CN111025742B - Display panel and display device - Google Patents

Abstract

The embodiment of the invention discloses a display panel and a display device. Wherein, the display panel includes: the display device comprises a display substrate, a pixel array and a pixel array, wherein the display substrate is provided with a display area and a non-display area arranged around the display area, and comprises edge sub-pixels which are positioned in the edge area of the display area and are adjacent to the non-display area; the light guide structure is positioned on the light-emitting side of the display substrate, at least part of the light guide structure is positioned in the edge area and extends to the non-display area from the edge area, in the direction vertical to the display substrate, the light guide structure covers at least part of the area of the edge sub-pixel, and the light guide structure is used for guiding out the light emitted by the covered edge sub-pixel from one side face, far away from the center of the display substrate, of the light guide structure; and the light absorption structure is positioned on one side of the light guide structure far away from the center of the display substrate and is used for absorbing light guided out by the light guide structure. The technical scheme provided by the embodiment of the invention can avoid the phenomenon that the edge color edge appears on the display panel.

Description

Display panel and display device

Technical Field

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

Background

With the continuous development of display technologies, the application of display panels is more and more extensive. Display panels are increasingly in demand, for example, on small-sized electronic devices such as cell phones and wearable electronics. At the same time, however, the display performance requirements of the display panel are also increasing.

When the screen is watched at a close distance, the display panel has a color edge phenomenon. Such a color fringing phenomenon affects the display effect of the display panel. In the display device of the existing wearable equipment product, the color edge problem can be even generally existed. The existence of the color-edge problem can reduce the comfort level of the user experience of the corresponding electronic product.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which can avoid the phenomenon of edge color edge of the display panel.

In a first aspect, an embodiment of the present invention provides a display panel, including:

the display device comprises a display substrate, a first substrate and a second substrate, wherein the display substrate is provided with a display area and a non-display area arranged around the display area, and comprises edge sub-pixels which are positioned in the edge area of the display area and adjacent to the non-display area;

the light guide structure is positioned on the light emitting side of the display substrate, at least part of the light guide structure is positioned in the edge area and extends to the non-display area from the edge area, the light guide structure covers at least part of area of the edge sub-pixels in the direction vertical to the display substrate, and the light guide structure is used for guiding out the light emitted by the covered edge sub-pixels from one side surface of the light guide structure, which is far away from the center of the display substrate;

and the light absorption structure is positioned on one side of the light guide structure, which is far away from the center of the display substrate, and is used for absorbing light guided out by the light guide structure.

Further, the edge sub-pixel comprises a first edge sub-pixel and a second edge sub-pixel, the first edge sub-pixel is arranged to protrude towards the non-display area relative to the second edge sub-pixel, and in a direction perpendicular to the display substrate, the light guide structure covers a portion of the first edge sub-pixel protruding towards the non-display area.

Furthermore, the display panel further comprises a packaging layer covering the display area, and the packaging layer is located between the display substrate and the light guide structure.

Further, the light absorbing structure is located on the surface of the light guiding structure far away from the center side of the display substrate.

Further, the light guide structure comprises a total reflection type light guide structure or a volume grating type light guide structure.

Furthermore, the light guide structure comprises at least two dielectric layers, the refractive indexes of any two adjacent dielectric layers are different, and the included angle between the interface of the two adjacent dielectric layers and the display substrate is an acute angle or an obtuse angle.

Furthermore, the light guide structure comprises a first medium layer and a second medium layer, wherein the first medium layer covers at least partial region of the edge sub-pixel; the surface of the first medium layer, which is far away from the display substrate, is an inclined surface, the inclined surface inclines from the edge of the display area to the direction close to the display substrate, the second medium layer is positioned on the inclined surface, and the refractive index of the first medium layer is greater than that of the second medium layer;

preferably, an included angle between the inclined plane and the surface of the first medium layer close to the display substrate is greater than or equal to a critical angle of total reflection of light emitted by the edge sub-pixel covered by the light guide structure at an interface of the first medium layer and the second medium layer;

preferably, the material of the first dielectric layer comprises photoresist; the material of the second dielectric layer comprises silicon oxide.

Furthermore, the light guide structure comprises a plurality of dielectric layers which are sequentially stacked, and the interface of any two adjacent dielectric layers inclines from the edge of the display area to the direction far away from the display substrate;

preferably, the light guide structure comprises third medium layers and fourth medium layers which are alternately arranged;

preferably, in any two adjacent dielectric layers, an included angle between the bottom of the dielectric layer close to the center of the display substrate and an interface is greater than or equal to 45 degrees and less than or equal to 75 degrees, and the bottom of the dielectric layer is the side of the dielectric layer close to the display substrate;

preferably, the light guiding structure comprises a heavy complex acid salt gelatin body grating.

Furthermore, the sum of the thicknesses of the two adjacent dielectric layers is D, the thickness of the dielectric layer with the smaller refractive index in the two adjacent dielectric layers is D1,

D1/D is greater than or equal to 0.5 and less than or equal to 0.7;

and/or in two adjacent dielectric layers, the included angle between the bottom of the dielectric layer close to the center of the display substrate and the interface is alpha,

d/sin alpha is greater than or equal to 1 micrometer and less than or equal to 10 micrometers.

In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in any embodiment of the present invention.

The display panel in the technical scheme of the embodiment of the invention comprises: the display device comprises a display substrate, a first substrate and a second substrate, wherein the display substrate is provided with a display area and a non-display area arranged around the display area, and comprises edge sub-pixels which are positioned in the edge area of the display area and adjacent to the non-display area; the light guide structure is positioned on the light-emitting side of the display substrate, at least part of the light guide structure is positioned in the edge area and extends to the non-display area from the edge area, in the direction vertical to the display substrate, the light guide structure covers at least part of the area of the edge sub-pixel, and the light guide structure is used for guiding out the light emitted by the covered edge sub-pixel from one side face, far away from the center of the display substrate, of the light guide structure; the light absorbing structure is located on one side of the light guide structure far away from the center of the display substrate, is used for absorbing light guided out by the light guide structure, conducts light emitted by the sub-pixels in the edge area of the display area to the direction towards the non-display area through the light guide structure, and is absorbed by the light absorbing structure so as to weaken the brightness of the sub-pixels in the edge area of the display area and weaken the phenomenon of edge color.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic top view of a display substrate according to an embodiment of the disclosure;

fig. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the disclosure;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

fig. 5 is a schematic partial cross-sectional view of a display panel according to an embodiment of the invention;

fig. 6 is a schematic cross-sectional view illustrating a light guide structure according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The embodiment of the invention provides a display panel. Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention. Fig. 2 is a schematic top view of a display substrate according to an embodiment of the invention. The display panel includes: a display substrate 10, a light guiding structure 20 and a light absorbing structure 30.

The display substrate 10 has a display area 11 and a non-display area 12 disposed around the display area 11, and the display substrate 10 includes an edge sub-pixel 13 located in an edge area 111 of the display area 11 and adjacent to the non-display area 12. The light guide structure 20 is located on the light emitting side of the display substrate 10, at least a portion of the light guide structure is located in the edge region 111 of the display region 11 and extends from the edge region 111 of the display region 11 to the non-display region 12, in a direction perpendicular to the display substrate 10, the light guide structure 20 covers at least a portion of the edge sub-pixel 13, and the light guide structure 20 is configured to guide out light emitted by the covered edge sub-pixel 13 from a side of the light guide structure 20 away from the center of the display substrate 10. The light absorbing structure 30 is located on a side of the light guiding structure 20 away from the center of the display substrate 10, and the light absorbing structure 30 is used for absorbing light guided out by the light guiding structure 20.

The display panel may include a liquid crystal display panel or an organic light emitting display panel. The display substrate 10 may include subpixels of multiple colors, for example, a red subpixel R, a green subpixel G, and a blue subpixel B, which are arranged according to a predetermined rule, so that adjacent subpixels of three colors may serve as a pixel unit, and the subpixels of three colors in one pixel unit may be mixed to form any color by controlling the brightness of light emitted by the subpixels of three colors, so that the display panel displays a desired picture. The light guiding structure 20 can change the propagation direction of the light of the sub-pixels 13 in the edge region 111 of the display region 11, so that the light of the sub-pixels 13 in the edge region 111 is deflected by a large angle, and is absorbed after being emitted to the light absorbing structure 30. Optionally, the light guide structure 20 includes a total reflection type light guide structure or a volume grating type light guide structure, and the light guide structure 20 may include an element such as a prism. The light absorbing structure 30 may include at least one of: black organic glue, black ink, and the like.

Fig. 1 is a schematic cross-sectional structure view of the display panel along the direction AB in fig. 2, and referring to fig. 1 and fig. 2, if the sub-pixels 13 in the edge region 111 of the display region 11 only include sub-pixels of one color or two colors, for example, as shown in fig. 2, the sub-pixels in the initial row only include red sub-pixels R, i.e., the initial row of red sub-pixels R protrudes, and the sub-pixels in the final row only include green sub-pixels G, i.e., the final row of green sub-pixels G protrudes, an edge color edge phenomenon may occur, and by providing the light guide structure 20, the light emitting path of the light of the sub-pixels 13 in the edge region 111 of the display region 11 is changed, the light is guided to the light absorption structure 30 and then absorbed, so that the luminance of the sub-pixels in the edge region 111 of the display region 11 is reduced, and the edge color edge phenomenon is weakened.

It should be noted that if fig. 2 is rotated by 90 degrees clockwise or counterclockwise, or the sub-pixels are arranged according to other preset rules, so that the initial row of sub-pixels only includes the red sub-pixel R, that is, the initial row of red sub-pixels R protrudes, and the end row of sub-pixels only includes the green sub-pixel G, that is, the end row of green sub-pixels G protrudes, an edge color edge phenomenon may occur, and by setting the light guide structure 20, the light emitting paths of the light rays of the initial row of the edge region 111 of the display region 11 and the end row of sub-pixels 13 are changed, and the light is guided to the light absorption structure 30 and then absorbed, so that the luminance of the sub-pixels of the edge region 111 of the display region 11 is reduced, and the edge color edge phenomenon is reduced.

The display panel in the technical scheme of the embodiment comprises: the display device comprises a display substrate, a pixel array and a pixel array, wherein the display substrate is provided with a display area and a non-display area arranged around the display area, and comprises edge sub-pixels which are positioned in the edge area of the display area and are adjacent to the non-display area; the light guide structure is positioned on the light emitting side of the display substrate, at least part of the light guide structure is positioned in the edge area and extends to the non-display area from the edge area, the light guide structure covers at least part of area of the edge sub-pixels in the direction vertical to the display substrate, and the light guide structure is used for guiding out the light emitted by the covered edge sub-pixels from one side surface of the light guide structure, which is far away from the center of the display substrate; the light absorbing structure is located on one side of the light guide structure far away from the center of the display substrate, is used for absorbing light guided out by the light guide structure, conducts light emitted by the sub-pixels in the edge area of the display area to the direction towards the non-display area through the light guide structure, and is absorbed by the light absorbing structure so as to weaken the brightness of the sub-pixels in the edge area of the display area and weaken the phenomenon of edge color.

Fig. 3 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, and in addition to the above embodiment, with reference to fig. 2 and fig. 3, the edge sub-pixel 13 includes a first edge sub-pixel 131 and a second edge sub-pixel 132, the first edge sub-pixel 131 is disposed to protrude toward the non-display area 12 relative to the second edge sub-pixel 132, and the light guide structure 20 covers a portion 112 of the first edge sub-pixel 131 protruding toward the non-display area 12 in a direction perpendicular to the display substrate 10.

In the initial row shown in fig. 2, the first edge sub-pixel 131 may be a red sub-pixel R, the second edge sub-pixel 132 may be a blue sub-pixel B, and the red sub-pixel R is disposed to protrude toward the non-display region 12 relative to the blue sub-pixel B, that is, the red sub-pixel R is close to the non-display region 12 relative to the blue sub-pixel B, so that the light guide structure 20 covers the portion 112 of the red sub-pixel R protruding toward the non-display region 12, which can weaken the edge red color edge phenomenon. Fig. 2 exemplarily shows that at the end row, the first edge sub-pixel 131 may be a green sub-pixel G, the second edge sub-pixel 132 may be a blue sub-pixel B, and the green sub-pixel G is disposed to protrude toward the non-display region 12 relative to the blue sub-pixel B, that is, the green sub-pixel G is close to the non-display region 12 relative to the blue sub-pixel B, so that the edge green color edge phenomenon may be weakened by covering the portion 112 of the green sub-pixel G protruding toward the non-display region 12 with the light guide structure 20. The light guide structure 20 only covers the portion 112 of the first edge sub-pixel 131 protruding toward the non-display region 12, so as to reduce the coverage area of the light guide structure 20 as much as possible and weaken the edge color fringing phenomenon.

Optionally, on the basis of the above embodiment, with continuing reference to fig. 3, the display panel further includes an encapsulation layer 103 covering the display region 11, and the encapsulation layer 103 is located between the display substrate 10 and the light guide structure 20.

Optionally, the display substrate 10 may include an array substrate 101, and a pixel layer 102 on the array substrate 101. The encapsulation layer 103 is located on a side of the pixel layer 102 away from the array substrate 101.

The array substrate 101 may include a thin film transistor layer and the like. The pixel layer 102 may include an organic light emitting diode film layer, etc. The encapsulation layer 103 may include a thin film encapsulation layer or a glass Frit (Frit) encapsulation layer, which prevents moisture or oxygen from entering and causing damage to the organic light emitting diode film. The thin film encapsulation layer may include inorganic film layers and organic film layers alternately stacked.

Alternatively, on the basis of the above embodiment, with continuing reference to fig. 1 or fig. 3, the light absorbing structure 30 is located on the surface of the light guiding structure 20 on the side away from the center of the display substrate 10. For example, a light absorbing material such as black organic glue and black ink may be coated on a surface of the light guide structure 20 away from the center of the display substrate 10, so as to facilitate absorption of light guided out by the light guide structure 20.

Optionally, on the basis of the foregoing embodiment, the light guide structure includes a total reflection type light guide structure or a volume grating type light guide structure.

Optionally, on the basis of the foregoing embodiment, with continuing reference to fig. 3, the light guide structure 20 includes at least two dielectric layers, for example, a first dielectric layer 21 and a second dielectric layer 22 in fig. 3, refractive indexes of any two adjacent dielectric layers are different, and an included angle between an interface of the two adjacent dielectric layers and the display substrate is an acute angle or an obtuse angle. The light of the edge sub-pixel 13 is guided to be absorbed after being transmitted to the light absorption structure 30 by total reflection or refraction at the interface of at least two dielectric layers, so as to weaken the edge color edge phenomenon.

The embodiment of the invention provides another display panel. Fig. 4 is a partially enlarged view of fig. 3. On the basis of the above embodiment, the light guide structure 20 includes a first medium layer 21 and a second medium layer 22, where the first medium layer 21 covers at least a partial region of the edge sub-pixel 13; the surface of the first medium layer 21 far away from the display substrate 10 is an inclined surface 211, the inclined surface 211 inclines from the edge of the display region 11 to the direction close to the display substrate 10, the second medium layer 22 is located on the inclined surface 211, and the refractive index of the first medium layer 21 is larger than that of the second medium layer 22.

Fig. 4 is a partially enlarged schematic view of fig. 3, and fig. 4 exemplarily illustrates a case where the light guide structure 20 is a total reflection type light guide structure. The light emitted from the edge sub-pixel 13 is vertically incident to the first medium layer 21, and then the incident light is totally reflected at the interface between the first medium layer 21 and the second medium layer 22, and the reflected light will be incident to the light absorption structure 30 and absorbed. Optionally, the material of the first dielectric layer 21 includes photoresist, and for example, the first dielectric layer 21 having the inclined surface 211 may be formed through a half-tone mask process. Optionally, the material of the second dielectric layer 22 includes silicon oxide.

Optionally, on the basis of the foregoing embodiment, with reference to fig. 4, an included angle β between the inclined surface 211 and the surface of the first medium layer 21 close to the display substrate 10 is greater than or equal to a critical angle at which light emitted by the edge sub-pixel 13 covered by the light guide structure 20 is totally reflected at an interface between the first medium layer 21 and the second medium layer 22.

The emitting direction of the light emitted by the edge sub-pixel 13 is perpendicular to the upper surface of the display substrate 10, and the normal 212 of the interface between the first medium layer 21 and the second medium layer 22 is perpendicular to the inclined surface 211, so that the included angle β between the inclined surface 211 and the upper surface of the display substrate 10 is equal to the incident angle γ when the light is reflected on the interface between the first medium layer 21 and the second medium layer 22. If the incident angle γ is greater than or equal to the critical angle, i.e. the included angle β is greater than or equal to the critical angle, the light emitted from the edge sub-pixel 13 will be totally reflected at the interface between the first dielectric layer 21 and the second dielectric layer 22. The included angle beta is greater than or equal to the critical angle and less than 90 degrees.

Optionally, on the basis of the foregoing embodiment, with reference to fig. 3, the display panel further includes a transparent filling layer 40 located on one side of the display substrate 10 and covering the light guiding structure 20, and a side of the transparent filling layer 40 away from the display substrate 10 is a plane, so as to flatten a surface of the display panel.

Fig. 5 is a schematic partial cross-sectional structure diagram of a display panel according to an embodiment of the present invention. On the basis of the above embodiment, the light guide structure 20 includes a plurality of dielectric layers sequentially stacked, refractive indexes of any two adjacent dielectric layers are different, and an interface of any two adjacent dielectric layers is inclined from an edge of the display area 11 to a direction away from the display substrate 10.

Fig. 5 exemplarily shows a case where the light guide structure 20 is a volume grating type light guide structure. The light emitted from the edge sub-pixel 13 is vertically incident into one of the medium layers, and then refracted to enter the adjacent medium layer, and the light is gradually deflected by refraction until the light is emitted to the light absorption structure 30 to be absorbed.

Alternatively, on the basis of the above embodiment, with continued reference to fig. 5, the light guide structure 20 includes third medium layers 23 and fourth medium layers 24 alternately arranged.

Wherein, optionally, the light guiding structure 20 comprises a heavy complex acid salt gelatin body grating. Fig. 6 is a schematic cross-sectional structure diagram of a light guide structure according to an embodiment of the present invention. The incident direction of ultraviolet light inclined irradiates the heavy complex acid salt gelatin, and irradiated areas and non-irradiated areas are alternately arranged, wherein the refractive indexes of the areas irradiated by the ultraviolet light and the areas not irradiated by the ultraviolet light are different, so that a multilayer dielectric layer with the refractive index alternately changing is formed. By adjusting the irradiation angle of the ultraviolet light, the included angle α between the interface of any two adjacent dielectric layers and the display substrate 10 can be adjusted. The sizes of D1 and D were adjusted by adjusting the sizes of the illuminated area and the non-illuminated area.

Optionally, on the basis of the foregoing embodiment, as shown in fig. 2 and fig. 5, in any two adjacent dielectric layers, an included angle α between the bottom of the dielectric layer close to the center O of the display substrate 10 and the interface is greater than or equal to 45 degrees and less than or equal to 75 degrees, and the bottom of the dielectric layer is a side of the dielectric layer close to the display substrate 10.

The included angle α cannot be too large, so that light emitted by the edge sub-pixel 13 is prevented from being incident perpendicularly into one of the dielectric layers and being totally reflected, and the light cannot be deflected to the adjacent dielectric layer, so that the light cannot be guided to the light absorption structure 30. The included angle α cannot be too large, otherwise the thickness of the light guide structure 20 in the direction perpendicular to the display substrate needs to be increased, resulting in an increase in product volume. The included angle alpha cannot be too small, otherwise the normal lines of two adjacent dielectric layers approach the direction vertical to the display substrate, so that the deflection of light rays is not easy to realize.

Optionally, with reference to fig. 5, the sum of the thicknesses of two adjacent dielectric layers is D, the thickness of the dielectric layer with the smaller refractive index in the two adjacent dielectric layers is D1, and D1/D is greater than or equal to 0.5 and less than or equal to 0.7.

Where D1/D may be referred to as a duty cycle. The smaller the thickness of the dielectric layer with the smaller refractive index is, the larger the thickness of the dielectric layer with the larger refractive index is, the larger the deflection degree of the light is, and the thickness of the light guide structure 20 in the direction perpendicular to the display substrate is favorably reduced.

Optionally, on the basis of the foregoing embodiment, with reference to fig. 2 and 5, the sum of thicknesses of two adjacent dielectric layers is D, an included angle between the bottom of the dielectric layer close to the center O of the display substrate 10 and the interface in the two adjacent dielectric layers is α, and D/sin α is greater than or equal to 1 micron and less than or equal to 10 microns.

As shown in fig. 5, L1 is the length of the intersection line of the section of the third dielectric layer 23 along the AB direction and the display substrate 10, and L is the length of the intersection line of the section of the adjacent third dielectric layer 23 and fourth dielectric layer 24 along the AB direction and the display substrate 10, where L1 ═ D1/sin α, L ═ D/sin α, and D1/D ═ L1/L. A third dielectric layer 23 and a fourth dielectric layer 24 adjacent to each other are used as one period. One period can deflect light rays by an angular amount, the more periods the light path passes, the greater the degree of deflection. However, the period cannot be too long, otherwise, the light guide structure 20 is too long, the frame of the display substrate is increased, and the narrow frame is not easily realized.

The embodiment of the invention provides a display device. Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention. The display device 1 includes a display panel provided in any embodiment of the present invention.

The display device 1 may be one of a mobile phone, a tablet computer, electronic paper, and an electronic photo frame. The display device provided by the embodiment of the present invention includes the display panel in the above embodiments, and therefore, the display device provided by the embodiment of the present invention also has the beneficial effects described in the above embodiments, and details are not repeated herein.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (15)

1. A display panel, comprising:

the display device comprises a display substrate, a pixel array and a pixel array, wherein the display substrate is provided with a display area and a non-display area arranged around the display area, and comprises edge sub-pixels which are positioned in the edge area of the display area and are adjacent to the non-display area;

the light guide structure is positioned on the light emitting side of the display substrate, at least part of the light guide structure is positioned in the edge area and extends to the non-display area from the edge area, the light guide structure covers at least part of the edge sub-pixels in the direction perpendicular to the display substrate, and the light guide structure is used for guiding out the light emitted by the covered edge sub-pixels from one side surface of the light guide structure, which is far away from the center of the display substrate;

and the light absorption structure is positioned on one side of the light guide structure far away from the center of the display substrate and is used for absorbing light guided out by the light guide structure.

2. The display panel according to claim 1, wherein the edge sub-pixels comprise a first edge sub-pixel and a second edge sub-pixel, the first edge sub-pixel is disposed to protrude toward the non-display region relative to the second edge sub-pixel, and the light guide structure covers a portion of the first edge sub-pixel protruding toward the non-display region in a direction perpendicular to the display substrate.

3. The display panel of claim 1, further comprising an encapsulation layer covering the display area, the encapsulation layer being located between the display substrate and the light guide structure.

4. The display panel of claim 1, wherein the light absorbing structure is located on a surface of the light guiding structure on a side away from a center of the display substrate.

5. A display panel as claimed in any one of claims 1-4 characterized in that the light guiding structure comprises a total reflective light guiding structure or a volume grating light guiding structure.

6. The display panel according to claim 5, wherein the light guide structure comprises at least two dielectric layers, the refractive indexes of any two adjacent dielectric layers are different, and an included angle between an interface of the two adjacent dielectric layers and the display substrate is an acute angle or an obtuse angle.

7. The display panel according to claim 6, wherein the light guide structure comprises a first dielectric layer and a second dielectric layer, wherein the first dielectric layer covers at least a partial region of the edge sub-pixel; the display panel comprises a display substrate, a first dielectric layer, a second dielectric layer and a display substrate, wherein one surface of the first dielectric layer, which is far away from the display substrate, is an inclined surface, the inclined surface inclines from the edge of a display area to the direction close to the display substrate, the second dielectric layer is positioned on the inclined surface, and the refractive index of the first dielectric layer is larger than that of the second dielectric layer.

8. The display panel according to claim 7, wherein an included angle between the inclined surface and the surface of the first medium layer close to the display substrate is greater than or equal to a critical angle at which light emitted from an edge sub-pixel covered by the light guide structure is totally reflected at an interface between the first medium layer and the second medium layer.

9. The display panel according to claim 7, wherein a material of the first dielectric layer comprises a photoresist; the material of the second dielectric layer comprises silicon oxide.

10. The display panel according to claim 6, wherein the light guide structure comprises a plurality of dielectric layers sequentially stacked, and an interface between any two adjacent dielectric layers is inclined from an edge of the display area to a direction away from the display substrate.

11. The display panel according to claim 10, wherein the light guide structure comprises a third dielectric layer and a fourth dielectric layer alternately arranged.

12. The display panel according to claim 10, wherein in any two adjacent dielectric layers, an included angle between the bottom of the dielectric layer close to the center of the display substrate and an interface is greater than or equal to 45 degrees and less than or equal to 75 degrees, and the bottom of the dielectric layer is the side of the dielectric layer close to the display substrate.

13. The display panel of claim 10, wherein the light guiding structure comprises a heavy complex acid salt gelatin grating.

14. The display panel according to claim 10, wherein the sum of the thicknesses of the two adjacent dielectric layers is D, the thickness of the dielectric layer with the smaller refractive index in the two adjacent dielectric layers is D1,

D1/D is greater than or equal to 0.5 and less than or equal to 0.7;

and/or in two adjacent dielectric layers, the included angle between the bottom of the dielectric layer close to the center of the display substrate and the interface is alpha,

d/sin alpha is greater than or equal to 1 micrometer and less than or equal to 10 micrometers.

15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.

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