At present, there are four main display modes of monitors in the medical industry:
1. Digital tube (LED display): can only display digital results, can not display waveform information, simple function, has been used in the early single-parameter monitor.
2. CRT display: this is a very common display. Its advantages are high resolution and low price, but its disadvantages are large volume, not easy to miniaturize the whole machine, high pressure radiation and easy heating.
3. LCD screen: liquid crystal display screen. Its advantages are small size, low power consumption, no radiation and no heating. in the mid-1990s, the advent of color TFT technology overcame the shortcomings of low brightness and small viewing angle of monochromatic LCD, and because the color display was pleasing to the eye and intuitive, it was soon widely used. At present, the mainstream monitors at home and abroad use LCD display screen.
4. EL display screen: before the emergence of the TFT display, the EL display screen was once used in a high-end monitor. It not only has the advantages of LCD, but also has the advantages of high brightness and large viewing angle, but its disadvantage is that the cost is high. Therefore, with the development of TFT display screen, the application of EL display screen in the monitoring field is gradually replaced by TFT display screen.