Patent ID: 12201000

Description of reference signs:100: display panel;1: substrate;2: light-emitting layer;3: encapsulation layer;4: light-filtering layer;5: anode;6: pixel barrier layer;7: cathode;21: first light-emitting unit;22: second light-emitting unit;23: third light-emitting unit;31: first inorganic layer;32: organic layer;33: second inorganic layer;41: first light-filtering unit;42: second light-filtering unit;43: planarization unit;44. black barrier unit.

DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION

Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings of the specification to fully introduce the technical content of the present disclosure to those skilled in the art to demonstrate that the present disclosure can be implemented by using examples, so that the technical content disclosed by the present disclosure is clearer. Those skilled in the art can easily understand how to implement the present disclosure. However, the present disclosure can be embodied in many different forms of embodiments, and the protection scope of the present disclosure is not limited to the embodiments mentioned in the text. The description of the following embodiments is not intended to limit the scope of the present disclosure.

The directional terms mentioned in the present invention, such as “up,” “down,” “front,” “rear,” “left,” “right,” “inner,” “outer,” and “side,” are only used to present directions in the drawings, The directional terms herein are used to explain and describe the present disclosure and do not limit the protection scope of the present disclosure.

In the drawings, components with the same structure are denoted by the same reference signs, and components with similar structures or functions are denoted by similar reference signs. In addition, for ease of understanding and description, the size and thickness of each component shown in the drawings are arbitrarily shown. The present disclosure does not limit the size and thickness of each component.

As shown inFIGS.1and2, this embodiment provides a display device, and the display device includes a display panel100. The display panel100includes a substrate1, a light-emitting layer2, an encapsulation layer3, and a light-filtering layer4.

The substrate1may be a flexible substrate, so that the substrate1can have better impact resistance and can effectively protect the display panel100. Material of the substrate1includes one or more of silicon dioxide, polyester resin, polyethylene, polypropylene, polystyrene, polylactic acid, polyethylene terephthalate, polyimide, or polyurethane.

In fact, the display panel100further includes a thin film transistor layer (not shown), and the thin film transistor layer is disposed on one side of the substrate1facing the light-emitting layer2. Specifically, the thin film transistor layer may include a gate layer, a gate insulation layer, an active layer, a source and drain layer, and other film layers, which will not be repeated here. The source and drain layer is electrically connected to the active layer. The thin film transistor layer may adopt a top-gated structure or a bottom-gated structure, which is not limited in this embodiment.

As shown inFIG.1, the display panel100further includes a plurality of anodes5. The plurality of anodes5are spaced apart from each other on a surface of one side of the substrate. Specifically, the thin film transistor layer is disposed between the substrate and the plurality of anodes5. Because nano indium tin metal oxide (ITO) has good conductivity and light transmittance, the material of the plurality of anodes5in this embodiment is preferably ITO. In other embodiments, the material of the plurality of anodes5can also be other materials.

As shown inFIG.1, the display panel further includes a pixel barrier layer6, and the pixel barrier layer6is disposed on the substrate1between two adjacent anodes5. The pixel barrier layer6is mainly used to prevent light crosstalk phenomenon between adjacent light-emitting units.

As shown inFIG.1, the light-emitting layer2is provided on a surface of one side of the substrate1. Specifically, the light-emitting layer2is disposed on a surface of one side of the anode5away from the substrate1. Material of the light-emitting layer2includes organic electroluminescent material.

As shown inFIGS.1and2, the light-emitting layer2includes a first light-emitting unit21, a second light-emitting unit22and a third light-emitting unit23spaced apart from each other. In this embodiment, the first light-emitting unit21is a red light-emitting unit, the second light-emitting unit22is a green light-emitting unit, and the third light-emitting unit23is a blue light-emitting unit.

As shown inFIG.1, the display panel100further includes a cathode7. The cathode7covers a surface of one side of the light-emitting layer2away from the substrate1. Because nano indium tin metal oxide (ITO) has good conductivity and light transmittance, the material of the cathode7in this embodiment is preferably ITO. In other embodiments, the material of the cathode7can also be other materials.

In fact, the display panel100may also include a hole injection layer (not shown), an electron blocking layer (not shown), a hole blocking layer (not shown), an electron injection layer (not shown), etc., which are not repeated here.

As shown inFIG.1, the encapsulation layer3is disposed on a surface of one side of the light-emitting layer2away from the substrate1.

As shown inFIG.3, the encapsulation layer3may include a first inorganic layer31, an organic layer32, and a second inorganic layer33. The first inorganic layer31is disposed on a surface of one side of the light-emitting layer2away from the substrate1. The organic layer32is disposed on a surface of one side of the first inorganic layer31away from the substrate1. The second inorganic layer33is disposed on a surface of one side of the organic layer32away from the substrate1. The first inorganic layer31and the second inorganic layer33mainly play a role of blocking water and oxygen. In addition, the organic layer32mainly buffers and releases the stress on the encapsulation layer3to increase the bendability of the display panel100.

As shown inFIG.1, the light-filtering layer4is disposed on a surface of one side of the encapsulation layer3away from the substrate1.

As shown inFIGS.1and2, the light-filtering layer4includes a first light-filtering unit41, a second light-filtering unit42, and a planarization unit43that are spaced apart from each other.

As shown inFIGS.1and2, the first light-filtering unit41is disposed opposite to the first light-emitting unit21. Specifically, a projection area of the first light-emitting unit21on the substrate1locates within a projection area of the first light-filtering unit41on the substrate1.

As shown inFIG.4, because the first light-emitting unit21is a red light-emitting unit, in order to improve purity of light emitted by the first light-emitting unit21, a light-filtered wavelength of the first light-filtering unit41is less than 630 nm, that is, the first light-filtering unit41absorbs and filters light with a wavelength less than 630 nm.

Material of the first light-filtering unit41is red dye. The red dye includes one or more of rhodamine-based red dye, anthraquinone-based polymer resin red dye, or iron oxide red dye.

As shown inFIGS.1and2, the second light-filtering unit42is disposed opposite to the second light-emitting unit22. Specifically, a projection area of the second light-emitting unit22on the substrate1locates within a projection area of the second light-filtering unit42on the substrate1.

As shown inFIG.5, because the second light-emitting unit22is a green light-emitting unit, in order to improve purity of light emitted by the second light-emitting unit22, a light-filtered wavelength of the second light-filtering unit42is greater than 530 nm, that is, the second light-filtering unit42absorbs and filters light with a wavelength greater than 530 nm.

The material of the second light-filtering unit42is green dye. The green dye includes one or more of malachite green dye, phthalocyanine green dye, or azo green dye.

As shown inFIGS.1and2, the planarization unit43is disposed opposite to the third light-emitting unit23. Because the third light-emitting unit23is a blue light-emitting unit, and light emitted by a current blue light-emitting unit basically meets the BT2020 color gamut requirements in terms of light color, this embodiment does not adjust light emitted from the third light-emitting unit23. Material of the planarization unit43can be a transparent light-transmitting material. A surface of one side of the light-filtering layer4away from the substrate1can be a planar surface, and production costs of the display panel can avoid increasing.

As shown inFIG.1, the filter layer4further includes a plurality of black barrier units44. The plurality of black barrier units are disposed on the encapsulation layer3between the first light-filtering unit41, the second light-filtering unit42, and the flat unit43. Each of the black barrier units44are mainly used to prevent light crosstalk phenomenon between adjacent light-emitting units.

As shown inFIGS.6and7, in this embodiment, the light-filtering layer4is provided on the light-emitting layer2. The light-filtering layer4is used to filter and adjust light emitted by the light-emitting layer2, thereby improving luminous purity of the red light-emitting unit and the green light-emitting unit, thereby adjusting the light emitted by the light-emitting layer2of the display panel100to R (0.708, 0.292), G (0.170, 0.797), and B (0.131, 0.046), thereby effectively achieving high BT2020 color gamut coverage and finally improving color display capability of the display panel100.

The above description is a detailed introduction to a display panel and a display device provided by the present disclosure. Herein, specific examples are used to illustrate the principles and implementations of the present disclosure. The description of the above embodiments is only used to help understand the methods and core ideas of the present disclosure. At the same time, according to the ideas of the present disclosure, for those skilled in the art, there will be changes in the specific implementation and scope of application. In summary, the content of the present disclosure should not be understood as a limitation to the present disclosure.