For educational users and users with more dusty areas, before choosing a projector, they only pay attention to several mainstream indicators such as brightness, contrast, resolution, etc., and often overlook the more important for themselves. "Dustproof performance". So why pay attention to dustproof performance? What kind of harm will a projector with poor dust resistance cause to normal use? Some time ago, the Pacific projector channel and Epson and BenQ respectively dismantled the 3LCD and DLP projectors, hoping to provide some help for everyone's choice.
3LCD projector's optics are more susceptible to dust
Because the internal components are to be heat-dissipated, the inside of the projector should be well ventilated at all times. When the projector cools the fuselage at a flow rate of several tens of liters per minute, the dust enters the projection together with the circulating air. The inside of the machine. If the dust is excessively precipitated inside the electronic components, the induction is insensitive and the performance of the whole machine is degraded. If you enter the light path part, it will directly lead to the degradation of image quality or even the damage of components. In particular, LCD projection products, the liquid crystal display panel is also very easy to generate static electricity when imaging, and adsorbs tiny dust particles, thereby causing a decline in the display quality of the projector.
The color wheel of the DLP projector is still exposed
If dust enters the inner core of the projector's light path, the cost of repairs will be very high. Because many of the projector's optical path parts use package design, the damage caused by a component may be replaced by the entire optical path part, and the replacement cost of this part often accounts for half or even higher projector cost. .
Overall, the DLP projector uses a "closed optical path system", which is sealed around the optical components, making it difficult to enter dust. Of course, once it enters too much, the cost of replacement is also higher.
Harmful color wheel
Of course, the use of a closed optical channel does not mean that the DLP projector will be contaminated by dust. At work, the color wheel portion of the DLP projector is always in an unclosed state, and this part is also highly susceptible to dust over a long period of time, resulting in a deterioration in image quality.
For 3LCD projectors, dustproofing is more important, because the light path portion is not only completely sealed, but the liquid crystal display panel mentioned in the above is also very easy to generate static electricity during imaging and absorbs tiny dust particles. Do not underestimate these particles. Take the 0.9å‹ LCD panel with a standard resolution of 1024×768 as an example. Each pixel area is only 0.0007mm, and a small dust particle can easily block several pixels.
Dust is unavoidable, so what should we do after the projector is dusted? Below, the author will teach you a few practical cleaning techniques, reduce post-maintenance costs, and effectively extend the life of the projector.
Hitachi HCP-A6 projector adopts double-layer filter design
In our western and northern regions, sandstorms often occur every year from March to May, and the dust problem is very obvious. In addition, chalk dust, etc. in classrooms and other places should also be considered in the dusty areas. The dust-proof effect should be considered first, such as the product equipped with "filter", and the filter and lens should be used every month. clean. Open the inside of the projector for about half a year to do a good dust removal on the circuit board, lighting, and fan. Contact the dealer or repairer about one year to make a deep dust removal on the optical path. When dusting the projector, the most advantageous weapon is the vacuum cleaner, soft brush, and dry cotton cloth.
In fact, the projectors currently on the market (especially for the education projectors in the western region) are paying more and more attention to dustproof performance. 3LCD LCD projectors and DLP projectors have been strengthened in dust prevention, striving to provide consumers with A better product. Below we recommend several more suitable products for everyone.
First recommended for everyone is Epson's new dust-proof flagship education projector, the EB-D290, which was launched in 2009. The biggest feature of dust-proof is that the filter has a pleated design, which increases the surface area of ​​the filter. Under the action of static electricity, the adsorption capacity of fine dust particles is increased. Secondly, the joints of all the components are completely sealed to better prevent the ingress of contaminants. Compared with the previous products, these improvements can greatly improve the dustproof capacity of the projector.
The second product recommended for everyone is the Samsung SP-L300W, which uses a sliding built-in lens cap design for dust protection. This design not only protects against dust, but also meets the need to quickly switch the machine and switch screens at any time. In addition, the airtightness of the fuselage has also been enhanced, which reduces the possibility of dust entering the interior of the fuselage to some extent.
The third product recommended is the Vivitek D930TX projector. In terms of dustproof, this projector uses a fully sealed chassis lens cover and a fully sealed photoelectric system to effectively prevent dust, smoke and moisture from eroding the inside of the machine. Of course, the Vivitek D930TX projector uses a DLP optomechanical system that is more defensive against dust and easier to prevent.
The last recommended product is the Sony VPL-CX161, which uses a second-generation anti-static filter that is significantly more dust-proof than previous products. Not only can the dust blocking capacity of 2 microns be 90%, for a volume like smoke. The effective blocking capacity is also as high as 60%. In addition, the Sony CX161 is also equipped with an integrated body and all-glass lens, which is also very obvious for the improvement of dustproof performance.
Summary: Compared with the previous products, the new generation of dust-proof projectors have been enhanced in the design of filters and optical systems, so that dust can be rejected from projection. However, for a dusty projection environment, it is basically impossible to completely prevent dust, which requires the user to maintain good operating habits, and regularly perform maintenance cleaning after long-term use to ensure the projector. Stable performance and extend the life of the projector.
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