WO2020248704A1

WO2020248704A1 - Display device

Info

Publication number: WO2020248704A1
Application number: PCT/CN2020/084937
Authority: WO
Inventors: 先建波; 程鸿飞; 徐健; 乔勇; 马永达
Original assignee: 京东方科技集团股份有限公司; 北京京东方技术开发有限公司
Priority date: 2019-06-11
Filing date: 2020-04-15
Publication date: 2020-12-17
Also published as: CN209674771U

Abstract

A display device. The display device comprises a quantum dot optical film (10), a light source (20), and a quantum dot enhancement layer (30); the quantum dot enhancement layer (30) is provided between the quantum dot optical film (10) and the light source (20); light emitted by the light source (20) comprises the light of a first wavelength band; the light emitted by the quantum dot optical film (10) comprises the light of a second wavelength band; the light emitted by the quantum dot enhancement layer (30) comprises the light of a third wavelength band; the wavelength of the light of the third wavelength band is between the wavelength of the light of the first wavelength band and the wavelength of the light of the second wavelength band.

Description

Display device

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201920871535.4 named "A Display Device" filed with CNIPA on June 11, 2019, the full text of which is incorporated herein by reference for all purposes.

Technical field

The embodiment of the present disclosure relates to a display device.

Background technique

Currently, quantum dot display technology is widely used in the display field. Quantum dot displays belong to semiconductor nanocrystal technology, which can accurately deliver light, efficiently increase the color gamut of the display, make colors pure and bright, and make color performance more tense.

Summary of the invention

An embodiment of the present disclosure provides a display device.

At least one embodiment of the present disclosure provides a display device, including: a quantum dot optical film, a light source, and a quantum dot enhancement layer; the quantum dot enhancement layer is disposed between the quantum dot optical film and the light source; wherein, The light emitted by the light source includes light in the first waveband; the light emitted by the quantum dot optical film includes light in the second waveband; the light emitted by the quantum dot enhancement layer includes light in the third waveband; the third waveband The wavelength of the light is between the wavelengths of the light in the first wavelength band and the light in the second wavelength band.

For example, the quantum dot optical film includes a quantum dot region and a non-quantum dot region, and the non-quantum dot region is disposed on the periphery of the quantum dot region; and the quantum dot enhancement layer is at least in the corresponding non-quantum dot region The position of the edge area is provided with an enhanced area.

For example, the distance between the enhanced region and the quantum dot region in a direction parallel to the quantum dot optical film is about 0.1 μm to about 5 mm.

For example, the quantum dot optical film includes a quantum dot color film, and a composite optical film is also provided between the light source and the quantum dot enhancement layer, or between the quantum dot enhancement layer and the quantum dot optical film .

For example, the density of at least part of the quantum dots of the quantum dot enhancement layer increases sequentially from the first direction from the non-quantum dot region to the quantum dot region; and/or; the quantum dots of the quantum dot enhancement layer The magnitudes of are sequentially decreased along the first direction.

For example, the density of at least part of the quantum dots of the quantum dot enhancement layer is greater than the density of the quantum dots in the corresponding position of the quantum dot optical film; and/or the radius of the quantum dots of the quantum dot enhancement layer is greater than that of the quantum dot optical film The radius of the quantum dot at the corresponding position; and/or the area of the quantum dot of the quantum dot enhancement layer is larger than the area of the quantum dot at the corresponding position of the quantum dot optical film.

For example, the display device further includes: a backlight module functional film; the backlight module functional film includes: at least one of a light guide plate, a reflective film, or a prism film; wherein the light guide plate and the quantum dot enhancement layer are combined The light guide plate is provided with light guide mesh dots on one side; the quantum dots of the quantum dot enhancement layer are provided on the side of the light guide plate facing away from the light guide mesh dots; or, the reflective film and the quantum dot enhancement layer Composite arrangement, the quantum dot enhancement layer is arranged at least on the peripheral area of the reflective film, and the quantum dot enhancement layer is arranged on the side of the reflective film facing the quantum dot optical film; or, the prism The film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged at least in the peripheral area of the prism film, and the quantum dot enhancement layer is arranged on the prism film facing the quantum dot optical film One side.

For example, the enhanced area is at least arranged on a side close to the light source.

For example, the size of the quantum dots of the quantum dot enhancement layer gradually decreases in the second direction.

For example, the sizes of the quantum dots of the enhanced region are staggered in a direction perpendicular to the first direction.

For example, the quantum dots of the enhanced region are arranged on both sides of the enhanced region, and the density of the quantum dots on both sides of the enhanced region is less than the density in the middle; wherein, the two sides of the enhanced region and the two sides of the light source The position on the side corresponds.

For example, when the wavelength of the light emitted by the light source includes 446nm-464nm, the wavelength of the light emitted by the quantum dot optical film includes: 620nm-760nm and 500nm-578nm; when the wavelength of the light emitted by the light source includes: 400nm When -430nm, the wavelength of light emitted by the quantum dot optical film includes: 620nm-760nm, 500nm-578nm, and 446nm-464nm; wherein the wavelength of light emitted by the quantum dot enhancement layer includes 530nm-610nm.

For example, at least one edge corner of the quantum dot enhancement layer has a predetermined size area without quantum dots.

For example, the size of at least part of the quantum dots of the enhanced region gradually decreases or is arranged in a staggered third direction, and the third direction is a direction that forms a certain angle with the second direction.

For example, the angle is about 10 degrees to about 60 degrees.

Description of the drawings

Hereinafter, the embodiments of the present disclosure will be described in more detail in conjunction with the accompanying drawings, so that those of ordinary skill in the art can understand the embodiments of the present disclosure more clearly, in which:

FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of a quantum dot optical film provided by an embodiment of the present disclosure;

3A-3C are schematic structural diagrams of a quantum dot enhancement layer provided by an embodiment of the present disclosure;

4 is a schematic structural diagram of a quantum dot enhancement layer and a quantum dot optical film provided by an embodiment of the present disclosure;

5A-5B are schematic structural diagrams of another display device provided by an embodiment of the present disclosure;

6 is a schematic structural diagram of another quantum dot enhancement layer provided by an embodiment of the present disclosure;

FIG. 7 is a structural schematic diagram of a quantum dot enhancement layer and a light source provided by an embodiment of the present disclosure; and

FIG. 8 is a schematic structural diagram of another quantum dot enhancement layer and a light source provided by an embodiment of the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present disclosure. It should be noted that the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present disclosure, and cannot be understood as a limitation to the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second", "third" and similar words used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. "Include" or "include" and other similar words mean that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, but do not exclude other elements or items. "Up", "Down", etc. are only used to indicate the relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

The inventor noticed that the quantum dot display in the related art has a poor light mixing effect due to the quantum dot structure, which affects the display effect of the quantum dot display. For example, the quantum dot display may appear red, green or blue in color.

In some embodiments of the present disclosure, referring to FIG. 1, a display device is provided, including:

Quantum dot optical film 10, light source 20 and quantum dot enhancement layer 30;

The quantum dot enhancement layer 30 is arranged between the quantum dot optical film 10 and the light source 20.

The light emitted by the light source 20 includes light in the first wavelength band; the light emitted by the quantum dot optical film 10 includes light in the second wavelength band; the light emitted by the quantum dot enhancement layer 30 includes light in the third wavelength band; The wavelength of the light in the third wavelength band is between the wavelengths of the light in the first wavelength band and the light in the second wavelength band.

The light emitted by the light source 20, the light emitted by the quantum dot enhancement layer 30, and the light emitted by the quantum dot optical film 10 can be mixed to produce light in the fourth luminous wavelength band. It can be monochromatic light or mixed color light of multiple colors. For example: the light in the fourth band is white light.

For example, in the embodiment of the present disclosure, when the light in the first wavelength band emitted by the light source is blue, the edge of the quantum dot optical film is likely to produce reddish light, and the third wavelength light emitted by the quantum dot enhancement layer is selected as yellow light. , The yellow light emitted by the quantum dot enhancement layer is mixed with the blue light emitted by the light source to obtain green light. After the green light is mixed with the red light of the quantum dot optical film and the blue light of the light source, white light is obtained, and the white light passes through the quantum dot optical film. After absorption, the human eye will not see the reddish light emitted by the display device, or the reddish light will be weakened.

In the embodiment of the present disclosure, the light source includes: a direct-type light source or an edge-type light source.

For example, the quantum dot optical film is a quantum dot color film or a quantum dot backlight module optical film; wherein, the quantum dot color film can emit light of at least one of red, green, and blue. The quantum dot enhancement layer can be composited with the functional film in the backlight module, for example, composited with a light guide plate, a reflective film, or a prism film.

In an embodiment of the present disclosure, referring to FIG. 2, the quantum dot optical film 10 includes a quantum dot region 11 and a non-quantum dot region 12; the non-quantum dot region 12 is disposed on the periphery of the quantum dot region 11; refer to 3A-3C, the quantum dot enhancement layer 30 is provided with an enhancement region 31 at least at a position corresponding to the edge region of the non-quantum dot region.

The reinforced area 31 can be arranged on the outer side of the edge area, as shown in Fig. 3A; it can also be arranged on the inner side of the edge area, as shown in Fig. 3C.

In the embodiments of the present disclosure, quantum dots can be provided in the entire quantum dot enhancement layer, or only in the enhanced area. The non-enhanced area of the quantum dot enhancement layer has no quantum dots or the density of quantum dots is low and below the threshold . For example: the threshold is 0.5-20 quantum dots/square centimeter.

In the embodiments of the present disclosure, referring to FIGS. 3A-3B, the edge area may be at least one side area of the quantum dot optical film, or may be an annular edge area surrounded by each side of the quantum dot optical film. The region 31 is also at least one side area of the quantum dot enhancement layer 30, as shown in FIG. 3A, and may also be an annular edge area surrounded by each side of the quantum dot enhancement layer 30, as shown in FIG. 3B.

In the non-quantum dot area, there may be no quantum dots, or the density of quantum dots is low or lower than a preset threshold. For example: the threshold is about 0.5 to about 20 quantum dots/square centimeter.

In the embodiment of the present disclosure, referring to FIG. 4, the distance A between the enhanced region 31 and the quantum dot region 11 in a direction parallel to the quantum dot optical film is about 0.1 μm to about 5 mm.

In the embodiment of the present disclosure, referring to FIGS. 5A-5B, when the quantum dot optical film 10 includes a quantum dot color film, a composite optical film 40 is also provided between the light source and the quantum dot enhancement layer, as shown in FIG. 5A As shown, or there is a composite optical film 40 between the quantum dot enhancement layer and the quantum dot optical film, as shown in FIG. 5B.

In the embodiment of the present disclosure, the composite optical film 40 includes a polarizer and a compensation film. The composite optical film 40 may be one of a polarizer, a compensation film, or a combination thereof. The composite optical film 40 may be a single-layer or multi-layer composite functional combination film. For example, the polarizer plays a role of filtering, and the compensation film can reduce the amount of light leakage of the display in the dark state.

For example, the density of at least part of the quantum dots of the quantum dot enhancement layer 30 sequentially increases from the first direction from the non-quantum dot region to the quantum dot region, and/or the quantum dots of the quantum dot enhancement layer 30 The size of the dots decreases sequentially along the first direction. For example: the first direction can be the X direction, as shown in FIG. 7.

For example, the size of at least part of the quantum dots 311 of the enhanced region is staggered in a second direction that crosses the first direction shown.

For example, the first direction (for example, the X direction) is perpendicular to the second direction (for example, the Y direction), as shown in FIG. 7.

For example, the size of at least part of the quantum dots 311 of the enhanced region gradually decreases or is arranged in a staggered manner in the third direction (for example, the Z direction). The third direction (for example, the Z direction) is a direction that forms a certain angle with the second direction Y, for example, the angle is about 10-60 degrees.

FIG. 7 shows that the sizes of the quantum dots 311 of the enhanced region are staggered in the second direction Y.

The staggered arrangement in the second direction Y means that along the second direction Y, the sizes of the quantum dots 311 in the enhanced region are arranged in a pattern of "size, size, and size...".

For example, the size of the quantum dots of the quantum dot enhancement layer 30 is staggered in the first direction X from the non-quantum dot area to the quantum dot area, which means that the size of the quantum dots 311 in the first direction X is also in accordance with The "size, size, size..." pattern is arranged, as shown in Figure 8.

For example, in the embodiments of the present disclosure, the arrangement trend of the quantum dots of the quantum dot optical film is consistent with the quantum dot enhancement layer. For example, the density of the quantum dots of the quantum dot optical film 10 increases sequentially from the first direction from the edge region to the quantum dot region; and/or the size of the quantum dots of the quantum dot optical film 10 is along the The first direction decreases sequentially.

In the embodiment of the present disclosure, the density of the quantum dots of the quantum dot enhancement layer 30 is greater than the density of the quantum dots in the corresponding position of the quantum dot optical film 10, and/or the radius of the quantum dots of the quantum dot enhancement layer 30 It is larger than the radius of the quantum dot at the corresponding position of the quantum dot optical film 10.

The density of quantum dots refers to the number of quantum dots per unit area.

In the embodiment of the present disclosure, the area of the quantum dot of the quantum dot enhancement layer 30 is larger than the area of the quantum dot at the corresponding position of the quantum dot optical film 10.

For ease of understanding, the "direction" in this embodiment is a related description with reference to "the non-quantum dot region of the quantum dot optical film points to the first direction of the quantum dot region". Of course, the first direction may be the same as one of the short side or the long side of the display device.

In the embodiment of the present disclosure, the quantum dot material of the quantum dot enhancement layer 30 and the quantum dot optical film 10 includes: II-IV and III-V group quantum dots, perovskite quantum dots, sulphur indium copper quantum One or a mixture of several points.

In the embodiments of the present disclosure, the quantum dot material is preferably a quantum dot with a higher temperature resistance alloy structure.

In the embodiment of the present disclosure, the quantum dots on the quantum dot optical film 10 and the quantum dot enhancement layer 30 can control their particle size or material type to emit light of different wavelengths.

For example, when the material of the quantum dot is ZnS, control the particle size of ZnS to be about 9nm to about 10nm and emit red light; control the particle size of ZnS to about 8nm and emit yellow light; control the particle size of ZnS to be about 7nm and emit Green light, however, the embodiments of the present disclosure are not limited to this. In the embodiments of the present disclosure, the material of the quantum dots and the corresponding particle size can be selected as required.

In the embodiment of the present disclosure, when the wavelength of the light emitted by the light source 20 includes 446nm-464nm, the wavelength of the light emitted by the quantum dot optical film 10 includes: 620nm-760nm and 500nm-578nm, the quantum dot The wavelength of light emitted by the enhancement layer 30 includes 530 nm to 610 nm.

In the embodiment of the present disclosure, the wavelength of the light emitted by the light source 20 includes 446 nm-464 nm, that is, the blue wavelength band. The blue light excites the quantum dots of the quantum dot optical film, so that the wavelength of the light emitted by the quantum dot optical film 10 includes: 620 nm-760 nm and 500 nm-578 nm, that is, red light and green light wavelength bands. The wavelength of the light emitted by the quantum dot enhancement layer 30 includes 530 nm-610 nm, that is, the yellow light band. After these types of light are mixed, white light is formed, or the red light emitted by the quantum dot optical film is weakened.

In the embodiment of the present disclosure, when the wavelength of the light emitted by the light source 20 includes 400nm-430nm, that is, when the emitted light is in the purple light band, the wavelength of the light emitted by the quantum dot optical film 10 includes: 620nm-760nm, 500nm-578nm, 446nm-464nm, namely red, green and blue wavelength bands. The wavelength of the light emitted by the quantum dot enhancement layer 30 includes 530 nm-610 nm, that is, the yellow light band. After these types of light are mixed, white light is formed, or the red light emitted by the quantum dot optical film is weakened.

In an embodiment of the present disclosure, referring to FIG. 6, at least one edge corner of the quantum dot enhancement layer 30 has a predetermined size region 33 without quantum dots.

In the embodiment of the present disclosure, it further includes: a backlight module functional film; the backlight module functional film includes at least one of a light guide plate, a reflective film, or a prism film. For example: the light guide plate and the quantum dot enhancement layer 20 are compositely arranged; one side of the light guide plate is provided with light guide mesh dots; the quantum dots of the quantum dot enhancement layer are arranged on the light guide plate away from the light guide mesh dots One side; or, the reflective film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged in the peripheral area of the reflective film, and the quantum dot enhancement layer is arranged on the reflective film facing the One side of the quantum dot optical film; or, the prism film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged at least in the peripheral area of the prism film, and the quantum dot enhancement layer It is arranged on the side of the prism film facing the quantum dot optical film.

In the embodiments of the present disclosure, the light guide dots are micro-convex structures arranged on the light guide plate, which are generally arranged by laser or printing, and are distributed on the entire light guide plate as required, for example, the light guide dots are evenly distributed on the light guide plate.

The quantum dots of the quantum dot enhancement layer can be directly arranged on the side of the light guide plate away from the light guide mesh dots, so that the quantum dot enhancement layer and the light guide plate are combined.

In an embodiment of the present disclosure, a display device is provided, including: a quantum dot optical film, a light source, and a quantum dot enhancement layer; the quantum dot enhancement layer is disposed between the quantum dot optical film and the light source; Wherein, the light emitted by the light source includes light in the first wavelength band; the light emitted by the quantum dot optical film includes light in the second wavelength band; the light emitted by the quantum dot enhancement layer includes light in the third wavelength band; The wavelength of the three-band light is between the wavelengths of the light in the first waveband and the light in the second waveband. In the embodiments of the present disclosure, a quantum dot enhancement layer is added between the quantum dot optical film and the light source, and the light mixing effect of the quantum dot enhancement layer is adopted to prevent the edge of the display device from emitting colored light, thereby improving the display quality of the display device.

In the embodiments of the present disclosure, for example, the light source is an edge light source for description, the quantum dot optical film is a quantum dot backlight module optical film, and the quantum dot optical film is located between the light source and the display panel. The quantum dot enhancement layer can be composited with the functional film in the backlight module, for example, composited with one of the light guide plate, the reflective film or the prism film.

In an embodiment of the present disclosure, referring to FIG. 1, a display device according to an embodiment of the present disclosure is shown, including: a quantum dot optical film 10, a light source 20, and a quantum dot enhancement layer 30;

In the embodiment of the present disclosure, the size of the quantum dots of the enhanced region is about 0.5 mm to about 5 mm.

In the embodiment of the present disclosure, referring to FIG. 7, when the light source 20 is an edge-type light source, the enhanced area 31 is at least arranged on a side close to the light source 20.

At least part of the quantum dots 311 of the quantum dot enhancement layer 30 gradually decrease in size along the second direction. For example, the direction in which the light source points away from the light source is the second direction (for example, the X direction).

In the embodiment of the present disclosure, referring to FIG. 7, the sizes of at least part of the quantum dots 311 of the enhanced region are staggered in the first direction (for example, the Y direction).

For example, the second direction (such as X) is perpendicular to the first direction (such as Y).

For example, the size of the quantum dots 311 in the enhanced region is gradually reduced or arranged in a staggered manner in the third direction (for example, the Z direction). The third direction (for example, the Z direction) forms a certain angle with the first direction Y. For example, the angle is about 10 degrees to about 60 degrees.

In the embodiments of the present disclosure, the first direction and the second direction are opposite and can be interchanged. It is understandable that the second direction in which the light source points away from the light source in this embodiment may be the same as the first direction in which the edge area points to the quantum dot area in the first embodiment, or it may be Is different.

The quantum dots of the enhanced region 31 are arranged on both sides of the enhanced region close to the light source, and/or the density of the quantum dots on both sides of the enhanced region is less than the density in the middle. The positions of the two sides of the enhanced area correspond to the positions of the two sides of the light source.

For example: the enhanced region is in the first direction, that is, the Y direction, and the density of quantum dots on both sides of the enhanced region is smaller than the density in the middle.

In the embodiment of the present disclosure, for example, the enhanced region 31 is an axisymmetric figure (for example, symmetric about the X axis).

In the embodiments of the present disclosure, the density of quantum dots refers to the number of quantum dots per unit area.

In the embodiment of the present disclosure, the quantum dot optical film 10 and the quantum dots on the quantum dot enhancement layer 30 can emit light of different wavelengths according to their particle size or material type.

In the embodiment of the present disclosure, when the wavelength of the light emitted by the light source 20 includes 446nm-464nm, the wavelength of the light emitted by the quantum dot optical film 10 includes 620nm-760nm and 500nm-578nm, and the quantum dots enhance The wavelength of light emitted by the layer 30 includes 530 nm to 610 nm.

In the embodiment of the present disclosure, when the wavelength of the light emitted by the light source 20 includes 400nm-430nm, the wavelength of the light emitted by the quantum dot optical film 10 includes 620nm-760nm, 500nm-578nm, and 446nm-464nm. The wavelength of light emitted by the quantum dot enhancement layer 30 includes 530 nm-610 nm.

In the embodiment of the present disclosure, for example, as shown in FIG. 6, the area 33 of the predetermined size of at least one edge corner of the quantum dot enhancement layer 30 may not be provided with quantum dots.

In the embodiment of the present disclosure, the area of the predetermined size includes: an arc with a radius of about 1 cm to about 5 cm with the intersection of the edge corners as the center. Since there is no light source in this area, it is difficult to obtain green light by mixing yellow light quantum dots, and it is difficult to improve the stray light; in addition, this part can be used for the fixing structure of the optical film for installation.

In an embodiment of the present disclosure, the display device further includes: a backlight module functional film. The backlight module functional film includes at least one of a light guide plate, a reflective film, or a prism film. For example: the light guide plate and the quantum dot enhancement layer 30 are compositely arranged; one side of the light guide plate is provided with light guide mesh dots; the quantum dots of the quantum dot enhancement layer are arranged on the light guide plate away from the light guide mesh dots One side; or, the reflective film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged in the peripheral area of the reflective film, and the quantum dot enhancement layer is arranged on the reflective film facing the One side of the quantum dot optical film; or, the prism film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged at least in the peripheral area of the prism film, and the quantum dot enhancement layer It is arranged on the side of the prism film facing the quantum dot optical film.

In the embodiment of the present disclosure, the light guide dots are micro-convex structures arranged on the light guide plate, for example, can be set by laser or printing, for example: the light guide plate evenly distributes the light guide dots, but the embodiment of the present disclosure is not limited to this.

For example, the quantum dots of the quantum dot enhancement layer can be directly arranged on the side of the light guide plate away from the light guide mesh dots, so that the quantum dot enhancement layer and the light guide plate are combined.

In an embodiment of the present disclosure, a display device is provided, including: a quantum dot optical film, a light source, and a quantum dot enhancement layer; the quantum dot enhancement layer is disposed between the quantum dot optical film and the light source. The light emitted by the light source includes light in the first waveband; the light emitted by the quantum dot optical film includes light in the second waveband; the light emitted by the quantum dot enhancement layer includes light in the third waveband; the third waveband The wavelength of the light is between the wavelengths of the light in the first wavelength band and the light in the second wavelength band. In the embodiments of the present disclosure, a quantum dot enhancement layer is added between the quantum dot optical film and the light source, and the light mixing effect of the quantum dot enhancement layer is adopted to prevent the edge of the display device from emitting colored light, thereby improving the display quality of the display device.

It should be understood that the display device of the present application may also include other structures. For clarity and clarity, the description of these structures is omitted in the present disclosure, and related content can be referred to related technologies.

The following points need to be explained:

(1) The drawings of the embodiments of the present disclosure only refer to the structures related to the embodiments of the present disclosure, and other structures can refer to the usual design.

(2) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments, and these new embodiments should all belong to the scope of the present disclosure.

The above are only exemplary embodiments of the present disclosure, and the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed in the embodiments of the present disclosure. All replacements shall be covered within the protection scope of the present disclosure.

Claims

A display device, comprising: a quantum dot optical film, a light source, and a quantum dot enhancement layer;

The quantum dot enhancement layer is arranged between the quantum dot optical film and the light source;

Wherein, the light emitted by the light source includes light in the first wavelength band; the light emitted by the quantum dot optical film includes light in the second wavelength band; the light emitted by the quantum dot enhancement layer includes light in the third wavelength band; The wavelength of the three-band light is between the wavelengths of the light in the first waveband and the light in the second waveband.
The display device according to claim 1, wherein the quantum dot optical film comprises a quantum dot region and a non-quantum dot region, the non-quantum dot region is disposed at the periphery of the quantum dot region; and the quantum dot enhancement The layer is provided with an enhanced region at least at a position corresponding to the edge region of the non-quantum dot region.
3. The display device of claim 2, wherein the distance between the enhanced region and the quantum dot region in a direction parallel to the quantum dot optical film is about 0.1 μm to about 5 mm.
The display device according to any one of claims 1 to 3, wherein the quantum dot optical film comprises a quantum dot color film, between the light source and the quantum dot enhancement layer, or between the quantum dot enhancement layer and A composite optical film is also arranged between the quantum dot optical films.
The display device according to any one of claims 1 to 4, wherein the density of the quantum dots of at least part of the quantum dot enhancement layer sequentially increases from the non-quantum dot area toward the quantum dot area in the first direction And/or; the size of the quantum dots of the quantum dot enhancement layer sequentially decreases along the first direction.
The display device according to any one of claims 1 to 5, wherein the density of quantum dots of at least part of the quantum dot enhancement layer is greater than the density of quantum dots in the corresponding position of the quantum dot optical film; and/or the quantum dots The radius of the quantum dot of the dot enhancement layer is larger than the radius of the quantum dot at the corresponding position of the quantum dot optical film; and/or the area of the quantum dot of the quantum dot enhancement layer is larger than the area of the quantum dot at the corresponding position of the quantum dot optical film.
The display device according to any one of claims 1-6, further comprising: a backlight module functional film; the backlight module functional film comprises: at least one of a light guide plate, a reflective film, or a prism film; wherein the guide The light plate and the quantum dot enhancement layer are combinedly arranged; one side of the light guide plate is provided with light guide mesh dots; the quantum dots of the quantum dot enhancement layer are arranged on the side of the light guide plate away from the light guide mesh dots; or, the The reflective film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged at least in the peripheral area of the reflective film, and the quantum dot enhancement layer is arranged on the reflective film facing the quantum dot optical film Or, the prism film and the quantum dot enhancement layer are compositely arranged, the quantum dot enhancement layer is arranged at least in the peripheral area of the prism film, and the quantum dot enhancement layer is arranged on the prism The film faces one side of the quantum dot optical film.
7. The display device according to any one of claims 2-7, wherein the enhanced area is at least arranged on a side close to the light source.
8. The display device of claim 8, wherein the size of the quantum dots of the quantum dot enhancement layer gradually decreases in the second direction.
5. The display device of claim 5, wherein the size of the quantum dots of the enhancement region are staggered in a direction perpendicular to the first direction.
9. The display device according to claim 9, wherein the quantum dots of the enhanced region are arranged on both sides of the enhanced region, and the density of the quantum dots on both sides of the enhanced region is less than the density in the middle; wherein The two sides of the area correspond to the positions of the two sides of the light source.
The display device according to any one of claims 1 to 11, wherein when the wavelength of the light emitted by the light source includes 446nm-464nm, the wavelength of the light emitted by the quantum dot optical film includes: 620nm-760nm and 500nm -578nm; when the wavelength of light emitted by the light source includes: 400nm-430nm, the wavelength of light emitted by the quantum dot optical film includes: 620nm-760nm, 500nm-578nm, 446nm-464nm; wherein the quantum dots are enhanced The wavelength of light emitted by the layer includes 530nm-610nm.
11. The display device according to any one of claims 1 to 11, wherein the quantum dots are not provided in an area with a predetermined size of at least one edge angle of the quantum dot enhancement layer.
4. The display device according to any one of claims 1 to 4, wherein the size of at least part of the quantum dots in the enhanced region is gradually reduced or arranged in a staggered manner in a third direction, and the third direction is aligned with the second direction The direction that forms a certain angle.
The display device of claim 14, wherein the angle is about 10 degrees to about 60 degrees.