D-SubVGA connector
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D-Sub connector, also known as D-subminiature connector, is a common electronic connector named after its unique D-shaped metal casing. D-Sub connectors are widely used in computers and communication devices, especially in the external interfaces of early computers, including serial ports (RS-232), parallel ports, keyboard and mouse interfaces, etc. Among them, the VGA (Video Graphics Array) connector is a variant of the D-Sub connector, specifically used for simulating the transmission of video signals.
The characteristics of VGA connectors:
Analog Video Interface: VGA connectors are used to transmit analog video signals, supporting multiple resolutions and refresh rates. They were the standard interface for early displays and graphics cards.
D-Sub appearance: The VGA connector adopts the "D" - shaped metal shell design of the D-Sub connector, which helps to align the connector correctly during insertion and prevent accidental insertion.
Pin layout: The standard VGA connector has 15 pinholes arranged in three rows, with 5 in each row. These pins are used to transmit red, green, and blue primary color signals, as well as horizontal synchronization, vertical synchronization, and other necessary control signals.
Reliability: The design of D-Sub connectors provides high mechanical strength and electrical reliability, making them suitable for long-term use.
Structural composition:
The basic structure of VGA connectors includes:
Metal shell: Provides shielding and physical protection to ensure that the connector is securely inserted into the corresponding socket.
Pin: Used for transmitting video and control signals, usually made of copper alloy, with good conductivity and corrosion resistance.
Insulator: usually made of high-temperature resistant plastic material, used to isolate and protect pins.
usage method:
Connect the monitor: Insert one end of the VGA connector into the computer's graphics card output port and the other end into the monitor's VGA input port.
Tightening screws: Many VGA connectors are designed with screws for tightening after connection to ensure stability.
Adjusting Resolution: Set the appropriate resolution and refresh rate in the computer operating system to match the best display effect of the monitor.
Application:
Although VGA connectors have gradually been replaced by digital interfaces such as HDMI and DisplayPort, they are still used in some older monitors, projectors, and older models of computers. In addition, VGA connectors are also commonly used in some professional fields, such as medical imaging and industrial monitoring systems, as these fields may require compatibility of analog signals.
With the development of technology, more and more devices are turning to using digital interfaces, but VGA connectors, as a classic type of interface, still occupy a place in specific application scenarios.