CN114284454B - Display panel and display device - Google Patents
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Abstract
The application provides a display panel and a display device, wherein the display panel comprises a light emitting layer, a light extracting layer and a light correcting layer, wherein the light extracting layer is positioned on the light emitting side of the light emitting layer, and the light correcting layer is positioned on one side of the light extracting layer far away from the light emitting layer; the light-emitting layer comprises a light-emitting area and a non-light-emitting area which are adjacent; the light extraction layer comprises a first main body layer and a light extraction structure positioned in the first main body layer, the refractive index of the first main body layer is larger than that of the light extraction structure, and the orthographic projection of the light extraction structure on the light-emitting layer is positioned in a non-light-emitting area; the light correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and orthographic projection of the light correction structures on the light emitting layer is positioned in a non-light emitting area. The light correction layer corrects the deflected light by using the light correction structure, thereby improving the uniformity of the brightness of the display panel. Therefore, the display panel and the display device provided by the application can improve the uniformity of the brightness of the display panel, thereby improving the display effect of the display panel and the display device.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display panel has the advantages of active Light emission, good temperature characteristics, low power consumption, quick response, flexibility, ultra-thin structure, low cost and the like, and is considered to have a huge application prospect in the technical field of display.
In the related art, a light extraction microstructure (High Light Extraction Micro Structure, abbreviated as HLEMS) is provided on the light exit surface of the display panel, and the light extraction microstructure can reduce light loss and improve brightness of the display panel by using the principle of total reflection.
However, the display panel having the light extraction microstructure described above is prone to have a problem of uneven brightness, which affects the display effect.
Disclosure of Invention
In view of at least one technical problem described above, embodiments of the present application provide a display panel and a display device, which can improve uniformity of brightness of the display panel, thereby improving display effects of the display panel and the display device.
In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:
a first aspect of embodiments of the present application provides a display panel, including a light emitting layer, a light extracting layer, and a light correcting layer, where the light extracting layer is located on a light emitting side of the light emitting layer, and the light correcting layer is located on a side of the light extracting layer away from the light emitting layer;
the light-emitting layer comprises a light-emitting area and a non-light-emitting area which are adjacent;
the light extraction layer comprises a first main body layer and a light extraction structure positioned in the first main body layer, the refractive index of the first main body layer is larger than that of the light extraction structure, and the orthographic projection of the light extraction structure on the light-emitting layer is positioned in a non-light-emitting area;
the light correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and orthographic projection of the light correction structures on the light emitting layer is positioned in a non-light emitting area.
The display panel that this embodiment provided, display panel include luminescent layer, light take out layer and light correction layer, and light takes out the layer and is located the play light side of luminescent layer, and light takes out the layer and is used for improving the light extraction rate, and luminescent layer includes adjacent luminescent region and non-luminescent region, and the luminescent region corresponds the pixel unit in the luminescent layer, and non-luminescent region corresponds the pixel in the luminescent layer and prescribes a limit to the layer. The orthographic projection of the light extraction layer on the light emitting layer is located in the light emitting region and the non-light emitting region. The light correction layer is positioned on a side of the light extraction layer remote from the light emitting layer, and is configured to correct light deflected from the light emitting region to an adjacent non-light emitting region, thereby reducing the extent of light deflection. Specifically, the light correction layer has a light correction structure, and the light correction layer corrects the deflected light by using the light correction structure, so that the brightness of each light emitting area is substantially consistent, and the brightness uniformity of the display panel can be improved, so that the display effects of the display panel and the display device can be improved. In addition, the orthographic projection of the light correcting structure on the light emitting layer is positioned in the non-light emitting area so as to avoid the error correction of the light correcting structure on the non-deflected light.
In one possible implementation manner, the light correction structure comprises a part of second main body layer and a light transmission piece, wherein the part of second main body layer is provided with a groove, the light transmission piece is filled in the groove, the shape and the size of the light transmission piece are matched with those of the groove, and the groove is recessed towards the thickness direction of the light correction layer;
the notch of the groove is positioned at one side of the light correction layer facing the light emitting layer, and one side of the light correction layer facing away from the light emitting layer is a plane;
or, the notch of the groove is positioned at one side of the light correction layer, which is away from the light-emitting layer, and one side of the light correction layer, which is towards the light-emitting layer, is a plane;
or, the grooves comprise a first groove and a second groove, the notch of the first groove and the notch of the second groove are respectively positioned on two opposite sides of the light correction layer along the thickness direction, and the orthographic projection of the first groove on the light emitting layer and the orthographic projection of the second groove on the light emitting layer are at least partially overlapped.
Like this, the setting mode of recess is more, can satisfy the demand of the structure of different light correction structures.
In one possible implementation, the groove depth of the groove increases gradually along the edge of the groove to the center of the groove;
preferably, the inner wall surface of the groove is an arc surface.
Thus, the groove has a simpler structure and lower preparation difficulty.
In one possible implementation, the refractive index of the light transmissive element is smaller than the refractive index of the second body layer;
preferably, the side of the light-transmitting member adjacent to the notch of the groove is flush with the notch.
Thus, the flatness of one side of the light-transmitting member, which is close to the notch of the groove, can be ensured.
In one possible implementation, the orthographic projection of the second body layer on the light emitting layer covers the light emitting region and the non-light emitting region.
Thus, the second main body layer can form a complete film layer, the structural stability of the complete film layer is higher, and the flatness of the complete film layer is better.
In one possible implementation, the orthographic projection of the second body layer onto the light emitting layer covers only the non-light emitting region.
Thus, the transmittance of the screen body of the display panel at the light-emitting area is increased, and the loss of light passing through the second main body layer at the light-emitting area can be avoided
In one possible implementation, the light extraction structure includes a light reflecting surface between a side near the light emitting layer and a side far from the light emitting layer, the light extraction structure tapering in cross section parallel to the light emitting layer along the light exit direction;
preferably, a side of the light extraction structure facing away from the light emitting layer is planar;
preferably, a portion of the first body layer is located on a side of the light extraction structure remote from the light emitting layer.
In this way, the area of the light reflecting surface can be increased, corresponding to the inclined arrangement of the light reflecting surface, so that the light reflecting surface can reflect more light.
In one possible implementation, the refractive index of the second bulk layer is not less than the refractive index of the first bulk layer;
and/or, one side of the light emitting layer facing the light extraction layer is provided with an encapsulation layer, and the refractive index of the encapsulation layer is not greater than that of the first main body layer.
In this way, total reflection of light from the first body layer to the second body layer and total reflection of light from the encapsulation layer to the first body layer can be avoided.
In one possible implementation, the orthographic projection of the side of the light extraction structure remote from the light emitting layer onto the light emitting layer is located within the orthographic projection of the light correction structure onto the light emitting layer.
Thus, the situation that the deflected light cannot enter the light correcting structure can be avoided. A second aspect of embodiments of the present application provides a display device, including the display panel in the first aspect.
The display device provided by the embodiment of the application, the display device comprises a display panel, the display panel comprises a light emitting layer, a light extracting layer and a light correcting layer, the light extracting layer is located on the light emitting side of the light emitting layer, the light extracting layer is used for improving the light extracting rate, the light emitting layer comprises a light emitting area and a non-light emitting area which are adjacent, the light emitting area corresponds to a pixel unit in the light emitting layer, and the non-light emitting area corresponds to a pixel limiting layer in the light emitting layer. The orthographic projection of the light extraction layer on the light emitting layer is located in the light emitting region and the non-light emitting region. The light correction layer is positioned on a side of the light extraction layer remote from the light emitting layer, and is configured to correct light deflected from the light emitting region to an adjacent non-light emitting region, thereby reducing the extent of light deflection. Specifically, the light correction layer has a light correction structure, and the light correction layer corrects the deflected light by using the light correction structure, so that the uniformity of the brightness of the display panel can be improved, and the display effects of the display panel and the display device can be improved. In addition, the orthographic projection of the light correcting structure on the light emitting layer is positioned in the non-light emitting area so as to avoid the error correction of the light correcting structure on the non-deflected light.
The construction of the present application, as well as other objects and advantages thereof, will be more readily understood from the description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a light extraction layer according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of another light extraction layer according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a structure of a light correction layer according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another photo-correction layer according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a plano-concave lens according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a biconcave lens according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a first inner wall surface and a second inner wall surface according to an embodiment of the present disclosure;
FIG. 8 is a schematic view of a divergent light path of light transmitted through a biconcave lens according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of an optical path of light corrected by the light correction structure according to an embodiment of the present application.
Reference numerals illustrate:
100: a light emitting layer;
100a: a light emitting region;
100b: a non-light emitting region;
110: a pixel unit;
200: an encapsulation layer;
300: a light extraction layer;
310: a first body layer;
320: a light extraction structure;
330: a light reflection surface;
400: a light correction layer;
410: a light correction structure;
420: a groove;
421: a first groove;
422: a second groove;
423: a first inner wall surface;
424: a second inner wall surface;
430: a light transmitting member;
440: a second body layer.
Detailed Description
In the related art, the display panel includes a light emitting layer and a light extraction layer covering the light emitting side of the light emitting layer, the light extraction layer includes a main body layer and a light extraction structure located in the main body layer, and light is totally emitted on an adjacent surface of the main body layer and the light extraction structure, so as to reduce light emitted into the light extraction structure from the main body layer, thereby reducing loss of light in the light extraction structure, improving light extraction rate, further improving brightness of the display panel, and reducing power consumption of the display panel.
For example, the light emitting layer includes a pixel unit and a pixel defining layer defining a plurality of pixel openings, and the pixel unit is located in the pixel openings. The light can be emitted in a direction perpendicular to the display panel (or other specific angle) under the action of the light extraction layer, that is, the light is emitted out of the display panel from the pixel unit perpendicularly (or other specific angle), so that the front brightness of the display panel is higher.
Due to the process errors, the sizes of the light extraction structures at different positions of the display panel have errors, so that the emergent angles of the light emitted by part of the light emitting layers deviate. For example, when light is irradiated to a light extraction structure of a normal size (the structure shown in fig. 1 a), the light will be emitted in a direction perpendicular to the display panel (or other specific angle).
However, when light irradiates the light extraction structure (the structure shown in B of fig. 1) having an error, the light may be deflected in a direction from the pixel unit to the adjacent pixel defining layer (as shown by a dotted line box B of fig. 1), and the brightness between the deflected pixel unit and the pixel unit not deflected is different under the same observation angle, so that the uniformity of light emission of the display panel is reduced, causing a problem of uneven brightness of the display panel, and affecting the display effects of the display panel and the display device.
The above-mentioned "deflection" may mean that light is emitted from a predetermined angle due to a light extraction structure or other structures, and the light is deflected by the pixel unit toward an adjacent pixel defining layer.
Based on the above-mentioned problem, the embodiment of the application provides a display panel and display device, including luminescent layer, light extraction layer and light correction layer, the light extraction layer is located the light-emitting side of luminescent layer, and the light extraction layer is used for improving the light extraction rate, and the luminescent layer includes adjacent luminescent region and non-luminescent region, and the luminescent region corresponds the pixel unit in the luminescent layer, and non-luminescent region corresponds the pixel limiting layer in the luminescent layer. The orthographic projection of the light extraction layer on the light emitting layer is located in the light emitting region and the non-light emitting region. The light correction layer is positioned on a side of the light extraction layer remote from the light emitting layer, and is configured to correct light deflected from the light emitting region to an adjacent non-light emitting region, thereby reducing the extent of light deflection. Specifically, the light correction layer has a light correction structure, and the light correction layer corrects the deflected light by using the light correction structure, so that the uniformity of the brightness of the display panel can be improved, and the display effects of the display panel and the display device can be improved. In addition, the orthographic projection of the light correcting structure on the light emitting layer is positioned in the non-light emitting area so as to avoid the error correction of the light correcting structure on the non-deflected light.
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The display device provided in the embodiment of the present application will be described below with reference to fig. 1 to 9.
The embodiment provides a display device including a display panel. The display device can be a mobile or fixed terminal with a display panel, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, an ultra-personal computer, a navigator and the like.
The display panel may be an Organic Light-Emitting Diode (OLED) display panel, a Micro Light-Emitting Diode (Micro Light Emitting Diode LED or μled) display panel, or a liquid crystal (Liquid Crystal Display LCD) display panel.
The display panel provided in the embodiment of the present application will be described below.
The present embodiment provides a display panel that can be applied to the above display device.
The display panel may include a substrate that may provide support for other structural film layers. The substrate may be a rigid substrate, specifically a glass substrate or other rigid substrate. In other examples, the substrate may be a flexible substrate, and the material of the substrate may include at least one of Polyimide (PI), polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, and polyethersulfone.
As shown in fig. 1 and 2, the display panel may include a light emitting layer 100, and the light emitting layer 100 may be disposed at one side of a substrate. The light emitting layer 100 includes a light emitting side and a backlight side disposed opposite to each other. One surface of the light-emitting side is used for displaying a picture. The backlight side is the opposite side of the light emitting side in the thickness direction of the light emitting layer 100.
The light emitting layer 100 includes a light emitting region 100a and a non-light emitting region 100b adjacent to each other, the light emitting region 100a corresponds to the pixel unit 110, and the pixel unit 110 is a unit that emits light. The pixel units 110 are plural, and the plural pixel units 110 are arranged at intervals. The non-light emitting regions 100b are provided between adjacent light emitting regions 100a, and the non-light emitting regions 100b correspond to the pixel defining layers. I.e., the light emitting layer 100 includes a plurality of pixel units 110 therein and a pixel defining layer between adjacent pixel units 110.
The pixel unit 110 may include red, green, and blue pixels, and the pixel unit 110 may further include white pixels.
As shown in fig. 2, the display panel may include a light extraction layer 300, the light extraction layer 300 being positioned at the light emitting side of the light emitting layer 100, the light extraction layer 300 being used to increase the light extraction rate, increase the proportion of emitted light, increase the brightness of the display panel, and reduce the power consumption of the display panel.
The orthographic projection of the light extraction layer 300 on the light emitting layer 100 is located in the light emitting region 100a and the non-light emitting region 100b, so that the coverage area of the light extraction layer 300 is large, and the light extraction rate of each position of the display panel can be improved.
The light extraction layer 300 is described below.
The term "total reflection" refers to a phenomenon in which, when light is incident on the interface between the optically dense medium (i.e., the medium has a large refractive index of light) and the optically thin medium (i.e., the medium has a small refractive index of light), all the light is reflected back into the optically dense medium and cannot be emitted to the optically thin medium.
As shown in fig. 3, the light emitting layer 100 is provided with an encapsulation layer 200 on a side facing the light extraction layer 300. The light extraction layer 300 includes a first body layer 310, where the first body layer 310 may be used to increase the light extraction efficiency, for example, the refractive index of the first body layer 310 is greater than or equal to the refractive index of the encapsulation layer 200, so that total reflection of light incident on the first body layer 310 from the encapsulation layer 200 can be avoided, and a portion of the light cannot be emitted and is lost inside the structural film of the display panel.
Illustratively, the encapsulation layer 200 may employ a thin film encapsulation technique (Thin Film Encapsulation, abbreviated as TFE), and the TFE encapsulation layer 200 may include a plurality of encapsulation sub-film layers, which may be an inorganic layer/organic layer/inorganic layer overlapping film layer structure. The inorganic layer is used for effectively blocking water and oxygen, and the organic layer is used for buffering stress in the inorganic layer. The refractive index of the encapsulation sub-film layer closest to the light extraction layer 300 is equal to or less than that of the first body layer 310, so that total reflection of light from the encapsulation sub-film layer to the first body layer 310 can be avoided.
The light extraction structure 320 is disposed in the first body layer 310, and the refractive index of the first body layer 310 is greater than that of the light extraction structure 320, so that when light is emitted from the first body layer 310 to the light extraction structure 320, total reflection is easier to occur, so that loss caused by the light entering into the light extraction structure 320 is reduced, light is emitted directly from the first body layer 310 to a user, light extraction efficiency is improved, brightness of the display panel is improved, and power consumption of the display panel is reduced.
Specifically, the orthographic projection of the light extraction structure 320 on the light emitting layer 100 is located in the non-light emitting region 100b, so as to avoid the light extraction structure 320 from blocking the light emitted from the light emitting region 100a and affecting the light extraction rate.
As shown in fig. 3, the light extraction structure 320 has a light reflection surface 330 near the light emitting region 100a side, the light reflection surface 330 is an interface of the light extraction structure 320 adjacent to the first body layer 310, and the light reflection surface 330 extends in the thickness direction of the display panel. Wherein, the light reflection surface 330 is inclined, and the end of the light reflection surface 330 away from the light emitting layer 100 is inclined toward the center of the light extraction structure 320. The inclined arrangement of the light reflecting surface 330 can increase the area of the light reflecting surface 330 compared to the vertical arrangement, in the case where the thickness of the light extraction structure 320 is the same, so that the light reflecting surface 330 can reflect more light. In addition, the front view angle of the display panel may be increased by reasonably setting the inclination angle of the light reflection surface 330 so that light is emitted in a direction perpendicular to the display panel.
Along the light emitting direction, the cross-sectional area of the light extraction structure 320 parallel to the light emitting layer 100 becomes smaller, and the structure is simpler, so that the difficulty in preparation can be reduced.
The surface of the light extraction structure 320 facing away from the light emitting layer 100 is a plane, which has a simpler structure and can reduce the difficulty in preparing the light extraction structure 320.
At least part of the first body layer 310 is located at a side of the light extraction structure 320 away from the light emitting layer 100, and the first body layer 310 is thicker, so that the first body layer 310 plays a role in planarization, and in addition, the first body layer 310 can play a role in protecting the light extraction structure 320.
As shown in fig. 3, the display panel may include a light correction layer 400, the light correction layer 400 being located at a side of the light extraction layer 300 remote from the light emitting layer 100. The pixel unit 110 generates light, which is sequentially incident on the light extraction layer 300 and the light correction layer 400. The light correction layer 400 is used to correct the deflected light to reduce the degree of light deflection. The light correction layer 400 has a light correction structure 410, and the light correction layer 400 corrects the deflected light using the light correction structure 410, so that the uniformity of the brightness of the display panel can be improved to improve the display effect of the display panel and the display device. In addition, the orthographic projection of the light-correcting structure 410 on the light-emitting layer 100 is located in the non-light-emitting region 100b, so as to avoid the miscorrection of the non-deflected light by the light-correcting structure 410.
Embodiments of light correction structure 410 are described in detail below.
As shown in fig. 3, the light correcting layer 400 includes a second body layer 440, and the second body layer 440 may have a groove 420 therein, the groove 420 being recessed toward the center of the light correcting layer 400 in the thickness direction. The inside of the groove 420 is filled with the light-transmitting member 430, and the second body layer 440 corresponding to the groove 420 and the light-transmitting member 430 together form the light-correcting structure 410. The second body layer 440 corresponding to the groove 420 means: the second body layer 440 is disposed opposite to the groove 420 in the thickness direction. The orthographic projection of the portion of the second body layer 440 onto the light emitting layer 100 at least partially overlaps the orthographic projection of the recess 420 onto the light emitting layer 100.
In the first embodiment, as shown in fig. 3 and 4, the notch of the groove 420 is located on the side of the light correction layer 400 facing the light emitting layer 100.
Wherein, the surface of the light correction layer 400 facing away from the light emitting layer 100 is a plane, so that the light correction layer 400 has better flatness, and the plane structure is simpler, and the preparation difficulty of the light correction layer 400 can be reduced
In a second embodiment, as shown in fig. 5, the notch of the groove 420 is located on the side of the light correction layer 400 facing away from the light emitting layer 100.
The surface of the light correction layer 400 facing the light emitting layer 100 is a plane, and the plane structure is simpler, so that the preparation difficulty of the light correction layer 400 can be reduced.
In the third embodiment, as shown in fig. 6, the grooves 420 include a first groove 421 and a second groove 422, the notch of the first groove 421 is located on the side of the light-correcting layer 400 facing the light-emitting layer 100, the notch of the second groove 422 is located on the side of the light-correcting layer 400 facing away from the light-emitting layer 100, i.e., the first groove 421 and the second groove 422 are respectively provided on the opposite sides of the light-correcting layer 400 in the thickness direction
Wherein, the front projection of the first groove 421 on the light emitting layer 100 and the front projection of the second groove 422 on the light emitting layer 100 at least partially overlap, so that light is easier to irradiate to the first groove 421 and the second groove 422 simultaneously.
Specifically, light is irradiated from the light emitting layer 100 to the light correcting structure 410, and refraction occurs multiple times in the light correcting structure 410, thereby realizing light correction.
It should be noted that "correcting" means that the deviation angle of the deflected light is reduced, so that the outgoing angle of the light is closer to or the same as the predetermined angle of the light (the angle at which no deflection occurs).
The shape of the groove 420 is explained below.
As shown in fig. 5 to 7, the groove depth of the groove 420 gradually increases in the direction from the edge of the groove 420 to the center of the groove 420, i.e., the groove depth of the groove 420 increases and decreases in the extending direction of the groove 420, thereby enabling the inner wall surface having the groove 420 to achieve light correction.
In some examples, as shown in fig. 5, the inner wall surface of the groove 420 may be a curved surface, for example, the inner wall surface of the groove 420 may be a spherical surface. When the inner wall surface of the groove 420 is spherical, the second body layer 440 having the groove 420 will form a plano-concave lens (fig. 5) or a biconcave lens (fig. 6), which are collectively called a concave lens, which is a lens having an astigmatic effect.
The "astigmatism effect" means that, as shown in fig. 8, light is emitted in a direction away from the main optical axis Y after passing through the concave lens. For example, the light is deflected when it is emitted from the light extraction layer 300, enters the concave lens, passes through the concave lens, and is emitted in a direction away from the main optical axis Y of the concave lens, so that the light emission direction is corrected, thereby improving the uniformity of the brightness of the display panel.
The correcting angle of the biconcave lens is larger than that of the plano-concave lens, and the biconcave lens is suitable for correcting light with large polarization angle. And the structure of the plano-concave lens is simpler than that of the biconcave lens, and the preparation difficulty is lower.
Taking the second body layer 440 as an example to form a biconcave lens, the light-transmitting member 430 is filled in the groove 420, and since the refractive index of the light-transmitting member 430 is smaller than that of the second body layer 440, the biconcave lens and the light-transmitting member 430 can still be similar to the biconcave lens, that is, the light correction structure 410 is similar to the biconcave lens, and has a light scattering effect, so that light correction can be performed.
In some examples, as shown in fig. 9, the inner wall surface of the groove 420 may include a first inner wall surface 423 and a second inner wall surface 424 that are connected, the first inner wall surface 423 and the second inner wall surface 424 being inclined planes. The plane structure is simpler, and the preparation difficulty can be reduced.
Light is incident from the light extraction layer 300 into the light correction structure 410, and is refracted multiple times at the light correction structure 410, thereby realizing light correction in a direction similar to that of a concave lens.
The material of the light-transmitting member 430 in the first groove 421 and the material of the light-transmitting member 430 in the second groove 422 may be the same or different.
Illustratively, the light-transmitting member 430 is matched with the groove 420 in shape and size, the connection strength between the light-transmitting member 430 and the biconcave lens is high, the light-transmitting member 430 can better enhance the strength of the biconcave lens, and the supporting effect on the biconcave lens is good.
Illustratively, the surface of the light-transmitting member 430 on the side of the notch near the groove 420 is flush with the notch, so that the surface of the light-correcting layer 400 on the side of the notch near the groove 420 has a good flatness.
The installation position of the second body layer 440 is described below.
In some examples, as shown in fig. 3, the orthographic projection of the second body layer 440 on the light emitting layer 100 covers the light emitting region 100a and the non-light emitting region 100b, and the second body layer 440 may form a complete film layer, where the structural stability of the complete film layer is higher, and the flatness of the complete film layer is better. In addition, all the light on the display panel is emitted to the outside through the second body layer 440, and the uniformity of the emitted light is good.
In other examples, as shown in fig. 4, the orthographic projection of the second body layer 440 on the light emitting layer 100 covers only the non-light emitting region 100b, and the orthographic projection of the second body layer 440 on the light emitting layer 100 does not overlap with the light emitting region 100 a. In this way, the second body layer 440 is not disposed on the side of the light emitting layer 100 of the light emitting region 100a facing away from the substrate, which increases the transmittance of the display panel at the light emitting region 100a, and can avoid the loss of light passing through the second body layer 440 at the location (the transmittance of the film layer is limited, and the light can be lost through the film layer).
In some embodiments, the refractive index of the second body layer 440 is not smaller than that of the first body layer 310, so that the total reflection of light from the first body layer 310 to the second body layer 440 can be avoided, which affects the light extraction efficiency.
In some embodiments, the front projection of the light extraction structure 320 on the light emitting layer 100 is located in the front projection of the light correction structure 410 on the light emitting layer 100, so as to avoid the situation that the deflected light cannot enter the light correction structure 410.
In some embodiments, the materials of the light extraction structure 320 and the light transmissive member 430 may be the same or different. When the light extraction structure 320 and the light transmission member 430 are the same, the difficulty in manufacturing can be reduced. For example, the light extraction structure 320 and the light transmissive member 430 may be made of silicon oxide, polymethyl methacrylate (also called acryl), polystyrene, or the like.
The first body layer 310 and the second body layer 440 may include titanium oxide (TiO 2 ) Tantalum pentoxide (Ta) 2 O 5 ) And zirconium dioxide (ZrO) 2 ) Any one or more of the following.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (13)
1. A display panel characterized by comprising a light emitting layer, a light extracting layer and a light correcting layer, wherein the light extracting layer is positioned on the light emitting side of the light emitting layer, and the light correcting layer is positioned on the side of the light extracting layer away from the light emitting layer;
the light-emitting layer comprises a light-emitting area and a non-light-emitting area which are adjacent;
the light extraction layer comprises a first main body layer and a light extraction structure positioned in the first main body layer, the refractive index of the first main body layer is larger than that of the light extraction structure, and the orthographic projection of the light extraction structure on the light-emitting layer is positioned in the non-light-emitting area; the light extraction layer is used for improving the light extraction rate;
the light correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and orthographic projection of the light correction structures on the light emitting layer is positioned in the non-light emitting area; the light correction layer is used for correcting light deflected from the light-emitting area to the adjacent non-light-emitting area, so that the degree of light deflection is reduced;
the orthographic projection of one side of the light extraction structure, which is far away from the light emitting layer, on the light emitting layer is positioned in the orthographic projection of the light correction structure on the light emitting layer;
the light correction structure comprises a part of second main body layer and a light transmission piece, wherein the part of second main body layer is provided with a groove, the light transmission piece is filled in the groove, the light transmission piece is matched with the groove in shape and size, and the groove is recessed towards the thickness direction of the light correction layer.
2. The display panel according to claim 1, wherein a notch of the groove is located on a side of the light correction layer facing the light emitting layer, and a side of the light correction layer facing away from the light emitting layer is a plane;
or, the notch of the groove is positioned at one side of the light correction layer, which is away from the light emitting layer, and one side of the light correction layer, which is towards the light emitting layer, is a plane;
or, the grooves comprise a first groove and a second groove, the notch of the first groove and the notch of the second groove are respectively positioned on two opposite sides of the light correction layer along the thickness direction, and the orthographic projection of the first groove on the light emitting layer and the orthographic projection of the second groove on the light emitting layer are at least partially overlapped.
3. The display panel according to claim 2, wherein a groove depth of the groove gradually increases along an edge of the groove to a center of the groove.
4. A display panel according to claim 3, wherein the inner wall surface of the recess is a cambered surface.
5. The display panel of claim 2, wherein the light transmissive member has a refractive index less than a refractive index of the second body layer.
6. The display panel of claim 5, wherein a side of the light transmissive member adjacent the recess slot is flush with the slot.
7. The display panel of any one of claims 1-6, wherein an orthographic projection of the second body layer on the light emitting layer covers the light emitting region and the non-light emitting region.
8. The display panel of any one of claims 1-6, wherein an orthographic projection of the second body layer on the light emitting layer covers only the non-light emitting region.
9. The display panel according to any one of claims 1 to 6, wherein the light extraction structure includes a light reflection surface between a side close to the light emitting layer and a side far from the light emitting layer, and a cross section of the light extraction structure parallel to the light emitting layer becomes gradually smaller in a light emitting direction.
10. The display panel of claim 9, wherein a side of the light extraction structure facing away from the light emitting layer is planar.
11. The display panel of claim 9, wherein a portion of the first body layer is located on a side of the light extraction structure remote from the light emitting layer.
12. The display panel according to any one of claims 1 to 6, wherein a refractive index of the second host layer is not smaller than a refractive index of the first host layer;
and/or, a packaging layer is arranged on one side of the light emitting layer, which faces the light extraction layer, and the refractive index of the packaging layer is not larger than that of the first main body layer.
13. A display device comprising a display panel as claimed in any one of the preceding claims 1-12.
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| CN115132947A (en) * | 2022-06-29 | 2022-09-30 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
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