NO.4 More Explanation for LED Display
1.Digital Signage:
Digital Signage (also known as Digital Signage) is a means of communication based on the broadcasting of digital content through screens of various technologies and dimensions, and which are generally located in highly prosperous areas, combining the
2.What is a pixel?
The minimum light-emitting pixel of the LED display screen has the same meaning as the "pixel" in the ordinary computer display.Each LED light-emitting unit (point) in an LED display screen that can be controlled separately is called a pixel (or pixel size).
3. What is the resolution of the LED display?
The number of rows and columns of pixels in the LED display screen is called the resolution of the LED display screen. Resolution is the total number of pixels in a display screen, which determines the information capacity of a display screen.
4. How to calculate the optimum viewing distance of large LED screen?
L (Optimum viewing distance) = M (Point spacing) * 0.86 For example: P20DF Optimum viewing distance = 20 * 0.86 = 17.2m For various display devices, the optimum viewing distance should be the minimum distance that the human eye can not distinguish pixels.
5. What is the angle of view? What is the viewing angle?
Angle of view is the angle between two observation directions and normal direction in the same plane when the brightness of observation direction decreases to 1/2 of the brightness of normal direction of LED display screen. It can be divided into horizontal and vertical perspectives.The viewing angle is the angle between the direction of the image content on the display screen and the normal line of the display screen.
6. What does contrast mean? What role does it play in the big screen?
Under certain ambient illumination, the ratio of maximum brightness to background brightness of LED display screen; the higher the contrast, the better the visual effect.
7. What does gray scale mean?
Under the same brightness level, the technical processing series between the darkest and brightest of the display screen; also known as color depth, refers to the number of different brightness, red, green and blue have their own gray levels. In full-color system, it is generally 256 gray levels, which can produce 256X256 = 16, 777, 216 colors. It is called 24-bit color in PC and 8-bit system in LED display system.
8. Hot Line Backup Function
Receiving cards A and B can be used as input or output ports. They can be used for two computers to control one screen at the same time. When one computer is in trouble, another computer can automatically replace it. When one network line is in trouble, another network line can automatically replace it, so that the normal work of the display screen can be guaranteed to the greatest extent.
9. Pixel pitch and density
Central or Point pitch(Dot pitch) of Two Pixel Points in LED Display Screen;The number of pixels per unit area is called pixel density. The smaller the point pitch is, the higher the pixel density is, the closer the distance suitable for viewing is, the larger the point pitch is, the lower the pixel density is, and the farther the distance suitable for viewing is.
10. Interpretation of IP Protection Level for LED Display Screen
IP protection level is composed of two digits. The first digit represents the level of lamp dust separation and prevention of foreign invasion. The second digit represents the degree of sealing of lamp moisture and waterproof invasion. The larger the number, the higher the protection level.
