[Home Theater Network HDAV.com.cn] I will briefly introduce the projection method, 3LCD (also known as the LCD panel, this type of projector is mainly based on Japanese) and DLP (this type is based on Texas Instruments) The processor is mainly based on Taiwan and the United States. These two have their own existence for many years. The difference between the two is only different (3LCD is better for LCD panels, DLP is better), but you must There is no comparability when it comes to a high score. The specific is to look at personal preferences and focus.
1, LCD class: Sony, Epson, Love, Panasonic, NEC, Hitachi, Sharp, Mitsubishi, Canon, ASK (American vote God), 3M, Ricoh, ACTO, InFocus, ViewSonic, Changhong, Casio
DLP class: BenQ, Lixun, Optoma, NEC, Panasonic, Acer, Mitsubishi, LG, ACTO, Sharp, InFocus, Ricoh, ViewSonic, Honghe, Zhongguang, Casio
Well, ok, here are a few simple parameters for everyone to do a science.
First, the projector resolution
The resolution of the projector is inseparable from the connected computer. The resolution is roughly as follows: SVGA (800*600), XGA (1024*768), SXGA (1280*1024), UX-GA (1600*1200), etc. Note: 1. Here 800*600 is in many projections. In the machine is the resolution that has been eliminated, and now many of the lowest resolution is 1024 * 768.
2. In fact, there is another type of projection, but this is Sony-specific and only used in Sony's top-end models, so it is not detailed here.
3. When buying, it is best to see whether it supports HD or Ultra HD, or the lowest resolution is HD and Ultra HD. This is very important!!!!
Note: 2. I will list the common resolutions.
SVGA (800*600), XGA (1024*768), WXGA (1280*800) 7, 20P (1280*720), 1080P ((1920*1080), WUXGA (1920*1200)
4:3: SVGA (800*600), XGA (1024*768)
16:9: 720P (1280*720), 1080P ((1920*1080)
16:10: WXGA (1280*800), WUXGA (1920*1200)
Second, the brightness unit of the brightness projector is: lumens.
The brightness is obtained by the average of the brightness of the nine measuring points evenly distributed on the test screen, which can accurately reflect the brightness of the projector under normal operation. Brightness is a very important performance indicator of the projector (referenced to the network) Note 1: Here to give you a simple reference resolution, the average family use 400-500 lumens per square meter, the general conference room is 700-850 lumens per square meter, the demo storefront minimum screen illumination per square meter 1000 lumens; exhibition hall or Where the brightness is higher, increase it.
Note 2: In order to calculate what kind of projector brightness to choose, I will insert a simple table size screen here.
1. Screen 4: 3
Dimensions: 100 inches (2 meters * 1.5 meters), 120 inches (2.4 meters * 1.8 meters), 150 inches (3 meters * 2 meters), 200 inches (4 meters * 3 meters)
2. Screen 16:9
Dimensions: 82 inches (1.96 m * 1.05 m), 100 inches (2.21 m * 1.24 m), 120 inches (33.31 m * 1.86 m), 150 inches (3.31 m * 1.86 m)
Choose the right machine: a simple example I am here according to the resolution of 4:3 100 inch. If it is used in a home projector (just for example, the home projector is usually 16:9 or 16:10 resolution), the 4:3 screen is 2 meters wide and 1.5 meters high, which is 3 square meters. Therefore, according to the above algorithm, the resolution is 400-500 lumens per square meter, which is 2×1.5×400 or 2×1.5×500, which is 1200-1500 lumens. The conference room is the same as 2×1.5×700 or 2×1.5×850, then it is 2100-2550 lumens. (The lumens per square meter here is not absolutely so much, just according to the general situation)
Is it not understood, hahaha?
Contrast
The contrast reflects the ratio of the brightest and darkest areas of the projected image of the projector. The contrast affects the visual effect second only to the brightness index. Generally speaking, the contrast is larger and the image is clearer. Note: Focus on 3LCD and DLP Students of the technology can find that DLP generally has a relatively high contrast ratio. Many domestic projectors have high contrast ratios, but they do not rule out the possibility of virtual standards. Insiders understand.
Bulb
Here to emphasize to everyone, Philips inside the bulb is the best. Sometimes it is okay to look at a projector manufacturer to see the light bulb directly.
Five. Special features
Now some manufacturers have developed some special functions to meet the needs of users, such as central control function, laser pointer, Chinese menu, automatic keystone correction, high-definition interface, built-in speaker, network control and so on. Some features are quite useful, and users can choose as needed. Note: Since the data is from the network, I am adding a little, now there is plug and play function, Blu-ray 3D, power-off protection, AV MUTE function, anti-theft lock protection, 12-bit 3D digital gamma correction, curved surface There are also many functions such as various energy-saving modes for calibration (in fact, many are now standard)
6. Use as a standard to classify projectors:
1. Portable projector: This is designed for customers who often carry out and use. It is characterized by small size and light weight, generally in 1KG.
2. Business, home projector: This type of projector weighs about 3Kg, the volume is general, can be fixed installation and can be placed on the table to cope with a small amount of mobile use. This type of projector is brighter than portable projectors, while The image quality of the projection is also greatly improved, and the price is moderate. The projector has flexibility in use and good cost performance.
3. Engineering Projector: This is designed for large conference centers, command centers, large lecture halls, weighing more than 10KG. Note: The main difference between engineering projectors is 1. Can change lenses: 2. Will not sell to you
4. Education Projector: This type of projector is mainly used in schools. It mainly has ultra-short focus and short focus, and the projection distance is very close. It can project 100-inch curtains at 70 cm. Ultra-short focus is mainly to avoid light pollution and reduce the damage to the eyes when the teacher lectures. Note: The main one is for educational projects. You don't buy this meaning very much, and you won't sell it to you. I won't say much.
Seven. Warranty period
The projector is generally kept for two years, and the projection bulb is generally kept for half a year. Note: We are working outside the project for three years, the light bulb is one year, (you can ignore this)
Eight. The projector can be mainly divided into two types: home video type and commercial data type.
1. The home video projector is optimized for video, which is characterized by brightness below 3000 lumens, high contrast, and the projection aspect ratio is 16:9 Note: 1. Home projector is mainly used to watch Movies, so many are based on the width and height of the movie, so they are all widescreen projectors.
2. If you choose home, pay attention to whether there is blue light function and 3D function. This function is more practical at home.
3. Choose the best home with HDMI interface, buy HD cable, then it is best to buy all copper, so the effect is good.
2. Commercial data projector mainly displays the signal output from the microcomputer, used for business presentation office and daily teaching. The brightness has different choices according to the use environment. The projection screen aspect ratio is 4:3.
Finally: 1. Now there are some laser projectors, what kind of hybrid light source projectors, here is more complicated, the price is very high, the general household will not buy me, I will not describe.
2. Speaking to everyone, 3LCD's LCD panels are produced by Sony and Epson, and DLP Texas Instruments will not say much.
3. Electronic products, such a person who sees the benevolent see wisdom, I personally feel that there is no need to buy any price/performance ratio. This kind of thing is more likely to be worse than mobile TV. You spend 2,000 yuan for half a year, others spend 6000 for two years. Let's count the things inside.
4. Dust is the biggest killer of the projector compared to the damage of the lamp, so dust is very important. If you pay for a penny, it will affect the effect of using the cheap details.
5. Now buy a projector recommended to buy a widescreen (16:9 or 16:10), after all, the projector is the output of the computer signal, the computer's general resolution is 16:9, after the widescreen will be the mainstream
6. It is recommended that you buy a big brand of projectors, after sales is very important, and some small brands are not flattering after sale.
7. Buy a home projector is best to buy white, after all, the color of your home's head is white, it is very uncoordinated to buy black.
8. When the buyer uses the machine, calculate how much screen you want to use, and then calculate the required brightness. The brightness is too high to hurt the eyes, too low and hurt the eyes. I gave the algorithm above, I will not say more.
9. Now many people ask me where the good price machine is, they feel the same. Well, 1. First of all, the quality, dustproof level: 2. Then the comfort level of use, whether it is humanized, and now some projector fan noise is very small, the disassembly machine is convenient, are small details: 3. After-sales This needless to say, everyone has used so many years of electronic products to have a deep feeling.
10. The screen size algorithm, according to the 4:3 100-inch calculation, 2 × 1.5 meters, then how big is the 120-inch screen, 2 × 1.2 is the width, 1.5 × 1.2 is high, the area is 2 × 1.2 × 1.5 ×1.2 so the 120-inch screen area is 4.32 square meters. This must be multiplied by the square!!!!!!!
11. There is no projection distance. I think this is not very useful for you. After all, the master who installed it for you will handle it for you, so I will omit it.
12. Now there is a wireless module, this is a separate purchase.
13. According to the price of general projectors, the price of commercial projectors <home projectors <education project projectors <engineering projectors
14. There are still a lot of things I haven't said, just a list of approximate parameters for your reference. All of the above are my personal understanding and do not represent the opinions of anyone else.
In the end, you always feel that the business has sold you things as if you were cheating on your money, basically not giving the business a good face. Please be kind to the sales around you, we are really hard!!!!!!!! More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), The nation's most influential home theater audio player interactive media site.
Note: This article is from what is worth buying. The article is an independent view of the author and does not represent the position of the home theater network.
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