What does P3.91 stand for?
P stands for Pixel Pitch. 3.91 means, the center distance between two lamp beads is 3.91mm. in LED display, the smaller the pixel pitch of the LED module, the higher the resolution, the clearer the picture, and the higher the corresponding cost. Taken together, P3.91 is a very cost-effective product among all LED displays.
Advantages of P3.91 LED display
- The 3840hz high refresh rate of P3.91 LED display can make the picture quality of LED display and video material playback clear and smooth, and easily catch the audience’s eyes.
- Compared to P2, P2.5 and other smaller pixel LED displays, the price is much lower. The mature and stable production process of this P3.91 LED display also reduces the failure rate and cost.
- Quick release cabinet structure makes the overall installation and maintenance are easier and simpler, single person can operate. Quick lock makes the overall LED display screen more flat and natural.
- Through precise CNC processing, the error is less than 0.01mm, the gap in the cabinet is greatly reduced, truly realizing seamless splicing.

P3.91 LED display function introduce
- Indoor and outdoor options
- Portable die-cast aluminum design
- High refresh rate reduces moiré
- Fast delivery in 3 day
What are the extended functions of P3.91 LED display?
- Increase the arc lock. Through the arc lock to make it has a curvature adjustment function, the arc range can be adjusted to -15 ° to 15 degrees, and finally assembled into a complete round LED display.
- Customized 45°beveled die-casting aluminum cabinet. The 45°beveled die-casting aluminum cabinet can realize 90°right angle wall mounting or design requirements, and assemble into a complete square column LED display.
- Magnetic suction design. When we add the front maintenance magnetic adsorption feature, the cabinet can be mounted and dismounted superfast in seconds.
- GOB technology mask. GOB(Glue on board), is a new type of glue encapsulation technology, this technology can effectively reduce the dust, moisture and other external factors on the display effect of the impact of the increase of GOB technology mask improves the impact resistance and waterproof performance of the LED display.


P3.91 LED display installation
Wall-mounted installation: one of the most common installation methods, requiring a steel structure to fix the LED display, which can support front and rear maintenance.
Suspended installation: suspended from a load-bearing beam above the ceiling or elsewhere by means of a hanging beam, the benefits of this installation are space-saving, easy to maintain, and save structural costs.
Mobile installation: this kind of installation is suitable for all kinds of rental activities or temporary performance activities, easy installation and transportation with flexibility and portability.
P3.91 LED display application scenes
- P3.91 LED display provides bright and vivid color images, which can be used in various indoor and outdoor application scenarios. It is mainly suitable for the following scenes:
- Concerts, theaters and other stage performances;
- Shopping malls, retail stores, trade shows and other occasions to promote products;
- Command centers, security monitoring stations, traffic management centers and other control rooms to ensure the display of key information; monitoring video and real-time data accuracy and reliability;
- Conference rooms, cultural walls and other corporate environments to disseminate information and promote brands;
- Effective tools for displaying and spreading culture in museums, nightclub, amusement parks and other recreational venues.

- Product Technical parameter
| Item | Product Technical parameter | |
|
Panel | Dimension | 250(W)*250mm(H) |
| Pixel pitch | 3.91mm | |
| Pixel Density | 65536/ M2 | |
| Pixel configuration | 1R1G1B | |
| LED specification | SMD1921 | |
| Pixel resolution | 64(W)*64(H) | |
| Average power | 16W | |
| Panel current | 8A | |
| PCB Fire rating | VO rate | |
| Panel weight | 0.65KG | |
|
Cabinet&Bracket
| Humidity | 10%-95%RH |
| Quantity of panel | 30 | |
| Hub connecting | HUB75 16pin | |
| Best viewing angle | Horizontal >170 Vertical>120 | |
| Best viewing distance | 3–30M | |
| Working temperature | -20-+60 | |
| Panel power supply | 5V40A | |
| Screen power supply | 220VAC/50HZ+_10% | |
| Max power | <800W/m² | |
| Average power | 400W | |
| power quantity | 200W/4PCS | |
| Technical parameter | Driving device | 16207Constant current drive |
| Drive type | 1/16 Scanning | |
| Refresh frequency | 3840 HZ/S | |
| Display color | 4096*4096*4096 | |
| Brightness | 800-5000cd/M2 | |
| Life span | 100000Hours | |
| Communication distance | <100M | |
In-depth analysis of P3.91 LED display
LED display industry is getting richer and richer in product categories and specifications, among which P3.91 LED display is very popular in the market and accounts for a relatively large market share. Today, let’s work together through the in-depth analysis of many aspects of P3.91 LED display to understand why it is so popular in the market.
What is P3.91 LED display
P3.91 LED display refers to the LED module splicing LED display with pixel pitch of 3.91mm.
Generally, the pixel pitch of indoor LED display is between 1.8mm~4mm, and the viewing distance of small pixel pitch is more suitable for indoor use.
The pixel pitch of LED display for outdoor use is between 4mm~10mm, the outdoor site is larger, the viewing distance of large pixel pitch is more suitable for outdoor.
P3.91 LED display is close to 4mm pixel pitch, which is suitable for both outdoor LED display and indoor LED display, therefore, P3.91 LED display is extremely suitable and has a large market share.

Features of P3.91 LED display
High pixel density
The pixel pitch of less than 4mm makes P3.91 LED display have high pixel density, the higher the pixel density, the richer the details of the screen and the clearer and more delicate the image.
High Brightness and Contrast
The brightness of P3.91 LED display indoors is usually in the range of 600~1000 nits, and the brightness of P3.91 LED display outdoors is usually in the range of 4000~5000 nits. The high brightness of P3.91 LED display makes the visibility of the LED screen image extremely high whether it is indoor or outdoor. It has high grayscale and high contrast for a more visible picture.
Accurate color reproduction
P3.91 LED display uses high-quality driver IC, it can adjust the LED light threshold is larger, the display is richer in color, more realistic and more detailed image color reproduction.
Wide Viewing Angle
LED display has a more stable picture display, so it can provide a wide viewing angle, no matter horizontal or vertical, P3.91 LED display can have a viewing angle of more than 160 degrees.
Quick Installation and Removal
The thin and modular design of the P3.91 LED display makes the installation and removal of the P3.91 LED display very simple and easy to use, which saves a lot of time and cost of manual installation, and avoids the installation process being too complicated resulting in physical damage to the P3.91 LED display.
Why is P3.91 LED display so popular?
Moderate Viewing Distance
Usually the suitable viewing distance of LED display is more than 1~2 times of the pixel pitch value, and the suitable viewing distance of P3.91 LED display is 4m~20m, which is very suitable for both indoor and outdoor, so most of the outdoor or indoor LED displays will choose P3.91 LED display.
Cost Effective
More Smaller pixel pitch means higher bead density and more expensive. If you want 1.8mm or 2mm pixel pitch LED display, but the budget is not enough, you can choose P3.91 LED display, which has the same high definition, but the price will be cheaper.
Stability and Durability
P3.91 LED display made by JYLED usually uses Nationstar LED beads, which are of high quality, good quality, stable performance and long service life.
Flexible Installation and Maintenance
P3.91 LED display is available in front maintenance, rear maintenance, and front and rear maintenance at the same time support products, the maintenance of P3.91 LED display is more flexible, you need to make a choice according to your installation environment and needs.
And its module is highly integrated with a variety of accessories, if there is a failure, directly replace the spare module can be, do not need to purchase additional accessories to consider how to install the replacement.
Modular design
Modular design makes the production and installation of P3.91 LED display more organized. During the production process, the stable and repetitive operation guarantees a more uniform quality of the LED module, and the modular design makes it easy to splice the cabinets together when installing the P3.91 LED display without going through too much checking and calculating.
Thin and light
The thin and portable design of P3.91 LED display makes the cabinet thickness of P3.91 LED display around 80mm and weight around 13kg. The thin and light LED cabinet is more convenient for transportation, easier and faster to install, saves space, and saves the labor cost of installation.
Energy saving and environmental protection
LED’s optical conversion efficiency is up to 90% or more, heat loss accounts for a small percentage, so the P3.91 LED display is very energy efficient and has a long service life.
The materials used to produce P3.91 LED display are also harmless and non-polluting, healthy and environmentally friendly.
Special Heat Dissipation Structure
Some cabinets of P3.91 LED display are made of aluminum, which has better heat dissipation, and the LED cabinets are designed with vents, so you can directly use the vents to dissipate the heat without arranging fans for heat dissipation.

Different types of P3.91 LED display
Rectangle P3.91 LED display
Rectangle P3.91 LED display is the most widely used and common one, it is suitable for almost all the scenarios, no matter it is for performance, advertisement or meeting, etc. Rectangle P3.91 LED display is able to provide clear picture and vivid color. Even when viewed from a close distance, the image is still clear and not pixelated.
Curved P3.91 LED display
The curved P3.91 LED display is available in both inner and outer curved modes.
The inner curved P3.91 LED display allows the viewer to see from the inside, where the viewer is completely wrapped up in the LED display and has an immersive viewing experience.
The outer curved P3.91 LED display supports viewers to view from the outside, with a wider viewing space, no limitations, and a wider viewing angle.

Right Angle P3.91 LED display
The Right Angle P3.91 LED display has LED cabinets with edges designed at a 45-degree bevel, a design that allows two cabinets to be spliced together at a 90-degree right angle.
This screen is mostly used for LED screen splicing on 2 walls, allowing adjacent walls to be seamlessly spliced into a single LED screen whole.
Transparent P3.91 LED display
Transparent P3.91 LED display can be installed on glass curtain walls, floor-to-ceiling windows, and other transparent surfaces. It is characterized by the fact that, in addition to powering up to display images, the rest of the time the transparent P3.91 LED display and the building and the surrounding environment almost blend into one, you can hardly feel its presence, but when it However, when it displays the image, it will give people the illusion of a three-dimensional image suspended in the air, bringing strong visual shock.
P3.91 LED display can be combined with which intelligent technology
Interactive display
Combined with the touch sensing design, it can make P3.91 LED display have an interactive experience with the viewers, which can attract the viewers to watch the content more, and in the interaction with the viewers to learn about his interest in the intention, and to deepen the impression of his viewing of the content.
Remote Management
In addition to the on-site control of the video processor to manage the playback content of the P3.91 LED display, you can also use some software to manage it remotely to adjust and control its playback content easily and quickly.
Automatic Light Sensor
Connecting the P3.91 LED display with an automatic light sensor also allows you to adjust the screen brightness according to changes in ambient light, which ensures that the screen brightness is sufficient for displaying images and saves energy at the same time.
Multiple Connection Inputs
The P3.91 LED display supports a wide range of port connections. Simply by matching an excellent video processor, the P3.91 LED display is able to synchronize the playback of both created content and real-time captured content.
Where is P3.91 LED display suitable for
Commercial windows
Installing a P3.91 LED display on commercial windows, its high-definition and vivid image will make consumers notice the video content played at the first glance, and it can accurately convey the product information, so that consumers will no longer miss the related activities.
Exhibition Display
Museums, exhibition halls and other venues, the audience’s viewing distance is basically within 10 meters, very consistent with the viewing distance of the P3.91 LED display, through the P3.91 LED display to display cultural relics or art-related products, the beauty of art and culture can be shown to the audience to the fullest.
Outdoor billboard
For outdoor, the pixel pitch of 3.91mm belongs to a very small pixel pitch, P3.91 LED display as outdoor advertising LED display screen, than the general outdoor advertising screen screen picture is more clear, better picture quality, better performance.
Public places
Similar to some terminals, waiting halls and other public places, the use of P3.91 LED display as a notice board for information display is a very ideal choice, it can accurately and clearly convey the flight information or the number of trips, to avoid the user to miss the journey.
Stage Background
For entertainment shows, parties, music stages and other scenes with performances, using P3.91 LED display as a stage background can adjust the picture and lighting according to the different programs, rendering the stage atmosphere, allowing the audience to experience the stage performance in a more immersive way, and enhancing the sense of experience and happiness.
Stadium
The audience in the stadium is very enthusiastic and engaged. Using P3.91 LED display as a re-enlarging screen for the highlights of a tournament can stir up the excitement of the audience even more, and it can also be used to play some sponsor advertisements during the breaks of the tournament to make some advertising money.

Factors to consider when choosing a P3.91 LED display
LED beads
The quality and performance of the LED beads determine the color richness, brightness and stability of the subsequent P3.91 LED display.
At present, the most famous LED bead manufacturers are Kinglight and Nationstar, of which the quality of Nationstar LED is the best and of course, the price will be more expensive, while the quality of Kinglight LED will be a little bit worse than that of Nationstar LED, but the quality is also guaranteed to a certain extent, and the price is cheaper.
LED Module
LED module contains LED beads, PCB board and driver IC, the driver IC can control the brightness and refresh rate of P3.91 LED display, which is closely related to the subsequent display effect and smoothness.
Cabinet Size
Larger cabinets assembled with P3.91 LED display are purchased in smaller quantities and may cost less, smaller cabinets assembled with P3.91 LED display are purchased in larger quantities and may cost more, but smaller cabinets are more convenient to install and transport, larger cabinets are stronger and heavier, and more manpower is needed for installation.
Small cabinets are more convenient and large cabinets are more suitable for large scale LED display, you need to choose according to your expectation.

Maintenance method
If your expectation is a small-scale LED display, of course, is to choose the front maintenance LED display is more convenient and suitable, and the front maintenance means that the volume of the LED display is more lightweight, do not need to reserve the rear maintenance channel.
If your expectation is a large-scale LED display, then it is recommended that you choose rear maintenance LED display, because large-scale LED display must have rear maintenance access, so directly choose rear maintenance LED display may be more cost-effective.
Installation Location
The installation environment of the LED display is also important, which determines the brightness and protection level of the LEDs.
The brightness of indoor P3.91 LED display should be lower, and the protection level can reach IP32 basically, while the brightness of outdoor P3.91 LED display needs to be very high, even if it faces the sunlight, it also has visibility, and in addition, it needs to be waterproof and dustproof, and the protection level needs to reach IP65.
Conclusion
P3.91 LED display can stand out in the market, which can’t be separated from its pixel pitch. The P3.91 LED display stands out in the market due to its wide range of pixel pitches and excellent picture display.
It strikes a good balance between performance and cost and can be used both indoors and outdoors, so whatever the scenario, you can never go wrong with the P3.91 LED display.
| Module | Pixel Pitch | Pixel Density | Cabinet Flatness | Brightness (Indoor) | Brightness (Outdoor)) | Power Consumption | Refresh Rate |
| P3.91 | 3.91mm | 65749dots/㎡ | ≤0.02mm | 500~1000 nits | 4000~5000 nits | 250~800w/㎡ | ≥1920HZ |
Usually, the pixel pitch of indoor and outdoor LED display is divided by 4mm, and the pixel pitch larger than 4mm is more suitable for outdoor use, while the pixel pitch smaller than 4mm is more suitable for indoor use.
And 3.91mm is very close to 4mm, so 3.91mm pixel pitch is suitable for both indoor and outdoor use.
The truth is that there is no such thing as the best pixel pitch or the worst pixel pitch in the world.
- When we hold an outdoor event, the audience viewing distance is between 10 meters and 50 meters, then the most suitable LED display is 10mm pixel pitch LED display.
- When we hold a meeting indoors, the viewing distance of the meeting room is between 2 meters and 6 meters, then the most suitable LED display is 2 mm pixel pitch LED display.
- When choosing the pixel pitch of LED display, there is no best pixel pitch, only the most suitable pixel pitch, whether P3.91 is a good pixel pitch or not depends on whether your demand is compatible with it.
The difference between P3.91 LED display and P4 LED screen lies in the pixel pitch, the pixel pitch of P3.91 LED display is 3.91mm, and the pixel pitch of P4 LED screen is 4mm, although the difference between the two is not big, but in general, the pixel pitch of P3.91 LED display is smaller, and under the same size, the P3.91 LED display has higher resolution.
LED displays are usually shipped with the LED modules directly spliced into the cabinet, and the LED cabinets have quick-locking devices, which make the installation of LED displays very easy and fast through these quick-connect and locking designs.
Moreover, the P3.91 LED display’s cabinet is individually lightweight and can be easily lifted by one person, which also saves a lot of trouble for installation.
Whether it is for entertainment performances, sports competitions, art exhibitions, education and many other industries, the P3.91 LED display is perfectly adapted to the display needs of these events, which has something to do with the fact that its pixel pitch is suitable for indoor as well as outdoor use, and that it is always able to provide excellent display performance.
P3.91 LED display is very suitable for advertising media, its picture is clear, it can convey the publicity information completely and clearly, and if you need to change the publicity content, you can change it with one click through the video processor, it does not need to spend more time.
In the long run, the service life of P3.91 LED display is extremely long, using it to broadcast advertisements for a long time to obtain the revenue far exceeds its cost.
LED display has a longer service life than LCD and OLED, more stable performance, lower subsequent maintenance cost, and LED screen is more energy efficient and consumes less power.
The brightness of LCD and OLED is lower and not applicable with outdoor, while the brightness of LED screen is able to display normally regardless of indoor and outdoor, if you have the need to purchase a display, LED is undoubtedly an ideal choice.
Generally, the life of LED display is very long and durable. If you want to make your LED display last longer, you can pay attention to the following points:
Pay attention to the installation force during installation to avoid the damage caused by physical impact to the P3.91 LED display.
Clean and maintain the LED display regularly to avoid the impact of dust on the LED electronics.
P10 LED display is cheap but with low resolution and long viewing distance, P1 LED display has high resolution and close viewing distance but is more expensive, unlike the pixel pitch which is extremely prominent in these characteristics, P3.91 is a more centered number that strikes a good balance between resolution and price.
Therefore, P3.91 LED display has a wide range of applications, and you don’t need to worry about the problem of unsuitable requirements.
Most of the P3.91 LED screens on the market are manufactured using SMD encapsulation technology, SMD technology is a mature and stable process, small investment costs, high quality output LED module, is a cost-effective encapsulation technology, the mainstream encapsulation technology of LED display on the current market is SMD technology.
If you have the demand for P3.91 LED screen, you can totally consult JYLED, as a LED production manufacturer for more than ten years, we have rich experience, senior technicians and excellent product quality.
You can put forward any requirements, our technicians will make a detailed program for you.
The resolution is related to the size of P3.91 LED display, the bigger the size and the more pixels, the higher the resolution of P3.91 LED display.
The screen brightness of outdoor P3.91 LED display is 4000~5000 nits, and indoor P3.91 LED display is 500~1000 nits.
The best viewing distance of LED display is usually 1–2 times of the pixel pitch figure, so the best viewing distance of P3.91 LED display is 3.9m to 7.8m, in this distance range to watch P3.91 LED display, the picture is clear and delicate, the picture quality is very high.
Generally, the driver IC of P3.91 LED display can realize constant current 1/16 scanning.
The driver ICs used for P3.91 LED display are ICN2037, ICN2038, ICND2152, ICN2038S, 2049, 6363, 2069 and so on. Different driver ICs have different performance and realize different refresh rate, The better the performance of the driver IC, the higher the refresh rate, the smoother the screen playback, and the better the quality of the driver IC will also be more expensive.
The main components of P3.91 LED display are P3.91 LED module, LED cabinet, control system, power supply system and cooling system.
Depending on the material used to produce the LED screen, the power consumption is different, basically the power consumption of P3.91 LED display is 250~800w/㎡.
P3.91 LED display can be controlled by synchronous control system, asynchronous control system and cluster control system, you can pick the control system according to the application and demand.




