Public Opinion Survey on bright and dark laptop screens

● Bad points

In the case of a white screen, it is a pure black dot or a pure white dot under the black screen. In red, green, and blue mode, this point is always in the same position and is pure black or white. This indicates that the R, G, and B Sub-pixels of the pixel are damaged. Such points are called bad points.

● Highlights
In the case of a black screen, the R, G, and B (red, green, and blue) points are highlighted.
There are two highlights:
① In the case of a black screen, simply present the R, G, or B color points.

② When switching to the red, green, and blue display modes, there are only white points in one of R, G, or B, in the other two modes, there are other color points. In this case, there are two highlights in the same pixel.

● Hidden points
In the case of white screen, non-pure R, G, and B color points are called hidden points.
There are two kinds of dark spots:
① When switching to the red, green, and blue display modes, black spots exist only in the R, G, or B display modes at the same position, this indicates that there is only one dark point in this pixel.
② When switching to the red, green, and blue display modes, there are black spots in the R, G, or B display modes at the same position, this indicates that there are two hidden points in the pixel.

The notebook LCD screen has "Highlights" and "hidden points", which are both "bad points": as the name suggests, "Highlights" means that no matter what you do, it will be eye-catching as long as you start the system, because it is always on and never changes. Although it is unlikely to appear, it is the most annoying form of "bad points. The "dark dot" means that no matter how the screen is displayed, the dot on the screen is always "black" and will not emit light. Although you may ignore the existence of it, we will still feel depressed whenever we pay attention to it, right.

LCD keyword explanation
Bad Points: these are collectively referred to as liquid crystal particles that cannot be normally displayed on the LCD panel. The LCD panel is composed of many liquid crystal particles. Under the control of electrical signals, liquid crystal particles constantly change the light transmission status and present the light and color on the screen. Generally, bad points mainly include the Highlights when the light passes completely and the hidden points when the light does not pass through. The hidden points have little impact on the quality of the LCD display, the reason is that there are more strict requirements on the locations of highlights and highlights in the LCD quality evaluation standards. In practice, you will find that these bad points are very eye-catching and have a serious impact on the visual effect, because the LCD bad points are strictly controlled. If the finished LCD display is a class-a product without any bad points, there are no more than three bad points, and a-class product is not in the central area of the screen, there are no more than three bad spots, of which no more than two are highlighted, and products that are not in the central area of the screen are Class B products.

Laptop LCD screen classification knowledge
The nominal level of mainstream LCD products is:
AAA level: the LCD display without any bad points is AAA level.
A: There are no more than three bad points, and the highlights are not in the central area of the screen.
Level B: There are no more than three bad points, of which no more than two are highlighted and not in the central area of the screen.

First of all, it should be noted that this is an industry standard. It is just an agreement. Vendors in different regions will also be different. For example, Korean manufacturers, below three are Class A manufacturers; Japanese manufacturers, below 5 are Class A; Taiwan manufacturers; below 8 are Class

Here we also talk about the "Highlights" and "hidden points". Friends who just used Nb may not be clear:
The highlight is the red, green, and blue points displayed on the screen when the screen is set to black.

When the screen is set to be completely white or the same color, the screen does not display the color.

In fact, the identification of Liquid Crystal panels is not only about the number of bad points and highlights, but also the difference in color purity and visual angle is the main basis for evaluation. Manufacturers should make a comprehensive evaluation based on these product indicators, only in this way can LCD be rated as A, B, and C, and the product will be priced based on this. Among them, A and B screens must be tested with dedicated equipment, difficult to identify with the naked eye.

Code :

 
I will first extract a conversation with the supplier "(10:48:13) haomai 10:45:53 yesterday v505ec delivered? * *********** 10:46:12, but it hurts us (10:48:38) haomai 10:47:19 ???? * ************* At 10:47:30 everyone wants to scold you. 18 machines pick the only one, and all others are a bit hacked, it seems that this batch of ec LCD is not good"
 

Because of the strong hand, most of the screens on every 3-5 machines have dark spots or bright spots (Note: of course some small customers cannot find out). In actual use, you will find that these bad points are very eye-catching and have a serious impact on the visual effect, because the LCD bad points are strictly controlled. We currently mean that the screen is in every color (not just black screen or white screen ),The real screen has no bad points, including black screen, white screen, blue screen, green screen, red screen, light blue screen, light green screen, pink screen, and so on, this verification authority of our company was only available in the dark., Causing distress, a large number of orders were postponed, here to the customers ordering last week, I hope you can understand our pain points.

Sometimes this machine reaches 18 to pick out one, very worried, maybe our inspection standards are quite strict. (most of the dark spots can be seen only after more than three inspections are performed by our own inspectors)

Therefore, this practice is quite distressing to our company and our suppliers, so I hope you can speak enthusiastically and express your own opinions.