Key Features of LCD Monitors

- Mar 30, 2020-

Thin body saves space

Compared with the more bulky CRT display, the LCD display requires only a third of the space of the former.

 

Power saving does not generate high temperature

It belongs to a low power consumption product and can be completely non-heating (mainly power consumption and heat generation exists in backlight tubes or LEDs), while CRT displays inevitably generate high temperatures due to imaging technology.

 

Low radiation benefits health

The radiation of LCD monitors is much lower than that of CRT monitors (it's just low, not completely free of radiation, and electronics are more or less radiated), which is a good news for people who work in front of a computer all day.

 

The picture is soft and does not hurt the eyes

Unlike CRT technology, the LCD screen does not flicker, which can reduce the damage to the eyes of the monitor, and the eyes are not easy to fatigue.

 

The liquid crystal display is green and environmentally friendly. Its energy consumption is simply too small compared to the traditional CRT (17 '' power is between 65-12W); it has also missed the noise pollution that has gradually attracted the attention of the Chinese people recently. Because its own working characteristics determine that it will not produce noise (for those who like to use the computer and beat the monitor rhythmically, the noise is not considered here); Another advantage of LCD monitors is that they generate heat It is relatively low, and it will not feel hot when used for a long time. This is also incomparable with the previous display. The previous display was precious, especially in summer. The air conditioners and fans at home must serve it to cool it down. The use of liquid crystal displays virtually cools the atmosphere and also contributes to preventing the atmosphere from increasing. At the same time reduce radiation and reduce environmental pollution. Of course, environmental protection will not lose the index of radiation. Although we cannot say that LCD monitors are completely free of radiation, compared to the radiation of large CRTs and the radiation of daily household appliances, the little radiation of LCD monitors is negligible. .

 

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The current era is actually the analog era, and the future era is the digital era from the current development trend. Intelligent display operation, digital control and digital display are necessary conditions for future displays. With the advent of the digital age, digital technology is bound to completely replace analog technology, and LCD will soon completely replace current analog CRT displays.

 

But from another aspect, the digital interface of LCD is not popular now, and it is far from being applied. In theory, the liquid crystal display is a pure digital device, and the connection with the host computer should also use a digital interface. The advantages of using a digital interface are self-evident. Firstly, it can reduce the signal loss and interference in the analog-to-digital conversion process; reduce the corresponding conversion circuits and components; secondly, it does not need to adjust the clock frequency and vector.

 

However, the interfaces of most liquid crystal displays on the market are analog interfaces. There are problems such as the transmission signal is easily interfered, the analog-to-digital conversion circuit needs to be added to the display, and the digital interface cannot be upgraded. And, in order to avoid the occurrence of pixel flicker, the clock frequency, vector and analog signal must be completely consistent.

 

In addition, the digital interface of the liquid crystal display has not formed a unified standard, and display cards with digital output are rare in the market. As a result, the key advantages of liquid crystal displays are difficult to give full play to.

 

This problem may not be well understood, let us illustrate it with an example. People who have used LCD monitors know that LCD monitors are prone to image smearing.

 

Response time is a special indicator of liquid crystal displays. The response time of a liquid crystal display refers to the speed at which each pixel of the display responds to an input signal. If the response time is short, there will be no image smearing when displaying a moving picture. This is very important when playing games and watching fast-moving images. Fast enough response time to ensure the coherence of the picture. At present, the response time of general LCD monitors on the market has been greatly improved compared with the past, and it is generally about 40ms. However, with the development of technology, this gap between LCD and CRT is gradually being filled, and the response time of an LCD monitor has been shortened to 5ms.

 

From the appearance, the appearance of the LCD display is light and ultra-thin. Compared with traditional spherical displays, its thickness and volume are only half that of CRT displays (such as ASUS ’s MS series products, which have a surprising thickness of 1.65cm) , Greatly reducing the footprint.

 

Hong Kong and Tokyo are the regions with the highest LCD penetration rates in the world. Last year, Hong Kong's LCD monitor shipments accounted for 70% of total monitor shipments. If we look at the areas where the LCD penetration rate is high, it is not difficult to find that most of these places are more prosperous, more crowded, the living standards are higher, and there are office buildings and financial buildings. In these places can be described as earth and gold. The price of the land saved by the display is much higher than the difference between the LCD and CRT displays. At present, the prosperous areas of some large cities in mainland China are also trending in this direction.

 

This question actually asks you what you want your monitor to do. As everyone knows, since liquid crystal molecules cannot emit light by themselves, liquid crystal displays need to rely on external light sources to assist in light emission. Generally speaking, 140 lumens per square meter is enough. There is still a gap between the parameter standards and actual standards of some manufacturers. Here to explain, that is, some small-sized LCD monitors were mainly used in notebook computers in the past, using two lights to adjust, so their brightness and contrast are not very good. However, the brightness of mainstream desktop LCD monitors can generally reach 250 to 400 lumens, and has gradually approached the level of CRT.

 

For most people, if you put the CRT and LCD together, you can easily distinguish the difference in brightness, contrast, and color saturation between the LCD and ordinary CRT displays, but in general use, this A small gap will not affect your work.

 

However, for professional artists and other tasks that require accurate color, LCD monitors cannot fully meet their requirements.