DVI and HDMI are two different standards of digital video interfaces that share many things in common, but also have some important differences. For DVI LCD monitors, the effects include:

1. Signal transmission quality: HDMI supports higher bandwidth, it can transmit higher resolution and refresh rate, and more audio channels, so it is better in terms of signal transmission quality. DVI can only transmit video signals, while HDMI can transmit more multimedia signals.

2. Compatibility: HDMI has wider compatibility, it can be connected with different types of devices, such as high-definition TVs, game consoles, Blu-ray players, etc. DVI, on the other hand, can only be connected to computers and some high-definition TVs.

3. Cable type: HDMI uses HDMI cables when connecting devices, while DVI uses DVI cables. HDMI cables and DVI cables have different connectors, so they won't fit into each other's connectors. This means that a DVI LCD monitor needs to be connected with a DVI cable, and if it needs to be connected to an HDMI device, a converter or adapter is required.

4. Feature support: HDMI supports many advanced features, such as 3D, HDR, deep color, high dynamic range, etc., which can be transmitted through the HDMI interface. In contrast, the DVI interface does not have the support of these features and cannot transmit higher-level video signals.

Generally speaking, HDMI is an upgraded version of DVI, which provides better signal transmission quality and wider compatibility, and can realize higher-level video functions at the same time. For DVI LCD monitors, if you need to connect them to modern high-definition equipment, you may need to use a converter or adapter to achieve this.