Liquid Lens Projector Module Thermal Management
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Solution Overview
Problem
Current LCD projector light valve modules face challenges with high light intensity requirements, material durability, dust accumulation, and inefficient heat dissipation, leading to issues with lighting efficiency, imaging quality, and thermal stability.
Innovation Solution
A projector light valve module incorporating a liquid lens system with transparent cooling liquid-filled cavities, where the liquid lens integrates with incident and emergent lenses to refract light and facilitate heat dissipation, eliminating air gaps and improving material thickness distribution and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If glass aspheric or free-form lenses are used for the incident lens, then lighting efficiency and uniformity are improved, but cost increases and film peeling occurs
Solution Approach 1:
The patent changes the material parameter from glass to plastic for the incident lens, and introduces a liquid cooling layer to compensate for thermal effects, thereby reducing manufacturing cost while maintaining lighting efficiency
Solution Approach 2:
The patent uses a composite structure combining plastic lens material with liquid cooling medium, creating a multi-functional component that provides both optical function and heat dissipation
2Ease of manufacture
If plastic lens is used for the incident lens, then manufacturing cost is reduced, but durability decreases and local softening or burning occurs
Solution Approach 1:
The patent introduces a liquid cooling layer that contacts the plastic lens, using fluid circulation to remove heat and prevent thermal degradation, thereby improving durability while maintaining cost advantages
Solution Approach 2:
The patent changes the thermal management parameter by introducing active liquid cooling, which transforms the thermal environment of the plastic lens and prevents softening and burning
3Manufacturing precision
If aspheric lens is used for the field lens, then imaging quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the field lens into multiple sections with different optical parameters, allowing each section to be manufactured separately with standard spherical surfaces, then assembled to achieve overall aspheric optical effect
4Volume of moving object
If narrow and long cooling air duct is used, then device size is reduced, but cooling efficiency decreases and dust accumulation increases
Solution Approach 1:
The patent replaces air cooling with liquid cooling, using liquid's higher specific heat capacity and thermal conductivity to improve cooling efficiency while maintaining compact dimensions
Solution Approach 2:
The patent introduces liquid cooling medium as an intermediary between the light valve and heat dissipation structures, enabling more efficient heat transfer without requiring large air ducts
5Length of moving object
If incident lens and field lens are placed close to light valve, then optical path length is reduced, but heat dissipation is impaired and imaging quality suffers
Solution Approach 1:
The patent designs the incident lens and field lens to serve dual functions: optical function and heat dissipation. The lenses are integrated with liquid cooling channels, allowing them to conduct heat away from the light valve while maintaining their optical positioning
Solution Approach 2:
The patent uses composite structure combining lens material with liquid cooling channels, creating components that simultaneously perform optical focusing and thermal management functions
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 liquid lens system enhances illumination efficiency, reduces stray light, improves image quality, and extends the service life of the projector by ensuring efficient heat dissipation and temperature equalization, resulting in higher brightness and reduced heat dissipation noise.
Implementation Method 1
the first liquid lens cools the LCD light valve and the incident lens
Implementation Method 2
the incident lens and the first liquid lens are integrated without air gap to refract and shape the light
Data Source
AI summary
A projector light valve module with a liquid lens includes: a structural support, an LCD light valve, and an incident lens, wherein the incident lens is connected to a first end of the structural support; a first cavity is sealed and is formed by the incident lens, the structural support and the LCD light valve, and the first cavity is filled with transparent cooling liquid; similarly, the emergent lens is connected to a second end of the structural support, to form a second cavity and a second liquid lens. The present invention combines heat dissipation and optics, and provides more efficient lighting and better imaging quality through optical and heat dissipation effects of the first and second liquid lenses, thereby achieving better heat dissipation, and better user experience and satisfaction.