CN112951888A - Display panel and display device - Google Patents
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- CN112951888A CN112951888A CN202110117886.8A CN202110117886A CN112951888A CN 112951888 A CN112951888 A CN 112951888A CN 202110117886 A CN202110117886 A CN 202110117886A CN 112951888 A CN112951888 A CN 112951888A
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- 238000004806 packaging method and process Methods 0.000 claims description 19
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000005538 encapsulation Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 230000002829 reductive effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and not only can the metal visible phenomenon be weakened on the premise of not influencing the service life of a light-emitting element, but also the light extraction efficiency of the panel can be effectively improved. The display panel includes: a substrate base plate; a light emitting element on the base substrate; a pixel defining layer on the substrate, the pixel defining layer having a plurality of first openings; the first reflecting layer is positioned on one side, back to the substrate base plate, of the pixel defining layer, the first reflecting layer is provided with a plurality of second openings corresponding to the plurality of first openings, the orthographic projection of the first reflecting layer on the substrate base plate covers the orthographic projection of the pixel defining layer on the substrate base plate, and the area of each second opening is smaller than that of the corresponding first opening; and the light shielding layer is positioned on one side of the first reflecting layer, which is back to the substrate, and is provided with a plurality of third openings corresponding to the plurality of second openings, and the orthographic projection of the light shielding layer on the substrate covers the orthographic projection of the first reflecting layer on the substrate.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Organic electroluminescent diode (OLED) Display panels are widely used due to their excellent characteristics, such as high brightness, high efficiency, wide viewing angle, and self-luminescence.
It is well known that a plurality of light emitting elements are provided in an OLED display panel. For the top emission device, the anode in the light emitting device is an opaque reflective electrode, and when the external ambient light is incident on the panel and transmitted to the anode, the light is reflected back to the human eye by the anode, so that the metal is visible. In order to solve the above problems, a layer of optical filter is usually disposed on one side of the light emitting element facing the light emitting direction, and the optical filter is used to filter the external environment light, so as to reduce the amount of light entering the panel.
However, the improvement effect is not ideal only by the filter. Therefore, how to effectively improve the metal visible phenomenon caused by the anode becomes a technical problem to be solved urgently at present.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel and a display device, which can weaken the metal visibility phenomenon without affecting the lifetime of the light emitting element, and effectively improve the light extraction efficiency of the panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a substrate base plate;
a plurality of light emitting elements on the base substrate;
a pixel defining layer on the substrate, the pixel defining layer having a plurality of first openings;
the first reflecting layer is positioned on one side, opposite to the substrate base plate, of the pixel defining layer, the first reflecting layer is provided with a plurality of second openings corresponding to the first openings, the orthographic projection of the first reflecting layer on the substrate base plate covers the orthographic projection of the pixel defining layer on the substrate base plate, and the area of each second opening is smaller than that of the corresponding first opening;
and the light shielding layer is positioned on one side of the first reflecting layer, which faces away from the substrate, and is provided with a plurality of third openings corresponding to the plurality of second openings, and the orthographic projection of the light shielding layer on the substrate covers the orthographic projection of the first reflecting layer on the substrate.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
One of the above technical solutions has the following beneficial effects:
different from the prior art, in the embodiment of the present invention, the first opening of the pixel definition layer is not used as the light emitting area of the panel, and the size of the openings of the light shielding layer and the pixel definition layer is adjusted, so that the third opening having a smaller area in the light shielding layer is used as the light emitting area of the display panel.
According to the arrangement, on one hand, the covering area of the light shielding layer is larger, the light shielding layer can partially cover the anode exposed in the first opening, when external environment light is emitted into the panel, light transmitted towards the edge position of the first opening can be directly absorbed by the light shielding layer and cannot be further transmitted to the anode, so that the light is prevented from being reflected to human eyes by the anode, the reflection of the anode is effectively reduced, and the metal visible phenomenon is weakened; on the other hand, if the embodiment of the invention wants to reduce the reflection of the anode to a greater extent, it is only necessary to reduce the area of the anode exposed in the third opening by reducing the area of the third opening, and it is not necessary to reduce the size of the first opening of the pixel defining layer, so that the area of the light-emitting layer in the first opening is not affected. In other words, in the case where the area of the third opening is constant, the embodiment of the invention can also increase the area of the first opening appropriately, thereby further reducing the current density flowing through the light emitting element.
In addition, according to the embodiment of the invention, the first reflecting layer is further arranged on one side of the light shielding layer facing the substrate, so that the first reflecting layer can be used for reflecting the large-angle light rays emitted by the light emitting layer and the light rays emitted by the part of the light emitting layer shielded by the light shielding layer, and the reflected light rays are directly emitted through the third opening or reflected back to the anode and reflected out by the anode again, so that the light rays which are originally absorbed by the light shielding layer are emitted out of the panel, the light extraction efficiency of the display panel is effectively improved, the brightness, the color, the contrast and other aspects of the picture displayed by the display panel are optimized, and the display performance of the display panel is improved. In addition, the orthographic projection of the light shielding layer on the substrate covers the orthographic projection of the first reflecting layer on the substrate, so that the first reflecting layer can be completely covered by the light shielding layer, and the phenomenon that the first reflecting layer reflects the external environment light is avoided.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art display panel;
FIG. 2 is a top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A1-A2 of FIG. 2;
FIG. 4 is another cross-sectional view taken along line A1-A2 of FIG. 2;
FIG. 5 is a schematic view of another structure of a reflective layer according to an embodiment of the present invention;
FIG. 6 is a schematic view of a first opening and a second opening provided in accordance with an embodiment of the present invention;
FIG. 7 is another schematic view of the first opening and the second opening provided in accordance with an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line B1-B2 of FIG. 7;
FIG. 9 is a schematic view of light transmission according to an embodiment of the present invention;
FIG. 10 is a schematic view of another structure of a first reflective layer according to an embodiment of the present invention;
FIG. 11 is a schematic view of another structure of a first reflective layer according to an embodiment of the present invention;
FIG. 12 is a schematic view of another arrangement position of the first reflective layer according to the embodiment of the present invention;
FIG. 13 is a schematic view of another arrangement position of the first reflective layer according to the embodiment of the present invention;
FIG. 14 is a schematic structural diagram of a second reflective layer according to an embodiment of the present invention;
FIG. 15 is a schematic view of another structure of a second reflective layer according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first and second may be used to describe the opening and the reflective layer in the embodiments of the present invention, the opening and the reflective layer should not be limited by these terms. These terms are only used to distinguish the opening, reflective layer from each other. For example, a first opening may also be referred to as a second opening, and similarly, a second opening may also be referred to as a first opening, without departing from the scope of embodiments of the present invention.
Before solving the technical scheme provided by the embodiment of the invention, the invention firstly explains the problems existing in the prior art:
as shown in fig. 1, fig. 1 is a schematic structural diagram of a display panel in the prior art, the display panel includes a substrate 1 ', a pixel definition layer 2' is disposed on the substrate 1 ', the pixel definition layer 2' has an opening 3 ', and the opening 3' is used for defining a light exiting region of the display panel. A plurality of light emitting elements 4 ' are further provided on the substrate base plate 1 ', and the light emitting elements 4 ' include: an anode 5 ' located at a side of the pixel defining layer 2 ' facing the substrate base plate 1 ', at least a portion of the anode 5 ' being exposed in the opening 3 '; a light emitting layer 6 'located within the opening 3'; a cathode 7 'arranged at the side of the luminescent layer 6' and the pixel definition layer 2 'opposite to the substrate base plate 1'.
Since the improvement effect of the metal visibility phenomenon is not significant only by adding the optical filter, in the prior art, the area of the anode 5 ' exposed in the opening 3 ' is further reduced by reducing the aperture ratio, thereby reducing the reflection of the anode 5 '. However, when the aperture ratio is decreased, the area of the light emitting layer 6 'provided in the aperture 3' is also decreased, which increases the current density flowing through the light emitting element 4 'when the same luminance is achieved, and deteriorates the lifetime of the light emitting element 4', thereby adversely affecting the display performance of the display panel.
Therefore, the embodiment of the invention provides a display panel, which can effectively weaken the metal visible phenomenon caused by the anode on the premise of not influencing the service life of the light-emitting element, and can also obviously improve the light extraction efficiency of the display panel and optimize the display performance.
As shown in fig. 2 and fig. 3, fig. 2 is a top view of a display panel according to an embodiment of the present invention, and fig. 3 is a cross-sectional view taken along a direction a1-a2 in fig. 2, where the display panel includes: a base substrate 1; a plurality of light emitting elements 2 on a base substrate 1, the light emitting elements 2 including an anode 3, a light emitting layer 4, and a cathode 5; a pixel defining layer 6 on the substrate 1, the pixel defining layer 6 being specifically located on a side of the anode 3 facing away from the substrate 1, the pixel defining layer 6 having a plurality of first openings 7, at least a portion of the anode 3 being exposed in the first openings 7, the light emitting layer 4 being located in the first openings 7; the first reflecting layer 8 is positioned on one side, opposite to the substrate base plate 1, of the pixel defining layer 6, the first reflecting layer 8 is provided with a plurality of second openings 9 corresponding to the plurality of first openings 7, the orthographic projection of the first reflecting layer 8 on the substrate base plate 1 covers the orthographic projection of the pixel defining layer 6 on the substrate base plate 1, and the area of each second opening 9 is smaller than that of the corresponding first opening 7; the light shielding layer 10 is positioned on the side of the first reflecting layer 8 opposite to the substrate 1, the light shielding layer 10 is provided with a plurality of third openings 11 corresponding to the plurality of second openings 9, and the orthographic projection of the light shielding layer 10 on the substrate 1 covers the orthographic projection of the first reflecting layer 8 on the substrate 1, that is, the area of each third opening 11 is smaller than or equal to the area of the corresponding second opening 9.
Specifically, the above-mentioned "the area of the second opening 9 is smaller than the area of the corresponding first opening 7" means that the area of the second opening 9 is smaller than the area of the first opening 7 overlapped therewith, and the "the area of the third opening 11 is smaller than or equal to the area of the corresponding second opening 9" means that the area of the third opening 11 is smaller than or equal to the area of the second opening 9 overlapped therewith.
Unlike the prior art, in the embodiment of the present invention, the first opening 7 of the pixel definition layer 6 is not used to define the light exit region of the display panel, and the third opening 11 having a smaller area of the light shielding layer 10 is used as the light exit region of the display panel by adjusting the sizes of the light shielding layer 10 and the opening of the pixel definition layer 6.
With such an arrangement, on one hand, the coverage area of the light shielding layer 10 is larger, the light shielding layer 10 can partially cover the anode 3 exposed in the first opening 7, and when external environment light is incident on the panel, light (light shown by a dotted arrow in fig. 3) transmitted toward the edge of the first opening 7 can be directly absorbed by the light shielding layer 10 and cannot be further transmitted to the anode 3, so that the light is prevented from being reflected to human eyes by the anode 3, the reflection of the anode 3 is effectively reduced, and the metal visibility phenomenon is weakened; on the other hand, if the embodiment of the invention wants to reduce the reflection of the anode 3 to a greater extent, it is only necessary to reduce the area of the anode 3 exposed in the third opening 11 by reducing the area of the third opening 11, and it is not necessary to reduce the size of the first opening 7 of the pixel defining layer 6, so that the area of the light-emitting layer 4 in the first opening 7 is not affected. In other words, in the case where the area of the third opening 11 is constant, the embodiment of the present invention can also increase the area of the first opening 7 appropriately, thereby further reducing the current density flowing through the light emitting element 2.
In addition, according to the embodiment of the invention, the first reflective layer 8 is further arranged on the side of the light shielding layer 10 facing the substrate 1, the first reflective layer 8 can be used for reflecting the large-angle light emitted by the light emitting layer 4 and the light emitted by the part of the light emitting layer 4 shielded by the light shielding layer 10, and the reflected light directly penetrates through the third opening 11 or is reflected back to the anode 3 and is reflected by the anode 3 again, so that the light which is originally absorbed by the light shielding layer 10 is emitted out of the panel, the light extraction efficiency of the display panel is effectively improved, the brightness, the color, the contrast ratio and other aspects of the picture displayed by the display panel are optimized, and the display performance of the display panel is improved. Moreover, by making the orthographic projection of the light shielding layer 10 on the substrate base plate 1 cover the orthographic projection of the first reflection layer 8 on the substrate base plate 1, the light shielding layer 10 can be used to completely cover the first reflection layer 8, and the phenomenon that the first reflection layer 8 reflects the external environment light is avoided.
In an embodiment, as shown in fig. 4, fig. 4 is another cross-sectional view taken along a1-a2 direction in fig. 2, and the area of the third opening 11 is smaller than the area of the corresponding second opening 9.
In the process of forming the first reflective layer 8 and the light-shielding layer 10, the relative positions of the first reflective layer 8 and the light-shielding layer 10 are likely to be shifted due to factors such as process errors, and if the area of the third opening 11 is equal to the area of the second opening 9, a partial region of the first reflective layer 8 may not be covered by the light-shielding layer 10. Therefore, the coverage area of the light shielding layer 10 is set to be larger, even if the relative positions of the first reflective layer 8 and the light shielding layer 10 are deviated, the light shielding layer 10 can still be ensured to completely cover the first reflective layer 8, the first reflective layer 8 is prevented from being exposed, and further the first reflective layer 8 is prevented from reflecting the external environment light.
In an embodiment, as shown in fig. 5, fig. 5 is another structural schematic diagram of the reflective layer provided in the embodiment of the present invention, along the light emitting direction of the display panel, an included angle θ is formed between the first reflective layer 8 and the plane of the substrate base plate 1, that is, the first reflective layer 8 is an inclined reflective structure.
Compare in setting up first reflection stratum 8 to planar reflection structure, the regulation and control degree of the light path of light is bigger when first reflection stratum 8 is inclined plane reflection structure, and the transmission angle scope of the light of being reflected by first reflection stratum 8 is also bigger, and the corresponding reverberation that will have more quantity finally can jet out the panel, has further improved the light extraction efficiency of panel.
Further, as shown in fig. 6 and 7, fig. 6 is a schematic view of a first opening 7 and a second opening 9 provided in the embodiment of the present invention, fig. 7 is another schematic view of the first opening 7 and the second opening 9 provided in the embodiment of the present invention, the second opening 9 has the same shape as the corresponding first opening 7, and an edge of the second opening 9 extends along an edge of the corresponding first opening 7. For example, the first opening 7 and the second opening 9 are both regular hexagons as shown in fig. 6, or the first opening 7 and the second opening 9 are both rectangles as shown in fig. 7.
Based on the above structure, taking fig. 7 as an example, and referring to fig. 8, fig. 8 is a cross-sectional view taken along the direction B1-B2 in fig. 7, the first reflective layer 8 includes a plurality of reflective portions 13, each reflective portion 13 surrounds and forms one second opening 9, and the reflective portions 13 include reflective sidewalls 14 located on the side facing the substrate base plate 1. The two adjacent first openings 7 are respectively a first sub-opening 15 and a second sub-opening 16, and for the reflective sidewall 14 located between the first sub-opening 15 and the second sub-opening 16 and overlapping the first sub-opening 15 in the reflective portion 13, the distance between the reflective sidewall 14 and the substrate base plate 1 decreases along the direction in which the first sub-opening 15 points to the second sub-opening 16.
It should be noted that the first sub-opening 15 and the second sub-opening 16 are not specific limitations on any two first openings 7, and one of any two adjacent first openings 7 is regarded as the first sub-opening 15, and the other is regarded as the second sub-opening 16.
Based on the above arrangement, each edge of the first opening 7 is correspondingly provided with one reflective sidewall 14, and the light emitted from each position of the first opening 7 can be reflected by the reflective sidewall 14. Moreover, as can be seen from the light transmission diagram shown in fig. 9, when the reflective sidewall 14 is inclined in the above direction, after the light emitted from the first sub-opening 15 is reflected by the reflective sidewall 14, the reflected light is more inclined to transmit toward the original area where the first sub-opening 15 is located, so as to avoid the reflected light from being transmitted toward the second sub-opening 16, thereby reducing the risk of color mixing.
Further, referring to fig. 6 and 7 again, the reflective portions 13 are symmetrically disposed along the center point O of the first opening 7 overlapped with the reflective portions, at this time, the distances between the edges of the first opening 7 and the reflective sidewalls 14 close to the edges are equal, the number and degree of adjustment of the reflective sidewalls 14 to the light emitted from different positions of the first opening 7 are close, and the uniformity of the brightness of the light emitted by the light emitting element 2 is improved.
Further, referring to fig. 8 again, the reflective sidewalls 14 of two adjacent reflective portions 13 intersect, and at this time, the reflective surfaces of the reflective portions 13 facing the substrate base plate 1 are reflective inclined surfaces, so that the degree of light adjustment is greater.
In an embodiment, as shown in fig. 10 and 11, fig. 10 is a schematic structural diagram of a first reflective layer 8 according to an embodiment of the present invention, and fig. 11 is a schematic structural diagram of the first reflective layer 8 according to an embodiment of the present invention, in which the reflective sidewall 14 is an arc surface, and a transmission angle range of light reflected by the reflective sidewall 14 is wider, and a reflection effect is better.
For example, referring to fig. 10 again, the reflective sidewall 14 is recessed toward the substrate 1, so that the reflective sidewall 14 has stronger scattering effect on light, the transmission of the reflected light is more divergent, and the brightness uniformity of the light emitted by the light emitting device 2 is higher.
Alternatively, referring to fig. 11 again, the reflective sidewall 14 protrudes away from the substrate 1, so that the reflective sidewall 14 can achieve a better light-gathering effect and the brightness of the light emitted by the light-emitting device 2 is higher.
In one embodiment, referring to fig. 5 again, the display panel further includes: the packaging layer 17 is positioned on one side of the pixel defining layer 6, which is opposite to the substrate base plate 1, and the packaging layer 17 is used for effectively isolating water and oxygen and preventing a film layer deposited on the substrate base plate 1 from being corroded by the water and oxygen; a filter layer 18 positioned on the side of the encapsulation layer 17 opposite to the substrate 1; a reflective layer accommodating structure 20 located between the encapsulation layer 17 and the filter layer 18, the first reflective layer 8 is located on a surface of the reflective layer accommodating structure 20 on a side away from the base substrate 1, and an orthographic projection of the first reflective layer 8 on the base substrate 1 covers an orthographic projection of the reflective layer accommodating structure 20 on the base substrate 1.
Compared with the whole surface covering of the reflecting layer accommodating structure 20, by adopting the above arrangement mode, the reflecting layer accommodating structure 20 does not cover the region except the second opening 9, so that the loss of light emitted by the light emitting layer 4 when the light passes through the reflecting layer accommodating structure 20 is reduced, and the light emitting brightness is improved.
In an embodiment, as shown in fig. 12, fig. 12 is a schematic view of another arrangement position of the first reflective layer 8 according to an embodiment of the present invention, and the display panel further includes: the packaging layer 17 is positioned on one side of the pixel defining layer 6, which is opposite to the substrate base plate 1, and the packaging layer 17 is used for effectively isolating water and oxygen and preventing a film layer deposited on the substrate base plate 1 from being corroded by the water and oxygen; a filter layer 18 positioned on the side of the encapsulation layer 17 opposite to the substrate 1; wherein the encapsulation layer 17 comprises a recess 21 and the first reflective layer 8 is located in the recess 21.
In this kind of mode of setting, only need to etch the recess 21 that is used for holding first reflection stratum 8 to encapsulation layer 17 and can multiplex as reflection stratum containing structure with encapsulation layer 17, and need not to set up extra reflection stratum containing structure again, both saved process flow, still thinned the whole thickness of panel. Moreover, the distance between the packaging layer 17 and the light-emitting layer 4 is short, and the light emitted by the light-emitting layer 4 can be transmitted to the first reflecting layer 8 only by passing through a small number of film layers, so that the loss of the light in the transmission process is reduced, a large number of light is reflected by the first reflecting layer 8, and the light extraction efficiency is improved to a greater extent.
Further, referring to fig. 12 again, the encapsulation layer 17 includes a first inorganic encapsulation layer 22, an organic encapsulation layer 2323 and a second inorganic encapsulation layer 24, which are stacked, and the groove 21 is located in the organic encapsulation layer 23. Generally, the organic encapsulation layer 23 has a larger thickness than the inorganic encapsulation layer, so that the formation of the groove 21 in the organic encapsulation layer 23 has less process difficulty, and the selectable range of the depth of the groove 21 is larger, and accordingly, the selectable range of the included angle between the first reflective layer 8 and the plane of the substrate 1 is larger.
In an embodiment, as shown in fig. 13, fig. 13 is a schematic view of a further disposition position of the first reflective layer 8 according to an embodiment of the present invention, and the display panel further includes: the packaging layer 17 is positioned on one side of the pixel defining layer 6, which is opposite to the substrate base plate 1, and the packaging layer 17 is used for effectively isolating water and oxygen and preventing a film layer deposited on the substrate base plate 1 from being corroded by the water and oxygen; a filter layer 18 on the side of the encapsulation layer 17 facing away from the substrate base plate 1.
The filter layer 18 includes a plurality of color resistors 19 corresponding to the plurality of first openings 7 one-to-one, the color resistors 19 have the same color as the light emitting layers 4 in the corresponding first openings 7, and when external ambient light penetrates through the color resistors 19 and enters the panel, light with different colors can be filtered by the color resistors 19, so that the quantity of light entering the panel is reduced, and reflection is reduced to a certain extent. The color resistors 19 comprise a first bottom surface 25 close to one side of the substrate base plate 1 and a first side surface 26 intersecting the first bottom surface, the included angle alpha between the first side surface 26 and the first bottom surface 25 is less than 90 degrees, and the first reflecting layer 8 is positioned in the gap between the first side surfaces 26 of two adjacent color resistors 19.
In this kind of mode of setting, only need adjust the structure of look resistance 19, utilize look resistance 19 to form accommodation space for first reflection stratum 8, need not to set up extra reflection stratum accommodation structure again, both saved process flow, still thinned the whole thickness of panel.
In an embodiment, as shown in fig. 14, fig. 14 is a schematic structural diagram of a second reflective layer 29 provided in an embodiment of the present invention, and the pixel defining layer 6 includes a second top surface 27 on a side away from the substrate base plate 1 and a second side surface 28 intersecting with the second top surface 27; the display panel further comprises a second reflective layer 29, the second reflective layer 29 being located at the second side 28 of the pixel defining layer 6, and the second reflective layer 29 being located at a side of the first reflective layer 8 facing the substrate base 1.
By disposing the second reflective layer 29 on the second side surface 28 of the pixel defining layer 6, the second reflective layer 29 is an inclined reflective structure having an included angle with the plane of the substrate 1, so that the second reflective layer 29 can further reflect the light with large angle emitted from the light emitting layer 4 or the light emitted from the light emitting layer 4 shielded by the light shielding layer 10, thereby further improving the light extraction efficiency.
Further, since the second reflective layer 29 is an inclined reflective structure, the second reflective layer 29 can adjust the light path of light to a greater extent, and therefore, the first reflective layer 8 does not need to be set to an inclined reflective structure with high process difficulty, and can be directly set to a planar reflective structure. At this time, referring to fig. 14 again, the surface of the first reflective layer 8 facing the substrate base plate 1 is a flat surface.
In an embodiment, as shown in fig. 15, fig. 15 is another schematic structural diagram of the second reflective layer 29 according to an embodiment of the present invention, a protrusion 30 is further disposed on the pixel defining layer 6, and the second reflective layer 29 extends to the protrusion 30 and covers a surface of the protrusion 30.
If the protrusion 30 is not disposed on the top of the pixel defining layer 6, a portion of the large-angle light emitted from the light emitting layer 4 may be directly reflected by the first reflective layer 8 into the adjacent first opening 7, and further reflected by the anode 3 in the first opening 7, thereby causing color mixing. After the protrusion 30 is additionally arranged on the pixel defining layer 6, when part of the large-angle light is transmitted to the protrusion 30, the transmission direction of the light is changed by the second reflective layer 29 covered on the protrusion 30, so that the risk that the light is directly reflected to the adjacent first opening 7 by the first reflective layer 8 is reduced, and color mixing is avoided.
Further, referring to fig. 15, the light emitting device 2 includes: an anode 3 on a side of the pixel defining layer 6 facing the base substrate 1, at least a portion of the anode 3 being exposed in the first opening 7; a light-emitting layer 4 located on the side of the anode 3 opposite to the substrate 1 and located in the first opening 7; and a cathode 5 positioned on the side of the light-emitting layer 4 and the pixel defining layer 6 facing away from the substrate base plate 1. Wherein the second reflective layer 29 is electrically insulated from the anode 3.
When the second reflective layer 29 covers the surface of the protruding portion 30, the second reflective layer 29 contacts the cathode 5, so that the second reflective layer 29 is electrically insulated from the anode 3, thereby preventing the anode 3 and the cathode 5 from being electrically connected to each other, further preventing the signals transmitted by the anode 3 and the cathode 5 from being affected, and further improving the accuracy of the luminance of the light emitting device 2.
In particular, a break may be etched in a portion of the second reflective layer 29 near the anode 3 to achieve electrical insulation between the second reflective layer 29 and the anode 3.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, as shown in fig. 16, fig. 16 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 16 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (18)
1. A display panel, comprising:
a substrate base plate;
a plurality of light emitting elements on the base substrate;
a pixel defining layer on the substrate, the pixel defining layer having a plurality of first openings;
the first reflecting layer is positioned on one side, opposite to the substrate base plate, of the pixel defining layer, the first reflecting layer is provided with a plurality of second openings corresponding to the first openings, the orthographic projection of the first reflecting layer on the substrate base plate covers the orthographic projection of the pixel defining layer on the substrate base plate, and the area of each second opening is smaller than that of the corresponding first opening;
and the light shielding layer is positioned on one side of the first reflecting layer, which faces away from the substrate, and is provided with a plurality of third openings corresponding to the plurality of second openings, and the orthographic projection of the light shielding layer on the substrate covers the orthographic projection of the first reflecting layer on the substrate.
2. The display panel according to claim 1, wherein an area of the third opening is smaller than an area of the second opening corresponding thereto.
3. The display panel of claim 1, wherein an included angle is formed between the first reflective layer and the substrate along a light exit direction of the display panel.
4. The display panel according to claim 3, wherein the second opening and the first opening corresponding thereto are the same in shape, and an edge of the second opening extends along an edge of the first opening corresponding thereto;
the first reflecting layer comprises a plurality of reflecting parts, each reflecting part surrounds to form one second opening, and each reflecting part comprises a reflecting side wall positioned on one side facing the substrate base plate;
the two adjacent first openings are respectively a first sub-opening and a second sub-opening, and for the reflecting side wall which is positioned between the first sub-opening and the second sub-opening and overlapped with the first sub-opening in the reflecting part, the distance between the reflecting side wall and the substrate base plate is decreased progressively along the direction that the first sub-opening points to the second sub-opening.
5. The display panel according to claim 4, wherein the reflection portions are symmetrically disposed along a center point of the first opening overlapped therewith.
6. The display panel according to claim 4, wherein the reflective sidewalls of adjacent two of the reflective portions intersect.
7. The display panel according to claim 4,
the reflective sidewall is an arcuate surface.
8. The display panel according to claim 7,
the reflective sidewall is recessed toward the substrate base.
9. The display panel according to claim 7,
the reflective sidewall protrudes away from the substrate base plate.
10. The display panel according to claim 3, characterized in that the display panel further comprises:
the packaging layer is positioned on one side, back to the substrate, of the pixel defining layer;
the filter layer is positioned on one side, back to the substrate, of the packaging layer;
the first reflection layer is positioned on the surface of one side, far away from the substrate, of the reflection layer containing structure, and the orthographic projection of the first reflection layer on the substrate covers the orthographic projection of the reflection layer containing structure on the substrate.
11. The display panel according to claim 3, characterized in that the display panel further comprises:
the packaging layer is positioned on one side, back to the substrate, of the pixel defining layer;
the filter layer is positioned on one side, back to the substrate, of the packaging layer;
wherein the packaging layer comprises a groove, and the first reflecting layer is positioned in the groove.
12. The display panel according to claim 11,
the packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer which are stacked, and the groove is located in the organic packaging layer.
13. The display panel according to claim 3, characterized in that the display panel further comprises:
the packaging layer is positioned on one side, back to the substrate, of the pixel defining layer;
the filter layer is positioned on one side, back to the substrate, of the packaging layer;
the filter layer comprises a plurality of color resistors in one-to-one correspondence with the first openings, each color resistor comprises a first bottom surface and a first side surface intersected with the first bottom surface, the included angle between each first side surface and the corresponding first bottom surface is smaller than 90 degrees, and the first reflection layer is located at two adjacent color resistors in a gap between the first side surfaces.
14. The display panel according to claim 1,
the pixel defining layer comprises a second top surface and a second side surface, wherein the second top surface is far away from one side of the substrate base plate, and the second side surface is intersected with the second top surface;
the display panel further comprises a second reflecting layer, wherein the second reflecting layer is positioned on the second side face of the pixel defining layer, and the second reflecting layer is positioned on one side, facing the substrate base plate, of the first reflecting layer.
15. The display panel according to claim 14,
the surface of the first reflecting layer facing the substrate base plate is a flat surface.
16. The display panel according to claim 14, wherein the pixel defining layer is further provided with a protrusion, and the second reflective layer extends to the protrusion and covers a surface of the protrusion.
17. The display panel according to claim 14, wherein the light-emitting element comprises:
an anode on a side of the pixel defining layer facing the substrate base plate, at least a portion of the anode being exposed within the first opening;
the light-emitting layer is positioned on one side, back to the substrate base plate, of the anode and positioned in the first opening;
the cathode is positioned on one side, opposite to the substrate, of the light-emitting layer and the pixel defining layer;
the second reflective layer is electrically insulated from the anode.
18. A display device comprising the display panel according to any one of claims 1 to 17.
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| CN202110117886.8A CN112951888A (en) | 2021-01-28 | 2021-01-28 | Display panel and display device |
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| CN202110117886.8A CN112951888A (en) | 2021-01-28 | 2021-01-28 | Display panel and display device |
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