For the first setting, you need to turn off the automatic brightness adjustment switch, then go to an absolutely dark place, cover the light sensor with your finger (cover the screen light), and then turn the brightness slider to the darkest. At this time, open the automatic brightness adjustment switch, lock the screen, unlock, and the function will return to normal.
When the iphone is placed under the lamp, the brightness slider automatically moves to the right to lighten up, which is a calibration method that darkens the screen and is not sensitive to bright environments. If the phone is placed under the lamp when setting, the slider is adjusted to the brightest, and then the automatic brightness adjustment switch is turned on, then the bright environment becomes very sensitive, and the screen will quickly darken.
tips
After iOS6 optimizes the system, the automatic brightness adjustment needs to be calibrated by itself.
There are two possible causes of automatic brightness adjustment failure, one is to paste the front film, blocking the sensor; The second is the jailbreak, there are plug-in conflicts.