CN115000141A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN115000141A
CN115000141A CN202210615767.XA CN202210615767A CN115000141A CN 115000141 A CN115000141 A CN 115000141A CN 202210615767 A CN202210615767 A CN 202210615767A CN 115000141 A CN115000141 A CN 115000141A
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China
Prior art keywords
light
display panel
substrate
light emitting
emitting
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CN202210615767.XA
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Chinese (zh)
Inventor
蔡雨
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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Priority to CN202210615767.XA priority Critical patent/CN115000141A/en
Publication of CN115000141A publication Critical patent/CN115000141A/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes

Abstract

The embodiment of the invention discloses a display panel and a display device, which comprise a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area; the first light emitting element of the first display region includes a first light emitting body, and the second light emitting element of the second display region includes a second light emitting body; the first side light-emitting surface of the first light-emitting body comprises a first side light-emitting point, and the second side light-emitting surface of the second light-emitting body comprises a second side light-emitting point; along the thickness direction of the display panel, the relative position relationship between the first side light-emitting point and the first side light-emitting surface is the same as the relative position relationship between the second side light-emitting point and the second side light-emitting surface; an included angle between a tangent plane at the first side light-emitting point and the substrate is smaller than an included angle between a tangent plane at the second side light-emitting point and the substrate. The technical scheme provided by the embodiment of the invention solves the problem of uneven visual angle brightness of the display panel and improves the display effect of the display panel.

Description

Display panel and display device
Technical Field
The embodiment of the invention relates to the technical field of display panels, in particular to a display panel and a display device.
Background
With the rapid development of display technology, people have higher and higher requirements for the quality of display panels. Many current display devices all adopt a Camera (CUP) Under the screen, and accordingly, this region is a transparent display area, and it can be understood that the Camera is embedded in the display panel, so that the screen occupation ratio can be improved.
However, the CUP region has a viewing angle brightness difference from other display regions, which affects the display effect of the display device.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for solving the problem of uneven visual angle brightness of the display panel and improving the display effect of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including a first display area and a second display area, where light transmittance of the first display area is greater than that of the second display area, and the second display area surrounds at least a portion of the first display area;
the first display region includes a first light emitting element including a first light emitting body, the second display region includes a second light emitting element including a second light emitting body;
the first light-emitting body comprises a first side light-emitting surface, the first side light-emitting surface comprises a first side light-emitting point, the second light-emitting body comprises a second side light-emitting surface, and the second side light-emitting surface comprises a second side light-emitting point; along the thickness direction of the display panel, the relative position relationship between the first side light-emitting point and the first side light-emitting surface is the same as the relative position relationship between the second side light-emitting point and the second side light-emitting surface;
and an included angle between a tangent plane at the first side light-emitting point and the substrate is smaller than an included angle between a tangent plane at the second side light-emitting point and the substrate.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect.
In the technical scheme of the embodiment of the invention, under the condition that the light transmittance of the first display area is greater than that of the second display area, the first light-emitting body in the first display region comprises a first side light-emitting surface, the second light-emitting body in the second display region comprises a second side light-emitting surface, the relative position relationship between the first side light-emitting surface and the first side light-emitting surface on the first side light-emitting surface, and the relative position relation between the second side light-emitting point and the second side light-emitting surface on the second side light-emitting surface is the same, and the included angle between the tangent plane at the first side light-emitting point and the substrate is smaller than the included angle between the tangent plane at the second side light-emitting point and the substrate, the large viewing angle luminance of the first display region can be made lower than that of the second display region, and thus, the brightness difference between the first display area and the second display area can be reduced, and the uniformity of the brightness of the display panel is ensured.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic partial cross-sectional view of the first and second light emitters of FIG. 2;
fig. 4 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 6 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
FIG. 7 is a partial cross-sectional structural view of the first light emitter of FIG. 6;
fig. 8 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the disclosure;
fig. 10 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view taken along line B-B' of FIG. 11;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a cross-section of fig. 1 along a direction a-a', as shown in fig. 1 and fig. 2, the display panel includes a first display area 100 and a second display area 200, a light transmittance of the first display area 100 is greater than a light transmittance of the second display area 200, and the second display area 200 surrounds at least a portion of the first display area 100; the first display area 100 includes a first light emitting element 10, the first light emitting element 10 includes a first light emitting body 11, the second display area 200 includes a second light emitting element 20, the second light emitting element 20 includes a second light emitting body 21; the first light-emitting body 11 includes a first side light-emitting surface 111, the first side light-emitting surface 111 includes a first side light-emitting point C, the second light-emitting body 21 includes a second side light-emitting surface 211, and the second side light-emitting surface 211 includes a second side light-emitting point D; along the thickness direction Z of the display panel, the relative position relationship between the first side light-emitting point C and the first side light-emitting surface 111 is the same as the relative position relationship between the second side light-emitting point D and the second side light-emitting surface 211; an included angle theta 1 between the tangent plane at the first side light-emitting point C and the substrate 140 is smaller than an included angle theta 2 between the tangent plane at the second side light-emitting point D and the substrate 140.
As shown in fig. 1, a specific positional relationship between the first display area 100 and the second display area 200 is not particularly limited in the embodiments of the present invention, and fig. 1 only exemplarily shows that the second display area 200 surrounds the first display area 100, the first display area 100 includes, but is not limited to, an area of an off-screen camera or a fingerprint identification area, and the second display area 200 includes, but is not limited to, an effective display area of a display panel. Since the light transmittance of the first display area 100 is greater than that of the second display area 200, some photosensitive elements in the first display area 100, such as a camera or a fingerprint sensor, have better photosensitive sensitivity. However, the first display area 100 and the second display area 200 may have a brightness difference at a large viewing angle, which affects the display effect of the display device.
As shown in fig. 2, the first light emitting device 10 and the second light emitting device 20 can be manufactured in the same process during the manufacturing process of the display panel, so as to simplify the manufacturing process. However, the distances from the substrate 140 to the first light emitting element 10 and the second light emitting element 20 in the thickness direction Z of the display panel may be different or the same, and this is not limited in this embodiment of the present invention and may be set according to actual situations. Fig. 2 is a schematic diagram illustrating a structure of a positional relationship between the first light emitting element 10 and the second light emitting element 20, but is not limited thereto.
The first light emitting element 10 and the second light emitting element 20 include, but are not limited to, one or more of a red light emitting element, a green light emitting element, a blue light emitting element, a white light emitting element, a yellow light emitting element, a cyan light emitting element, and a magenta light emitting element.
With continued reference to fig. 2, the first and second light emitting elements 10 and 20 further include an anode layer 40 and a cathode layer 50 on both sides of the first and second light emitting bodies 11 and 21, respectively, wherein the first and second light emitting bodies 11 and 21 include light emitting layers. It should be noted that the first light emitting body 11 and the second light emitting body 21 include, but are not limited to, being disposed in a pixel defining layer, and may also be other organic film layers, which is not limited in this embodiment of the present invention.
In addition, the first and second light emitting elements 10 and 20 may further include an auxiliary light emitting layer for promoting recombination of carriers in the light emitting layer, in addition to the functional film layer illustrated above, for example, the auxiliary light emitting layer may include one or more of a hole injection layer, a hole transport layer, a resistance blocking layer, a hole transport layer, and a hole injection layer, which is not limited herein.
Further, the first light emitting element 10 is electrically connected to the pixel driving circuit 60, and the second light emitting element 20 is electrically connected to the pixel driving circuit 70, it is understood that the pixel driving circuit 60 and the pixel driving circuit 70 include a thin film transistor T and the like (the pixel circuit including one thin film transistor T is only exemplarily shown in the figure). In addition, other film layers including, but not limited to, a buffer layer, an inorganic insulating layer, an organic insulating layer, and the like may be further included between the first and second light emitting elements 10 and 20 and the substrate 140.
As shown in fig. 2, the first light emitting body 11 includes a first side light emitting surface 111, the second light emitting body 21 includes a second side light emitting surface 211, and the first side light emitting surface 111 and the second side light emitting surface 211 may be a plane, a curved surface, or any other shape. In addition, along the first direction X parallel to the plane of the substrate 140, the two first side light-emitting surfaces 111 of the first light-emitting body 11 include, but are not limited to, a symmetrical structure, and similarly, the two second side light-emitting surfaces 211 of the second light-emitting body 21 also include, but are not limited to, a symmetrical structure.
Further, along the thickness direction Z of the display panel, the relative position relationship between the first side light-emitting point C and the first side light-emitting surface 111 is the same as the relative position relationship between the second side light-emitting point D and the second side light-emitting surface 211, in other words, the specific position of the first side light-emitting point C on the first side light-emitting surface 111 is the same as the position of the second side light-emitting point D on the second side light-emitting surface 211, which may be an end point, a center point, or any point of the light-emitting surface, which is not limited in the embodiment of the present invention.
Illustratively, referring to fig. 2, in the thickness direction Z of the display panel, the first side light exit point C is located at the height of 1/2 of the first side light exit surface 111, and the second side light exit point D is also located at the height of 1/2 of the second side light exit surface 211. It should be noted that, along the thickness direction Z of the display panel, the height of the first side light emitting surface 111 may be the same as or different from the height of the second side light emitting surface 211, which is not limited in this embodiment of the present invention, and fig. 2 is only an exemplary illustration.
At this time, since the included angle θ 1 between the tangent plane where the first side light-emitting point C is located and the substrate 140 is smaller than the included angle θ 2 between the tangent plane where the second side light-emitting point D is located and the substrate 140, when the light in the same direction irradiates the first side light-emitting point C and the second side light-emitting point D, the propagation directions of the light are also different.
For example, fig. 3 is a schematic partial cross-sectional structure diagram of the first light emitter and the second light emitter in fig. 2, as shown in fig. 3, when the light ray G irradiates the first side light exit point C, since an included angle θ 1 between a tangent plane where the first side light exit point C is located and the substrate 140 is small, the light ray G may be directly reflected at the first side light exit point C and emitted from the light exit surface side of the display panel, and the finally emitted light ray is G1. When the light G in the same direction irradiates the second side light-emitting point D, because the included angle θ 2 between the tangent plane at the second side light-emitting point D and the substrate 140 is relatively large, total reflection generally does not occur, and the film layer where the second light-emitting body 20 is usually located is a transparent organic film layer, so that the light G can be directly refracted in the transparent organic film layer, and then is emitted from the surface of the transparent organic film layer away from the substrate 140, and the light finally emitted is G2. As is apparent from fig. 3, the light ray G1 has a smaller viewing angle of light extraction compared to the light ray G2, so that the first display area 100 has a smaller viewing angle brightness. Thus, when the light transmittance of the first display area 100 is greater than that of the second display area 200, the brightness difference between the first display area 100 and the second display area 200 under a large viewing angle can be reduced by reducing the viewing angle brightness of the first display area 100, and the overall brightness uniformity of the display panel can be improved.
In the display panel provided by the embodiment of the invention, under the condition that the light transmittance of the first display area is greater than that of the second display area, the first light-emitting body in the first display region comprises a first side light-emitting surface, the second light-emitting body in the second display region comprises a second side light-emitting surface, and the relative position relationship between the first side light-emitting surface and the first side light-emitting surface on the first side light-emitting surface, and the relative position relation between the second side light-emitting point and the second side light-emitting surface on the second side light-emitting surface is the same, and the included angle between the tangent plane at the first side light-emitting point and the substrate is smaller than the included angle between the tangent plane at the second side light-emitting point and the substrate, the large viewing angle luminance of the first display region can be made lower than the large viewing angle luminance of the second display region, and thus, the brightness difference between the first display area and the second display area can be reduced, and the uniformity of the brightness of the display panel is ensured.
Optionally, fig. 4 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, as shown in fig. 4, the display panel further includes a pixel defining layer 80, the pixel defining layer 80 includes a first pixel defining layer 81 located in the first display area 100 and a second pixel defining layer 82 located in the second display area 200, the first light-emitting body 11 is disposed in the first pixel defining layer 81, and the second light-emitting body 21 is disposed in the second pixel defining layer 82; the thickness of the first pixel defining layer 81 is smaller than the thickness of the second pixel defining layer 82 in the thickness direction Z of the display panel.
The material for preparing the first pixel defining layer 81 and the second pixel defining layer 82 may include an organic material or an inorganic material, and the inorganic material includes, but is not limited to, silicon oxide or silicon nitride, which is not limited in this embodiment of the present invention. In addition, the first pixel defining layer 81 and the second pixel defining layer 82 may be prepared on the same layer, or may be prepared on different layers. Fig. 4 is shown for exemplary purposes only.
With continued reference to fig. 3 and 4, the thickness d1 of the first pixel defining layer 81 is smaller than the thickness d2 of the second pixel defining layer 82 in the thickness direction Z of the display panel, and by disposing the first light emitting body 10 in the first pixel defining layer 81 and the second light emitting body 21 in the second pixel defining layer 82, the thickness of the light emitting body can be adjusted by changing the thickness of the pixel defining layer. It can be understood that the smaller the thickness of the light-emitting body, the smaller the inclination of the side light-emitting surface of the light-emitting body in the first direction X. In other words, when the thickness D1 of the first pixel defining layer 81 is smaller than the thickness D2 of the second pixel defining layer 82, and accordingly, the thickness of the first light emitting body 10 is smaller than the thickness of the second light emitting body 20, the included angle θ 1 between the tangent plane at the first side light-emitting point C and the substrate 140 is smaller than the included angle θ 2 between the tangent plane at the second side light-emitting point D and the substrate 140. Thus, the light emitted through the first display area 100 has smaller viewing angle brightness than the light emitted through the second display area 200, thereby reducing the display brightness of the first display area 100 under a large viewing angle, further reducing the brightness difference between the first display area 100 and the second display area 200, and improving the brightness uniformity of the display panel.
It should be noted that, in the embodiment of the present invention, specific values of the thickness d1 of the first pixel defining layer 81 and the thickness d2 of the second pixel defining layer 82 are not particularly limited, and can be selectively set according to actual requirements.
Optionally, fig. 5 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 5, the first light-emitting body 11 includes a first light-emitting surface 112 close to one side of the substrate 140, and the second light-emitting body 21 includes a second light-emitting surface 212 close to one side of the substrate; the area of the first light emitting face 112 is smaller than the area of the second light emitting face 212.
Specifically, along the thickness direction Z of the display panel, the first light emitting body 11 and the second light emitting body 21 have the same thickness, and the area of the first light emitting surface 112 is reduced, so that the area of the first light emitting surface 112 is smaller than the area of the second light emitting surface 212, and the slope of the first side light emitting surface 111 is smaller than the slope of the second side light emitting surface 211, that is, the included angle θ 1 between the tangent plane at the first side light emitting point C and the substrate 140 is smaller than the included angle θ 2 between the tangent plane at the second side light emitting point D and the substrate 140, so that the display brightness of the first display area 100 at a large viewing angle can be reduced, the brightness difference between the first display area 100 and the second display area 200 can be reduced, and the brightness uniformity of the display panel can be improved.
It should be noted that in this embodiment, the area of the light emitting surface of the first light emitting body 11 on the side away from the substrate 140 (i.e., the third light emitting surface 113) may be the same as the area of the light emitting surface of the second light emitting body 20 on the side away from the substrate 140 (i.e., the fourth light emitting surface 213), or the area of the light emitting surface of the first light emitting body 11 on the side away from the substrate 140 is larger than the area of the light emitting surface of the second light emitting body 20 on the side away from the substrate 140, which is not limited in this disclosure in real time.
Optionally, with continued reference to fig. 5, the first light emitting body 11 includes a third light emitting face 113 on a side away from the substrate 140, and the second light emitting body 21 includes a fourth light emitting face 213 on a side away from the substrate; the area of the third light emitting face 113 is larger than that of the fourth light emitting face 213.
It can be understood that, along the thickness direction Z of the display panel, the first light emitting body 11 and the second light emitting body 21 have the same thickness, and the area of the third light emitting surface 113 is increased to make the area of the third light emitting surface 113 larger than the area of the fourth light emitting surface 213, so that the slope of the first side light emitting surface 111 is smaller than the slope of the second side light emitting surface 211, that is, the included angle θ 1 between the tangent plane at the first side light emitting point C and the substrate 140 is smaller than the included angle θ 2 between the tangent plane at the second side light emitting point D and the substrate 140, so as to reduce the display brightness of the first display area 100 at a large viewing angle, reduce the brightness difference between the first display area 100 and the second display area 200, and improve the brightness uniformity of the display panel.
It should be noted that in this embodiment, the area of the light emitting surface of the first light emitting body 11 close to the substrate 140 (i.e., the first light emitting surface 112) may be the same as the area of the light emitting surface of the second light emitting body 20 close to the substrate 140 (i.e., the second light emitting surface 212), or the area of the light emitting surface of the first light emitting body 11 close to the substrate 140 is smaller than the area of the light emitting surface of the second light emitting body 20 close to the substrate 140, which is not limited in this embodiment.
Optionally, fig. 6 is a schematic cross-sectional structure view of another display panel according to an embodiment of the disclosure, fig. 7 is a schematic partial cross-sectional structure view of the first light emitter in fig. 6, and with reference to fig. 6 and fig. 7, the first side light emitting surface 111 includes a plurality of first side light emitting points C; in any two first side light-emitting points C, an included angle θ 3 between a tangent plane at the first side light-emitting point C1 close to one side of the substrate 140 and the substrate 140 is greater than an included angle θ 4 between a tangent plane at the first side light-emitting point C2 far from one side of the substrate 140 and the substrate 140.
Specifically, because an included angle θ 3 between the tangent plane at the first side light-emitting point C1 near the substrate 140 and the substrate 140 is greater than an included angle θ 4 between the tangent plane at the first side light-emitting point C2 far from the substrate 140 and the substrate 140, the first side light-emitting surface 111 has a curved surface structure with a certain radian, and the closer to the substrate 140, the larger the included angle between the first side light-emitting surface 111 and the first direction X is. Referring to fig. 6, the first side light emitting surface 111 on both sides of the first light emitting body 11 forms a cross-sectional view in the shape of an inverted eight.
As shown in fig. 7, by making the included angle between the tangent plane at the first side light-emitting point C2 on the first side light-emitting surface 111 away from the substrate 140 and the substrate 140 smaller, the light ray G2 irradiated to the first side light-emitting point C2 on the side away from the substrate 140 is directly reflected to become the light ray G3, and then emitted from the light-emitting surface of the display panel. It can be understood that if the included angle between the tangent plane at the first side light exit point C2 far from the substrate 140 and the substrate 140 is relatively large, the light ray G2 cannot be totally reflected and directly enters the organic insulating film layer (e.g., the pixel defining layer) and exits from the light transmission paths G2-G2' -G2 ″, and the light ray G2 ″ is deviated from the center of the first light emitter compared with the light ray G3. Therefore, the included angle between the tangent plane at the first side light exit point C2 on the first side light exit surface 111 away from the substrate 140 and the substrate 140 is reduced, which is beneficial to reducing the brightness of the viewing angle of the first display area 100.
Meanwhile, by making the included angle between the tangent plane at the first side light-emitting point C1 on the first side light-emitting surface 111 close to the substrate 140 and the substrate 140 larger, the light ray G1 irradiated to the first side light-emitting point C1 on the side close to the substrate 140 is directly refracted in the organic insulating film layer (e.g., the pixel defining layer), and then the light ray transmission path G1-G4-G5 is emitted, so as to avoid the light ray G1 from being totally reflected and emitted from the light ray G1' to the light source far away from the center of the first light emitter. In this way, the angle between the substrate 140 and the tangent plane of the first side light exit point C1 on the first side light exit surface 111 close to the substrate 140 is increased, which is also beneficial to reducing the brightness of the viewing angle of the first display area 100.
Therefore, by setting the included angle between the tangent plane at the plurality of first side light-emitting points on the first side light-emitting surface 111 and the substrate 140 to gradually decrease along the thickness direction Z of the display panel, the light can be refracted or reflected on the first side light-emitting surface 111 and then can be converged toward the center of the first light-emitting main body 11, so as to reduce the brightness of the first display area 100 at the large viewing angle, thereby reducing the brightness difference between the first display area 100 and the second display area 200, and improving the display effect of the display panel.
Optionally, fig. 8 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, and as shown in fig. 8, the display panel further includes a first color filter unit 91 and a second color filter unit 92; in the thickness direction Z of the display panel, the first color filter unit 91 at least partially overlaps the first light emitting element 10, and the second color filter unit 92 at least partially overlaps the second light emitting element 20; a distance between the first color filter unit 91 and the first light emitting element 10 is greater than a distance between the second color filter unit 92 and the second light emitting element 20 in the thickness direction Z of the display panel.
The first color filter unit 91 and the second color filter unit 92 include, but are not limited to, one or more of a red color filter unit, a green color filter unit, or a blue color filter unit. It is understood that light having the same color as the color filter units may be transmitted according to the color of the first and second color filter units 91 and 92.
It can be understood that, referring to fig. 8, in the case that the first color filter unit 91 and the second color filter unit 92 have the same area, the distance between the first color filter unit 91 and the first light emitting device 10 is greater than the distance between the second color filter unit 92 and the second light emitting device 20, so that the light rays emitted from the center of the light emitting surface of the light emitting device near the substrate 140 to the end point of the color filter unit are the light ray G6 and the light ray G7, respectively, it is obvious that the included angle between the light ray G6 and the plane in the Z direction is smaller than the included angle between the light ray G7 and the plane in the Z direction, and thus the brightness of the viewing angle of the first light emitting device 10 is smaller than the brightness of the viewing angle of the second light emitting device 20. Therefore, by setting the distance between the first color filter unit 91 and the first light emitting element 10 to be greater than the distance between the second color filter unit 92 and the second light emitting element 20, the brightness of the viewing angle of the first display region 100 can be made to be smaller than the brightness of the viewing angle of the second display region 200, so that the brightness difference between the first display region 100 and the second display region 200 is reduced, and the display effect of the display panel is improved.
It should be noted that, the embodiment of the invention does not limit how to realize that the distance between the first color filter unit 91 and the first light emitting element 10 is larger than the distance between the second color filter unit 92 and the second light emitting element 20, for example, by adjusting the thickness of the film layer between the color filter unit and the light emitting element.
Optionally, with continued reference to fig. 8, the display panel further includes a first encapsulating structure 93 and a second encapsulating structure 94, and along the thickness direction Z of the display panel, the first encapsulating structure 93 is located between the first light emitting element 10 and the first color filter unit 91, and the second encapsulating structure 94 is located between the second light emitting element 20 and the second color filter unit 92; the first encapsulation structure 93 includes at least one first encapsulation layer 931, and the second encapsulation structure 94 includes at least one second encapsulation layer 941; in the thickness direction Z of the display panel, the first encapsulation structure 93 at least partially overlaps the first light emitting element 10, and the second encapsulation structure 94 at least partially overlaps the second light emitting element 20; in the thickness direction Z of the display panel, the thickness d3 of the first package structure 93 is greater than the thickness d4 of the second package structure.
It is understood that the first and second encapsulation structures 93 and 94 may be provided by a multi-layer film structure stack, typically including at least one inorganic layer and at least one organic layer. The inorganic layer may be used as a blocking layer to block water and oxygen, and the organic layer may be used as a buffer layer to improve flexibility of the package structure, which may be selectively disposed by a person skilled in the art according to actual conditions, so that the first package layer 931 and the second package layer 941 may be inorganic package layers or organic package layers, which is not limited in the embodiment of the present invention.
Specifically, by adjusting the thickness d3 of the first encapsulation structure 93 and the thickness d4 of the second encapsulation structure, and making d3 greater than d4, the distance between the first color filter unit 91 and the first light emitting element 10 is greater than the distance between the second color filter unit 92 and the second light emitting element 20, so that the viewing angle brightness of the first display area 100 can be reduced, the brightness difference between the first display area 100 and the second display area 200 can be reduced, the brightness uniformity of the display panel can be improved, and the display panel has a better display effect.
Optionally, with continued reference to fig. 8, the first encapsulation layer 931 includes at least a first organic encapsulation layer, and the second encapsulation layer 941 includes at least a second organic encapsulation layer; the thickness of the first organic encapsulation layer is greater than the thickness of the second organic encapsulation layer along the thickness direction Z of the display panel.
The first encapsulation layer 931 may be a first organic encapsulation layer, and the second encapsulation layer 941 may be a second organic encapsulation layer, where the materials of the first organic encapsulation layer and the second organic encapsulation layer include, but are not limited to, organic transparent resins.
Specifically, by adjusting the thickness of the organic encapsulation layer in the first encapsulation layer 931 and the second encapsulation layer 941, the thickness of the first organic encapsulation layer is greater than the thickness of the second organic encapsulation layer, and further the thickness d3 of the first encapsulation structure 93 is greater than the thickness d4 of the second encapsulation structure, so that the distance between the first color filter unit 91 and the first light emitting element 10 is greater than the distance between the second color filter unit 92 and the second light emitting element 20, the viewing angle brightness of the first display region 100 is reduced, the brightness difference between the first display region 100 and the second display region 200 is reduced, and the display effect of the display panel is improved. Further, compare in inorganic material, organic material can realize bigger thickness, sets up first encapsulation layer 931 promptly and be first organic encapsulation layer, and second encapsulation layer 941 is the organic encapsulation layer of second, and the scheme through organic material adjustment rete thickness realizes more easily, guarantees that display panel preparation simple process.
Optionally, in another embodiment, fig. 9 is a schematic cross-sectional structure diagram of another display panel provided by the embodiment of the present invention, as shown in fig. 9, the first light emitting body 10 includes a first light emitting surface 112 close to a side of the substrate 140 and a third light emitting surface 113 away from the side of the substrate 140, and the second light emitting body 20 includes a second light emitting surface 212 close to the side of the substrate 140 and a fourth light emitting surface 213 away from the side of the substrate 140; in the thickness direction Z of the display panel, the distance between the first light emitting surface 112 and the substrate 140 is smaller than the distance between the second light emitting surface 212 and the substrate 140, and the distance between the third light emitting surface 113 and the substrate 140 is smaller than the distance between the fourth light emitting surface 213 and the substrate 140.
Specifically, the distance between the first light emitting surface 112 and the substrate 140 is smaller than the distance between the second light emitting surface 212 and the substrate 140, and the distance between the third light emitting surface 113 and the substrate 140 is smaller than the distance between the fourth light emitting surface 213 and the substrate 140, which can be understood that the first light emitting body 10 is closer to the substrate 140 than the second light emitting body 20, and at this time, when the first color filter unit 91 and the second color filter unit 92 are located at the same horizontal plane, the distance between the first color filter unit 91 and the first light emitting element 10 is greater than the distance between the second color filter unit 92 and the second light emitting element 20, so that the viewing angle brightness of the first display region 100 is reduced, the brightness difference between the first display region 100 and the second display region 200 is reduced, and the display effect of the display panel is improved.
In addition, the sides of the first light emitting element 10 and the second light emitting element 20 away from the substrate 140 are usually further provided with other organic film layers, such as the planarization layer 120, and the like, and fig. 9 is given only for illustrative purposes.
Optionally, with continued reference to fig. 9, the display panel further includes a pixel defining layer 80 and at least one organic insulating layer 110 on a side of the pixel defining layer 80 close to the substrate 140; at least a portion of the first light emitting body 10 is disposed in the organic insulating layer 110, and at least a portion of the second light emitting body 20 is disposed in the pixel defining layer 80.
The material of the organic insulating layer 110 includes, but is not limited to, organic transparent resin.
It is understood that fig. 9 is only an exemplary illustration showing that the first light emitting body 10 is simultaneously disposed in the pixel defining layer 80 and the organic insulating layer 110, and the second light emitting body 20 is entirely disposed in the pixel defining layer 80, in which case, the anode layer in the second light emitting body 20 needs to be electrically connected to the metal layer where the anode layer 40 of the first light emitting body 10 is disposed through the via hole. As is apparent from fig. 9, a distance between the first light emitting surface 112 and the substrate 140 is smaller than a distance between the second light emitting surface 212 and the substrate 140, and a distance between the third light emitting surface 113 and the substrate 140 is smaller than a distance between the fourth light emitting surface 213 and the substrate 140, so that a distance between the first color filter unit 91 and the first light emitting element 10 is greater than a distance between the second color filter unit 92 and the second light emitting element 20, thereby reducing the luminance at the viewing angle of the first display area 100, reducing the luminance difference between the first display area 100 and the second display area 200, and improving the display effect of the display panel.
It should be noted that, in another embodiment, the second light emitting body 20 may also be disposed in the pixel defining layer 80 and the organic insulating layer 110 at the same time, and the distance between the first light emitting surface 112 and the substrate 140 may also be smaller than the distance between the second light emitting surface 212 and the substrate 140, and the distance between the third light emitting surface 113 and the substrate 140 may also be smaller than the distance between the fourth light emitting surface 213 and the substrate 140 by adjusting the thickness of the first light emitting body 10 in the organic insulating layer 110 to be greater than the thickness of the second light emitting body 20 in the organic insulating layer 110. Further, in still another embodiment, the first light emitting body 10 may be disposed only in the organic insulating layer 110, and the second light emitting body 20 is disposed in both the pixel defining layer 80 and the organic insulating layer 110, and it is also possible to realize that the distance between the first light emitting surface 112 and the substrate 140 is smaller than the distance between the second light emitting surface 212 and the substrate 140, and the distance between the third light emitting surface 113 and the substrate 140 is smaller than the distance between the fourth light emitting surface 213 and the substrate 140. Here, details are not repeated, and the effects of reducing the brightness of the viewing angle of the first display area 100, reducing the brightness difference between the first display area 100 and the second display area 200, and improving the brightness uniformity of the display panel can be achieved.
Optionally, fig. 10 is a schematic cross-sectional structural view of another display panel provided in an embodiment of the present invention, as shown in fig. 10, the display panel further includes a light shielding unit 130, and the light shielding unit 130 includes a first light shielding subunit 131 located in the first display area 100 and a second light shielding subunit 132 located in the second display area 200; the light-shielding area of the first light-shielding subunit 131 is smaller than that of the second light-shielding subunit 132 per unit area.
It is understood that the light shielding unit 130 may be a light shielding metal layer or a black light shielding layer (BM) in the display panel, which is not limited in the embodiment of the present invention. Because the light transmittance of the first display area 100 is greater than the light transmittance of the second display area 200, the first display area 100 can be a transparent display area, including but not limited to a camera area under a screen or a fingerprint identification area, and the like, it is necessary to set the shading area of the first shading subunit 131 to be less than the shading area of the second shading subunit 132 in a unit area, so as to improve the light transmittance of the first display area 100, and further improve the display effect of the display panel.
It should be noted that, in the embodiment of the present invention, the number and the spacing gaps of the first light-shielding subunit 131 and the second light-shielding subunit 132 are not limited at all, and it is only required that the light-shielding area of the first light-shielding subunit 131 is smaller than the light-shielding area of the second light-shielding subunit 132 in a unit area.
Optionally, fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 12 is a schematic structural diagram of a cross section of fig. 11 along a direction B-B', and with reference to fig. 11 and fig. 12, the display panel further includes a third display area 300, where the third display area 300 surrounds at least a portion of the first display area 100, and the second display area 200 surrounds at least a portion of the third display area 300; the third display area 300 includes a third light emitting element 30, the third light emitting element 30 includes a third light emitting body 31, the third light emitting body 31 includes a third side light emitting surface 311, and the third side light emitting surface 311 includes a third side light emitting point E; along the thickness direction Z of the display panel, the relative position relationship between the third side light-emitting point E and the third side light-emitting surface 311 is the same as the relative position relationship between the first side light-emitting point C and the first side light-emitting surface 111; an included angle theta 3 between the tangent plane at the third side light-emitting point E and the substrate 140 is smaller than an included angle theta 2 between the tangent plane at the second side light-emitting point D and the substrate 140, and is larger than an included angle theta 1 between the tangent plane at the first side light-emitting point C and the substrate 140.
It is understood that the specific positional relationship among the first display area 100, the second display area 200 and the third display area 300 is not limited in any way in the embodiments of the present invention. Fig. 11 merely exemplarily shows that the third display area 300 surrounds the first display area 100 and the second display area 200 surrounds the third display area 300. The third display area 300 may be a transition area between the first display area 100 and the second display area 200.
Further, the light transmittance of the first display region 100 is greater than that of the second display region 200, and at this time, the light transmittance of the third display region 300 may be between the light transmittance of the first display region 100 and the light transmittance of the second display region 200.
Further, the third light emitting element 30 can be manufactured in the same process as the first light emitting element 10 and the second light emitting element 20, and has the same structure, which is not described herein again.
Further, along the thickness direction Z of the display panel, the relative position relationship between the third side light-emitting point E and the third side light-emitting surface 311 is the same as the relative position relationship between the first side light-emitting point C and the first side light-emitting surface 111; an included angle θ 3 between the cutting plane of the third side light-emitting point E and the substrate 140 is smaller than an included angle θ 2 between the cutting plane of the second side light-emitting point D and the substrate 140, and is greater than an included angle θ 1 between the cutting plane of the first side light-emitting point C and the substrate 140, so that the brightness of the viewing angle between the first display area 100 and the second display area 200 is transited through the third display area 300, thereby avoiding the occurrence of an obvious bright-dark boundary, so that the brightness uniformity of the display panel can be further improved, and further the display effect of the display panel is improved.
Optionally, as shown in fig. 12, the third light-emitting main body includes a fifth light-emitting surface close to one side of the substrate and a sixth light-emitting surface far away from one side of the substrate, and the brightness uniformity of the display panel is improved by setting the area of the fifth light-emitting surface to be larger than the area of the first light-emitting surface and setting the area of the fifth light-emitting surface to be smaller than the area of the second light-emitting surface, which is not repeated herein for the specific principle.
In another embodiment, the brightness uniformity of the display panel can be further improved by setting the area of the sixth light emitting surface to be smaller than the area of the third light emitting surface, and the area of the sixth light emitting surface to be larger than the area of the fourth light emitting surface, and the detailed description of the specific principle is omitted here.
Optionally, the display panel further includes a third color filter unit, the third color filter unit at least partially overlaps the third light emitting element in a thickness direction of the display panel, a distance between the first color filter unit and the first light emitting element is greater than a distance between the third color filter unit and the third light emitting element in the thickness direction of the display panel, and a distance between the third color filter unit and the third light emitting element is greater than a distance between the second color filter unit and the second light emitting element.
It can be understood that the third light emitting element 30 in the third display area 300 is disposed between the corresponding arrangement modes of the first display area 100 and the second display area 200, regardless of the thickness of the film layer, the change of the included angle between the tangent plane of the side light emitting surface and the substrate, the area of the light emitting surface, or the distance between the substrate or the color filter unit, so as to implement the transition between the first display area 100 and the second display area 200, ensure the uniformity of the display brightness of the display panel, and improve the display effect.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the display panel in any one of the embodiments, fig. 13 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and as shown in fig. 13, the display device 1 includes the display panel 2 in any one of the embodiments of the present invention, so that the display device 1 provided in the embodiment of the present invention has the technical effects of the technical solutions in any one of the embodiments, and the explanations of the structures and terms that are the same as or corresponding to the embodiments are not repeated herein. The display device 1 provided by the embodiment of the present invention may be a mobile phone shown in fig. 13, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
Optionally, as shown in fig. 13, the display device further includes a photosensitive structure 400, and the photosensitive structure 400 is disposed corresponding to the first display area 100. The photosensitive structure 400 includes, but is not limited to, a fingerprint sensor, a camera, or other photosensitive sensor.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A display panel is characterized by comprising a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area, and the second display area surrounds at least part of the first display area;
the first display region includes a first light emitting element including a first light emitting body, the second display region includes a second light emitting element including a second light emitting body;
the first light-emitting body comprises a first side light-emitting surface, the first side light-emitting surface comprises a first side light-emitting point, the second light-emitting body comprises a second side light-emitting surface, and the second side light-emitting surface comprises a second side light-emitting point; along the thickness direction of the display panel, the relative position relationship between the first side light-emitting point and the first side light-emitting surface is the same as the relative position relationship between the second side light-emitting point and the second side light-emitting surface;
and an included angle between a tangent plane at the first side light-emitting point and the substrate is smaller than an included angle between a tangent plane at the second side light-emitting point and the substrate.
2. The display panel according to claim 1, wherein the display panel further comprises a pixel defining layer, the pixel defining layer comprising a first pixel defining layer in the first display region and a second pixel defining layer in the second display region, the first light-emitting body being disposed in the first pixel defining layer, the second light-emitting body being disposed in the second pixel defining layer;
the thickness of the first pixel defining layer is smaller than that of the second pixel defining layer along the thickness direction of the display panel.
3. The display panel of claim 1, wherein the first light emitting body comprises a first light emitting face proximate to a side of the substrate, and the second light emitting body comprises a second light emitting face proximate to a side of the substrate;
the area of the first light emitting face is smaller than that of the second light emitting face.
4. The display panel of claim 1, wherein the first light emitting body comprises a third light emitting face away from the substrate side, and the second light emitting body comprises a fourth light emitting face away from the substrate side;
the area of the third light emitting surface is larger than that of the fourth light emitting surface.
5. The display panel of claim 1, wherein the first side light exit surface comprises a plurality of the first side light exit points;
in any two first side light-emitting points, an included angle between a tangent plane at the first side light-emitting point close to one side of the substrate and the substrate is larger than an included angle between a tangent plane at the first side light-emitting point far away from one side of the substrate and the substrate.
6. The display panel according to claim 1, wherein the display panel further comprises a first color filter unit and a second color filter unit;
the first color filter unit at least partially overlaps the first light emitting element, and the second color filter unit at least partially overlaps the second light emitting element in a thickness direction of the display panel;
in a thickness direction of the display panel, a distance between the first color filter unit and the first light emitting element is greater than a distance between the second color filter unit and the second light emitting element.
7. The display panel according to claim 6, wherein the display panel further comprises a first encapsulating structure and a second encapsulating structure, the first encapsulating structure being located between the first light emitting element and the first color filter unit, the second encapsulating structure being located between the second light emitting element and the second color filter unit in a thickness direction of the display panel; the first packaging structure comprises at least one first packaging layer, and the second packaging structure comprises at least one second packaging layer;
the first packaging structure is at least partially overlapped with the first light-emitting element, and the second packaging structure is at least partially overlapped with the second light-emitting element along the thickness direction of the display panel;
the thickness of the first packaging structure is larger than that of the second packaging structure along the thickness direction of the display panel.
8. The display panel of claim 7, wherein the first encapsulation layer comprises at least a first organic encapsulation layer and the second encapsulation layer comprises at least a second organic encapsulation layer;
the thickness of the first organic packaging layer is larger than that of the second organic packaging layer along the thickness direction of the display panel.
9. The display panel according to claim 6, wherein the first light-emitting body includes a first light-emitting surface near a side of the substrate and a third light-emitting surface far from the side of the substrate, and the second light-emitting body includes a second light-emitting surface near the side of the substrate and a fourth light-emitting surface far from the side of the substrate;
along the thickness direction of the display panel, the distance between the first light-emitting surface and the substrate is smaller than the distance between the second light-emitting surface and the substrate, and the distance between the third light-emitting surface and the substrate is smaller than the distance between the fourth light-emitting surface and the substrate.
10. The display panel according to claim 9, wherein the display panel further comprises a pixel defining layer and at least one organic insulating layer on a side of the pixel defining layer adjacent to the substrate;
at least a portion of the first light emitting body is disposed in the organic insulating layer, and at least a portion of the second light emitting body is disposed in the pixel defining layer.
11. The display panel according to claim 1, wherein the display panel further comprises a light shielding unit including a first light shielding sub-unit located in the first display region and a second light shielding sub-unit located in the second display region;
in a unit area, the light shielding area of the first light shielding subunit is smaller than that of the second light shielding subunit.
12. The display panel of claim 1, wherein the display panel further comprises a third display area, wherein the third display area surrounds at least a portion of the first display area, and wherein the second display area surrounds at least a portion of the third display area;
the third display area includes a third light emitting element including a third light emitting body including a third side light emitting surface including a third side light emitting spot;
along the thickness direction of the display panel, the relative position relationship between the third side light-emitting surface and the third side light-emitting surface is the same as the relative position relationship between the first side light-emitting surface and the first side light-emitting surface;
and an included angle between a tangent plane at the third side light-emitting point and the substrate is smaller than an included angle between a tangent plane at the second side light-emitting point and the substrate and is larger than an included angle between a tangent plane at the first side light-emitting point and the substrate.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
14. The display device according to claim 13, further comprising a photosensitive structure disposed corresponding to the first display region.
CN202210615767.XA 2022-05-31 2022-05-31 Display panel and display device Pending CN115000141A (en)

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CN202210615767.XA CN115000141A (en) 2022-05-31 2022-05-31 Display panel and display device

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