1. Space of Home Projector
The size of the space is the size of the living room, audio-visual room, and other places where you use the projector. If your living room area is more than 15 square meters, you can consider buying a projector; if it is not enough, you must carefully consider whether to buy or not.
The best distance between the projection screen and the sofa is within the range of 2-4 meters, otherwise the viewing effect will not be good and eyesight will be easily damaged.
2. Price of Home Projector
The projector price for home use has a wide gap, ranging from a few hundred to thousands, or even tens of thousands. The price of foreign brand products is higher than that of Chinese brand products. In comparison, the price of Chinese projectors is lower. For most consumers, projector products worth thousands of yuan can already meet household needs.
3. Brightness of Home Projector
Brightness is one of the most important indicators for purchasing a projector. Now the projector price is getting lower and lower, and the brightness is getting higher and higher, and 2000 lumens products have become popular. But do home projectors need such high brightness? Not necessarily!
If you look at the high-brightness projection screen for a long time, your eyesight will be damaged. In fact, in the case of low background light, projectors with hundreds or even tens of lumens can basically meet the needs. If you don't put the projection at home during the day or when the lights are bright, then a product of about 300 lumens is enough. Even if the background light is slightly brighter, there is no problem.
4. Noise of Home Projector
People who have never used a projector do not understand that the projector makes noise when it is used. Some projectors are so noisy that it is unbearable. When buying a projector, low noise should be an important factor in the purchase. However, many manufacturers have introduced low-noise projectors, and the price is not expensive.
Generally speaking, products with noise below 40dB are acceptable. But when shopping, you should listen and compare in a quiet environment to see if it will interfere with yourself.
5. Choose DLP or LED
Whether it is LED or DLP is actually not that important. What we need to notice is the effect of the projector, and the effect of a projector is inseparable from many things such as the lens, lamp, and circuit. In principle, LED projectors are the most common and the price is correspondingly lower.
The biggest advantage of the LED projector is the high utilization rate of the light source. It uses LED lights, which can individually control the brightness and contrast of each color, so it can truly reproduce various colors.
The color reproduction of DLP projector is slightly inferior. However, because the three colors of the single-chip DLP projectors are all reflected by the same micromirror to the same pixel and there is no convergence problem, so the black area is truly black, and some burrs and shadows in the LED will not appear on the edge of the pixel. Therefore, when showing some thin lines, DLP projectors are clearer and sharper than LED projectors, and have purer black and white, and richer gray levels.
Of course, the biggest advantage of a single-chip DLP projector is its small size and light weight. Many products are even only a few hundred grams. Generally speaking, DLP projectors are slightly more expensive. In short, whether it is LED or DLP, it is recommended to understand and compare carefully when buying.
6. Keystone Correction in Use of Home Projector
In the use of the projector, the position of the projector should be at right angles to the projection screen as much as possible to ensure the projection effect. If the verticality of the two cannot be guaranteed, the picture will be trapezoidal. But if it is not hoisted but placed on the table, it is difficult for us to guarantee the "vertical" effect. In this case, we need to use the "keystone correction function" to correct the trapezoid to ensure that the picture becomes a standard rectangle.
There are usually two methods of keystone correction: optical keystone correction and digital keystone correction.
Optical keystone correction: The purpose of adjusting the trapezoid is achieved by adjusting the physical position of the lens. It is also called shifting. Like the shifting lens of the camera, this correction method has no effect on the physical pixels of the picture, and the result basically does not change the picture quality. Therefore, the optical keystone correction is suitable for applications that require high image accuracy.
Digital keystone correction: The keystone correction is achieved through software. Generally, the correction range can reach more than ±15 degrees.
If you are a severe obsessive-compulsive disorder patient and neither horizontal nor vertical keystone correction can satisfy you, you can use four-corner correction to pull the picture to a standard rectangle.
7. The Selection of Projection Screen
For ordinary consumers, projection screens should be considered. Unless your wall is clean, white and spotless, it is a waste to project the home projector directly on the wall. According to the different production processes and surface coatings, projection screens are generally divided into ordinary white screens and glass bead screens.
The ordinary white screen is made by spraying white paint on the special fabric and doing simple treatment. Its characteristics are low price, wide viewing angle and soft visual effect. The disadvantage is that the light gain is small, so it is only suitable for use in homes where the background light is not strong, otherwise it needs to be used with a high-brightness projector.
The glass bead screen is made by spraying tiny glass powder on a special fabric. It has the advantages of moderate price, wide viewing angle and high gain. The disadvantage is that the price is more expensive and the color will become darker. And it should not be rolled up repeatedly at the same time, otherwise the glass beads will fall off easily and affect the use effect.
However, regardless of whether the wall is white or not, and the lighting in the home environment, it is best to use a projection screen.
According to the above criteria, choosing a home projector that suits you is very simple. Not only are they good-quality and cheap, but you can also avoid being cheated by merchants. With high-definition equipment and high-definition movies, everyone will definitely love high-definition audiovisual more and more.