#现在的投影仪能够拿来当电视用吗#
Now the clarity of the projector has come up, and the resolution of DLP 2K has reached the resolution of the TV. The brightness of the lamp projector is very good, it can easily reach more than 3000 lumens, even if the window is not closed during the day in the customer hall, it does not affect the viewing effect, and it can be used to replace the TV.
First, the advantages and disadvantages of the projector analysis
1. Commercial lamp projectors
I've been repairing the projectors of the unit, many of which are 1280*1024, or 1024*768 resolution bulb players, which are used for teaching. I also know that there is no problem with the brightness of the bulb machine, but the resolution is not enough, there is no system, the volume is large, and the lamp life is short (5000 hours), so it is not suitable for home use.
2. Portable projector
I've also repaired Philip's portable projectors, those with built-in batteries, and I've tested them. Small size, comes with a system, can be networked, play U disk movies, it is very convenient to use. However, the built-in battery capacity is too small to directly use the external power supply, which is only suitable for personal business trips to project the mobile phone signal into a large screen for viewing, and can be used as a mobile monitor.
3. Home projector
I also looked at the home projectors that are currently popular, and the LED light source is generally used, and the brightness is around 500 lumens (although it is advertised to be very high), and it is impossible to watch it without drawing the curtains during the day when watching movies at home. Therefore, brightness is the shackle of the current home projector, as long as the light source technology is improved, the brightness can reach 3000 lumens, and it will definitely replace the lamp projector.
The advantage of home projectors is that they come with their own system,Easy to operate,You can connect to the Internet,You can install APP,There is no difference between operating a TV,The clarity is generally 2K,4KThe price is relatively high。 When buying, you must pay attention to whether it is compatible with 4K or true 4K, the price difference is large.
Second, the use of projectors
Whether it is a lamp projector or a home projector, the use of DLP technology can now not worry about the impact of dust on the optical path, because the optical channel of the DLP projector has been basically sealed, the entire light source enters the DLP reflection, and finally projects from the lens, which is completely an independent optical unit and can be replaced as a whole.
Although the brightness of commercial lamp projectors is high, the heat generation is large, and the power of a lamp is generally 200-300W. The life of the bulb is shorter at about 5000 hours, and at the same time, with the accumulation of the lamp use time, the brightness of the bulb slowly dims, and the screen image will gradually become blurry, making it difficult to focus.
There is another precaution for commercial lamp projectors, that is, when the projector is brought indoors from the outdoors in winter, it cannot be turned on immediately, you should wait for an hour or two, and then turn on the power after the temperature of the projector reaches room temperature to prevent the bulb from bursting with a violent temperature difference.
The LED light source used in home projectors can reach a life of more than 20,000 hours, and it is almost impossible to consider the worry of replacing the light source.
3. Projector maintenance
Because the biggest heat generation of the projector is the bulb or LED light source, there will be a cooling fan inside the projector. After a long period of use, dust in the air will accumulate on the projector fan blades or internal air ducts, blocking air flow and affecting heat dissipation. This is also the reason why the projector will automatically shut down after a period of time after being used for a long time, and it is all turned off by overheating protection.
Commercial lamp projectors are equipped with filters at the air inlet, which can be replaced or cleaned regularly. The home projector is generally not set up with a filter, and the home environment is relatively clean, so it is good to have the ability to clean it up after two or three years of use.
Whether it is a commercial projector or a home projector, do not touch the lens with your hands when in use, so as not to leave fingerprints and affect the projection effect.
In case of emergency, the projector can be used directly on the white wall without curtains!
Fourth, the projector purchase
When buying a projector, you must buy it according to your own use, and don't buy a projector that is cheap and not suitable because you save money. For commercial meetings, you must buy a lamp projector, so that you don't buy a small and stylish home projector, which will lead to the need to close the curtains and discuss problems in the dark during meetings.
Even if the budget is not enough, buying a second-hand commercial lamp projector for one or two thousand yuan is a good choice, and now the failure rate of DLP projectors is not high, even if you use a five-year-old machine and replace a brand new bulb, the brightness and clarity are still just right. Now the price of the original lamp of the projector is not expensive, if you can change it for more than 200 yuan, you can get it.
If you are watching movies at home, you have very little time at home during the day, and you basically go home at night, so it is also a good choice to buy a fashionable and popular home LED light source projector. Of course, it is also possible to spend a small amount of money to buy a used lamp projector with a system.
If you travel a lot and need to modify files or watch movies for entertainment, you can buy a portable projector and take a large screen monitor with you on the go.