ES1069406U - Rear projection screen (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Rear projection screen (1), characterized in that it comprises three flat rear projection sectors (2, 3, 4) each provided with a frame (2a, 3a, 4a) with the side frames of two of them fixed contiguous to both opposite sides of the lateral frames of the third one and being the three in different planes (Γ, Π, Σ), oriented so that the three sectors (2, 3, 4) are oriented towards the same point (p), it being possible in this way to project independent images on three non-coplanar sectors (2, 3, 4) with a single projector (5). (Machine-translation by Google Translate, not legally binding)

Description

Rear projection screen.

The present invention relates to a screen overhead projection that allows simultaneous projection of three independent images with a single projector, providing high quality images of focus on people arranged in points different.

Background of the invention

The videowall technique is known, based on the juxtaposition of electronic type screens to which different contents are sent, which can form a unit, both from the point of view of the image itself, which presents a continuity along the three screens , as from the point of view of the contents.

This same juxtaposition technique is also used with overhead projectors, then using a plurality of rear projection surfaces each associated with a projector.

The two systems described above are complex, and above all, expensive, due to the amount of projectors necessary, to the electronic redistribution systems of contained in the different projectors / screens, and also to the structural needs to arrange the whole.

Therefore, the need for have a screen to solve the problems raised, that is to say, to project different images in different screens, reducing the need for projectors, of screens, screen support structures and systems electronic distribution of images on screens.

Description of the invention

For this, the present invention proposes a overhead projection screen characterized by the fact that It comprises three flat rear projection sectors each provided of a frame, the side frames of two of them being fixed adjacent to both opposite sides of the side frames of the third and the three sectors being in different planes, oriented so that the three sectors are oriented towards the same point, thus being possible to project images independent over three non-coplanar sectors with a single projector.

With this solution the problems are solved mentioned, namely:

- With a single projector it can be projected in orthogonal on all three screens simultaneously.

- It is only necessary, to supply three independent images, have an editing program for images to that effect.

- The screen is set as a piece only very manageable and lightweight that can be hung without the need for additional structures

- Being the screens oriented in Different addresses, allow to reach a wider audience.

Therefore, the screen of the invention allows to mount a rear projection system based on a single projector and a dynamic image editing program specially adapted to coincide with the three sectors of the screen.

This solution, contrary to the most common projection solutions in which it is sought to project on a plane, takes advantage of the projected images at the ends of the projection sector, which is where the images are most deformed when projecting on a plane. In addition, its format is especially useful when you want to use the eye-catcher splitting technique, which consists of projecting striking images on certain screens to direct the public's attention to the screen, for example in this case the sides, and on the other , in this case the central, the information itself.

Preferably, the angle formed by the planes  which contain the lateral sectors with the central sector is between 15 and 25 °, more preferably between 19 and 21 ° and even more preferably it is 20 °.

These angle selections are especially  adapted to project with a single projector and get the same Time a good approach in each of the three sectors.

Advantageously, the rear projection screen It is of the type that includes dispersion microspheres, technology that offers brightness benefits specially adapted for projection in environments with ambient lighting

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Finally, the three sectors have a height of 330 ± 20 mm, the central sector has a width of 600 ± 30  mm, and the lateral sectors have a width of 400 ± 30 mm and even more advantageously the frame has a width of 20 ± 5 mm, frame dimensions that allow, with plastic materials or aluminum, configure the own framework of each of the sectors and serve as a zone of union between contiguous sectors.

Brief description of the drawings

For a better understanding of how much has been exposed Some drawings are accompanied in which, schematically and only by way of non-limiting example, a case study is represented of realization.

Figure 1 is a perspective view of the rear projection screen of the invention seen from below, by right side.

Figure 2 is a front elevation view of the  overhead projection screen of the invention.

Figure 3 is a plan view of the overhead projection screen of the invention in which they are appreciated the relative angles between the planes of the three sectors and the Orientation possibilities with respect to a projector.

Description of a preferred embodiment

As illustrated in Figures 1 to 3, the overhead projection screen 1 of the invention comprises three flat-backed sectors 2, 3 and 4 each provided with a 2nd, 3rd and 4th frames respectively, the side frames being two of them fixed adjacent to both opposite sides of the frames lateral of the third and the three being in different planes \ Gamma, \ Pi, \ Sigma. Specifically, according to the invention, these planes or sectors of the screen have relative angles so that the three sectors 2, 3 and 4 are oriented towards it point P, thus being able to project images independent over three sectors 2, 3, 4 non-coplanar with a single projector 5.

As can be seen in figure 1, the fact project on three sectors contained in different planes, combined with the frameworks of each sector, it allows the independence of the image from a single projector, so it seems that it is projecting with three projectors. In addition, the screen with three sectors allows the viewing of information from more points, what which makes the rear projection screen of the invention be specially adapted for wide passageways, since the angle given to the side screens makes the advertising messages reach a greater number of objectives.

According to a preferred embodiment of the invention,  the angle formed by the planes that contain the sectors lateral with the central sector is about 20 ° and the surfaces of overhead projections are of the type that comprise microspheres of dispersion, having shown especially adequate this combination of parameters to project with projectors medium-low intensity

Appropriate measures to perform a optimal display, both from the point of view of the surface of projection as of the possibilities of hanging it from the ceiling with virtually invisible nylon threads are such that all three sectors have a height of 350 ± 20 mm, the central sector it has a width of 600 ± 30 mm, and the lateral sectors have a width of 340 ± 30 mm.

Also, a suitable frame would have a width 20 ± 5 mm.

Figure 3 shows to what extent the angle formed by the lateral sectors improves the incidence of what rays of light on these, especially due to the uniformity in the intensity of light and the reduced effects of distortion.

The invention is specially adapted for a  content editor to project that allows editing images independent (obviously can be made dependent) in the Three sectors

Claims (7)

1. Rear projection screen (1), characterized by the fact that it comprises three flat rear projection sectors (2, 3, 4) each provided with a frame (2nd, 3rd, 4th) with the side frames of two of them fixed adjacent to both opposite sides of the third side frames and the three being in different planes (\ Gamma, \ Pi, \ Sigma), oriented so that the three sectors (2, 3, 4) are oriented towards the same point ( P), thus making it possible to project independent images on three sectors (2, 3, 4) that are not coplanar with a single projector (5). 2. Screen (1) according to any of the previous claims, wherein the angle formed by the planes containing the lateral sectors with the central sector It is between 15 and 25 °. 3. Rear projection screen (1) according to the previous claim, wherein said angle is comprised between 19 and 21 °. 4. Rear projection screen (1) according to the previous claim, wherein said angle is 20 °. 5. Rear projection screen (1) according any of the preceding claims, wherein the overhead projection screen is of the type that includes dispersion microspheres 6. Rear projection screen (1) according any of the preceding claims, wherein the three sectors have a height of 350 ± 20 mm, the central sector it has a width of 600 ± 30 mm, and the lateral sectors have a width of 400 ± 30 mm. 7. Rear projection screen (1) according any of the preceding claims, wherein the frame It has a width of 20 ± 5 mm.