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What Are The Video Connector Types? How To Choose Video Connectors

What Are The Video Connector Types? How To Choose Video Connectors

October 18 , 2023 0

In today's interconnected world, video connectors play a crucial role in transmitting visual data between various electronic devices. From desktop computers to gaming consoles, from televisions to projectors, video connectors enable us to experience high-quality audiovisual content. This essay aims to provide an overview of the different types of video connectors, their features, and their applications.

I.Several Common Types Of Video Connectors

VGA (Video Graphics Array):
The Video Graphics Array (VGA) connector was widely used in the past for analog video transmission. It features a 15-pin connector, typically blue in color, and transmits standard-definition (SD) video signals. Although VGA connectors have become less prevalent in recent years, they can still be found on older computers and displays.
DVI (Digital Visual Interface):
The Digital Visual Interface (DVI) connector is a versatile interface that can transmit both analog and digital video signals. It offers various configurations, including DVI-D (digital-only), DVI-A (analog-only), and DVI-I (integrated analog and digital). DVI connectors are commonly used for connecting monitors, projectors, and graphics cards, providing high-quality video output.
HDMI (High-Definition Multimedia Interface):
The High-Definition Multimedia Interface (HDMI) has become the standard for connecting audiovisual devices. HDMI connectors are capable of transmitting high-definition (HD) video and audio signals, making them ideal for modern home theater systems, gaming consoles, Blu-ray players, and televisions. HDMI supports various resolutions, including 4K and even 8K, and offers additional features like Ethernet connectivity and Audio Return Channel (ARC).
DisplayPort:
DisplayPort is a digital video and audio interface designed to deliver high-resolution visuals. It offers superior bandwidth and flexibility, making it suitable for demanding applications such as gaming, professional graphics, and multi-monitor setups. DisplayPort connectors are commonly found on computer monitors, laptops, and graphics cards, providing a seamless experience for both video and audio transmission.
Thunderbolt:
Initially developed by Intel in collaboration with Apple, Thunderbolt is a high-speed interface that combines DisplayPort and PCIe technologies. Thunderbolt connectors provide lightning-fast data transfer rates and support multiple protocols, including video output. They are commonly found on Apple devices, offering the ability to connect external displays, storage devices, and other peripherals through a single port.
USB-C (USB Type-C):
USB-C, or USB Type-C, is a versatile connector that has gained widespread adoption due to its small size and high functionality. While primarily known for its ability to charge devices and transfer data, USB-C also supports video output. With the use of appropriate adapters or cables, USB-C can transmit video signals using DisplayPort or HDMI protocols, making it compatible with a wide range of devices, including laptops, tablets, smartphones, and monitors.

II.Video Connector Development

Previously, only an analog VGA interface was utilized to connect a rugged LCD monitor to the computer. With the development of new technologies for flat-panel monitors, the capabilities of the VGA connector have become insufficient. To attain the highest image quality, you need to use a digital standard, such as DVI. Manufacturers of devices for home entertainment have created the HDMI standard, which became the digital successor of the analog scan connector. Somewhat later, VESA (Video Electronics Standards Association) designed DisplayPort. As mentioned earlier, modern devices are equipped with various monitor ports: HDMI, DVI, VGA, DisplayPort (DP), USB-C, Thunderbolt, SDI. Let’s consider each of the interfaces.

III.How To Categorize The Wide Variety Of Video Connectors

For any molded product, connectors are essential, such as USB, headphone jacks, Ethernet ports that we commonly use, or customized interfaces that we don't see too often for the military. Therefore, based on a wide range of markets, connector classification is also diverse.

1、According to the function of internal and external connection of electronic equipment, the level of interconnection is divided into 6 kinds:

A: Component to package interconnection;

B: package to board interconnection;

C: board-to-board interconnection;

D: component-to-component interconnection;

E: component-to-input-output interface interconnections;

F: system-to-system interconnection.

2、Classified according to the type of transmission signal:

A: power connector (transmit power);

B: Signal connectors (transmit signals);

C: high-frequency connectors (transmission of data).

3、Classified according to electrical requirements:

A: general-purpose connectors;

B: high power connectors;

C: high voltage connectors;

D: pulse connector;

E: low noise connectors;

F: phase modulation connectors;

G: precision coaxial connectors.

4, according to the working frequency classification:

High-frequency connectors, high-frequency coaxial connectors, video connectors, coaxial converters, impedance converters, match-size converters, gender converters, microstrip-coaxial converters, waveguide-coaxial converters, matched-load connectors, low-frequency connectors, printed board connectors, ribbon cable connectors, integrated circuit connectors, hybrid connectors, and so on.

5、Classified according to environmental conditions (the above figure is waterproof connector):

A: sealed connectors;

B: high water pressure sealed connectors;

C: high vacuum sealed connectors;

D: three-proof connector;

E: irradiation resistant connectors;

F: high temperature connectors;

G: low temperature connectors.

6, according to the shape classification:

Circular connectors, mostly used in military equipment; (connection forms are mainly bayonet (fast), threaded, auto-locking, push-pull, straight in and out, etc.) Rectangular connectors, wide range of uses, rapid development, a lot of board-level connectors belong to the rectangular connector. (Plugs and sockets are generally connected in the form of direct insertion and pull-out and thread locking.)

Circular connectors

Rectangular connector

7、Classified according to the direction of application:

A: RF connectors;

B: fiber optic connectors;

C: non-contact connectors (such as proximity switches, etc.)

The above classification is in accordance with the external or application attributes to classification, specific to each manufacturer will begin to be different, although the NEDA has developed a connector component package classification level standards, but with the progress of science and technology, the connector classification is beginning to be complex. However, in terms of communication connectors, because of the software protocol with, indeed, less change and can be effectively differentiated.

A, multi-wire cable connectors, including DB connectors and DIX connectors and DIN connectors.

B, twisted-pair cable connectors, including RJ45 and RJ11 connectors;

C, coaxial cable connectors, including T connectors and BNC connectors and termination resistors.

IV.Conclusion

Video connectors have evolved significantly over the years, transitioning from analog to digital interfaces to meet the demands of high-definition and high-performance video transmission. VGA and DVI connectors, while still in use, have given way to HDMI, DisplayPort, Thunderbolt, and USB-C, which offer improved video quality, higher resolutions, and more versatile connectivity options. Understanding the different types of video connectors empowers users to connect their devices seamlessly, unlocking a world of immersive audiovisual experiences.