US 11,538,271 B2Granted

Display panel, manufacturing method, and display device

AssigneeBoe Technology Group Co., Ltd.

InventorsMing Liu, Hongwei Tian, Hao Liu, Jing Wang

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Abstract

The present disclosure provides a display panel, a manufacturing method thereof, and a display device. The display panel includes a plurality of optical fingerprint identification structures, each optical fingerprint identification structure includes a display region and a sensing region, the display region includes a driving circuitry layer, a planarization layer, a pixel definition layer, and a light-emitting element, and the light-emitting element includes an anode, a light-emitting material layer and a cathode. The sensing region includes a sensing region opening, an optical sensor and a cathode metal layer, the cathode metal layer includes a first cathode metal layer and a second cathode metal layer, and the first cathode metal layer is separated from the second cathode metal layer by a gap, so that light emitted by the light-emitting element is allowed to enter the optical sensor through the gap after being reflected by a fingerprint.

Claims12

Dependent claims

A display panel, comprising a plurality of optical fingerprint identification structures arranged in an array form, wherein each optical fingerprint identification structure comprises a display region and a sensing region, the display region comprises a driving circuitry layer, a planarization layer, a pixel definition layer and a light-emitting element laminated one on another on a substrate, and the light-emitting element comprises an anode, a light-emitting material layer and a cathode,

wherein the sensing region comprises:
a sensing region opening surrounded by the pixel definition layer, an orthogonal projection of the sensing region opening onto the substrate at least partially overlapping an orthogonal projection of the planarization layer onto the substrate;
an optical sensor arranged between the sensing region opening and the substrate;
and
a cathode metal layer arranged in the sensing region opening,
wherein the cathode metal layer comprises a first cathode metal layer and a second cathode metal layer, the first cathode metal layer extends to the pixel definition layer close to the display region, the first cathode metal layer is coupled to the cathode, the second cathode metal layer extends to the pixel definition layer away from the display region, and the first cathode metal layer is separated from the second cathode metal layer by a gap so that light emitted by the light-emitting element is allowed to enter the optical sensor through the gap after being reflected by a fingerprint.

3 more elements

A method for manufacturing a display panel, the display panel comprising a plurality of optical fingerprint identification structures arranged in an array form, the method comprising:

forming a driving circuitry layer on a substrate;
forming an optical sensor at a position corresponding to a sensing region of the optical fingerprint identification structure;
forming a planarization layer on the driving circuitry layer;
forming an anode on the planarization layer corresponding to a display region of the optical fingerprint identification structure, the anode being electrically coupled to the driving circuitry layer;
forming a pixel definition layer;
forming an opening in the pixel definition layer at a position corresponding to the display region to expose the anode, and forming an opening in the pixel definition layer at a position corresponding to the sensing region to form a sensing region opening for exposing the planarization layer;
forming a light-emitting material layer on the anode;
and
forming a cathode covering the display region on the light-emitting material layer, and forming a cathode metal layer in the sensing region opening,
wherein the cathode metal layer comprises a first cathode metal layer and a second cathode metal layer, the first cathode metal layer extends to the pixel definition layer close to the display region, the first cathode metal layer is coupled to the cathode, the second cathode metal layer extends to the pixel definition layer away from the display region, and the first cathode metal layer is separated from the second cathode metal layer by a gap so that the light emitted by the light-emitting element is allowed to enter the optical sensor through the gap after being reflected by a fingerprint.

7 more elements

Dependencies are inferred from the claim text.