Aunt Zhang had been referring to the projector for a long time ago. I actually wanted to write a popular science post for the projector to make a (deception) reference (gold) exam (currency).
About the projection method I will briefly introduce, 3LCD (also known as the usual liquid crystal panels, this type of projector is mainly Japanese-based) and DLP (this type is the use of Texas Instruments processor, mainly Taiwan and the United States for the The Lord), both of which have their own merits and demerits, exist for many years. The focus between the two is different (3LCD is a better LCD panel and DLP is better). However, if you have to distinguish yourself, there is no comparability. of. Specific or personal preference and focus.
1. LCD category: Sony, Epson, Aiqi, Panasonic, NEC, Hitachi, Sharp, Mitsubishi, Canon, ASK (3), Ricoh, Arto, InFocus, ViewSonic, Changhong, Casio
DLP categories: BenQ, Vivitek, Optoma, NEC, Panasonic, Acer, Mitsubishi, LG, Arto, Sharp, InFocus, Ricoh, ViewSonic, Honghe, China Optics, Casio
(Because the internal data regulations can't be used, so the bold black fonts are quoted on the Internet, and some of the points on the Internet are more comprehensive for everyone to introduce. The following notes “note†is my own modification and Add a bit of your own understanding)
Um, well, here are a few simple parameters for everyone to make a popular science.
First, the projector resolutionNote: 1. Here 800*600 is a resolution that has been eliminated in many projectors. Now many of the minimum resolutions are 1024*768.
2. In fact, there is another type of projection but this is Sony-specific and only used in Sony's most high-end models, so not described in detail here.
3. The best time to buy is to see if it supports HD or Ultra HD, or if the minimum resolution is HD and Ultra HD. This is very important! ! ! !
Note: 2. I listed the common resolution
SVGA (800600), XGA (1024768), WXGA (1280800) 7, 20P (1280720), 1080P ((19201080), WUXGA (19201200)
4:3: SVGA (800600), XGA (1024768)
16:9: 720P (1280720), 1080P ((19201080)
16:10: WXGA (1280800), WUXGA (19201200)
Second, the brightness of the brightness of the projector units: lumens.Note 1: Here we give you a simple reference resolution, the average home use 400-500 lumens per square meter can be, the general meeting room at 700-850 lumens per square meter, the demonstration of the minimum screen brightness per square meter of 1000 lumens; Exhibition halls or places with higher brightness should be increased.
Note 2: In order to facilitate the selection of what kind of projector brightness, I insert here a simple form of screen size
1. Screen 4:3
Size: 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
Size: 82 inches (1.96 meters 1.05 meters), 100 inches (2.21 meters 1.24 meters), 120 inches (33.31 meters 1.86 meters), 150 inches (3.31 meters 1.86 meters)
Choose the right machine: a simple example I am here according to the 4:3 resolution 100-inch. If it is used in a home projector (for example, home projectors are generally 16:9 or 16:10 resolution), the 4:3 curtain is 2 meters wide and 1.5 meters high, which is 3 square meters. So the resolution according to the above algorithm 400-500 lumens per square meter home, then it is 2 × 1.5 × 400 or 2 × 1.5 × 500 then it is 1200-1500 lumens. In the same way as the conference room, 2 x 1.5 x 700 or 2 x 1.5 x 850, then 2100-2550 lumens. (Here, the lumens per square meter are not absolutely so much, just according to the general situation)
Does not understand, hahaha
Note: Students who are concerned about 3LCD and DLP technology can find that DLP is generally relatively high in contrast. Many projectors in China have high contrast, but they do not rule out the possibility of falsification. Insiders understand.
Four. BulbHere to emphasize to everyone, Philips is the best light bulb. Sometimes looking at a projector manufacturer is not a direct look at a light bulb.
V. Special featuresNote: Since the data is from the network, I will add a little bit. Now there are plug and play functions, Blu-ray 3D, power off protection, AV MUTE function, anti-theft lock protection function, 12-bit 3D digital gamma correction, surface Calibration also has various energy saving modes and many other features (actually many are now standard)
6. Usage As a standard, classify projectors:
Note: The main difference of the projector is 1. Can change the lens: 2. Will not be sold to you
Note: It is mainly used for educational projects. The meaning of your purchase is not great, and it will not be sold to you. I will not say more.
Note: The project we do outside is generally three years for the host and one year for the light bulb (you can ignore this)
8. The projector can be mainly divided into two types: home video and commercial data.Note: 1. Home projectors are mainly used for watching 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 no Blu-ray function and 3D function, this function is more practical at home
3. Choose the best home with HDMI interface, buy HD lines, then the best buy full copper, so that the effect is good.
Finally: 1. What laser projectors are there now and what hybrid light source projectors are there? It's more complicated to say here, the prices are higher, and the average household will not buy me.
2. In order to give you a little in vitro words, all LCD panels of 3LCD are produced by Sony and Epson, and DLP Texas Instruments will not say much.
3. Electronics This kind of thing is a bewildering wise man, I personally feel that there is no need to buy what cost, projector is more likely to be worse than mobile TV, you spend 2000 dollars for half a year, others spend 6000 for 2 years , This stuff will count it yourself.
4. Compared to the damage of the bulb, dust is the biggest killer of the projector, so dust is very important. A penny and a piece of goods, cheating on the details of cheap things can affect the use of results.
5. Buy a projector now to buy a widescreen (16:9 or 16:10), after all, the projector is the output of the computer signal, the general resolution of the computer is 16:9, after the widescreen will be the mainstream
6. It is recommended that you buy a large brand of projectors, after sales is very important, and some small brands do not dare to compliment after sales.
7. Buy a home projector is best to buy white, after all, the color of your home's head is white, buy black is very uncoordinated.
8. When the buyer uses the machine, count how much curtain you want to use, and then calculate the required brightness. The brightness is too high to hurt the eyes, too low to hurt the eyes. Given the algorithm above, I will not say more.
9. Now many people ask me where good machines are good and they feel the same. Well, 1. The first is the quality, dust-proof level: 2. Then the use of comfort, whether humane, and now some projector fan noise is very small, disassemble the machine is convenient, are small details: 3. After sales Needless to say, everyone has used this electronic product for so many years.
10. The screen size algorithm, according to 4:3 100-inch calculation, 2 × 1.5 meters, then the 120-inch screen is how much, 2 × 1.2 is the width, 1.5 × 1.2 is high, the area is 2 × 1.2 × 1.5 ×1.2 The 120-inch screen area is 4.32 square meters. It must be multiplied by square! ! ! ! ! ! !
11. This does not say there is a projection distance, I think this is not very useful for you to say, after all, the master installed to you is to give you a good deal, so I will omit.
12. There are now wireless modules, which are purchased separately.
13. According to the price of general projector, the price of commercial projector <Home projector <Education project projector <Engineering projector
14. There are many things I haven't said yet, just give you a rough list of parameters for your reference. The above is my personal understanding and does not represent the opinions of any other person.
At the end of the day, you always feel that the merchant is selling you something like you are cheating on your money. It basically doesn't give the business a good look. Please be kind to the sales around you. We are really hard! ! ! ! ! ! ! !
