It seems daunting to buy a home theater projector. At the time of purchase, there will be many models to choose from, each model has its own unique advantages and disadvantages, but the buyer claims that each of their functions is "correct". After simplifying the procedure to determine what you need, then finding the standard projector that suits you is the key. In order to find a suitable home theater video projector, the following should pay attention to when buying a home projector.
1. Resolution and screen ratio
Buy a home projector, of course, to buy affordable and real models, so it must be clear which parameters will be linked to the price. The resolution we mentioned below has a great relationship with the price of the projector. The higher the resolution, the clearer the projector's image, and of course the higher the price. From a long-term perspective, if economic conditions permit, it is best to buy a projector with a physical resolution of XGA, which displays a clearer and brighter effect. But for home, the current SVGA projector can fully meet the needs of most people. It is worth reminding that when purchasing a projector, you must distinguish between the standard resolution and the maximum resolution. The standard resolution is the resolution when the projector normally displays the output, and the maximum resolution is the external resolution supported by the projector. The maximum resolution of the device, that is, if you purchase a projector with a maximum resolution of 1024 & TImes; 768, and a true resolution of 800 & TImes; 600, the screen shows 800 & TImes; 600.
In addition, you must ask clearly when purchasing a projector. The true projection ratio of the projector is 4: 3 or 16: 9. Most DVD sources today use the "16: 9 variable wide screen" mode, followed by The high-definition standard requires the TV screen to have an aspect ratio of 16: 9, and the ratio of home projectors to 16: 9 will follow the trend.
2. Brightness and contrast
Many friends have asked whether the higher the brightness when buying a projector, the better? In fact, if you are buying a business machine, of course, the higher the brightness, the better, because the business environment is large and the light is strong. Is different. For individual users, too bright is not necessarily a good thing. Due to the much smaller area of ​​use for individual users, the indoor shading conditions are better, and the projection screen is too bright, but it makes people feel dazzling, even causing damage to the eyes. For general household users, if the area of ​​use is between 20 and 50 square meters, the brightness of a typical home projector is around 800 lumens to 1200 lumens. Therefore, when purchasing a projector, considering the size of the brightness is not essential, and the brightness can be ignored when buying.
Regarding contrast, that is the higher the better. The higher the contrast, the clearer and more conspicuous the image, the bright colors are bright, and the details show a good effect. 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 easily causing visual fatigue, the low-contrast model is a more ideal choice. This model is mainly based on the LCD technology projector.
3. Installation flexibility and its importance
Zoom range
The zoom lens can enlarge or reduce the projected image of the internal optical elements of the lens. This allows the projector to provide the required image size distance from 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 minimum image size. Such a lens provides more flexibility to create the size of the image you want from the projection you want to find where you want.
Although the long zoom range provides great flexibility, the light output potential of the projector will be reduced. Generally, if you use a long zoom lens to zoom, the brightness will lose 25% to 45%, so when When using long projection, this means that the projection brightness will lose half of the central light source. If you want to maximize light output, it is best to avoid using long lens projections.
Therefore, you must consider the size of the room when you buy, and determine how big the image is to project, so that you will not spend more money.
Lens shift
Another function makes the installation easier to be shifted by the lens. 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 great projector to make it easier when you want it, and adjust the lens to make the image fit the screen perfectly. If you do not have any lens shift function, you will need to take extreme care to accurately position the projector and throw it at a fixed angle.
If the projector does not have a lens shift, one option is to tilt the projector so that the projector is placed where such an image fills the screen. 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 allows the projector to use fewer pixels to display the image, which will cause the projection to scale the picture to fit the new smaller pixel matrix. This eliminates some of the benefits of using a high-definition projector, that is, the local high-definition signal display, caused at the highest detail and clarity.
The vertical lens shifts and the projected image moves up and down so that the projector is placed at different heights and the screen is still properly lit. The different shift ranges are set by the projector from a moderate range of half-screen heights to a maximum of about 3 screen heights. If you plan to install it on the shelf 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 throw the image down onto the screen, or use a high rear shelf, a wider vertical lens shift range is required. If there is no lens shift, sometimes it can be installed at the exact position determined by the ceiling, the fixed input angle of the projector. However, this often requires a distance from the ceiling using a drop pipe to reach the height of your preferred projection screen.
The horizontal lens shift moves the projected image from one side to the other, causing the projector to be placed horingtally off-center from the screen. Although horizontal lens shift is usually not a wide vertical change in its range, it allows certain movements, which is the key place if you cannot follow the projector in the center of your screen. Horizontal lens shift can change the width of the projected image by more than 5% 50%, which is less common than vertical shift.
4. Cost issues
Many friends have asked what price is generally selected for home projectors? In fact, the price of home projectors varies greatly, from 10,000 to 50,000 yuan, or even higher. Generally speaking, the prices of European, American and Japanese brand products are slightly higher, while the prices of domestic and Taiwanese brand products are lower. For most consumers, a full HD product of about 10,000 yuan can meet household needs. The profit of the projector is high, and it can definitely be bargained at the time of purchase. Generally, products with a price of more than 10,000 yuan, it is no problem to cut 5%.
For the projector, the lamp is its heart. The life of the lamp directly affects the cost of using the projector. The cost of replacing the lamp is quite expensive, so it is best for household consumers to choose a long-life lamp when purchasing a projector . There are three kinds of projection bulbs on the market. The first is a metal halogen bulb, which is relatively cheap and has a short service life, generally only about 2,000 hours; the second is a UHE bulb, which is the most commonly used one on the market at present and has a long life , Usually can reach about 3000 hours, the price is relatively real; the third is the ultra-long life UHP bulb, life can generally reach 4000-5000 hours, the price is the most expensive of the three. How to choose the light bulb, then you will look at the money bag.
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