Video Display System Rotation Control for Vertical Image Projection
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Solution Overview
Problem
Existing video display systems face issues with resolution and contrast when projecting important image regions that are long in the vertical direction, leading to reduced image quality due to increased enlargement ratio and overlapping projector regions.
Innovation Solution
A video display system comprising a first display device projecting a background image with a masked important image region, a second display device projecting the important image onto the background image, and a controller adjusting the rotation angle of the second display device to optimize the projection of the important image, ensuring minimal circumscribed rectangle alignment for enhanced resolution and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a plurality of projectors are used to project an important image region that is long in the vertical direction, then the important image region can be displayed, but the display area per projector becomes small and the enlargement ratio increases, resulting in deterioration of resolution
Solution Approach 1:
The patent introduces rotation around the optical axis as a new degree of freedom for the projector. By rotating the projector in the horizontal direction around its optical axis, the system can adjust the projection angle without changing the vertical projection geometry. This dimensional change allows the projector to maintain a larger display area while avoiding the need to increase enlargement ratio, thereby preserving resolution even when projecting tall image regions with multiple projectors.
2Area of stationary object
If a plurality of projectors are used to project an important image region that is long in the vertical direction, then the important image region can be displayed, but the sense of contrast is reduced in the overlapping region of the projectors
Solution Approach 1:
By enabling rotation around the optical axis, the system can adjust the horizontal projection angle of each projector independently. This allows for optimized positioning of projection beams to minimize overlap regions on the screen, thereby reducing the area where contrast degradation occurs. The rotation capability provides an additional degree of freedom to configure the projection geometry that avoids excessive overlapping while still covering the required vertical image region.
3Productivity
If the important image region is projected by a plurality of projectors without rotation control, then the projection can be completed, but the sense of resolution and contrast deteriorates
Solution Approach 1:
The patent makes the projector rotation angle a dynamic, adjustable parameter that can be changed based on the characteristics of the image region being projected. The controller dynamically adjusts the rotation angle around the optical axis according to the aspect ratio and dimensions of the important image region. This dynamic adjustment allows the system to optimize projection quality for different image configurations, maintaining high resolution and contrast by adapting the projection geometry to match the specific requirements of each projection task.
Data Source
AI summary
A video display system of the present disclosure includes a first display device configured to project a background image onto a region of an entire image including a predetermined important image, the background image including a masked region of the important image clipped from the entire image, a second display device configured to project the important image clipped from the entire image onto the region of the important image in the background image that has been projected, and a controller configured to control a rotation angle around an optical axis the second display device with respect to the important image to be projected, in accordance with an aspect ratio of the important image to project the important image clipped from the entire image onto the region of the important image.