Patent ID: 11893822
Assignee: VIVO MOBILE COMMUNICATION CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 18:
19. A terminal device, comprising a display module, an optical fingerprint sensor, at least two backlight assemblies, and a light emitter, wherein the display module comprises a display screen and a light-transmissive cover that covers the display screen; the light emitter and the display screen are both fastened onto an inner surface of the light-transmissive cover, the optical fingerprint sensor is provided on a side of the display screen facing away from the light-transmissive cover, and the at least two backlight assemblies are provided sequentially between the display screen and the optical fingerprint sensor; along a direction from the display screen to the optical fingerprint sensor, areas of light-transmissive regions of the at least two backlight assemblies are step-like; and light emitted by the light emitter experiences a finger, and then successively passes through the display module and the light-transmissive regions and is projected onto the optical fingerprint sensor,
wherein the backlight assembly comprises a light-shielding ring, a first light-enhancing film, a second light-enhancing film, a diffusion film, a light guide plate, and a reflective film that are sequentially arranged in a direction away from the display screen; a region, corresponding to the light-transmissive region, of the diffusion film is provided with a first avoidance hole, and a region, corresponding to the light-transmissive region, of the reflective film is provided with a second avoidance hole; and for regions, corresponding to the light-transmissive region, of the first light-enhancing film, the second light-enhancing film, and the light guide plate, outer surfaces of the regions facing towards the display screen are all flat surfaces.