Increasing the driving voltage of the liquid crystal display

When the temperature drops, the threshold voltage of the lcd modules will rise, increasing the driving voltage of liquid crystal displays, liquid crystal display can be achieved at low temperatures, which we call Low Temperature Display. The main components of this approach is a temperature sensor with an adjustable output voltage, changing the drive voltage of the liquid crystal display according to the temperature of the external environment in order to achieve the display of the display at low temperatures, this method can make the liquid crystal display operating temperature range is -20 ℃ ~ + 50 ℃. However, the drive voltage can not raise unlimited ended, when the drive voltage is increased to a certain extent, the contrast of the display will be significantly decreased, and even black and cause the monitor to use.