Projector Thermo-Sensitive Component Overheating Protection
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Solution Overview
Problem
Conventional projectors with mechanical thermal breakers face challenges in cost reduction, space efficiency, and complex installation due to their size and separate installation from other electronic components, making them less effective for overheating protection.
Innovation Solution
A projector design utilizing a thermo-sensitive component integrated with the power module, which generates an air flow to dissipate heat and selectively stops powering the light source module based on temperature parameters, allowing for quick response and reduced space and cost, with the thermo-sensitive component positioned adjacent to the lampshade within the air flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical thermal breaker is used for overheating protection, then the projector can be protected from damage, but the device complexity and cost increase due to the complicated composition and separate installation
Solution Approach 1:
The patent integrates the thermal breaker component directly into the existing circuit board structure, merging the overheating protection function with the power module. This eliminates the need for separate mechanical thermal breaker installations and reduces overall device complexity while maintaining protection reliability
Solution Approach 2:
The patent replaces the traditional mechanical thermal breaker mechanism with an electronic sensing and control system. The thermal breaker uses electronic components (temperature sensor, control circuit) to detect and respond to overheating conditions, substituting the mechanical composition with an electronic system that is more integrated and less complex
2Reliability
If a mechanical thermal breaker is used for overheating protection, then the projector can be protected from damage, but the volume and disposition space required increase
Solution Approach 1:
The thermal breaker is merged with the circuit board structure, utilizing the existing PCB space and components. This integration eliminates the need for additional dedicated space for a separate mechanical thermal breaker, reducing the overall volume required for overheating protection functionality
3Reliability
If a mechanical thermal breaker is installed independently from other electronic components, then the overheating protection can be provided, but the installation complexity and cost increase
Solution Approach 1:
The thermal breaker is designed as an integrated component of the power module circuit board, combining multiple functions (power supply, sensing, control) into a single assembled unit. This eliminates separate installation steps for the thermal breaker and reduces manufacturing complexity
Solution Approach 2:
The circuit board serves multiple functions: it provides power to the light source module, integrates the temperature sensing function, and implements the control logic for overheating protection. This multi-functionality eliminates the need for separate dedicated thermal breaker installation
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 solution provides effective overheating protection with a quick response, reduced installation complexity, and lower costs by integrating the sensing module into the existing circuit board, enhancing reliability and space efficiency.
Implementation Method 1
The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component. The thermo-sensitive component is disposed adjacent to the lampshade and located in a flowing path of the air flow.
Implementation Method 2
The flow generating device is used for generating an air flow flowing through the apparatus casing and dissipating heat produced by the light source module.
Data Source
AI summary
A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.