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Novel rear projection screen
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A rear projection and screen technology, applied in the field of rear projection screens, can solve the problems of high cost, integration, and inconvenient installation, and achieve the effects of low cost, improved viewing angle, and convenient installation
Inactive Publication Date: 2012-12-26
王勇竞
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Abstract
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Problems solved by technology
However, the groove of the Fresnel lens generally faces the audience, and the groove layer of the Fresnel lens cannot be integrated with the scattering layer. The rear projection screen still has a multi-layer structure, which is costly and inconvenient to install.
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Embodiment 2
[0016] image 3 It is the second embodiment of the present invention;
[0018] Figure 4 It is the third embodiment of the present invention;
[0019] Wherein, 401 is a projector; 403 is a cylindrical mirror array and a scattering layer; 405 is a Fresnel lens layer; 406 is an audience.
Embodiment 1
[0021] figure 2 For the first embodiment of the present invention, a new rear projection screen, it includes a scattering layer 203 installed on one side near the projector, and a Fresnel lens layer 205 installed on the side near the audience, 201 for projection machine, 206 for the audience.
[0022] The projector 201, the scattering layer 203, the Fresnel lens 205 and the audience 206 are arranged in sequence.
[0023] The projector 201 emits light, and the scattering layer 203 uses fine particles to scatter the light projected by the projector 201 to uniformly distribute light energy. The Fresnel lens 205 converts the divergent light projected by the scattering layer 203 into near-parallel light and emits it to the direction of the audience 206. In this way, the brightness of the screen seen by the audience is high and uniform no matter what angle they see.
[0024] Embodiment two:
[0025] image 3 It is the second embodiment of the present invention, a new rear proje...
Embodiment 3
[0030] Figure 4 For the third embodiment of the present invention, a new rear projection screen includes a cylindrical mirror array 403 installed on one side close to the projector, and generally also includes a scattering layer 404 in or on the cylindrical mirror array, The Fresnel lens layers 405 and 401 on the side close to the audience are projectors, and 406 is the audience.
[0031] The projector 401, the cylindrical mirror array 403, the scattering layer 404, the Fresnel lens 405 and the audience 406 are arranged sequentially.
[0032] The projector emits light, and the cylindrical mirror array 403 first spreads the light in the horizontal direction, and the scattering layer 404 uses fine particles to scatter the light projected by the projector 401 to evenly distribute light energy. The role of the cylindrical lens array 403 and the scattering layer 404 is to expand the viewing angle. The Fresnel lens converts the divergent light projected from the scattering layer ...
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Abstract
The invention discloses a novel rear projection screen, which comprises a scattering layer and a Fresnel lens layer, the scattering layer is mounted close to a projector, and the Fresnel lens layer is mounted close to the audience. The novel rear projection screen is characterized in that: the light emitted by the projector is first imaged on the scattering layer, the scattering layer utilizes ultrafine particles to scatter the light projected by the projector, so that luminous energy is distributed, and thereby the screen function is fulfilled. The Fresnel lens converges the scattered light projected by the scattering layer toward the audience, so that the scattered light turns into emergent quasi-parallel light, and consequently, the brightness of the screen viewed by the audience is high and uniform at any angle. Because the grooves of the Fresnel lens and the scattering layer are not together, the single-layered rear projection screen integrated with the scattering layer and the Fresnel lens layer is low in cost, and is convenient to mount.
Description
technical field [0001] The invention relates to a new projection screen, in particular to a rear projection screen. Background technique [0002] There are two types of rear projection screens: optical rear projection screens and diffuse rear projection screens. Optical screens use fine optical structures to evenly distribute light energy to achieve screen functions, usually a combination of three optical microstructures: Fresnel lenses, cylindrical mirrors, and black stripes. Scattering screens use the scattering effect of fine particles on light to evenly distribute light energy and realize the screen function. However, the problem with the optical screen is that its structure is complex, and the cost of installation and use is too high. The problem with the diffuser screen is that the scattering particles in the diffuser screen scatters the light equally in the 4π three-dimensional space, and the main direction of the projected light entering the diffuser screen is inco...
Claims
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Application Information
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