CN114447251A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN114447251A
CN114447251A CN202210106691.8A CN202210106691A CN114447251A CN 114447251 A CN114447251 A CN 114447251A CN 202210106691 A CN202210106691 A CN 202210106691A CN 114447251 A CN114447251 A CN 114447251A
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China
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emitting element
light
light emitting
functional layer
display panel
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CN202210106691.8A
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Chinese (zh)
Inventor
刘博智
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Xiamen Tianma Display Technology Co Ltd
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Xiamen Tianma Display Technology Co Ltd
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Priority to CN202210106691.8A priority Critical patent/CN114447251A/en
Publication of CN114447251A publication Critical patent/CN114447251A/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • 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
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • 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
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • 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

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The invention discloses a display panel and a display device. The display panel includes: a display area; the display area comprises a first display area and an optical component setting area; the display panel further includes: a base substrate; a plurality of light emitting elements on the substrate, the light emitting elements including a first light emitting element and a second light emitting element, the first light emitting element being located in the first display region, the second light emitting element being located in the optical component disposing region; the functional layers are positioned on one side, far away from the substrate, of the light-emitting element and comprise a first functional layer and a second functional layer; in the direction perpendicular to the plane of the substrate base plate, the first functional layer is at least partially overlapped with the first light-emitting element, and the second functional layer is at least partially overlapped with the second light-emitting element; at least a portion of the second functional layer has a thickness less than a thickness of the first functional layer. The embodiment of the invention can improve the color cast problem of the display panel and improve the display uniformity of the display panel, thereby improving the overall display effect of the display panel.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of display technology, the display device gradually progresses from a narrow frame to a frameless visual effect to improve the screen occupation ratio of the display device, and the optical sensor module of the display device with the high screen occupation ratio, such as a camera and an infrared sensor, is arranged in the display area of the display device.
For satisfying the printing opacity demand of optical sensor module for the setting region of optical sensor module has higher luminousness, and this makes the setting region of optical sensor module and other normal display area's luminousness have the difference, and then makes the luminous luminance in setting region of optical sensor module and other normal display area's luminous luminance have the difference, thereby influences the holistic display effect of display panel.
Disclosure of Invention
The invention provides a display panel and a display device, which aim to solve the technical problem that the whole display effect of the display panel is influenced due to different luminance of an optical component setting area and a normal display area.
According to an aspect of the present invention, there is provided a display panel including: a display area; the display area comprises a first display area and an optical component arrangement area;
the display panel further includes:
a substrate base plate;
a plurality of light emitting elements on the substrate base, the light emitting elements including a first light emitting element and a second light emitting element, the first light emitting element being located in the first display region, the second light emitting element being located in the optical component disposing region;
the functional layers are positioned on one side, away from the substrate, of the light-emitting element and comprise a first functional layer and a second functional layer; in a direction perpendicular to the plane of the base substrate, the first functional layer at least partially overlaps the first light-emitting element, and the second functional layer at least partially overlaps the second light-emitting element;
at least a portion of the second functional layer has a thickness less than a thickness of the first functional layer.
According to another aspect of the present invention, there is provided a display device including: the display panel is provided.
According to the technical scheme of the embodiment of the invention, at least part of the thickness of the second functional layer overlapped with the second light-emitting element of the optical component arrangement area is set to be smaller than at least part of the thickness of the first functional layer overlapped with the first light-emitting element of the first display area, at the moment, the light emitted by the second light-emitting element penetrates through the second functional layer with smaller thickness, so that the light emitted by the second light-emitting element has smaller loss after penetrating through the second functional layer, and the light emitted by the first light-emitting element needs to penetrate through the first functional layer with larger thickness, so that the light emitted by the first light-emitting element has relatively larger loss after penetrating through the first functional layer, and the luminance difference between the area where the first light-emitting element is located and the area where the second light-emitting element is located is neutralized, so that the display uniformity of the display panel is improved, and the display effect of the display panel is further improved. Meanwhile, after the brightness of the first light-emitting element and the second light-emitting element is compensated, the brightness attenuation conditions of the first light-emitting element and the second light-emitting element can be kept consistent under different viewing angles, namely, the brightness of the first light-emitting element and the brightness of the second light-emitting element are kept consistent under each viewing angle, so that the problem of viewing angle color cast of the display panel is solved, and the display effect of the display panel is improved.
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 top view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a film structure of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating a film structure of another display panel according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 14 is a diagram illustrating a film structure of another display panel according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 16 is a diagram illustrating a film structure of another display panel according to an embodiment of the present invention;
FIG. 17 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
fig. 18 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, 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.
As described in the background art, there is a difference in light transmittance between the arrangement region of the optical sensor module of the display panel having a high screen ratio and other normal display regions. In order to satisfy the requirement that the setting area of the optical sensor module has higher light transmittance, the structure of the light emitting element in the setting area of the optical sensor module or the structure of the pixel circuit for driving the light emitting element is usually adjusted, so that when the display panel displays a corresponding picture, the light emitting brightness of the setting area of the optical sensor module is lower than that of other normal display areas, the display uniformity of the display panel is affected, and the improvement of the display effect of the display panel is not facilitated.
To solve the above technical problem, an embodiment of the present invention provides a display panel, including: a display area; the display area comprises a first display area and an optical component arrangement area; the display panel further includes: a substrate base plate; a plurality of light emitting elements on the substrate, the light emitting elements including a first light emitting element and a second light emitting element, the first light emitting element being located in the first display region, the second light emitting element being located in the optical member disposing region; the functional layers are positioned on one side, far away from the substrate, of the light-emitting element and comprise a first functional layer and a second functional layer; in the direction perpendicular to the plane of the substrate base plate, the first functional layer is at least partially overlapped with the first light-emitting element, and the second functional layer is at least partially overlapped with the second light-emitting element; at least a portion of the second functional layer has a thickness less than a thickness of the first functional layer.
By adopting the technical scheme, at least part of the thickness of the second functional layer overlapped with the second light-emitting element of the optical component setting area is set to be smaller than at least part of the thickness of the first functional layer overlapped with the first light-emitting element of the first display area, at the moment, the light emitted by the second light-emitting element penetrates through the second functional layer with smaller thickness, so that the light emitted by the second light-emitting element has smaller loss after penetrating through the second functional layer, and the light emitted by the first light-emitting element needs to penetrate through the first functional layer with larger thickness, so that the light emitted by the first light-emitting element has relatively larger loss after penetrating through the first functional layer, and the brightness difference between the area where the first light-emitting element is located and the area where the second light-emitting element is located is neutralized, so that the display uniformity of the display panel is improved, and the display effect of the display panel is further improved. Meanwhile, after the brightness of the first light-emitting element and the second light-emitting element is compensated, the brightness attenuation conditions of the first light-emitting element and the second light-emitting element can be kept consistent under different viewing angles, namely, the brightness of the first light-emitting element and the brightness of the second light-emitting element are kept consistent under each viewing angle, so that the problem of viewing angle color cast of the display panel is solved, and the display effect of the display panel is improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic top view structure diagram of a display panel according to an embodiment of the present invention, fig. 2 is a schematic film structure diagram of a display panel according to an embodiment of the present invention, and referring to fig. 1 and fig. 2, a display area 110 of a display panel 100 includes a first display area 111 and an optical component disposing area 112; the optical component placement area 112 can be used for placing optical sensors, such as cameras, infrared sensors, and the like. Thus, by disposing the optical sensor in the optical component disposing area 112 of the display area, the corresponding optical sensor can be disposed in the display panel 100 without increasing the frame of the display panel 100, which is beneficial to narrowing the frame of the display panel 100, improving the screen occupation ratio of the display panel 100, and enabling the display device using the display panel 100 to have various functions.
The display panel 100 further includes a substrate 10, and a light emitting element 20 and a functional layer 30 sequentially disposed on one side of the substrate; the light emitting element 20 includes a first light emitting element 21 and a second light emitting element 22, and the first light emitting element 21 is located in the first display region 111, and the second light emitting element 22 is located in the optical member disposing region 112; the functional layer 30 includes a first functional layer 31 and a second functional layer 32, and in a direction Z perpendicular to the plane of the base substrate 10, the first functional layer 31 at least partially overlaps with the first light-emitting element 21, and the second functional layer 32 at least partially overlaps with the second light-emitting element 22, so that a part of light emitted by the first light-emitting element 21 can reach the display surface of the display panel 100 after passing through the first functional layer 31, and a part of light emitted by the second light-emitting element 22 can reach the display surface of the display panel 100 after passing through the second functional layer 32.
It should be noted that, in the embodiment of the present invention, the first functional layer 31 at least partially overlaps the first light-emitting element 21, that is, only a part of the first light-emitting element 21 may overlap the first functional layer 31, and another part of the first light-emitting element 21 does not overlap the first functional layer 31; all of the first light emitting elements 21 may overlap the first functional layer 31, and may be arranged according to actual needs, which is not specifically limited in the embodiment of the present invention. Likewise, the second functional layer 32 at least partially overlaps the second light emitting element 22, i.e. only a part of the second light emitting element 22 may overlap the second functional layer 32, while another part of the second light emitting element 22 does not overlap the second functional layer 32; all of the second light emitting elements 22 may overlap the second functional layer 32, and may be arranged according to actual needs, which is not specifically limited in the embodiment of the present invention.
For convenience of description, the embodiments of the present invention exemplarily explain the technical solutions of the embodiments of the present invention by taking as an example that all of the first light emitting elements 21 overlap the first functional layer 31 and all of the second light emitting elements 22 overlap the second functional layer 32 without specific explanation.
It will be appreciated that, since the light emitted by the first light-emitting element is partially lost during its transmission in the first functional layer, the light emitted by the second light-emitting element is also partially lost during its transmission in the second functional layer 32. If the thicknesses of the first functional layer and the second functional layer are the same (that is, the first functional layer and the second functional layer have the same structure of the film layers), the loss of light emitted by the first light-emitting element after passing through the first functional layer is the same as the loss of light emitted by the second light-emitting element after passing through the second functional layer. However, the difference between the luminance of the optical component setting area and the luminance of the first display area is caused by the difference between the light transmittances of the optical component setting area where the first light emitting element belongs and the first display area where the second light emitting element belongs, so that when the light emitting losses of the first light emitting element and the second light emitting element are the same, the luminance of the optical component setting area and the luminance of the first display area cannot be kept the same, which affects the display uniformity of the display panel and causes the display panel to have a four-direction color cast phenomenon.
With reference to fig. 3, in the embodiment of the invention, the thickness T2 of at least a portion of the second functional layer 32 overlapping with the second light emitting element 22 is set to be smaller than the thickness T1 of at least a portion of the first functional layer 31 overlapping with the first light emitting element 21, so that the light emitted by the second light emitting element 22 can have smaller loss after passing through the second functional layer 32 with smaller thickness T2, and the light emitted by the first light emitting element 21 has relatively larger loss after passing through the first functional layer 31 with larger thickness T1, so as to finally enable the first display area 111 where the first light emitting element 21 is located and the optical component arrangement area 112 where the second light emitting element 22 is located to have the same display luminance, thereby improving the display uniformity of the display panel and further improving the display effect of the display panel. Meanwhile, when the first display area 111 where the first light emitting element 21 is located and the optical component setting area 112 where the second light emitting element 22 is located have the same display luminance, the luminance attenuation conditions of the optical component setting area 112 where the first light emitting element 21 is located and the optical component setting area 112 where the second light emitting element 22 is located at different viewing angles can be kept the same, that is, the luminance attenuation conditions of the optical component setting area 112 where the first light emitting element 21 is located and the optical component setting area 112 where the second light emitting element 22 is located at each viewing angle are kept the same, so that the problem of viewing angle color cast of the display panel is improved, and the display effect of the display panel is further improved.
It should be noted that, in the embodiment of the present invention, at least a part of the thickness T2 of the second functional layer 32 is smaller than at least a part of the thickness T1 of the first functional layer 31, that is, all the thicknesses of the second functional layer 32 are smaller than the thickness of the first functional layer 31, or a part of the thickness of the second functional layer 32 is smaller than the thickness of the first functional layer 31, and the thickness of another part of the thickness of the second functional layer 32 may be greater than or equal to the thickness of the first functional layer 31, and on the premise that the final display luminance of the first light emitting element 21 and the final display luminance of the second light emitting element 22 can be kept consistent, the embodiment of the present invention is not particularly limited in this respect.
It should be further noted that fig. 2 is a drawing illustrating an embodiment of the present invention, fig. 2 illustrates only a relative positional relationship between the first display region 111 and the optical component disposing region 112, and for better illustrating a thickness relationship between the first functional layer and the second functional layer, the first functional layer and the second functional layer are exemplarily shown to be connected to each other; in an alternative embodiment of the present invention, the first functional layer and the second functional layer may not be connected to each other, and at this time, a transition region may also exist between the first display region and the optical component setting region, where the transition region may be used to set a corresponding circuit structure, and the circuit structure may include a pixel driving circuit and the like for driving the second light emitting element to emit light, which is not specifically limited in this embodiment of the present invention. Meanwhile, when the optical component arrangement area in the first display area has a transition area, the thickness of the functional layer located in the transition area may be the same as the thickness of the first functional layer in the first display area, may also be the same as the thickness of the second functional layer in the optical component arrangement area, or may also be between the thicknesses of the first functional layer in the first display area and the second functional layer in the optical component arrangement area.
For convenience of description, the schematic diagram of the film structure of the embodiment of the invention only shows the relative position relationship between the first display region 111 and the optical component disposing region, so as to exemplarily illustrate the technical solution of the embodiment of the invention
It is understood that, in the embodiment of the present invention, the structure of the display panel in the optical component disposing area is different from that of the display panel in the first display area, which may indicate that the density of the first light emitting elements in the optical component disposing area is less than that of the second light emitting elements in the first display area, that the structure of the pixel driving circuit in the optical component disposing area for driving the second light emitting elements to emit light for display is different from that of the pixel driving circuit in the first display area for driving the first light emitting elements to emit light for display, that the size of the second light emitting elements and/or the pixel driving circuit in the optical component disposing area is different from that of the first light emitting elements and/or the pixel driving circuit in the first display area, and that this is not specifically limited in the embodiment of the present invention
In an alternative embodiment, fig. 3 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention, fig. 4 is a schematic film structure diagram of another display panel provided in the embodiment of the present invention, and referring to fig. 3 and fig. 4 in combination, along a first direction X, a dimension a2 of the second light emitting element 22 is smaller than a dimension a1 of the first light emitting element 21, and the first direction X is parallel to a plane where the substrate 10 is located.
In this way, by setting the dimension a2 of the second light emitting element 22 in the first direction X in the optical component arrangement region 112 to be smaller than the dimension a1 of the first light emitting element 21 in the first direction X in the first display region 111, the occupied area of the second light emitting element 112 is smaller, and a larger gap is formed between two adjacent second light emitting elements 112, and the gap can be used as a light transmission region, that is, the optical component arrangement region 112 has a larger light transmission area, so that the light flux of the light transmission optical component arrangement region 112 is increased, and the light sensing requirement of the optical sensor arranged in the optical component arrangement region 112 is met; meanwhile, on the premise of ensuring that the optical member disposing region 112 has a high light transmittance, the number of light emitting elements disposed in the optical member disposing region 112 can be relatively increased, thereby improving the resolution of the display panel.
It should be noted that the first direction X mentioned in the embodiment of the present invention is a direction parallel to the plane of the substrate base plate 10, that is, when the light emitting elements 20 are arranged in the display area 110 in an array, the first direction may be a direction parallel to the row direction of the light emitting elements 20, may also be a direction parallel to the column direction of the light emitting elements 20, or may also be a direction intersecting both the row direction and the column direction of the light emitting elements 20, which is not particularly limited in this embodiment of the present invention.
Optionally, fig. 5 is a schematic diagram of a film structure of another display panel provided in an embodiment of the present invention, and as shown in fig. 5, the display panel further includes a light-shielding layer 40 located on a side of the light-emitting element 20 away from the substrate 10; the light shielding layer 40 includes a first hollow structure 401 corresponding to the first light emitting element 21 and a second hollow structure 402 corresponding to the second light emitting element 22; in a direction Z perpendicular to the plane of the substrate 10, the first hollow structure 401 and the first light emitting element 21 at least partially overlap, and the second hollow structure 402 and the second light emitting element 22 at least partially overlap.
Thus, the light shielding layer 40 is arranged on the side of the light emitting element 20 away from the substrate 10, the first hollow structure 401 corresponding to the first light emitting element 21 and the second hollow structure 402 corresponding to the second light emitting element 402 are respectively arranged in the light shielding layer 40, so that the light emitted by two adjacent light emitting elements 20 can be prevented from being mutually interfered to influence the light emitting effect of the display panel, and meanwhile, the position needing light shielding can be shielded, so that the display panel has a higher display effect.
It is understood that, since the light shielding layer 40 and the functional layer 30 are both located on the side of the light emitting element 20 facing away from the substrate 10, the functional layer 30 may be located between the light shielding layer 40 and the light emitting element 20 (as shown in fig. 5), or the functional layer 30 may also be located on the side of the light shielding layer 40 facing away from the substrate 10, or the light shielding layer 40 may be located between two adjacent film layers in the functional layer 30 (as shown in fig. 6). The embodiment of the present invention is not particularly limited to this. For convenience of description, in the embodiments of the present invention, the light shielding layer is disposed on a side of the functional layer 30 away from the base substrate 10, and the technical solutions of the embodiments of the present invention are exemplarily described.
Optionally, with reference to fig. 5, along the first direction X, the dimension b2 of the second hollow structure 402 is smaller than the dimension b1 of the first hollow structure 401, and the first direction X is parallel to the plane of the substrate base plate 10.
Specifically, since the dimension a2 of the second light emitting element 22 located in the optical component disposing region 112 is smaller than the dimension a1 of the first light emitting element 21 located in the first display region 111, the second hollow structure 402 corresponding to the second light emitting element 22 can have a relatively smaller dimension b2 to satisfy the light transmission requirement of the light emitted from the second light emitting element 22, and the first hollow structure 401 has a relatively larger dimension b1 to satisfy the light transmission requirement of the light emitted from the first light emitting element 21.
Meanwhile, when the size of the second hollow structure is set to be equal to the size of the first hollow structure, or the size of the second hollow structure is larger than the size of the first hollow structure, although the light-emitting angle of the first light-emitting element can be made to be equal to the light-emitting angle of the second light-emitting element, this brings other problems, for example, the size of the second hollow structure is too large, the exposed area is not only the setting area of the second light-emitting element, but also includes other areas of the driving circuit for driving the second light-emitting element, and the material of the driving circuit generally includes a metal layer with higher reflection capability, so that the reflection intensity at the second hollow structure is larger than the reflection intensity at the first hollow structure, thereby affecting the display uniformity of the display panel. Therefore, after the size of the second hollow structure is relatively reduced, the reflection condition of the second hollow structure is equivalent to that of the first hollow structure, and the display uniformity of the display panel can be improved.
It can be understood that, since the size of the second hollow structure is smaller than the size of the first hollow structure, and the size of the second light emitting element is smaller than the size of the first light emitting element, if the distance between the first light emitting element and the light shielding layer is the same as the distance between the second light emitting element and the light shielding layer, the light emitting angle of the first light emitting element is determined by the first hollow structure, and the light emitting angle of the second light emitting element is determined by the second hollow structure, so that the light emitting angle of the first light emitting element is greater than the light emitting angle of the second light emitting element, which causes the luminous flux of the light emitted by the first light emitting element to be greater than the luminous flux of the light emitted by the second light emitting element, so that the luminance of the first light emitting element is greater than the luminance of the second light emitting element, which affects the display uniformity of the display panel, and also causes the luminance attenuation degree of the first light emitting element to be different from the luminance of the second light emitting element at the same viewing angle, further, when the display panel displays a picture, color shift of a viewing angle occurs.
With continued reference to fig. 5, in the embodiment of the invention, when the functional layer 30 is located between the light shielding layer 40 and the light emitting element 20, the thickness T1 of the second functional layer 32 overlapping with the second light emitting element 22 is set to be smaller than the thickness of the first functional layer 31 overlapping with the first light emitting element 21, so that the second light emitting element 22 reaches the light shielding layer 40 through the second functional layer 32 with a smaller thickness and exits from the second hollow structure 402 of the light shielding layer 40, while the first light emitting element 21 reaches the light shielding layer 40 through the first functional layer 31 with a larger thickness and exits from the first hollow structure 401 of the light shielding layer 40. At this time, in an ideal state, if the thicknesses of the light shielding layer 40 in the optical member disposing region 112 and the first display region 111 are both T3, the size of the first light emitting element 21 in the first direction X is a1, the size of the second light emitting element 22 in the first direction X is a2, the size of the first hollow structure 401 in the first direction X is b1, the size of the second hollow structure 402 in the first direction X is b2, the thickness of the first functional layer 31 between the first light emitting element 21 and the light shielding layer 40 is T1, the thickness of the second functional layer 32 between the second light emitting element 22 and the light shielding layer 40 is T2, the light output angle θ 1 of the first light emitting element 21 at the first hollow structure 401 may be 2arctan (b1+ a1)/[2(T1+ T3) ], and the light output angle θ 2 of the second light emitting element 22 at the second hollow structure 402 is 2arctan (b1+ a1)/[ 2(T2+ T3) ] [ 84T 852 ], and because b1+ a1 is greater than b2+ a2, and T1 is greater than T2, by reasonably setting b1, a1, b2, a2, T1, and T2, (b1+ a1)/[2(T1+ T3) ] is equivalent to (b2+ a2)/[2(T2+ T3) ], that is, θ 1 is equivalent to θ 2, so that the light-emitting angles of the first light-emitting element 21 and the second light-emitting element 22 can be kept consistent, that is, the light fluxes of the light emitted by the first light-emitting element 21 and the second light-emitting element 22 are kept consistent, the display uniformity of the display panel is improved, and the problem of color cast of the viewing angle of the display panel can also be improved.
Optionally, fig. 7 is a schematic diagram of a film structure of another display panel provided in an embodiment of the present invention, and as shown in fig. 7, the light emitting element 20 includes a light emitting layer 202, and photons are excited by recombination of carriers in the light emitting layer 202, so that the light emitting element 20 emits light. In this way, the size of the light-emitting layer 202 in the light-emitting element 20 determines the size of the light-emitting region of the light-emitting element 20. At this time, in a direction Z perpendicular to the plane of the substrate 10, the first hollow structure 401 and the light emitting layer 202 of the first light emitting element 21 at least partially overlap, and the second hollow structure 402 and the light emitting layer 202 of the second light emitting element 22 at least partially overlap, so that the light generated by the light emitting layer 202 of the first light emitting element 21 can be emitted through the first hollow structure 401, and the light generated by the light emitting layer 202 of the second light emitting element 22 can be emitted through the second hollow structure 402.
With continued reference to fig. 7, the display panel further includes a pixel defining layer 60 including a plurality of opening structures corresponding to the light emitting elements 20, the opening structures being capable of defining the positions of the light emitting layers 202 of the light emitting elements 20. The light emitting element 20 further comprises an anode 201 and a cathode 203, and the light emitting element 202 may be positioned between the anode 201 and the cathode 203, such that the anode 201 and the cathode 203 may respectively provide the light emitting layer 202 with respective carriers, such that the light emitting element 20 emits light of a respective brightness. Usually, the cathode of each light emitting element 20 receives the same reference signal, and at this time, by adjusting the magnitude of the signal provided to the anode of each light emitting element 20, different light emitting elements 20 can emit light with corresponding brightness, and the light emitted by the light emitting elements 20 with different colors and different brightness are mixed with each other, so that the display panel presents a colorful picture.
Correspondingly, the display panel should further include a pixel circuit layer 50, the pixel circuit layer 50 is provided with a pixel driving circuit, the pixel driving circuit includes a first pixel driving circuit 51 and a second pixel driving circuit 52, the first pixel driving circuit 51 is used for driving the first light emitting element 21 to emit display light, and the second pixel driving circuit 52 is used for driving the second light emitting element 22 to emit display light. The first pixel driving circuit 51 is electrically connected to the anode 201 of the first light emitting element 21, so that the anode 201 of the first light emitting element 21 can present corresponding light emitting brightness according to the driving signal provided by the first pixel driving circuit 51, and the second pixel driving circuit 52 is electrically connected to the anode 201 of the second light emitting element 22, so that the anode 201 of the second light emitting element 22 can present corresponding light emitting brightness according to the driving signal provided by the second pixel driving circuit 52.
It should be noted that, in the drawings, only a structure of a thin film transistor is used instead of the structure of the pixel driving circuit, but the structure of the pixel driving circuit in the embodiment of the present invention is not limited thereto, and the pixel driving circuit may further include other active or passive devices, where the active device includes a transistor and the like, and the passive device includes a capacitor, a resistor, an inductor and the like. Meanwhile, the structure of the first pixel driving circuit may be the same as or different from the structure of the second pixel driving circuit, which is not specifically limited in this embodiment of the present invention.
It will be appreciated, with continued reference to fig. 7, that to ensure that each device in the pixel driving circuit (51 and 52) has a relatively high conductivity, the pixel circuit layer 50 will typically include a metal layer for providing a corresponding device structure, and the metal layer will typically have a certain reflectivity. At this time, if the intensity and/or the luminous flux of the external light entering the corresponding reflective layer from the first hollow structure 401 is different from the intensity and/or the luminous flux of the external light entering the corresponding reflective layer from the second hollow structure 402, the reflection intensity of the structure of the optical component setting area 112 to the external light and the reflection intensity of the structure of the first display area 111 to the external light have a larger difference, so that the display uniformity of the display panel is affected.
With reference to fig. 7, in the first direction X, in the embodiment of the invention, the size of the light emitting layer 202 of the first light emitting element 21 is a1, the size of the first hollow structure 401 is b1, the size of the light emitting layer 202 of the second light emitting element 22 is a2, and the size of the second hollow structure 402 is b 2; the first direction X is a direction parallel to the plane of the substrate base plate 10; wherein the difference between | b1-a1| and | b2-a2| is within a first preset range.
Specifically, | b1-a1| may be a size of a region of the first hollow structure 401 other than a region overlapping the light emitting layer 202 of the first light emitting element 21, that is, a size of a structure of the first hollow structure 401 other than the light emitting layer 202 of the first light emitting element 21, and | b2-a2| may be a size of a region of the second hollow structure 402 other than the region overlapping the light emitting layer 202 of the second light emitting element 22, that is, a size of a structure of the second hollow structure 402 other than the light emitting layer 202 of the second light emitting element 22, and when | b1-a1| and | b2-a2| have a small difference, a size of the structure of the first hollow structure 401 is equivalent to a size of the structure of the second hollow structure 402, it is ensured that external light reaching the corresponding metal reflective layer through the first hollow structure 401 and external light reaching the corresponding metal reflective layer through the second hollow structure 402 reach the external light reflective layer Light keeps unanimous, and the luminous flux that the metal reflecting layer sees through first hollow out construction 401 after to external light reflection keeps unanimous with the luminous flux that sees through the second hollow out construction, and then can make the reflection condition that optical component set up district 112 keep unanimous with the reflection condition that first display area 111, further can improve display panel's demonstration homogeneity. Where the value in the first predetermined range may be a value around 0, for example, the difference between | b1-a1| and | b2-a2| may be approximately equal to zero.
In an alternative embodiment, as shown in fig. 8, the pixel driving circuit 501 may be disposed only in the first display region 111, and the optical component disposing region 112 is not disposed with a corresponding pixel driving circuit, in this case, the second light emitting element 22 may be electrically connected to the pixel driving circuit 501 in the first display region 111 through a corresponding signal line, so as to reduce the area of the region where the optical component disposing region 112 needs to shield light, and meet the light transmission requirement of the optical component disposing region 112. It can be understood that, in general, the anode 201 of the light emitting element 20 is made of a metal with a higher reflective capability, and when the size of the anode 201 of the first light emitting element 21 exposed by the first hollow structure 401 is different from the size of the anode 201 of the second light emitting element 22 exposed by the second hollow structure 402, the reflection condition of the anode 201 of the first light emitting element 21 to the external light is different from the reflection condition of the anode 201 of the second light emitting element 22 to the external light, which also causes the reflection intensity of the structure of the optical component setting area 112 to the external light to be greatly different from the reflection intensity of the structure of the first display area 111 to the external light, thereby affecting the display uniformity of the display panel.
In another alternative embodiment, as shown in fig. 9, the display area of the display panel further includes a transition area 113 located between the first display area 111 and the optical component arrangement area 112, the pixel driving circuit for driving the first light emitting element 21 is arranged in the first display area 111, and the pixel driving circuit for driving the second light emitting element 22 is arranged in the transition area 113, and the optical component arrangement area is not provided with the corresponding pixel driving circuit; the transition region 113 may or may not be provided with a corresponding light emitting element, which is not specifically limited in this embodiment of the present invention. In this case, the display uniformity of the display panel is also affected.
Thus, when the difference between | b1-a1| and | b2-a2| is set within the first preset range, the external light reaching the corresponding metal reflective layer through the first hollow structure 401 and the external light reaching the corresponding metal reflective layer through the second hollow structure 402 can be kept consistent, and the luminous flux of the metal reflective layer after being reflected by the external light and penetrating through the first hollow structure 401 and the luminous flux of the metal reflective layer and penetrating through the second hollow structure are kept consistent, so that the reflection condition of the optical component setting area 112 and the reflection condition of the first display area 111 can be kept consistent, and the display uniformity of the display panel can be further improved.
Fig. 7, fig. 8, and fig. 9 are exemplary drawings of the embodiment of the present invention, and the film structure of the display panel is not limited to the cases shown in fig. 7 and fig. 8 on the premise of not affecting the core invention point of the embodiment of the present invention. For convenience of description, the embodiments of the present invention take the pixel driving circuit for driving the second light emitting element in the first display area as an example, and the technical solutions of the embodiments of the present invention are exemplarily described.
Optionally, fig. 10 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 10, the first functional layer 31 includes a first encapsulation layer 311 and a touch functional layer 312; the second functional layer 32 includes a second encapsulation layer 321; the touch function layer 312 includes a plurality of first touch electrodes 3121; in a direction perpendicular to the plane of the substrate board 10, the first encapsulation layer 311 covers the first light emitting element 21, and the second encapsulation layer 321 covers the second light emitting element 22.
Specifically, the first encapsulating layer 311 can protect the first light emitting element 21 to a certain extent, and the second encapsulating layer 321 can protect the second light emitting element 22 to a certain extent. The thickness of the first encapsulation layer 311 and the thickness of the second encapsulation layer 312 may be the same or different, which is not specifically limited in the embodiment of the present invention. In an alternative embodiment, the first encapsulation layer 311 and the second encapsulation layer 321 may be formed by the same material in the same process, so as to simplify the process of the display panel and reduce the manufacturing cost of the display panel.
Meanwhile, in the embodiment of the present invention, the first functional layer 31 includes the touch functional layer 312, and the first touch electrode 3121 in the touch functional layer 312 can receive a touch driving signal and/or feed back a touch detection signal, so that the display panel can implement a touch function. Since the optical component disposing area 112 is usually a relatively small area, when no corresponding touch functional layer is disposed in the optical component disposing area 112, the whole touch function of the display panel is not greatly affected, so that the optical component disposing area 112 may not be disposed with the corresponding touch functional layer, and the whole thickness of the second functional layer 32 in the optical component disposing area 112 is smaller than the whole thickness of the first functional layer 31 in the first display area 111, so as to satisfy the consistency of the display luminescence of the first light emitting element 21 and the second light emitting element 22, thereby being beneficial to improving the whole display effect of the display panel.
In addition, when the touch function layer is not disposed in the optical device disposing area 112, the area of the light-transmitting area of the optical component disposing area 112 is not additionally lost due to the disposition of the touch electrode, so that it can be determined that the optical component disposing area 112 has high light-transmitting performance, and the requirement of the optical component disposing area 112 for high light-transmitting performance is satisfied.
Optionally, fig. 11 is a schematic diagram of a film structure of another display panel provided in an embodiment of the present invention, and as shown in fig. 11, the first functional layer 31 further includes a first transparent insulating layer 313, and the second functional layer 32 further includes a second transparent insulating layer 322; in the direction perpendicular to the plane of the base substrate 10, the first transparent insulating layer 313 covers the first touch electrode 3121; the thickness of at least a portion of the second transparent insulating layer 322 is less than the thickness of at least a portion of the first transparent insulating layer 313.
Specifically, since the first functional layer 31 includes the first touch electrode 3121, the first transparent insulating layer 313 can protect the first touch electrode 3121 to a certain extent by providing the first transparent insulating layer 313 covering the first touch electrode 3121 in the first functional layer 31. Meanwhile, the second transparent insulating layer 322 may be disposed in the second functional layer 32, so that the number of film layers through which light emitted by the first light emitting element 21 can pass is equal to the number of film layers through which light emitted by the second light emitting element 22 can pass, and when the thickness of at least a part of the second transparent insulating layer 322 is set to be smaller than the thickness of at least a part of the first transparent insulating layer 321, the intensity of light emitted by the first light emitting element 21 can be kept consistent with the intensity of light emitted by the second light emitting element 22, thereby improving the display uniformity of the display panel. The first transparent insulating layer 313 and the second transparent insulating layer 322 may have the same material composition, for example, both the first transparent insulating layer 313 and the second transparent insulating layer 322 may be optical glue layers, and the first transparent insulating layer 313 and the second transparent insulating layer 322 may be prepared by the same process, and the first transparent insulating layer 313 and the second transparent insulating layer 322 have different thicknesses by controlling the glue dripping speed and the glue dripping amount in the preparation process.
Optionally, fig. 12 is a schematic diagram of a film structure of another display panel provided in the embodiment of the present invention, and as shown in fig. 12, the second functional 32 layer further includes at least one second touch electrode 323; the first touch electrode 3121 and the second touch electrode 323 are disposed on the same layer.
Specifically, the second touch electrode 323 and the first touch electrode 3121 are disposed on the same layer, so that the second touch electrode 323 also has a corresponding function of the first touch electrode 3121, that is, the second touch electrode 323 can also receive a corresponding touch driving signal and/or feed back a corresponding touch detection signal, so that the optical component disposing area 112 also has a corresponding touch function, and the second touch electrode 323 and the first touch electrode 3121 can be prepared from the same material under the same process condition, so as to simplify the process of the display panel and reduce the preparation cost of the display panel.
Optionally, with reference to fig. 12, in a direction Z perpendicular to the plane of the base substrate 10, the second touch electrode 323 and the second light emitting element 22 do not overlap with each other. In this way, the light emitted by the second light emitting element 22 can avoid the second touch electrode 323 to be emitted to the display surface of the display panel, so that the loss of the light emitted by the second light emitting element 22 can be reduced, the light emitting efficiency of the second light emitting element 22 can be further improved, and when the sizes of the first light emitting element 21 and the second light emitting element 22 are different, the consistency of the display luminance of the first light emitting element 21 and the second light emitting element 22 can be still ensured, and the display uniformity of the display panel can be improved.
It should be noted that, in the embodiment of the present invention, the first touch electrode 3121 may be a self-capacitance type touch electrode, and may also be a mutual capacitance type touch electrode; when the first touch electrode 3121 is a self-contained touch electrode, the first touch electrode 3121 will receive the touch driving signal and will also feed back the touch detection signal; when the first touch electrode 3121 is a mutual capacitance type touch electrode, the first touch electrode 3121 may be one of a touch driving electrode and a touch sensing electrode, and the other of the touch driving electrode and the touch sensing electrode may be reused with other existing film layers of the display panel or additionally provided with a corresponding touch electrode film layer; alternatively, when the first touch electrode 3121 is a mutual capacitance type touch electrode, the first touch electrode 3121 may include a touch sensing electrode and a touch driving electrode, which is not particularly limited in the embodiment of the present invention. Similarly, the second touch electrode 323 may be similar to the first touch electrode 3121, and is not described again.
In an alternative embodiment, as shown in fig. 13, the first light emitting element 21 may include first light emitting elements 211 and 212 having different light emitting wavelengths; the second light emitting element 22 may also include second light emitting elements 221 and 222 having different light emitting wavelengths; at this time, in the direction Z perpendicular to the plane of the base substrate 10, the thickness T11 of the first functional layer 31 overlapping the first light emitting element 211 and the thickness T12 of the first functional layer overlapping the first light emitting element 212 may be kept uniform (i.e., nearly the same), the thickness T21 of the second functional layer 32 overlapping the second light emitting element 221 and the thickness T22 of the second functional layer overlapping the second light emitting element 222 may remain uniform (i.e. nearly the same), while the thicknesses T21 and T22 of the second functional layer 32 overlapping the second light emitting elements 221 and 222 are each less than the thicknesses T11 and T12 of the first functional layer 31 overlapping the first light emitting elements 211 and 212, so that the loss of the light emitted from the second light emitting elements 221 and 222 after passing through the second functional layer 32 is less than the loss of the light emitted from the first light emitting elements 211 and 212 after passing through the first functional layer 31, thereby satisfying the requirement of display uniformity of the display panel.
In some special cases, the luminance attenuation of the light-emitting elements with different light-emitting wavelengths under the same viewing angle is different, which also causes color shift of the display panel, so that the thicknesses of the functional layers corresponding to the light-emitting elements with different light-emitting wavelengths in the same region can be adjusted in a targeted manner.
Optionally, fig. 14 is a schematic diagram of a film structure of another display panel provided in the embodiment of the present invention, and as shown in fig. 14, when the second light emitting element 22 may include a second light emitting element 221 having a first light emitting wavelength and a second light emitting element 222 having a second light emitting wavelength, and the first light emitting wavelength is different from the second light emitting wavelength, in a direction Z perpendicular to the plane of the base substrate 10, a thickness T21 of the second functional layer 32 overlapping with the second light emitting element 221 having the first light emitting wavelength is greater than a thickness T22 of the second functional layer 32 overlapping with the second light emitting element 222 having the second light emitting wavelength.
In this way, by setting the thickness T21 of the second functional layer 32 corresponding to the second light emitting element 221 having the first light emitting wavelength to be larger than the thickness T22 of the second functional layer 32 corresponding to the second light emitting element 222 having the second light emitting wavelength, the light emitted from the second light emitting element 221 having the first light emitting wavelength is transmitted through the second functional layer 32 having a larger thickness and reaches the display surface of the display panel, and the light emitted from the second light emitting element 222 having the first light emitting wavelength is transmitted through the second functional layer 32 having a smaller thickness and reaches the display surface of the display panel, so that the light emitted from the second light emitting element 222 having the second light emitting wavelength has a relatively smaller loss after being transmitted through the second functional layer 32, and the light emitted from the second light emitting element 221 having the first light emitting wavelength has a relatively larger loss after being transmitted through the second functional layer 32, so as to improve the luminance attenuation of the second light emitting element 22 having different light emitting wavelengths, the optical component setting area 112 has a problem of color shift of viewing angle, thereby improving the display uniformity of the optical component setting area 112 in the display panel.
Note that, when the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 221 is larger than the thickness T22 of the second functional layer 32 overlapping with the second light emitting element 222, the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 221 may be equivalent to the thickness (T11, T12) of the first functional layer 31 overlapping with the first light emitting element 21, and at this time, the thickness T22 of the second functional layer 32 overlapping only with the second light emitting element 222 is smaller than the thickness (T11, T12) of the first functional layer 31 overlapping with the first light emitting element 21.
In an alternative embodiment, as shown in fig. 15, on the premise that the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 211 is greater than the thickness T22 of the second functional layer 32 overlapping with the second light emitting element 222, the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 211 may be smaller than the thickness of the first functional layer 31 overlapping with the first light emitting element 21 (T11, T12).
Optionally, fig. 16 is a schematic diagram of a film structure of another display panel provided in the embodiment of the present invention, and as shown in fig. 16, the first light emitting element 21 may include a first light emitting element 211 having a first light emitting wavelength and a first light emitting element 212 having a second light emitting wavelength; wherein the first emission wavelength is different from the second emission wavelength; at this time, in the direction Z perpendicular to the plane of the base substrate 10, the thickness T11 of the first functional layer 31 overlapping with the first light-emitting element 211 of the first emission wavelength is larger than the thickness T12 of the first functional layer 31 overlapping with the first light-emitting element 212 of the second emission wavelength.
Specifically, by setting the thickness T11 of the first functional layer 31 of the first light emitting element 211 having the first light emitting wavelength to be larger than the thickness T12 of the first functional layer 31 of the first light emitting element 212 having the second light emitting wavelength, the light emitted from the first light emitting element 211 having the first light emitting wavelength passes through the first functional layer 31 having a larger thickness and reaches the display surface of the display panel, and the light emitted from the first light emitting element 212 having the second light emitting wavelength passes through the first functional layer 31 having a smaller thickness and reaches the display surface of the display panel, so that the light emitted from the first light emitting element 211 having the first light emitting wavelength has a relatively larger loss after passing through the first functional layer 31 and the light emitted from the first light emitting element 212 having the second light emitting wavelength has a relatively smaller loss after passing through the first functional layer 31, the luminance attenuation conditions due to the first light emitting element 21 having different light emitting wavelengths are improved, therefore, the first display area 111 has a color shift problem of viewing angle, so as to improve the display uniformity of the first display area 111 in the display panel.
Note that, when the thickness T11 of the first functional layer 31 overlapping with the first light emitting element 211 is larger than the thickness T12 of the first functional layer 31 overlapping with the first light emitting element 212, the thickness T12 of the first functional layer 31 overlapping with the first light emitting element 212 may be equivalent to the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 221.
In an alternative embodiment, as shown in fig. 17, on the premise that the thickness T11 of the first functional layer 31 overlapping with the first light emitting element 211 is greater than the thickness T12 of the first functional layer 31 overlapping with the first light emitting element 212, the thickness T21 of the second functional layer 32 overlapping with the second light emitting element 211 is smaller than the thickness (T11, T12) of the first functional layer 31 overlapping with the first light emitting element 21.
It can be understood that, in the embodiment of the present invention, the first light-emitting wavelength is different from the second light-emitting wavelength, that is, the first light-emitting wavelength is longer than the second light-emitting wavelength, or the second light-emitting wavelength is longer than the first light-emitting wavelength, and under the condition that the materials used for preparing the light-emitting elements are different, the luminance decay rate of the second light-emitting element with the first light-emitting wavelength is different from the luminance decay rate of the second light-emitting element with the second light-emitting wavelength. For example, on the premise that the first emission wavelength is different from the second emission wavelength, the first emission wavelength may include wavelengths of light of one or more colors of red, blue, and green, and the second emission wavelength may also include wavelengths of light of one or more colors of red, blue, and green, which is not specifically limited in this embodiment of the present invention.
Illustratively, the light emitting elements include a red light emitting element, a green light emitting element, and a blue light emitting element. When the first emission wavelength is longer than the second emission wavelength, the first emission wavelength may be a wavelength of light of any color longer than the first emission wavelength, that is, the first emission wavelength and the second emission wavelength are not limited to one emission wavelength, and if the first emission wavelength includes a wavelength of light of which emission color is red, the second emission wavelength may include a wavelength of light of which emission color is blue and/or a wavelength of light of which emission color is green, in this case, the first light emitting element 211 may include a red light emitting element, and the first light emitting element 212 may include a blue light emitting element and/or a green light emitting element; alternatively, if the first emission wavelength includes a wavelength of light whose emission color includes red and/or a wavelength of light whose emission color is green, the second emission wavelength may include a wavelength of light whose emission color is blue, in which case the first light-emitting element 211 may include a red light-emitting element and/or a green light-emitting element, and the first light-emitting element 212 may include a blue light-emitting element. In contrast, when the first emission wavelength is smaller than the second emission wavelength, if the first emission wavelength includes a wavelength of light having an emission color of blue and/or a wavelength of light having an emission color of green, the second emission wavelength may include a wavelength of light having an emission color of red, in this case, the first light emitting element 211 may include a blue light emitting element and/or a green light emitting element, and the first light emitting element 212 may include a red light emitting element; alternatively, if the first emission wavelength includes a wavelength including light having a blue emission color, and the second emission wavelength may include a wavelength including light having a red emission color and/or a wavelength including light having a green emission color, in this case, the first light emitting element 211 may include a blue light emitting element, and the first light emitting element 212 may include a red light emitting element and/or a green light emitting element.
Of course, in the embodiment of the present invention, the luminance attenuation conditions of the light emitted from the light emitting elements with different emission wavelengths are different, and therefore, the functional layers overlapping with the different emission wavelengths may be set to have different thicknesses according to the luminance attenuation conditions of the light emitting elements. In the case where the light-emitting element includes a red light-emitting element, a green light-emitting element, and a blue light-emitting element as an example, the thickness of the functional layer overlapping with the red light-emitting element, the thickness of the functional layer overlapping with the green light-emitting element, and the thickness of the functional layer overlapping with the blue light-emitting element may be provided in a stepwise manner.
It is to be understood that, the above description only exemplifies the light emitting elements including a red light emitting element, a green light emitting element, and a blue light emitting element, and the thickness of the functional layer overlapping the light emitting elements with different emission wavelengths is exemplarily described, but in the embodiment of the present invention, the emission wavelength of the light emitting element is not limited thereto, and the embodiment of the present invention is not particularly limited thereto.
Optionally, referring to any one of fig. 13 to 17, a color filter layer 70 is further disposed on a side of the functional layer 30 facing away from the base substrate 10, where the color filter layer 70 includes color blocks of different colors. In the direction perpendicular to the plane of the substrate 10, the color resist blocks (721, 722) in the optical component disposing region 112 overlap with the second light emitting elements 22 and are disposed corresponding to the second hollow structures, and the color resist blocks (712 and 722) in the first display region 111 overlap with the first light emitting elements 21 and are disposed corresponding to the first hollow structures. The wavelength of the light transmitted through the color block is related to the color of the color block, namely when the color block is of the first color, the light of the first color can only be transmitted; when the color block is in the second color, only the light of the second color can be transmitted; at this time, the color of the color resist block 711 overlapping with the first light emitting element 211 whose emission color is the first color, the color of the color resist block 721 overlapping with the second light emitting element 221 whose emission color is the first color, the color of the color resist block 712 overlapping with the first light emitting element 212 whose emission color is the second color, and the color of the color resist block 722 overlapping with the second light emitting element 222 whose emission color is the second color are the first color. In this manner, by providing the color filter layer 70, light of a corresponding color can be passed, and other stray light can be filtered, so that the accuracy of light emitted from each light-emitting element 20 can be ensured.
Based on the same inventive concept, embodiments of the present invention further provide a display device, wherein the display includes the display panel provided in the embodiments of the present invention, so that the display device provided in the embodiments of the present invention has the technical features of the display panel provided in the embodiments of the present invention, and can achieve the beneficial effects of the display panel provided in the embodiments of the present invention.
Optionally, fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 18, the display device 300 includes a display panel 100 and a sensor 200, where the sensor 200 is disposed corresponding to an optical component area of the display panel 100. The sensor 200 may include, but is not limited to, a camera, an infrared sensor, and the like.
It should be noted that the display device provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a smart wearable device (for example, a smart watch), and other display devices with an optical signal acquisition function, which may be known to those skilled in the art, and the embodiment of the present invention is not limited thereto
It should be understood that the various display panel and display device configurations shown above may be used, possibly in combination with each other. For example, the structures of the display panel and the display device described in the present invention may be present in parallel, or may be combined in different forms, and the present invention is not limited herein as long as the desired result of the technical solution of the present invention can be achieved.
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 (15)

1. A display panel, comprising: a display area; the display area comprises a first display area and an optical component arrangement area;
the display panel further includes:
a substrate base plate;
a plurality of light emitting elements on the substrate base, the light emitting elements including a first light emitting element and a second light emitting element, the first light emitting element being located in the first display region, the second light emitting element being located in the optical component disposing region;
the functional layers are positioned on one side, away from the substrate, of the light-emitting element and comprise a first functional layer and a second functional layer; in a direction perpendicular to the plane of the base substrate, the first functional layer at least partially overlaps the first light-emitting element, and the second functional layer at least partially overlaps the second light-emitting element;
at least a portion of the second functional layer has a thickness less than a thickness of the first functional layer.
2. The display panel according to claim 1, wherein a size of the second light emitting element is smaller than a size of the first light emitting element along a first direction, and the first direction is parallel to a plane in which the substrate base plate is located.
3. The display panel according to claim 1, further comprising a light-shielding layer on a side of the light-emitting element facing away from the base substrate; the light shielding layer comprises a first hollow structure corresponding to the first light-emitting element and a second hollow structure corresponding to the second light-emitting element;
in a direction perpendicular to a plane of the substrate base plate, the first hollow structure and the first light-emitting element are at least partially overlapped, and the second hollow structure and the second light-emitting element are at least partially overlapped.
4. The display panel according to claim 3, wherein the functional layer is located between the light shielding layer and the light emitting element.
5. The display panel according to claim 3, wherein the second hollow structure has a size smaller than that of the first hollow structure along a first direction, and the first direction is parallel to a plane of the substrate.
6. The display panel according to claim 3, wherein [01] the light-emitting element comprises a light-emitting layer;
in the direction perpendicular to the plane of the substrate base plate, the first hollow structure is at least partially overlapped with the light emitting layer of the first light emitting element, and the second hollow structure is at least partially overlapped with the light emitting layer of the second light emitting element;
in the first direction, the size of the light emitting layer of the first light emitting element is a1, the size of the first hollow structure is b1, the size of the light emitting layer of the second light emitting element is a2, and the size of the second hollow structure is b 2; the first direction is a direction parallel to the plane of the substrate base plate;
wherein the difference between | b1-a1| and | b2-a2| is within a first preset range.
7. The display panel of claim 1, wherein the first functional layer comprises a first encapsulation layer and a touch functional layer; the second functional layer comprises a second encapsulation layer;
in the direction perpendicular to the plane of the substrate base plate, the first packaging layer covers the first light-emitting element, and the second packaging layer covers the second light-emitting element;
the touch function layer includes a plurality of first touch electrodes.
8. The display panel according to claim 7, wherein the first functional layer further comprises a first transparent insulating layer, and the second functional layer further comprises a second transparent insulating layer;
in the direction perpendicular to the plane of the substrate base plate, the first transparent insulating layer covers the first touch electrode;
at least a portion of the second transparent insulating layer has a thickness less than a thickness of at least a portion of the first transparent insulating layer.
9. The display panel of claim 8, wherein the second functional layer further comprises at least one second touch electrode; the first touch electrode and the second touch electrode are arranged on the same layer.
10. The display panel according to claim 9, wherein the second touch electrode and the second light emitting element do not overlap with each other in a direction perpendicular to a plane of the base substrate.
11. The display panel according to claim 1, wherein the first light-emitting element includes a first light-emitting element of a first light-emitting wavelength and a first light-emitting element of a second light-emitting wavelength; the first emission wavelength is different from the second emission wavelength;
in a direction perpendicular to a plane of the base substrate, a thickness of the first functional layer overlapping with the first light emitting element of the first emission wavelength is larger than a thickness of the first functional layer overlapping with the first light emitting element of the second emission wavelength.
12. The display panel according to claim 1, wherein the second light-emitting element includes a second light-emitting element of a first emission wavelength and a second light-emitting element of a second emission wavelength; the first emission wavelength is different from the second emission wavelength;
in a direction perpendicular to a plane of the base substrate, a thickness of the second functional layer overlapping with the second light emitting element of the first emission wavelength is larger than a thickness of the second functional layer overlapping with the second light emitting element of the second emission wavelength.
13. The display panel according to claim 11 or 12, wherein the first emission wavelength includes wavelengths of light of one or more colors of red, blue, and green, and the second emission wavelength includes wavelengths of light of one or more colors of red, blue, and green.
14. A display device, comprising: the display panel of any one of claims 1-13.
15. The display device according to claim 14, further comprising: a sensor;
the sensor is arranged corresponding to the optical component area.
CN202210106691.8A 2022-01-28 2022-01-28 Display panel and display device Pending CN114447251A (en)

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