Patent ID: 11886059
Assignee: HKC CORPORATION LIMITED
Field: Optics (Instruments)
Classification: CPC G  F | IPC F  G

Claim 7:
8. A control circuit for implementing anti-peeping display of a display apparatus, the display apparatus comprising a display panel and a backlight module, and the backlight module comprising:
a back plate, comprising a bottom plate;
one or more light bars, arranged on a side of the bottom plate, wherein each of the one or more light bars comprises:
a circuit board;
a plurality of first light-emitting units, arranged on the circuit board, and configured to generate diffuse light; and
a plurality of second light-emitting units, arranged on the circuit board, and configured to generate collimated light;

a dimming diaphragm, arranged on a side of the one or more light bars away from the bottom plate, and having a diffusion mode and a transparent mode; and
a driving assembly, arranged on the bottom plate, connected to at least one of the one or more light bars, and configured to drive the light bar to rotate;
the control circuit comprising: a display control module, configured to receive an image signal and control the display panel to display an image according to the image signal;
wherein, the control circuit further comprises: an anti-peeping module, configured to perform following operations:
receiving an anti-peeping signal, and determining an anti-peeping area;
controlling the dimming diaphragm to be alternately switched between the transparent mode and the diffusion mode;
in response to the dimming diaphragm being switched to the transparent mode, disabling a part of the first light-emitting units rotating into the anti-peeping area from emitting light and enabling a part of the second light-emitting units rotating into the anti-peeping area to emit light; and
in response to the dimming diaphragm being switched to the diffusion mode, disabling the part of the first light-emitting units rotating into the anti-peeping area and the part of the second light-emitting units rotating into the anti-peeping area from emitting light.