Projector Cooling Layout for Dust-Proof Liquid Crystal Panels
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Solution Overview
Problem
Existing projection type display devices face challenges in efficiently cooling components while maintaining a sealed structure to prevent dust entry, which leads to increased size and performance deterioration.
Innovation Solution
The implementation of a dust-proof case housing an illumination optical system, blowers, ducts, and a heat sink, with air circulation paths designed to cool liquid crystal panels efficiently while preventing dust ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple sealing portions are added to prevent dust entry, then dust-proof performance is improved, but device complexity and size increase
Solution Approach 1:
The dust-proof case merges the sealing function with the housing structure itself, eliminating the need for separate sealing components. The case is designed as an integrated sealed enclosure that houses all cooling components (blowers, ducts, heat sink) while preventing dust entry, thus improving dust-proof performance without increasing device complexity
Solution Approach 2:
The dust-proof case serves multiple functions simultaneously: it acts as the structural housing, provides dust-proof sealing, and contains the cooling system components. This multi-functionality reduces the need for additional sealing portions and simplifies the overall structure
2Object-affected harmful factors
If a sealed structure is implemented to prevent dust entry, then dust-proof performance is improved, but cooling efficiency deteriorates due to complex circulation paths
Solution Approach 1:
The sealed dust-proof case is segmented into distinct functional zones with dedicated air circulation paths. The first duct guides air from blowers to liquid crystal panels, while the second duct guides air in the opposite direction, creating efficient segmented flow paths that maintain cooling effectiveness within the sealed structure
Solution Approach 2:
The dust-proof case acts as an intermediary sealed environment that accommodates the cooling system. By designing the case to inherently include the cooling components and their circulation paths, it mediates between the requirement for dust-proof sealing and the need for efficient cooling without requiring complex external sealing mechanisms
3Temperature
If blowers are added to cool components, then cooling performance is improved, but noise and energy consumption increase
Solution Approach 1:
Multiple blowers are merged into a coordinated cooling system within the sealed dust-proof case, working together to cool multiple components (light source, liquid crystal panels, heat sink) simultaneously. This integrated approach improves cooling performance while the sealed case contains and directs airflow to minimize noise propagation
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 enables effective cooling with reduced noise and cost, extends the life of liquid crystal panels, and minimizes apparatus size by optimizing air circulation and reducing the need for complex sealing.
Implementation Method 1
a heat sink that removes heat from the air that has passed through the second duct
Implementation Method 2
blowers that cool liquid crystal panels mounted on the illumination optical system, a first duct that guides the air blown out from the blowers to the liquid crystal panels, a second duct that guides the air passing through the liquid crystal panel in the direction opposite to the direction of the air blown out from the blowers
Data Source
AI summary
An electronic device includes an illumination optical system for outputting light to the projection lens, a blower for cooling a liquid crystal panel mounted on the illumination optical system, a first duct for guiding the air blown out from the blower to the liquid crystal panel, a second duct for guiding the air passing through the liquid crystal panel in the direction opposite to the direction of the air blown out from the blower and a heat sink for removing heat from the air passing through the second duct, and a holding member for holding the blower and guiding the air from which heat has been removed by the heat sink to the air inlet of the blower is provided in a dust-proof case.