How to set up a home theater home projector purchase guide

For ordinary people who don't know much about home theater and don't know about audio-visual equipment, how to buy a home theater projector seems daunting. There are many models to choose from at the time of purchase, each model has its own unique advantages and disadvantages, but the buyer claims that each function is "correct". It's critical to simplify the process to determine what you need and then find the standard projector that suits you. In order to find a suitable home theater video projector, the following small series talk about four items that should be paid attention to when purchasing a home projector:

1, resolution and aspect ratio

Buy a home projector, of course, to buy affordable and real models, so be sure to know which parameters will be linked to the price. The resolution we have mentioned below has a lot to do with the price of the projector. The higher the resolution, the clearer the image of the projector, and of course the higher the price. In the long run, if economic conditions permit, it is best to buy a projector with a physical resolution of XGA, which shows a clearer and brighter effect. But for the home, the current SVGA projector can meet the needs of most people. It is worth reminding that when purchasing a projector, it is necessary to distinguish between standard resolution and maximum resolution. The standard resolution is the resolution when the projector normally displays the output, and the maximum resolution is supported by the projector. The maximum resolution of the device, that is to say, if you purchase a projector with a maximum resolution of 1024×768 and a real resolution of 800×600, the screen displays 800×600.

In addition, when purchasing a projector, you must ask whether the projector's true projection ratio is 4:3 or 16:9. Most DVD sources now use the "16:9 variable wide screen" mode, followed by The HD standard requires a TV screen with an aspect ratio of 16:9, and a home projector ratio of 16:9 will follow the trend.

2, brightness and contrast parameters

Many friends ask whether the higher the brightness, the better. When you buy a business machine, if you buy a business machine, of course, the higher the brightness, the better, because the business environment is large, and the light is strong. It is not the same. For individual users, it is not a good thing to be too bright. Because the user's use area is much smaller, the indoor shading conditions are better, and the too bright projection picture makes people feel glaring and even damage the eyes. The area of the general household user's use environment, if it is 20 to 50 square meters, the average brightness of home projectors is around 800 lumens to 1200 lumens. Therefore, when purchasing a projector, considering the size of the brightness has no essential meaning, and the brightness is negligible at the time of purchase.

Regarding contrast, that is the higher the better. The higher the contrast, the sharper the image, the brighter the color, and the better the details. In terms of contrast performance, DLP has an inherent advantage over LCD. However, if you like to enjoy the big picture for a long time without wanting to cause visual fatigue, the low-contrast model is a more ideal choice. This type of machine is mainly based on LCD technology projector.

3. Installation flexibility and its importance

Zoom range

The zoom lens can be made to enlarge or reduce the projected image of the internal optical element of the lens. This allows the projector to provide a distance from the image size required within the throwing range. Some projectors have a very limited zoom range. For example, a 1.20:1 lens, sometimes said to be 1.2 times, means that the maximum image size is only 20%. On the other hand, some projection lenses are 2.0:1 zoom, or 2.0 times, which means twice the size of the smallest image. Such a lens provides more flexibility to create the size of the image you want from where you want to find the projection you want.

Although the long zoom range provides great flexibility, the projector's light output potential is reduced, usually if you use a long zoom lens to stretch, the brightness will lose 25% to 45%, so when When using far projection, this means that the projected brightness will lose half of the center light source. If you want to maximize light output, it's best to avoid long shots.

So when you buy, you must consider the size of the room, determine how big the image is to be projected, and only then will you not spend more.

Lens shift

Another feature makes the installation easier to be displaced by the lens. The lens shift is the ability to move the projected image up or down, left or right while keeping the projector fixed. This makes it a lot easier for the projector to be where you want it, and to adjust the lens to make the image fit the screen perfectly. If you don't have any lens shifting features, you will need to take extreme care to accurately position the projector to throw its fixed angle.

If the projector does not have a lens shift, one option is a tilted projector, such an image fills the screen where the projector is placed. However, this will result in a trapezoidal image. You can use it for trapezoidal correction, but this is something you should try to avoid. Keystone correction causes the projector to display images using fewer pixels, which will cause the projected scaled picture to fit into the new smaller pixel matrix. This eliminates some of the benefits of using a high-definition projector, that is, the local HD signal display, resulting in the highest detail and clarity.

The vertical lens shifts, the projected image moves up and down, allowing the projector to be placed at different heights and still correctly illuminate the screen. The different shift ranges are within the appropriate range of height from the projector to the height of the half screen, at a maximum of approximately 3 screen heights. If you plan to install the shelf after the projector so that the projector is about the same height as the screen projector, you only need a gentle lens shift range. On the other hand, if you plan to install your projector ceiling and let it drop images down to the screen, or use a high rear shelf, a wider range of vertical lens shifts is required. If there is no lens shift, sometimes it can be installed at the exact position determined by the ceiling, the angle of the projector's fixed input. However, this often requires a distance from the ceiling using the drop tube to reach the height of your preferred projector screen.

The horizontal lens shifts the projected image from one side to the other, causing the projector to be placed horiontally off-center from the screen. While horizontal lens shifting is usually not a vertical variation in its wide range, it allows for certain motions, which is the key place if you can't follow the projector in the center of your screen. The horizontal lens shift can be changed by more than 5% of the width of the 50 1 projection image, which is less common than vertical shifting.

4. Your budget

Many friends have asked the price of home projectors to choose. In fact, the price of home projectors varies greatly, from 10,000 yuan to 50,000 yuan, or even higher. In general, the prices of European, American and Japanese branded products are slightly higher, and the prices of domestic and Taiwanese brands are lower. For most consumers, a full HD product of around 10,000 yuan can meet the needs of the home. The projector has a high profit. It can definitely be bargained at the time of purchase. Generally, the product is priced at more than 10,000 yuan. It is no problem to cut 5%.

For the projector, the bulb is its heart. The length of the bulb directly affects the cost of the projector. The cost of replacing the bulb is quite expensive, so it is best for the home consumer to choose a long-life bulb when purchasing the projector. . There are three kinds of projection bulbs on the market. The first one is metal halogen bulbs. The price is cheap, the service life is short, generally only about 2000 hours. The second type is UHE bulbs, which is the most commonly used one on the market and has a long service life. , usually can reach 3,000 hours or so, the price is more realistic; the third is a long-life UHP bulb, the life expectancy can generally reach 4000--5000 hours, the price is the most expensive of the three. How to choose a light bulb, then you look at the money bag. More home theater knowledge is available in the Chinese home theater network, welcome to pay attention to the official micro-signal of the home theater network: cnhifi.