Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11437447-B2
Application number	US-202117203064-A
Country	US
Kind code	B2
Filing date	Mar 16, 2021
Priority date	Nov 30, 2020
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

Provided are a display device and a manufacturing method thereof. The display device includes an organic light-emitting display panel and a fingerprint identification assembly disposed on a non-light-emitting display side of the organic light-emitting display panel. The fingerprint identification assembly includes a first substrate, a fingerprint identification unit and a light-shielding structure. The fingerprint identification unit and the light-shielding structure are disposed on a same side of the first substrate. The light-shielding structure is disposed between the fingerprint identification unit and the organic light-emitting display panel; the light-shielding structure includes at least two light-shielding layers, each light-shielding layer includes light-transmissive portions and at least one light-shielding portion, and the light-transmissive portions are at least partially surrounded by the light-shielding portion; in a direction perpendicular to the first substrate, positions of light-transmissive portions in one light-shielding layer are in one-to-one correspondence with positions of light-transmissive portions in another one light-shielding layer.

First claim

What is claimed is:

1. A display device, comprising: an organic light-emitting display panel and a fingerprint identification assembly disposed on a non-light-emitting display side of the organic light-emitting display panel;
wherein the fingerprint identification assembly comprises a first substrate, a fingerprint identification unit and a light-shielding structure, and the fingerprint identification unit and the light-shielding structure are disposed on a same side of the first substrate;
wherein the light-shielding structure is disposed between the fingerprint identification unit and the organic light-emitting display panel; the light-shielding structure comprises at least two light-shielding layers, each of the at least two light-shielding layers comprises light-transmissive portions and at least one light-shielding portion, and the light-transmissive portions are at least partially surrounded by the at least one light-shielding portion; and in a direction perpendicular to the first substrate, positions of light-transmissive portions in one of the at least two light-shielding layers are in one-to-one correspondence with positions of light-transmissive portions in another one of the at least two light-shielding layers;
wherein the at least two light-shielding layers comprise a first light-shielding layer, a second light-shielding layer, and a third light-shielding layer; the second light-shielding layer is disposed between the first light-shielding layer and the third light-shielding layer; and the first light-shielding layer is disposed between the second light-shielding layer and the fingerprint identification unit; and
wherein the display device further comprises: a first dielectric layer, a second dielectric laver, and a third dielectric layer, wherein the first dielectric layer is disposed between the fingerprint identification unit and the first light-shielding layer, the second dielectric layer is disposed between the first light-shielding layer and the second light-shielding layer, and the third dielectric layer is disposed between the second light-shielding layer and the third light-shielding laver.

2. The display device of claim 1 , wherein in a same light-shielding layer, the at least one light-shielding portion encircles the light-transmissive portions, and the light-transmissive portions are arranged in an array in a first direction and a second direction, wherein the first direction intersects the second direction.

3. The display device of claim 1 , further comprising: a lens array disposed between the light-shielding structure and the organic light-emitting display panel;
wherein the lens array comprises a plurality of converging lenses, and in the direction perpendicular to the first substrate, each of the plurality of converging lenses covers at least one of the light-transmissive portions in a same one of the at least two light-shielding layers.

4. The display device of claim 3 , wherein each of the plurality of converging lenses is hemispherical in shape, and the plurality of converging lenses are arranged in an array in a first direction and a second direction, wherein the first direction intersects the second direction.

5. The display device of claim 4 , wherein each of the plurality of converging lenses has a diameter of D 1 , and 8 μm≤D 1 ≤16 μm; and
each of the light-transmissive portions is circular in shape and has a diameter of D 2 , and 2 μm≤D 2 ≤5 μm.

6. The display device of claim 3 , wherein the fingerprint identification assembly comprises a plurality of fingerprint identification units; and in the direction perpendicular to the first substrate, a number of converging lenses covered by each of fingerprint identification units is greater than or equal to six and is less than or equal to nine.

7. The display device of claim 1 , wherein the light-shielding structure and the fingerprint identification unit are both disposed between the first substrate and the organic light-emitting display panel.

8. The display device of claim 7 , further comprising: a lens array disposed between the light-shielding structure and the organic light-emitting display panel;
wherein the lens array comprises a plurality of converging lens, and in the direction perpendicular to the first substrate, each of the plurality of converging lenses covers at least one of the light-transmissive portions in a same one of the at least two light-shielding layers; and
wherein the lens array is integrated on the first substrate.

9. The display device of claim 7 , further comprising: a lens array disposed between the light-shielding structure and the organic light-emitting display panel, wherein the lens array comprises a plurality of converging lens, and in the direction perpendicular to the first substrate, each of the plurality of converging lenses covers at least one of the light-transmissive portions in a same one of the at least two light-shielding layers; and
a second substrate disposed between the light-shielding structure and the organic light-emitting display panel, wherein the second substrate comprises a plurality of first grooves, and each of the plurality of converging lenses is disposed in a respective one of the plurality of first grooves.

10. The display device of claim 9 , further comprising: a first encapsulant which is annular in shape;
wherein in the direction perpendicular to the first substrate, the first encapsulant is disposed between the second substrate and the light-shielding structure.

11. The display device of claim 9 , further comprising: a second encapsulant which is annular in shape;
wherein in the direction perpendicular to the first substrate, the second encapsulant is disposed between the light-shielding structure and the fingerprint identification unit.

12. The display device of claim 1 , wherein the light-shielding structure and the fingerprint identification unit are both disposed on a side of the first substrate facing away from the organic light-emitting display panel.

13. The display device of claim 12 , further comprising: a lens array disposed between the light-shielding structure and the organic light-emitting display panel;
wherein the lens array comprises a plurality of converging lens, and in the direction perpendicular to the first substrate, each of the plurality of converging lenses covers at least one of the light-transmissive portions in a same one of the at least two light-shielding layers; and
wherein the first substrate comprises a plurality of second grooves, and each of the plurality of converging lens is disposed in a respective one of the plurality of second grooves.

14. The display device of claim 1 , wherein
in the direction perpendicular to the first substrate, a sum of a thickness of the first dielectric layer, a thickness of the second dielectric layer and a thickness of the third dielectric layer is greater than or equal to 9 μm.

15. A manufacturing method of a display device, comprising:
providing an organic light-emitting display panel;
providing a first substrate;
forming a fingerprint identification unit and a light-shielding structure on a side of the first substrate; and
securing the first substrate on which the fingerprint identification unit and the light-shielding structure are formed to a non-light-emitting display side of the organic light-emitting display, panel;
wherein the light-shielding structure is disposed between the fingerprint identification unit and the organic light-emitting display panel; the light-shielding structure comprises at least two light-shielding layers, each of the at least two light-shielding layers comprises

Assignees

• Xiamen Tianma Micro Electronics Co Ltd

Inventors

• Liu Bingping
• Wu Xiaoxiao
• Chen Guozhao

Classifications

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06V40/1324 Primary

  by using geometrical optics, e.g. using prisms (G06V40/1312 takes precedence) · CPC title