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What is TFT LCD LVDS interface?

LVDS interface is also a common communication interface in TFT LCD interface. Its English name is lowvoltagedifferential signaling, which is a low-voltage differential signal technology interface. It is a digital video signal transmission mode developed by NS company (National Semiconductor Company) to overcome the disadvantages of high power consumption and large EMI electromagnetic interference when transmitting broadband high bit rate data at TTL level.


The LVDS output interface in the LCD interface uses a very low voltage swing (about 350mV) to transmit data through differential on two PCBs or a pair of balanced cables, that is, low-voltage differential signal transmission. Using LVDS output interface, the signal can be transmitted at the rate of hundreds of Mbit / s on differential PCB line or balance cable. Due to the low-voltage and low current driving mode, low noise and low power consumption are realized. At present, LVDS output interface has been widely used in 17in and above LCD.

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TFT LCD


TFT LCD interface LVDS output interface is also divided into the following four types:


(1) Single channel 6-bit LVDS output interface


In this interface circuit, single channel transmission is adopted, and each primary color signal adopts 6-bit data, a total of 18 Bit RGB data. Therefore, it is also called 18 bit or 18bitlvds interface. This is also known as the 18 bit or 18bitlvds interface.


(2) Dual 6-bit LVDS output interface


In this interface circuit, two-way transmission is adopted, and each primary color signal adopts 6-bit data, in which the odd data is 18 bits and the even data is 18 bits, a total of 36 bit RGB data. Therefore, it is also called 36 bit or 36bitlvds interface.


(3) Single channel 8-bit 1tl output interface


In this interface circuit, single channel transmission is adopted, and each primary color signal adopts 8-bit data, a total of 24 bit RGB data. Therefore, it is also called 24 bit or 24bitlvds interface.


(4) Dual 8-bit 1tl output bit interface


In this interface circuit, two-way transmission is adopted, and each primary color signal adopts 8-bit data, in which the odd data is 24 bits and the even data is 24 bits, a total of 48 bit RGB data. Therefore, it is also called 48 bit or 48bitlvds interface.


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