DISPLAY SCREEN, ELECTRONIC DEVICE AND METHOD FOR THREE-DIMENSIONAL FEATURE RECOGNITION
FIG5 is a schematic diagram of a generating process of a reference image according to an embodiment of the present disclosure  FIG6 is a schematic diagram of a target image generating process of a target object according to an embodiment of the present disclosure
FIG5 illustrates a schematic diagram of a target image generating process of a target object according to an embodiment of the present disclosure. A reference object B1 is positioned in front of the display screen 1 in a plane parallel to the display screen 1. The plurality of infrared emitting elements 12 emits reference infrared light to illuminate the reference object B1, such that a plurality of reference light spots is formed on the reference object B1. The plurality of photosensitive elements 13 receives light spots reflected from the reference object B1 in response to the plurality of reference light spots and converts the received light spots into reference photo-electrical signals. The processor 2 performs an image processing operation to obtain a reference image according to the reference photo-electrical signals.  FIG6 illustrates a schematic diagram of a target image generating process of a target object according to an embodiment of the present disclosure. When a target object B2 such as an user's face is positioned in front of the display screen 1, due to the unevenness of the user's face, infrared light emitted by the plurality of infrared emitting elements 12 illuminate the user's face such that a plurality of light spots is formed on the user's face. The location of target light spots which are reflected from the user's face in response to the plurality of light spots projected on the display screen 1 may has an offset corresponding to the location of reference target light spots which are reflected from the two-dimensional face image. The size of the offset is determined by the depth information of the user's face.
schematic diagram
5
power
12
infrared emitting elements infrared emitting element
13
photosensitive elements photosensitive element
['1. A display screen (1), comprising: a plurality of display units (11) distributed in an array across a display area (A0) of the display screen (1); a plurality of infrared emitting elements (12) embedded in a first area (A1) of the display area (A0), the plurality of infrared emitting elements (12) configured to emit infrared light for illuminating a target object in front of the display screen (1) so as to form a plurality of light spots on the target object; and a plurality of photosensitive elements (13) embedded in a second area (A2) of the display area (A0), the plurality of photosensitive elements (13) configured to receive target light spots reflected from the target object and convert the target light spots into photo-electrical signals suitable for generating a target image of the target object.', '11. The electronic device of claim 10, wherein the electronic device (100) further comprises a power (5) and a switch assembly (6), the switch assembly (6) connected between the plurality of infrared emitting elements (12) and the power (5), and wherein the processor (2) is further configured to: control the switch assembly (6) to enable a connection between the power (5) and the plurality of infrared emitting elements (12) upon receiving an input operation requesting face recognition verification so as to apply an operating voltage to the plurality of infrared emitting elements (12) to excite the plurality of infrared emitting elements (12) to emit infrared light to a front of the display screen (1).']