Rear projection apparatus

A rear projection and lens technology, which is applied in the field of projection devices, can solve the problems of uneven mixing, poor quality, loss of color reproduction, etc., and achieve the effects of diffusing viewing angles, increasing viewing angles, and improving light utilization and contrast ratios

Inactive Publication Date: 2017-10-24
PROBRIGHT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to the increasing popularity of multimedia marketing and large panel technology in recent years, traditional large advertising billboards have been gradually replaced by large display screens. However, the existing large display screens are often unable to effectively expand the viewing range due to their total reflection structure. Angle, improve resolution, contrast, gain effects
[0003] Among them, the additives used in the screen in the past are often filled in a mixed way with pla

Method used

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Example Embodiment

[0031] Please refer to the figures, figure 1 It is a schematic diagram of the rear projection device of the present invention. As shown in the figure, it includes a first lens 100 and a second lens 200. The first lens 100 is a Fresnel lens, and the distance between the Fresnel lenses is 50-150um. In between, the second lens 200 is disposed at a distance from the first lens 100, and a scattering layer 210, a diffusion layer 220, a reflection layer 230, a light absorption layer 240, and an adhesive layer 300 are sequentially disposed on the 2 surfaces of the second lens. An adhesive layer 300 is provided between the scattering layer 210 and the diffusion layer 220, an adhesive layer 300 is provided between the diffusion layer 220 and the reflective layer 230, and an adhesive layer 300 is provided between the reflective layer 230 and the light absorption layer 240.

[0032] Please refer to the figures, figure 2 It is a schematic diagram of another rear projection device of the prese...

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Abstract

The invention provides a rear projection apparatus comprising a first lens and a second lens. The second lens consists of a scattering layer, a diffusion layer, a reflective layer, and a light absorbing layer. The scattering layer has a curved-body structure to realize penetration and scattering of light to increase a visual angle. The reflective layer uses a groove structure filled with a light-absorption filling material to absorb ambient light and enhance the contrast ratio of the screen. Besides, because of astigmatic particles in the diffusion layer and light absorbing particles in the light absorbing layer, a problem of poor color rendition effect caused by non-uniform material mixing and high optical losses because of the interactive influence of the astigmatic particles and the light absorbing particles is solved.

Description

technical field [0001] The present invention relates to a projection device, especially a rear projection device applicable to large-size display equipment. Background technique [0002] Due to the increasing popularity of multimedia marketing and large panel technology in recent years, traditional large advertising billboards have been gradually replaced by large display screens. However, the existing large display screens are often unable to effectively expand the viewing range due to their total reflection structure. Angle, improve resolution, contrast, gain effects. [0003] Among them, the additives used in the screen in the past are often filled in a mixed way with plastics, so it is easy to cause problems such as uneven material mixing, uneven material plate, light loss, and poor color reproduction, especially when black It is most obvious when the light-absorbing particles and scattering particles are mixed into the same layer structure. [0004] It can be seen tha...

Claims

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Application Information

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IPC IPC(8): G03B21/602
CPCG03B21/602
Inventor 谢浩森王茂贵刘柏廷李嘉彬
Owner PROBRIGHT TECH
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