The main body of the display market is matched with the desktop PC. As a PC monitor, is the bigger the better? For PC, the first thing is whether it is applicable, not whether the bigger the better. From the point of view of ergonomics, the distance between the human and the monitor must be kept in an appropriate position. Generally speaking, the larger the size, the farther the distance. At present, 17-inch LCD (ordinary screen) is enough for PC, which can completely meet the needs of users, but it is not necessary for PCs above 19 inch (excluding 19 inch). From this point of view, the current 16:9 and10 are suitable as long as they can achieve the display effect of 17 inch (the font of the system shall prevail for the time being, because the font is too small to look really difficult).
According to the above principles, the selection method can be as follows:
Basic requirements for (1) 19 inch screen configuration.
It is no longer appropriate to buy a 17 inch screen. Widescreen is the main trend, 19 inch widescreen can meet the above requirements, and the price of 19 inch LCD can be said to be quite the price of cabbage (although the price has increased slightly recently). The price of low-end products is around 600 to 800 yuan, and the price of high-end 19 LCD is also 800 to 65438. From the size point of view, 19 inch is not large, but it can still get better results in the actual use process. The resolution of 1440×900 and the point distance are well controlled, and users are not easily tired. Moreover, the specification with the width of 19 has little pressure on hardware, and users do not need to invest too much hardware resources.
Generally speaking, the price of 19 inch widescreen LCD is reasonable, and the hardware requirements are not high, which can meet the basic configuration of our family, especially suitable for our office needs.
(2)22 inch mainstream configuration
If the LCD is too small, the viewing area will be smaller, which is not suitable for users who pursue a big face. However, the size is too large, but there are also many problems. Because of the frequent eye movement and the close distance, users are easily tired. As we all know, when watching movies, most people will choose the middle and high position. This is mainly because when the screen is large, we need a certain distance to get a complete and clear view. If the distance is too close, we feel too depressed. You need to constantly adjust the angle when watching, and your eyes will feel uncomfortable.
We usually use it in front of a desk or computer desk, and the distance from it is about 50 cm to 80 cm. In this case, according to the previous principle, the most suitable liquid crystal at present is a 22-inch liquid crystal with standard resolution (1680× 1050). Because it is widescreen, the effect of displaying fonts is equivalent to 17-inch normal and 19-inch display. Choosing a 20-inch LCD with the same resolution, on the one hand, the price gap should not be too big, on the other hand, the dot spacing is too small, which will make many users unable to adapt. Therefore, it is the most common choice to buy a standard 22-inch LCD with the ratio of 16: 10.
Figure 1 LG W2254T Q (video display link) LCD.
Now it seems that many manufacturers are promoting high-resolution LCD at attractive prices, but after Benbo's personal trial, I think this is not the function of ordinary computer users. For example, if the resolution of 1920× 1080 is achieved on a 22-inch monitor, will the font display be smaller? So it is not a technology (or function) that should be advocated at present. Really tired! For example, this is the case with the W2253TQ purchased by Benbo. Because the word is too small, it has to be changed to W2254TQ.
Hyperscore has different values for different users, and it is also a special user group. For example, it is better to display the pictures more carefully with a display machine, so that users will not care whether they are tired or not in text application, which is not its main purpose.
There are many kinds of 22-inch LCD to choose from: Samsung T220, Youpai VX2260WM, TPV, BenQ, Philips, LG, etc. Here LG recommends W2254TQ products. Please check online yourself!
Figure 2 Four new functions of LG W series
(3)24-inch movie height configuration
The price of 24-inch LCD has also dropped a lot in the past. At present, many brands have introduced 24-inch LCD within 2000, which makes middle and high-end users start to buy 24-inch LCD. The display area of 24-inch LCD is quite large. If users use it to study or work, assuming that the distance from the LCD is about 70cm, then in the actual use process, it can be determined that they need to shake their heads left and right to adjust the angle and direction. For long-term users, these small moves will make you very tired, and you will not suffer from occupational diseases for many years, even if you burn high incense.
Ursa Minor
In fact, the best use of 24-inch LCD is mainly for supporting high-definition video, and the resolution has reached the high-definition standard of 1920× 1080. The display effect of this size conforms to the above principles. This kind of application is practical for home multimedia users, and the displayed font will not be too small (reaching the font size of 17 inch), such as setting HTPC in the living room. It is necessary to have a size of 24 inches or more. At this time, high resolution and super-large size can really exert their power and make us feel more comfortable. Therefore, if you want a big screen and enjoy 16:9 HD (1920× 1080), then only a 24-inch LCD color display is the most suitable.
There are many people who often use computers, and their eyes will have symptoms such as acid, pain and tears, and even worse, their eyesight will decline. All these uncomfortable symptoms are signs of eye self-protection, indicating that the eyes are hurt and need protection. If we ignore these symptoms, the result will further damage our vision, which is usually incurable.
Long-term use of computers has become the main cause of visual impairment at present. Many people use eye drops, buy anti-radiation screens or wear anti-radiation glasses, or eat health products to protect their eyes. Which way can protect their eyes more effectively? Let's use professional medical research literature to reveal the truth of computer eye injury. When everyone knows the truth, we can really protect our eyes effectively.
Computer background light is the enemy of eyes.
According to the latest survey of the authoritative German computer magazine Macwelt, although the radiation of LCD screen is much smaller than that of ordinary display screen, it is easier to make our eyes tired and may even lead to symptoms such as headache because of its high brightness. Researchers pointed out that when the brightness of the display reaches [AD] 100cd per square meter (that is, the unit of luminous intensity "Candeira"), it has already had a certain impact on the eyes. However, the luminous intensity of the LCD screens they tested exceeded 300cd per square meter, and some even reached 400 CD-500 CD.
Dr. Wei Haien, a German computer expert who presided over the survey, said that this problem exists not only in LCD computers, but also in LCD TVs. In order to improve the definition, these LCD screens not only rely on the lamp behind the screen to improve the brightness, but also generally use special "polishing technology" to make the display surface look like a piece of glass, which is very textured, and also improve the color contrast and saturation of the screen. However, it also reflects light like glass. Especially when light hits the screen, it will increase the light reflection. Consumers who use this kind of display screen are easy to be "stabbed" by light, and have symptoms of eye fatigue, which will gradually lead to health problems such as decreased vision and headache.
Experts complain about artificial light sources such as LED and computer.
Following the seventh annual meeting of the International Lighting Association (ILA) held in Amsterdam, the Netherlands, a seminar on "Light-Color-Health" was held in Vienna, Austria on122 and 23 October (10). Scholars and doctors from more than 20 countries made reports. Lubeck in Sweden, Alexandria in Germany? A. Wunsch, martel of Canada and other world-class optical masters attended and published important research reports. Lee Chad? Professor R.H.W. Funk's report pointed out that when "inappropriate light" continuously irradiates our eyes, it will cause dysfunction, especially the light emitted by LED lamps and computer screens, which contains a lot of short-wave blue light with high energy and irregular frequency. These short-wave blue lights are extremely energetic and can penetrate the lens and reach the retina. Blue light irradiation on retina will produce free radicals, which will lead to the decline of retinal pigment epithelial cells, and the decline of epithelial cells will lead to the lack of nutrients in photoreceptor cells, thus causing visual damage. Professor Feng Ke pointed out that these "inappropriate lights" are the chief culprit of a large part of senile blindness-macular disease (AMD). Professor funk's report caused a great response, which made people start to think calmly about the harm of such invisible killers around them.
Therefore, there are two main ways to solve the computer injury to the eyes:
1 Eliminates the excessive blue light and ultraviolet light contained in the spectrum emitted by the computer screen.
Eliminate electromagnetic screen stroboscopic, namely CVS.
Countermeasures:
1. Take a regular rest to avoid using your eyes for a long time: every hour, keep your eyes away from the computer and relax to relieve eye fatigue.
2, filter blue light, wear computer protective glasses that can filter blue light, such as Hello computer glasses in Germany: computer blue light is the root cause of eye fatigue and visual cell damage, so it is necessary to filter blue light to eliminate the damage of continuous blue light radiation. Filtering blue light can not only eliminate symptoms such as eye pain when watching a computer, but also relieve eye fatigue. More importantly, it can prevent blue light from damaging visual cells.
At present, most scholars believe that filtering blue light can reduce the incidence of apoptosis and retinal degeneration. In the study of patients after cataract surgery, it is confirmed that yellow intraocular lens can effectively absorb a lot of blue light and prevent macular degeneration caused by direct blue light on retina. For us normal people, using glasses that filter blue light is the most effective way to prevent blue light damage. Ordinary anti-radiation glasses can only filter ultraviolet rays, but not blue light. Special yellow anti-blue glasses can not only effectively isolate ultraviolet rays, but also filter more than 90% blue light. They are suitable for outdoor use and watching computer or TV, which can greatly reduce the influence of blue light on eyes, eliminate uncomfortable symptoms such as eye acidity, fever or pain, and relieve eye fatigue.
3. Antioxidants and free radical scavengers: Blue light will cause photooxidation reaction and produce too many free radicals to damage photoreceptor cells, so it is necessary to supplement substances with antioxidant effects, such as anthocyanins and vitamin C in fruits. The free radical scavengers used in clinic include dimethyl thiourea and high-dose allopurinol, which can effectively protect the retina from blue light injury. In addition, the use of powerful antioxidants, such as butylated hydroxytoluene and vitamin E, against retinal oxidative damage can alleviate retinal blue light damage to some extent.
4. Protector of enzyme activity: Studies show that lutein and zeaxanthin have the function of protecting cytochrome oxidase and protecting retina from blue light damage.
5. Optic nerve protective agent: Common optic nerve protective drugs such as vitamin B 1 and mecobalamin. It plays a role in nourishing and supporting the optic nerve.
Personally, 19 inch widescreen is enough, which is harmful to eyes!
What size LCD should I buy? 22 is too dazzling. I am still used to 19.
How big should a computer LCD monitor be? Generally use 17 inch. Depending on your own needs, 19 inch also looks comfortable.
How big is the computer LCD? At present, mainstream monitors are all 23 inches, but the bigger the better, it depends on the material of the screen. IPS material is better.
How many inches should I buy a computer LCD monitor? That depends on your purpose. If it is only used for ordinary office study, then the mainstream choice 19, the size is appropriate. But if you are a game lover or a movie lover, you can choose a bigger screen, which can bring you a very good visual impact. Another thing is to see where your computer is. If you are a student and put it in the dormitory, you'd better choose 19 because space is limited. If you are at home, especially in a large house, you can choose "big face" to match the interior. What's more, to a certain extent, big faces need better graphics cards to support them. Generally, large-size monitors need DVI or HDMI high-definition interfaces, which invisibly increases your purchase cost. It will be better to buy it after weighing it all.
Is LCD harmful to eyes? The radiation of LCD is definitely much smaller than that of flat panel.
If the brightness is too high, it will hurt your eyes more than ordinary cathode-tube displays.