The interface Type of POS Monitor
The interface type of the liquid crystal display determines the quality of image transmission. The Common types of interfaces include VGA, DVI, and HDMI. Features are high speed and high quality.
15-pin D-Sub also called VGA interface, CRT color display can only accept analog signal input, because of design and manufacturing reasons,the most basic contains R \ G \ B \ H \ V (respectively red, green, blue, line , Field) 5 components, no matter what type of interface access, the signal contains these 5 components at least. The most common interface for most PC graphics cards is D-15, which is a D-shaped three-row 15-pin jack. Some of them are useless, and the signal lines used for connection are also vacant, but there are complete contacts.
DVI, the current DVI interface is divided into two, one is a DVI-D interface, can only receive digital signals, the interface is only 3 rows and 8 columns with a total of 24 pins, of which a pin in the upper right corner is empty. Not compatible with analog signals.
The other type is a DVI-I interface that is compatible with both analog and digital signals. Compatible with analog signals does not mean that the analog signal interface D-Sub interface can be connected to the DVI-I interface, but must use an adapter to use, usually the graphics card with this interface will have the relevant adapter.
HDMI, English full name is "High Definition Multimedia", Chinese means high-definition multimedia interface. The HDMI interface can provide up to 5Gbps of data transmission bandwidth, allowing the transmission of uncompressed audio signals and high-resolution video signals.