With the improvement of quality of life, many friends began to pay attention to and buy home-type miniature projectors. At present, many domestic manufacturers are doing this product, and the quality of the products as a whole is uneven. Today, the snails talked to everyone about buying homes. The five parameter points that are often overlooked during projection, where each parameter point is easier to ignore, hope that all friends can pay attention to when purchasing the micro projection.
First, lumensThe first element of a projector is its brightness, and the unit it reflects is lumens, but often in this parameter, many friends will be confused, that is, the way the business is labelled with lumens. Currently, there are two types of labeling methods for the business: 1 This is called ANSI lumens, which is directly called lumens. So what's the difference between them?
Originally, ANSI lumens were the method of measuring the projector luminous flux specified by SMPTE (The Society of Motion Picture and Television Engineering). It is widely accepted by the industry, then the value of the parameters marked in this way, the general manufacturer label will be between 250 ~ 600, some high-end products will reach 1000 ANSI lumens. In general, if you want to use a projector without pulling curtains during the day, reaching 1000 ANSI is definitely enough. (The picture below shows the effect of 1000 ANSI Lumens nut G3 daytime lights for reference!)
There may be doubts among friends here. When I was looking at a product, the above was marked with 2000 lumens. How did you do this? This is another way of saying snails need to talk about, lumens! If you write the lumens separately, the general use of ISO lumen labeling method, ISO labeling method and ANSI labeling method are to represent the brightness, essentially no difference. There is no formula for conversion between each other. However, it is generally believed that the ISO mark method measures 4 to 5 times the measured value of the ANSI mark method. In other words, if a product is labeled with 500 ANSI lumens in ANSI, it can also be labeled as 2500 lumens using ISO labeling.
Second, with the screenThe so-called "same screen" refers to the use of other devices to place its screen display content through projection. In fact, this function is very simple to say, but many friends can easily overlook this when buying. In simple terms, the more supported projection devices are, the better. For example, some well-designed products can support mobile phones and flat screens, and even connect to home consoles through HDMI cables.
With the same screen function, you can put your phone or tablet screen clearly through the projector, watching videos, playing games more refreshing! While having the same screen function, it also needs to pay attention to the convenience of the use of the same screen function. Some devices need to pass a series of tedious operations to be on the same screen, which will bring some unpleasant use. Of course, there are designs that are more humane and more thoughtful.
Under normal circumstances, heat dissipation is an intuitive concept, in other words, you can not see the heat dissipation of this device in the introduction of the business, but there are still several points to be able to distinguish whether a device's thermal design is reasonable and reliable. Many of your friends may not be concerned about the air duct design of the equipment. An excellent heat dissipation solution will have a good plan for the air inlet and outlet on the air duct design. The cold air of the cooling chip can cover the entire heat dissipation area.
Copper is usually used to conduct heat to the air outlet in the form of heat, and then use a fan to blow away heat. Here is a detail, the longer the channel formed by the cooling fins near the outlet is, the better the cooling performance is! The figure below shows the heat dissipation diagram of the nut G3. The heat dissipation design is reasonable.
Many friends may not understand the throw ratio, the throw ratio = the throw distance divided by the width of the picture. I believe that many of my friends will consider a problem when they buy a projector, that is, this projector can shoot up to a screen. Many miniature projectors can now project a 300-inch screen. What is the distance between the projector and the wall screen when projecting a 300-inch screen? This is the projection ratio can be reflected. In other words, the smaller the projection ratio, the smaller the distance from the projector screen when projecting a 300-inch screen.
Now a typical projector can achieve a projection ratio of 1.5:1, and better projectors can achieve a projection ratio of 1.2:1. As mentioned earlier, the latter (ie, 1.2:1) is larger than the screen projected by the former at the same distance. This is a key to space-limited friends! We calculate with 100-inch and 300-inch 16:9 projection screens. The 1.5:1 projector requires 3.32 meters and 9.96 meters respectively, while the 1.2:1 projector requires 2.65 meters and 7.97 meters. One of the gaps!
Many parents are reluctant to allow their children to watch too much television, because watching television for a long time will cause great damage to the eyes. This is because most TVs use direct light imaging, and the light shines directly on the eyes, so if you look at it for a long time, the eyes will feel uncomfortable.
Therefore, snails here and everyone said a technique in the micro-projection, that is, diffuse reflection imaging technology. This is actually quite understandable. Everyone can understand the picture below. Unlike specular reflection, diffuse reflection is not the direct reflection of light back, but spread out. In fact, the diffuse reflection is not too strange. The projection effect in the movie theater is diffuse reflection imaging. Therefore, we do not feel dazzling when we watch movies.
Now some of the better projectors will use diffuse reflection imaging. At present, there are some products in home micro-projection that use this technology. This is very important and it is very important for vision protection, especially for children's vision protection. This parameter can not be ignored!
Today, Snail and everyone said that the five key points in the purchase of the parameters, to do a simple summary, lumens if there is a need for daytime projection, it is best to be able to reach 800ANSI lumens brightness. The same screen function is still a key parameter for watching videos (such as self-recorded mobile video, etc.) and playing games. Friends who have this need need to pay attention. Friends who want to use the space and want to see the big screen need to pay more attention to this parameter. A device with poor heat dissipation tends to cause a lot of stuttering. The diffuse reflection imaging mode is one of the parameters that is more recommended for attention and is very important. If you have a friend who needs to buy, you can pay attention to the next nut G3, this product is very good in many details of the design and the overall effect, snail is still recommended!
Nut G3 home HD projector (1000ANSI lumens WXGA resolution Android phone with the screen) 3299 yuan The new nuts G3 follow the G1 on the pie-shaped design, with a silver-gray appearance, the overall more thin. For micro-investment, the biggest limitation is the brightness problem. The nut G3 uses OSRAM's third-generation P1A LED light source. The brightness has reached the international standard of 1000 ANSI lumens, which is a relatively high level in the same volume micro-projection, and the lamp life reaches 30000 hours. Resolution reached 1280*800, and supports Jingdong direct link to Wikipedia
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