What is the difference between dead pixels and bright spots in liquid crystals? 30

Liquid crystal highlights, the introduction of bad pixels: the LCD panel is cut by a whole board, each pixel of the LCD is composed of red, green, blue3 pixel units, you can abstractly see the liquid crystal as a video wall that displays the picture, but each TV can only display a complete pixel, and each pixel unit corresponds to its own drive tube. Due to the problem of resolution, it is inevitable that the driver tube will be damaged during the production process of the LCD panel, and when the driver tube is damaged, then the corresponding pixel will be missing a color unit.

At this time, there are bright spots or dark spots when the liquid crystal is displayed, and these points are what everyone usually calls the liquid crystal dead pixels and bright spots. To put it simply, the bright spot is just the point where the LCD panel lacks a color, and the point will not affect other points, and the bad pixel is a more serious point than the bright spot, which not only makes the liquid crystal lack a color point, but also affects other points, and the diffusion characteristics of the bad pixel will cause other normal points to become bright spots or bad pixels.

The difference is obvious, the bright spot is a "white or colored dot with the size of a soybean" on the screen, and the dead pixel is also a dark dot, and "the black or dark dot is the size of a soybean".

I've been taught, and I'll study on the first floor. LCDs have bright spots and dead pixels. So what people usually call the scotoma is the scotoma?

Categories: Computer, Networking, >> Hardware.

Problem description: What are the bright spots and dead pixels that LCD says?

Analysis: Liquid hall crystal screen is common"Point defects"It can be divided into three types: dead pixels, bright spots, and dark spots.

The r, g, and b (red, green, and blue) dots that appear on a black screen are called bright spots.

The appearance of bright spots is divided into two cases:

In the case of a black screen, the point of simply rendering the color of R or G or B is rendered.

Red dot under a black screen.

When switching to red, green, and blue display mode, there are only white dots in one display mode in R, G, or B, and there are other color dots in the other two modes, which means that there are two bright spots in the same pixel.

A dot that is pure black in the case of a white screen or a dot that is pure white in the case of a black screen. This dot is always in the same position and is always a pure black or pure white dot when switching to the red, green, and blue display mode. In this case, it means that the pixels of R, G, and B are all damaged, and such points are called dead pixels.

Simply put, a pixel is solid or always black.

The imagination of the so-called bad pixel is the description of the bad pixel itself.

The disadvantage is not too serious, but it is not pleasant to watch.

Bad pixels are prevented from the beginning of purchase.

With the continuous decline of liquid crystal display (LCD), liquid crystal display has become the mainstream choice of many netizens when configuring or upgrading. Merchants often use more gorgeous images when showing you LCDs, and many readers take them home to use the LCD after buying them, only to find that there are multiple dead pixels or dark spots or bright spots on the LCD screen.

Find the merchant to change it, the merchant said that it is normal to have 5 or even 15 dead pixels on the LCD screen, and refused to replace it. Therefore, before buying an LCD monitor, it is better to know more about the bad pixels of the LCD display and learn more about the ways to identify the bad pixels.

First of all, you have to understand what the bright spots and the bad pixels are:

Highlights: Whether the screen is black or white, it is always bright, it can be a colored dead pixel: whether the screen is black or white, it never lights up.

Turn the LCD TV to full white, **dark dot is bad dot.

Turn the LCD TV to all black,**The black dot is the bright spot,For observing the white bright spots,**Other colors are the bright spots,**The red bright spots cannot be observed Turn the LCD TV to all green,**The other colors are the bright spots, and the green highlights cannot be observed.

Let it display an all-white picture, use the naked eye to see which point is not bright is the dark point, adjust it to all black to find the bright spots, and adjust it to pure red, yellow, and blue respectively, you can find out the color point, which is more troublesome. If possible, connect the TV to the computer and run some detection tools to detect dead pixels.