What Are The Disadvantages Of Low-end LCD Display?
- May 22, 2018 -

                               

There are many low-end LCD screens on the market for sale, and many consumers who do not know will think that they can buy good LCD screens with very little. In fact, the low-end LCD displays have many shortcomings. We should make rational choices after analyzing and judging. What are the disadvantages of the low-end LCD display?


The low-end LCD display mainly has the following disadvantages:


First, the corresponding time


The response time is a special indicator of the liquid crystal display. The response time of the liquid crystal display refers to the speed at which each pixel of the display reacts to the input signal. When the response time is short, no image smearing occurs when the moving picture is displayed. This is very important when playing games and watching fast-moving images. Fast enough response time to ensure the continuity of the picture. At present, the general liquid crystal display on the market has a great breakthrough in response time compared with before, generally about 40ms. But still can not meet the requirements for 3D games and high-quality DVD movie playback.


Second, the interface


1. The digital interface of the liquid crystal display is overwhelming. In theory, the liquid crystal display is a pure digital device, and the connection to the host computer should also be a digital interface. The advantages of using a digital interface are self-evident. First, it can reduce the signal loss and interference in the process of analog-to-digital conversion; reduce the corresponding conversion circuit and components; secondly, it does not need to adjust the clock frequency and vector.


2. However, most of the low-cost liquid crystal displays currently on the market use analog interfaces, and there are problems such as the transmission signals being susceptible to interference, the need to add analog-to-digital conversion circuits inside the display, and the inability to upgrade to digital interfaces. Also, in order to avoid the appearance of pixel flicker, it is necessary to completely match the clock frequency, vector, and analog signal. In addition, the digital interface of liquid crystal displays has not yet formed a unified standard, and display cards with digital output are not common in the market. As a result, the key advantages of LCDs are hard to fully realize. For now, the result of early consumption is to spend a high price to buy a display.


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Third, brightness and contrast aspects


Do you want to play a flashlight? This joke is about the brightness and contrast of LCD monitors. Since the liquid crystal molecules cannot emit light by themselves, the liquid crystal display needs to rely on external light sources to assist light emission. In general, 140 lumens per square meter is enough. Some manufacturers still have gaps between the parameter standards and the actual standards. Here to explain, that is, some small-size LCD monitors have been mainly used in notebook computers in the past, using two lights to adjust, so their brightness and contrast are not very good.


Fourth, the viewing angle


Early viewing angles of LCDs were only 90 degrees, and they could only be viewed from the front. Larger brightness and color distortion would appear when viewed from the side. Nowadays, the viewing angle of liquid crystal displays in the market is generally around 140 degrees, which is enough for personal use. However, if several people watch at the same time, the problem of distortion is revealed.