An optical extinction reflector and a rear projection system

Abstract

The invention discloses an optical extinction reflection sheet and a rear projection system. The technical problem to be solved by the invention is that the silver-plated reflector used in the current rear projection system has low reflectivity and is easily crushed. This optical extinction reflective sheet is characterized in that it includes: (1) reflective layer, a colorless and transparent resin sheet 1 with a silver-plated surface; (2) a extinction layer comprising an ultraviolet extinction material; (3) also comprising both sides The adhesive layer I bonded to the silver-plated surface and the matte layer surface of the resin sheet I respectively. The rear projection system includes the above-mentioned optical extinction reflection sheet. All have the advantages of high reflectivity and not easy to be damaged, and can effectively eliminate ultraviolet rays and prevent damage to the human body.

Description

technical field [0001] The invention relates to an optical extinction reflective sheet with high reflectivity and capable of eliminating ultraviolet rays, in particular to a rear projection system of a large DLP splicing screen comprising the optical extinction reflective sheet. Background technique [0002] Existing mirrors are made of glass coated with reflective material on one side, usually silver-coated glass mirror or aluminum-coated glass mirror, and silver-coated glass mirror is generally float glass mirror-grade glass original sheet or polished glass coated with a A layer of silver, then a layer of copper, and then a layer of mirror back paint as a protection; aluminum-coated mirrors replace the silver layer behind the glass with an aluminum layer, but because the reflectivity of aluminum-coated mirrors is not as high as that of silver-coated mirrors, and Lace phenomenon is more likely to appear, which is commonly known as running mercury, and the reflection clarity...

AI Technical Summary

Problems solved by technology

[0002] Existing mirrors are made of glass coated with reflective material on one side, usually silver-coated glass mirror or aluminum-coated glass mirror, and silver-coated glass mirror is generally float glass mirror-grade glass original sheet or polished glass coated with a A layer of silver, then a layer of copper, and then a layer of mirror back paint as a protection; aluminum-coated mirrors replace the silver layer behind the glass with an aluminum layer, but because the reflectivity of aluminum-coated mirrors is not as high as that of silver-coated mirrors, and Lace phenomenon is more likely to appear, which is commonly known as running mercury, and the reflection clarity is also poorer than silver-plated mirrors. Therefore, nowadays, silver-coated mirrors are generally used when there are high requirements for reflectivity or clarity.

[0003] The reflectivity of silver-coated mirrors can reach 92% to 94%. Silver-coated mirrors are generally used in existing rear projection systems. However, with the development of technology and the improvement of requirements, due to the reflective effect of glass in traditional silver-coated mirrors , the reflectivity of the silver-plated mirror cannot meet this requirement, and a reflective mirror with higher requirements is urgently needed

[0004] The light emitted by the projector contains a large amount of ultraviolet rays. Since ultraviolet rays cannot pass through the glass, no ultraviolet rays will overflow the rear projection equipment and cause harm to the health of personnel. However, ultraviolet rays can pass through organic sheets or organic films , if organic film or organic film is used in the rear projection system, ultraviolet rays will pass through the reflector and cause harm to people behind the reflector

[0005] In addition, due to the glass substrate used in the silver-plated mirror, light-transmitting spots are prone to appear during the production and processing process. When reflected on the display screen, black spots will appear, which will affect the display effect; in the process of handling, it is more prone to damage. Scratches are easy to appear on the back, and when installing and debugging in rear projection systems and other equipment, it is difficult to grasp the strength of disassembly and assembly, and it is easy to crush the reflector

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