LCD controller board is known as A/D board which is the major component in the multi-function LCD monitor. There is a LCD controller chip in the board to transfer the signals of input ports like RGB, DVI, HDMI, DP, and composite video port  to LVDS, TTL V-By-One, or eDP signals for various LCD panel modules. The LCD controller board also support OSD function for users to adjust brightness, contrast, color, and switch input ports.

The LED backlight driver board is designed to drive LED backlight module of LCD panel.

The major features of LCD controller board

Firmware version to support the resolution of LCD panel module

Jumpers to set up VDD

OSD functions to adjust brightness, contrast, color, sharpness, audio volume, and image position.

Input port control

Pin definition of LVDS or TTL output connector.

PWM signal to control audio volume and backlight brightness.




The LCD controller board is designed to drive LCD panel for building a LCD monitor. Before installing LCD controller board, we should check the following specs from LCD panel and setup jumpers on LCD controller board for suitable firmware, input signals, and power adapter.

The resolution of LCD panel (800×600, 1024×768, or 1920×1080, etc..)

The VDD of LCD module   (+3.3V ~ +12V)

The VDD of backlight module (+5V~ +24V)

Input signal interface of LCD panel  (TTL, LVDS, eDP, V-By-One)

Suitable signal cable for connection between LCD controller board and LCD panel module.

Suitable DC to DC power supply (+5V~+24V)

LVDS (low-voltage differential signaling) is a high-speed, long-distance digital interface for serial communication (sending one bit at time) over two copper wires (differential) that are placed at 180 degrees from each other. This configuration reduces noise emission by making the noise more findable and filterable. LVDS is often used in SerDes configurations.

LVDS outputs are capable of keeping up with the high data rates and keeping noise emission low, thus protecting the performance of the analog front end. Additionally, some manufacturers have reduced the number of wires necessary to transmit the signals from one point to another by serializing the output bits onto an LVDS pair, which further improves accuracy by avoiding skew-related errors that can occur when transmitting data in parallel.

LVDS has become the solution for many applications that demand low power consumption and high noise immunity for high data rates. Since its standardization under ANSI/TIA/EIA-644, LVDS has been implemented in a diverse set of applications and industries. The LVDS standard provides guidelines that define the electrical characteristics for the driver output and receiver input of an LVDS interface, but stop short of defining a specific communication protocol, required process technology, media, or voltage supply. The general, non-application-specific nature of the standard has been conducive to the adoption of LVDS across a wide variety of commercial and military applications. Moreover, growing demands for bandwidth have resulted in the emergence of high-performance technologies such as PCI Express and HyperTransport, which are based on high-speed LVDS connections. The low power and high noise immunity aspects of LVDS, along with the abundance of commercial off-the-shelf (COTS) LVDS components has led many military and aerospace applications to select LVDS as a robust, long-term solution for high-speed data transmission.

There are two types of LCD backlight module commonly integrated in the LCD module.

LED backlight module is most commonly integrated in small, inexpensive LCD panels. The white LED  backlight is becoming more common. An LED driver board is a required component to power on LED backlight module.

CCFL backlights are used display technology and most of them are integrated in large displays like computer monitors, and are usually white in color. An inverter is a required component to drive CCFL module.

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