What Is The Performance Of A High-quality Full-color LED Display?

- May 23, 2019-

What is the effect of the high-quality, high-quality full-color led display? Today we will talk about the high-quality, high-quality full-color led display with display effects, mainly from screen brightness, viewing angle,


Color uniformity, gray level, resolution and other aspects.


1, full color led display screen brightness

 

High-quality full-color led display brightness has a standard, indoor full-color led display brightness index is ≥1000cd/m2--≥1600cd/m2 and the screen brightness can be automatically adjusted, the indoor full-color led display brightness will be based on

 

The light in the indoor environment is automatically adjusted to the brightness of the current environment. Outdoor full color led display brightness index minimum ≥4000cd/m2, highest ≥8000cd/m2, can be viewed under strong light, general outdoor full color LED

When the display is installed, the display and the front of the light will be avoided, and there is no need to worry about the reflection. The high-quality full-color led display mask adopts the novel black technology lamp bead mask, which is used to avoid the outdoor full-color LED display.

The screen reflection is designed to affect viewing.

 

2, the maximum viewing angle design

 

"Visual angle" refers to the angle at which the user can clearly observe all the content on the screen from different directions. The larger the viewing angle of the full-color led display, the better. Generally, there are two viewing angles on the full-color led display.

Indicator: Horizontal and vertical, the horizontal viewing angle is based on the vertical normal of the display (ie, the vertical imaginary line in the middle of the display), and can still be normal at a certain angle perpendicular to the left or right of the normal. of

Seeing the displayed image, this angle range is the horizontal viewing angle of the LED display;


Similarly, if the horizontal normal is taken as the standard, the upper and lower viewing angles are called vertical viewing angles. In general, the viewing angle is based on contrast changes. When the viewing angle is increased, the contrast of the displayed image seen at the position will decrease, and when the angle is increased to a certain extent, the contrast is reduced to 10:1, which is the maximum viewing angle of the full-color LED display. The viewing angle of the star-color full-color led display can reach 160° vertical and 160° vertically. The viewing angle is mainly determined by the die packaging method, so it must be carefully considered when packaging the die. In addition, the viewing angle has a lot to do with your viewing angle and distance.

 

Note: If you customize the angle according to the situation on site, the cost will be high. In addition, the same chip, the greater the angle, the lower the brightness of the full-color LED display.

 

3, color uniformity

 

The color uniformity of the screen display is the delicate feeling of the picture we often say. The color uniformity is literally meaning that the color is even, the black is black, the white is white, the color block is not blurred, as long as the color uniformity is up to standard, the general full color LED display The screen HD screen is fine.

 

4, gray level

 

The full-color led display is a kind of LED display with rich colors. It consists of three primary color (red, green, blue) display unit plates, and 256 gray levels of red, green and blue each constitute 16,777,216 colors, which makes the full color display rich in color, high saturation, high resolution, Display a dynamic image with a high frequency. The full-color led display grayscale is also called the gradation or grayscale, which refers to the brightness of the brightness. For digital display technology, grayscale is the determining factor in the number of colors displayed. Generally speaking, the higher the gray level, the richer the color displayed on the display screen, the finer the picture, and the more detailed the details.


The gray level of the full color led display depends mainly on the number of A/D conversion bits of the system. Of course, the system's video processing chip, memory and transmission system must provide support for the corresponding number of bits. At present, the domestic LED display mainly adopts an 8-bit processing system, that is, 256 (28)-level gray scale.

 

A simple understanding is that there are 256 brightness changes from black to white. RGB × 256 × 256 = 16,777,216 colors can be formed by using RGB three primary colors. That is, the so-called 16 mega color. The international brand display mainly adopts a 10-bit processing system, that is, 1024-level gray scale, and RGB three primary colors can constitute 1.07 billion colors.


Although grayscale is the determining factor determining the number of colors, it does not mean that the larger the limit, the better. Because the resolution of the human eye is limited first, the increase in the number of bits processed by the system will involve changes in the system video processing, storage, transmission, scanning, etc., and the cost will increase sharply, and the cost performance will decrease. Generally, 8-bit systems can be used for civilian or commercial-grade products, and 10-bit systems can be used for broadcast-grade products.

(About the full-color led display grayscale details)

 

5, resolution

 

The resolution of the full-color led display is written in the full-color led display parameters. The higher the resolution, the higher the resolution, just like the resolution of a computer monitor, and the high screen effect is good.

 

According to the above information, the customer can choose HD full-color led display. Whether the standard can be used to distinguish whether it is a high-definition led display.