When we buy LED displays, we always see terms such as LED display refresh rate, grayscale, and contrast in the product specification of the merchant.
So what is the LED screen refresh rate? What effect will different LED wall refresh rates have on the display effect? This article will give you the answers.
There are currently two LED screen refresh rates in the display industry, 1920Hz refresh rate, and 3840Hz refresh rate. For some special application scenarios, the refresh rate of the LED display can reach 7680Hz.
What is their difference? Is the refresh rate of the display higher the better? Let’s read now!
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1. What is the LED Display Refresh Rate?
In simple terms, the LED display refresh rate refers to the times the electron beam repeatedly scans the image on the LED screen.
Its unit is Hz. The refresh rate represents the number of times the screen is refreshed per second.
The refresh rate is a parameter indicative of the LED display device itself.
And it is also an important indicator to characterize the stability and non-flickering of the LED video wall.
Therefore, the higher the refresh rate of the LED screen refresh rate, the better the stability of the displayed images and video images. So the refresh rate will affect the price of the display.
It is worth noting that the refresh rate and resolution restrict each other, so the LED display screen with high resolution and high refresh rate is more beautiful.
The higher the refresh rate, the faster the screen updates. The more stable the screen display, the smaller the visual flicker.
LED walls with low refresh rates will produce horizontal stripes when taking pictures. Flashing images at the same time can cause visual fatigue to the human eye.
What is the frame rate?
It is easy to confuse the concepts of frame rate and refresh rate.
The frame change frequency unit is also Hz, which refers to the number of times the picture information is updated per second. Simply put, it means how many frames per second the video has.
For example, when we watch a video on the LED screen, the images are still.
It is familiar with slides. Due to the visual dwell effect of human eyes, if the dwell time of the two pictures is shortened, the coherence of the video will be better.
The frame rate is generally 25Hz, 30Hz, 50Hz, 60Hz, etc. The higher the frame rate, the better the continuity of the changed image.
The frame rate of the program source and the led screen refresh rate will affect the image quality. The two are complementary.
For instance, we play a movie with a frame rate of 24Hz on a led video wall with a refresh rate of 3840Hz.
Then each frame of the movie is refreshed 3840/24=160 times by the display screen. The human eye cannot perceive such a fast picture flickering, so the fluency of the video on the led screen is good.
2. 1920Hz VS. 3840Hz VS. 7680Hz Refresh Rate
I believe that many users have encountered such a situation: for the same display screen, it is clear to the naked eye.
But when shooting with a mobile phone or camera, there are always some irregular stripes in the picture. It may be caused by the low refresh rate of the screen.
At present, in the LED display screen industry, two main display refresh rates are 1920Hz refresh rate and 3840Hz refresh rate.
The display screen with a 960Hz refresh rate has gradually faded out of people’s sight due to the flickering and shaking of the screen and the poor display effect.
2.1 Differences between 1920hz refresh rate and 3840hz refresh rate
(1) Display effect. The higher the refresh frequency, the faster the screen refreshes, and the clearer the image seen by the human eye.
The refresh rate of the high-brush display can reach 3840Hz, and the normal refresh rate is 1920Hz.
The difference between the two displays is indistinguishable to the naked eye when playing pictures and videos.
But it can be seen using mobile phones and high-definition devices.
3840hz refresh rate VS 1920hz refresh rate
(2) Shooting effect. The display screen with a 1920hz refresh rate will have obvious water ripples when the mobile phone takes pictures.
And the image will shake and flicker. However, the led video wall with a 3840hz refresh rate can meet higher shooting requirements, ensure the shooting effect, and reduce the phenomenon of water ripples.
(3) Visual experience. Flickering and shaking the screen will cause visual fatigue.
Prolonged viewing is not good for the eyes. Compared with 1920hz, 3840hz refresh rate led display is less harmful to eyes.
(4) Price. The higher the refresh rate, the better the corresponding IC and configuration quality.
The cost between the 1920hz refresh rate and the 3840hz refresh rate is different. You can choose according to your needs and budget.
2.2 Advantages of choosing 3840hz refresh rate
(1) The picture texture is clear and delicate, the color is vivid, and the degree of reduction is high. With high-quality program sources, the publicity effect is better.
(2) The 3840hz refresh rate can meet the shooting and photography requirements. A high refresh display is more suitable.
For example, some large-scale parties, press conferences, and other occasions need to be televised or broadcast live.
For example, when broadcasting NBA basketball games, the camera equipment needs to shoot the funnel-shaped LED video scoreboard. A high refresh rate led display can present a better picture effect.
(3) The high-brush display is more eye-friendly and less harmful to the eyes. The viewing experience for the audience is better.
(4) LED display with high refresh rate has gradually become the mainstream of the LED screen industry.
Application areas include conference rooms, party stages, command centers, exhibition halls, museums, gymnasiums, hotels, and other places.
Fine Pixel LED Display With 3840Hz Refresh Rate
In the field of film and television production and live broadcast, in order to obtain more detailed pictures (excellent playback or close-up shots), high-speed cameras with a frequency of more than 1,000 Hz per second are adopted.
At this time, for the LED display screen that will also be photographed, it is a big challenge to still be able to present continuous images (without black scanning lines) or continuous color levels under high-speed shutter speeds.
This is why LED displays used for live broadcasts or broadcasts require high refresh rates and high gray scales.
Currently, customers generally choose 3840Hz displays to obtain stable image effects. There will be no ripples or flickering when taking pictures.
The high refresh rate can effectively solve the smearing and blurring of images during fast motion. Make the video picture smooth and smooth by enhancing the clarity and contrast of the image.
3. 7680Hz VS. 120Hz: What’s the Difference?
With the development of virtual production LED display in film and television production, the LED refresh rate has developed to 7680Hz. The high refresh screen brings a smoother visual experience.
When understanding the refresh rate parameters of different types of screens, have you ever been confused by the two values of 7680Hz and 120Hz? Let’s take you to understand their differences.
(1) Difference Types of Screen
7680Hz is used for LED displays.
120Hz is commonly used in LCD/OLED backlit displays. For example, the current screen refresh rate of high-end smartphones is 120Hz.
(2) Imaging Principle
The LED display screen refreshes the picture by lighting up and extinguishing the light-emitting chips line by line, thereby forming a video-imaging effect.
LCD/OLED displays achieve coherent video imaging effects by quickly switching between different images per second.
7680Hz represents the scanning frequency of the display. It indicates that the light-emitting chip is refreshed 7680 times per second.
120Hz represents the frame-changing frequency of the display. In other words, the display refreshes 120 different frames in 1 second.
(4) Influencing Factors
7680Hz represents the refresh rate of the screen itself. It is determined by the driver IC and light board design.
120Hz represents the frame rate of the film source. It is determined by the media itself and the graphics card.
High resolution LED display provides smoother pictures and better shooting effects.
It not only brings users the ultimate smooth visual experience but also can adapt to the extremely high requirements for display screens in different current application scenarios.
XR, virtual production LED wall, immersive experience check-in, etc. have gradually become hot market applications. These scenarios have higher requirements for LED wall refresh rate.
4. How to Improve LED Screen Refresh Rate?
Through the above information, we have understood the importance of led screen refresh rate to image quality.
So how to get a high led screen refresh rate? How to get a high-resolution led display screen?
More LED display manufacturers use high-brush PWM driver ICs to improve the refresh rate of LED displays.
Regular displays can reach a 1920hz refresh rate. A fine pixel pitch led display can reach a 3840hz refresh rate.
High-quality driver ICs help achieve high refresh rates, gray levels, and image expressiveness. With the advancement of driver IC manufacturers’ technology, mid-to-high-end LED displays have been able to achieve a balance between the three aspects.
5. Is the Higher the LED Wall Refresh Rate the Better?
Is the higher the refresh rate of the full-color led display, the better? The answer is no. The way of use is different, and the focus on the performance indicators of the led screen is also different.
Firstly, for the naked eye, the visual refresh rate above 60Hz has been perceived as a continuous picture, but the viewing experience with a high refresh rate is indeed better.
When the refresh rates of video sources and LED screens increase simultaneously, it is difficult for the human eye or even high-speed cameras to catch the flicker.
Therefore, high frame rate video sources played on a high refresh display can greatly improve the stability of frame changing and achieve a 1+1>2 display effect.
Secondly, the cost of high-brush LED screens is higher than that of low-refresh LED screens. The high-brush led screen can meet the needs of close-up photography, lens playback, etc.
6. What Affects the LED Display Refresh Rate and Gray Scale?
As we all know, the quality of the core components of the LED display will directly affect the display effect of the screen. For example, power supply, driver chip, LED lamp beads, etc.
For the refresh rate and gray scale of the LED display, the LED driver chip directly determines the visual performance of the display.
Among the current LED driver chips, the latest technology is “ScrambledPWM (S-PWM) technology”.
S-PWM technology is a technology that improves the traditional pulse width modulation (PWM). into several shorter on-times to increase the overall visual update rate.
The LED display screen of the S-PWM driver chip is photographed with a high-speed shutter of a digital camera, and there will still be no horizontal black scanning lines and color block distribution.
Its visual refresh rate and grayscale performance are far superior to LED displays using traditional switch-type driver chips.
This article has compiled some information about the led display refresh rate for you. It includes a comparison of two led screen refresh rates: 1920hz refresh rate and 3840hz refresh rate. If you have any questions about the led display, contact us.