In recent years, projectors have become more and more popular with young people, replacing TV and becoming the protagonist in the living room and bedroom.
There are some reasons why buying a project is more worthwhile than buying a TV.
First of all, the screen of the projector is bigger than TV, bringing a better audio-visual feeling.
On top of this，TV can only be fixed in. Before buying a TV or having a decoration, you have to think about the TV location. However，the projector can not only be conveniently put in any position in the home, but also receive up very convenient，avoiding occupying space. Therefore，The projector can be used for conference office or classroom teaching while satisfying the home use.
Thirdly，the disadvantage of TV is that the TV screen shoots directly into people’s eyes, which is bad for eyesight, while the projector enters people’s eyes through wall or curtain diffuse reflection, which can better protect eyesight like ordinary natural light.
Lastly，the price of projector is generally lower than that of TV. And using the projector, we can enjoy the cinema-level large screen visual experience at home. The price of large screen TV is high, which is difficult for ordinary people to accept.
However，what kind of aspects should we focus on while purchasing a projector？Here are some key points that I had listed, which may help a lot.
- True brightness
This is the most important parameter. There is a saying that goes that brightness conceals all ugliness, which affects whether the picture can be seen clearly and what kind of environment (especially during the day) is needed to see clearly. The picture details have levels and also need brightness to ensure. If you need to see a projector in the living room during the day, you need a projector of at least 2000ansi to ensure the visibility of the picture. The international standard is based on ANSI lumen. The lumen brightness claimed by general businesses is actually the light source lumen. Roughly divided by about 2.8.
- Resolution
Standard resolution and maximum compatible resolution can be seen in the product specifications. The standard resolution is the resolution of the screen, which can be seen by our eyes. The maximum compatible resolution is the maximum resolution that can be compatible with the display, which will be much larger than the standard resolution. The standard resolution, more important, determines the imaging effect.
- Imaging technology
LCD, liquid crystal display, controls the rotation direction of liquid crystal molecules through the change of signal and voltage on TFT, so as to control whether the polarized light of each pixel is emitted or not
DLP, digital light processing, is digital light processing, that is, this technology needs to digitally process the image signal first, and then project the light. It is a highly reliable all digital display technology, which can provide the best image effect in various products, such as large screen digital TV, company，home，professional conference projector and digital camera (DLP cinema).
DLP projector has higher brightness and higher price. While LCD projector has better color and lower price.
- Projection ratio
Let’s start with the conclusion that the smaller the projection ratio, the better. The smaller the distance, the larger the size can be projected. Of course, the better things are, the more expensive they are. If you choose a cost-effective projector according to your own needs, you need to consider more.
Projection ratio = projection distance / picture width. For example, if you want to cast a 100 inch screen within 3 meters, if the screen is 16:9, apply the above formula: Projection ratio = 3m / (100×0.0254×0.87) M = 1.36, select the projector with projection ratio less than or equal to 1.36.
- Chip
DMD chip size determines the upper limit of brightness, can carry greater light flux, and is better in real brightness and picture details. Generally speaking, the larger the number on the model, the better. For example, 0.33 “DMD is better than 0.23” DMD
- The Technology of Quad-display
HDR decoding is the abbreviation for high dynamic range, which means “high dynamic range”. It is to make the details of the highlight or shadow part of the picture clearer, make the picture brighter but not exposed in the bright part, and make the dark part deeper but still fine in detail.
Left and right trapezoidal correction is an indispensable function. The projector should be at right angles to the projection screen as far as possible to ensure the projection effect. Because most of the time our projector is not installed in the middle of the screen, you may put it on the side of the bedside, so the projected picture is an oblique trapezoid. In this case, the user needs to use the “trapezoid correction function” to correct the trapezoid to ensure that the picture becomes a standard rectangular shape.
The dynamic image system is used to insert a motion compensation frame between the traditional two images to improve the refresh rate. It can make the moving picture clearer and smoother, which is better than the normal response effect, so as to remove the residual image of the previous frame.
The automatic focusing system avoids the phenomenon of thermal defocus and makes the picture clear and sharp at all times. Now there is generally autofocus.
- light source
Cheap or early projectors used light bulbs because of their low cost and high brightness.
At present, the mainstream intelligent projectors use LED as the light source, and with the development of technology, the brightness is basically close to the light bulb machine, and the image quality is also very good; The contrast of the bulb is good. Due to the obvious high temperature, the service life will be shorter, and the after-sales maintenance cost is high. It takes hundreds of yuan to replace it. Therefore, you will see that the traditional projector using the bulb is for heat dissipation. Many fence holes are often designed in the appearance to ensure normal long-term use.
The latest technology trend is to use laser as light source, which is common in medium and high-end products. Laser light source has the advantages of high brightness and long service life. The brightness of general household laser projector can be more than 2000 ANSI lumens. And you don’t have to worry about its life at all, so if you like users watching plays in the brighter living room, the laser projector is very suitable for you.
