Display panel, preparation method therefor and display apparatus

Patent metadata

Field	Value
Publication number	US-12033425-B2
Application number	US-202117797318-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	Jan 14, 2021
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

Provided is a display panel including a base substrate, a display function film layer, a filter film layer, and a fingerprint recognition circuit. The display function film layer is disposed on the base substrate, and the display function film layer is provided with a plurality of light-emitting regions. The filter film layer is disposed on a side of the display function film layer away from the base substrate, wherein the filter film layer is capable of transmitting light emitted from the plurality of light-emitting regions, and a material of the filter film layer comprises a conductive material. The fingerprint recognition circuit is disposed on the base substrate, wherein the fingerprint recognition circuit is connected to the filter film layer, and configured for fingerprint recognition based on light reflected by an obstacle and received by the filter film layer.

First claim

What is claimed is:

1. A display panel, comprising:
a base substrate;
a display function film layer disposed on the base substrate, the display function film layer being provided with a plurality of light-emitting regions;
a filter film layer disposed on a side of the display function film layer away from the base substrate, wherein the filter film layer is capable of transmitting light emitted from the plurality of light-emitting regions, and a material of the filter film layer comprises a conductive material; and
a fingerprint recognition circuit disposed on the base substrate, wherein the fingerprint recognition circuit is connected to the filter film layer, and configured for fingerprint recognition by using the filter film layer as a detection plate of a capacitive fingerprint recognition circuit.

2. The display panel according to claim 1 , wherein an orthographic projection of the filter film layer on the base substrate covers an orthographic projection of at least one light-emitting region of the plurality of light-emitting regions on the base substrate.

3. The display panel according to claim 2 , wherein the filter film layer comprises: a plurality of filter patterns in one-to-one correspondence to the plurality of light-emitting regions, wherein at least one filter pattern of the plurality of filter patterns is connected to the fingerprint recognition circuit, an orthographic projection of the at least one filter pattern on the base substrate covers an orthographic projection of one corresponding light-emitting region on the base substrate, and the at least one filter pattern is capable of transmitting light emitted from the one corresponding light-emitting region.

4. The display panel according to claim 1 , wherein a distance between an edge of at least one filter pattern and an edge of the light-emitting region covered by the filter pattern ranges from 1 μm to 4 μm.

5. The display panel according to claim 1 , wherein the material of the filter film layer comprises a metal material and an inorganic material.

6. The display panel according to claim 5 , wherein the filter film layer comprises: at least two inorganic film layers made of the inorganic material, and at least one metal film layer made of the metal material; wherein
the at least one metal film layer is disposed between the at least two inorganic film layers.

7. The display panel according to claim 6 , wherein one metal film layer is disposed between every two adjacent inorganic film layers.

8. The display panel according to claim 7 , wherein the filter film layer comprises: two inorganic film layers and one metal film layer.

9. The display panel according to claim 7 , wherein the filter film layer comprises: three inorganic film layers and two metal film layers.

10. The display panel according to claim 6 , wherein
a thickness of each inorganic film layer ranges from 50 nm to 250 nm; and
a thickness of each metal film layer ranges from 300 nm to 1000 nm.

11. The display panel according to claim 6 , wherein the inorganic material comprises at least one of silicon nitride and silicon oxide; and the metal material comprises at least one of molybdenum, aluminum, and molybdenum oxide.

12. The display panel according to claim 1 , further comprising: thin-film encapsulation film layer; wherein
the thin-film encapsulation film layer is disposed between the filter film layer and the display function film layer.

13. The display panel according to claim 12 , wherein the thin-film encapsulation film layer comprises: a first thin-film encapsulation layer, a second thin-film encapsulation layer, and a third thin-film encapsulation layer which are laminated in sequence along a direction away from the base substrate; wherein
materials of the first thin-film encapsulation layer and the third thin-film encapsulation layer comprise an inorganic material, and a material of the second thin-film encapsulation layer comprises an organic material.

14. The display panel according to claim 1 , further comprising: a black matrix layer disposed on a side of the filter film layer away from the base substrate; wherein
an orthographic projection of the black matrix layer on the base substrate and orthographic projections of the plurality of light-emitting regions on the base substrate are not overlapped or merely partially overlapped.

15. The display panel according to claim 1 , wherein the display function film layer comprises: a plurality of pixel circuits and a plurality of light-emitting units in one-to-one correspondence to the plurality of pixel circuits; wherein
each light-emitting unit is connected to one corresponding pixel circuit, and the region where each light-emitting unit is disposed forms one light-emitting region.

16. A method for preparing a display panel, comprising:
providing a base substrate;
forming a display function film layer on the base substrate, the display function film layer being provided with a plurality of light-emitting regions;
forming a filter film layer on a side of the display function film layer away from the base substrate, wherein the filter film layer is capable of transmitting light emitted from the plurality of light-emitting regions, and a material of the filter film layer comprises a conductive material; and
forming a fingerprint recognition circuit on the base substrate, wherein the fingerprint recognition circuit is connected to the filter film layer, and configured for fingerprint recognition by using the filter film layer as a detection plate of a capacitive fingerprint recognition circuit.

17. A display apparatus, comprising: a fingerprint recognition driving circuit and a display panel; wherein the display panel comprises:
a base substrate;
a display function film layer disposed on the base substrate, the display function film layer being provided with a plurality of light-emitting regions;
a filter film layer disposed on a side of the display function film layer away from the base substrate, wherein the filter film layer is capable of transmitting light emitted from the plurality of light-emitting regions, and a material of the filter film layer comprises a conductive material; and
a fingerprint recognition circuit disposed on the base substrate, wherein the fingerprint recognition circuit is connected to the filter film layer, and configured for fingerprint recognition by using the filter film layer as a detection plate of a capacitive fingerprint recognition circuit; and
wherein the fingerprint recognition driving circuit is connected to the fingerprint recognition circuit in the display panel, and is configured to provide a driving signal for the fingerprint recognition circuit.

18. The display apparatus according to claim 17 , wherein an orthographic projection of the filter film layer on the base substrate covers an orthographic projection of at least one light-emitting region of the plurality of light-emitting regions on the base substrate.

19. The display apparatus according to claim 18 , wherein the filter film layer comprises: a plurality of filter patterns in one-to-one correspondence to the plurality of light-emitting regions, wherein at least one filter pattern of the plurality of filter patterns is connected to the fingerprint recognition circuit, an orthographic projection of the at least one filter pattern on the base substrate covers an orthographic projection of one corresponding light-emitting region on the base substrate, and the at least one filter pattern is capable of transmitting light emitted from the on

Assignees

• Boe Technology Group Co Ltd

Inventors

• Qu Caiyu
• Hao Yanjun
• Liu Hao
• Wang Hejin
• Zhang Huijuan
• Liu Zheng

Classifications

• G02B5/201

  in the form of arrays · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title