What is the relationship between LED scanning mode and refresh rate?
LED scan mode and refresh rate both affect the display effect of the LED display, they are not the same way of influencing, but also interact with each other, today I will take you to explore the relationship between them.
What is the LED scanning mode
LED scanning mode is also known as the scanning rate and scanning driver IC, LED scanning rate is the LED module on all the driver IC and LED module of the total number of chips interact with each other and come up with;
each pixel is composed of three different color chips, and LED pixels need to be connected to the driver IC on the PCB, so the LED module driver IC can scan to the range of pixels, the LED module driver IC can scan to the range of pixels, the LED module driver IC can scan to the range of pixels.
The common scanning modes on the market now are 1/2 scan, 1/4 scan, 1/5 scan, 1/8 scan, 1/16 scan, etc. The lower the scanning speed means the higher performance of the whole LED module.
What is the LED display refresh rate
LED display refresh rate in hertz (Hz) as a unit, we common LED refresh rate 960Hz, 1920Hz, 3840Hz. LED display refresh rate is by each LED lamp beads in a second after hundreds of thousands of times constantly lit, this speed is very fast, our human eyes can not capture it every time they change.
LED display refresh rate can improve the smoothness of the display, so that we can watch the LED image more smooth, no flicker and thus more clear, on the other hand, can also effectively reduce visual fatigue, but in terms of picture quality and color display refresh rate can not be involved.
How to Calculate LED Module Scan Rate
Normally, each driver IC has 16 pins, so it can drive up to 16 LED chips.
For example, the LED module you need to calculate now has 24 driver ICs on it, and each driver IC can only have 16 pins, so we can calculate that this LED module has 24×16=384 LED driver IC pins.
Subsequently, we have to calculate how many LED chips are on this LED module:
For example, for P5 LED module, we use 160x160mm LED module size to calculate, i.e. 160mm/5mm=32mm, so the module has 32×32=1024 pixels, however, there are 3 color chips in each chip (1 red chip, a green chip, a blue chip), so the P5 LED module has 1024 x 3 = 3072 LED chips.
LED module scanning rate = total number of pins owned by the module/total number of chips in the module:
i.e., the scanning rate of 160x160mm size P5 LED module is 384/3072=1/8
Two common LED scanning modes
Static Scanning
Static scanning is the output from the driver IC to pixel points on the LED module, which realizes the point-to-point control. Static scanning can reduce the loss of brightness to a large extent, so as to be able to have an excellent display picture. In the assembly of static scanning, the connection between the components of the whole LED display only requires 5-7 output data lines, which is enough to connect all LED displays;
this advantage is faster in installation and maintenance, which can save a lot of time; static scanning does not cause brightness loss, so it is often applied to large outdoor LED displays.
Dynamic scanning
Dynamic scanning utilizes the driver IC to output the content to the pixels of the LED module, which implements the point-to-column control. Dynamic scanning can control the whole column of pixels directly, thus reducing the cost of numerous high-quality dynamic scanning can be controlled by the circuit, so that the whole display image quality;
Dynamic scanning has a multifunctionality, can be connected with various sizes of LED modules, so as to manipulate the main control board, driver panel and expansion board.
Dynamic scanning in the operation of the use of power consumption is low, it uses a time-scanning display mode, so that it will be re-scanned every period of time, so the dynamic scanning power consumption is static scanning power consumption 0.4 times, compared to the dynamic scanning will be more energy efficient.
Common LED display refresh rate
960Hz: 960Hz refresh rate of the chip is more common, usually, for a second with a refresh rate of 960Hz, the human eye will not be able to capture the display of the content of any change; however, when you use your cell phone’s camera to take pictures, you will find that the LED display will appear some flickering phenomenon, this flickering will make human eyes feel very uncomfortable.
However, it is not that the 960Hz refresh rate display is not good, 960Hz can also display a very clear picture, so that the LED display has a uniform image display, its performance is not as good as a higher refresh rate, but for some people with limited budget, 960Hz refresh rate display is very worth investing in.
1920Hz: the refresh rate using a double phase-locked driver chip, commonly used in outdoor LED display, suitable for viewing the distance of the LED display, generally can be installed in the 10m-150m; for the LED outdoor billboards, and office building LED wall and so on this kind of need for long-distance viewing of the LED display, the use of the 1920Hz will be enough.
Because the 1920Hz is suitable for the majority of the standard application, for some people who only need to see a long distance, the 1920Hz is enough. Standard applications, for some only need to have a high refresh rate can solve the display problem of the application, 1920Hz is the most cost-effective choice.
3840Hz: when the LED display uses a higher quality driver chip PWM, the refresh rate can reach 3840Hz. The driver can bring higher refresh rate, smoother video and better performance for the LED display;
3840Hz refresh rate is very much needed to enhance the visual quality and can be clearly displayed in the application, it is more suitable for indoor applications, so that viewers can be It is more suitable for indoor applications, allowing viewers to see LED displays at close range.
3840Hz LED display has a wide range of applications, such as sports events, in the filming of the game can capture every moment of the action can be captured 3840 times a second subtle change; or in the case of racing, you can accurately capture the racing car racing every picture, or in the field of gaming can have a more high-performance game frame rate, so that the player can have a more comfortable experience.
7680Hz: For application scenarios that require high resolution and display content that moves very fast, 7680Hz is the most excellent choice. In the movie industry and naked eye 3D display technology and others advanced higher technology field, 7680Hz has become a historic trend, 7680Hz can effectively reduce the image or water ripples in the video, so it can be done in high technology naked eye 3D display content.
What is the difference between LED scanning mode and refresh rate
In terms of function, LED scanning mode is mainly used to control the brightness display of the pixels of the LED module and the way the chip is scanned, the lower the scanning rate, the higher the performance of the LED display will be. And the refresh rate of the high and low in the performance of the LED display screen affects the overall image of the overall image display. LED display scanning mode will directly affect the display of the brightness of the high and low, as well as the use of energy consumption, the higher the LED refresh rate, the viewer in the viewing of the image or video, you will get a smoother, more stable display screen.
In short, they interact with each other, they both work through the driver IC to achieve a better display, if the lower the LED scan rate, the higher the LED refresh rate, the combination of the two will be able to get a smoother, more uniform brightness of the image and so on.
Superior scanning rate in different applications to the audience with what experience
more superior scanning rate will affect the brightness of the entire display, it can get more accurate brightness management for the display, in the outdoor can achieve ultra-high brightness of the display, with the hot sun to fight, so that the audience in the viewer can get a clearer display, the color more realistic experience.
Brightness can also be controlled at will and helps to extend the life of the power supply, for example, indoors, where the superior scanning rate is not much brighter, thus realizing low energy consumption and enabling viewers to get a gentler display brightness.
How to choose the right scan mode and refresh rate?
LED scan mode and refresh rate both play a crucial effect on the whole LED display. They affect the brightness of the display, energy consumption, picture clarity and viewing comfort.
Therefore, it is very important to choose the right scanning mode and refresh rate, i.e. the lower the scanning rate, the better the performance, and the higher the refresh rate, the better the display effect. Of course, these are not the best, because some of the performance you will not notice when you use the LED display, but also add more and more purchase costs.
In a word, according to their own needs and budget, and then go to choose, such as the application of the display, brightness, refresh rate, power consumption and so on.