CN116322147A - Display panel and display device - Google Patents

Abstract

The application provides a display panel and a display device, wherein the display panel comprises a display functional layer and a reflection reducing functional layer; the display function layer includes a light emitting element; the anti-reflection function layer is arranged on one side, close to the light-emitting surface of the display panel, of the display function layer along the thickness direction, the anti-reflection function layer comprises a first sub-layer and a second sub-layer which are stacked along the thickness direction, the first sub-layer is at least partially embedded into the second sub-layer, refractive indexes of the first sub-layer and the second sub-layer are different, a section, parallel to the light-emitting surface, of the anti-reflection function layer at least partially comprises a first section corresponding to the first sub-layer and a second section corresponding to the second sub-layer, and the ratio of the area occupied by the first section to the area occupied by the second section in the sections is changed along the thickness direction. The refractive index of at least part of the anti-reflection function layer is in a changing state along the thickness direction, so that when ambient light enters the anti-reflection function layer, the reflectivity of the ambient light is reduced because no optical interface with large refractive index difference exists.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display panel manufacturing technologies, and in particular, to a display panel and a display device.

Background

The organic light emitting display panel (Organic Light Emitting Diode, abbreviated as OLED) has various characteristics of self-luminescence, fast response, wide viewing angle, and being fabricated on a flexible substrate, and is increasingly applied to the field of high performance display.

In the related art, after the ambient light outside the display panel is incident into the display panel, the ambient light irradiates the related film layer, and total reflection occurs in the related film layer, and then the ambient light irradiates back to the environment, so that the reflection of the ambient light by the display panel is easy to cause a certain interference to the normal display of the display panel.

Disclosure of Invention

The application provides a display panel and a display device, so as to reduce interference of reflection of the display panel to ambient light on normal display of the display panel.

In a first aspect, a display panel provided according to an embodiment of the present application includes a display functional layer and a reflection reducing functional layer; the display function layer includes a light emitting element; the anti-reflection function layer is arranged on one side, close to the light-emitting surface of the display panel, of the display function layer along the thickness direction, the anti-reflection function layer comprises a first sub-layer and a second sub-layer which are stacked along the thickness direction, the first sub-layer is at least partially embedded into the second sub-layer, refractive indexes of the first sub-layer and the second sub-layer are different, a section, parallel to the light-emitting surface, of the anti-reflection function layer at least partially comprises a first section corresponding to the first sub-layer and a second section corresponding to the second sub-layer, and the ratio of the area occupied by the first section to the area occupied by the second section in the sections is changed along the thickness direction.

In some embodiments, the ratio of the area occupied by the first section to the area occupied by the second section in the sections varies continuously in the thickness direction.

In some embodiments, the ratio of the area occupied by the first section to the area occupied by the second section in the section gradually decreases along the direction approaching the light-emitting surface.

In some embodiments, the protrusions taper in cross-section perpendicular to the thickness direction from the first sub-layer to the second sub-layer.

In some embodiments, the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer.

In some embodiments, the refractive index n1 of the first sub-layer and the refractive index n2 of the second sub-layer satisfy: n1-n2 is more than or equal to 0.1.

In some embodiments, 1.7.ltoreq.n1.ltoreq.2.2.

In some embodiments, 1.2.ltoreq.n2.ltoreq.1.7.

In some embodiments, the thickness of the anti-reflection functional layer does not exceed 5um.

In some embodiments, the first sub-layer includes a plurality of protrusions and the second sub-layer includes a plurality of grooves, the protrusions and grooves cooperating.

In some embodiments, the protrusions taper in cross-section perpendicular to the thickness direction from the first sub-layer to the second sub-layer.

In some embodiments of the present invention, in some embodiments, the bulge is cone-shaped, round table-shaped with small upper part and large lower part, square cone-shaped, semi-ellipsoidal with small upper part and large lower part or pyramid-shaped.

In some embodiments, the spacing w of two adjacent protrusions in a direction perpendicular to the thickness direction satisfies: w is more than or equal to 100nm and less than or equal to 2000nm.

In some embodiments, in the thickness direction, the dimension h of the protrusion satisfies: h is more than or equal to 200nm and less than or equal to 3000nm.

In some embodiments, the material of the first sub-layer includes at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

In some embodiments, the material of the second sub-layer comprises at least one of polyimide, epoxy, acrylic.

In some embodiments, the transmittance T of the second sub-layer satisfies: t is more than or equal to 50% and less than or equal to 95%.

In some embodiments, the transmittance T of the second sub-layer satisfies: t is more than or equal to 60% and less than or equal to 70%.

In some embodiments, the display panel further includes an encapsulation layer and a cover plate, the encapsulation layer is disposed between the display function layer and the anti-reflection function layer, and the anti-reflection function layer is disposed between the encapsulation layer and the cover plate.

In some embodiments, the encapsulation layer includes an encapsulation sub-layer, the first sub-layer being located between the encapsulation sub-layer and the second sub-layer, the first sub-layer being integrally formed with the encapsulation sub-layer.

In some embodiments, the display function layer further includes a pixel definition layer having a pixel opening, the light emitting element being disposed within the pixel opening, the pixel definition layer being capable of insulating the light emitting elements from each other; the pixel defining layer includes a black material.

In a second aspect, an embodiment of the present application provides a display device, including a display panel provided in any one of the foregoing embodiments.

The display panel and the display device provided by the embodiment of the application have the reflection reducing function layer, the refractive indexes of the first sub-layer and the second sub-layer of the reflection reducing function layer are different, and as the ratio of the area occupied by the first section to the area occupied by the second section in the section parallel to the light-emitting surface of the reflection reducing function layer changes along the thickness direction, the refractive index of at least part of the reflection reducing function layer is in a changing state along the thickness direction, so that when ambient light is incident into the reflection reducing function layer, as no optical interface with large refractive index difference exists, the reflectivity of the ambient light is reduced.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of FIG. 1 taken along line A-A;

FIG. 3 is another cross-sectional schematic view of the structure of FIG. 1 taken along line A-A;

FIG. 4 is a schematic view of yet another cross-sectional configuration taken along line A-A of FIG. 1;

FIG. 5 is a schematic view of a further cross-sectional structure taken along line A-A of FIG. 1;

FIG. 6 is a schematic view of a further cross-sectional structure taken along line A-A of FIG. 1;

fig. 7 is a top view of a display device according to an embodiment of the present application.

In the drawings, the drawings are not necessarily to scale.

Reference numerals illustrate:

100. a display panel;

110. displaying a functional layer; 111. a light emitting element; 1111. a first light emitting element; 1112. a second light emitting element; 1113. a third light emitting element; 112. a pixel definition layer;

120. a reflection reducing functional layer; 120a, a first sub-section; 120b, a second sub-section; 120c, a third sub-section; 121. a first sub-layer; 1211. a protrusion; 122. a second sub-layer; 1221. a groove;

130. a cover plate;

140. an encapsulation layer; 141. packaging the sub-layer;

10. a display device;

x, thickness direction; s, a section; s1, a first section; s2, a second section.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Further, for the sake of understanding and ease of description, the size and thickness of each configuration shown in the drawings are arbitrarily shown, but the present application concept is not limited thereto. In the drawings, the thickness of layers, films, panels, regions, etc. are exaggerated for clarity. In the figures, the thickness of some layers and regions are exaggerated for better understanding and ease of description.

It will be understood that when an element such as a layer, film, region 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. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Furthermore, throughout the specification, the word "on" the target element means positioned above or below the target element, and does not necessarily mean positioned "at the upper side" based on the direction of gravity.

Moreover, unless explicitly described to the contrary, the word "comprising" will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

In electronic devices such as mobile phones and tablet computers, some conductive layers, such as a metal layer in a driving transistor or a cathode or anode in a light emitting device, are generally disposed inside a display panel to realize display driving of the display panel. In the related art, in the normal use process of the display panel, external ambient light irradiates onto the conductive layer inside the display panel, total reflection occurs on the conductive layer and the light irradiates back to the environment, so that the light reflected by the ambient light inside the display panel causes certain interference on the normal display of the display panel, and the display effect of the display panel is affected.

In view of this, embodiments of the present application provide a display panel and a display device, and embodiments of the display panel and the display device will be described below with reference to the accompanying drawings.

Embodiments of the present application provide a display panel, which may be an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel.

As shown in fig. 1, 2, 3 and 4, the display panel 100 provided according to the embodiment of the present application includes a display function layer 110 and a reflection reducing function layer 120, and the display function layer 110 includes a light emitting element 111. The anti-reflection function layer 120 is disposed on a side of the display function layer 110, which is close to the light emitting surface of the display panel 100 along the thickness direction X, the anti-reflection function layer 120 includes a first sub-layer 121 and a second sub-layer 122 stacked along the thickness direction X, the first sub-layer 121 is at least partially embedded into the second sub-layer 122, refractive indexes of the first sub-layer 121 and the second sub-layer 122 are different, a cross section S of at least part of the anti-reflection function layer 120 parallel to the light emitting surface includes a first cross section S1 corresponding to the first sub-layer 121 and a second cross section S2 corresponding to the second sub-layer 122, and a ratio of an area occupied by the first cross section S1 to an area occupied by the second cross section S2 in the cross section S varies along the thickness direction.

The display function layer 110 may implement a display function of the display panel 100, and includes a light emitting element 111, where the light emitting element 111 may be an organic light emitting diode (Organic Light Emitting Diode, OLED), and the corresponding display panel 100 is an OLED display panel. Of course, the light emitting element 111 may be a Micro light emitting diode, and the corresponding display panel 100 is a Micro-LED display panel.

In the embodiment where the light emitting element 111 is an organic light emitting diode, the light emitting element 111 includes a cathode, an anode, and an organic light emitting layer, the organic light emitting layer is located between the cathode and the anode, and under the action of an applied voltage, electrons generated by the cathode and holes generated by the anode migrate to the organic light emitting layer, and light with a corresponding color is compositely emitted in the organic light emitting layer.

The display function layer 110 may further include a driving back board, in which a driving circuit is disposed, and the driving circuit is electrically connected to the light emitting element 111 to drive the light emitting element 111 to emit light. The driving circuit may include a driving transistor including a source, a drain, a gate, and an active layer, for example, the light emitting element 111 is an organic light emitting diode, and the source or the drain of the driving transistor is electrically connected to the anode of the light emitting element 111 to supply a corresponding driving current to the anode.

The first section S1 may be a portion of the section S of the anti-reflection layer 120 parallel to the light-emitting surface, corresponding to the first sub-layer 121, and the second section S2 may be a portion of the section S of the anti-reflection layer 120 parallel to the light-emitting surface, corresponding to the second sub-layer 122. The ratio of the area occupied by the first section S1 to the area occupied by the second section S2 varies in the thickness direction, that is, the ratio of the areas of the first section S1 and the second section S2 among the plurality of sections S of the anti-reflection coating layer varies in the thickness direction.

The anti-reflection function layer 120 comprises a first sub-layer 121 and a second sub-layer 122, the refractive indexes of the first sub-layer 121 and the second sub-layer 122 are different, the refractive index of the first sub-layer 121 is n1, the refractive index of the second sub-layer 122 is n2, and the reflectivity m of light perpendicularly incident to the first sub-layer 121 from the second sub-layer 122 is as follows: m= [ (n 1-n 2)/(n1+n2)] ² . Due to the first section S1 of the sections SThe ratio of the occupied area to the occupied area of the second section S2 continuously changes along the thickness direction, and at least a part of the refractive index of the anti-reflection layer 120 is continuously changed along the thickness direction, so that when ambient light enters the anti-reflection layer 120, an optical interface with a large refractive index difference does not exist, and the reflectivity of the ambient light is reduced.

Alternatively, it is possible to set that the ratio of the area occupied by the first section S1 to the area occupied by the second section S2 continuously varies throughout the anti-reflection function layer 120 in the thickness direction, or to set that the ratio of the area occupied by the first section S1 to the area occupied by the second section S2 continuously varies only in a portion of the anti-reflection function layer 120 in the thickness direction.

Alternatively, the anti-reflection layer 120 may include a first sub-layer 121 and a second sub-layer 122, and of course, the anti-reflection layer 120 may also include a plurality of first sub-layers 121 and a plurality of second sub-layers 122, where the refractive index of the different first sub-layers 121 may be the same, or the refractive index of the different first sub-layers 121 may be different. Similarly, the refractive index of the different second sub-layers 122 may be the same, or the refractive index of the different second sub-layers 122 may be different.

It can be appreciated that the anti-reflection functional layer 120 includes a first sub-layer 121 and a second sub-layer 122, and the anti-reflection functional layer 120 has a simple structure, and the anti-reflection functional layer 120 is used to reduce the reflection of the display panel 100 to external ambient light, which is beneficial to simplifying the manufacturing process of the display panel 100.

The display panel 100 may further have a cover plate 130, and the cover plate 130 may include an inorganic material and be disposed at a side of the anti-reflection function layer 120 facing away from the display function layer 110 to prevent external water, oxygen, etc. from entering the display function layer 110 to cause a certain corrosion to the light emitting device or the related conductive layer.

The display panel 100 provided in this embodiment has the anti-reflection function layer 120, where the anti-reflection function layer 120 includes the first sub-layer 121 and the second sub-layer 122, and the refractive indexes of the first sub-layer 121 and the second sub-layer 122 are different, because the ratio of the area occupied by the first section S1 corresponding to the first sub-layer 121 to the area occupied by the second section S2 corresponding to the second sub-layer 122 in the section S parallel to the light-emitting surface of the anti-reflection function layer 120 continuously changes along the thickness direction, at least part of the refractive index of the anti-reflection function layer 120 is continuously changed along the thickness direction, so that when ambient light is incident into the anti-reflection function layer 120, the reflectivity of the ambient light is reduced because there is no optical interface with a large refractive index difference.

In some embodiments, the ratio of the area occupied by the first section S1 of the corresponding first sub-layer 121 to the area occupied by the second section S2 of the corresponding second sub-layer 122 in the section S continuously varies in the thickness direction X.

In this way, the ratio of the area occupied by the first section S1 corresponding to the first sub-layer 121 and the area occupied by the second section S2 corresponding to the second sub-layer 122 in the anti-reflection coating 120 continuously changes along the thickness direction, so that at least part of the refractive index of the anti-reflection coating 120 is continuously changed along the thickness direction, and thus, when ambient light enters the anti-reflection coating 120, an optical interface with a large refractive index difference does not exist, and the reflectivity of the ambient light is reduced.

In some embodiments, the ratio of the area occupied by the first section S1 to the area occupied by the second section S2 in the section S continuously decreases in a direction approaching the light-emitting surface.

The first section S1 is a portion of the section S corresponding to the first sub-layer 121, and the first sub-layer 121 may be located on a side of the second sub-layer 122 close to the display function layer 110, so that the area of the first section S1 gradually decreases along a direction away from the display function layer 110, after the first sub-layer 121 is formed, the second sub-layer 122 is conveniently embedded into the first sub-layer 121 in a process of preparing the second sub-layer 122, which is beneficial to reducing the process difficulty of preparing the first sub-layer 121 and the second sub-layer 122.

In some embodiments, the first sub-layer 121 is disposed between the second sub-layer 122 and the display function layer 110, and then the first sub-layer 121 is closer to the display function layer 110 than the second sub-layer 122, and the refractive index of the first sub-layer 121 is greater than the refractive index of the second sub-layer 122.

The refractive index of the first sub-layer 121 is greater than that of the second sub-layer 122, so that the refractive index matching of the light emitted by the light emitting element 111 at the interface between the first sub-layer 121 and the second sub-layer 122 is improved, and the light emitting efficiency of the display panel 100 is improved.

In some embodiments, the refractive index n1 of the first sub-layer 121 and the refractive index n2 of the second sub-layer 122 satisfy: n1-n2 is more than or equal to 0.1. The arrangement of n1-n2 being equal to or greater than 0.1 is beneficial to further improving the refractive index matching of the light emitted by the light emitting element 111 at the interface of the first sub-layer 121 and the second sub-layer 122, and further improving the light extraction efficiency of the display panel 100.

In some embodiments, the refractive index n1 of the first sublayer 121 satisfies: n1 is more than or equal to 1.7 and less than or equal to 2.2.

Alternatively, n1 may be 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, or the like.

Setting n1 to 2.2, which is 1.7 or less, is convenient for realizing n1-n2 to 0.1 or more while ensuring normal propagation of the light emitted by the light emitting element 111 by the first sub-layer 121, and is beneficial for ensuring normal light emitting efficiency of the display panel 100.

In some embodiments, the refractive index of the second sub-layer 122 satisfies: n2 is more than or equal to 1.2 and less than or equal to 1.7.

Alternatively, n2 may be 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, or the like.

Setting n2 to 1.2 is less than or equal to 1.7, and ensuring normal transmission of light emitted by the light-emitting element 111 by the second sub-layer 122, n1-n2 is more than or equal to 0.1, and ensuring normal light-emitting efficiency of the display panel 100 is facilitated.

In some embodiments, the thickness of the anti-reflection functional layer 120 does not exceed 5 μm.

Alternatively, the thickness of the anti-reflection functional layer 120 may be 5 μm, 4 μm, 3 μm, 2 μm, 1 μm, or the like.

The thickness of the anti-reflection function layer 120 is not more than 5 μm, which is advantageous for reducing the thickness of the display panel 100, and is more suitable for flexible display panels such as folding or curling.

Referring to fig. 1, 2, 3, and 4, in some embodiments, the first sub-layer 121 includes a plurality of protrusions 1211, and the second sub-layer 122 includes a plurality of recesses 1221, the protrusions 1211 cooperating with the recesses 1221.

Alternatively, the protrusion 1211 may have a truncated cone shape with a small upper part and a large lower part, a cone shape, a square table shape with a small upper part and a large lower part, a square cone shape, a semi-ellipsoidal shape with a small upper part and a large lower part, or a pyramid shape, or the like.

With continued reference to fig. 1, 2, 3, and 4, in some embodiments, the protrusions 1211 continuously taper along a cross-section S1 perpendicular to the thickness direction X, pointing from the first sublayer 121 to the second sublayer 122.

In this way, at least part of the interface between the protrusion 1211 and the groove 1221 is inclined with respect to the thickness direction X, and the refractive index of at least part of the anti-reflection layer is continuously changed along the thickness direction X, so that when ambient light is incident into the anti-reflection layer, the reflectivity of the ambient light is reduced because there is no optical interface having a large refractive index difference.

Alternatively, for the first sub-layer 121 disposed between the second sub-layer 122 and the display function layer 110, the first sub-layer 121 is formed, and then the second sub-layer 122 is prepared on the first sub-layer 121.

Therefore, along the direction in which the first sub-layer 121 points to the second sub-layer 122, the protrusions 1211 continuously gradually decrease along the section S1 perpendicular to the thickness direction X, which is advantageous for further reducing the reflectivity of the ambient light and for reducing the process difficulty of the anti-reflection function layer 120 during the manufacturing process.

The protrusions 1211 may be a structure having an arbitrary shape as long as the refractive index variation of the anti-reflection function layer 120 in the thickness direction is achieved.

In some embodiments, the protrusions 1211 are conical, frustoconical, semi-ellipsoidal, or pyramidal.

Thus, the projection 1211 has a circular shape, a triangular shape, a trapezoidal shape, or the like along a section S parallel to the thickness direction X. The plurality of projections 1211 may be provided to have the same size in the thickness direction X, and thus, the processing and molding of the projections 1211 are facilitated.

The protrusions 1211 are cone-shaped, truncated cone-shaped with small upper part and large lower part, square table-shaped with small upper part and large lower part, square cone-shaped, semi-ellipsoidal or pyramid-shaped with small upper part and large lower part, so that the reflectivity of the ambient light is reduced, and the first sub-layer 121 and the second sub-layer 122 are also convenient to process and form.

With continued reference to fig. 1, 2, 3 and 4, in some embodiments, the spacing w of adjacent two protrusions 1211 in a direction perpendicular to the thickness direction X satisfies: w is more than or equal to 100nm and less than or equal to 2000nm.

Alternatively, in the direction perpendicular to the thickness direction X, the pitch w of the adjacent two protrusions 1211 may be: 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, 1300nm, 1400nm, 1500nm, 1600nm, 1700nm, 1800nm, 1900nm or 2000nm, etc.

It will be appreciated that, since the protrusions 1211 are matched with the grooves 1221, the spacing between two adjacent protrusions 1211 is set to satisfy the above numerical range, and the corresponding two adjacent grooves 1221 of the second sub-layer 122 also satisfy the above numerical range.

The spacing w between two adjacent protrusions 1211 is set to satisfy: w is less than or equal to 100nm and less than or equal to 2000nm, which is beneficial to ensuring the matching of the protrusions 1211 and the grooves 1221, thereby further reducing the reflectivity of ambient light and also being beneficial to reducing the process difficulty of combining the first sub-layer 121 and the second sub-layer 122.

With continued reference to fig. 1, 2, 3, and 4, in some embodiments, the dimension h of the protrusions 1211 along the thickness direction X satisfies: h is more than or equal to 200nm and less than or equal to 3000nm.

Alternatively, h may be: 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, 1300nm, 1400nm, 1500nm, 1600nm, 1700nm, 1800nm, 1900nm, 2000nm, 2100nm, 2200nm, 2300nm, 2400nm, 2500nm, 2600nm, 2700nm, 2800nm, 2900nm, 3000nm, or the like.

Since the projections 1211 and the recesses 1221 are fitted to each other, the dimensions of the projections 1211 in the thickness direction X are set to satisfy the above-described numerical range, and the dimensions of the recesses 1221 of the corresponding second sub-layer 122 in the thickness direction X also satisfy the above-described numerical range.

This arrangement advantageously ensures that the protrusions 1211 mate with the recesses 1221, thereby further reducing the reflectivity of ambient light and also reducing the difficulty of the process of bonding the first and second sub-layers 121, 122.

As shown in fig. 1 and 5, in some embodiments, the light emitting element 111 includes a first light emitting element 1111 for emitting red light, a second light emitting element 1112 for emitting green light, and a third light emitting element 1113 for emitting blue light, and the anti-reflection function layer 120 includes a first sub-portion 120a, a second sub-portion 120b, and a third sub-portion 120c, at least part of the orthographic projection of the first sub-portion 120a in the thickness direction X is located in the area where the first light emitting element 1111 is located, at least part of the orthographic projection of the second sub-portion 120b in the thickness direction X is located in the area where the second light emitting element 1112 is located, and at least part of the orthographic projection of the third sub-portion 120c in the thickness direction X is located in the area where the third light emitting element 1113 is located. The spacing between two adjacent protrusions 1211 in the first sub-portion 120a is d1, the spacing between two adjacent protrusions 1211 in the second sub-portion 120b is d2, and the spacing between two adjacent protrusions 1211 in the third sub-portion 120c is d3, with d1 > d2 > d3.

At least a portion of the orthographic projection of the first sub-portion 120a along the thickness direction X is located in the area where the first light emitting element 1111 is located, that is, the orthographic projection of the first sub-portion 120a along the thickness direction X may cover the area where the first light emitting element 1111 is located or be located in the area where the first light emitting element 1111 is located. Similarly, the orthographic projection of the second sub-portion 120b along the thickness direction X may cover the area where the second light emitting element 1112 is located, or may be located in the area where the second light emitting element 1112 is located; the orthographic projection of the third sub-portion 120c in the thickness direction X may cover the area where the third light emitting element 1113 is located, or may be located in the area where the third light emitting element 1113 is located.

Since the wavelength of red light is greater than the wavelengths of green and blue light, and the wavelength of green light is greater than the wavelength of blue light. The distance d1 between two adjacent protrusions 1211 in the first sub-portion 120a is set to be larger than the distance d2 between two adjacent protrusions 1211 in the second sub-portion 120b, and the distance d2 between two adjacent protrusions 1211 in the second sub-portion 120b is set to be larger than the distance d3 between two adjacent protrusions 1211 in the third sub-portion 120c, so that the reflection chromaticity can be adjusted by controlling the reflectance ratio of red, green and blue light in the ambient light of different sub-portions, and the screen body can exhibit a better integral black effect.

It will be appreciated that the specific values of d1, d2 and d3 may be set according to the magnitudes of the red, green and blue wavelengths and their propagation characteristics.

In some embodiments, the material of the first sublayer 121 includes at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

Alternatively, the material of the first sub-layer 121 may include any one, two or more of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride. Silica, titania, zirconia, alumina, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride all have high refractive indices.

The first sub-layer 121 may be formed by CVD (Chemical Vapor Deposition ), PVD (Physical Vapor Deposition, physical vapor deposition), ALD (Atomic Layer Deposition ), or the like.

The arrangement is beneficial to ensuring that the first sub-layer 121 has a higher refractive index so as to meet the requirement that n1-n2 is more than or equal to 0.1, and further is beneficial to ensuring the light emitting efficiency of the display panel 100.

In some embodiments, the first sub-layer 121 includes an organic material including at least one of polyimide, epoxy, and acrylic, and a nanoparticle material including at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

It can be appreciated that the organic polyimide, epoxy, and acrylic have better flexibility, so that the stretching or folding function of the display panel 100 can be conveniently achieved.

The organic matter can be prepared and molded by a rotary coating, a surface coating process, ink-jet printing or nano-imprinting method and the like.

The nano particles are nano-sized granular objects, the nano particles are filled in the organic matters, and the nano particles are arranged from at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride and gallium boride, so that the first sublayer 121 has a corresponding higher refractive index.

Therefore, the first sub-layer 121 includes the organic matter and the nano particles, so that the first sub-layer 121 has better flexibility on the premise of maintaining the refractive index of the first sub-layer 121, and the bending or folding function of the display panel 100 is conveniently realized.

In some embodiments, the material of the second sub-layer 122 includes at least one of polyimide, epoxy, acrylic.

Alternatively, the material of the second sub-layer 122 may include any one, two, or more of polyimide, epoxy, and acrylic.

The second sub-layer 122 may be formed by spin coating, a topcoat process, ink jet printing, or nanoimprinting.

The material of the second sub-layer 122 includes at least one of polyimide, epoxy, and acrylic, so as to ensure the refractive index of the second sub-layer 122, and facilitate ensuring that the relationship between the refractive index n1 of the first sub-layer 121 and the refractive index n2 of the second sub-layer 122 satisfies: n1-n2 is more than or equal to 0.1.

In some embodiments, the transmittance T of the second sub-layer 122 satisfies: t is more than or equal to 50% and less than or equal to 95%.

Alternatively, the transmittance T of the second sub-layer 122 may be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or the like.

It can be appreciated that the higher the transmittance of the second sub-layer 122, the more advantageous the light emitted by the light emitting element 111 is for emitting light to the light emitting surface, and the lower the transmittance of the second sub-layer 122, the better the blocking effect of the second sub-layer on the ambient light is, and the more advantageous the interference of the reflection of the ambient light in the display panel 100 on the normal display of the display panel 100 is reduced.

Therefore, the transmittance T of the second sub-layer 122 is set to satisfy: t is more than or equal to 50% and less than or equal to 95%, balance can be achieved between improving the light emitting efficiency of the light emitting element 111 and reducing the reflection of the display panel to the ambient light, and the display panel is beneficial to reducing the interference of the ambient light to the normal display of the display panel 100 and improving the display effect while ensuring that the display panel 100 has certain light emitting efficiency.

In some embodiments, the transmittance T of the second sub-layer 122 satisfies: t is more than or equal to 60% and less than or equal to 70%.

Alternatively, the transmittance T of the second sub-layer 122 may be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, or the like.

It can be understood that the higher the transmittance of the second sub-layer 122, the more favorable the light emitted by the light emitting element 111 to emit light toward the light exit surface, and the lower the transmittance of the second sub-layer 122, the more favorable the reduction of the interference caused by the reflection of the ambient light in the display function layer 110 to the light emission of the light emitting element 111, therefore, the setting of 60% or less and 70% or less can balance between the light exit efficiency of the light emitting element 111 and the reduction of the reflection of the ambient light by the display panel, which is favorable for reducing the interference of the ambient light to the normal display of the display panel 100 and improving the display effect while ensuring the certain light exit efficiency of the display panel 100.

As shown in fig. 1 and 6, in some embodiments, the display panel 100 further includes an encapsulation layer 140 and a cover plate 130, the encapsulation layer 140 is disposed between the display function layer 110 and the anti-reflection function layer 120, and the anti-reflection function layer 120 is disposed between the encapsulation layer 140 and the cover plate 130.

The encapsulation layer 140 can block external water and oxygen from entering the display function layer 120 of the display panel 100, and the cover plate 130 has a certain sealing effect on the display panel.

In some embodiments, encapsulation layer 140 includes encapsulation sub-layer 141, first sub-layer 121 is positioned between encapsulation sub-layer 141 and second sub-layer 122, and first sub-layer 121 is integrally formed with encapsulation sub-layer 141.

The first sub-layer 121 and the encapsulation sub-layer 141 are integrally formed, and thus the first sub-layer 121 and the encapsulation sub-layer 141 may be formed of the same material and manufactured through a single process such as deposition, and the protrusions 1211 are formed on the first sub-layer 121 through etching.

The first sub-layer 121 and the encapsulation sub-layer 141 are integrally formed and are completed through a single layer of preparation process, which is beneficial to simplifying the preparation process of the display panel 100 and improving the preparation efficiency of the display panel 100.

As shown in fig. 1 to 6, in some embodiments, the display function layer 110 further includes a pixel definition layer 112, where the pixel definition layer 112 has a pixel opening, the light emitting element 111 is disposed in the pixel opening, and the pixel definition layer 112 can insulate the light emitting elements 111 from each other; the pixel defining layer 112 includes a black material.

The pixel defining layer 112 may be made of an insulating material to achieve mutual insulation of the adjacent two light emitting elements 111, reducing mutual crosstalk of the adjacent light emitting elements 111.

The pixel defining layer 112 is black, so that after the ambient light irradiates the pixel defining layer 112, at least a portion of the ambient light is absorbed by the pixel defining layer 112, which is favorable for further reducing the ambient light reflected by the display panel 100 and further reducing the interference of the ambient light on the normal display of the display panel 100.

As shown in fig. 7, a display device 10 according to an embodiment of the present application includes a display panel 100 provided in any of the above embodiments.

The display device 10 provided in the embodiment of the present application has the same technical effects due to the adoption of the display panel 100 provided in any of the embodiments described above, and will not be described herein again.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A display panel, comprising:

a display functional layer including a light emitting element;

the anti-reflection function layer is arranged on one side, close to the light-emitting surface of the display panel, of the display function layer along the thickness direction, the anti-reflection function layer comprises a first sub-layer and a second sub-layer which are arranged in a stacked mode along the thickness direction, the first sub-layer is at least partially embedded into the second sub-layer, refractive indexes of the first sub-layer and the second sub-layer are different, at least part of sections, parallel to the light-emitting surface, of the anti-reflection function layer comprise a first section corresponding to the first sub-layer and a second section corresponding to the second sub-layer, and the ratio of the area occupied by the first section to the area occupied by the second section in the sections is changed along the thickness direction.

2. The display panel according to claim 1, wherein a ratio of an area occupied by the first section to an area occupied by the second section among the sections continuously varies in the thickness direction.

3. The display panel according to claim 2, wherein a ratio of an area occupied by the first section to an area occupied by the second section among the sections becomes gradually smaller in a direction approaching the light-emitting surface.

4. The display panel of claim 1, wherein the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer;

preferably, the refractive index n1 of the first sub-layer and the refractive index n2 of the second sub-layer satisfy: n1-n2 is more than or equal to 0.1;

preferably, 1.7.ltoreq.n1.ltoreq.2.2;

preferably, 1.2.ltoreq.n2.ltoreq.1.7.

5. The display panel of claim 1, wherein the anti-reflective layer has a thickness of no more than 5um.

6. The display panel of claim 1, wherein the first sub-layer comprises a plurality of protrusions and the second sub-layer comprises a plurality of grooves, the protrusions and grooves cooperating;

preferably, the first sub-layer is directed to the second sub-layer, and the protrusions are gradually reduced along a section perpendicular to the thickness direction;

preferably, the bulge is conical, round table-shaped with small upper part and big lower part, square conical, semi-ellipsoidal or pyramid-shaped with small upper part and big lower part;

preferably, in a direction perpendicular to the thickness direction, a distance w between two adjacent protrusions satisfies: w is more than or equal to 100nm and less than or equal to 2000nm;

preferably, in the thickness direction, the dimension h of the protrusion satisfies: h is more than or equal to 200nm and less than or equal to 3000nm.

7. The display panel of claim 1, wherein the material of the first sub-layer comprises at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride; and/or the number of the groups of groups,

the material of the second sub-layer comprises at least one of polyimide, epoxy, and acrylic.

8. The display panel of claim 1, further comprising an encapsulation layer and a cover plate, the encapsulation layer disposed between the display functional layer and the anti-reflection functional layer, the anti-reflection functional layer disposed between the encapsulation layer and the cover plate;

preferably, the encapsulation layer comprises an encapsulation sub-layer, the first sub-layer is located between the encapsulation sub-layer and the second sub-layer, and the first sub-layer and the encapsulation sub-layer are integrally formed.

9. The display panel of claim 1, further comprising a pixel definition layer having a pixel opening, the light emitting element disposed within the pixel opening, the pixel definition layer comprising a black material.

10. A display device comprising the display panel according to any one of claims 1 to 9.

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