20x4 1U Character LCD Display HMI with Serial RS232, TTL,USB, I2C with a 7 key backlit Tactile Keypad and 3 LED's, 12V, 24V power and RGB Backlight

The LK204-7T is a 5.25” PC Bay Insert 1U with a 20x4 Intelligent LCD display designed to fit into 1U form factors. Engineered to quickly and easily add an elegant graphic HMI to any application. Multiple communication protocols such as Serial RS232, TTL, I2C, and USB communication models allow the LK204-7T Graphic LCD to be connected to a wide variety of host controllers.

Our Character LCD provides you with a cost-effective industrial HMI user interface solution for that great product/project you are developing. This LCD displays features optional on-board large and medium digits all with the convenience of a 7 key backlit tactile keypad will allow fast development for any application.

  • 20x4 1U Character LCD Display HMI
  • Available Interfaces: Serial RS232, TTL, I2C, and USB
  • Two available voltage options: 5V, and 3.3V low voltage
  • 7 key backlit tactile keypad
  • 3 dual colour indication status LEDs
  • Software controlled contrast and brightness with configurable time-out setting up to 90 minutes
  • Built in Horizontal or Vertical bar graphs
  • Extended temperature available for extreme environments of -20C to 70C
  • Fast and easy development
  • Custom headers and Semi-custom designs
  • Designed, supported and Made in CANADA
  • Long life cycle
  • Backed by Matrix Orbital's decades of research and development
Family/SeriesIntelligent Display
Module Width (mm)142
Module Height (mm)38
Display TypeCharacter LCD
Backlight TypeLED
Viewing Area Width (mm)82
Viewing Area Height (mm)36
Active Area Width (mm)77
Active Area Height (mm)23.6
Resolution Width (Pixels)100
Resolution Height (Pixels)32
Pixel Pitch Width (mm)0.65
Pixel Pitch Height (mm)0.65
Pixel Width (mm)0.6
Pixel Height (mm)0.6
Character Columns20
Character Rows4
Character Pitch Width (mm)3.9
Character Pitch Height (mm)6.15
Character Width (mm)3.2
Character Height (mm)5.15
Viewing DirectionTop
Viewing Angle60
Haptic FeedbackNone
Audio FeedbackNone
Advanced GPO'sNone
DOWOptional, 1
Integrated LED's3
InterfaceRS232, TTL, I2C, USB
Command ProtocolMatrix Orbital
Negative VoltageIntegrated
Backlight DriverIntegrated
Minimum Voltage (Vdc)3.3
Typical Voltage (Vdc)3.3, 5
Maximum Voltage (Vdc)5
Min. Operating Temp. (°C)0, -20
Max. Operating Temp. (°C)50, 70
Min. Storage Temp. (°C)-30, -10
Max. Storage Temp. (°C)60, 80


 File NameRevisionSize 
 File NameRevisionSize 
LK204-7T-1U  3D Drawing for LK204-7T-1U Revision


Solidworks .step style 3D Drawing for LK204-7T-1U PCB Revision 3.0.

LK204-7T-1U  Manual for LK204-7T PCB Revision


Manual for PCB Revision 1.0

LK204-7T-1U  AutoCAD Drawing for PCB revision 1.01.0349.34KiB


AutoCAD Drawing for PCB Revision 1.0

LK204-7T-1U  PCN 2016-01-21-01223.77KiB


Firmware v6.3 Release

LK204-7T-1U  PCN 2011-10-11-0195.5KiB


Display Modules I2C Update


 File NameRevisionSize 
 File NameRevisionSize 
Alphanumeric Software  DisplayTunerPro v1.0.0.0 Software1.0.0.0802.25KiB


Display Tuner Pro (MOCD#) is an update to our popular uProject testing software for Matrix Orbital displays.  It adds support for new features and displays, including legacy and graphic units, to our established base of features and scripting.  This tool supports all Matrix Orbital Intelligent and Economy Series displays, including the following:

  • GLK Series (GLK12232-25-SM, GLK12232-25, GLK19264-7T-1U, GLK24064-25, GLK24064R-25-1U, GLK240128-25)
  • GLT Series (GLT12232-SM, GLT24064R-1U, GLT24064, GLT240128)
  • GOK Series (GOK12232A-25-SM, GOK12832-25-SM)
  • LCD/OLED/VFD Series (LCD0821, LCD2041, OLED0821, OLED2041, VFD2041)
  • LK Series (LK162-12, LK162A-4T, LK162B-7T, LK202-25, LK204-25, LK204-7T-1U, LK402-25, LK404-25)
  • MOI/MOS/MOU Series (MOS, MOU, XBoard-S, XBoard-U)
  • OK Series (OK162-12, OK202-25, OK204-25)
  • VK Series (VK162-12, VK202-25, VK204-25, VK246-25)
  • And all Legacy Displays

Alphanumeric Software  uProject1.42MiB


uProject is an advanced testing software for Matrix Orbital displays. It allows testing of nearly all the features and allows test scripting and many other advanced features.

uProject (micro Project) is a series of different tools that should allow the testing of nearly all the features of most of our displays. uProject also features

scripting abilities to speed up testing or changing of a specific feature, such as backlight brightness or contrast.


All LK/VK/PK, MOS, MX and LCD/VFD series.

Alphanumeric Software  Display Tuner407KiB


This basic application allows you to test and set LCD Contrast, Brightness, VFD Brightness, set baudrate and send text to the display.

Compatible Displays:

All LK/VK/PK, MOS, MX and LCD/VFD series.

Alphanumeric Software  Custom Character Tool451.61KiB


This simple program to give you hex values for custom characters.

This program allows you to see the hex values per lines for custom characters making implication easier. Simply download the program, uncompress and run. You will require Microsoft .NET Framework Version 1.1, it can be downloaded from here.

This application was written by Ray of LCD Studio. (

For technical discussions and questions, please visit our forums

Alphanumeric Software  Boot Logo40.03KiB


Boot Logo is designed for modification of the startup screen for some alphanumeric displays with startup screens.

The user has the ability to use the normal text from the display\'s font table, and the 8 custom characters.

Compatible Displays:



All MX series

This application was written by Ray of LCD Studio. (

Alphanumeric Software  Boot Edit524.62KiB


Boot Edit is designed for modification of advanced features of the LK/VK/PK USB and MX series. This is a more advanced version of the Boot Logo software.

Boot Edit allows the setting of these features:

  • Custom startup screen using custom characters
  • Power on GPO and FAN settings, such as speed, and frequency
  • LCD Contrast, backlight brightness and VFD brightness

Compatible Displays:

  • LK/VK/PK202-25
  • LK/VK/PK202-24-USB
  • LK/VK204-24-USB
  • MOS-AL/AV/AP202
  • MOS-AL/AV204
  • All MX series

Only the MX and USB series support the Edit GPO Defaults section.

This application was written by Ray of LCD Studio. (

Application Notes

 File NameRevisionSize 
 File NameRevisionSize 
Application Notes  eGTT50-TPR Drawing (Rev 1.0).pdf327.29KiB


TPN: non touch, TPR: resistive touch, TPC: capacitive touch

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  • PCB Rev: 1
  • Model: LK204-7T-1U
  • Availability: In Stock (Build to Order)
  • $65.60USD
  • 25 or more $63.58USD
  • 50 or more $58.57USD
  • 100 or more $53.37USD
  • 200 or more $49.86USD
  • 500+ : Contact us

Tags: LK204-7T-1U, LK204-7T-1U-TCI, LK204-7T-1U, LK204-7T-1U-WB, LK204-7T-1U-FGW, CFA635, CFA735