Patent ID: 11953718
Assignee: HKC CORPORATION LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. A display apparatus comprising:
a display panel;
a display film assembly disposed on a light-incident side of the display panel and comprising:
a first light guide plate; and
an optical film disposed on one side of the first light guide plate facing the display panel;

a privacy film assembly comprising:
a second light guide plate; and
a privacy film disposed between the first light guide plate and the second light guide plate and configured to adjust divergent lights exiting the second light guide plate into privacy lights at a preset angle;

a light source configured to emit incident lights to be selectively irradiated to the first light guide plate or the second light guide plate, so that the display apparatus is able to switch between a normal display mode and a privacy display mode, wherein in the normal display mode, the incident lights are irradiated to the first light guide plate, and divergent lights exiting the first light guide plate are transmitted to the display panel through the optical film, and in the privacy display mode, the incident lights are irradiated to the second light guide plate and then incident on the privacy film, and transmitted to the display panel through the first light guide plate and the optical film in sequence, wherein
the display apparatus further comprises a back plate, the light source is movably disposed on the back plate, so that the incident lights emitted by the light source can be selectively irradiated to the first light guide plate or the second light guide plate, wherein
the light source comprises a movable bracket movably disposed on the back plate and a light-bar unit fixed on the movable bracket, the display apparatus further comprises a driving mechanism, and the driving mechanism is configured to drive the movable bracket to drive the light-bar unit to move back and forth in a direction perpendicular to the display panel.