Patent ID: 11860400
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 7:
8. The backlight component according to claim 1, backlight component further comprises: a light absorbing layer, at least one projective coupling grating and at least one reflective coupling grating;
the light guide plate is between the light emitting device and the optical element, and the optical element includes a holographic microstructure with a polarization-dependent characteristic;
the projective coupling grating is on the light emitting surface of the light guide plate, and the reflective coupling grating is on the surface away from the light emitting surface, and the light intensity ratio corresponding to the coupling gratings is positively correlated with the distance between the coupling grating and the optical element; each of the coupling gratings is configured to: convert the parallel beam that is incident to be an emitting beam at a light intensity ratio corresponding to the position where the coupling grating is located, the emitting beam being a collimated beam propagating in a direction away from the light guide plate;
the light absorbing layer is on at least one side of the light guide plate, the orthographic projection of the light emitting device on the light emitting surface of the light guide plate is in the orthographic projection of the light absorbing layer on the light emitting surface.