Projection Apparatus Housing Deterioration Detection via Keystone Adjustment
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Solution Overview
Problem
Existing projection apparatuses lack effective methods to detect housing deterioration and notify users of potential issues, leading to unnoticed cracks and changes in projection angles that affect image quality.
Innovation Solution
A projection apparatus equipped with a processor and notification device that registers initial keystone correction angles and alerts users or administrators when the adjustment exceeds predetermined threshold values, providing warnings and potentially stopping the projection to draw attention to significant changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projection apparatus operates without housing deterioration detection, then the device complexity is reduced, but the reliability of the projection apparatus deteriorates due to unnoticed cracks and projection angle changes
Solution Approach 1:
The projection apparatus performs self-detection of housing deterioration by utilizing its own operational parameters (keystone correction values, projection angles) to monitor its own structural integrity, eliminating the need for separate external detection devices
Solution Approach 2:
The system continuously monitors keystone correction values and compares them against threshold values to detect changes in projection angle caused by housing cracks, providing feedback that triggers warnings or shutdowns when deterioration is detected
2Reliability
If continuous monitoring of projection angle is implemented, then the reliability improves, but the use of energy increases due to constant parameter checking
Solution Approach 1:
The system performs monitoring at periodic intervals by checking keystone correction values during normal operation and at startup, rather than continuous monitoring, reducing energy consumption while maintaining detection effectiveness
Solution Approach 2:
The system uses keystone correction values as an intermediary parameter to indirectly detect housing deterioration through projection angle changes, rather than directly monitoring structural integrity, which reduces the energy required for detection
Data Source
AI summary
The present invention aims to make it possible to detect deterioration of a housing of a projection apparatus and to notify a user of the deterioration of the housing. The projection apparatus includes a projected image processing unit which registers a deformation parameter as an initial value in a case where the deformation parameter for a projected image is set as an initial setting to be made at the time of installation of the projection apparatus as a registration control unit. In a case where the deformation parameter for the projected image is adjusted by a user operation after the initial setting is made, the projected image processing unit decides whether an adjustment degree that the deformation parameter is adjusted from the initial value reaches a predetermined threshold value as a decision unit. In addition, in a case where the adjustment degree reaches the predetermined threshold value, the projected image processing unit gives a warning to the user at a predetermined timing as a notification control unit.