Be Careful! How to Distinguish the True and False of Projection Screen!
be careful! How to distinguish the true and false of projection screen!
On the surface of the projection screen, there seems to be no advanced technology, but there are still many doorways on its thin screen. In the process of communicating with many screen enterprises and users, we found that although there are many screen quality, there are frequent phenomena of confusing the real with the false, replacing the good with the bad, and brand confusion. These problems not only seriously harm the interests of consumers, but also seriously damage the brand and image of enterprises. Many users reported that most brands were counterfeited. For example, there were illegal dealers who used domestic products to pretend to be the screen of Meishi Jingying, including dile, Hongye, snow white and other screens. In this issue, we will explain the screen from two categories: front projection screen and rear projection screen, so as to provide readers with better methods to distinguish the authenticity, advantages and disadvantages of the screen.
Both appearance and connotationCommon forward projection screens mainly include white plastic screen, glass bead screen and metal screen. In the teaching process, the most used glass bead screen should be the glass bead screen. We will introduce the glass bead screen from the back cloth base, surface materials, modeling, environmental protection, cost performance and sales channels.The cloth base material on the back of the high-quality screen is relatively flexible, relatively flat as a whole, and the glass and fiber materials can play the effect of flame retardant. The overall structure is distributed horizontally and longitudinally and is not easy to deform. Low quality and shoddy screens usually have a soft screen base, which is easy to curl after a period of time, and they are not flame retardant. The teacher looked carefully at the back of the curtain to see the difference.
The fineness of glass beads on the screen surface and the coating process will directly affect the graininess and noise of the image. One thing we should pay special attention to is that the curtain with rough hand feel is not inferior, and the curtain with fine hand feel may not be of high quality. Most of the domestic screens feel more delicate because most of the glass beads are embedded in the curtain, while the imported screens are made more carefully, and most of the glass bead crystals are exposed outside, so the feel is relatively rough. According to experts, one third of the glass bead crystals are embedded in the curtain, and their reflection, refraction, gain and viewing angle effects are the best. Therefore, the feel of high-quality screen is rough, while the feel of low-quality screen is delicate. High quality screens can also prevent mildew and discoloration. At the same time, some high-quality screens will also add appropriate black glass beads, which can eliminate the flickering phenomenon and protect the eyes. The inferior screen is usually bright and moldy, and will turn yellow after long-term use.
In terms of brand appearance, the high-quality screen has strong motor power and durability, the self-locking system and performance of the rotating shaft have higher operability, and different brands have their own unique trademarks and shapes. It is understood that each brand has its own logo printed on the plastic shell at the left and right ends of the screen, and the shell also adopts different materials. The shell has a quality assurance mark (quality assurance words and product identification code) and can query the authenticity and situation of the screen from the manufacturer through the identification code. In our sample collection, we learned that the logo of "Snow White" is printed on the plastic shell at both ends of the snow white screen, and the three-year warranty mark is pasted on the right end of the aluminum alloy shell. You can inquire the manufacturer about the authenticity and other information of the screen through the identification code.
Environmental protection screen usually refers to the screen whose formaldehyde content (mg / kg) detection value is 75 standard, while the detection content value of high-quality screen is less than 75. Only white snow (Shenzhen) projection screen Co., Ltd. provided us with the test report, and the display data was
For your benefit, please recognize the brand and trademark when purchasing the screen, and try to buy it from the screen company's offices all over the country or its designated authorized agents.
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