US 12,260,671 B2
Under-screen fingerprint identification system, backlight module, light source assembly and display screen
Gang Wang, Beijing (CN)
Assigned to BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed by BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed on Jun. 3, 2020, as Appl. No. 16/892,109.
Claims priority of application No. 201911063191.5 (CN), filed on Oct. 31, 2019.
Prior Publication US 2021/0133419 A1, May 6, 2021
Int. Cl. G06V 40/13 (2022.01); G09G 3/34 (2006.01); G09G 3/36 (2006.01); H04M 1/02 (2006.01)
CPC G06V 40/1318 (2022.01) [G09G 3/3406 (2013.01); G09G 3/3648 (2013.01); H04M 1/0266 (2013.01); H04M 2201/38 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A display screen, comprising:
a display panel;
a backlight module, disposed under the display panel and comprising a backlight source configured to provide backlight;
an under-screen fingerprint identification system, comprising a fingerprint light source configured to provide fingerprint identification light, a fingerprint sensor configured to receive the fingerprint identification light; and
a first holder and a second holder formed integrally and fixed under the display panel, wherein the first holder as a whole is located directly below the second holder, the backlight source is disposed within the first holder, and the fingerprint light source is disposed within the second holder, a first opening is disposed at a side of the first holder, and a second opening is disposed at a top of the second holder, the first opening is oriented horizontally toward a light guide part to form a lateral U-shaped holder to realize a function of side emission, and the second opening is oriented vertically toward the display panel to form an upward U-shaped holder to realize a function of top illumination such that light emitting direction of the fingerprint light source is away from the backlight source,
wherein the fingerprint light source and the backlight source are disposed integrally to form a twin structure and the fingerprint light source is located above the backlight source; the fingerprint sensor is disposed under the backlight module, and the fingerprint sensor is disposed under the backlight module, and the fingerprint light source does not occupy transverse space of the display screen; and
the display screen is configured to have the fingerprint identification light emitted from the fingerprint light source transmit through the display panel to a finger, be reflected by the finger and then transmitted through the display panel and the backlight module to the fingerprint sensor.