These aspects of LCD TVs

D-sub15pin
D-sub VGA card is generally the most common computer port, the port uses the asymmetric distribution 15pin connection, which works within the memory image stored in digital format in the RAMDAC after the analog signal into an analog frequency modulation signal and then and then output to a digital display device imaging, so VGA signal at the input (digital display equipment), you do not like the other video signal decoding circuit that go through a conversion matrix. From the foregoing principle known VGA video imaging video transfer process is simple, so the VGA port, has many advantages, such as no separation circuit synthesis crosstalk no wear and tear.
VGA video signal transmission signal to the main computer, VGA port contains an I2C bus, so the host and display devices can be negotiated and automatically determine the best display format, and "plug and play", but the use of hybrid video signal, so after a lot of separate derivative 3RCA or DVI port as such. Many LCD projectors also support the component video adapter to D-sub15pin this video inputs.

-Video
SeparateVideo was also known SUPERVIDEO, but the correct law SeparateVideo which is called discrete video terminal input, it will be called SUPERVIDEO S-Video, with the S-VHS VCR and developed. S-Video is a five-pin S-video port terminals, by the video luminance signal (Y) and chrominance video signal (C) and all the way to the public mask ground components. It separated luminance and chrominance output composite video signal output to avoid the interference between the luminance and chrominance.TFT Lcd Modules
1RCA because it no longer compared to Y / C hybrid transmission and, therefore, no longer need to be bright separation and decoding, and the use of separate transmission channel video equipment largely avoided the signal crosstalk generated image distortion , which greatly improves the clarity of the image, but the S-Video still the two color difference signals (CrCb) mixing all the way chrominance signal C, and then be transmitted within the display apparatus for decoding the Cb and Cr treatment, so much will bring some signal loss and distortion, but quite subtle. S-Video video resolution is higher than 1RCA terminals. S terminal transmitted video signal fidelity higher than the V terminal with S terminal is connected to the video device, its resolution up to 400-500 bar, affecting quality and 3RCA (Component YPbPr) is roughly equal, the transmission distance up to 3-5M.lcd module

1RCA (commonly known as the standard video input terminals / AV terminal)
V terminal is Video (video) terminal short, it is the sound / draw separate video terminal, although the transmission of the video signal and the audio signal through other terminals. The most common is called AV terminal port group, which is composed of three separate RCA plugs (also known as RCA terminal) composition, in which the V port to connect composite video signal, the yellow jack; L port to connect the left channel sound signal is white jack; R port to connect right-channel audio signals to red jack. This mixed video signal without the RF signal that modulation, amplification, detection, demodulation process, signal fidelity is relatively moderate, the use of wire great impact on image quality, resolution, generally up to 350-450 pieces, but because an analog port numbers used in flat panel display devices, and more analog to digital process will lose a lot of S / N ratio, it is generally relatively flat display device numbers is not recommended.