Backlight module, display apparatus, anti-peep display apparatus and driving method therefor

A backlight module, comprising:

• a light guide plate having a bottom surface and a light exit surface that are disposed oppositely, and a light incident surface connecting the bottom surface and the light exit surface;
• a substrate located on a side of the bottom surface away from the light exit surface;
• a plurality of first light-emitting devices located on a side of the substrate proximate to the bottom surface;
• the substrate being configured to control operating states of the plurality of first light-emitting devices;
• a plurality of second light-emitting devices disposed opposite to the light incident surface;
• and
• a prism sheet located on a side of the light guide plate away from the substrate;
• wherein
• the plurality of first light-emitting devices are configured to emit first light, so that the first light passes through the light guide plate and the prism sheet to become light of a first viewing angle;
• and
• the prism sheet is configured to cooperate with the light guide plate to modulate second light emitted by the plurality of second light-emitting devices into light of a second viewing angle, and the first viewing angle is larger than the second viewing angle;
• and
• the substrate includes a plurality of driving circuits;
• and a driving circuit is electrically connected to at least one first light-emitting device;
• the substrate further includes a plurality of scan signal lines, a plurality of data signal lines and a plurality of second voltage lines;
• the driving circuit includes a first transistor, a second transistor and a storage capacitor;
• wherein a control electrode of the first transistor is electrically connected to a scan signal line, a first electrode of the first transistor is electrically connected to a data signal line, and a second electrode of the first transistor is electrically connected to a first electrode of the storage capacitor;
• a control electrode of the second transistor is electrically connected to the first electrode of the storage capacitor, a first electrode of the second transistor is electrically connected to a first electrode of a first light-emitting device, and a second electrode of the second transistor is grounded;
• a second electrode of the first light-emitting device is electrically connected to a second voltage line;
• and a second electrode of the storage capacitor is grounded.