Common interface of notebook computer

HDMI
The English full name is "High Definition multimedia", the Chinese meaning is the HD multimedia interface. is a dedicated digital interface for image transmission, which transmits audio and video signals at the same time, with a maximum data transfer speed of 5Gbps. HDMI not only satisfies 1080P resolution, but also supports digital audio formats such as DVD audio, and supports eight-channel 96kHz or stereo 192kHz digital audio transmission. Support EDID, DDC2B, so the device with HDMI has "Plug and Play" features, the signal source and display devices will automatically "negotiate", automatically select the most appropriate video/audio format. The volume is small, HDMI can transmit 15 meters farthest.
VGA interface
This interface is the most important interface on a computer monitor. The VGA interface is the type of interface currently available for laptops, but this needs to be achieved with a VGA interface on the display device, and mostly used to connect monitors and projectors. From the appearance, the VGA interface is a D-type interface, a total of 15 needles empty, divided into three rows, each row five.   Among them, in addition to 2 with the NC (not Connect) signal, 3 display data bus and 5 GND signal, the more important is 3 RGB color component signal and 2 scan synchronous signal HSync and VSync pin. USB interface
The USB interface color on some models does not have any special treatment, and looks no different from USB2.0, it is black logo. But its logo is often engraved with the words "SS" to comment. "SS" is the abbreviation of "SuperSpeed USB", that is the meaning of USB 3.0 interface, the black USB interface with this identity is also USB3.0. In addition, the metal pin from the USB interface can also be quickly differentiated, generally USB 2.0 uses a total of 4 pin design, and USB 3.0 is a two-row pin design, 5 pins in front, 4 pins in the back, plus a total of 9 pins.
There is a lightning bolt next to the USB interface identification, indicating that the interface supports shutdown charging, that is, when the laptop shuts down, you can also use the power of the laptop to charge the mobile device around, this feature is quite practical.