Image Projection Apparatus Curvature Adjustment Controller
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Solution Overview
Problem
Image projection apparatuses face challenges in maintaining a flat image plane due to manufacturing or assembly errors, leading to field curvature issues when the projection optical system is interchanged, causing user confusion and requiring manual adjustments.
Innovation Solution
An image projection apparatus with a controller that acquires and adjusts the field curvature adjustment unit to a reference position when detecting a change in the projection optical system, ensuring a flat image plane for comfortable use, using a combination of sensors and memory to store and retrieve necessary information for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projection optical system is made interchangeable to allow different lenses, then the versatility and adaptability of the projector is improved, but the field curvature may become curved due to manufacturing or assembly errors, requiring manual adjustment and causing user confusion
Solution Approach 1:
The control unit automatically moves the field curvature adjustment unit to a reference position that makes the image plane flat when an interchange of the projection optical system is detected. This preliminary action eliminates the need for manual adjustment by users, resolving the contradiction between interchangeability and ease of operation
Solution Approach 2:
The system detects the interchange of the projection optical system and provides feedback to the control unit, which then automatically adjusts the field curvature adjustment unit. This closed-loop feedback mechanism ensures the image plane is properly positioned without requiring user intervention, maintaining both versatility and ease of operation
2Manufacturing precision
If the field curvature adjustment unit is manually adjusted to compensate for manufacturing errors, then the image plane can be made flat, but the device complexity increases and requires user knowledge and time
Solution Approach 1:
The system performs self-adjustment by automatically moving the field curvature adjustment unit to the reference position when an interchange is detected. This self-service capability eliminates the need for manual user adjustment, reducing the perceived complexity while maintaining manufacturing precision through automated control
Solution Approach 2:
The control unit changes the position parameter of the field curvature adjustment unit to the reference position automatically. By controlling the positional parameter through software rather than requiring manual mechanical adjustment, the system maintains precision while simplifying the user interface and reducing operational complexity
3Adaptability or versatility
If the field curvature is adjusted for a curved screen application, then the projection image can be focused on curved surfaces, but the image plane remains curved and requires re-adjustment when switching back to flat screen mode
Solution Approach 1:
When an interchange of the projection optical system is detected, the control unit preliminarily adjusts the field curvature adjustment unit to the reference position that provides a flat image plane. This preliminary action prepares the system for flat screen mode, eliminating the need for users to manually re-adjust when switching from curved to flat screen applications
Solution Approach 2:
The system dynamically adjusts the field curvature adjustment unit based on the detected optical system interchange. This dynamic response allows the system to adapt automatically to different usage scenarios, reducing the time loss associated with manual re-adjustment while maintaining versatility for both flat and curved screen applications
Data Source
AI summary
An image projection apparatus configured to project a projection image on a projected surface via a projection optical system that includes a first optical system capable of adjusting a curvature amount of an image plane and is interchangeably attached to the image projection apparatus includes an acquirer configured to acquire information on a reference position of the first optical system, and a controller configured to move the first optical system to the reference position when detecting an interchange of the projection optical system or when accepting an instruction from a user.