Back projection system and screen

Abstract

The invention discloses a back projection system and a screen, and aims to realize depth information acquisition and enhancement of watch feeling of a user. The projection system comprises a projection screen of a scattering layer for representing an image, projection equipment and depth collection equipment, wherein the projection equipment used for projecting visible light to the projection screen to enable the projection screen to represent the image; and the depth collection equipment and the projection equipment are positioned on the same side of the projection screen and used for projecting invisible light to an object positioned on the other side of the projection screen through the projection screen to receive reflective light which is obtained by reflection on the invisible light by the object, so as to further obtain the depth information of the object, and the wavelength of the invisible light is longer than that of the visible light, wherein the scattering layer performs rayleigh scattering on the visible light and invisible light from one side of the projection screen; and the scattering intensity of the scattering layer on the visible light is greater than the scattering intensity of the scattering layer on the invisible light.

Description

technical field [0001] The invention relates to the technical field of projection, in particular to a rear projection system and a screen. 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 with the projector set behind the projection screen is called a rear projection system, also known as 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 during the projection process, which makes the user feel better. Therefore, the rear projection system has been widely used in many scenarios, such as remote video conferencing scene or home entertainment scene, 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 ca...

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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