The normal temperature of LCD screen is the specified storage temperature and working temperature range. The temperature can be too high or too low.

　　Then the high temperature will have a destructive effect on the LCD screen.

　　LCD screens are usually packaged in silicone. If the junction temperature exceeds the solid phase transition temperature (usually 125℃), the encapsulated material will become rubbery and accelerate the thermal expansion very quickly, resulting in the open circuit and failure of the LCD display screen.

　　When the working temperature of the LCD screen exceeds the maximum load temperature of the chip, the luminous rate drops rapidly, leading to light decay, which reflects the life of the LCD screen. That is to say, we usually say that the brightness of the LCD screen will become lower and lower when it is used for a long time.

　　The reason why temperature also affects the luminous rate of LCD display screen.

　　With the increase of temperature, the concentration of electrons and holes increases, the band gap width decreases and the electron mobility decreases. High temperature will cause the blue peak of the chip to move to the long-wave direction, so that the wavelength of the chip does not match the wavelength of the phosphor, thus reducing the efficiency of extracting external light from the LCD screen. With the increase of temperature, the quantum efficiency of phosphor decreases, the light output decreases, and the light output of LCD decreases, which eventually leads to the decrease of the brightness of LCD screen. The morphology of silica gel is greatly affected by temperature. With the increase of temperature, the internal heat of silica gel increases, and the refractive index of silica gelDecrease, resulting in a decrease in the light efficiency of the liquid crystal display.

       To sum up, reasonable and appropriate temperature is the key point of LCD display, and it can be used normally as long as users can operate according to the specifications. Now LCD screens of many sizes can reach ultra-wide temperature. Just choose a suitable temperature range.