Projector Thermal Control via Dynamic Light Output Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projectors fail to operate or shut down prematurely when external air temperatures exceed a predetermined level, leading to user inconvenience and potential misinterpretation of projector malfunctions, despite internal overheating issues.
Innovation Solution
A control method that measures both internal and external temperatures, adjusts the light source and cooling fan outputs based on temperature differences, and controls these components to maintain operation even when internal temperatures exceed safe limits by reducing their output to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projector uses conventional cooling control that shuts down when external temperature exceeds a threshold, then component reliability is protected, but user convenience deteriorates and operational continuity is lost
Solution Approach 1:
The patent implements dynamic control of the light source output based on real-time temperature monitoring. The system transitions from static on/off control to dynamic adjustment, where the light source output is continuously adjusted according to the temperature difference between internal and external environments, allowing the projector to operate adaptively in high-temperature conditions while maintaining component safety
Solution Approach 2:
The patent employs feedback control by continuously monitoring the temperature inside the projector and comparing it with the external temperature. Based on this temperature difference feedback, the system adjusts the light source output and cooling fan operation, creating a closed-loop control system that maintains reliable operation while improving user convenience
2Reliability
If the projector shuts down when internal temperature reaches a threshold, then overheating damage is prevented, but operational duration is reduced and user convenience deteriorates
Solution Approach 1:
The system dynamically adjusts the light source output level based on real-time temperature conditions rather than using fixed shutdown thresholds. This allows the projector to maintain extended operational duration by continuously adapting its performance level to match thermal conditions, preventing overheating while maximizing usage time
Solution Approach 2:
The patent changes the operational parameters of the light source dynamically based on temperature conditions. By adjusting the light source output parameter in response to temperature differences, the system extends operational duration while maintaining component protection, moving from binary on/off control to continuous parameter adjustment
3Temperature
If the cooling fan operates at high speed to prevent overheating, then temperature control is improved, but energy consumption increases and noise increases
Solution Approach 1:
The cooling fan operation is dynamically adjusted based on real-time temperature monitoring and the temperature difference between internal and external environments. The fan speed is continuously optimized to match actual cooling needs, reducing unnecessary energy consumption and noise while maintaining effective temperature control
Solution Approach 2:
The system applies partial cooling action by adjusting the cooling fan speed according to actual thermal conditions rather than operating at maximum speed continuously. This partial action approach reduces energy consumption and noise while providing sufficient cooling to prevent overheating
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
Enables projectors to operate safely and continuously in high-temperature environments, preventing forced shutdowns and maintaining reliability, thus enhancing user convenience and extending usage time without overheating.
Implementation Method 1
the projector includes a cooling fan and a temperature sensor and it decrease or increase the speed of the cooling fan to cool its inside according to a temperature of its inside
Implementation Method 2
A light source part output determining step determining a light source part to be rated-output if the temperature measured in the temperature measuring step is a predetermined temperature or lower and to be attenuated-output if the temperature measured in the temperature measuring step is the predetermined temperature or higher
Data Source
AI summary
The present invention relates to a method for controlling a projector. More particularly, the present invention relates to a method for controlling a projector that enables a projector to operate even when the temperature of the ambient air exceeds a predetermined temperature, and prevents the operation of the projector from being forcibly terminated even when the inside of the projector overheats beyond a predetermined temperature.