Display panel having switchable wide and narrow viewing angles and driving method, and display device

A driving method for a display panel with switchable wide and narrow viewing angles, wherein the display panel has a first graphic region and a second graphic region, and the display panel comprises a light adjusting box and a display box which are stacked with one on another;

• the light adjusting box comprises a first substrate, a second substrate opposite to the first substrate, and a first liquid crystal layer between the first substrate and the second substrate, the first substrate is provided with a common viewing angle electrode on the side facing the first liquid crystal layer, the second substrate is provided with a first viewing angle electrode and a second viewing angle electrode which are cooperated with the common viewing angle electrode on the side facing the first liquid crystal layer, the first viewing angle electrode and the second viewing angle electrode are insulated and separated from each other, the first viewing angle electrode corresponds to the first graphic region, the second viewing angle electrode corresponds to the second graphic region;
• the driving method comprises:
• in the wide viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, and a second electrical signal is applied to both the first viewing angle electrode and the second viewing angle electrode, the voltage difference between the second electrical signal and the first electrical signal is less than a first preset value or greater than a second preset value, the transmittance of the first graphic region and the second graphic region is the same from the same side viewing angle;
• in the narrow viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, a third electrical signal is applied to the first viewing angle electrode, and a fourth electrical signal is applied to the second viewing angle electrode, the voltage difference between the third electrical signal and the first electrical signal, as well as the voltage difference between the fourth electrical signal and the first electrical signal, are both greater than a third preset value and less than a fourth preset value, wherein the amplitude of the third electrical signal is different from the amplitude of the fourth electrical signal for at least part of the time within one period, and the amplitude of the third electrical signal periodically changes, such that the transmittance of the first graphic region from the same side viewing angle periodically changes;
• wherein the first preset value is less than or equal to the third preset value, and the second preset value is greater than the fourth preset value.