Vertical and horizontal frame projection screen

Abstract

The invention discloses a vertically and horizontally variable amplitude frame projection screen, comprising a first scroll, a second scroll, a frame, supports and a curtain, wherein the frame is composed of two first telescopic borders, a second telescopic border and a third telescopic border which are sequentially, alternately, symmetrically and fixedly connected with one another; the two first telescopic borders are used as left and right borders; the second telescopic border is used as an upper border; the third telescopic border is used as a lower border; the back surface of the frame, two ends of the two first telescopic borders and two ends of the second telescopic border are fixedly connected with the supports respectively; the first scroll is arranged between the supports which are arranged at two ends of the first telescopic borders and is fixedly connected with the supports; the second scroll is arranged between the supports which are arranged at two ends of the second telescopic border and is fixedly connected with the supports; the curtain is inversely T-shaped; the inversely T-shaped curtain is inversely arranged between the frame and the first scroll or between the frame and the second scroll; two edges of the lower part of the curtain are fixedly connected with the first scroll respectively; the upper part of the curtain is fixedly connected with the second scroll; and a magnetic stripe is arranged among the edge (except for the edges, which are connected with the first scroll or the second scroll, of the curtain) of the curtain, the frame and the curtain, and is fixedly connected with the edge, the frame and the curtain.

Description

technical field [0001] The invention relates to a projection screen, which is a projection screen with a vertical and horizontal amplitude variable frame. Background technique [0002] The projection screen is a tool used to display projected images of images and video files in movies, offices, home theaters and large conferences. Projected images in the prior art are in different formats such as aspect ratio 1.78:1 (16:9), 2.35:1 (21:9), and most users who watch projected images usually only use a projection screen of one format. When projecting images with different projection screen formats, it is necessary to make the size of one direction of the projected image the same as the size of the same direction of the projection screen used. There will be black borders or image clipping outside the image boundary of the other direction of the projection screen, although it can be viewed A projected image that is of a different format than the projection screen being used, but ...

AI Technical Summary

Problems solved by technology

Projected images in the prior art are in different formats such as aspect ratio 1.78:1 (16:9), 2.35:1 (21:9), and most users who watch projected images usually only use a projection screen of one format. When projecting images with different projection screen formats, it is necessary to make the size of one direction of the projected image the same as the size of the same direction of the projection screen used. There will be black borders or image clipping outside the image boundary of the other direction of the projection screen, although it can be viewed A projected image of a different format than the projection screen being used, but where black borders or image cropping on the projection screen interfere with viewing the projected image

There are also some screens that use the masking panel to slide and cover part of the screen, so as to realize the change of the aspect ratio of the non-blocking part of the screen, and project images corresponding to different aspect ratios, eliminating the black border or image clipping displayed on the general fixed frame screen, but the blocked part still exists on the projection screen Even in a low-light environment (a completely dark audio-visual room is also a low-light environment due to the light emitted by the projector), the latitude of the human eye can still accurately identify the image boundary and frame boundary, and can also identify the matte panel within the frame boundary The existence of the influence of the viewing effect

Moreover, there is a common shortcoming in the above method, that is, when viewing a projected image with a different format from the used projection screen, black borders or image clipping will appear outside the image boundary, and the projected area of ​​the projected image is smaller than the area of ​​the used projection screen, that is, the mask The image area after the mask is smaller than the image area before the mask, which is equivalent to viewing a small-format projected image

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