, while being compact and easy to transport, with enhanced LED efficiency reducing heat generation and maintaining brightness levels within 5% of the rated level.
Implementation Method 1
a plurality of light emitting diodes (LEDs) supported on the light panel
Data Source
AI summary
A work light including a body and a light head pivotally coupled to the body about a pivot axis. The body includes a user interface and a battery receptacle, the battery receptacle configured to receive a battery. The light head includes a housing, a light panel positioned within the housing and configured to be operated by the user interface, and a plurality of light emitting diodes (LEDs) supported on the light panel. The light head does not include a heat sink and has at least 1.5 LEDs per square inch.