How to Avoid Dark Spots when Buying an LCD Display?

Ⅰ. What is the dark spot of LCD liquid crystal display?

In a sense, dark spots are more hidden than flash points and pixel points, but it has a much greater adverse effect on everyone than pixels.

Sometimes on many LCD displays, there will be many not very large spots. The small dark spots of the LCD monitor are as small as soybeans, and the large ones are likely to be as large as a thumb.

Different from the flash and dark spots, the dark spots are only slightly darker in local color matching, which is not easy to be found when seen from the front, and only possible when viewed from the side.

The main reason for the formation of dark spots may be the long-term extrusion of external force, and we think it is very likely that the dark spots appear due to improper handling during the transportation process.

An LCD liquid crystal display with dark spots is usually difficult to find from the front, but it is relatively obvious from the side.

It is recommended that when you buy an LCD display, do not simply look directly at the LCD to find the pixels. You should view the screen surface from multiple directions and set the screen to white, which will make the dark spots nowhere to hide.


Ⅱ. What should be paid attention to when purchasing a high-brightness LCD display?

In life, the high-brightness LCD screen should be familiar to us, because we can see it at any time, but its parameters are also different according to different occasions.

Many people don't understand this thing, and they are often at a loss when buying LCD liquid crystal displays. Let's analyze how to buy this kind of high-brightness LCD display:

1. Brightness LCD screen backlight uniformity

In general, the uniformity of high-brightness screens can be divided into the following three levels: uniformity reaches 65%-75%, uniformity reaches 75%-85%, and uniformity can reach more than 90%-95%. Of course, if done well, the price will be higher.

2. Brightness of bright LCD screen

Generally good LCD liquid crystal display has high brightness, but the picture is soft and does not hurt the eyes. Not equal to the illuminance of the backlight (like the sun, the light is strong but also dazzling).

The brightness value is a color range value, which is related to the color saturation, contrast, and illuminance of the screen backlight. Therefore, looking at a very bright screen may not achieve the required brightness value, because what the human eye sees is the illuminance, which is affected by the environment, space size, etc., and can only be measured with an instrument.

Ⅲ. The heat dissipation temperature of the high-brightness LCD screen

Temperature is an important parameter for customers to choose high brightness LCD screen. Good high brightness LCD liquid crystal display with low heat dissipation and low power consumption. The higher the temperature, the faster the light decay of the LED backlight, thereby reducing its service life.

Ⅳ. The professionalism of the manufacturer

A high-quality bright LCD screen is not only a good light source, but also a bad packaging process. When the light source is good, the LED heat dissipation process is not good, the light guiding process is not good, and the light efficiency is not good.

Therefore, when customers choose a good bright LCD screen, they must pay attention to whether the manufacturer is professional. Only professional manufacturers can carefully produce qualified LCD display products.