Curved screens have many advantages:

(1) The material is not easy to damage, and the elasticity is stronger than that of ordinary mobile phones; The shape looks personal, as for practicality, given the trend of phone sizes getting larger and larger, curved screens may be more convenient to operate.

(2) Curved screens are easier for the human eye to see. Experts say the screen is indeed more in line with the arc of the human retina and can improve the sensory experience. This is perhaps felt more directly on a curved TV screen.

(3) Curved screen thickness is low, light weight and low power consumption. This is related to the AMOLED - active matrix organic light-emitting diode technology used in flexible screens. This diode saves power, consumes less energy, and supports curved displays. This is good for smartphones to continue to become lighter, thinner and longer-lasting.

With the introduction of curved screen mobile phone, how to measure curved glass arc, flatness, thickness and three-dimensional contour has become a new technical problem in the industry. The spectral confocal displacement sensor is used to measure the curved glass screen, and good results are achieved.