CN111261692B - Display panel and display device - Google Patents
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- CN111261692B CN111261692B CN202010161889.7A CN202010161889A CN111261692B CN 111261692 B CN111261692 B CN 111261692B CN 202010161889 A CN202010161889 A CN 202010161889A CN 111261692 B CN111261692 B CN 111261692B
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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Abstract
The invention discloses a display panel and a display device. The display panel is provided with a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the display panel comprises a first functional layer, a light emitting layer, a second functional layer and a cathode layer which are sequentially stacked along the light emitting direction of the display panel; the cathode layer comprises a first cathode layer positioned in the first display area and a second cathode layer positioned in the second display area, and at least part of the thickness of the first cathode layer is not consistent with that of the second cathode layer. The display panel disclosed by the invention can reduce the display difference of the first display area and the second display area under different viewing angles, and improve the display uniformity of the display panel.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel and a display device.
Background
With the development of display technology, the overall screen is more and more favored, in order to improve the light transmittance of the auxiliary screen, the structure of the auxiliary screen pixels is usually inconsistent with that of the main screen, and the display of the main screen and the auxiliary screen at different viewing angles has obvious difference.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, and aims to improve the display uniformity of the display panel under different viewing angles.
In a first aspect, the present invention provides a display panel having a first display region and a second display region, the first display region having a light transmittance greater than that of the second display region,
the display panel comprises a first functional layer, a light emitting layer, a second functional layer and a cathode layer which are sequentially stacked along the light emitting direction of the display panel; the cathode layer comprises a first cathode layer positioned in the first display area and a second cathode layer positioned in the second display area, and at least part of the thickness of the first cathode layer is not consistent with that of the second cathode layer.
According to an aspect of the present invention, the light emitting layer includes a first light emitting layer located in the first display region; the first light-emitting layer comprises a first red light-emitting unit, a first green light-emitting unit and a first blue light-emitting unit, the thickness d1 of the first cathode layer corresponding to the first red light-emitting unit, the thickness d2 of the first cathode layer corresponding to the first green light-emitting unit and the thickness d3 of the first cathode layer corresponding to the first blue light-emitting unit satisfy: d1 > d2 > d 3.
According to an aspect of the present invention, the second cathode layer has a uniform thickness, and the thickness d2 of the first cathode layer corresponding to the first green light emitting cell is equal to the thickness d4 of the second cathode layer; or the thickness d1 of the first cathode layer corresponding to the first red light emitting unit is consistent with the thickness d4 of the second cathode layer.
According to an aspect of the present invention, the second functional layer includes a first sub second functional layer located in the first display region and a second sub second functional layer located in the second display region, and a thickness of the first sub second functional layer is greater than a thickness of the second sub second functional layer.
According to an aspect of the present invention, the first cathode layer and the second cathode layer are each a layered structure having a uniform thickness, and the thickness of the first cathode layer is smaller than that of the second cathode layer.
According to an aspect of the present invention, the light emitting layer includes a first light emitting layer located in the first display region and a second light emitting layer located in the second display region, and a thickness of the first light emitting layer is identical to a thickness of the second light emitting layer.
According to an aspect of the present invention, the first functional layer includes a first sub first functional layer located in the first display region and a second sub first functional layer located in the second display region, and a sum of thicknesses of the first display region from the first cathode layer to the first sub first functional layer is equal to a sum of thicknesses of the second display region from the second cathode layer to the second sub first functional layer.
According to one aspect of the invention, the display device further comprises a light extraction layer, the light extraction layer is positioned on one side of the cathode layer, which is far away from the light emitting layer, the light extraction layer comprises a first light extraction layer positioned in a first display area, and in the first display area, from the first light extraction layer to the first functional layer, the refractive indexes of the layers are alternately arranged.
According to an aspect of the present invention, in the first display region, the refractive index of the light extraction layer is largest from the light extraction layer to the first functional layer.
In a second aspect, the present invention provides a display device including the display panel of any one of the above embodiments.
In the embodiment of the invention, the display panel comprises a first functional layer, a light emitting layer, a second functional layer and a cathode layer which are sequentially stacked along the light emitting direction of the display panel, the cathode layer comprises a first cathode layer positioned in a first display area and a second cathode layer positioned in a second display area, and at least part of the thickness of the first cathode layer is different from that of the second cathode layer. In this embodiment, the thickness of the first cathode layer in the first display area is adjusted to be different from the thickness of the second cathode layer in the second display area, so that the viewing angle attenuation of the first display area at different viewing angles is adjusted, the difference between the viewing angle attenuation of the first display area and the viewing angle attenuation of the second display area is reduced, the dispersion of viewing angle color shift is improved, the display difference of the first display area and the second display area at different viewing angles is reduced, and the display uniformity of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below 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 diagram illustrating a top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view B-B of FIG. 1;
FIG. 3 is another cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic top view of a display device according to an embodiment of the present invention;
fig. 5 is a cross-sectional view D-D of fig. 4.
Wherein: 100-a display panel; 110-an anode layer; 111-a first anode layer; 112-a second anode layer; 120-a first functional layer; 121 — a first sub-first functional layer; 121 a-a first electron blocking layer; 121 b-a first hole transport layer; 121 c-first hole injection layer; 122-a second sub-second functional layer; 130-a light emitting layer; 131-a first light-emitting layer; 131R — first red light emitting unit; 131G — a first green light emitting unit; 131B-a first blue light emitting cell; 132-a second light emitting layer; 132R-a second red light emitting unit; 131G — a second green light emitting unit; 131B-a second blue light emitting unit; 140-a cathode layer; 141-a first cathode layer; 142-a second cathode layer; 150-a light extraction layer; 151-first light extraction layer; 160-a second functional layer; 161-first sub-second functional layer; 161 a-first electron injection layer; 161 b-a first electron transport layer; 162-a second sub-second functional layer;
1000-a display device; 200-photosensitive component.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In electronic devices such as mobile phones and tablet computers, photosensitive components such as a front camera, an infrared light sensor, and a proximity light sensor need to be integrated on a side where a display panel is provided. In some embodiments, a transparent display area may be disposed on the electronic device, and the photosensitive component is disposed on the back of the transparent display area, so as to achieve full-screen display of the electronic device under the condition that the photosensitive component is ensured to work normally.
In order to improve the light transmittance of the light-transmitting display region, the display effect of the light-transmitting display region is usually sacrificed, so that the display effects of the light-transmitting display region and other display regions of the electronic device are inconsistent.
In order to solve the above problems, embodiments of the present invention provide a display panel and a display device, and the following describes embodiments of the display panel and the display device with reference to the accompanying drawings.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the invention, and fig. 2 is a cross-sectional view taken along line B-B of fig. 1.
The display panel 100 has a first display area AA1 and a second display area AA2, the second display area AA2 may be at least partially disposed around the first display area AA1, the first display area AA1 may include a plurality of first sub-pixels arranged in an array, and the second display area AA2 may include a plurality of second sub-pixels arranged in an array. The light transmittance of the first display region AA1 is greater than that of the second display region AA 2.
Herein, it is preferable that the light transmittance of the first display area AA1 is 15% or more. In order to ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even higher, it is preferable that the light transmittance of each functional film layer of the display panel 100 in this embodiment is greater than 80%, and even at least some of the functional film layers have a light transmittance greater than 90%.
According to the display panel 100 of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component on the back of the first display area AA1, and realize the under-screen integration of the photosensitive component such as a camera, and meanwhile, the first display area AA1 can display a picture, so that the display area of the display panel 100 is increased, and the full-screen design of the display device is realized. The display panel 100 may include an array substrate, and a first functional layer 120, a light emitting layer 130, a second functional layer 160, and a cathode layer 140 disposed on an array substrate anode layer 110.
The cathode layer 140 includes a first cathode layer 141 at the first display area AA1 and a second cathode layer 142 at the second display area AA 2. Wherein at least a portion of the thickness of the first cathode layer 141 is not uniform with the thickness of the second cathode layer 142.
According to the display panel 100 of the embodiment of the invention, the display panel 100 includes the first functional layer 120, the light emitting layer 130, the second functional layer 160, and the cathode layer 140 sequentially stacked along the light emitting direction of the display panel 100, the cathode layer 140 includes the first cathode layer 141 located in the first display area AA1 and the second cathode layer 142 located in the second display area AA2, and at least a part of the thickness of the first cathode layer 141 is different from the thickness of the second cathode layer 142. In this embodiment, by adjusting the thickness of the first cathode layer 141 in the first display area AA1 to be different from the thickness of the second cathode layer 142 in the second display area AA2, the viewing angle attenuation of the first display area AA1 at different viewing angles is adjusted, the difference of the viewing angle attenuation of the first display area AA 3526 from the second display area AA2 is reduced, the spread of the viewing angle color shift is improved, the display difference of the first display area at different viewing angles from the second display area is reduced, and the display uniformity of the display panel 100 is improved.
It should be noted that the first functional layer 120 and the second functional layer 160 refer to functional layers related to carriers, including but not limited to a layer structure that performs functions of carrier injection, carrier transport, or carrier blocking, and the like, and the carriers include holes and electrons.
In some embodiments, the first functional layer 120 may include a first sub-first functional layer 121 positioned in the first display area AA1 and a second sub-first functional layer 122 positioned in the second display area AA 2. In some embodiments, the second functional layer 160 may include a first sub-second functional layer 161 positioned in the first display area AA1 and a second sub-second functional layer 162 positioned in the second display area AA 2.
In some embodiments, referring to FIG. 3, FIG. 3 is another cross-sectional view B-B of FIG. 1. The light emitting layer 130 includes a first light emitting layer 131 located in the first display area AA1, the first light emitting layer 131 includes a first red light emitting unit 131R, a first green light emitting unit 131G, and a first blue light emitting unit 131B, a thickness d1 of the first cathode layer 141 corresponding to the first red light emitting unit 131R, a thickness d2 of the first cathode layer 141 corresponding to the first green light emitting unit 131R, and a thickness d3 of the first cathode layer 141 corresponding to the first blue light emitting unit 131B satisfy: d1 > d2 > d 3.
In the present embodiment, the thicknesses of the first cathode layers 141 corresponding to the first red light emitting units 131R, the first green light emitting units 131G, and the first blue light emitting units 131B in the first display area AA1 are set to be different, and the thicknesses of the different areas of the first cathode layers 141 corresponding to the first light emitting units with different colors are adjusted to reduce the difference of the color shifts of the first display area AA1 and the second display area AA2 in different viewing angles, so as to improve the display uniformity of the display panel 100. Further, the problem of color shift of the viewing angle of the first display area AA1 itself can be improved.
In some embodiments, the second light emitting layer 132 includes a second red light emitting unit 132R, a second green light emitting unit 132G, and a second blue light emitting unit 132B.
Further, in some embodiments, the second cathode layer 142 is a layered structure with a uniform thickness, and the thickness of the first cathode layer 141 corresponding to the first green light emitting unit 131G is equal to the thickness of the second cathode layer 142.
In other embodiments, the thickness of the first cathode layer 141 corresponding to the first red light emitting unit 131R may be equal to the thickness of the second cathode layer 142.
Since the viewing angle attenuation difference between the first red light emitting cell 131R of the first display area AA1 and the first red light emitting cell 132R of the second display area AA2 is small, and the viewing angle attenuation difference between the first green light emitting cell 131G and the second green light emitting cell 132G of the second display area AA2 is small, the thickness of the first cathode layer 141 corresponding to the first red light emitting cell 131R and the thickness of the second cathode layer 142 may be set to be uniform, or the thickness of the first cathode layer 141 corresponding to the first green light emitting cell 131G and the thickness of the second cathode layer 142 may be set to be uniform. The viewing angle attenuation of the first blue light emitting cell 131B in the first display area AA1 is smaller than that of the second blue light emitting cell 132B in the second display area AA2, and therefore, the viewing angle attenuation of the first blue light emitting cell 131B can be relatively increased to be consistent with that of the second blue light emitting cell 132B by making the thickness of the first cathode layer 141 corresponding to the first blue light emitting cell 131B larger than that of the second cathode layer 142. In this embodiment, the thicknesses of the first cathode layers 141 corresponding to the light emitting units of different colors in the first display area AA1 are appropriately adjusted relative to the thickness of the second cathode layer 142 in the second display area AA2, so that the viewing angle attenuations of the light emitting units in the first display area AA1 and the second display area AA2 are consistent, the color shifts of the first display area AA1 and the second display area AA2 at different viewing angles are further reduced, and the display uniformity of the display panel 100 is improved.
In the above embodiment, the thickness of the first sub second functional layer 161 may be the same as the thickness of the second sub second functional layer 162; and/or the thickness of the first light emitting layer 131 may be identical to that of the second light emitting layer 132.
In this embodiment, if the thicknesses of the first sub second functional layers 161 corresponding to different light emitting units are not the same, the fact that the thickness of the first sub second functional layer 161 is the same as the thickness of the second sub second functional layer 162 means that the thickness of the second sub second functional layer 162 corresponding to the light emitting units of the same color as the first display area AA1 and the second display area AA2 is the same as the thickness of the first sub second functional layer 161. Similarly, the fact that the thickness of the first light-emitting layer 131 may be the same as the thickness of the second light-emitting layer 132 means that the thicknesses of the light-emitting cells of the same color corresponding to the first display area AA1 and the second display area AA2 are the same.
In some embodiments, as shown in fig. 2, the second functional layer 160 further includes a first sub second functional layer 161 located in the first display area AA1 and a second sub second functional layer 162 located in the second display area AA2, and the thickness of the first sub second functional layer 161 is greater than that of the second sub second functional layer 162. In some embodiments, the thickness of the first sub second functional layer 161 may be 20nm to 50nm, and the thickness of the second sub second functional layer 162 may be 10nm to 40 nm.
In this embodiment, the thickness of the first sub-second functional layer 161 in the first display area AA1 is greater than the thickness of the second sub-second functional layer 162 in the second display area AA2, so that the visual angle attenuation of the first red light-emitting unit 131R in the first display area AA1 can be increased, and the visual angle attenuation of the first blue light-emitting unit 131B can be reduced, so that the visual angle attenuations of the light-emitting units of the corresponding colors in the first display area AA1 and the second display area AA2 can be made to be consistent, the color shift difference between the first display area AA1 and the second display area AA2 at different visual angles can be further reduced, and the display uniformity of the display panel 100 can be improved.
If the thicknesses of the first sub second functional layers 161 corresponding to the light emitting units of different colors are not the same, the thickness of the first sub second functional layer 161 is greater than that of the second sub second functional layer 162, which means that the thickness of the first sub second functional layer 161 corresponding to the light emitting units of the same color as the second display area AA2 in the first display area AA1 is greater than that of the second sub second functional layer 162.
Further, in some embodiments, the first cathode layer 141 and the second cathode layer 142 are both of a layered structure having a uniform thickness, and the thickness of the first cathode layer 141 is smaller than that of the second cathode layer 142.
In this embodiment, the thickness of the first cathode layer 141 in the first display area AA1 is smaller than that of the second cathode layer 142 in the second display area AA2, so that the transmittance of the first display area AA1 can be improved, and the thickness of the first cathode layer 141 in the first display area AA1 is consistent with that of the first sub-second functional layer 161 and that of the second cathode layer 142 in the second display area AA2 is consistent with that of the second sub-second functional layer 162 by reducing the thickness of the first cathode layer 141, so that the heights of the first display area AA1 and the second display area AA2 are consistent.
In some embodiments, the thickness of the first light emitting layer 131 is the same as the thickness of the second light emitting layer 132. Specifically, the first light-emitting layer 131 includes a red first light-emitting unit 131R, a green first light-emitting unit 131G, and a blue first light-emitting unit 131B, and the second light-emitting layer 132 includes a red second light-emitting unit 132R, a green second light-emitting unit 132G, and a blue second light-emitting unit 132B, so that the thickness of the first light-emitting layer 131 is the same as the thickness of the second light-emitting layer 132 in this embodiment, which means that the thicknesses of the light-emitting units of the same color in the first display area AA1 and the second display area AA2 are the same. When the light emitting layers of the first display area AA1 and the second display area AA2 are formed by evaporation, the evaporation of the light emitting units of the same color in the first display area AA1 and the second display area AA2 can be performed simultaneously, so that the preparation process can be simplified, and the preparation efficiency can be improved.
In some embodiments, the thickness of the first display area AA1 from the first cathode layer 141 to the first sub-first functional layer 121 is equal to the sum of the thicknesses of the second display area AA2 from the second cathode layer 142 to the second sub-first functional layer 122. Which facilitates the uniformity of the overall thickness of the display panel 100.
In any of the above embodiments, the display panel 100 may further include a light extraction layer 150, the light extraction layer 150 is located on a side of the cathode layer 140 facing away from the light emitting layer 130, and the light extraction layer 150 includes a first light extraction layer 151 located in the first display area AA 1. The light extraction layer 150 can adjust the optical interference distance, suppress external light reflection, and improve the light extraction efficiency.
In the first display area AA1, the refractive indices of the layers satisfy the alternating arrangement of high and low from the first light extraction 151 to the first functional layer 120.
According to the display panel of the embodiment of the invention, in the first display area AA1, the refractive indexes of the respective layers satisfy the high-low alternating arrangement from the first light extraction layer 151 to the first functional layer 120. Through the alternative arrangement of the refractive indexes of the different film layers, a resonant cavity can be formed between the anode layer 110 and the light extraction layer 150 of the first display area AA1 of the display panel, so that a microcavity effect between the anode layer 110 and the cathode layer 140 of the first display area AA1 can be enhanced, the light extraction efficiency of the first display area AA1 is improved, the display difference between the first display area AA1 and the second display area AA2 is reduced, and the display uniformity of the display panel 100 is improved.
In some embodiments, the refractive indices of the first sub-first functional layer 121 and the first sub-second functional layer 161 may be both 1.3 to 1.5; the refractive index of the first light emitting layer 131 may be 1.4 to 1.6; the refractive index of the first cathode layer can be 0.5-1; the refractive index of the first light extraction layer 151 is 1.6 to 2.1.
In some embodiments, the anode layer 110 of the display panel 100 includes a first anode layer 111 positioned in the first display area AA1 and a second anode layer 112 positioned in the second display area AA 2. In some embodiments, the first anode layer 111 is a reflective electrode layer and may include a first light-transmissive conductive layer, a reflective layer on the first light-transmissive conductive layer, and a second light-transmissive conductive layer on the reflective layer. The first and second transparent conductive layers may be ITO, indium zinc oxide, etc., and the reflective layer may be a metal layer, such as made of silver.
Further, in some embodiments, the orthographic area of the first anode layer 111 on the cathode layer 140 is smaller than the orthographic area of the second anode layer 112 on the cathode layer 140. The first anode layer 111 adopts a small anode scheme, which can increase the transmittance of the first display area AA1, thereby improving the photosensitive effect of the photosensitive assembly 200.
In some embodiments, the second functional layer 160 may include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer disposed between the light emitting layer 130 and the cathode layer 140, and the first functional layer 120 may include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer disposed between the light emitting layer 140 and the anode layer 110. Wherein, the electron injection layer may include a first electron injection layer 121a positioned at the first display area AA1 and a second electron injection layer positioned at the second display area AA 2; the electron transport layer may include a first electron transport layer 161b positioned at the first display area AA1 and a second electron transport layer positioned at the second display area AA 2; the hole blocking layer may include a first hole blocking layer located at the first display region AA1 and a second hole blocking layer located at the second display region AA 2; the hole injection layer may include a first hole injection layer 121c positioned at the first display area AA1 and a second hole injection layer positioned at the second display area AA 2; the hole transport layer may include a first hole transport layer 121b positioned at the first display region AA1 and a second hole transport layer positioned at the second display region AA 2; the electron blocking layer may include a first electron blocking layer 121a positioned at the first display area AA1 and a second electron blocking layer positioned at the second display area AA 2. For example, as shown in fig. 2, in an embodiment, the first sub-first functional layer 121 may specifically include a first hole injection layer 121c, a first hole transport layer 121b and a first electron blocking layer 121a, and the second sub-first functional layer 161 may specifically include a first electron injection layer 161a and a first electron transport layer 161 b. In order to further improve the light extraction efficiency of the first display area AA1, in the first display area AA1, the refractive indexes of the light extraction layer 150, the first cathode layer 141, the first electron injection layer 161a, the first electron transport layer 161b, the first light emitting layer 131, the first electron blocking layer 121a, the first hole transport layer 121b, and the first hole injection layer 121c satisfy a high-low alternating arrangement.
Further, in some embodiments, the refractive index of the first light extraction layer 151 is the largest in the first display area AA1, the first light extraction layer 151 to the first functional layer 121. The refractive index of the first light extraction layer 151 is greater than that of the other film layers, so that a Surface Plasmon Polariton (SPP) effect can be effectively avoided.
The display panel 100 of the above embodiments may be a flexible display panel or a rigid display panel, and the invention is not limited thereto. The exemplary display panel 100 may further include an encapsulation layer located above the light extraction layer 150, and a polarizer and a cover plate located above the encapsulation layer, or the cover plate may be directly disposed above the encapsulation layer without disposing a polarizer, or at least the cover plate may be directly disposed above the encapsulation layer of the first display area AA1 without disposing a polarizer, so as to avoid the polarizer from affecting the light collection amount of the photosensitive element disposed below the first display area AA1, and of course, the polarizer may also be disposed above the encapsulation layer of the first display area AA 1.
The present embodiment further provides a display device 1000, and the display device 1000 may include the display panel 100 of any of the above embodiments.
Fig. 4 is a schematic top view of a display device according to an embodiment of the invention, and fig. 5 is a cross-sectional view of fig. 4 taken along line D-D. In the display device 1000 of the present embodiment, the display panel 100 may be the display panel 100 of one of the above embodiments, the display panel 100 has a first display area AA1 and a second display area AA2, and the light transmittance of the first display area AA1 is greater than that of the second display area AA 2.
The display panel 100 includes a first surface S1 and a second surface S2 opposite to each other, wherein the first surface S1 is a display surface. The display device further includes a photosensitive element 200, wherein the photosensitive element 200 is located on the second surface S2 side of the display panel 100, and the photosensitive element 200 corresponds to the first display area AA 1.
The photosensitive assembly 200 may be an image capturing device for capturing external image information. In this embodiment, the photosensitive assembly 200 is a Complementary Metal Oxide Semiconductor (CMOS) image capture Device, and in other embodiments, the photosensitive assembly 200 may also be a Charge-coupled Device (CCD) image capture Device or other types of image capture devices. It is understood that the photosensitive assembly 200 may not be limited to an image capture device, for example, in some embodiments, the photosensitive assembly 200 may also be an infrared sensor, a proximity sensor, an infrared lens, a flood sensing element, an ambient light sensor, a dot matrix projector, and the like. In addition, the display device 1000 may further integrate other components, such as a handset, a speaker, etc., on the second surface S2 of the display panel 100.
In the display device 1000 according to the embodiment of the invention, the display panel 100 includes the first functional layer 120, the light emitting layer 130, the second functional layer 160, and the cathode layer 140 sequentially stacked along the light emitting direction of the display panel 100, the cathode layer includes the first cathode layer 141 located in the first display area AA1 and the second cathode layer 142 located in the second display area AA2, and at least a part of the thickness of the first cathode layer 141 is different from the thickness of the second cathode layer 142. In this embodiment, by adjusting the thickness of the first cathode layer 141 in the first display area AA1 to be different from the thickness of the second cathode layer 142 in the second display area AA2, the viewing angle attenuation of the first display area AA1 at different viewing angles is adjusted, the difference of the viewing angle attenuation of the first display area AA 3526 from the second display area AA2 is reduced, and the spread of the viewing angle color shift is improved, so that the display difference of the first display area and the second display area at different viewing angles is reduced, and the display uniformity of the display device 1000 as a whole is improved.
Since the display device 1000 according to the embodiment of the present invention includes the display panel 100 according to any one of the embodiments, the display device has the beneficial effects of the display panel 100 according to the embodiments, and the description thereof is omitted here.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A display panel is characterized by comprising a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area, and the display panel comprises a first functional layer, a light emitting layer, a second functional layer and a cathode layer which are sequentially stacked along the light emitting direction of the display panel;
the cathode layer comprises a first cathode layer positioned in the first display area and a second cathode layer positioned in the second display area, and at least part of the thickness of the first cathode layer is not consistent with that of the second cathode layer;
and the light extraction layer is positioned on one side of the cathode layer, which is deviated from the light emitting layer, and comprises a first light extraction layer positioned in a first display area, and in the first display area, the refractive indexes of all layers from the first light extraction layer to the first functional layer meet the requirement of high-low alternative arrangement.
2. The display panel according to claim 1, wherein the light-emitting layer comprises a first light-emitting layer in the first display region;
the first light-emitting layer comprises a first red light-emitting unit, a first green light-emitting unit and a first blue light-emitting unit, and the thickness d1 of the first cathode layer corresponding to the first red light-emitting unit, the thickness d2 of the first cathode layer corresponding to the first green light-emitting unit and the thickness d3 of the first cathode layer corresponding to the first blue light-emitting unit satisfy the following conditions: d1 > d2 > d 3.
3. The display panel of claim 2, wherein the second cathode layer is a layered structure with a uniform thickness, and the thickness d2 of the first cathode layer corresponding to the first green light emitting unit is equal to the thickness d4 of the second cathode layer; or
The thickness d1 of the first cathode layer corresponding to the first red light emitting unit is consistent with the thickness d4 of the second cathode layer.
4. The display panel according to claim 1, wherein the second functional layer comprises a first sub second functional layer located in the first display region and a second sub second functional layer located in the second display region, and a thickness of the first sub second functional layer is greater than a thickness of the second sub second functional layer.
5. The display panel according to claim 4, wherein the first cathode layer and the second cathode layer are each a layered structure having a uniform thickness, and wherein the thickness of the first cathode layer is smaller than that of the second cathode layer.
6. The display panel according to claim 5, wherein the light-emitting layer comprises a first light-emitting layer in the first display region and a second light-emitting layer in the second display region, and wherein a thickness of the first light-emitting layer is equal to a thickness of the second light-emitting layer.
7. The display panel according to claim 6, wherein the first functional layer comprises a first sub first functional layer in a first display region and a second sub first functional layer in a second display region, and a sum of thicknesses of the first display region from the first cathode layer to the first sub first functional layer is equal to a sum of thicknesses of the second display region from the second cathode layer to the second sub first functional layer.
8. The display panel according to claim 1, wherein the refractive index of the light extraction layer is largest in the first display region from the light extraction layer to the first functional layer.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN112382238B (en) * | 2020-12-03 | 2022-04-15 | 云谷（固安）科技有限公司 | Array substrate and display device |
| CN113066939B (en) * | 2021-03-23 | 2022-08-02 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN113540189B (en) * | 2021-06-29 | 2023-12-22 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN114520300B (en) * | 2022-01-05 | 2023-06-27 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN114447251A (en) * | 2022-01-28 | 2022-05-06 | 厦门天马显示科技有限公司 | Display panel and display device |
| CN114495804B (en) * | 2022-04-08 | 2022-11-04 | 北京京东方技术开发有限公司 | Display panel and display device |
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| CN107275502A (en) * | 2017-06-29 | 2017-10-20 | 上海天马有机发光显示技术有限公司 | Organic electroluminescence display panel and display device |
| CN110867524A (en) * | 2019-11-20 | 2020-03-06 | 昆山国显光电有限公司 | Display panel, manufacturing method thereof and display device |
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| CN107275502A (en) * | 2017-06-29 | 2017-10-20 | 上海天马有机发光显示技术有限公司 | Organic electroluminescence display panel and display device |
| CN110867524A (en) * | 2019-11-20 | 2020-03-06 | 昆山国显光电有限公司 | Display panel, manufacturing method thereof and display device |
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