Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes: a display area, a non-display area at least partially surrounding the display area, a substrate, and a light-emitting layer. The light-emitting layer includes a light-emitting element and an auxiliary light-emitting element. The light-emitting element located at the edge of the display area is adjacent to the auxiliary light-emitting element. When the auxiliary light-emitting element is in a bright state, it performs light mixing with the light-emitting element located at the edge of the display area, improving the brightness at the edge of the display area and optimizing the brightness uniformity between the center and the edge of the display area.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and more particularly, to a display panel and a display device. Background Art

[0002] With the rapid development of technology, mobile phones or wearable devices have become indispensable tools in people's daily lives and work. People are also increasingly concerned about the usage experience of mobile phones or wearable devices, especially the display effect of their display screens. Micro light-emitting diodes and mini light-emitting diodes have the characteristics of small size, high integration, and self-luminescence. Displaying by arranging an array of micro light-emitting diodes or mini light-emitting diodes has become a mainstream display technology. In the prior art, when the display area of the display screen is in a bright state, the non-display area is in a dark state, making the edge position of the display area darker, which affects the display effect.

[0003] Therefore, it is an urgent problem to provide a display panel and a display device that can improve the darkness at the edge position when the display area emits light. Summary of the Invention

[0004] In view of this, the present invention provides a display panel and a display device.

[0005] On the one hand, the display panel provided by the present invention includes a display area and at least a part of a non-display area surrounding the display area. The display panel further includes:

[0006] A substrate;

[0007] A light-emitting layer, located on one side of the substrate, includes a plurality of light-emitting elements located in the display area and a plurality of auxiliary light-emitting elements located in the non-display area. The auxiliary light-emitting elements mix light with the adjacent light-emitting elements.

[0008] In another aspect, the display device provided by the present invention includes the above-mentioned display panel.

[0009] Compared with the prior art, the display panel and the display device provided by the present invention achieve at least the following beneficial effects:

[0010] In the display panel and the display device provided by the present invention, the light-emitting layer includes a plurality of light-emitting elements located in the display area and a plurality of auxiliary light-emitting elements located in the non-display area. Some of the light-emitting elements are located at the edge of the display area. The light-emitting elements located at the edge of the display area are closest to the non-display area, that is, the light-emitting elements located at the edge of the display area are adjacent to the auxiliary light-emitting elements. When the auxiliary light-emitting elements are in a bright state, they mix light with the light-emitting elements located at the edge of the display area, improving the brightness at the edge of the display area and optimizing the brightness uniformity between the center and the edge of the display area.

[0011] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-described technical effects simultaneously.

[0012] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0014] Figure 1 is a schematic plan view of a display panel in the prior art;

[0015] Figure 2 is a schematic plan view of a display panel provided by the present invention;

[0016] Figure 3 is Figure 2 a sectional view taken along line M-M' in

[0017] Figure 4 is Figure 2 another sectional view taken along line M-M' in

[0018] Figure 5 is Figure 2 another sectional view taken along line M-M' in

[0019] Figure 6 is Figure 2 yet another sectional view taken along line M-M' in

[0020] Figure 7 is Figure 2 yet another sectional view taken along line M-M' in

[0021] Figure 8 is Figure 2 yet another sectional view taken along line M-M' in

[0022] Figure 9 is a schematic plan view of another display panel provided by the present invention;

[0023] Figure 10 is a schematic plan view of yet another display panel provided by the present invention;

[0024] Figure 11 is Figure 10 a sectional view taken along line N-N' in

[0025] Figure 12 is Figure 10 another sectional view taken along line N-N' in

[0026] Figure 13 It is a schematic plan view of a display device provided by the present invention. Detailed implementation manners

[0027] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention or its application or use.

[0029] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification.

[0030] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] In order to solve the problem of relatively low brightness at the edge of the display area, the inventor conducted the following research on the display panel in the related art:

[0033] Figure 1 It is a schematic plan view of a display panel 000 in the prior art. The display panel 000 includes a display area AA' and a non-display area BB' at least partially surrounding the display area AA'. The light-emitting elements 00 are located in the display area AA'. In Figure 1 only the array arrangement of the light-emitting elements 00 is schematically shown. The light-emitting elements 00 include a light-emitting element 01, a light-emitting element 02, and a light-emitting element 03 arranged in sequence along the row direction X. The light-emitting element 01 is located at the edge of the display area AA' and is closest to the non-display area BB'. When the display panel 000 is in the bright state, the light-emitting element 02 can mix light with both the light-emitting element 01 and the light-emitting element 03. When the light-emitting element 01 at the edge of the display area AA' can only mix light with the light-emitting element 02, it causes the problem that the brightness of the edge position of the display area AA' close to the non-display area BB' is lower than the brightness of the middle position of the display area AA'. It can be understood that, in order to clearly explain the problems found by the inventor during the research process, the above content is analyzed using a single light-emitting element, but in actual products, there may be multiple columns of light-emitting elements with low edge brightness.

[0034] In view of this, the present invention provides a display panel and a display device. Specific embodiments of the display panel and the display device provided by the present invention will be described in detail below.

[0035] Referring to Figure 2 and Figure 3 , Figure 2 FIG. Figure 3 is Figure 2 a schematic plan view of a display panel 100 provided by the present invention,

[0036] In this embodiment, the provided display panel 100 includes a display area AA and at least a partial non-display area BB surrounding the display area AA. The display panel 100 further includes: a substrate 1; a light-emitting layer 2 located on one side of the substrate 1, including a plurality of light-emitting elements 3 located in the display area AA and a plurality of auxiliary light-emitting elements 4 located in the non-display area BB. The auxiliary light-emitting elements 4 mix light with the adjacent light-emitting elements 3.

[0037] It should be noted that Figure 2 only shows that the orthographic projection of the display area AA on the substrate 1 is rectangular. Of course, the orthographic projection of the display area AA on the substrate 1 can also be circular, or an irregular shape, etc. In Figure 2 the non-display area BB is disposed around the display area AA, Figure 2 only shows the case where the non-display area BB completely surrounds the display area AA. It can also be that the non-display area BB partially surrounds the display area AA, which is not specifically limited here. The non-display area BB includes a first non-display area BB1 and a second non-display area BB2. Optionally, a plurality of auxiliary light-emitting elements 4 can also be partially located in the first non-display area BB1 and partially located in the second non-display area BB2, or a plurality of auxiliary light-emitting elements 4 are sequentially arranged in the non-display area BB surrounding the display area AA on all sides, and is not limited thereto. Figure 2 In

[0038] the number and arrangement of the auxiliary light-emitting elements 4 are only for illustration and can be adjusted according to actual needs. The present application does not specifically limit this. The light-emitting elements 3 and the auxiliary light-emitting elements 4 are preferably micro light-emitting diodes or mini light-emitting diodes.

[0039] Compared with the prior art, in the display panel 100 provided in this embodiment, the light-emitting layer 2 includes a plurality of light-emitting elements 3 located in the display area AA and a plurality of auxiliary light-emitting elements 4 located in the non-display area BB. The auxiliary light-emitting elements 4 can mix light with the adjacent light-emitting elements 3. Some of the light-emitting elements 3 are located at the edge of the display area AA. The light-emitting elements 3 located at the edge of the display area AA are closest to the non-display area BB, that is, the light-emitting elements 3 located at the edge of the display area AA are adjacent to the auxiliary light-emitting elements 4. When the auxiliary light-emitting elements 4 are in the bright state, they mix light with the light-emitting elements 3 located at the edge of the display area AA, improving the brightness at the edge of the display area AA and enhancing the brightness uniformity between the center and the edge of the display area AA, thus improving the display performance.

[0040] In some alternative embodiments, referring to Figure 2 and Figure 4 , Figure 4 is Figure 2 Another cross-sectional view in the M-M' direction in

[0041] It should be noted that Figure 4 only shows the case where the light-emitting surface 5 of the auxiliary light-emitting element 4 is inclined with respect to the plane where the substrate 1 is located. Optionally, the height of the pins of the auxiliary light-emitting element 4 can be set differently to make the light-emitting surface 5 of the auxiliary light-emitting element 4 inclined, or other structures can be set to pad up one end of the auxiliary light-emitting element 4 to make the light-emitting surface 5 of the auxiliary light-emitting element 4 inclined, but it is not limited to this. In Figure 4 the driving transistor, buffer layer 11, planarization layer 12, and interlayer insulating layer are also shown. The substrate 1, buffer layer 11, and interlayer insulating layer are not filled with patterns. The light L1 on the light-emitting surface 5 of the auxiliary light-emitting element 4 in the figure is inclined toward the display area AA.

[0042] It can be understood that, since the distance between the end of the light-emitting surface 5 of the auxiliary light-emitting element 4 close to the display area AA and the substrate 1 is not equal to the distance between the end of the light-emitting surface 5 of the auxiliary light-emitting element 4 far from the display area AA and the substrate 1, that is, the light-emitting surface 5 of the auxiliary light-emitting element 4 is inclined with respect to the substrate 1, and the light-emitting surface 5 of the auxiliary light-emitting element 4 is inclined toward the display area AA after tilting. Therefore, the amount of light incident on the display area AA along the direction in which the light-emitting surface 5 of the auxiliary light-emitting element 4 points to the display area AA is greatly increased, which is used to mix light with the light-emitting elements 3 at the edge of the display area AA, improving the light mixing efficiency, and further enhancing the brightness at the edge of the display area AA, and improving the problem that the brightness at the edge position of the display area AA close to the non-display area BB is lower than the brightness at the middle position of the display area AA.

[0043] In some optional embodiments, combined with Figure 2 and Figure 5 , Figure 5 yes Figure 2 Another cross-sectional view taken along the M-M' direction, the display panel 100 provided in this embodiment further includes a raised portion 6; along the direction perpendicular to the plane where the base substrate 1 is located, the raised portion 6 at least partially overlaps with the auxiliary light-emitting element 4; along the direction perpendicular to the plane where the base substrate 1 is located, the thickness of the raised portion 6 at one end close to the display area AA is less than the thickness of the raised portion 6 at one end away from the display area AA.

[0044] It should be noted that Figure 5 It is only schematically shown that the raised portion 6 is located between the base substrate 1 and the array layer 10, and the cross-section of the raised portion 6 along the direction perpendicular to the plane where the base substrate 1 is located is a triangle. Optionally, the raised portion 6 can be located between the array layer 10 and the light-emitting layer 2, or between any two adjacent interlayer insulating layers in the array layer 10, etc. In this embodiment, no specific limitation is made, and the cross-section of the raised portion 6 along the direction perpendicular to the plane where the base substrate 1 is located can also be a trapezoid, a polygon or even an irregular shape.

[0045] It can be understood that a raised portion 6 is provided in the non-display area BB, and the raised portion 6 is inclined toward the display area AA on the side away from the base substrate 1. The thickness of the portion of the array layer 10 located on the side of the raised portion 6 away from the base substrate 1 is equal to the thickness of the portion of the array layer 10 located in the display area AA, so that the side of the array layer 10 located on the raised portion 6 away from the base substrate 1 is an inclined surface, and the inclination angle of the inclined surface is the same as the inclination angle of the raised portion 6 away from the base substrate 1. Similarly, since the light-emitting layer 2 and the array layer 10 are provided on the raised layer 6, the light-emitting layer 2 or other film layers are located on the side of the raised portion 6 away from the base substrate 1 is also an inclined surface, so the light-emitting surface 5 of the auxiliary light-emitting element 4 is also an inclined surface, and the light from the light-emitting surface 5 of the auxiliary light-emitting element 4 is directed toward the display area AA, the light mixing efficiency is improved, and the edge brightness of the display area AA can be further improved, and the problem that the brightness of the edge position of the display area AA close to the non-display area BB is lower than the brightness of the middle position of the display area AA is improved.

[0046] In some optional embodiments, referring to Figure 2 and Figure 6 , Figure 6 yes Figure 2 In another cross-sectional view taken along the M-M' direction, the display panel 100 provided in this embodiment further includes a functional layer 7; the functional layer 7 includes a first area 8 and a second area 9 at least partially surrounding the first area 8, along a direction perpendicular to the plane of the substrate 1, the first area 8 at least partially overlaps with the display area AA, and the second area 9 is provided with a raised portion 6.

[0047] It should be noted that Figure 6 only shows that the functional layer 7 is located between the array layer 10 and the light-emitting layer 2. Optionally, the functional layer 7 can also be located between the substrate 1 and the array layer 10. Since the second region 9 of the functional layer 7 is provided with a raised portion 6, the side of the raised portion 6 away from the substrate 1 is inclined toward the display region AA. The film layer on the side of the raised portion 6 away from the substrate 1 does not change or approximately does not change in thickness during the subsequent manufacturing process. Therefore, the film layer on the side of the raised portion 6 away from the substrate 1 has an inclined surface, and the inclination angle is the same as the inclination angle of the side of the raised portion 6 away from the substrate 1. Optionally, the functional layer 7 is a film layer conventionally provided when manufacturing the display panel 100. Specifically, the functional layer 7 can be formed by manufacturing a planar functional layer 7, and by performing operations such as grooving or exposure on the first region 8 of the functional layer 7, the second region 9 is formed into a raised portion 6 with an inclined surface, or by directly forming a raised portion 6 with an inclined surface on the second region 9 of the functional layer 7 through methods such as exposure or imprinting. The material of the functional layer 7 can be an organic material or an inorganic material. Since organic materials can be used to manufacture thicker film layers in the display panel 100, an organic material is preferably used, but no specific limitation is made in this embodiment.

[0048] It can be understood that by raising the non-display region BB through the functional layer 7, the light-emitting surface 5 of the auxiliary light-emitting element 4 provided in the non-display region BB is inclined toward the display region AA, so that most of the light of the auxiliary light-emitting element 4 enters the display region AA and is mixed with the light-emitting elements 3 at the edge of the display region AA, resulting in high light mixing efficiency and effectively improving the problem of darker edges in the display region AA.

[0049] In some alternative embodiments, with continued reference to Figure 2 and Figure 6 , the array layer 10 is located on the side of the substrate 1 close to the light-emitting layer 2; among them, the functional layer 7 is located on the side of the array layer 10 away from the substrate 1; the functional layer 7 is reused as the planarization layer 12.

[0050] It can be understood that Figure 6The inclination angle of the raised portion 6 on the side of the functional layer 7 away from the substrate 1 is only for illustration and can be set according to actual requirements, and no specific limitation is made in this embodiment. When manufacturing the display panel 100, first, the array layer 10 is manufactured on the substrate 1. Since there are various metal signal traces such as the source and drain electrodes of driving transistors in the array layer 10, the surface of the film layer will be uneven. Therefore, a planarization layer 12 is provided on the array layer 10 to planarize the film layer. Based on the function of the planarized film layer, its thickness is relatively thicker than that of other insulating layers and is more suitable for manufacturing the inclined raised portion; and by multiplexing the functional layer 7 as the planarization layer 12, the manufacturing process can be reduced, and there is no need to separately manufacture a functional layer 7 to form the raised portion 6. The raised portion 6 of the functional layer 7 can raise the auxiliary light-emitting element 4 in the non-display area BB, making the light-emitting surface 5 of the auxiliary light-emitting element 4 inclined. The light emitted from the light-emitting surface 5 of the auxiliary light-emitting element 4 is mixed with the light emitted from the light-emitting element 3 at the edge of the display area AA, improving the problem of low brightness at the edge of the display area AA, and can also reduce the thickness of the display panel 100, realizing the thin and light of the display panel 100.

[0051] In some alternative embodiments, referring to Figure 2 and Figure 7 , Figure 7 is Figure 2 Another cross-sectional view in the M-M' direction in. The display panel 100 provided in this embodiment further includes: an array layer 10 located on the side of the substrate 1 close to the light-emitting layer 2; a functional layer 7 located between the substrate 1 and the array layer 10.

[0052] It can be understood that in Figure 7 only the functional layer 7 is shown to be located between the substrate 1 and the array layer 10. The raised portion 6 of the functional layer 7 raises the auxiliary light-emitting element 4 in the non-display area BB, making the light-emitting surface 5 of the auxiliary light-emitting element 4 inclined towards the display area AA; optionally, a film layer structure can be separately manufactured on the substrate 1 as the functional layer 7; optionally, the functional layer 7 can also be multiplexed as the buffer layer 11 between the substrate 1 and the array layer 10. The buffer layer 11 is a film layer that already exists in the display panel 100. By multiplexing the functional layer 7 as the buffer layer 11, the manufacturing process can be reduced, and there is no need to separately manufacture a functional layer 7 to form the raised portion 6, so that most of the light of the auxiliary light-emitting element 4 enters the display area AA and is mixed with the light-emitting element 3 at the edge of the display area AA, and the light mixing effect is better, effectively improving the problem that the brightness at the edge of the display area AA is lower than the brightness at the middle position of the display area AA. Optionally, the functional layer 7 located between the substrate 1 and the array layer 10 can be multiplexed as the buffer layer 11 between the substrate 1 and the array layer 10, and can also reduce the thickness of the display panel 100, realizing the thin and light of the display panel 100.

[0053] In some alternative embodiments, with continued reference to Figure 2 and Figure 6 , the material of the functional layer 7 is an organic insulating material.

[0054] It can be understood that when the inclination angle of the light-emitting surface 5 of the elevation portion 6 is relatively large, the thickness of the end of the elevation portion 6 away from the display area AA is also relatively high. Since the organic insulating material can be used to fabricate a relatively thick film layer, it can meet the thickness requirements of the functional layer 7 when the inclination angle of the light-emitting surface 5 of the elevation portion 6 is relatively large. Therefore, it is preferred that the material of the functional layer 7 is an organic insulating material, which is conducive to implementation.

[0055] In some alternative embodiments, with reference to Figure 2 and Figure 8 , Figure 8 is Figure 2 Another cross-sectional view in the M-M' direction in

[0056] . The auxiliary light-emitting element 4 includes a first lead 41 and a second lead 42. The second lead 42 is located on the side of the first lead 41 close to the display area AA. In the direction perpendicular to the plane of the substrate 1, the length of the first lead 41 is greater than the length of the second lead 42. Figure 8 It should be noted that in

[0057] , only the inequality of the first lead 41 and the second lead 42 of the auxiliary light-emitting element 4 is shown. The second lead 42 is located on the side of the first lead 41 close to the display area AA, the length of the first lead 41 is greater than the length of the second lead 42, the light-emitting surface 5 of the auxiliary light-emitting element 4 is inclined towards the display area AA, and most of the light emitted by the auxiliary light-emitting element 4 enters the display area AA and is mixed with the light of the light-emitting element 3 at the edge of the display area AA; if the length of the first lead 41 is less than the length of the second lead 42, the light-emitting surface 5 of the auxiliary light-emitting element 4 is inclined towards the side away from the display area AA, and the light emitted from the light-emitting surface 5 of the auxiliary light-emitting element 4 cannot enter the display area AA.

[0058] In some alternative embodiments, with continued reference to Figure 2 and Figure 8 , the included angle θ between the light-emitting surface 5 of the auxiliary light-emitting element 4 and the plane of the substrate 1 ranges from 5° to 60°.

[0059] It can be understood that in Figure 8The dashed line 13 is parallel to the plane where the substrate 1 is located. The included angle between the dashed line 13 and the light-emitting surface 5 of the auxiliary light-emitting element 4 ranges from 5° to 60°. Optionally, the included angle between the dashed line 13 and the light-emitting surface 5 of the auxiliary light-emitting element 4 can be 5° or 60°. If the included angle between the light-emitting surface 5 of the auxiliary light-emitting element 4 and the dashed line 13 is less than 5°, the included angle between the light-emitting surface 5 of the auxiliary light-emitting element 4 and the dashed line 13 is too small, and the light-emitting surface 5 of the auxiliary light-emitting element 4 is approximately parallel to the plane where the substrate 1 is located, and most of the light rays emitted from the light-emitting surface 5 of the auxiliary light-emitting element 4 cannot enter the display area AA to mix light with the light-emitting elements 3 at the edge of the display area AA, and the light mixing effect is weak. If the included angle between the light-emitting surface 5 of the auxiliary light-emitting element 4 and the plane where the substrate 1 is located is greater than 60°, the inclination angle of the light-emitting surface 5 of the auxiliary light-emitting element 4 is too large, resulting in too large a height difference between the end of the light-emitting surface 5 of the auxiliary light-emitting element 4 far from the display area AA and the end of the light-emitting surface 5 of the auxiliary light-emitting element 4 close to the display area AA, causing an increase in the thickness of the display panel 100. Moreover, too large an inclination angle will also affect the stability of the auxiliary light-emitting element 4. Therefore, the range of the included angle between the light-emitting surface 5 of the auxiliary light-emitting element 4 and the plane where the substrate 1 is located from 5° to 60° is the preferred range, but it is not limited thereto.

[0060] In some alternative embodiments, continue to refer to Figure 2 、and refer to Figure 9 and Figure 10 , Figure 9 is a schematic plan view of another display panel 100 provided by the present invention, Figure 10 is a schematic plan view of yet another display panel 100 provided by the present invention. The light-emitting element 3 includes a first light-emitting element 31. Along the direction from the non-display area BB to the display area AA, the first light-emitting element 31 is adjacent to the auxiliary light-emitting element 4, and the light-emitting color of at least one auxiliary light-emitting element 4 is different from that of the first light-emitting element 31 closest to it.

[0061] It should be noted that Figure 9 only shows the array arrangement of the light-emitting elements 3 in the display area AA. The light-emitting elements 3 are arranged in sequence along the column direction Y to form a light-emitting element column. The first light-emitting element 31 is located in the first light-emitting element column. The auxiliary light-emitting elements 4 are arranged in sequence along the column direction Y to form an auxiliary light-emitting element column. Along the row direction X, the first column of the light-emitting element column is flush with the auxiliary light-emitting element column. The light-emitting color of the light-emitting element 3 in the first light-emitting element column is different from that of the adjacent auxiliary light-emitting element 4. The colors of multiple auxiliary light-emitting elements 4 can be the same. Optionally, the light-emitting colors of any two adjacent auxiliary light-emitting elements 4 along the column direction Y in the auxiliary light-emitting element column are different, or the light-emitting colors of at least two auxiliary light-emitting elements 4 are different.

[0062] Figure 10Only the light-emitting elements 3 are schematically shown to be arranged in sequence in the column direction Y to form a column of light-emitting elements. Different light-emitting elements 3 can emit lights of different colors. The first light-emitting element 31 is located in the first column of light-emitting elements. The auxiliary light-emitting elements 4 are arranged in sequence in the column direction Y to form a column of auxiliary light-emitting elements. The first column of light-emitting elements intersects with the column of auxiliary light-emitting elements. The light-emitting color of the light-emitting element 3 in the first column of light-emitting elements is different from that of the adjacent auxiliary light-emitting element 4. The light-emitting colors of any two adjacent auxiliary light-emitting elements 4 in the column direction Y in the column of auxiliary light-emitting elements are different. Optionally, it can also be set that the light-emitting colors of multiple auxiliary light-emitting elements 4 are the same, or the light-emitting colors of at least two auxiliary light-emitting elements 4 are different.

[0063] It can be understood that in the row direction X, whether the auxiliary light-emitting element 4 is flush with the light-emitting element 3 at the edge of the display area AA can provide brightness for mixing light with the light-emitting element 3 at the edge of the display area AA, so as to improve the problem that the brightness at the edge of the display area AA is lower than that at the middle position of the display area AA. When the light-emitting color of the auxiliary light-emitting element 4 is the same as that of the nearest first light-emitting element 31, the auxiliary light-emitting element 4 and the first light-emitting element 31 are mixed to improve the brightness; when the light-emitting color of the auxiliary light-emitting element 4 is different from that of the nearest first light-emitting element 31, color deviation can be avoided while increasing the brightness.

[0064] In some optional embodiments, at least one auxiliary light-emitting element 4 is a white light-emitting element.

[0065] It can be understood that setting at least one auxiliary light-emitting element 4 as a white light-emitting element, because under the same conditions, the brightness of the white light-emitting element is higher than that of the red, green or blue light-emitting element, which is more conducive to improving the brightness at the edge of the display area AA and further improving the phenomenon that the brightness at the edge of the display area AA is darker.

[0066] In some optional embodiments, continue to refer to Figure 2 , the light-emitting element 3 further includes a second light-emitting element 32 adjacent to the first light-emitting element 31. The second light-emitting element 32 is located on the side of the first light-emitting element 31 away from the auxiliary light-emitting element 4. The light-emitting color of the second light-emitting element 32 is different from that of the first light-emitting element 31 and the auxiliary light-emitting element 4.

[0067] It should be noted that Figure 2It is shown in the figure that the light-emitting elements 3 are arranged in an array, and the light-emitting elements 3 are arranged in the column direction Y to form columns of light-emitting elements 3. The first light-emitting element 31 is located in the first column of light-emitting elements, and the second light-emitting element 32 is located in the second column of light-emitting elements. The auxiliary light-emitting elements 4 are arranged in the column direction Y to form columns of auxiliary light-emitting elements. The first column of light-emitting elements is located at the edge position of the display area AA. In the row direction X, the columns of auxiliary light-emitting elements, the first column of light-emitting elements, and the second column of light-emitting elements are arranged in sequence. Optionally, taking the auxiliary light-emitting element 4 as a red light-emitting element 3, the first light-emitting element 31 as a green light-emitting element 3, and the second light-emitting element 32 as a blue light-emitting element 3 as an example, when the red light-emitting element 3, the green light-emitting element 3, and the blue light-emitting element 3 are mixed, white light is mixed. The auxiliary light-emitting element 4 not only provides brightness to improve the brightness at the edge of the display area AA, but also can avoid color deviation because the auxiliary light-emitting element 4, the first light-emitting element 31, and the second light-emitting element 32 are mixed into white light.

[0068] It can be understood that the emission color of the second light-emitting element 32 is different from the emission colors of the first light-emitting element 31 and the auxiliary light-emitting element 4, and can make the auxiliary light-emitting element 4, the first light-emitting element 31, and the second light-emitting element 32 be mixed into white light. When the auxiliary light-emitting element 4 is in the bright state, it is mixed with the first light-emitting element 31 to improve the problem of darker brightness at the edge position of the display area AA, and can also avoid color deviation, further improving the overall display effect.

[0069] In some alternative embodiments, referring to Figure 10 and Figure 11 , Figure 11 is Figure 10 a sectional view in the N-N' direction in. The display panel 100 provided in this embodiment further includes: a quantum dot layer 14, located on the side of the light-emitting layer 2 away from the substrate 1. The quantum dot layer 14 includes a plurality of light conversion units 15. In the direction perpendicular to the plane where the substrate 1 is located, the light conversion units 15 at least partially overlap with the light-emitting elements 3.

[0070] It should be noted that the light-emitting element 3 can be a light-emitting element 3 of any color, and the light conversion unit 15 can convert the light emitted by the light-emitting element 3 into any required color of light. For example, when the light-emitting element 3 emits blue light and the light conversion unit 15 includes red quantum dot materials, the blue light emitted by the light-emitting element 3 is converted into red light by the light conversion unit 15; in addition, the light conversion unit 15 also includes green quantum dot materials, and the blue light emitted by the light-emitting element 3 is converted into green light by the light conversion unit 15, and it is not limited to this. The quantum dot materials are ZnCdSe 2 、CdSe、CdTe、CuInS 2 、ZnCuInS 3 or one or more of them.

[0071] It can be understood that in Figure 11 only the light-shielding portion 16 between two adjacent light conversion units 15 is schematically shown, which prevents color crosstalk between light conversion units 15 of different colors. Optionally, there is no gap between two adjacent light conversion units 15, and a light-shielding layer is provided on one side of the quantum dot layer 14 to prevent color crosstalk between light conversion units 15 of different colors. The light conversion unit 15 in the quantum dot layer 14 can convert the light emitted by the blue light-emitting element 3 into light of other colors, which helps the color display of the display panel 100. Figure 11 It is schematically shown in

[0072] that in a direction perpendicular to the plane of the substrate 1, the quantum dot layer 14 at least partially overlaps with the display area AA, but the quantum dot layer 14 does not overlap with the non-display area BB. Due to process errors, there will be defects at the edge of the quantum dot layer 14, resulting in a decrease in the conversion rate of the edge quantum dot layer 14, making the brightness at the edge position of the display area AA darker. By providing the auxiliary light-emitting element 4 in the non-display area BB to provide brightness, when the auxiliary light-emitting element 4 is in the bright state, it mixes light with the light-emitting element 3 at the edge of the display area AA, improving the problem that the brightness at the edge position of the display area AA is lower than the brightness at the middle position of the display area AA.

[0072] In some alternative embodiments, referring to Figure 10 and Figure 12 Figure 12 is another sectional view in the N-N' direction in Figure 10 . The display panel 100 provided in this embodiment further includes: a color filter layer 17, located on the side of the quantum dot layer 14 away from the light-emitting layer 2, and in a direction perpendicular to the plane of the substrate 1, the color filter layer 17 covers the quantum dot layer 14.

[0073] It should be noted that in the color filter layer 17, a light-shielding portion 16 is provided between color resistors of two adjacent colors to prevent color crosstalk. Therefore, in this case, the quantum dot layer 14 may not be provided with a light-shielding layer or a barrier wall, etc.

[0074] It can be understood that due to the presence of the quantum dot layer 14, the color display of the display panel 100 can already be achieved. The color filter layer 17 is provided to improve the color gamut and the display effect is better.

[0075] In some alternative embodiments, referring to Figure 13 Figure 13 is a schematic plan view of a display device 200 provided by the present invention. The display device 200 provided in this embodiment includes the display panel 100 provided in the above embodiment of the present invention. Figure 13Taking only a mobile phone as an example, the display device 200 will be described. It can be understood that the display device 200 provided by the embodiments of the present invention can be other display devices 200 with a display function, such as a computer, a television, a vehicle-mounted display device 200, etc. The present invention does not make specific limitations thereto. The display device 200 provided by the embodiments of the present invention has the beneficial effects of the display panel 100 provided by the embodiments of the present invention. For specific descriptions of the display panel 100, reference can be made to the above embodiments, and details will not be repeated herein.

[0076] As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

[0077] In the display panel and the display device provided by the present invention, the light-emitting layer includes a plurality of light-emitting elements located in the display area and a plurality of auxiliary light-emitting elements located in the non-display area. The auxiliary light-emitting elements are mixed with the adjacent light-emitting elements; some of the light-emitting elements are located at the edge of the display area. The light-emitting elements located at the edge of the display area are closest to the non-display area, that is, the light-emitting elements located at the edge of the display area are adjacent to the auxiliary light-emitting elements. When the auxiliary light-emitting elements are in the bright state, they are mixed with the light-emitting elements located at the edge of the display area, improving the brightness at the edge of the display area and optimizing the brightness uniformity between the center and the edge of the display area.

[0078] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that, the display panel includes a display area and at least a part of a non-display area surrounding the display area, and the display panel further includes: a substrate; a light-emitting layer located on one side of the substrate, including a plurality of light-emitting elements located in the display area and a plurality of auxiliary light-emitting elements located in the non-display area, and the auxiliary light-emitting elements mix light with the adjacent light-emitting elements; in a direction perpendicular to the plane of the substrate, the distance between the light-emitting surface of the auxiliary light-emitting element away from the display area end and the substrate is A, and the distance between the light-emitting surface of the auxiliary light-emitting element close to the display area end and the substrate is B, and A > B.

2. The display panel according to claim 1, characterized in that, it further includes a heightening portion; in a direction perpendicular to the plane of the substrate, the heightening portion at least partially overlaps with the auxiliary light-emitting element; in a direction perpendicular to the plane of the substrate, the thickness of the heightening portion at the end close to the display area is less than the thickness of the heightening portion at the end away from the display area.

3. The display panel according to claim 2, characterized in that, it further includes a functional layer; the functional layer includes a first area and at least a part of a second area surrounding the first area, and in a direction perpendicular to the plane of the substrate, the first area at least partially overlaps with the display area, and the heightening portion is provided in the second area.

4. The display panel according to claim 3, characterized in that, it further includes: an array layer located on the side of the substrate close to the light-emitting layer; wherein, the functional layer is located on the side of the array layer away from the substrate; the functional layer is multiplexed as a planarization layer.

5. The display panel according to claim 3, characterized in that, it further includes: an array layer located on the side of the substrate close to the light-emitting layer; the functional layer is located between the substrate and the array layer.

6. The display panel according to claim 5, characterized in that, the material of the functional layer is an organic insulating material.

7. The display panel according to claim 1, characterized in that, the auxiliary light-emitting element includes a first pin and a second pin, the second pin is located on the side of the first pin close to the display area, and in a direction perpendicular to the plane of the substrate, the length of the first pin is greater than the length of the second pin.

8. The display panel according to claim 1, characterized in that, the included angle range between the light-emitting surface of the auxiliary light-emitting element and the plane of the substrate is 5° to 60°.

9. The display panel according to claim 1, characterized in that, the light-emitting element includes a first light-emitting element, in the direction from the non-display area to the display area, the first light-emitting element is adjacent to the auxiliary light-emitting element, and the light-emitting color of at least one of the auxiliary light-emitting elements is different from the light-emitting color of the first light-emitting element closest to it.

10. The display panel according to claim 1, characterized in that, at least one of the auxiliary light-emitting elements is a white light-emitting element.

11. The display panel according to claim 9, wherein, the light-emitting element further includes a second light-emitting element adjacent to the first light-emitting element, the second light-emitting element is located on a side of the first light-emitting element away from the auxiliary light-emitting element, and a light-emitting color of the second light-emitting element is different from both a light-emitting color of the first light-emitting element and a light-emitting color of the auxiliary light-emitting element.

12. The display panel according to claim 1, wherein, it further includes: a quantum dot layer located on a side of the light-emitting layer away from the substrate, the quantum dot layer includes a plurality of light conversion units, and in a direction perpendicular to a plane where the substrate is located, the light conversion units at least partially overlap with the light-emitting elements.

13. The display panel according to claim 12, wherein, it further includes: a color filter layer located on a side of the quantum dot layer away from the light-emitting layer, and in a direction perpendicular to a plane where the substrate is located, the color filter layer covers the quantum dot layer.

14. A display device, wherein, it includes the display panel according to any one of claims 1-13 above.

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