CN111524452A

CN111524452A - Display device

Info

Publication number: CN111524452A
Application number: CN202010367312.1A
Authority: CN
Inventors: 郑天春; 郑义; 王彦青; 曾军辉
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-11
Anticipated expiration: 2040-04-30
Also published as: CN111524452B

Abstract

The invention relates to a display device, wherein a display screen is provided with a first side and a second side which are oppositely arranged along a first direction; and a composite layer set comprising: the light absorption layer is arranged on the second side of the display screen, and a first mounting hole penetrates through the light absorption layer along a first direction; the optical auxiliary layer comprises a light inlet side and a light outlet side which are oppositely arranged along a first direction, the light inlet side is arranged towards the display screen, and the light outlet side is arranged towards the light absorbing layer; the optical auxiliary layer allows light to be transmitted to the light emergent side through the light incident side and reflected back and forth between the light incident side and the light absorption layer. Light can be reflected back and forth between the light incidence side of the optical auxiliary layer and the light absorption layer, so that the light absorption layer is provided with the first mounting hole in the area which is equivalent to the absorbed light quantity in the area which is not provided with the first mounting hole, and finally, the difference of the light quantity returning to each area of the display screen is smaller, and the Mura visibility is weakened.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

With the progress of science and technology and the continuous development of the information era, the requirements of people on various performances of display screens are gradually improved. The brightness uniformity of the display screen during displaying is particularly important. When the display screen is displaying, the display screen often has a problem of local brightness unevenness on the display screen, that is, the display screen is prone to have Mura (Mura refers to a phenomenon that the brightness of the display screen is uneven, causing various traces, such as occurrence of dark spots).

Disclosure of Invention

Accordingly, there is a need for a display device that can improve the above problems.

According to an aspect of the present invention, there is provided a display device including:

the display screen is provided with a first side and a second side which are oppositely arranged along a first direction; and

a composite layer set comprising:

the light absorption layer is arranged on the second side of the display screen, and a first mounting hole penetrates through the light absorption layer along a first direction;

the optical auxiliary layer comprises a light inlet side and a light outlet side which are oppositely arranged along a first direction, the light inlet side is arranged towards the display screen, and the light outlet side is arranged towards the light absorbing layer;

the optical auxiliary layer allows light to be transmitted to the light emergent side through the light incident side and reflected back and forth between the light incident side and the light absorption layer.

In one embodiment, the optical assist layer is a metal optical assist layer.

In one embodiment, the optical auxiliary layer is a nanoscale metal layer;

preferably, the metal used in the nanoscale metal layer comprises one or more of aluminum, silver and nickel.

In an embodiment, the composite layer set further comprises a scattering layer;

the scattering layer is arranged between the optical auxiliary layer and the display screen.

In an embodiment, the scattering layer comprises scattering particles.

In one embodiment, the scattering particles are one or more of silicone particles, polyethylene particles, acrylic resin particles, nano barium sulfate particles, silica particles, and calcium carbonate particles.

In an embodiment, the composite layer set further includes a base, the optical auxiliary layer is disposed on a side of the base facing the light absorbing layer, and the scattering layer is disposed on a side of the base facing away from the light absorbing layer.

In one embodiment, the supporting film further includes a reflective layer disposed between the optical auxiliary layer and the display screen;

wherein a light transmittance of the reflective layer from a side facing the display screen to a side facing the light absorbing layer is 60% or more.

In an embodiment, the composite layer set further comprises a scattering layer;

wherein the reflecting layer is arranged between the optical auxiliary layer and the scattering layer.

According to another aspect of the present invention, there is provided a display device including:

the display screen is provided with a first side and a second side which are oppositely arranged along a first direction;

the supporting film layer is arranged on the second side of the display screen; and

the composite adhesive tape is arranged on one side, away from the display screen, of the supporting film layer; the composite tape comprises:

the light absorption layer is provided with a first mounting hole in a penetrating manner along a first direction;

wherein, support the rete and include the optics auxiliary layer, the optics auxiliary layer includes along the relative income light side and the light-emitting side that sets up of first direction, the income light side to the display screen sets up, the light-emitting side to the light absorption layer sets up, the optics auxiliary layer allows the light to pass through the income light side transmits extremely the light-emitting side, and go into the light side with reciprocal reflection between the light absorption layer.

According to the display device, light emitted by the display screen or light entering the display screen from the light inlet side of the optical auxiliary layer penetrates to the light outlet side of the optical auxiliary layer, the light can be reflected back and forth between the light inlet side of the optical auxiliary layer and the light absorption layer, so that the absorbed light quantity of the area (corresponding to the opening area of the composite adhesive tape) provided with the first mounting hole on the light absorption layer is equivalent to the absorbed light quantity of the area (corresponding to the non-opening area of the composite adhesive tape) not provided with the first mounting hole, and finally, the difference of the returned light quantity of each area of the display screen is smaller, so that the Mura visibility is weakened.

Drawings

FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a display device according to another embodiment of the present application;

fig. 3 is a schematic cross-sectional view of a display device according to another embodiment of the present application.

100. A display device; 10. a display screen; 11. a first side; 12. a second side; 20. a support film layer; 21. a substrate; 22. an optical auxiliary layer; 23. a scattering layer; 24. a reflective layer; 30. compounding adhesive tape; 31. mounting holes; 32. a light absorbing layer; 321. a first mounting hole; 33. a heat dissipation layer; 331. and a second mounting hole.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

One or more embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which elements such as shapes, sizes, proportions, angles, and numbers of elements are merely examples, and in different embodiments, the same or corresponding elements may be denoted by the same reference numerals, and repeated descriptions thereof will be omitted.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In describing positional relationships, when an element such as a layer, film or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present, unless otherwise specified. Further, when a layer is referred to as being "under" another layer, it can be directly under, or one or more intervening layers may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

As described in the background art, when a display screen displays, Mura (uneven brightness) is likely to appear on a display screen, which results in poor experience of a display device.

The inventors of the present application have found that the reason why the above problems occur is that: with the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry. In order to achieve the effect of comprehensive screen display, the technology of fingerprint under the screen is developed, and the technology is a new technology which completes the process of fingerprint identification and unlocking by placing a fingerprint identification sensor under the screen. In order to facilitate the assembly of the fingerprint identification sensor, a mounting hole needs to be opened in a composite adhesive tape below the screen (the composite adhesive tape is mainly used for dissipating heat of the display screen, shielding electromagnetic waves, buffering external acting force and preventing light leakage of the display device) so as to assemble the optical fingerprint identification sensor in the mounting hole.

The composite tape is provided with a light absorbing layer so as to absorb light entering from the display screen side (including self-light emission of the display screen and external incident light), thereby preventing the display device from leaking light to the outside. The composite adhesive tape is provided with the mounting hole (the composite adhesive tape can be divided into a hole area and a non-hole area), so that light entering from the side of the display screen can be absorbed by the light absorbing layer when entering the non-hole area of the composite adhesive tape, and the light entering from the side of the display screen is reflected back to the display screen to be emitted because the light absorbing layer is also provided with holes when entering the hole area of the composite adhesive tape. Therefore, the difference exists between the light reflected by the area of the display screen, which is over against the perforated area of the composite adhesive tape, and the light reflected by the area of the display screen, which is over against the non-perforated area of the composite adhesive tape, so that the phenomenon of uneven brightness of the display screen occurs when the display screen displays pictures.

To solve the above problems, the present application provides a display device, which can preferably solve the above problems.

FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present application

Referring to fig. 1, the display device 100 in an embodiment of the present application may be applied to the fields of a mobile phone terminal, bionic electronics, electronic skin, wearable equipment, vehicle-mounted equipment, internet of things equipment, artificial intelligence equipment, and the like. For example, the display device 100 may be a digital device such as a mobile phone, a tablet, a palm computer, an ipod, and a smart watch.

The display device 100 includes a display screen 10, and the display screen 10 has a first side 11 and a second side 12 opposite to each other in a first direction, referring to fig. 1, where the first direction is an up-down direction in fig. 1, that is, a thickness direction of the display device 100. The display screen 10 includes a flexible display panel (not shown), which may be a flexible organic light emitting display panel, specifically, a flexible OLED light emitting display panel, or other flexible and bendable panels, such as a Micro LED flexible display panel, a quantum dot flexible display panel, and the like, without limitation.

The display screen 10 further comprises a cover plate (not shown), a side of the cover plate facing away from the flexible display panel forming a first side 11 of the display screen 10 and a side of the flexible display panel facing away from the cover plate forming a second side 12 of the display screen 10.

The cover plate has a first region (not shown) and a second region (not shown) located at least on one side of the first region and adjacent to the first region. For example, in some embodiments, the first region may be a flat region, and the second region may be a curved region (arc groove region), and the second region smoothly transitions with the first region, thereby achieving a curved display effect.

The cover plate and the flexible display panel may be adhered by an OCA adhesive layer or a TPU adhesive layer, or may be attached by static electricity, which is not limited herein. In some embodiments, the display screen 10 further includes a polarizer, and the polarizer is disposed between the flexible display panel and the cover plate. In other words, the cover plate may be formed after the polarizer is attached to the light-emitting surface of the flexible display panel.

Specifically, the cover plate is a rigid cover plate made of glass, and more specifically, made of tempered glass, which is also called tempered glass and is glass with a compressive stress on the surface, that is, the cover plate is made of glass reinforced by a tempering method.

The display device 100 further includes a composite layer set disposed on the second side 12 of the display screen 10 to dissipate heat of the display screen 10, electromagnetically shield the display screen, buffer external force, and prevent light leakage of the display device 100.

The composite layer set comprises a support film layer 20 and a composite adhesive tape 30, wherein the support film layer 20 mainly plays a role in supporting the display screen 10 and buffering external action, and the composite adhesive tape 30 mainly plays a role in light absorption, heat dissipation, electromagnetic shielding and the like.

In one embodiment, the composite tape 30 has a mounting hole 31 formed therethrough in the first direction, the mounting hole 31 is used for assembling an optical fingerprint sensor, when a user places a finger on the display screen 10, the optical fingerprint sensor collects a fingerprint image according to the principle of specular reflection, the fingerprint image is converted into a digital signal by a digital signal processor, and then the digital signal is matched with a fingerprint in a fingerprint library by a microcontroller, thereby completing identification. The area of the composite tape 30 with the mounting hole 31 is defined as an open area, and the area without the mounting hole 31 is defined as a non-open area.

Specifically, the mounting hole 31 is disposed opposite to the first region of the cover plate, so that the optical fingerprint recognition sensor is disposed opposite to the first region of the cover plate, thereby enabling the display device 100 to implement a fingerprint unlocking function in the flat region of the cover plate. It is contemplated that in other embodiments, the mounting hole 31 may be disposed opposite to the second region of the cover plate, such that the optical fingerprint sensor is disposed opposite to the second region of the cover plate, thereby enabling the display device 100 to perform the fingerprint unlocking function at the bending region of the cover plate.

The composite tape 30 includes a light absorbing layer 32, and a first mounting hole 321 is formed through the light absorbing layer 32 in a first direction. It should be noted that, when the composite tape 30 includes only the light absorbing layer 32, the first mounting hole 321 is the mounting hole 31 of the composite tape 30. The first mounting hole 321 here is a part of the mounting hole 31 of the composite tape 30 when the composite tape 30 further includes other layer structures. When light emitted by the display screen 10 or light entering the display screen 10 from the outside enters the light absorbing layer 32 of the composite tape 30 from the display screen 10, the light absorbing layer 32 is not provided with the first mounting hole 321, and the light is absorbed by the portion of the light absorbing layer 32 which is not provided with the first mounting hole 321, and the light is reflected back to the display screen 10 by the optical fingerprint identification sensor which is assembled in the first mounting hole 321 when entering the first mounting hole 321, so that when the display screen 10 displays, a display picture appears Mura.

In one embodiment, the light absorbing layer 32 is made of black foam, the foam is made of plastic particles, and the foam has elasticity and can absorb light and play a certain buffering role when the display screen 10 is subjected to an external force. It is understood that in other embodiments, the light absorbing layer 32 may be made of other materials, such as light absorbing layer 32 made of dark ink. That is, the light absorbing layer 32 may be made of any material that can achieve a certain light absorbing effect and does not interfere with the normal operation of the display device 100, and the kind of the material used for the light absorbing layer 32 is not limited.

The composite tape 30 further includes a heat dissipation layer 33, and the heat dissipation layer 33 is disposed on a side of the light absorbing layer 32 facing away from the display screen 10 for dissipating heat from the display device 100. Specifically, the heat dissipation layer 33 is a copper foil layer. It should be understood that, in other embodiments, the heat dissipation layer 33 may be made of other materials, which is not limited herein.

Specifically, the heat dissipation layer 33 is provided with a second mounting hole 331 in the first direction, the second mounting hole 331 is correspondingly communicated with the first mounting hole 321 of the light absorption layer 22, and the first mounting hole 321 and the second mounting hole 321 jointly serve as the mounting hole 31 of the composite tape 30.

In another embodiment, the composite film layer further includes an adhesive layer (not shown) for bonding between the layers in the composite film layer, such as double-sided tape, liquid adhesive, and the like.

The composite layer group includes an optical auxiliary layer 22, the optical auxiliary layer 22 includes a light incident side and a light exit side which are oppositely disposed along a first direction, the light incident side is disposed toward the display screen 10, the light exit side is disposed toward the light absorbing layer 32, and the optical auxiliary layer 22 allows light to be transmitted from the light incident side to the light exit side and to be reflected back and forth between the light incident side and the light absorbing layer 32 (a dotted arrow in fig. 1 indicates a direction of light). In particular, the support film layer 20 includes the optical assist layer 22 described above. In this way, light emitted from the display screen 10 or light entering the display screen 10 from the light incident side of the optical auxiliary layer 22 is transmitted to the light emitting side thereof, and since the light can be reflected back and forth between the light incident side of the optical auxiliary layer 22 and the light absorbing layer 32, the absorbed light quantity in the area (corresponding to the perforated area of the composite tape 30) where the first mounting hole 321 is formed in the light absorbing layer 32 is equivalent to the absorbed light quantity in the area (corresponding to the non-perforated area of the composite tape 30) where the first mounting hole 321 is not formed, and finally, the difference of the returned light quantity in each area of the display screen 10 is small, so as to weaken the Mura visibility.

Here, the light is reflected back and forth between the light incident side and the light absorbing layer 32, which means: the light transmitted to the light exit side is reflected back and forth in the range between the light entrance side and the light absorbing layer 32.

It is understood that in the above embodiments, the optical assist layer 22 is included as part of the support film layer 20, and it is understood that in other embodiments, the optical assist layer 22 may be present independently of the support film layer 20.

Further, the supporting film layer 20 further includes a substrate 21, the optical auxiliary layer 22 is disposed on the substrate 21, and the substrate 21 may be made of PET (Polyethylene terephthalate is the most important kind of thermoplastic polyester in PET, and is abbreviated as PET or PEIT (hereinafter, referred to as PET), which is commonly referred to as polyester resin, and is a condensation product of terephthalic acid and ethylene glycol, and is collectively referred to as thermoplastic polyester together with PBT, or saturated polyester).

Specifically, the optical auxiliary layer 22 is disposed on a side of the base 21 away from the display screen 10, which is more convenient to dispose than the optical auxiliary layer 22 is disposed on a side of the base 21 facing the display screen 10. It should be understood that in other embodiments, the optical auxiliary layer 22 may also be disposed on the side of the substrate 21 facing the display screen 10, and is not limited herein.

In one embodiment, the optical assist layer 22 is a metal optical assist layer. In particular, the optical auxiliary layer 22 is a nanoscale metal layer to ensure that the optical auxiliary layer 22 has a high reflectivity. More specifically, the metal used in the nanoscale metal layer includes one or more of aluminum, silver, and nickel. In one embodiment, the optical assist layer 22 is formed using aluminum. In a second embodiment, the optical assist layer 22 is formed using silver. In a third embodiment, the optical assist layer 22 is formed using nickel. In the fourth embodiment, the optical auxiliary layer 22 is formed using any two combinations of aluminum, silver, and nickel. In the fifth embodiment, the optical auxiliary layer 22 is formed by combining three metals, i.e., aluminum, silver and nickel.

Further, the nano-scale metal layer is formed on the surface of the substrate 21 by vacuum magnetron sputtering.

In other embodiments, the optical auxiliary layer 22 may also be a film structure, that is, the optical auxiliary layer 22 may not be a metal optical auxiliary layer 22, but may be formed by plating a film on the substrate 21. Specifically, the film structure may be formed on the surface of the substrate 21 by vacuum deposition.

In the above embodiment, although the optical auxiliary layer 22 is provided, after the optical auxiliary layer 22 and the light absorbing layer 32 are reflected back and forth, a part of the light is transmitted through the optical auxiliary layer 22 and is again emitted to the display screen 10. That is, even though the optical auxiliary layer 22 is provided, a part of the light is returned to the display screen 10 through the optical auxiliary layer 22, and the amount of the light returned to the display screen 10 through the optical auxiliary layer 22 is still different due to the installation holes 31 in the composite tape 30 (the light in the perforated area of the display screen 10 facing the composite tape 30 is different from the light in the non-perforated area).

Fig. 2 shows a schematic cross-sectional view of a display device in another embodiment of the present application.

Referring to fig. 2, in an embodiment, in order to improve the above problem, the composite layer set further includes a scattering layer 23, and the scattering layer 23 is disposed between the optical auxiliary layer 22 and the display screen 10. Specifically, the support film layer 20 includes the scattering layer 23 described above. Thus, the light transmitted through the optical auxiliary layer 22 deviates from the original propagation path (the dashed arrow in fig. 2 also indicates the direction of the light) when passing through the scattering layer 23, that is, the light facing the non-perforated area of the composite tape 30 and the light facing the perforated area of the composite tape 30 both deviate from the original propagation path after passing through the scattering layer 23, and the light facing the non-perforated area of the composite tape 30 and the light facing the perforated area of the composite tape 30 interfere with each other after passing through the scattering layer 23, so that the light quantity reflected by the non-perforated area of the composite tape 30 and the light quantity reflected by the non-perforated area of the composite tape 30 on the display screen 10 are more similar, and the difference between the light quantity reflected by the area of the light absorbing layer 32 provided with the first mounting hole 321 back to the display screen 10 and the difference between the light quantity reflected by the area of the light absorbing layer 32 without the first mounting hole 321 back to the display screen 10 are.

It should be noted that, in the above embodiments, the scattering layer 23 is a part of the supporting film layer 20, and it is understood that, in other embodiments, the scattering layer 23 may exist independently of the supporting film layer 20.

In one embodiment, the optical auxiliary layer 22 is disposed on a side of the substrate 21 facing the light absorbing layer 32, and the scattering layer 23 is disposed on a side of the substrate 21 facing the display screen 10. It will be appreciated that in other embodiments, both the optical auxiliary layer 22 and the scattering layer 23 are disposed on the side of the substrate 21 facing the display screen 10. In other embodiments, the optical auxiliary layer 22 and the scattering layer 23 are disposed on the side of the substrate 21 facing the light absorbing layer 32, and are not limited herein.

Specifically, the scattering layer 23 is a scattering particle layer. The scattering particles are one or more of organic silicon, polyethylene, acrylic resin, nano barium sulfate, silicon dioxide and calcium carbonate. It is understood that the scattering particles can be made of other materials besides the above listed materials, and will not be described herein.

Fig. 3 shows a schematic cross-sectional view of a display device in a further embodiment of the present application.

Referring to fig. 3, in one embodiment, the composite layer further includes a reflective layer 24, and the reflective layer 24 is disposed between the optical auxiliary layer 22 and the display screen 10. Specifically, the support film layer 20 includes the above-described reflective layer 24. In this way, when light emitted from the display screen 10 or light entering the display screen 10 from the outside enters the optical auxiliary layer 22 from the display screen 10 and passes through the optical auxiliary layer 22, the light first enters the reflective layer 24 and is reflected by the reflective layer 24 back to the display screen 10 (the dashed arrow in fig. 3 also indicates the light direction). That is, due to the presence of the reflective layer 24, the reflective layer 24 may reflect a portion of the light toward the display screen 10, and the portion of the light reflected by the reflective layer 24 toward the display screen 10 does not interact with the light absorbing layer 32, so that the portion of the light is uniformly distributed throughout the display screen 10. The remaining light transmitted through the reflective layer 24 is transmitted through the optical auxiliary layer 22, then reflected back and forth between the optical auxiliary layer 22 and the light absorbing layer 32, and some of the light passes through the optical auxiliary layer 22 and the reflective layer 24 and is reflected back to the display screen 10. The reduction in the difference in the amount of light throughout the display screen 10 can be further reduced by the combination of the reflective layer 24 and the optical auxiliary layer 22, thereby further reducing the Mura visibility.

It should be noted that, in order to ensure the normal operation of the optical fingerprint sensor, the light transmittance of the reflective layer 24 from the side facing the display screen 10 to the side facing the light absorbing layer 32 is set to be 60% or more.

It should be noted that, in the above embodiments, the reflective layer 24 is a part of the supporting film 20, and it is understood that, in other embodiments, the reflective layer 24 may exist independently of the supporting film 20.

Specifically, the substrate 21 may be directly formed with the reflective layer 24, that is, the haze of the substrate 21 is changed to make the substrate 21 reflect part of the light, for example, the substrate 21 is made transparent gray. It is understood that, in other embodiments, the reflective layer 24 may also be a layer structure formed on the substrate 21 by printing or coating and disposed independently of the substrate 21, and is not limited herein.

More specifically, the thicknesses of the optical auxiliary layer 22, the scattering layer 23, and the reflection layer 24 are all within several tens of um. If the thickness of the optical auxiliary layer 22 is less than or equal to 50um, the thickness of the scattering layer 23 is 30um-50um, and the thickness of the reflection layer 24 is less than or equal to 10 um.

Further, a reflective layer 24 is provided between the optical auxiliary layer 22 and the scattering layer 23. In this way, when light emitted from the display panel 10 or light entering the display panel 10 from the outside enters the optical auxiliary layer 22 from the display panel 10 and passes through the optical auxiliary layer 22, the light first enters the reflective layer 24 and is reflected by the reflective layer 24 back to the scattering layer 23. The remaining light transmitted through the reflective layer 24 is transmitted through the optical auxiliary layer 22, then reflected back and forth between the optical auxiliary layer 22 and the light absorbing layer 32, and part of the light passes through the optical auxiliary layer 22 and the reflective layer 24 and is reflected back to the scattering layer 23. Finally, all light is scattered by the scattering layer 23 and then emitted from the display screen 10.

By the combination of the reflective layer 24, the optical auxiliary layer 22 and the scattering layer 23, the reduction of the difference in the amount of light throughout the display screen 10 can be further reduced, thereby further reducing the Mura visibility.

In one embodiment, the optical assist layer 22 is disposed on a side of the substrate 21 facing the light absorbing layer 32, and the reflective layer 24 and the scattering layer 23 are both disposed on a side of the substrate 21 facing away from the light absorbing layer 32. In another embodiment, the optical assist layer 22 and the reflective layer 24 are disposed on a side of the substrate 21 facing the light absorbing layer 32, and the scattering layer 23 is disposed on a side of the substrate 21 facing away from the light absorbing layer 32. In yet another embodiment, the optical assist layer 22, the scattering layer 23, and the reflective layer 24 are all located on a side of the substrate 21 facing away from the light absorbing layer 32.

It should be noted that when an element such as a layer, film or substrate is referred to as being "on" another layer, it can be directly on the other layer or intervening layers may also be present, unless otherwise specified, in describing the positional relationship. Further, when a layer is referred to as being "under" another layer, it can be directly under, or one or more intervening layers may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display device, comprising:

a composite layer set comprising:

2. The display device of claim 1, wherein the optical assist layer is a metallic optical assist layer.

3. The display device of claim 2, wherein the optical assist layer is a nanoscale metal layer;

4. The display device of claim 1, wherein the composite layer set further comprises a scattering layer;

5. The display device according to claim 4, wherein the scattering layer comprises scattering particles.

6. The display device according to claim 5, wherein the scattering particles are one or more of silicone particles, polyethylene particles, acrylic resin particles, nano barium sulfate particles, silica particles, and calcium carbonate particles.

7. The display device according to any one of claims 4 to 6, wherein the composite layer set further comprises a base, the optical auxiliary layer is provided on a side of the base facing the light absorbing layer, and the scattering layer is provided on a side of the base facing away from the light absorbing layer.

8. The display device of claim 1, wherein the support film layer further comprises a reflective layer disposed between the optical auxiliary layer and the display screen;

9. The display device of claim 8, wherein the composite layer set further comprises a scattering layer;

10. A display device, comprising: