An LCD TV is essentially a display device that requires a signal source to provide image signals to display a variety of images. LCD TVs and signal sources must be connected and transmitted through interfaces. Different signal sources have different interface types. Therefore, LCD TVs are usually equipped with multiple sets of different interfaces for users to choose from.
Common interfaces of LCD TVs include AV compound video interfaces, S-terminal interfaces, chromatic aberration interfaces, VGA interfaces, DVI interfaces, HDMI interfaces, and cable TV interfaces. Next, let's take a look at the common interfaces.
AV composite video interface is currently the most widely used interface in audio/video products. It is a analog interface, this interface consists of yellow, white, and Red 3-channel RCA connectors. The yellow connectors transmit video signals, the white connectors transmit left-channel audio signals, and the red connectors transmit right-channel audio signals.
S-Terminal interface s terminal, that is, separated video terminal S-video (separatevideo), which is actually a five-core interface, consists of Video Brightness Signal y, video color signal C, and a public mask ground. Only videos can be input and output.
The Component Interface uses the ypbpr and YCbCr identification methods. Generally, three signal lines are used to transmit the bright and two-way chromatic aberration signals. The three sets of signals are: the brightness marked with Y, and the color difference signals removed from the three primary colors-blue and red-are marked with Pb and PR, respectively, or CB and Cr, do not use green, blue, or red to separate the three wires. The chromatic aberration interface is a analog interface that does not transmit audio signals.
Cable TV Interface
VGA Interface
VGA (videographicarray) interface is a video graphics array, also known as the D-sub interface. It is a 15-pin trapezoid plug, divided into three rows, five in each row, transmitting analog signals. The VGA interface uses an asymmetric 15-pin connection to transmit only video signals.
DVI-I interface DVI-I plug-in is compatible with numbers and analog connectors, so, the DVI-I plug-in has 24 Digital Plug-In + 5 analog plug-in Jack (that is next to the four pinholes and a cross flower ).
DVI-D interface DVI-D plug-in is a pure digital interface, so the DVI-D plug-in only 24 Digital Plug-in Jack (without the simulation of the four pinholes and a cross flower ). The HDMI interface is a new generation of Multimedia Interface Standard. Its full name is high-definitionmultimediainterface. The Chinese meaning is High-Definition Multimedia interface. It is a 19-pin digital interface that can transmit both video and audio signals.
Scart (Syndicat des constructeursd 'appareils radior é cepteurs et t é l é viseurs) Interface
It is a special audio/video interface, which is an industrial standard for the interconnection of audio and video equipment developed by French company peritel, it is also the interconnection interface required by Europe for Satellite TV receivers, televisions, video recorders and other audio and video devices. The standard scart interface is a 21-pin connector with a right-angle trapezoid shape, commonly known as the "Broom head ". The 21-pin defines audio and video signals, which can be used to transmit CVBS, RGB signals, and other video signals, as well as stereo audio frequency signals. The 21-Pin transmission signals can be divided into video signals, audio signals, control signals, ground wires, and data lines. In addition, the scart interface implements bidirectional transmission to implement the so-called "loop" loop function.