Projector Cooling Control for Discharge Lamp Life
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Solution Overview
Problem
The service life of discharge lamps in projection type display apparatuses is reduced due to inadequate cooling, which varies with the installation attitude, leading to accelerated deterioration.
Innovation Solution
A projector system that includes a discharge lamp with a cooling unit and a controller to detect the installation attitude, shutting down the lamp when it is in an attitude where cooling is insufficient, thereby preventing excessive heating and extending the lamp's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector is designed to project both horizontally long image and vertically long image by changing installation attitude, then the adaptability is improved, but the cooling effectiveness deteriorates in certain attitudes
Solution Approach 1:
The cooling device dynamically adjusts its cooling action based on the detected installation attitude. The controller activates the cooling device only when the projector is in a first attitude or second attitude where effective cooling is possible, and deactivates it in a third attitude where cooling would be ineffective, thereby adapting the cooling system to the operational context
Solution Approach 2:
The detection unit continuously monitors the installation attitude and provides feedback to the controller, which then adjusts the cooling device operation accordingly. This closed-loop feedback mechanism ensures the cooling system operates effectively only when the projector is in suitable installation attitudes
2Temperature
If the cooling device operates continuously in all installation attitudes, then the temperature control is improved, but the service life of discharge lamp deteriorates due to insufficient cooling in inappropriate attitudes
Solution Approach 1:
The cooling device transitions from continuous operation to conditional dynamic operation based on installation attitude. The controller activates cooling only in first and second attitudes where it is effective, and deactivates in third attitude, optimizing both temperature control and service life extension
Solution Approach 2:
By preventing operation in the third attitude where cooling is insufficient, the system avoids accelerating degradation of the discharge lamp, effectively extending its service life through selective operation based on cooling capability
3Productivity
If the discharge lamp is operated in the third attitude where cooling is insufficient, then the productivity is improved, but the deterioration of discharge lamp accelerates
Solution Approach 1:
The controller preemptively prevents operation of the discharge lamp in the third attitude by deactivating the cooling device and controlling the discharge lamp driving unit to stop lamp operation, thereby avoiding the harmful effect of insufficient cooling before it can accelerate lamp deterioration
Solution Approach 2:
The detection unit provides real-time feedback on installation attitude, enabling the controller to immediately respond by adjusting cooling and lamp operation to prevent deterioration in unsuitable attitudes
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
The system effectively prevents discharge lamp deterioration by ensuring it is not excessively heated in unfavorable attitudes, thereby improving its service life and user convenience.
Implementation Method 1
a cooling unit configured to cool the discharge lamp according to an installation attitude of the projector
Implementation Method 2
a cooling unit configured to cool the discharge lamp according to an installation attitude of the projector
Implementation Method 3
a discharge lamp which is provided with a first electrode and a second electrode and configured to emit light
Data Source
AI summary
A projector which configured to project a horizontally long image and a vertically long image, includes a cooling unit configured to cool a discharge lamp according to an installation attitude of the projector, a detection unit configured to detect the installation attitude, and a controller configured to control a discharge lamp driving unit and the cooling unit, in which the installation attitude includes a first attitude for projecting the horizontally long image and a second attitude for projecting the vertically long image, and in which the controller is configured to put out the discharge lamp in a case where the installation attitude detected by the detection unit is a third attitude which is different from both of the first attitude and the second attitude.