The LCD craze has receded, and CRT monitors have once again become the focus of attention. What issues should you pay attention to when purchasing a CRT monitor? Let’s talk to you about the 10 major problems with CRT monitors.

Traditional CRT monitor technology has become very mature today. Although it is not as slim and naturally beautiful as LCD monitors, it still has absolute advantages in many aspects. In particular, flat-screen monitors have good quality and are affordable to the public. Even the controversial radiation issue is controlled below safety standards (experts have long used data to prove that a The radiation from cosmic rays that people receive every day is far greater than the radiation from CRT monitors). As the immaturity of LCD technology continues to be exposed, people are turning back to re-examine CRT monitors. It seems that CRT monitors will remain the mainstream of the market for some time.

The best table display effect can be obtained by controlling distortion well

Faced with the hot-selling atmosphere of the market and the dazzling array of CRT products, rational consumers can’t help but ask, choose and buy What aspects should you pay attention to when choosing a CRT monitor that is suitable for you? Is CRT really impeccable? The expert's answer is: Although the technology of traditional CRT monitors is quite mature, the CRT monitors themselves still have some irreparable defects. In addition, the quality of the products on the market varies, and there are many fake ones, resulting in the poor quality of CRT monitors in the current market. There is a big difference, even the quality level of the same type of products of the same brand is different. Then it is necessary for us to take a look at what issues we need to pay attention to when purchasing a CRT monitor.

Ghosting—False focus is the cause

Focus problem has been accused by some LCD advocates as a major sin of CRT. When we open a text file, we often observe whether the font is clear, whether the font strokes are delicate, and whether the edges of the text are sharp. If you observe carefully, you will find that many of the current mid- to low-end CRT monitors have the problem of inaccurate focusing. Some can be better solved by adjusting the monitor, while others cannot always achieve satisfactory results. If you work in front of a monitor with poor focus for a long time, it will soon cause eye fatigue and even cause myopia and other adverse consequences. When buying a monitor, be sure to pay attention to whether the monitor has excellent focus. After all, eyes are very important.

Dazzling - Flicker gives you a headache

Excellent monitors are expensive, and there is a reason for it

Flicker has always been a headache for users of low-end CRT monitors Locally, the flicker problem is related to the refresh rate of the display. When the refresh rate of the display is too low, flickering will occur. The flickering phenomenon will also accelerate the fatigue of the eyes and cause myopia. We know that the refresh rate of the monitor is closely related to the line frequency, so it is best to choose a CRT monitor with a higher line frequency. At the same time, although some low-end monitors are rated to have higher line frequencies, they simply cannot meet the high line frequency standards in practical applications. Although they can work by exceeding the line frequency, I do not recommend this solution.

Characters always have color halo - convergence ability is not a small problem

We can observe in the DOS window whether there is a red or bluish color halo at the edge of the flashing white characters. Generally, household monitors This happens all the time. The convergence problem often troubles some professional graphic design users, but as far as the current technology is concerned, it seems difficult to completely solve the convergence problem. You can only pay attention to products with relatively weak color halo when purchasing a monitor.

The monitor has shrunk - the breathing effect is obvious

Adjust the display area to the maximum and change the desktop and there should not be any changes

This often happens: Yesterday The monitor that I just set up suddenly had a black border of about 1 cm around it when I turned it on today. After using it for about half an hour, the desktop filled the entire screen again. This is what we often call the breathing effect. The breathing effect is inseparable from the manufacturer's technical process. If the relevant control circuit designed by the manufacturer is not advanced enough, the breathing effect will easily occur. Of course, products from some well-known manufacturers do a better job of avoiding the breathing effect.

Walking in a rainbow - uneven colors

You can set the desktop background to pure white and observe whether the purity of the white is consistent at various locations on the screen and whether there are any obvious color spots. Color uniformity is also important to professional users. General users can basically ignore this phenomenon, because almost all current monitors have color uniformity problems.

Thermal expansion and contraction—it turns out to be caused by high voltage

The working voltage in the CRT monitor is as high as 10kV~30kV. The internal radiation generated by such a high voltage is very likely to affect the normal operation of the picture tube. Work. The simplest case is that when the window is alternately maximized and minimized, there will be obvious scaling in the corners of the screen, and the normal change amplitude should not exceed 0.5 mm.

The swollen display—magnetization phenomenon

Whether it is the earth’s magnetic field, high-power electrical appliances, or wireless communication equipment will produce a strong magnetic field, if the display is not well shielded from the magnetic field Due to its poor performance, it can be easily magnetized and cause large color spots on the screen. If a new monitor has a magnetization problem, dealers usually have degaussing rods available to degauss it.

Hair fell out—radiation is the key

Most of the current monitors have passed the TCO 99 certification

The light of the CRT monitor is emitted through the cathode tube, and also CRT monitors emit radiation, which is harmful to the human body. However, due to the introduction of numerous safety regulations and the strict TCO9x standard, CRT monitors have greatly improved in terms of radiation. However, the radiation of some low-end monitors obviously exceeds the standard. For the sake of health, it is best to choose a monitor that passes the TCO standard when purchasing.

The horizontal and vertical distortions are not flat and vertical - distortion causes big trouble

When choosing a monitor, linear distortion and non-linear distortion are often easily ignored. To put it simply, linear distortion means that the lines are not straight, while non-linear distortion means that the table is uneven (each cell is different in size or shape). These two distortions will undoubtedly affect the display effect. It should be possible to correct it through the adjustment function that comes with the monitor. In fact, most displays have varying degrees of linear distortion and non-linear distortion, which cannot be completely eliminated through adjustment.

Complex adjustment—the design must be reasonable

If a monitor does not have a reasonably designed OSD adjustment system, it will add a lot of trouble during use. For Chinese users, a properly designed adjustment menu should generally be displayed in Chinese and provide complete adjustment items. In addition to screen size and position adjustment, there should also be many adjustment options such as distortion, deformation, and color temperature adjustment. There should also be well-designed adjustment buttons. This will make it easier to adjust the monitor in future use.

︶ㄣЖㄜ︵ 2007-08-28 16:29