LED display control system solution manufacturers | LCD Digital Signage Multi-Screen Splicing Playback for LCD Poster

Multi LCD screen splicing playback by Huidu Technology Cloud Platform, it use Android motherboard HD-M21 control system.





+86 18007554646


+86 18007554646


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Ⅰ. Overview

HD-M21 is a well-built all-in-one motherboard, using Rockchip RK3288 quad-core chip solution, equipped with Android 7.1.2 system, the main frequency is up to 1.8GHz, with super performance. Adopts Mali-T764 GPU, supports AFBC (Frame Slow Slave Compression), 4K/H.265 hard decoding, 1080P video decoding, HDMI interface 4K output, 4K video playback. Supports infrared remote control, Wi-Fi, RJ45 and other rich interfaces to make the product more versatile. It is widely used in advertising, interactive all-in-one, security, medical, transportation, finance, industrial control and other intelligent control fields, which can accelerate Product development cycle. Due to its hardware platform and Android's intelligent characteristics, when it is necessary to perform human-computer interaction and network device interaction, it can be used on the smart terminal motherboard, which can become your best choice.

M21 is standard with 2.4GHz frequency Wi-Fi module (optional 5GHz frequency), supports Bluetooth 4.2, support sending programs via Bluetooth.


Ⅱ. Features

l  High performance. Uses a quad-core ARM Cortex-A17 architecture, the main frequency can be as high as 1.8GHz, compared with the single-core, dual-core, and quad-core solutions common in the market. It has a qualitative leap in performance, can play high-definition video in various formats, and can handle complex interactive operations.


l  High stability. RK3288 Android integrated board, in hardware and software, add your own unique technology to ensure the stability of the product, can make the final product 7 * 24 hours unattended.


l  High integration. RK3288 Android integrated board integrates Ethernet, EDP, Wi-Fi, power amplifier, TF expansion card, USB expansion port, IR remote control function, HDMI, LVDS, backlight control, microphone and other functions, greatly simplifying the overall design.


l  High scalability. SIX expansion USB ports (4 ports are PIN type, 2 ports are standard type), 2 serial ports + 1 expandable debug serial port, five IO expansion ports can expand more peripheral device.


l  High definition. Supporting various LVDS / EDP / HDMI interfaces and cropping screens of various sizes and resolutions.


l  Perfectly support multiple mainstream touch screen functions such as multi-point infrared touch, multi-point capacitive touch, multi-point nano film touch, multi-point acoustic wave touch, multi-point optical touch, etc.

Chapter II Specifications

Ⅰ. Basic Parameters

1. Hardware Parameters

Hardware   specifications




RK3288, Quad-core, the highest frequency 1.8GHz,Android 7.1.2




Mail-T764 GPU MP4 Quad-core GPU

Supports OpenGL ES1.1/2.0,OpenVG1.1,OpenCL




DDR3, 2GB by default


Built-in storage   capacity


eMMC 8GB   supports 16/32 / 64GB

TF Card expansion (can be used to expand SSD)




Support RJ45 R / A 100M Ethernet,   support Ethernet.

Supports 2.4G / 5G Wi-Fi and Wi-Fi   802.11b / g / n protocols.

Support Bluetooth 4.2, sending   program by Bluetooth


Image rotation


Support manual rotation of 0 degrees, 90 degrees, 180   degrees, 270 degrees


Display interface


1 * LVDS interface (single / dual, 6-bit / 8-bit),   support 3.3V / 5V / 12V power supply

1 EDP interface, 1 HDMI1.4 interface, support 4K output

Support dual screen simultaneous display function, can   directly drive interface LCD screen with multiple resolutions

Onboard backlight control supports 12V backlight power   supply




Support standard left and right channel line output


Power amplifier


2 outputs (8 ohms, 10 watts dual audio amplifier   output)




Differential MIC input


Touch screen


Support USB multi-point infrared touch, multi-point   capacitive touch, multi-point nano film touch, multi-point acoustic wave

Touch, multi-point optical touch and more.




Built-in real-time clock function




1 USB-2.0 HOST, 1 USB-2.0 OTG, 4   extended USB ports (one of USB share with 4G module)




Infrared receiver, support infrared remote control   function




1 * Power status LED (green), 1 * System LED (green, blinking by   default)




1 * upgrade key


Serial port


2 UART port, 1 DEBUG port


IO port


5 IO input and output control, can   be used as key scanning control


Power Adapter


Input: AC100-240V.50-60HZ, Output: DC12V 1.5A

(Requires surge voltage less than 18V and ripple   voltage less than 100mV)



2. Software Parameters

Software Specifications


operating system


Android 7.1.2




MP3, WMA, WAV, APE, FLAC, AAC, OGG, M4A, 3GPP and other   formats




Support H.264, VP8, MAV, WMV, AVS, H.263, MPEG4 and   other video formats

1080P multi-video decoding




Support various image formats such as JPG, BMP, PNG


System comes with   application software


APK Installer, Email, Calculator, Browser, Recorder,   Calendar, Settings, Clock, Video Player, Search, Contacts, Gallery, Download,   Camera, Music, Explorer, etc.




support multi-language




Standard Android keyboard with optional third-party   input method


System Management


Original ecological Android system, open root   permissions, and can customize product development


Real-time remote monitoring, system crash   self-recovery, unattended 7 * 24 hours


Support OTA remote upgrade; support U disk upgrade


Support boot animation definition


Support server / stand-alone mode switching


Support Wi-Fi hotspot


System watchdog


Support software watchdog









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