Projector Liquid Cooling Housing with Stirring Mechanism
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Solution Overview
Problem
Existing projector cooling systems face challenges in effectively cooling high-temperature components due to low heat transfer coefficients and noise issues, and indirect cooling methods require larger devices and can lead to resolution unevenness in projected images.
Innovation Solution
A projector design incorporating a housing with encapsulated cooling liquid and a stirring device to directly cool light modulation devices, while keeping the control device outside to prevent heat interference, and using a restriction section to prevent cooling liquid flow near the projection optical device to minimize resolution unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling blast is supplied to light modulation devices using a cooling fan, then cooling is provided to the light modulation devices, but the heat transfer coefficient is low and noise is generated
Solution Approach 1:
The patent replaces air-based cooling (pneumatic) with liquid-based cooling (hydraulic). The light modulation devices are immersed in cooling liquid contained within a sealed housing, enabling direct heat transfer from the devices to the liquid. This hydraulic cooling system provides a much higher heat transfer coefficient compared to the pneumatic cooling fan system, thereby resolving the contradiction between cooling efficiency and noise generation.
2Temperature
If indirect cooling is used through heat receiving section, then cooling is provided to cooling target, but device size increases and cooling target cannot be effectively cooled at high temperatures
Solution Approach 1:
The patent merges the cooling liquid containment function and the light modulation device mounting function into a single integrated housing structure. The housing simultaneously serves as the container for the cooling liquid and as the mounting structure for the light modulation devices, which are directly immersed in the liquid. This eliminates the need for separate heat receiving sections and indirect cooling pathways, thereby reducing device size while enabling effective direct cooling.
3Temperature
If cooling liquid flows near projection optical device, then cooling is provided, but resolution unevenness occurs in projected image
Solution Approach 1:
The patent applies local quality by creating different functional zones within the cooling system. The housing is designed with a specific geometry where the light modulation devices are immersed in cooling liquid, but the projection optical device is positioned in a region where cooling liquid flow is restricted or absent. This localized differentiation ensures that cooling is applied where needed (at the light modulation devices) while preventing cooling liquid from interfering with the projection optical device, thereby maintaining image resolution uniformity.
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
This configuration enhances cooling efficiency, reduces noise, and maintains image quality by directly cooling light modulation devices and preventing resolution unevenness, resulting in improved projector performance.
Implementation Method 1
the heat of the light modulation devices is transferred to the cooling liquid
Implementation Method 2
a stirring device adapted to stir the first cooling liquid inside the housing
Data Source
AI summary
A projector includes a light source device, a plurality of light modulation devices each adapted to modulate a light beam emitted from the light source device, a light combining device adapted to combine the light beams respectively modulated by the light modulation devices, a projection optical device adapted to project the light beam combined by the light combining device, a housing in which the light modulation devices and the light combining device are disposed, the housing having a first cooling liquid encapsulated inside, a stirring device adapted to stir the first cooling liquid inside the housing, and a control device disposed outside the housing and connected to the housing, the control device adapted to control the light modulation devices. The housing has a connection section connecting the control device and a plurality of light modulation device side signal lines respectively extending from the light modulation devices to each other.