Show screen picture first big and then small

Users in the use of the computer, found that just turned on the computer, the display screen is very large, and then slowly in a few seconds to reduce to normal conditions.

This happens to be normal, which represents the good quality of the display. This phenomenon is due to the beginning of the power tube, the deflection yoke beam intensity is larger, in order to avoid the intensity of the electron beam on the boot of a silver screen in a moment of bombardment, some good quality display design protection circuit method, let the intensity of the electron beam slowly dispersed. When the beam strength of the deflection yoke is restored to normal, the protection circuit is closed. The user sees the picture first big after small, is protects the circuit adjustment the process.