a rear projection system

Abstract

A rear projection system and screen for achieving depth information collection and simultaneously enhancing user viewing experience. The projection system comprises: a projection screen (1) comprising a scattering layer (11), for displaying an image; a projection apparatus (2), for projecting visible light towards the projection screen (1) to enable to the projection screen (1) to display the image; a depth information collection apparatus (3), located at the same side of the projection screen (1) as the projection apparatus (2), for projecting non-visible light towards an object located on the other side of the projection screen, and receiving the non-visible light reflected from the object so as to obtain depth information of the object. The wavelength of the non-visible light is greater than the wavelength of the visible light. The scattering layer (11) causes the visible light and the non-visible light coming from one side of the projection screen to undergo Rayleigh scattering, and the intensity of scattering is greater for the visible light than for the non-visible light.

Description

Technical field [0001] The invention relates to the field of projection technology, in particular to a rear projection system. Background technique [0002] According to the position of the projector in the projection system, the projection system can be divided into a front projection system and a rear projection system. Generally, the projection system in which the projector is installed behind the projection screen is called a rear projection system, also called a rear projection system. The projection device can be hidden behind the projection screen, and the user does not need to see the projection device when watching the projection, which makes the user feel better. Therefore, the rear projection system has been widely used in many scenarios, such as remote video conferences. Scenes or home entertainment scenes, etc. [0003] In the process of using the rear projection system, it may be necessary to collect the depth information of the objects in the scene in many situation...

AI Technical Summary

Problems solved by technology

[0004] Generally, the depth collection device can be set behind the projection screen, and the projection screen can be set to be light-transmissive, so that the infrared light projected by the depth collection device can pass through the projection screen and be projected onto the objects in front of the projection screen to realize depth. The collection of information, however, this also allows users located in front of the projection screen to see not only the projected image, but also objects behind the projection screen, such as projection equipment, depth acquisition equipment and other objects, thereby interfering with the viewing effect of the projection image And affect the user's viewing experience. In addition, for example, the light source (such as a light bulb) of the projection device may also irritate the user's eyes, affecting the user's viewing experience of the projected image.

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