Such as syringe pump, ECG monitor, fetal heart rate monitor, ventilator, etc. the size of LCD screen is 7.0 inches to 12.1 inches. The screen is required to have ultra wide viewing angle and long life. Sphygmomanometer, blood glucose meter, thermometer, etc. the size of LCD screen is 2.8 to 5.0 inches. The screen is required to be impact resistant and have a wide viewing angle.