Projector LED Light Assembly Heat Dissipation
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Solution Overview
Problem
High-intensity projectors rely on expensive and short-lived incandescent or HID bulbs, which produce excessive heat and contain hazardous materials, posing operational and safety risks.
Innovation Solution
A light assembly for projectors that incorporates an LED array with a heat sink and cooling fans, mechanically coupled to the projector's bulb mount, using thermal transfer pads and a lens to collimate light, reducing heat and replacing hazardous bulbs with safer, longer-lasting LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-wattage HID bulbs are used to produce high lumen output, then illumination intensity is improved, but heat generation increases and lifespan decreases
Solution Approach 1:
The patent replaces the traditional HID bulb (incandescent or high-intensity discharge) with an LED-based lighting assembly. LEDs are solid-state devices that convert electrical energy directly to light with significantly higher efficiency, producing the same or greater lumen output while generating minimal heat. This substitution eliminates the fundamental mechanism of heat generation associated with traditional bulb technologies.
Solution Approach 2:
The invention changes the operational parameters of the lighting system by using multiple low-wattage LEDs (e.g., five 14-watt LEDs totaling 70 watts) instead of a single high-wattage HID bulb (3,000-5,000 watts). This parameter change in power consumption directly results in reduced heat generation while maintaining high illumination intensity through the cumulative light output of multiple LED elements.
2Illumination intensity
If high-wattage HID bulbs are used to produce high lumen output, then illumination intensity is improved, but bulb lifespan decreases
Solution Approach 1:
The patent substitutes the short-lived HID bulb (6-16 weeks lifespan) with LED components that have inherently longer operational lifetimes. LEDs are solid-state devices with no filament or gas discharge components that fail, allowing them to operate for thousands of hours. The lighting assembly uses multiple LEDs that can be individually replaced if needed, further extending the overall system lifespan while maintaining high lumen output.
3Illumination intensity
If HID bulbs are used for high-intensity projection, then illumination intensity is improved, but safety risks increase due to explosion hazards
Solution Approach 1:
The patent replaces the explosion-prone HID bulb with LED components that are inherently safe and cannot explode. LEDs are solid-state devices with no pressurized gas chambers or fragile filaments that could rupture. The lighting assembly eliminates the explosion hazard entirely while maintaining high illumination intensity through the cumulative output of multiple LED elements arranged in a safe, contained configuration.
Solution Approach 2:
The invention uses multiple individual LED components (e.g., five separate 14-watt LEDs) instead of a single high-value HID bulb. If one LED fails, the others continue to operate, and the failed LED can be replaced individually at low cost. This approach eliminates the safety risk of a single high-wattage bulb while providing redundancy and continued light output even with partial failure.
4Temperature
If cooling fans and ventilation systems are added to manage heat from HID bulbs, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent replaces the complex mechanical cooling system (high-performance cooling fans and secondary roof-mounted ventilation fans) with a passive LED lighting assembly that generates minimal heat. LEDs operate at low temperatures and do not require active cooling mechanisms. The lighting assembly eliminates the need for multiple fans and ventilation systems, reducing device complexity while effectively managing temperature through the inherent low-heat generation of LED technology.
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 solution reduces operational costs, enhances safety by eliminating explosion hazards, and maintains high light output with the advent of advanced LED technologies, addressing the limitations of traditional bulbs.
Implementation Method 1
a Light Emitting Diode (LED) Array configured to generate light
Implementation Method 2
a heat sink configured to dissipate heat
Implementation Method 3
one or more cooling fans configured to generate airflow
Implementation Method 4
a lens configured to collimate light emitted from the LED Array
Implementation Method 5
a first thermal transfer pad configured to conduct heat
Data Source
AI summary
Disclosed is a light assembly configured to be installed in a movie projector. The light assembly includes an adaptor configured to mechanically couple with a bulb mount of the movie theatre projector. The light assembly further includes a female socket rigidly connected to the adaptor and a male socket configured to mate with the female socket. Yet further, the light assembly includes one or more cooling fans configured to generate airflow, a heat sink configured to dissipate heat, a first thermal transfer pad configured to conduct heat, a primary mounting plate, and a second thermal transfer pad. Moreover, the light assembly includes a Light Emitting Diode (LED) Array configured to generate light, wherein the LED Array is mounted on a board. Further, the light assembly includes a lens mounting plate, multiple lens mount standoffs, a lens configured to collimate light emitted from the LED Array, and a lens retainer.