CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 201911043595.8, filed on Oct. 30, 2019 and entitled “ARRAY SUBSTRATE, METHOD FOR MANUFACTURING SAME, AND DISPLAY DEVICE”, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an array substrate, a method for manufacturing the same, and a display device.

BACKGROUND

With the development of display technologies, more and more display devices are integrated with fingerprint recognition functions.

In the display devices integrated with the fingerprint recognition functions, the array substrate generally includes a base substrate, and an organic light-emitting diode (OLED) and a photoelectric conversion layer which are disposed on the base substrate.

SUMMARY

The present disclosure provides an array substrate, a method for manufacturing the same, and a display device. The technical solutions are as follows:

In one aspect, an array substrate is provided. The array substrate includes a base substrate and an organic light-emitting diode (OLED), a photoelectric conversion layer, and a light-filtering layer which are on the base substrate; wherein

the OLED and the light-filtering layer are both on a side, distal from the base substrate, of the photoelectric conversion layer, an orthographic projection of the photoelectric conversion layer on the base substrate at least partially is overlapped with an orthographic projection of the light-filtering layer on the base substrate, and the orthographic projection of the photoelectric conversion layer on the base substrate is outside an orthographic projection of the OLED on the base substrate; and

the light-filtering layer is light transmittable, and a transmittance of the light-filtering layer to light in a target band is smaller than or equal to a transmittance threshold, a minimum value of the target band being greater than 600 nanometers.

Optionally, the transmittance of the light-filtering layer to light with at least a part of wavelengths outside the target band is greater than the transmittance threshold.

Optionally, the light-filtering layer includes a plurality of first film layers and a plurality of second film layers. In the light-filtering layer, the first film layers and the second film layers are alternatively overlapped in a direction going distally from the base substrate, and refractive indexes of the first film layers are greater than those of the second film layers.

Optionally, a material of the first film layers includes trititanium pentoxide, and a material of the second film layers includes silica.

Optionally, the at least a part of wavelengths includes wavelengths from 480 nanometers to 580 nanometers.

Optionally, the transmittance threshold is one hundredth.

Optionally, a material of the light-filtering layer includes resin.

Optionally, a material of the first film layers includes trititanium pentoxide, and a material of the second film layers includes silica.

Optionally, the light-filtering layer includes six first film layers and six second film layers.

Optionally, the light-filtering layer is between the photoelectric conversion layer and an electro-luminescence layer of the OLED.

Optionally, the array substrate further includes an auxiliary substrate and conforms to any one of the following conditions:

the auxiliary substrate is between the photoelectric conversion layer and the light-filtering layer; and

the auxiliary substrate is between the light-filtering layer and the OLED.

Optionally, the array substrate further includes an auxiliary substrate and an optical collimating layer and conforms to any one of the following conditions:

the auxiliary substrate is between the photoelectric conversion layer and the light-filtering layer, and the optical collimating layer is between the photoelectric conversion layer and the auxiliary substrate; and

the auxiliary substrate is between the light-filtering layer and the OLED, and the optical collimating layer is between the auxiliary substrate and the light-filtering layer.

Optionally, the light-filtering layer is on a side, distal from the base substrate, of the electro-luminescence layer of the OLED.

Optionally, the array substrate further includes an auxiliary substrate between the photoelectric conversion layer and the OLED.

Optionally, the array substrate further includes an optical collimating layer between the photoelectric conversion layer and the auxiliary substrate.

Optionally, the transmittance threshold is one hundredth, and the array substrate conforms to any one condition in a first condition set and any one condition in a second condition set; wherein

the first condition set includes:

a material of the light-filtering layer includes resin;

the light-filtering layer includes six first film layers and six second film layers, wherein in the light-filtering layer, the first film layers and the second film layers are alternatively overlapped in a direction going distally from the base substrate, a material of the first film layers includes trititanium pentoxide, and a material of the second film layers includes silica; and

the light-filtering layer includes six first film layers and six second film layers, wherein in the light-filtering layer, the first film layers and the second film layers are alternatively overlapped in a direction going distally from the base substrate, a material of the first film layers includes titanium oxide, and a material of the second film layers includes silica;

the second condition set includes:

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED;

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED, and the array substrate further includes an auxiliary substrate between the photoelectric conversion layer and the light-filtering layer;

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED, and the array substrate further includes an auxiliary substrate between the light-filtering layer and the OLED;

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED, and the array substrate further includes an auxiliary substrate and an optical collimating layer, wherein the auxiliary substrate is between the photoelectric conversion layer and the light-filtering layer, and the optical collimating layer is between the photoelectric conversion layer and the auxiliary substrate;

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED, and the array substrate further includes an auxiliary substrate and an optical collimating layer, wherein the auxiliary substrate is between the light-filtering layer and the OLED, and the optical collimating layer is between the auxiliary substrate and the light-filtering layer;

the light-filtering layer is between the photoelectric conversion layer and the electro-luminescence layer of the OLED and the array substrate further includes an auxiliary substrate and an optical collimating layer, wherein the auxiliary substrate is between the light-filtering layer and the OLED, and the optical collimating layer is between the photoelectric conversion layer and the light-filtering layer;

the light-filtering layer is on a side, distal from the base substrate, of the electro-luminescence layer of the OLED;

the light-filtering layer is on a side, distal from the base substrate, of the electro-luminescence layer of the OLED and the array substrate further includes an auxiliary substrate between the photoelectric conversion layer and the OLED; and

the light-filtering layer is on a side, distal from the base substrate, of the electro-luminescence layer of the OLED, and the array substrate further includes an auxiliary substrate between the photoelectric conversion layer and the OLED and an optical collimating layer between the photoelectric conversion layer and the auxiliary substrate.

In another aspect, a method for manufacturing an array substrate is provided. The method is used for manufacturing any one of array substrates according to the present disclosure, and the method includes:

forming an OLED, a photoelectric conversion layer and a light-filtering layer on a base substrate;

wherein the OLED and the light-filtering layer are both on a side, distal from the base substrate, of the photoelectric conversion layer, an orthographic projection of the photoelectric conversion layer on the base substrate is at least partially overlapped with an orthographic projection of the light-filtering layer on the base substrate, and the orthographic projection of the photoelectric conversion layer on the base substrate is outside an orthographic projection of the OLED on the base substrate; and

the light-filtering layer is light transmittable, and a transmittance of the light-filtering layer to light in a target band is smaller than or equal to a transmittance threshold, a minimum value of the target band being greater than 600 nanometers.

In yet another aspect, a display device is provided. The display device includes any one of array substrates according to the present disclosure.

