CN113809135A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113809135A CN113809135A CN202111070460.8A CN202111070460A CN113809135A CN 113809135 A CN113809135 A CN 113809135A CN 202111070460 A CN202111070460 A CN 202111070460A CN 113809135 A CN113809135 A CN 113809135A
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- 239000010410 layer Substances 0.000 claims abstract description 139
- 239000000758 substrate Substances 0.000 claims abstract description 62
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- 238000001704 evaporation Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 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
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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Abstract
The invention provides a display panel and a display device, comprising a display area, wherein the display area comprises a first display area and a second display area; the pixel structure comprises a substrate and a plurality of pixel units positioned on one side of the substrate; the pixel unit positioned in the first display area comprises a plurality of first sub-pixels, and the pixel unit positioned in the second display area comprises a plurality of second sub-pixels; the first sub-pixel comprises a first electrode and a first light-emitting function layer, and the first electrode is positioned between the first light-emitting function layer and the substrate; the first electrode comprises a plurality of first sub-electrodes, and a first interval is formed between every two adjacent first sub-electrodes; the first light-emitting functional layer comprises a plurality of first secondary light-emitting functional layers with the same light-emitting color, and a second interval is formed between every two adjacent first secondary light-emitting functional layers; the first spacing at least partially overlaps the second spacing in a direction perpendicular to the substrate. The invention improves the transmittance of the first display area and the light quantity projected to the light sensing element on the basis of not sacrificing the resolution of the first display area.
Description
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 technologies, display devices (such as mobile phones) are increasingly developed toward an ultra-large screen ratio (i.e., a ratio of a display area to a front surface of the entire display device), even full-screen display, and therefore, how to improve the screen ratio of the display device becomes a research focus of those skilled in the art.
In order to realize full-screen display, some light sensing elements (such as a front camera or a fingerprint identification device) in the display device are often disposed below the transparent screen. When the light sensing element does not work, the transparent screen displays a picture; when the light sensing element works, the transparent screen is transparent. However, in order to increase the amount of light projected onto the light-sensing elements, the resolution of the transparent screen needs to be sacrificed.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for improving the transmittance of a first display area and increasing the quantity of light projected to a light sensing element on the basis of not sacrificing the resolution of the first display area.
In a first aspect, an embodiment of the present invention provides a display panel, including a display area, where the display area includes a first display area and a second display area;
the pixel structure comprises a substrate and a plurality of pixel units positioned on one side of the substrate; the pixel unit positioned in the first display area comprises a plurality of first sub-pixels, and the pixel unit positioned in the second display area comprises a plurality of second sub-pixels;
the first sub-pixel comprises a first electrode and a first light-emitting function layer, and the first electrode is positioned between the first light-emitting function layer and the substrate; the first electrode comprises a plurality of first sub-electrodes, and a first interval is formed between every two adjacent first sub-electrodes; the first light-emitting functional layer comprises a plurality of first secondary light-emitting functional layers with the same light-emitting color, and a second interval is formed between every two adjacent first secondary light-emitting functional layers; the first spacing at least partially overlaps the second spacing in a direction perpendicular to the substrate.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel described in the first aspect.
The embodiment of the invention provides a display panel. The display panel includes a first display region and a second display region. The first display region includes a first subpixel including a first electrode and a first light emitting function layer. The first electrode includes a plurality of first sub-electrodes with a first interval between adjacent first sub-electrodes. The first light emitting function layer comprises a plurality of first light emitting function layers, and a second interval exists between every two adjacent first light emitting function layers. The first electrode is divided into the first sub-electrodes arranged at intervals, the first light-emitting function layer is divided into the first light-emitting function layers arranged at intervals, and light can penetrate through the first intervals and the second intervals and is projected to one side, facing the substrate, of the first sub-pixel, so that the transmittance of the first display area is improved on the basis that the resolution of the first display area is not sacrificed, and the quantity of the light projected to the light sensing element is increased.
Drawings
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken along a portion of FIG. 1;
FIG. 3 is a schematic cross-sectional view along AA' of FIG. 2;
fig. 4 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view taken along the direction BB' in FIG. 7;
fig. 9 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
fig. 11 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view taken along the direction CC' of FIG. 11;
fig. 13 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
fig. 15 is a schematic top view of another display panel according to an embodiment of the invention;
fig. 16 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
fig. 17 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
fig. 18 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
fig. 19 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
FIG. 20 is a schematic sectional view taken along direction DD' in FIG. 19;
fig. 21 is a schematic top view illustrating another display panel according to an embodiment of the present invention;
fig. 22 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
fig. 23 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, fig. 2 is an enlarged view of a portion of the display panel shown in fig. 1, and fig. 3 is a schematic cross-sectional view along an AA' direction in fig. 2. referring to fig. 1, fig. 2 and fig. 3, the display panel includes a display area 100, and the display area 100 includes a first display area 101 and a second display area 102. The display panel includes a substrate 30 and a plurality of pixel units located at one side of the substrate 30. The pixel unit is a basic unit for light emitting display in the display panel, and the pixel unit comprises a plurality of sub-pixels with different light emitting colors. By controlling the luminance of the sub-pixels of each light-emitting color in the pixel unit, the pixel unit can realize various different light-emitting colors and various different luminance. In one embodiment, the pixel unit may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel. In another embodiment, the pixel unit may include a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel. The pixel unit located in the first display region 101 includes a plurality of first sub-pixels 10, and the pixel unit located in the second display region 102 includes a plurality of second sub-pixels 20. The first subpixel 10 includes a first electrode 11 and a first light emitting functional layer 12, and the first electrode 11 is positioned between the first light emitting functional layer 12 and the substrate 30. The first electrode 11 includes a plurality of first sub-electrodes 110, and adjacent first sub-electrodes 110 have a first interval G1 therebetween. The first light emission function layer 12 includes a plurality of first sub-light emission function layers 120 having the same emission color, and a second interval G2 is provided between adjacent first sub-light emission function layers 120. The first spacing G1 at least partially overlaps the second spacing G2 in a direction perpendicular to the substrate 30.
The embodiment of the invention provides a display panel. The display panel includes a first display area 101 and a second display area 102. The first display region 101 includes a first sub-pixel 10, and the first sub-pixel 10 includes a first electrode 11 and a first light emitting function layer 12. The first electrode 11 includes a plurality of first sub-electrodes 110, and a first interval G1 exists between adjacent first sub-electrodes 110. The first light emission function layer 12 includes a plurality of first secondary light emission function layers 120, and a second gap G2 exists between adjacent first secondary light emission function layers 120. Since the first electrode 11 is divided into the first sub-electrodes 110 arranged at intervals and the first light-emitting functional layer 12 is divided into the first light-emitting functional layers 120 arranged at intervals, light can be transmitted through the first interval G1 and the second interval G2 and projected to the side of the first sub-pixel 10 facing the substrate 30, so that the transmittance of the first display area 101 is improved and the quantity of light projected to the light sensing element is improved on the basis of not sacrificing the resolution of the first display area 101.
For example, referring to fig. 1-3, the display panel further includes a light sensing element 40, and the light sensing element 40 is located in the first display area 101. The photosensitive element 40 is located on the side of the first electrode 11 facing the substrate 30. The transmittance of the first display area 101 is greater than that of the second display area 102, so as to increase the amount of light projected onto the light-sensing element 40.
Exemplarily, referring to fig. 1 to 3, the display panel includes a scan line 31 and a data line 32. The plurality of scanning lines 31 extend in a first direction and are arranged in a second direction. The plurality of data lines 32 extend in the second direction and are arranged in the first direction. The display panel includes a gate insulating layer 33, an interlayer insulating layer 34, and a passivation layer 35, which are sequentially stacked. The gate insulating layer 33 is positioned between the substrate 30 and the interlayer insulating layer 34, and the passivation layer 35 is positioned between the interlayer insulating layer 34 and the pixel defining layer 36.
Fig. 4 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 4, a plurality of first sub-electrodes 110 are arranged in an array along a first direction and a second direction, where the first direction intersects the second direction. The plurality of first sub-electrodes 110 arranged in an array may be arranged in M rows and N columns, where M and N are positive integers. In one embodiment, the first direction is perpendicular to the second direction. In another embodiment, the first direction and the second direction form an angle greater than 0 ° and less than 90 °. The display panel further includes a first connection line 111, and two first sub-electrodes 110 adjacent in the first direction are electrically connected through the first connection line 111. In the embodiment of the present invention, the plurality of first sub-electrodes 110 arranged in the first direction are electrically connected by the first connection line 111, so that the same voltage is supplied to the plurality of first sub-electrodes 110 arranged in the first direction.
Alternatively, referring to fig. 4, the display panel includes a first connection line 111, the first connection line 111 is disposed in the same layer as the first sub-electrodes 110, and the first connection line 111 is located between two adjacent first sub-electrodes 110 in the first direction. In the embodiment of the invention, the first connection line 111 and the first sub-electrode 110 are disposed at the same layer, and the first connection line 111 and the first sub-electrode 110 may be formed by using the same material and in the same process, thereby saving the process.
Fig. 5 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 5, a plurality of first sub-electrodes 110 are arranged in an array along a first direction and a second direction, where the first direction intersects the second direction. The display panel further includes a second connection line 112, and two first sub-electrodes 110 adjacent in the second direction are electrically connected by the second connection line 112. In the embodiment of the present invention, the plurality of first sub-electrodes 110 arranged in the second direction are electrically connected by the second connection line 112, so that the same voltage is supplied to the plurality of first sub-electrodes 110 arranged in the second direction.
Optionally, referring to fig. 5, the display panel includes a second connection line 112, the second connection line 112 is disposed in the same layer as the first sub-electrodes 110, and the second connection line 112 is located between two adjacent first sub-electrodes 110 in the second direction. In the embodiment of the invention, the second connection line 112 and the first sub-electrode 110 are disposed at the same layer, and the second connection line 112 and the first sub-electrode 110 can be formed by using the same material and in the same process, thereby saving the process.
Fig. 6 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, and referring to fig. 6, the display panel further includes a first connection line 111 and a second connection line 112, two first sub-electrodes 110 adjacent to each other along a first direction are electrically connected through the first connection line 111, and two first sub-electrodes 110 adjacent to each other along a second direction are electrically connected through the second connection line 112. In the embodiment of the present invention, the plurality of first sub-electrodes 110 arranged along the first direction are electrically connected by the first connection line 111, and the plurality of first sub-electrodes 110 arranged along the second direction are electrically connected by the second connection line 112, so that all the first sub-electrodes 110 in the same first sub-pixel 10 are electrically connected, and the same voltage is provided to all the first sub-electrodes 110 in the same first sub-pixel 10.
Alternatively, referring to fig. 6, the display panel includes a first connection line 111 and a second connection line 112, the first connection line 111 and the second connection line 112 are disposed in the same layer as the first sub-electrodes 110, the first connection line 111 is located between two adjacent first sub-electrodes 110 in the first direction, and the second connection line 112 is located between two adjacent first sub-electrodes 110 in the second direction. In the embodiment of the present invention, the first connecting line 111, the second connecting line 112 and the first sub-electrode 110 are disposed at the same layer, and the first connecting line 111, the second connecting line 112 and the first sub-electrode 110 may be formed by using the same material and in the same process, thereby saving the process.
Fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention, and fig. 8 is a schematic cross-sectional view taken along the direction BB' in fig. 7, and referring to fig. 7 and 8, the display panel includes a second connecting line 112. The plurality of first sub-electrodes 110 arranged in the second direction overlap the same second connection line 112 in a direction perpendicular to the substrate 30. In the embodiment of the present invention, the second connection line 112 is located between the first electrode 11 and the substrate 30, and the second connection line 112 is overlapped and electrically connected with the plurality of first sub-electrodes 110 arranged along the second direction, so as to provide the same voltage to the plurality of first sub-electrodes 110 arranged along the second direction. It should be noted that, in order to illustrate the overlapping relationship between the first sub-electrode 110 and the second connection line 112, that is, to make the second connection line 112 not be completely blocked by the first sub-electrode 110 along the first direction, the width of the second connection line 112 along the first direction is set to be larger than the width of the first sub-electrode 110 along the first direction. In an actual display panel, the width of the second connection line 112 along the first direction may also be less than or equal to the width of the first sub-electrode 110 along the first direction.
Exemplarily, referring to fig. 8, the second sub-electrode 120 overlapping the second connection line 112 and the second sub-electrode 120 not overlapping the second connection line 112 are disposed in the same layer. In each embodiment of the invention, the arrangement of the same layer or layers means that the same material is adopted and formed in the same process film layer. In the embodiment shown in fig. 8, in order to make the second sub-electrode 120 overlapping the second connection line 112 and the second sub-electrode 120 not overlapping the second connection line 112 have the same upper and lower film layer positions, i.e., in order to make the second sub-electrode 120 overlapping the second connection line 112 and the second sub-electrode 120 not overlapping the second connection line 112 lie in the same plane, a convex structure may also be provided below the second sub-electrode 120 not overlapping the second connection line 112. The protruding structure may be a portion of the passivation layer 35 protruding toward the first sub-electrode 110. In another embodiment, after forming the second connection line 112, a metal film may be directly formed, and a plurality of second sub-electrodes 120 are formed through an etching process, wherein a portion of the second sub-electrodes 120 is formed on the second connection line 112, and another portion of the second sub-electrodes 120 is formed on the passivation layer 35.
Fig. 9 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 9, the display panel includes a first connecting line 111. The plurality of first sub-electrodes 110 arranged in the first direction overlap the same first connection line 111 in a direction perpendicular to the substrate 30. The first connection line 111 is positioned between the first electrode 11 and the substrate 30, and the first connection line 111 is overlapped and electrically connected with the plurality of first sub-electrodes 110 arranged in the first direction, thereby supplying the same voltage to the plurality of first sub-electrodes 110 arranged in the first direction.
In another embodiment, the display panel includes a first connection line 111 and a second connection line 112. The plurality of first sub-electrodes 110 arranged in the first direction overlap the same first connection line 111 and the plurality of first sub-electrodes 110 arranged in the second direction overlap the same second connection line 112 in a direction perpendicular to the substrate 30, thereby supplying the same voltage to all the first sub-electrodes 110 in the same first sub-pixel 10.
Exemplarily, referring to fig. 7 and 8, the second connection line 112 electrically connects the plurality of first sub-electrodes 110 arranged in the second direction as a first sub-electrode string, and the plurality of first self-electrode strings may be electrically connected to the same connection point, thereby supplying the same voltage to all the first sub-electrodes 110 in the same first sub-pixel 10. Similarly, the first connection line 111 electrically connects the plurality of first sub-electrodes 110 arranged in the first direction as a first sub-electrode string, and the plurality of first sub-electrode strings may be electrically connected to the same connection point.
Exemplarily, referring to fig. 7 and 8, the second connection line 112 includes a transparent conductive material, for example, indium tin oxide, so that the blocking of light by the second connection line 112 can be reduced, and the light transmittance of the first display region 101 can be further improved. Similarly, the first connection line 111 may also include a transparent conductive material. Wherein the transparent conductive material is transparent to the light band received by the light sensing element 40. That is, the light-sensitive element 40 has a high transmittance, for example, the transparent conductive material has a transmittance of more than 95% or more than 99% for the light received by the light-sensitive element 40. The light-sensing element 40 may use visible light as its operating light band and/or infrared light as its operating light band. The transparent conductive material has a high transmittance to visible light and/or infrared light, for example, a transmittance of more than 95% or more than 99%.
Optionally, referring to fig. 3, the display panel further includes a pixel defining layer 36, and the pixel defining layer 36 is located on a side of the first electrode 11 away from the substrate 30. The pixel defining layer 36 has a plurality of first openings 361 in the first display region 101 and the second display region 102 (fig. 3 illustrates that one first opening 361 of the pixel defining layer 36 is formed in the first display region 101, and one first opening 361 of the pixel defining layer 36 is formed in the second display region 102). The plurality of first sub-light emitting functional layers 120 in the same first sub-pixel 10 are located in the same first opening 361, and the second sub-pixel 20 is located in one of the first openings 361 corresponding to the first sub-pixel. In the embodiment of the present invention, the display panel further includes the pixel defining layer 36, and the pixel defining layer 36 has a plurality of first openings 361 in the first display area 101 and the second display area 102, so that the pixel defining layer 36 can be adapted to the plurality of first light emitting functional layers 120 without changing a manufacturing process of the pixel defining layer 36, thereby reducing a process difficulty of manufacturing the display panel.
Exemplarily, referring to fig. 3, all the first sub-light emitting function layers 120 in the same first sub-pixel 10 are located in the same first opening 361.
Fig. 10 is a schematic cross-sectional structural view of another display panel according to an embodiment of the present invention, and referring to fig. 10, the display panel further includes a pixel defining layer 36, the pixel defining layer 36 has a plurality of second openings 362 in the first display region 101, and the pixel defining layer 36 has a plurality of first openings 361 in the second display region 102 (fig. 10 illustrates that one first opening 361 is formed in the second display region 102 by the pixel defining layer 36). The first sub-light emitting function layer 120 is located in the second openings 362 corresponding to one of the first sub-pixels, and the second sub-pixels 20 are located in the first openings 361 corresponding to one of the second sub-pixels. In the embodiment of the present invention, the pixel defining layer 36 has the second opening 362 in the first display region 101, and the second opening 362 is used for accommodating the first secondary light emitting function layer 120 corresponding to one of the second openings, so that the adjacent first secondary light emitting function layers 120 are spaced by the pixel defining layer 36, and mutual influence of the first secondary light emitting function layers 120 in the evaporation process is avoided. Further, the first light-emitting functional layer 120 is formed in the second opening 362 matched with the size of the first light-emitting functional layer, and the second opening 362 defines the position of the first light-emitting functional layer 120, so that the first light-emitting functional layer 120 is prevented from moving and falling off when the display panel is subjected to an acting force such as collision, and the working stability of the display panel is improved.
Fig. 11 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, and fig. 12 is a schematic cross-sectional structure diagram along a direction CC' in fig. 11, referring to fig. 11 and fig. 12, the first sub-pixel 10 further includes a second electrode 13, and the second electrode 13 is located on a side of the first light-emitting functional layer 12 away from the substrate 30. The second electrode 13 includes a plurality of second sub-electrodes 130, and a third interval G3 is between adjacent second sub-electrodes 130. In a direction perpendicular to the substrate 30, the third gap G3 at least partially overlaps the first gap G1, and the third gap G3 at least partially overlaps the second gap G2. In the embodiment of the present invention, the second electrode 13 includes a plurality of second sub-electrodes 130, and a third gap G3 exists between adjacent second sub-electrodes 130, and since the second electrode 13 is divided into a plurality of second sub-electrodes 130 arranged at intervals, light can pass through the first gap G1, the second gap G2 and the third gap G3 and be projected to the side of the first sub-pixel 10 facing the substrate 30, so as to further reduce the blocking and absorption of light by the second electrode 13, improve the transmittance of the first display area 101, and improve the amount of light projected to the photo sensor 40.
Alternatively, referring to fig. 11 and 12, the second sub-electrodes 130 have an elongated shape, and the plurality of second sub-electrodes 130 extend in the second direction and are arranged in the first direction. In one embodiment, the plurality of second sub-electrodes 130 may also extend in the first direction and be arranged in the second direction. In another embodiment, the plurality of second sub-electrodes 130 extend along the second direction and are arranged along the first direction, and the plurality of second sub-electrodes 130 may also extend along the first direction and are arranged along the second direction, such that the second sub-electrodes 130 cross in the first direction and the second direction to form a grid. The second subpixel 20 includes a third electrode 21, a second light-emitting functional layer 22, and a fourth electrode 23. The third electrode 21 is located between the substrate 30 and the second light emission function layer 22, and the second light emission function layer 22 is located between the third electrode 21 and the fourth electrode 23. The at least one second sub-electrode 130 is integrally formed with the at least one fourth electrode 23. In the embodiment of the present invention, the at least one second sub-electrode 130 and the at least one fourth electrode 23 are disposed in the same layer and electrically connected, so that the second sub-electrode 130 and the fourth electrode 23 electrically connected to each other have the same voltage. When the at least one second sub-electrode 130 and the at least one fourth electrode 23 are disposed on the same layer, the second sub-electrode 130 and the fourth electrode 23 disposed on the same layer may be made of the same material and formed in the same process, thereby saving the process.
Exemplarily, referring to fig. 12, the first electrode 11 is disposed in the same layer as the third electrode 21, the first light emission function layer 12 is disposed in the same layer as the second light emission function layer 22, and the second electrode 13 is disposed in the same layer as the fourth electrode 23.
Alternatively, referring to fig. 11 and 12, all the third electrodes 21 overlap the same fourth electrode 23 in a direction perpendicular to the substrate 30. That is, in the second display region 102, all the second sub-pixels 20 share the same fourth electrode 23. The fourth electrode 23 is disposed over the entire surface of the second display region 102, so that the fourth electrode 23 can cover all of the third electrode 21 and the second light emission function layer 22, and the second light emission function layer 22 emits light under the common driving of the third electrode 21 and the fourth electrode 23.
Fig. 13 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 12 and 13, a plurality of second sub-electrodes 130 extend along a second direction and are arranged along a first direction. The plurality of third electrodes 21 arranged in the second direction overlap the same fourth electrode 23 in a direction perpendicular to the substrate 30. In the embodiment of the invention, the original whole electrode layer is provided with a plurality of electrode strips, and the electrode strips extend along the second direction and are arranged along the first direction. The portion of the electrode bar located in the first display region 101 is the second sub-electrode 130, and the portion of the electrode bar located in the second display region 102 is the fourth electrode 23.
In one embodiment, the plurality of second sub-electrodes 130 extend in a first direction and are arranged in a second direction, perpendicular to the substrate 30, and the plurality of third electrodes 21 arranged in the first direction overlap the same fourth electrode 23.
Fig. 14 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 14, for clarity, a long frame is used in fig. 14 to select one electrode bar extending along a first direction and one electrode bar extending along a second direction. The plurality of second sub-electrodes 130 extend in the second direction and are arranged in the first direction. The plurality of third electrodes 21 arranged in the second direction overlap the same fourth electrode 23 in a direction perpendicular to the substrate 30. The plurality of second sub-electrodes 130 extend in the first direction and are arranged in the second direction, perpendicular to the direction of the substrate 30, and the plurality of third electrodes 21 arranged in the first direction overlap the same fourth electrode 23. That is, the whole electrode layer is provided as a plurality of electrode bars, the electrode bars cross in the first direction and the second direction to form a grid, the portion of the electrode bars located in the first display area 101 is the second sub-electrode 130, and the portion of the electrode bars located in the second display area 102 is the fourth electrode 23.
Fig. 15 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 15, a plurality of second sub-electrodes 130 are arranged in an array along a first direction and a second direction, where the first direction intersects the second direction. The display panel further includes a fourth connection line 132. Two second sub-electrodes 130 adjacent in the second direction are electrically connected by a fourth connection line 132. In the embodiment of the present invention, the plurality of second sub-electrodes 130 arranged along the second direction are electrically connected by the fourth connection line 132, so as to provide the same voltage to the plurality of second sub-electrodes 130 arranged along the second direction.
Optionally, referring to fig. 15, the display panel includes a fourth connection line 132, the fourth connection line 132 is disposed in the same layer as the second sub-electrodes 130, and the fourth connection line 132 is located between two adjacent second sub-electrodes 130 in the second direction. In the embodiment of the present invention, the fourth connection line 132 and the second sub-electrode 130 are disposed on the same layer, and the fourth connection line 132 and the second sub-electrode 130 may be formed by using the same material and in the same process, thereby saving the process.
Fig. 16 is a schematic top view of another display panel according to an embodiment of the present invention, and referring to fig. 16, the display panel further includes a third connecting line 131. Two second sub-electrodes 130 adjacent in the first direction are electrically connected by a third connection line 131. The third connecting line 131 is disposed on the same layer as the second sub-electrodes 130, and the third connecting line 131 is located between two adjacent second sub-electrodes 130 in the first direction.
In another embodiment, the display panel further includes a third connection line 131 and a fourth connection line 132. Two second sub-electrodes 130 adjacent in the first direction are electrically connected by a third connection line 131. Two second sub-electrodes 130 adjacent in the second direction are electrically connected by a fourth connection line 132. The third connecting line 131 is disposed on the same layer as the second sub-electrodes 130, and the third connecting line 131 is located between two adjacent second sub-electrodes 130 in the first direction. The fourth connection line 132 is disposed on the same layer as the second sub-electrodes 130, and the fourth connection line 132 is located between two adjacent second sub-electrodes 130 in the second direction.
Fig. 17 is a schematic top view illustrating another display panel according to an embodiment of the invention, and referring to fig. 17, the display panel includes a fourth connecting line 132. The plurality of second sub-electrodes 130 arranged in the second direction overlap the same fourth connection line 132 in a direction perpendicular to the substrate 30. In the embodiment of the present invention, the fourth connection line 132 is overlapped and electrically connected with the plurality of second sub-electrodes 130 arranged along the second direction, so as to provide the same voltage to the plurality of second sub-electrodes 130 arranged along the second direction.
Fig. 18 is a schematic top view of another display panel according to an embodiment of the disclosure, and referring to fig. 18, the display panel includes a third connecting line 131. The plurality of second sub-electrodes 130 arranged in the first direction overlap the same third connection line 131 in a direction perpendicular to the substrate 30.
In another embodiment, the display panel includes third and fourth connection lines 131 and 132. The plurality of second sub-electrodes 130 arranged in the first direction overlap the same third connection line 131 in a direction perpendicular to the substrate 30. The plurality of second sub-electrodes 130 arranged in the second direction overlap the same fourth connection line 132 in a direction perpendicular to the substrate 30.
Optionally, referring to fig. 3, the display panel further includes a light sensing element 40, and the light sensing element 40 is located in the first display area 101. The light sensing element 40 is located between the first sub-pixel 10 and the substrate 30. In a direction perpendicular to the substrate 30, the light sensing element 40 at least partially overlaps the first gap G1, and the light sensing element 40 at least partially overlaps the second gap G2. In the embodiment of the invention, the light sensing element 40 at least partially overlaps the first gap G1 and the second gap G2, thereby facilitating the light to pass through the first gap G1 and the second gap G2, and increasing the amount of light projected onto the light sensing element 40.
Illustratively, referring to fig. 12, the light sensing element 40 at least partially overlaps the third gap G3 in a direction perpendicular to the substrate 30, thereby further increasing the amount of light projected onto the light sensing element 40.
Fig. 19 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, and referring to fig. 3 and fig. 19, the display panel further includes a first pixel driving circuit 38 and a second pixel driving circuit 37 (fig. 3 illustrates a thin film transistor electrically connected to the third electrode 21 in the second pixel driving circuit 37, and actually, the second pixel driving circuit 37 may include a plurality of thin film transistors and a storage capacitor). The first pixel drive circuit 38 is located between the first sub-pixel 10 and the substrate 30. The first pixel driving circuit 38 at least partially overlaps the first sub-pixel 10 in a direction perpendicular to the substrate 30. The second pixel driving circuit 37 is located between the second sub-pixel 20 and the substrate 30. The second pixel driving circuit 37 at least partially overlaps the second sub-pixel 20 in a direction perpendicular to the substrate 30. The number of elements in the first pixel driving circuit 38 is smaller than the number of elements in the second pixel driving circuit 37. Since the light sensing element 40 is disposed between the first sub-pixel 10 and the substrate 30, the light sensing element 40 occupies a space under the first sub-pixel 10, resulting in a reduction in the space reserved for the first pixel driving circuit 38. In the embodiment of the present invention, the first pixel driving circuit 38 driving the first sub-pixel 10 has fewer components, and the second pixel driving circuit 37 driving the second sub-pixel 20 has more components, so that the first pixel driving circuit 38 occupies a smaller space.
Illustratively, the first pixel driving circuit 38 may employ a 2T1C circuit, and the second pixel driving circuit 37 may employ a 7T1C circuit. The 2T1C circuit and the 7T1C circuit can be implemented by conventional techniques in the art, and are not described in detail herein.
Fig. 20 is a schematic cross-sectional structure view along the direction DD' in fig. 19, and referring to fig. 19 and 20, the first pixel driving circuit 38 includes a thin film transistor, and a plurality of first sub-electrodes 110 are electrically connected to a source or a drain of the same thin film transistor, so that the first pixel driving circuit 38 simultaneously drives the plurality of first sub-electrodes 110 in the same first sub-pixel 10. It should be noted that the thin film transistors in the first pixel driving circuit 38 and the second pixel driving circuit 37 in fig. 20 do not represent the width of the thin film transistors in the actual display panel, and the thin film transistors in the first pixel driving circuit 38 and the second pixel driving circuit 37 in fig. 20 are mainly used for illustrating the positions of the film layers of the first pixel driving circuit 38 and the second pixel driving circuit 37 and illustrating the electrical connection relationship between the first pixel driving circuit 38 and the second pixel driving circuit 37.
Fig. 21 is a schematic top view structure diagram of another display panel according to an embodiment of the invention, and referring to fig. 21, the first sub-electrode 110 includes a reflective area 1101 and a hollow area 1102, and a transmittance of the hollow area 1102 is greater than a transmittance of the reflective area 1101. In the embodiment of the invention, on the basis of the above embodiment, the first sub-electrode 110 includes the hollow area 1102, and the light can be projected onto the light sensing element 40 through the hollow area 1102 on the first sub-electrode 110, so that the amount of the light projected onto the light sensing element 40 is increased.
For example, referring to fig. 21, the reflective region 1101 is a region on the first sub-electrode 110 including a reflective material, and the hollow region 1102 is a region on the first sub-electrode 110 where the reflective material is removed. Further, a transparent conductive material may be disposed in the hollow area 1102, and the transparent conductive material fills the hole formed in the hollow area 1102 and removed by the reflective material.
Fig. 22 is a schematic cross-sectional structural view of another display panel according to an embodiment of the present invention, and referring to fig. 22, the first light-emitting functional layer 12 includes at least one of a light-emitting material layer 124, a hole injection layer 121, a hole transport layer 122, an electron blocking layer 123, an electron injection layer 127, an electron transport layer 126, and a hole blocking layer 125. In the embodiment of the present invention, at least one of the light emitting material layer 124, the hole injection layer 121, the hole transport layer 122, the electron blocking layer 123, the electron injection layer 127, the electron transport layer 126, and the hole blocking layer 125 is divided into a plurality of small blocks arranged at intervals, thereby forming the first gap G1.
Exemplarily, referring to fig. 22, the first light emission function layer 12 includes a light emission material layer 124, a hole injection layer 121, a hole transport layer 122, an electron blocking layer 123, an electron injection layer 127, an electron transport layer 126, and a hole blocking layer 125. The light emitting material layer 124 includes a plurality of sub light emitting material layers, and a first sub interval exists between adjacent sub light emitting material layers. Similarly, the hole injection layer 121 includes a plurality of sub-hole injection layers, and a second sub-interval exists between adjacent sub-hole injection layers. The hole transport layer 122 includes a plurality of sub-hole transport layers, and a third sub-space exists between adjacent sub-hole transport layers. The electron blocking layer 123 includes a plurality of sub-electron blocking layers, and a fourth sub-space exists between adjacent sub-electron blocking layers. The hole blocking layer 125 includes a plurality of sub-hole blocking layers, and a fifth sub-interval exists between adjacent sub-hole blocking layers. The electron transport layer 126 includes a plurality of sub electron transport layers, and a sixth sub interval exists between adjacent sub electron transport layers. The electron injection layer 127 includes a plurality of sub electron injection layers with a seventh sub interval between adjacent sub electron injection layers. Any two of the first sub-interval, the second sub-interval, the third sub-interval, the fourth sub-interval, the fifth sub-interval, the sixth sub-interval, and the seventh sub-interval overlap in a direction perpendicular to the substrate 30. The first sub-interval, the second sub-interval, the third sub-interval, the fourth sub-interval, the fifth sub-interval, the sixth sub-interval, and the seventh sub-interval constitute a first interval G1.
Fig. 23 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 23, the display device includes the display panel in the above embodiment. The display device can be a mobile phone, a tablet computer, a vehicle-mounted display device, an intelligent wearable device and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (18)
1. A display panel comprising a display area, the display area comprising a first display area and a second display area;
the pixel structure comprises a substrate and a plurality of pixel units positioned on one side of the substrate; the pixel unit positioned in the first display area comprises a plurality of first sub-pixels, and the pixel unit positioned in the second display area comprises a plurality of second sub-pixels;
the first sub-pixel comprises a first electrode and a first light-emitting function layer, and the first electrode is positioned between the first light-emitting function layer and the substrate; the first electrode comprises a plurality of first sub-electrodes, and a first interval is formed between every two adjacent first sub-electrodes; the first light-emitting functional layer comprises a plurality of first secondary light-emitting functional layers with the same light-emitting color, and a second interval is formed between every two adjacent first secondary light-emitting functional layers; the first spacing at least partially overlaps the second spacing in a direction perpendicular to the substrate.
2. The display panel according to claim 1, wherein a plurality of the first sub-electrodes are arrayed in a first direction and a second direction, the first direction crossing the second direction;
the first sub-electrodes are electrically connected through the first connecting lines, and the second sub-electrodes are electrically connected through the second connecting lines.
3. The display panel according to claim 2, wherein when the display panel includes the first connection line, the first connection line and the first sub-electrode are disposed in the same layer and located between two adjacent first sub-electrodes in the first direction;
when the display panel comprises the second connecting line, the second connecting line and the first sub-electrodes are arranged on the same layer and are positioned between two adjacent first sub-electrodes in the second direction.
4. The display panel according to claim 2, wherein the display panel includes the first connection line, a direction perpendicular to the substrate, and a plurality of the first sub-electrodes arranged in the first direction overlap the same first connection line;
when the display panel comprises the second connecting line, the direction perpendicular to the substrate is vertical, and the plurality of first sub-electrodes arranged along the second direction are overlapped with the same second connecting line.
5. The display panel according to claim 1, further comprising a pixel defining layer, wherein the pixel defining layer is provided with a plurality of first openings in each of the first display region and the second display region;
the plurality of first sub-light emitting function layers in the same first sub-pixel are located in the same first opening, and the second sub-pixel is located in the first opening corresponding to the second sub-pixel.
6. The display panel according to claim 1, further comprising a pixel defining layer, wherein the pixel defining layer has a plurality of second openings in the first display region and a plurality of first openings in the second display region;
the first secondary light-emitting functional layers are positioned in the second openings which are in one-to-one correspondence with the first secondary light-emitting functional layers, and the second sub-pixels are positioned in the first openings which are in one-to-one correspondence with the second sub-pixels.
7. The display panel according to claim 1, wherein the first subpixel further comprises a second electrode on a side of the first luminescent functional layer away from the substrate;
the second electrode comprises a plurality of second sub-electrodes, and a third interval is formed between every two adjacent second sub-electrodes;
the third space at least partially overlaps the first space and at least partially overlaps the second space in a direction perpendicular to the substrate.
8. The display panel according to claim 7, wherein a plurality of the second sub-electrodes extend along a second direction and are arranged along a first direction, and/or wherein a plurality of the second sub-electrodes extend along a first direction and are arranged along the second direction; wherein the first direction intersects the second direction;
the second sub-pixel comprises a third electrode, a second light-emitting functional layer and a fourth electrode, wherein the third electrode is positioned between the substrate and the second light-emitting functional layer, and the second light-emitting functional layer is positioned between the third electrode and the fourth electrode; at least one of the second sub-electrodes is integrally formed with at least one of the fourth electrodes.
9. The display panel according to claim 8, wherein all the third electrodes overlap the same fourth electrode in a direction perpendicular to the substrate.
10. The display panel according to claim 8, wherein a plurality of the third electrodes arranged in the second direction overlap with the same fourth electrode in a direction perpendicular to the substrate when a plurality of the second sub-electrodes extend in the second direction and are arranged in the first direction; when the plurality of second sub-electrodes extend along a first direction and are arranged along the second direction, the direction perpendicular to the substrate is provided, and the plurality of third electrodes arranged along the first direction are overlapped with the same fourth electrode.
11. The display panel according to claim 7, wherein a plurality of the second sub-electrodes are arranged in an array along a first direction and a second direction, the first direction crossing the second direction;
the first sub-electrodes are electrically connected with the second sub-electrodes along the first direction through the first connecting line, and the second sub-electrodes are electrically connected with the second sub-electrodes along the second direction through the fourth connecting line.
12. The display panel according to claim 11, wherein when the display panel includes the third connecting line, the third connecting line is disposed in the same layer as the second sub-electrodes and located between two adjacent second sub-electrodes in the first direction;
when the display panel comprises the fourth connecting line, the fourth connecting line and the second sub-electrodes are arranged on the same layer and are positioned between two adjacent second sub-electrodes in the second direction.
13. The display panel according to claim 11, wherein when the display panel includes the third connection line, the second sub-electrodes arranged in the first direction overlap with the same third connection line in a direction perpendicular to the substrate;
when the display panel comprises the fourth connecting line, the direction perpendicular to the substrate is vertical, and the plurality of second sub-electrodes arranged along the second direction are overlapped with the same fourth connecting line.
14. The display panel of claim 1, further comprising a light sensing element located in the first display region between the first sub-pixel and the substrate in a direction perpendicular to the substrate, the light sensing element at least partially overlapping the first space and the light sensing element at least partially overlapping the second space.
15. The display panel according to claim 14, further comprising a first pixel driving circuit and a second pixel driving circuit;
the first pixel driving circuit is located between the first sub-pixel and the substrate, the second pixel driving circuit is located between the second sub-pixel and the substrate, and the number of elements in the first pixel driving circuit is smaller than the number of elements in the second pixel driving circuit.
16. The display panel according to claim 1, wherein the first sub-electrode comprises a reflective region and a hollow-out region, and a transmittance of the hollow-out region is greater than a transmittance of the reflective region.
17. The display panel according to claim 1, wherein the first light-emitting functional layer comprises at least one of a light-emitting material layer, a hole injection layer, a hole transport layer, an electron blocking layer, an electron injection layer, an electron transport layer, and a hole blocking layer.
18. A display device characterized by comprising the display panel according to any one of claims 1 to 17.
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