Education is the pillar of the projection market, dust prevention should be paid more attention
With the strengthening of the country's investment in education informatization, various universities, technical colleges and even primary and secondary schools have been equipped with electronic classrooms with more complete hardware facilities. The projector has also become one of the indispensable equipment in the electronic classroom. However, due to the peculiarities of the education industry, when purchasing products, it presents some different characteristics from other industries. Because there are many restrictions on the height and area of u200bu200bthe electronic classroom. For example, the floor height is often within 3 meters, and the area is often no greater than 100 square meters. Although ordinary telephoto projectors can be installed on the ceiling to avoid occupying too much classroom space, because the ceiling is too high, it will often directly hit the speaker's glasses. Or the back view is projected onto the screen, which brings great inconvenience to the teaching. The short throw projector avoids these problems. This type of projector can project a screen of about 80-120 inches in a short distance (about 0.8-1.5 meters). Due to the shortened distance, it also avoids the problem of directing the speaker's glasses. According to data from relevant survey agencies, the share of short-throw projector products in the education market in 2011 has increased significantly compared to 2009 and 2010. A survey conducted by CCID.com on 150 primary and secondary schools that are planning to purchase projectors for electronic classrooms also shows that 82 companies are planning to purchase short-throw projectors, accounting for 55% of the total. And it is foreseeable that in the next few years, the market share of short-focus products will continue to grow. When educating users to purchase projectors in the past few years, due to lack of experience, they tend to pay more attention to high parameters when prices are similar. One of the most concerned parameters is the brightness of the bulb. Therefore, the brightness of projector products has been increasing year by year when purchasing. This is actually a misunderstanding. First of all, in addition to power consumption, excessive brightness will form a huge contrast with the surrounding environment when the classroom is completely dark. This will damage the eyesight of the user to a certain extent. After a few years, the school now has a more rational attitude when purchasing products and no longer blindly pursues high parameters. Instead, it purchases according to the needs of the classroom, which not only saves energy and has a better effect, but also protects the eyesight of the users. The projector has strict requirements for the environment. If the dustproof function of the projector is not strong, it will bring too much dust into the air path or even the light path of the projector. The brightness and life of the machine have a great influence. In our country, there are many cases of damage to the firmware of projector products due to dust. Especially in some second- and third-tier cities, the damage to projector products is more serious due to the larger dust. Regarding this point, the advice given by experts is that it is best to pay more attention to its filter design when purchasing products. Generally speaking, the larger the filter area, the better the dust protection of the projector.