CN111883565B - Display panel and display device - Google Patents
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- CN111883565B CN111883565B CN202010624276.2A CN202010624276A CN111883565B CN 111883565 B CN111883565 B CN 111883565B CN 202010624276 A CN202010624276 A CN 202010624276A CN 111883565 B CN111883565 B CN 111883565B
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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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
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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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
- H10K59/65—OLEDs integrated with inorganic image sensors
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Abstract
The invention provides a display panel and a display device, comprising a first display area and a second display area, wherein the first display area comprises a first anode, a pixel definition layer and a light-emitting functional layer; wherein: the first anode comprises a first transparent conducting layer, a first metal reflecting layer and a second transparent conducting layer which are sequentially stacked, wherein the first metal reflecting layer is arranged on the first transparent conducting layer and corresponds to the light-emitting unit; the first metal reflecting layer is provided with a groove; the display device comprises the display panel. According to the invention, the groove is formed in the metal reflecting layer, the first metal reflecting layer in each pixel area is partially totally reflected, and partially can be semi-permeable and semi-reflective, so that when light emitted by the light-emitting functional layer is reflected back and forth between the first reflecting layer and the cathode, a microcavity effect is formed, the transmittance is improved, and the efficiency loss at the position under the screen is not too high, so that the service life is improved, and the imaging quality of the camera under the screen is facilitated.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel and a display device.
Background
With the increasing popularity of mobile portable devices, the high screen ratio screen is a future development trend of electronic devices such as mobile phones and tablets due to better visual experience for users. Mobile electronic terminals, especially mobile phones, seek dual advantages of portability and large-screen display, so that the mobile phones need higher and higher screen occupation ratio, but electronic components in the mobile phones, such as a receiver and a front camera, occupy space of a display area, and are not beneficial to improving the screen occupation ratio. In some related embodiments, a transparent display area may be disposed on the electronic device, and the photosensitive element is disposed under the transparent display area, so that the electronic device can display a full screen under the condition that the photosensitive element normally works, and the transmittance of the transparent display area is improved.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which can ensure higher light-emitting rate of screen display, obtain higher transmittance of an external light source and are beneficial to imaging of a camera under a screen.
In order to solve the above problem, in one aspect, the present invention provides a display panel including a first display region and a second display region at least partially surrounding the first display region; the first display region includes a plurality of pixel regions including,
a first anode;
a pixel defining layer disposed on the first anode, the pixel defining layer including a plurality of opening regions;
a light emitting function layer including light emitting cells of a plurality of colors, the light emitting cells being located at the opening region;
wherein: the first anode comprises a first anode body having a first anode,
the first transparent conducting layer is arranged corresponding to the pixel unit;
the first metal reflecting layer is arranged on the first transparent conducting layer and corresponds to the light-emitting unit;
the second transparent conducting layer is arranged on the first metal reflecting layer and corresponds to the light-emitting unit;
the first metal reflecting layer is provided with a groove.
In another aspect, the present invention further provides a display device, including the display panel described above.
The display panel and the display device have the advantages that the metal reflecting layer is patterned, namely the groove is formed in the metal reflecting layer, and when light emitted by the light-emitting function layer is reflected back and forth between the first reflecting layer and the cathode, a microcavity effect is formed, so that the light-emitting efficiency is enhanced, the frequency spectrum is narrowed, the transmissivity can be improved, the efficiency loss at the position under the screen is not too high, the service life is prolonged, and the imaging quality of a camera under the screen is facilitated.
Drawings
FIG. 1 is a schematic plan view illustrating a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of an area S in a first display area of the display panel shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the portion of FIG. 2 at A-A';
FIG. 4 is a schematic top view of a pixel region in the area C of FIG. 2;
FIG. 5 is a schematic cross-sectional view of a portion of FIG. 2 at B-B';
FIG. 6 is a schematic cross-sectional view of another portion of FIG. 2 at B-B';
FIG. 7 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 8 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 9 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 10 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 11 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 12 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 13 is a schematic top view of another pixel region in the area C of FIG. 2;
FIG. 14 is a schematic diagram of another enlarged partial structure of the display panel according to the embodiment of the invention;
FIG. 15 is a schematic diagram of a display device according to an embodiment of the present invention;
fig. 16 illustrates a groove arrangement in one to ten embodiments.
Detailed Description
Hereinafter, specific embodiments of a display panel and a display device according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present invention to describe relevant features of pixel groups, these relevant features of pixel groups, etc. should not be limited by these terms. These terms are only used to distinguish groups of pixels from each other. For example, the first display area may also be referred to as the second display area, and similarly, the second display area may also be referred to as the first display area without departing from the scope of embodiments of the present invention.
Through intensive and thorough research, the inventor of the present application finds that, in the related art, external light may enter the photosensitive element located below the screen through a slot (Notch) or an opening in the screen. However, none of these electronic devices is a full screen in the true sense, and cannot display in each area of the entire screen, for example, the corresponding area of the front camera cannot display the picture.
To achieve a full screen, the under-screen camera technology has become the focus of screen technology. At present, the scheme for realizing the under-screen camera mainly comprises pixel circuit design, cathode imaging, partial removal of a polaroid and the like.
The above solutions can not avoid the problem that the anode/cathode of the Organic Light Emitting Diode (OLED, the same below) is not transparent. The anode of the organic light emitting diode is an opaque metal reflecting layer; the cathode is semitransparent silver or magnesium-silver alloy, and the transmissivity is generally 40-60%. Resulting in a large amount of external light reaching the camera.
Based on intensive analysis and research on technical problems in the related art, an embodiment of the present invention provides a display panel 100, which is shown in fig. 1 to 3, where fig. 1 is a schematic plane structure diagram of a display panel in an embodiment of the present invention, fig. 2 is a schematic enlarged structure diagram of an S region in a first display region of the display panel shown in fig. 1, and fig. 3 is a schematic partial cross-sectional view at a-a' of fig. 2, the display panel includes a first display region 10 and a second display region 20, the second display region 20 at least partially surrounds the first display region 10, specifically, the first display region 10 may be a light-transmitting region, and an optical imaging unit may be integrated below the light-transmitting region, and external light penetrates through the first display region 10 of the display panel and enters the optical imaging unit to perform subsequent processing to generate required image or video data. With respect to the second display area 20, regardless of the operating state of the first display area 10, the second display area 20 is independently displayed or not displayed, and may be understood as a normal display area, or may be a transition display area, which is not limited herein. Fig. 1 only shows a case where the second display area 20 completely surrounds the first display area 10, or a case where the second display area 20 partially surrounds the first display area 10, such as a water drop screen, a slot (Notch), and the like are not limited, and the shape and the position of the first display area 10 are not limited, and may be adjusted according to actual needs. The first display region 10 includes a plurality of pixel regions 30, and it should be understood that the shape and arrangement of the pixel regions 30 are only exemplary and can be designed according to actual product requirements. Referring to fig. 3, each pixel region 30 includes a first anode 31, a pixel definition layer 32 disposed on the first anode 31, the pixel definition layer 32 including a plurality of opening regions; a light emitting function layer 33, the light emitting function layer 33 including light emitting cells 331 of a plurality of colors, the light emitting cells 331 being located in the opening area; specifically, the first anode 31 includes a first transparent conductive layer 311, and the first transparent conductive layer 311 is disposed corresponding to the light emitting unit; a first metal reflective layer 312 disposed on the first transparent conductive layer 311 and corresponding to the light emitting unit 331; a second transparent conductive layer 313 disposed on the first metal reflective layer 312 and corresponding to the light emitting unit 331; specifically, the first transparent conductive layer 311 and the second transparent conductive layer 313 may be transparent metal conductive materials, but are not limited to metal oxides such as Indium Tin Oxide (ITO), Indium zinc oxide, and the like; the first metallic reflective layer 312 may include metallic silver. The pixel region 30 further includes a cathode 34 disposed on the light-emitting functional layer 33, and the material of the cathode 34 is not limited to the magnesium-silver mixture. Optionally, the Light Emitting unit 331 provided in this embodiment may be an OLED (Organic Light Emitting Diode) structure, and specifically further includes at least one of an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, and a hole transport layer (not illustrated in the drawings); the first metal reflective layer 312 is provided with a groove 3121. This application is with the patterning of pixel area 30 first metal reflection stratum 312, for the luminousness that has promoted first display area pixel area, the function of the charge transmission of positive pole in the pixel area will be guaranteed simultaneously, thereby guarantee the normal luminousness of the luminescence functional layer in the pixel area, set up the recess on the metal reflection stratum, first metal reflection stratum partial total reflection in every pixel area promptly, part can be half-transmitted and half-reflected, form the microcavity effect when the light of luminescence functional layer outgoing makes a round trip to reflect between first reflection stratum and negative pole, thereby reinforcing luminous efficiency, when narrowing the spectrum, both can improve the transmissivity, be unlikely to again let the efficiency loss of position under the screen too high, improve the imaging quality.
In some alternative embodiments, the thickness of the first metal reflective layer within the recess 3121 is H, wherein
Referring to fig. 3, the first metal reflective layer 312 of the pixel area 30 is patterned to further increase the transmittance of the first display area 10. That is, by providing the groove 3121 on the first metal reflective layer 312, the first metal reflective layer in the groove 3121 has a thickness H, wherein
After a plurality of researches and tests, the inventor finds that the thickness of the first metal reflective layer in the groove 3121
In the meantime, the transmittance of the first metal reflective layer 312 in the pixel region 30 is lower than 30%, and the display panel needs to be provided with a polarizer to reduce the ambient reflection light at the later stage to ensure the light emitting effect, at this time, the transmittance is further reduced to 15%, so that the setting is performed
That is, the first metal reflective layer 312 in each pixel region 30 is partially totally reflective, partially transflective, and has a certain thickness
The first metal reflective layer 312 forms a microcavity effect when light emitted from the light emitting functional layer is reflected back and forth between the first reflective layer and the cathode, thereby enhancing the light emitting efficiency and narrowing the spectrumThe transmittance can be increased without lowering the luminance of the first display region 10 at the under-screen position due to an excessive efficiency loss due to the microcavity effect of the device, and thus the lifetime can be improved.
In some optional embodiments, the display panel 100 further includes a substrate base 36 disposed on a side of the first anode 31 away from the light-emitting functional layer 33, and an orthogonal projection of the first metal reflective layer 312 on the substrate base 36 covers an orthogonal projection of the opening region defined by the pixel defining layer 32 on the substrate base 36. Referring to fig. 3 to 4, fig. 4 is a schematic diagram of a top view structure of a pixel region in a region C in fig. 2, the display panel 100 further includes a substrate 36 disposed on a side of the first anode 31 away from the light-emitting functional layer 33, where the substrate 36 may be a flexible substrate or a hard substrate; illustratively, the material of the flexible substrate may be polyimide, and the material of the rigid substrate may be glass. The pixel circuit 35 is further included, and the pixel circuit 35 is configured to provide a driving current for the first anode electrode corresponding to the pixel circuit 35, specifically, the pixel circuit 35 includes a Thin-Film Transistor (TFT) (not shown), a capacitor (not shown), and other elements (not shown) and corresponding conductive traces (not shown). As shown in fig. 4, the orthographic projection of the opening area defined by the pixel defining layer 32 on the substrate 36 is Q, the orthographic projection of the first metal reflective layer 312 on the substrate 36 is M, the orthographic projection M of the first metal reflective layer 312 on the substrate 36 covers the orthographic projection Q of the opening area defined by the pixel defining layer 32 on the substrate 36, i.e. the orthographic projection M of the first metal reflective layer 312 on the substrate 36 is equal to the orthographic projection Q of the opening area defined by the pixel defining layer 32 on the substrate 36, or the orthographic projection Q of the opening area defined by the pixel defining layer 32 on the substrate 36 is within the orthographic projection M of the first metal reflective layer 312 on the substrate 36, otherwise, due to the obvious boundary of the first metal reflective layer 312, the light emitting area is divided into two parts, one part is a transparent light emitting diode (OLED) with only the second transparent conductive layer 313 and the other part is a top emitting device that is bottom opaque; the brightness of the transparent light emitting diode (OLED) is much lower than that of another top emission device, which is opaque at the bottom, so that a weak bright point of the screen appears when the screen is displayed. Optionally, when the areas of M and Q are equal and completely overlapped, that is, the boundary of the first metal reflective layer 312 is overlapped with the boundary of the opening defined by the pixel defining layer 32, in this way, the transmittance of the pixel region 30 is better, and the transmittance can reach 50% to 100%.
It should be noted that, in fig. 4, the individual film layers are subjected to the transparentization process only for showing the position projection relationship of each film layer, which does not represent the actual product application, and the size thereof does not represent the actual size either, which is not limited in this application, and the repeated portions are not described again.
Further, the boundary of the orthographic projection of the first transparent conductive layer 311 on the base substrate 36 coincides with the boundary of the orthographic projection of the first metal reflective layer 312 on the base substrate 36. Referring to fig. 3 and 4 again, the orthographic projection of the first transparent conductive layer 311 on the substrate base plate 36 is M1, and the orthographic projection of the first metal reflective layer 312 on the substrate base plate 36 is M, that is, M and M1 are completely overlapped, so that the preparation of the first metal reflective layer 312 and the first transparent conductive layer 311 can be completed only by one Mask (Mask) process, thereby simplifying the preparation process.
In some alternative embodiments, the thicknesses of the first metal reflective layers in the grooves 3121 corresponding to the light emitting units 311 of the plurality of colors are the same. Referring to fig. 2 and 5, fig. 5 is a partial cross-sectional view of the light-emitting unit 311 of fig. 2 at B-B', the display panel 100 includes a plurality of color light-emitting units 311, illustratively including a first color light-emitting unit 3311, a second color light-emitting unit 3312 and a third color light-emitting unit 3313, the thickness of the first metal reflective layer in the groove 3121 corresponding to the first color light-emitting unit 3311 is H1, the thickness of the first metal reflective layer in the groove 3121 corresponding to the second color light-emitting unit 3312 is H2, the thickness of the first metal reflective layer in the groove 3121 corresponding to the third color light-emitting unit 3313 is H3, wherein H1H 2 is H3, so that the grooves 3121 corresponding to the plurality of color light-emitting units 311 have the same depth, and the groove 3121 is prepared by only one Mask (Mask), thereby simplifying the preparation process. Otherwise, the grooves 3121 have different depths, and different masks are used to prepare the first metal reflective layer 312 when etching, that is, if there are three groove depths, the preparation is performed three times, which prolongs the preparation time.
In some alternative embodiments, the light emitting units 331 of the plurality of colors include a blue light emitting unit; the thickness of the first metal reflective layer in the groove 3121 corresponding to the blue light emitting unit is greater than the thickness of the first metal reflective layer in the grooves 3121 corresponding to the other color light emitting units 331. Referring to fig. 6, fig. 6 is another schematic sectional view of a portion of fig. 2 at B-B', the display panel 100 includes a plurality of color light emitting units 311, illustratively including a first color light emitting unit 3311, a second color light emitting unit 3312 and a third color light emitting unit 3313, the first color light emitting unit 3311 corresponds to a groove 3121 having a thickness of the first metal reflective layer H1, the second color light emitting unit 3312 corresponds to a groove 3121 having a thickness of the first metal reflective layer H2, the third color light emitting unit 3313 corresponds to a groove 3121 having a thickness of the first metal reflective layer H3, exemplarily, when the third color light emitting unit 3313 represents a blue color light emitting unit, wherein H1 is smaller than H3, and/or H2 is smaller than H3, sizes of H1 and H2 are not limited, H1 may be equal to H2 or unequal, that is not equal to the thickness of the groove 3121 corresponding to the first metal reflective layer in the groove 3121 corresponding to the blue color light emitting unit 3121 is not equal to the blue color light emitting unit Thickness of the first metal reflective layer. The reason for this is that the properties of the light emitting materials of the light emitting units 331 of different colors are different, and the life of the light emitting unit of blue color is more rapidly attenuated than that of the light emitting units of other colors, such as a red light emitting unit or a green light emitting unit, the thickness of the first metal reflective layer in the groove 3121 corresponding to the light emitting unit of blue color is made larger, and the depth of the corresponding groove 3121 is shallower than that of the groove 3121 corresponding to the light emitting units of other colors, so that the microcavity effect of the light emitting unit of blue color can be enhanced to a certain extent compared with the light emitting units of other colors, thereby relatively prolonging the life of the light emitting unit of blue color and ensuring the brightness of the light emitting unit of blue color. By designing the thickness of the first metal reflective layer in the groove 3121 corresponding to the light emitting units 311 of multiple colors in the first display area 10 differently, that is, the light emitting unit 331 with fast brightness attenuation may be provided with the shallow groove 3121 to ensure the brightness of the light emitting unit, the light emitting unit 331 with slow brightness attenuation may be provided with the deep groove 3121 to improve the transmittance, so as to better balance the lifetime and transmittance between the light emitting units of different colors, and the lifetime difference between the first display area 10 and the second display area 20 of different colors.
It should be understood that the number and size of the grooves in the above embodiments do not represent actual number and size, and can be set according to actual requirements.
In some alternative embodiments, the shape of the groove 3121 is circular, elliptical, or N-sided, and N is a positive integer, where N ≧ 4. Referring to fig. 4 and 7, fig. 7 is a schematic top view structure diagram of another pixel region in a region C in fig. 2, in fig. 4, the groove 3121 is a circle, when the groove is a circle, the transmittance of the first display region 10 is increased, meanwhile, the transmitted light rays are mutually overlapped and interfered in different directions, so as to further weaken the diffraction phenomenon, and achieve a better display effect, similarly, the groove 3121 may also be at least one of an ellipse (not illustrated), a dumbbell, gourd shape, or polygon with the number of sides greater than or equal to 4, which all have the effect of weakening the diffraction effect, as shown in fig. 5, the groove 3121 is a hexagon exemplarily.
Optionally, the first metal reflective layer 312 is provided with a plurality of grooves 3121, and the grooves 3121 are arranged in an array. Referring to fig. 8 to 13, fig. 8 to 13 all illustrate schematic top view structure diagrams of the pixel region in the region C, the plurality of grooves 3121 are arranged in an array, such as the array arrangement in fig. 8, 10, 11 and 12, or two adjacent rows are arranged in a staggered manner (not illustrated), and the plurality of grooves 3121 are arranged in an array, so that the transmittance is more uniform and the diffraction phenomenon is improved. Further, the polygonal grooves 3121 arranged in an array may be rotated, as shown in fig. 11, so that the transmitted light rays are mutually overlapped and interfered in different directions, and the diffraction phenomenon is further improved. Furthermore, the first metal reflective layer 312 is further provided with a central groove 3122, and the plurality of grooves 3121 are arranged in an annular array around the central groove 3122, as shown in fig. 9 and 12, transmitted light rays are mutually overlapped in different directions, the number of interference directions is increased, and the improvement effect of the diffraction phenomenon is better.
Further, the first metal reflective layer 312 has an arc-shaped edge. Referring to fig. 12 and 13 again, for example, fig. 12 and 13 illustrate that the first metal reflective layer 312 is circular, and when the first metal reflective layer 312 is circular, the transmitted light rays are mutually overlapped and interfered in different directions, so as to further weaken the diffraction phenomenon, and achieve a better display effect.
Optionally, the orthographic projection of the light emitting unit 331 on the substrate base plate 36 may also be at least one of a circle, an ellipse, a dumbbell, a gourd shape, or a polygon with the number of sides greater than or equal to 4 (not shown in the figure), and the transmitted light rays are mutually overlapped in different directions, so that the number of interference directions is increased, thereby further improving the diffraction phenomenon and achieving a better display effect.
It should be noted that, in the above embodiments, the width or the diameter of the groove 3121 is not strictly limited at present, and further calculation needs to be performed after the size of the first anode 31 is determined according to the resolution (PPI) of the first display region 10. Illustratively, the resolution of the first display region 10 is about 400PPI, the lower limit of the width or diameter of the groove 3121 is suggested to be 1um, and the upper limit of the width or diameter of the groove 3121 is suggested to be 20 um; for example, the resolution of the first display region 10 is 200PPI, the upper limit of the width or diameter of the groove 3121 is preferably set to 40um, which is merely illustrative and not limitative, and the width or diameter of the groove 3121 may be set according to actual requirements of the first display region 10.
In some optional embodiments, the display panel 100 further includes a pixel driving circuit 37 electrically connected to the light emitting unit 331, and the pixel driving circuit 37 electrically connected to the pixel unit 331 in the first display region 10 is at least partially located in the second display region 20. Referring to fig. 14, fig. 14 is a schematic view of another partial enlarged structure of the display panel in the embodiment of the invention, the pixel driving circuit 37 is used for providing a driving current for electrically connecting with the corresponding first anode 31, specifically, the pixel driving circuit 37 includes a thin film transistor (not shown), a capacitor (not shown) and a corresponding conductive trace 371 (only schematic connection), at least a portion of the pixel driving circuit 37 electrically connected with the light emitting unit 331 in the first display area 10 is located in the second display area 20, the pixel driving circuit 37 may be disposed near the first display area 10, for example, disposed around the first display area 10, so as to shorten a distance of the conductive trace 371, which is not limited in the present application. Meanwhile, a conductive circuit 371 connecting the pixel driving circuit 37 and the light emitting unit 331 can be arranged to be transparent to further improve the transmittance of the first display area 10, and the second display area 20 can be a transition area or a conventional display area, which is not further limited in the present application; at least part of the pixel driving circuits 37 in the first display area 10 are arranged in the second display area 20, so that the pixel driving circuits 37 can be prevented from occupying the space of the first display area 10, meanwhile, the light transmission influence caused by the metal layer and the metal wiring is reduced, the transmittance of the first display area 10 is effectively further increased, and the display effect is improved.
Based on the same inventive concept, the present invention provides a display device 200, which includes the display panel 100 provided by the above embodiments, and when implemented, the display device 200 may be: any product or component with a display function, such as a mobile phone (as shown in fig. 15), a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. The principle of the display device 200 is the same as the working principle of the embodiment of the display panel 100, and the specific structural relationship and the working principle refer to the embodiment of the display panel 100, and repeated descriptions are omitted.
Furthermore, the display apparatus 200 further includes a lighting assembly 40, and a projection of the lighting assembly 40 on a plane where the display panel 200 is located at least partially overlaps with the first display area 10. Specifically, the lighting assembly 40 includes one or a combination of a camera sensor, a light sensor such as a fingerprint sensor and an iris sensor, which is not limited in this application. The lighting assembly 40 is arranged below the first display area 10, and when the lighting assembly 40 does not work, the first display area 10 and the second display area 20 jointly display the same picture; when the lighting assembly 40 works, the first display area 10 is in a light-transmitting state so that external light can reach the lighting assembly 40 through the first display area 10 to collect pictures.
According to the display panel and the display device, the metal reflecting layer is patterned, namely the light transmittance of the pixel area of the first display area is improved, and meanwhile, the charge transmission function of the anode in the pixel area is ensured, so that the light emitting function layer in the pixel area can normally emit light, the groove is formed in the metal reflecting layer, and when light emitted by the light emitting function layer is reflected back and forth between the first reflecting layer and the cathode, a microcavity effect is formed, so that the light emitting efficiency is improved, the frequency spectrum is narrowed, the transmittance can be improved, the efficiency loss at the position under the screen is not too high, the service life is prolonged, and the imaging quality of a camera under the screen is facilitated.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. A display panel is characterized by comprising,
a first display area and a second display area at least partially surrounding the first display area; the first display region includes a plurality of pixel regions including,
a first anode;
a pixel defining layer disposed on the first anode, the pixel defining layer including a plurality of opening regions;
a light emitting function layer including light emitting cells of a plurality of colors, the light emitting cells being located at the opening region;
wherein: the first anode comprises a first anode body having a first anode,
a first transparent conductive layer disposed corresponding to the light emitting unit;
the first metal reflecting layer is arranged on the first transparent conducting layer and corresponds to the light-emitting unit;
the second transparent conducting layer is arranged on the first metal reflecting layer and corresponds to the light-emitting unit;
the first metal reflecting layer is provided with grooves, the opening area of each groove is smaller than the area of the opening area, the first metal reflecting layer in each pixel area is partially totally reflected, and part of the first metal reflecting layer is semi-transparent and semi-reflective.
2. The display panel according to claim 1,
the thickness of the first metal reflecting layer in the groove is H, wherein
3. The display panel according to claim 1,
the display panel further comprises a substrate base plate arranged on one side of the first anode far away from the light-emitting functional layer, and the orthographic projection of the first metal reflecting layer on the substrate base plate covers the orthographic projection of the opening area defined by the pixel defining layer on the substrate base plate.
4. The display panel according to claim 3,
the boundary of the orthographic projection of the first transparent conductive layer on the substrate is coincided with the boundary of the orthographic projection of the first metal reflecting layer on the substrate.
5. The display panel according to claim 2,
the thicknesses of the first metal reflecting layers in the grooves corresponding to the light-emitting units of the multiple colors are the same.
6. The display panel according to claim 2,
the light emitting cells of the plurality of colors include a blue light emitting cell;
the thickness of the first metal reflecting layer in the groove corresponding to the blue light-emitting unit is larger than the thickness of the first metal reflecting layer in the groove corresponding to the light-emitting unit of other colors.
7. The display panel according to claim 1,
the shape of the groove is circular, elliptical or N-sided, N is a positive integer, and N is more than or equal to 4.
8. The display panel according to claim 7,
the first metal reflecting layer is provided with a plurality of grooves which are arranged in an array.
9. The display panel according to claim 8,
the first metal reflecting layer is further provided with a central groove, and the grooves are arranged around the central groove in an annular array mode.
10. The display panel according to claim 8 or 9,
the first metal reflective layer has an arc-shaped edge.
11. The display panel according to claim 1,
the display panel further comprises a pixel driving circuit electrically connected with the light emitting unit, and at least part of the pixel driving circuit electrically connected with the light emitting unit in the first display area is located in the second display area.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
13. The display device according to claim 12, further comprising a light collection assembly, wherein a projection of the light collection assembly onto a plane of the display panel at least partially overlaps the first display area.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112738302B (en) * | 2020-12-24 | 2023-05-09 | 昆山工研院新型平板显示技术中心有限公司 | Electronic equipment, display screen and manufacturing method of display screen |
| CN113156721B (en) * | 2021-04-29 | 2022-08-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113744641B (en) * | 2021-08-19 | 2023-04-18 | 惠州华星光电显示有限公司 | Display device |
| KR20230101923A (en) * | 2021-11-08 | 2023-07-06 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Display panels, under-display camera devices and display devices |
| CN114388709B (en) * | 2021-12-20 | 2024-03-12 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN114420876B (en) | 2022-01-28 | 2024-02-09 | 武汉天马微电子有限公司 | Display panel and display device |
| CN114512522B (en) * | 2022-02-10 | 2024-07-05 | 厦门天马显示科技有限公司 | Display panel and display device |
| CN114597325B (en) * | 2022-03-17 | 2024-06-25 | 上海天马微电子有限公司 | Light emitting device, display panel and display device |
| WO2023206138A1 (en) * | 2022-04-27 | 2023-11-02 | 京东方科技集团股份有限公司 | Display substrate and display apparatus |
| CN117356195A (en) * | 2022-04-29 | 2024-01-05 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| CN115295583B (en) * | 2022-07-27 | 2024-07-16 | 上海天马微电子有限公司 | Display panel and display device |
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