Cold knowledge, the popularity of LCD screens can not protect eyesight

Experts have doubts about the effect of protecting the eyesight of liquid crystal displays. To date, the development of LCD monitors, brightness and contrast have been greatly improved. From the point of view of the products in the market, the brightness of 250 streams and the contrast ratio of 500:1 LCD is the lowest indicator, and most products have a brightness of 300 lumens or a higher value. All said that LCD monitors are environmentally friendly, have low radiation, and can protect eyesight. For the first two points, there is no opinion, but they are skeptical about protecting their eyesight.
According to a survey conducted by a German authoritative organization, although the LCD screen is much less radiant than the normal display screen, it is more likely to make our eyes become tired because of its high brightness, and may even cause headaches and other symptoms.
In the survey, the researchers tested 10 different brands of 19-inch LCD screens and found that all the tested LCD screens had the problem of “high brightness”. The researchers pointed out that when the brightness of the display reaches 100cd per square meter, it will have an impact on the eyes. The liquid crystal display they tested had a luminous intensity of more than 300 cd per square meter, and some even reached 400 cd-500 cd.

Although for the above studies, different scholars and consumers will have different views, but in terms of Xiao Bian's own experience, the high brightness of the LCD screen does cause visual fatigue. When regulating most liquid crystals, 30% brightness is sufficient. However, in order to achieve better results when the LCD is displayed, manufacturers usually set a very high brightness and contrast at the time of shipment. Some models will return to the default parameters after selecting the automatic adjustment item, which virtually increases the consumer. The possibility of visual impairment.
In addition, the 17-inch liquid crystal and the 20-inch widescreen have the problem that the font is too small in the default state. Looking at a long time will make people's eyes blurred, which affects the eyesight. For users with limited computer knowledge, many people will use the LCD under the default brightness, default resolution and font. It will inevitably affect their eyesight for a long time. Friends who use LCD screens must pay attention. This is a matter of immediate concern with your own health.
When using a computer, the distance between the eyes and the screen should be about 60 cm. It should not be too close. Second, the liquid crystal display has a functional design with high and low brightness, and the light brightness is adjusted as much as possible during use.
Fashion will be dressed in a beautiful coat?
The slender body of the LCD panel is destined to be a design material that many famous designers would like to see, which is not hard to see from many IF Award winners. Outstanding design is one of the factors that consumers pay most attention to when buying LCD. But does the fashion LCD you see in the electronics market wear a beautiful coat?
Careful observation of the current display market, you can easily find that dazzling LED indicator has become a mainstream design method. Especially for the liquid crystal display, this design is applied to the very best, several major brands, in addition to the conservative ViewSonic has not been replaced, the other brands without exception introduced the design of the use of dazzling LED power indicator.

Electronic stores are generally very good light conditions, coupled with dazzling LED indicators, this type of design of LCD is easy to stand out in the total products, as a "charm", "fashion", "new wave" spokesperson, consumers choose The possibility of such liquid crystals has also increased. However, have you ever thought that it will bring endless regret? The answer is no, most consumers only consider the "first-person lover" effect when buying, and rarely consider what will happen when the LCD is actually used.
The LED lights wearing fashionable coats are dazzling in the store because of the wonderful effect of the short contact time. However, once you bring it home, the blue-colored blue LED display light is a nightmare for the user at night. Fashion and vitality suddenly become glazed and helpless. If it is used for a long time, this reaction is even more pronounced. The extreme situation is that when you have to turn off the lights to use the LCD, the blue LED lights will have a feeling that makes you go crazy. This kind of design with a coat of fashion is not worth mentioning.
If you have already purchased this kind of LCD, you can only find a cardboard file, will it be that you intend to break this LED light? If you haven't purchased it, it's best to avoid this type of design, or buy the LCD of a low-brightness LED display.
LCD screen must be equal to low power consumption?
Low power consumption, power saving, energy saving and environmental protection of LCD screens are an important magic weapon used by countless seniors and manufacturers to promote LCD screens. Some people even use calculators to calculate. If people are all LCDs, then one year will be How much energy is saved?
Is this true? In most cases, the LCD saves power compared to the CRT. This formula is true, but in certain circumstances, it is not the case. The most typical situation is that Chimei's LCD panels usually have high power consumption. Its U-shaped six-lamp design is indeed a big consumer of electricity. If you carefully analyze the 19-inch widescreen LCD in the current market, it is not difficult to find. Basically all of them are electric tigers.

19-inch widescreen LCD power consumption of 60W, 19-inch ordinary LCD power consumption of 65W, this parameter has been quite amazing, in the face of such LCD, we really can not be associated with energy-saving pioneers such words. How about the performance of CRT? The most typical energy-saving representative is AOC's iU chip. Although this chip's 795FK has a high bandwidth of 202MHz, the highest resolution can be up to 1600×1200, but its largest Power consumption is only 58W, not to mention AOC's 19-inch CRT power consumption is not higher than 60W. As for Philips, Hyundai, and other brands, their achievements in power control have long been known to consumers.
Although the LCD and CRT's power consumption in the market has seen an upside down, according to experts, LCD monitors can also be more energy-efficient. The existing liquid crystal display screens almost all use the lamp tube as a backlight light source, and there are two major disadvantages: relatively large power consumption and unsatisfactory color gamut performance. In the development of the latest LCD technology, light-emitting diodes are becoming popular. The working principle of the light-emitting diodes determines that their power consumption can be as small as practically negligible. Moreover, LEDs, as backlights, have a range of color gamut which is unmatched by lamps. Current products have NTSC color gamut percentages exceeding 100%. It is a historic leap for improving the color performance of LCDs. At present, LED backlight has been applied to a few high-end displays, notebook computers, and LCD TVs. Sony believes that once the cost of LED backlighting is reduced to a wide range of applications, it means that the era of highly energy-efficient LCD displays will officially come.

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