The LVDS interface is also a common communication interface in LCD display screens. Its English name is LowVoltageDifferentialSignaling, which is a low-voltage differential signal technology interface. It is a digital video signal transmission method developed by NS Corporation (National Semiconductor Corporation of the United States) to overcome the drawbacks of high power consumption and EMI electromagnetic interference when transmitting broadband high bit rate data using TTL level.
The LVDS output interface in the LCD display screen utilizes a very low voltage swing (about 350mV) to transmit data through differential transmission on two PCBs or a pair of balanced cables, that is, low-voltage differential signal transmission. By using LVDS output interface, signals can be transmitted at a rate of several hundred Mbit/s on differential PCB lines or balanced cables. Due to the use of low-voltage and low current driving methods, low noise and low power consumption are achieved. At present, the LVDS output interface has been widely used in LCD displays of 17 inches and above.
The LCD screen interface LVDS output interface is also divided into the following four types:
(l) Single channel 6-bit LVDS output interface
In this interface circuit, single channel transmission is used, and each primary color signal uses 6 bits of data, totaling 18 bits of RGB data. Therefore, it is also known as an 18 bit or 18 bit LVDS interface. This, also known as an 18 bit or 18 bit LVDS interface.
(2) Dual 6-bit LVDS output interface
In this interface circuit, dual channel transmission is used, and each primary color signal uses 6 bits of data, including 18 bits for odd channel data and 18 bits for even channel data, totaling 36 bits of RGB data. Therefore, it is also known as a 36 bit or 36bit LVDS interface.
(3) Single 8-bit 1TL output interface
In this interface circuit, single channel transmission is used, and each primary color signal uses 8-bit data, totaling 24 bit RGB data. Therefore, it is also known as a 24 bit or 24 bit LVDS interface.
(4) Dual 8-bit 1TL output bit interface
In this interface circuit, dual channel transmission is used, and each primary color signal uses 8-bit data, including 24 bits for odd channel data and 24 bits for even channel data, totaling 48 bits of RGB data. Therefore, it is also known as a 48 bit or 48bit LVDS interface.
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