Projection Apparatus Angle of View Control for Resolution Maintenance
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Solution Overview
Problem
Existing projection technologies face challenges in maintaining image quality when the size of the projection video is changed, as the resolution of the projection video deteriorates, leading to difficulties in ensuring clear visibility for the user.
Innovation Solution
The projection apparatus includes a controller that performs video signal processing and optical zoom control to adjust the angle of view and size of the projection video, ensuring that the resolution remains at or above a predetermined value by decreasing the angle of view when the resolution drops below a certain threshold, thereby maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the size of the projection video is changed through video signal processing, then the position or size of the object in the image can be adjusted, but the resolution of the projection video deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the angle of view parameter of the projection unit based on the resolution threshold. When video signal processing reduces the projection video size below the predetermined resolution threshold, the system changes the angle of view parameter to decrease it, which consequently increases the resolution back to or above the threshold level. This parameter adjustment resolves the contradiction between size adaptability and resolution maintenance.
2Measurement precision
If the angle of view is decreased to increase resolution, then the resolution of the projection video is maintained at or above the predetermined value, but the size of the projection video is further reduced
Solution Approach 1:
The patent implements a feedback control mechanism where the controller continuously monitors the resolution of the projection video after size adjustment. When the resolution falls below the predetermined threshold, the system provides feedback by decreasing the angle of view, which increases the resolution back to the acceptable level. This closed-loop feedback resolves the contradiction by automatically balancing resolution maintenance with size adjustment, preventing resolution deterioration while allowing flexible size control.
Data Source
AI summary
A projector apparatus includes a projection unit and a controller. The projection unit projects projection video of an image at a set angle of view on a projection surface in accordance with a video signal indicating the angle of view of the image including an object. The controller performs video signal processing for changing a position or size of the object in the image and controls the position or size of the projection video on the projection surface. In a case where the position or size of the object is to be changed by the video signal processing, when a resolution of the projection video of the changed object is less than a predetermined value, the controller controls the projection unit to decrease the angle of view so that the resolution of the projection video is equal to or greater than the predetermined value, and the controller sets the size of the object in the image by the video signal processing.