Projector Fan Diagnosis and Light Source Control
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Solution Overview
Problem
Projection type display apparatuses face issues with maintaining sufficient cooling performance due to fan malfunctions, leading to increased temperatures and potential housing damage, which results in sudden video output stoppages during critical events.
Innovation Solution
Incorporating a fan diagnosis section that detects malfunctioning fans and adjusts the light source control to turn off corresponding lamps, allowing the projector to continue operating while maintaining cooling for remaining lamps, thus preventing temperature-related damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple fans are provided to cool multiple light sources, then cooling performance is improved, but device complexity increases
Solution Approach 1:
The cooling system is segmented into multiple independent fan units, each responsible for cooling a specific light source. This allows the system to scale cooling capacity by adding individual fan units rather than redesigning the entire cooling system, thus improving cooling performance while managing complexity through modular design.
Solution Approach 2:
The control section is designed to universally manage multiple fan units and light sources, applying the same control logic and diagnosis routine to each component. This multi-functional approach allows the system to handle various cooling scenarios (normal operation, partial failure, complete failure) with a single unified control mechanism, improving cooling performance without proportionally increasing control complexity.
2Reliability
If a fan malfunctions, then cooling performance deteriorates, but continuous operation is required for high reliability
Solution Approach 1:
The control section continuously monitors the operational status of each fan unit and receives feedback on their performance. When a fan malfunction is detected, the system automatically adjusts by turning off the corresponding light source to maintain proper temperature control. This feedback mechanism ensures continuous reliable operation of the projector while preventing temperature-related damage from fan failures.
Solution Approach 2:
The system prepares for potential fan failures by having pre-programmed response protocols in place. When a fan malfunction occurs, the control section immediately executes the predetermined action of turning off the corresponding light source, cushioning against the harmful effects of overheating before they can cause damage. This prior preparation enables seamless continuation of projector operation with remaining functional components.
3Temperature
If all light sources are turned off due to fan malfunction, then temperature control is improved, but productivity decreases
Solution Approach 1:
Instead of turning off all light sources uniformly, the system applies local quality control by selectively turning off only the specific light source corresponding to the malfunctioning fan while keeping other light sources operational. This localized response maintains temperature control for each individual light source-fan pair while preserving the overall productivity of the projector by continuing to project video with the remaining functional light sources.
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 continuous video projection even with fan malfunctions, allowing for scheduled maintenance and preventing apparatus damage, ensuring high reliability and prolonged operation.
Implementation Method 1
a fan for cooling the light source; a fan diagnosis section configured to diagnose a state of each of the plurality of fans
Data Source
AI summary
A projection type display apparatus (50) includes: a plurality of light sources (100a) and (100b); a light source control section (101) configured to control each of the plurality of light sources (100a) and (100b); a plurality of fans (102a) and (102b), provided to correspond to the plurality of light sources (100a) and (100b), respectively, for cooling the corresponding light sources; and a fan diagnosis section (104) configured to diagnose a state of each of the plurality of fans (102a) and (102b). When a malfunction of one of the plurality of fans (102a) and (102b) is detected by the fan diagnosis section (104) while the plurality of light sources (100a) and (100b) are lit up, the light source control section (101) turns off one of the light sources corresponding to the one fan and continues to light up the remainder of the light sources.