CN114284454A - Display panel and display device - Google Patents
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- CN114284454A CN114284454A CN202111595610.7A CN202111595610A CN114284454A CN 114284454 A CN114284454 A CN 114284454A CN 202111595610 A CN202111595610 A CN 202111595610A CN 114284454 A CN114284454 A CN 114284454A
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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 taking-out layer and a light correcting layer, the light taking-out layer is positioned on the light emitting side of the light emitting layer, and the light correcting layer is positioned on one side, far away from the light emitting layer, of the light taking-out 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 correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and orthographic projections of the light correction structures on the light emitting layer are positioned in the non-light emitting area. The light correction layer corrects the deflected light using the light correction structure, so that the uniformity of the brightness of the display panel can be improved. Therefore, the display panel and the display device provided by the application can improve the uniformity of the brightness of the display panel, so that the display effect of the display panel and the display device is improved.
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, fast response, flexibility, ultra-lightness, thinness, low cost and the like, and is considered to have a great application prospect in the technical field of display.
In the related art, a Light Extraction microstructure (HLEMS for short) is disposed on a Light emitting surface of the display panel, and the Light Extraction microstructure utilizes a total reflection principle, so that Light loss can be reduced and brightness of the display panel can be improved.
However, the display panel having the light extraction microstructure is prone to have a problem of uneven brightness, which affects the display effect.
Disclosure of Invention
In view of at least one of the above technical problems, embodiments of the present application provide a display panel and a display device, which can improve the uniformity of the brightness of the display panel, thereby improving the display effect of the display panel and the display device.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
a first aspect of an embodiment of the present application provides a display panel, including a light emitting layer, a light extraction layer, and a light correction layer, where the light extraction layer is located on a light exit side of the light emitting layer, and the light correction layer is located on a side of the light extraction 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 correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and orthographic projections of the light correction structures on the light emitting layer are positioned in the non-light emitting area.
The display panel that this application embodiment provided, display panel includes luminescent layer, light extraction layer and light correction layer, and the light extraction layer is located the light-emitting side of luminescent layer, and the light extraction layer is used for improving light extraction rate, and the luminescent layer includes adjacent light emitting area and non-light emitting area, and the pixel unit in the luminescent layer is corresponded to in the light emitting area, and the non-light emitting area corresponds the pixel limit layer in the luminescent layer. The orthographic projection of the light extraction layer on the light emitting layer is positioned in the light emitting region and the non-light emitting region. The light correcting layer is positioned on one side of the light extraction layer far away from the light emitting layer and 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. 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 region is substantially consistent, the brightness uniformity of the display panel can be improved, and the display effect of the display panel and the display device can be improved. In addition, the orthographic projection of the light correction structure on the light emitting layer is positioned in the non-light emitting area, so that the light correction structure can be prevented from generating error correction on non-deflected light.
In one possible implementation manner, the light correction structure comprises a part of the second main body layer and a light-transmitting piece, wherein the part of the second main body layer is provided with a groove, the light-transmitting piece is filled in the groove, the shape and the size of the light-transmitting piece are matched with those of the groove, and the groove is sunken towards the thickness direction of the light correction layer;
the notch of the groove is positioned on one side of the light correction layer facing the light-emitting layer, and one side of the light correction layer departing from the light-emitting layer is a plane;
or the notch of the groove is positioned on one side of the light correction layer, which is far away from the light-emitting layer, and one side of the light correction layer, which is far towards the light-emitting layer, is a plane;
or the grooves comprise a first groove and a second groove, the notches of the first groove and 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 is at least partially overlapped with the orthographic projection of the second groove on the light-emitting layer.
Like this, the mode of setting up 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 gradually increases from the edge of the groove to the center of the groove;
preferably, the inner wall surface of the groove is a cambered surface.
Like this, the structure of recess is comparatively simple, and the preparation degree of difficulty is lower.
In one possible implementation, the refractive index of the light-transmissive member is less than the refractive index of the second body layer;
preferably, the side of the light-transmitting member adjacent the notch of the recess is flush with the notch.
Thus, the flatness of one side of the light-transmitting member close to the notch of the groove can be ensured.
In one possible implementation, an orthographic projection of the second host layer on the light emitting layer covers the light emitting region and the non-light emitting region.
Therefore, the second main body layer can form a complete film layer, the structural stability of the complete film layer is high, and the flatness of the complete film layer is good.
In one possible implementation, an orthographic projection of the second host layer on the light emitting layer covers only the non-light emitting region.
Thus, the screen transmittance of the display panel at the light emitting region is increased, and the loss of light passing through the second main body layer can be avoided
In one possible implementation, the light extraction structure comprises a light reflection surface between a side close to the light emitting layer and a side far away from the light emitting layer, and the section of the light extraction structure parallel to the light emitting layer is gradually reduced along the light emitting direction;
preferably, the side of the light extraction structure facing away from the light-emitting layer is a plane;
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 by providing the light reflecting surface at an inclination, so that the light reflecting surface can reflect more light.
In one possible implementation, the refractive index of the second body layer is not less than the refractive index of the first body layer;
and/or an encapsulation layer is arranged on one side of the light-emitting layer facing the light extraction 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 from the encapsulation layer to the first body layer can be avoided.
In a possible implementation, the orthographic projection of the light extraction structure on the light emitting layer on the side thereof facing away from the light emitting layer is located within the orthographic projection of the light correcting structure on the light emitting layer.
This prevents the deflected light from not being incident on the light correction structure. A second aspect of embodiments of the present application provides a display device including the display panel in the first aspect described above.
The display device that this application embodiment provided, display panel include display panel, and display panel includes luminescent layer, light extraction layer and light correction layer, and the light extraction layer is located the light-emitting side of luminescent layer, and the light extraction layer is used for improving light extraction rate, and the luminescent layer includes adjacent luminous zone and non-luminous zone, and the luminous zone corresponds the pixel unit in the luminescent layer, and the non-luminous zone corresponds the pixel limit layer in the luminescent layer. The orthographic projection of the light extraction layer on the light emitting layer is positioned in the light emitting region and the non-light emitting region. The light correcting layer is positioned on one side of the light extraction layer far away from the light emitting layer and 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. Specifically, the light correction layer has a light correction structure, and the light correction layer corrects the deflected light using the light correction structure, so that the uniformity of the brightness of the display panel can be improved, and the display effect of the display panel and the display device can be improved. In addition, the orthographic projection of the light correction structure on the light emitting layer is positioned in the non-light emitting area, so that the light correction structure can be prevented from generating error correction on non-deflected light.
The construction of the present application and other objects and advantages thereof will be more apparent from the following 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 needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a light extraction layer provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another light extraction layer provided in this embodiment of the present application;
FIG. 3 is a schematic structural diagram of a light correction layer provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another optical correction layer provided in the embodiments of the present application;
FIG. 5 is a schematic structural diagram of a plano-concave lens provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a biconcave lens provided in an embodiment of the present application;
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 diagram of a divergent light path of light passing through a biconcave lens according to an embodiment of the present disclosure;
fig. 9 is a schematic view of an optical path of light corrected by an optical correction structure according to an embodiment of the present application.
Description of reference numerals:
100: a light emitting layer;
100 a: a light emitting region;
100 b: a non-light emitting region;
110: a pixel unit;
200: a packaging layer;
300: a light extraction layer;
310: a first body layer;
320: a light extraction structure;
330: a light reflecting surface;
400: a light correction layer;
410: a light-correcting 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 transmissive 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 a light exit 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 to reduce light incident from the main body layer into the light extraction structure, thereby reducing loss of light occurring in the light extraction structure, improving light extraction efficiency, further improving luminance 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 in which the pixel unit is located. The light can be emitted in a direction (or other specific angle) perpendicular to the display panel under the action of the light extraction layer, that is, the light is emitted out of the display panel perpendicularly (or other specific angle) from the pixel unit, so that the front brightness of the display panel is high.
Due to the manufacturing process error, the sizes of the light extraction structures at different positions of the display panel have errors, which causes deviation of the emergent angles of the light emitted by part of the light emitting layers. For example, when light is irradiated to a light extraction structure of a normal size (the structure shown as a in fig. 1), the light will be emitted in a direction perpendicular to the display panel (or other specific angle).
However, when light is irradiated to the light extraction structure with errors (the structure shown in B in fig. 1), light may be deflected in a direction from the pixel unit to the adjacent pixel definition layer (as shown by a dashed line frame B in fig. 1), and under the same observation angle, the brightness of the deflected pixel unit is different from that of the pixel unit which is not deflected, so that the uniformity of light output from the display panel is reduced, and the problem of uneven brightness of the display panel occurs, which affects the display effect of the display panel and the display device.
Here, the above-mentioned "deflection" may mean that light is emitted at a predetermined angle deviated by a light extraction structure or other structures, and the light is deviated by a pixel unit toward an adjacent pixel defining layer.
In view of the foregoing problems, embodiments of the present application provide a display panel and a display device, including a light emitting layer, a light extraction layer and a light correction layer, where the light extraction layer is located on a light emitting side of the light emitting layer, and the light extraction layer is used to improve a light extraction rate, and the light emitting layer includes an adjacent light emitting region and a non-light emitting region, the light emitting region corresponds to a pixel unit in the light emitting layer, and the non-light emitting region corresponds to a pixel defining layer in the light emitting layer. The orthographic projection of the light extraction layer on the light emitting layer is positioned in the light emitting region and the non-light emitting region. The light correcting layer is positioned on one side of the light extraction layer far away from the light emitting layer and 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. Specifically, the light correction layer has a light correction structure, and the light correction layer corrects the deflected light using the light correction structure, so that the uniformity of the brightness of the display panel can be improved, and the display effect of the display panel and the display device can be improved. In addition, the orthographic projection of the light correction structure on the light emitting layer is positioned in the non-light emitting area, so that the light correction structure can be prevented from generating error correction on non-deflected light.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but 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 application.
The display device provided in the embodiment of the present application will be described below with reference to fig. 1 to 9.
The present 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 personal computer, a television, a display, a notebook computer, a digital photo frame, a super 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 LED or μ LED) Display panel, or a Liquid Crystal Display (LCD) Display panel.
The display panel provided in the embodiments of the present application will be described below.
The present embodiment provides a display panel, which can be applied to the display device.
The display panel may include a substrate, which may provide support for other structural film layers. The substrate may be a rigid substrate, and specifically may be a glass substrate or other rigid substrates. 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 the 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 pictures. The backlight side is the opposite side to 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 for emitting light. The number of the pixel units 110 is multiple, and the pixel units 110 are arranged at intervals. The non-light emitting regions 100b are provided between the adjacent light emitting regions 100a, and the non-light emitting regions 100b correspond to the pixel defining layers. That is, the light emitting layer 100 includes a plurality of pixel units 110 and a pixel defining layer between adjacent pixel units 110.
The pixel unit 110 may include a red pixel, a green pixel, and a blue pixel, and the pixel unit 110 may further include a white pixel.
As shown in fig. 2, the display panel may include a light extraction layer 300, the light extraction layer 300 is located on the light emitting side of the light emitting layer 100, and the light extraction layer 300 is used to improve the light extraction rate, increase the proportion of emitted light, improve the brightness of the display panel, and reduce the power consumption of the display panel.
In this case, the orthographic projection of the light extraction layer 300 on the light emitting layer 100 is positioned in the light emitting region 100a and the non-light emitting region 100b, so that the light extraction layer 300 has a large coverage area, and the light extraction efficiency at each position of the display panel can be improved.
The light extraction layer 300 will be described below.
The term "total reflection" refers to a phenomenon in which light is totally reflected back into the optically denser medium and does not exit into the optically thinner medium when the light strikes an interface of the optically thinner medium (i.e., the light has a large refractive index in the medium) and the light strikes the interface of the optically thinner medium (i.e., the light has a small refractive index in the 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, and 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 package layer 200, so as to prevent the light from being incident on the first body layer 310 from the package layer 200 and totally reflected, thereby preventing a portion of the light from being lost inside the structural film layer of the display panel.
For example, the Encapsulation layer 200 may use Thin Film Encapsulation Technology (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 the stress in the inorganic layer. The refractive index of the package sub-film layer closest to the light extraction layer 300 is equal to or less than the refractive index of the first body layer 310, so that total reflection of light from the package 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 more likely to occur, loss of light entering the light extraction structure 320 is reduced, light is emitted directly from the first body layer 310 to a user, the light extraction rate is improved, the brightness of the display panel is improved, and the 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 that the light extraction structure 320 is prevented 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, 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 along the thickness direction of the display panel. The light reflecting surface 330 is obliquely disposed, and an end of the light reflecting surface 330 away from the light emitting layer 100 is obliquely disposed toward the center of the light extraction structure 320. The light reflecting surface 330 is obliquely disposed, compared to the perpendicular disposition, and the area of the light reflecting surface 330 can be increased so that the light reflecting surface 330 can reflect more light when the thickness of the light extraction structure 320 is the same. In addition, the angle of inclination of the light reflecting surface 330 can be set properly, so that light can be emitted in a direction perpendicular to the display panel, thereby increasing the front viewing angle of 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 gradually decreases, the structure is simpler, and the difficulty in manufacturing can be reduced.
The surface of the light extraction structure 320 facing away from the light-emitting layer 100 is a plane, which is relatively simple in structure and can reduce the difficulty in manufacturing the light extraction structure 320.
At least a portion of the first body layer 310 is located on a side of the light extraction structure 320 away from the light emitting layer 100, and the first body layer 310 is disposed to be thicker, so that the first body layer 310 can perform a planarization function, and in addition, the first body layer 310 can also perform a certain protection function on 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 on a side of the light extraction layer 300 away from the light emitting layer 100. The pixel unit 110 generates light, which is sequentially incident into the light extraction layer 300 and the light correction layer 400. The light correction layer 400 serves to correct the deflected light to reduce the degree of light deflection. The light correction layer 400 has the 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 on the non-light emitting region 100b to avoid the light correcting structure 410 from generating the miscorrection on the non-deflected light.
The following describes an embodiment of the light correction structure 410 in detail.
As shown in fig. 3, the light correction layer 400 includes a second body layer 440, and the second body layer 440 may have a groove 420 therein, the groove 420 being depressed toward the center in the thickness direction of the light correction layer 400. The recess 420 is filled with a light transmissive member 430, and the second body layer 440 corresponding to the recess 420 and the light transmissive 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 opposite to the groove 420 in the thickness direction. The orthographic projection of the part of the second body layer 440 on the light emitting layer 100 at least partially overlaps with the orthographic projection of the groove 420 on the light emitting layer 100.
In the first embodiment, as shown in fig. 3 and 4, the notches of the groove 420 are located on the surface of the light correction layer 400 facing the side of the light emitting layer 100.
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, the planar structure is simpler, and the difficulty in preparing the light correction layer 400 can be reduced
In a second embodiment, as shown in fig. 5, the notches of the recess 420 are located on the side of the light correcting 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, which is relatively simple in structure and can reduce the difficulty in preparing the light correction layer 400.
In the third embodiment, as shown in fig. 6, the groove 420 includes a first groove 421 and a second groove 422, the notch of the first groove 421 is located on the surface of the light correction layer 400 facing the light-emitting layer 100, and the notch of the second groove 422 is located on the surface of the light correction layer 400 facing away from the light-emitting layer 100, that is, the first groove 421 and the second groove 422 are respectively disposed on the two surfaces of the light correction layer 400 opposite to each other in the thickness direction
The orthographic projection of the first groove 421 on the light-emitting layer 100 at least partially overlaps with the orthographic projection of the second groove 422 on the light-emitting layer 100, so that light can be easily irradiated to the first groove 421 and the second groove 422 at the same time.
Specifically, light is irradiated from the light emitting layer 100 to the light correcting structure 410, and multiple refractions occur in the light correcting structure 410, thereby achieving light correction.
It should be noted that "correct" means that the deviation angle of the deflected light ray is reduced so that the exit angle of the light ray is closer to or the same as the predetermined angle of the light ray (angle at which no deflection occurs).
The shape of the groove 420 will be explained below.
As shown in fig. 5 to 7, the groove depth of the groove 420 gradually increases in a direction from the edge of the groove 420 to the center of the groove 420, that is, the groove depth of the groove 420 increases first and then decreases in the extending direction of the groove 420, so that the inner wall surface having the groove 420 can perform light correction.
In some examples, as shown in fig. 5, an 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 referred to as a concave lens, which is a lens having an astigmatism effect.
By "light scattering effect" is meant that, as shown in fig. 8, light will emerge in a direction away from the main optical axis Y after passing through the concave lens. For example, when light exits from the light extraction layer 300, the light is deflected and enters the concave lens, and after passing through the concave lens, the light exits in a direction away from the main optical axis Y of the concave lens, thereby correcting the exit direction of the light and improving the uniformity of the brightness of the display panel.
The correction angle of the biconcave lens is larger than that of the plano-concave lens, and the biconcave lens is suitable for correcting light with a large deflection 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 example of forming the biconcave lens by the second body layer 440, the groove 420 is filled with the light-transmitting member 430, and since the refractive index of the light-transmitting member 430 is smaller than that of the second body layer 440, the corresponding biconcave lens and the light-transmitting member 430 can still be similar to a biconcave lens, i.e., the light-correcting structure 410 is similar to a biconcave lens, which has an astigmatism effect and can perform a light-correcting function.
In some examples, as shown in fig. 9, inner wall surfaces of recess 420 may include a first inner wall surface 423 and a second inner wall surface 424 that are connected, with first inner wall surface 423 and second inner wall surface 424 being inclined planes. The plane structure is simple, and the preparation difficulty can be reduced.
When light enters the light correcting structure 410 from the light extraction layer 300, multiple refractions occur in the light correcting structure 410, thereby achieving light correction in a direction similar to that of a concave lens.
The material of the light-transmitting member 430 in the first recess 421 and the material of the light-transmitting member 430 in the second recess 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 support effect on the biconcave lens is good.
Illustratively, the surface of the light-transmitting member 430 on the side close to the notch of the groove 420 is flush with the notch, so that the surface of the light correction layer 400 on the side close to the notch of the groove 420 has better flatness.
The position where the second body layer 440 is disposed will be 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, which has high structural stability and good flatness. In addition, all light on the display panel exits to the outside through the second body layer 440, and uniformity of the exiting light is good.
In other examples, as shown in fig. 4, the orthographic projection of the second host layer 440 on the light emitting layer 100 only covers the non-light emitting region 100b, and the orthographic projection of the second host layer 440 on the light emitting layer 100 does not overlap with the light emitting region 100 a. Thus, the second body layer 440 is not disposed on the side of the light emitting layer 100 of the light emitting region 100a away from the substrate, so that the screen transmittance of the display panel at the light emitting region 100a is increased, and the loss of light passing through the second body layer 440 (the light transmittance of the film layer is limited, and the light passing through the film layer is lost) can be avoided.
In some embodiments, the refractive index of the second body layer 440 is not less than the refractive index of the first body layer 310, so that total reflection of light from the first body layer 310 to the second body layer 440 can be avoided, which may affect the light extraction efficiency.
In some embodiments, an orthographic projection of the surface of the light extraction structure 320 away from the light emitting layer 100 on the light emitting layer 100 is located within an orthographic projection of the light correcting structure 410 on the light emitting layer 100, so as to avoid a situation that the deflected light cannot enter the light correcting structure 410.
In some embodiments, the light extraction structure 320 and the light transmissive member 430 may be made of the same or different materials. When the light extraction structure 320 and the light transmissive member 430 are made of the same material, the difficulty of 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 acrylic), or polystyrene.
Titanium oxide (TiO) may be included in the first and second body layers 310 and 4402) Tantalum pentoxide (Ta)2O5) And zirconium dioxide (ZrO)2) Any one or more of them.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions 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 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 application.
Claims (10)
1. A display panel is characterized by comprising a light emitting layer, a light extraction layer and a light correction layer, wherein the light extraction layer is positioned on the light emitting side of the light emitting layer, and the light correction layer is positioned on one side, far away from the light emitting layer, of the light extraction layer;
the light emitting layer comprises a light emitting region and a non-light emitting region 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 correction layer comprises a second main body layer and a plurality of light correction structures positioned in the second main body layer, and the orthographic projection of the light correction structures on the light emitting layer is positioned in the non-light emitting area.
2. The display panel according to claim 1, wherein the light correcting structure comprises a partial second body layer and a light transmissive member, the partial second body layer has a groove, the light transmissive member is filled in the groove, the light transmissive member is adapted to the shape and size of the groove, and the groove is recessed in a thickness direction of the light correcting layer;
the notch of the groove is positioned on one side of the light correction layer facing the light-emitting layer, and one side of the light correction layer departing from the light-emitting layer is a plane;
or the notch of the groove is positioned on one side of the light correction layer, which is far away from the light-emitting layer, and one side of the light correction layer, which is far towards the light-emitting layer, is a plane;
or, the grooves include a first groove and a second groove, the notches of the first groove and the second groove are respectively located on two opposite sides of the light correction layer in the thickness direction, and the orthographic projection of the first groove on the light emitting layer is at least partially overlapped with the orthographic projection of the second groove on the light emitting layer.
3. The display panel according to claim 2, wherein a groove depth of the groove gradually increases from an edge of the groove to a center of the groove;
preferably, the inner wall surface of the groove is an arc surface.
4. The display panel according to claim 2, wherein a refractive index of the light-transmitting member is smaller than a refractive index of the second body layer;
preferably, the side of the light-transmitting member close to the notch of the groove is flush with the notch.
5. The display panel according to any one of claims 1 to 4, wherein an orthogonal projection of the second host layer on the light emitting layer covers the light emitting region and the non-light emitting region.
6. The display panel according to any one of claims 1 to 4, wherein an orthographic projection of the second host layer on the light emitting layer covers only the non-light emitting region.
7. The display panel according to any one of claims 1 to 4, 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 is gradually reduced in a light exit direction;
preferably, a side of the light extraction structure facing away from the light emitting layer is a plane;
preferably, a portion of the first host layer is located on a side of the light extraction structure away from the light emitting layer.
8. The display panel according to any one of claims 1 to 4, wherein a refractive index of the second body layer is not less than a refractive index of the first body layer;
and/or an encapsulation layer is arranged on one side of the light-emitting layer facing the light extraction layer, and the refractive index of the encapsulation layer is not greater than that of the first main body layer.
9. A display panel as claimed in any one of the claims 1-4 characterized in that an orthographic projection of the light extraction structure on the light emitting layer at a side remote from the light emitting layer is located within an orthographic projection of the light correcting structure on the light emitting layer.
10. A display device comprising the display panel according to any one of claims 1 to 9.
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