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64×32 dot P4 SMD1921 LED display module


High Definition Indoor LED Screen Solutions

P4 indoor LED module, also known as indoor P4 LED matrix, is a display panel that consists of thousands of tiny full-color LEDs that are illuminated together. This module is designed with a front black frame and back black PCB board which help it easier to offer lower reflection and better contrast. 

Building on superb SMT technology and black mask encapsulation, the P4 indoor LED panel maintains exceptional color uniformity and contrast. With up to 62,500 dots pixel density, 16-bit greyscale, and mid-scale brightness, it offers cost-effective video solutions while delivering excellent visual quality. Moreover, it features two IDC connectors on the PCB, which offer it the ability to be chained for easy connection and less cabling with one input and one output. In terms of resolution, the indoor P4 LED panel has two resolution options, the available resolutions include 2,048 dot pixels and 3,200 dot pixels.

Apart from the different resolutions, the Indoor P4 module has two size options to satisfy customer requirements. The first one is 256mm wide and 128mm high, containing  64×32 dot pixels.  The other one is 320mm wide and 160mm high, containing 80×40 dot pixels. Except for slightly different prices and scan rates, these two modules can provide almost uniform visual performance and eye-catching effects.

  • Resolution:  2,048 dots with 64×32 pixels or 3,200 dots with 80×40 pixels.
  • 4mm pixel pitch for better visual performance with good Clarity
  • Dimensions: 320mm x 160mm / 12.6” x 6.3” or 256mm x 128mm / 10.1” x 5.0”
  • Best for indoor, 160-degree visibility
  • 5V regulated power input
  • 1R1G1B full-color LED screen panel
  • Constant current 1/16 or 1/20 scan
  • 600-1,000 nits brightness.
  • Highly stable driver ICs for better color uniformity and vibrant images
  • Designed with the latest SMD 1R1G1B encapsulation, offering excellent full color present.
  • High contrast ratio of 5000:1 to deliver vibrant colors.
  • High refresh rate with over 1920hz to 3840Hz to allow flicker-free
P4 indoor 256×128mm LED screen module

Key Features

The indoor P4 LED panel has many other outstanding features such as long life, support for various content formats, synchronous and asynchronous control, brightness adjustment, and more. Overall. It is designed for various indoor environments to light up facilities.

LED module pixel pitch

Pixel Pitch

The P4mm indoor LED screen module takes performance even further thanks to the 4mm pixel pitch that produces higher pixel density, higher output, and higher definition
LED module refresh rate

Refresh Rate

Using of class-leading LED driversmakes it much easier to raise the refresh rate to 1920Hz or even to 3840Hz. further improving the video smoothness and offering a flicker-free visual performance and view experience.
LED module resolution


High density bright LEDs (with 2,048 or 3,200 dots per panel) boast a perfect color output, offering better visual effect with full color RGB present.
LED module brightness


P4 indoor LED display panel has been optimized and offers a comfortable brightness (1,000Nit) for the indoor environment, while maintaining HD and energy-saving.

SMD Encapsulation

With ultra-high LED density, it is child's play for the P4 indoor LED panel to create Full HD screens. What's more. it ensures the panel has the ability to allow the viewers to have a great enjoyment at close range.
LED module driver IC

Driver IC

Employing current driver ICs such as MBI5124, ICN2053, ICN2038S, and FM6153 ensures high refresh rate and high greylevel, eliminating flickering and guaranteeing the stable operation.
Black Frame Mast LED module

Full Black Techology

The integration of black LEDs, a black PCB frame, and a black mask effectively reduces light reflection, enhances contrast, ensures color consistency, and provide truer color representation

Wide Viewing

The P4 indoor LED module provides up to 160 viewing angles to minimize viewing blind spots and maximize visual coverage.
LED module contrast ratio

High Contrast

With a remarkable contrast ratio of 5000:1, the LED module delivers vibrant colors, crystal-clear images, and strong light-to-dark contrasts.

Better Visual Effect

The P4 indoor LED display panel features a high refresh rate, high viewing angle, and industry-leading LED technology,  enabling it to offer excellent quality output and make it ideal for making high-definition LED video walls.

better display effect of common cathodel led screen

3 IN 1



Contrast Ratio


Refresh Rate



HD Visual Performance

Small pixel distance with only 4mm. Lower pixel pitch means higher LED density, higher resolution, and sharper output.

256×128mm indoor P4 LED screen module

SMD Techology

Employing the innovative SMD 3in1 encapsulation, each pixel is a marvel of engineering, harmoniously blending red, blue, and green LED chips to create an uninterrupted, dynamic visual canvas.

256×128mm P4 indoor LED display module

High Resolution

High-density bright LEDs (2,048 or 3,200 dots per panel) boast a perfect color output, offering better visual effects with full-color RGB present.

320×160mm indoor P4 LED screen module

High Refresh Rate

Carefully selected LED drivers s allow P4 LED panel to deliver high refresh rates up to 3840Hz, resulting in flicker-free operation in module applications.

320×160mm indoor P4 LED display module

Two Sizes Available

Two different sizes of 256*128mm and 320*160mm for chose.

256×128mm Series

The indoor P4 64×32 LED module is one of the most cost-effective products and offers a refresh rate of over 1920hz and a brightness of over 1000nit to meet the needs of various in-door installations. Moreover, a full black LED mask cover is used to provide lower reflections to enhance overall contrast and consistency. In terms of viewing, this module offers a viewing angle of up to 160 degrees, allowing it to be oriented to a wider audience to maximize advertising benefits.

320×160mm Series

The indoor 320×160mm series P4 LED panel has 3,200 dot pixels placed on a 40×20 matrix panel. The module is encapsulated by SMT technology with up to 3,200 full-color LEDs placed on a matrix of 40 rows and 20 columns, and offers a high pixel density of 62,500 dots per square meter, resulting in excellent contrast and stability. Also, the standard size design makes it easy to replace old LED displays.


LED display module power cables

Power Cable

Standard 4Pin Power Cables are included to connect the module and power supply.

LED display module flat cables

Data Flat Cable

Industry Standardized 16Pin LED Display flat data cable (signal cable) will be offered for free to save cost.

LED display module screws


Strong and durable fixing screws such as M3, M4 for installing indoor LED display module


Product Model P4mm-Indoor
Pixel Pitch4mm
Panel Dimension320(W)x160mm(H)
Pixel Resolution64×32 dot
80×40 dot
Pixel Configuration1R1G1B
LED specificationSMD 3in1
Scan RateConstant current 1/16 scan or 1/20
Hor. viewing angle160°
Vert. viewing angle160°
Best View Distance4m – 40m
Grey Level14 bits
Brightness600 – 1000 cd/㎡
Brightness Adjustment100-grade auto/manual-adjustment
Brightness Uniformity>99%
Input Voltage (AC) DC5V
Avg Power Consumption 250 W/m²
Max Power Consumption 580 W/m²
Operation Power Voltage 100-240V / 50-60Hz
Control System DVI card + Full color control card
Control Mode Synchronous & asynchronous available
Support Input VGA, Video, AVI, MOV, MPG, DAT, VOB etc.
Communication Options Wire Ethernet, Fiber Ethernet,RF wireless, GPRS
Frame Frequency >60 Hz
Refresh Frequency >600 Hz(adjustable)
Color Temperature 3500-9500 adjustable
Control Distance Ethernet cable 100m, optical fiber 5km
Lifetime>=100000 hours
Blind Spot Rate<0.00001
Working Temp(-20)-(+60) Celsius degree
Working Humidity10%-90%
Waterproof Rating (Front/Rear)IP65/IP54
Package TypeCarton/Wooden case/Flight case
Warranty2 years

Common Questions

The size is 320*160mm and 256*128mm. 

For the 320*160mm P4 LED module, the resolution is 80*40 dot, a total of 3,200 dot pixels. For the 256*128mm, the size is 64*32, total 2,048.

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