Rear projection dome screen of visual display system

Abstract

A rear projection dome screen of a visual display system not only can realize panoramic image display, but also can improve the pixel utilization rate of a single projector, thereby avoiding the use of a large number of projectors, and reducing the manufacturing cost of the visual display system. According to the rear projection dome screen of the visual display system, a projector projects a projection picture to the rear projection dome screen, an optical eye point is located in the center of the rear projection dome screen, a main body of the rear projection dome screen is an annular curved surface side wall, and the horizontal curvature radius R1 corresponding to each point on the annular curved surface side wall is smaller than the corresponding vertical curvature radius R2.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a rear projection ball screen of a visual display system. Background technique [0002] The general real image visual display system mostly uses a front projection flat screen to project the image of the projector on it. However, for occasions that require immersive effects (such as flight training simulators), the front pitching screen is often used as the projection screen. Compared with the front-projection plane screen, the image distance consistency of the front-projection flat screen and the observer's eye point is good, so the front-pitch screen is widely used in flight training simulators and some simulation devices that require high immersion. Since the simulation trainer generally includes equipment such as a simulated cockpit in addition to the visual display system, these devices are generally arranged inside the front pitching screen, and the projection ligh...

AI Technical Summary

Problems solved by technology

[0004] Most of the available projectors in the market have an aspect ratio of 16:10 or 16:9. The projector with this aspect ratio has a low matching rate with the rear projection ball screen used in the flight simulator. Most of the pitching screens are spherical structures with the same horizontal radius and vertical radius

In this way, the projection screen of a single projector channel is projected onto the rear projection ball screen with low pixel uniformity, and the matching degree of the two is low. Then, in order to make the pixel resolution of the projection screen uniform, more projector channels are needed to project the screen. Take the parts with uniform and clear pixel resolution and stitch them together to present the complete and clear picture that the human eye sees finally. In this way, due to the limitation of the projector's aspect ratio and the projector's depth of field, as well as the requirements for the definition and quality of the projected picture, it currently meets the above-mentioned requirements. Two requirements (panoramic image display requirements and resolution requirements) simulators with panoramic rear-projection ball screen visual display systems generally have the problem of low pixel utilization of a single projector, which leads to excessive use of projectors and high cost The problem

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