Of course, everyone is not a professional, so professional tools like illuminance meter and color adjuster are not because the price of buying a good illuminometer is more expensive than entry-level projectors because we don’t have to do such tests. Because of the difference in brightness between a projector's 2,500 lumens and 2,490 lumens, it does not affect the actual use. The contrast ratio is 2000:1 or 1999:1 and can't be distinguished by the naked eye.
Therefore, the tools introduced today, without paying a lot of money, can assess whether a projector can meet the demand, gossip less, let's enter the theme.
Simple tool hand and business card
I didn't think of it, the hand and the business card could even become the tool for the performance test of the projector. Let us first talk about the hand, what role can the hand play when the projector is purchased? The easiest is the weight and temperature of the test. We don’t say everyone knows, let’s say something you don’t know. Test the projector image rainbow problem.
Anyone who knows about the projector knows that DLP projectors always have a "rainbow" problem because of structural problems. The so-called "rainbow" is because the speed of the color wheel in the DLP projector is too low, resulting in some fast When the image is switched, the color is separated, and the color of the rainbow is seen in the user's glasses. The "rainbow" appears in front of the eyes, although it sounds wonderful, but when it is really used, the feeling of use is very unpleasant.
The DLP projector that was introduced as much as possible speeds up the speed of the color wheel and solves this problem within a certain range. However, on the lower-end DLP projector, such a problem still exists. When selecting a DLP projector, the user can put the five fingers together, then block in front of the eyes, first wave up and down with a slower frequency, and then gradually speed up. If you have never seen a rainbow appear, congratulations on this projector. The color wheel is in place.
Below, let's talk about the role of the business card, whether the projector image is clear, not only depends on the resolution of the projector, but also depends on the effect of the lens focus, with a white business card, the horizontal block in the middle of the font, you can clearly see whether the text is There is a ghost image, let people gently adjust the lens focus ring, if you can get the effect of no ghosting, congratulations again, this projector's lens group is very reliable.
Starter Tool DisplayXThe two so-called tools just now are actually our appetizers today. The following tools are professional supplies. DisplayX's Chinese name is the Display Test Wizard, which helps users easily detect projector contrast, color transitions, color purity, etc., which we often need to consider when selecting projectors.
DisplayX software main interface
When using DisplayX to detect the projector, the more important items are contrast test, 256-level grayscale, color and solid color.
256-level grayscale test chart 
Color transition test chart
Contrast test chart
If you are purchasing an LCD projector, you can also do a delay time test. The small squares in the picture are not optimal.
LCD projector display demonstration test tool
Advanced tool NOKIA ntest
Ntest ​​is more professional than the DisplayX just mentioned, but it is not a good thing to be too professional. This software is completely in English, so it may be more troublesome to use, but it doesn't matter. I will translate it for you here today.
NOKIA ntest main interface
In the lower center of the main interface, there are 15 options, namely Geometry, Brightness and contrast, High Voltage, WWW, Colors, To control panel/display. Control panel display properties), Help, Convergence, Focus, Resolution, Moire, Readability, Jitter, Sound, Quit (exit).
In order to make the test more accurate, we need to do some preparatory work. Before performing the test, warm up the projector for 20 minutes and degauss the display.
The more important test, the first is the brightness and contrast test Brightness and contrast. Let's look at the projector's contrast in black and white. When viewing the contrast, the image used by the projector often determines the contrast of the screen, so the contrast of the projector is good, and the grayscale changes are also determined, which determines the transparency of the projector image.
NOKIA ntest brightness and contrast test chart
The focus test is a necessary test item when the projector is purchased. After adjusting the focal length of the projector, everyone observes that the black and white blocks of the image alternately change. If there is no color block displacement, the quality of the projector is reliable. A slight shift is acceptable, and if the movement is large, there is some problem with the quality.
NOKIA ntest focus test chart
Finally, remember to do a text sharpness test that shows the clarity of the text and shows if the text is blurry on the image. Good projector text is sharp and legible.
Home Projection Ultimate Test Tool
"Super HiVi CAST" is a tool for testing home projectors , and the most gratifying thing is that it is not only fully tested, but also with Chinese subtitles, and detailed description of a complex test procedure, is now all display device testing The most profound one in the software is that it does not have a test chart like other test discs. The user is monitoring the device while watching Super HiVi CAST. When the disc is viewed, the projector test is followed. It's done.
Blu-ray version of "Super HiVi CAST" packaging
There is now a downloadable version of Super HiVi CAST on the Internet , but the capacity is large and may take a long time. I suggest that you can go to Taobao to buy a pirated version of Super HiVi CAST. The genuine price is more expensive. But with a color filter, it is used to color the projector. The price of the D version is about 30 yuan. Although there is no filter, when the performance of the projector is tested, the filter does not play any role.
Super HiVi CAST clear map test screenshot 
Super HiVi CAST Contrast Test Chart Screen Capture 
Super HiVi CAST Contrast Test Chart Screen Capture 
Super HiVi CAST color test chart screen capture
Testing hot areas is important
This test is an important item to confirm whether the projector can guarantee stable operation. Although it is to test the temperature of the projector, it is not to test how much the temperature of the projector outlet can reach, but to see that the temperature of the projector is concentrated. Which areas?
The main heating part of the projector is the light bulb. The main heat-receiving parts are the light machine and the lens, then the main board. The most heat-resistant part inside the projector is the light box, then the light machine and the lens, and the most heat-resistant part is the main board. According to data released by some manufacturers, the heat resistance temperature of the projector board is 130-150 degrees. This temperature can be easily achieved for a bulb above 250W.
Projector heat source efficient UHE bulb
Therefore, when selecting a projector, be sure to turn it on at least half an hour on the spot, and then try to test the heat of the projector air outlet, light machine, lens, and main board. Generally, the order of heat from the high image level is , light warehouse, air outlet, light machine, lens, motherboard, if the motherboard position has reached a very hot heat, please do not hesitate, let the merchant give you another model, and then do the test.
 3LCD projector light machine and light path |
Today I introduced you several software and some experience in testing projectors. I hope that when you buy projectors, you can reduce the possibility of being fooled by JS. Even if you still don’t understand how to use these softwares, it doesn’t matter, buy them. When the projector took out the software, and ran a circle on the projector, it basically scared JS to death. Finally, I hope everyone can buy a projector that is satisfactory!
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