LED Light Assembly for Movie Theatre Projectors
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Solution Overview
Problem
High-intensity projectors rely on expensive and short-lived Xenon-Plasma HID bulbs, which produce excessive heat, pose safety hazards due to hazardous materials, and require costly cooling systems and auxiliary air conditioning, necessitating a safer and more cost-effective alternative for high-lumen applications.
Innovation Solution
A light assembly system for projectors that includes an LED emitter with a heat dissipation mechanism, a lens for collimating light, and a standalone control system to interface with the projector's existing control system, utilizing adaptable components like heat sinks, cooling fans, and thermal pads to manage heat and power the LEDs efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If Xenon-Plasma HID bulbs are used to produce high-intensity light, then illumination intensity is improved, but heat generation increases and lifespan decreases
Solution Approach 1:
The patent replaces the Xenon-Plasma HID bulb (electrical discharge lamp) with an LED-based lighting system. LEDs convert electrical energy to light more efficiently, producing significantly less heat while maintaining high lumen output. This substitution of the light-generating mechanism directly resolves the contradiction between high illumination intensity and excessive heat generation.
Solution Approach 2:
The patent changes the operating parameters of the lighting system by using LEDs that operate at lower temperatures and lower power consumption compared to HID bulbs. The LED array can be controlled to operate at specific current levels, adjusting light output while maintaining efficient thermal characteristics, thus resolving the heat-intensity trade-off.
2Illumination intensity
If Xenon-Plasma HID bulbs are used to produce high-intensity light, then illumination intensity is improved, but device lifespan is reduced
Solution Approach 1:
The patent substitutes the short-lived HID bulb with a long-lived LED system. LEDs have no filament or gas discharge components that fail, allowing them to operate for tens of thousands of hours compared to the limited lifespan of HID bulbs. This substitution maintains high illumination intensity while dramatically extending the duration of operation.
3Power
If Xenon-Plasma HID bulbs are used, then high-wattage operation is achieved, but safety hazards increase due to hazardous materials
Solution Approach 1:
The patent replaces the HID bulb containing hazardous materials (mercury, xenon gas under high pressure) with solid-state LED components. LEDs contain no hazardous substances, eliminating the safety risks associated with bulb breakage, mercury exposure, and high-pressure gas explosions, while still delivering high power output through efficient electrical-to-optical conversion.
4Temperature
If cooling systems are added to manage heat from HID bulbs, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent eliminates the need for complex cooling systems by substituting the heat-generating HID bulb with thermally efficient LEDs. The LED assembly requires only passive heat sinking rather than active cooling mechanisms, dramatically simplifying the thermal management system while maintaining effective temperature control.
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 LED-based light assembly offers a longer lifespan, reduced operational costs, and safety improvements by eliminating hazardous materials, while enabling high-intensity illumination suitable for long-distance projection without the explosion risks associated with traditional bulbs.
Implementation Method 1
at least one LED directly or indirectly attached to the primary LED Emitter mounting plate
Implementation Method 2
a cooling assembly configured to dissipate heat from the primary LED Emitter mounting plate
Implementation Method 3
a lens configured to collimate light emitted from the at least one LED
Data Source
AI summary
In one aspect, a light assembly system configured to be installed in a movie theatre projector includes a light assembly, which includes an adaptor configured to mechanically couple to a bulb mount of the movie theatre projector, LEDs attached to a primary LED Emitter mounting plate, a cooling assembly configured to dissipate heat from the primary LED Emitter mounting plate and a lens configured to collimate light emitted from the LEDs. The light assembly system also includes a light assembly control system, separate from an existing control system of the movie theatre projector, that is configured to control operation of the light assembly.