CN110335955B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110335955B CN110335955B CN201910335288.0A CN201910335288A CN110335955B CN 110335955 B CN110335955 B CN 110335955B CN 201910335288 A CN201910335288 A CN 201910335288A CN 110335955 B CN110335955 B CN 110335955B
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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
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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
- H10K50/84—Passivation; Containers; Encapsulations
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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
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Abstract
The invention provides a display panel and a display device, wherein the display panel comprises a plurality of light-emitting units arranged on an array substrate, a thin film packaging layer positioned on the light-emitting units, a black matrix positioned on the thin film packaging layer and a plurality of filter layers corresponding to the light-emitting units, wherein the thickness of the thin film packaging layer is n times of lambda/2, lambda is the wavelength of one light emitted by the light-emitting units, and n is an odd number. The display panel provided by the invention inhibits the outward reflection of the external incident light in the display panel, reduces the emergent quantity of the external ambient light after the external ambient light is reflected in the display panel, reduces the reflectivity of the external ambient light, and solves the problem that the display effect of the display panel is greatly influenced because the reflectivity of the external ambient light is higher in the conventional panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Display screens have been widely used in many fields such as portable electronic devices (e.g., mobile communication terminals, tablet computers, electronic books, and navigation devices) and large-screen electronic devices, wherein Organic Light-Emitting diodes (OLEDs) are increasingly used in display screens due to their advantages of low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility.
At present, in an OLED display screen, a Color Filter (CF) and a Black Matrix (BM) are specifically formed on a thin film encapsulation layer by adopting a BM-CF technique to replace a circular polarizer (because the polarizer is thick and hard), wherein the Black Matrix is used as a Color definition structure to shield light, the Color Filter is used for transmitting light with the same Color as the Color of the Color Filter, and when the Color Filter is arranged, the BM and the CF are often arranged on the thin film encapsulation layer, and the BM separates the CFs.
However, the display panel has a problem of high ambient light reflectivity during use, so that the display effect of the display panel is affected.
Disclosure of Invention
In order to solve at least one of the problems mentioned in the background art, the present invention provides a display panel and a display device, which inhibit the external ambient light from being reflected outward in the display panel, reduce the reflectivity of the ambient light, and solve the problem that the display effect of the display panel is greatly affected due to the high reflectivity of the external ambient light in the existing panel.
In order to achieve the above object, the present invention provides a display panel including a plurality of light emitting cells disposed on an array substrate, a thin film encapsulation layer on the light emitting cells, a black matrix on the thin film encapsulation layer, and a plurality of filter layers corresponding to the light emitting cells,
the thickness of the thin film packaging layer is n times of lambda/2, lambda is the wavelength of one of the lights emitted by the light emitting unit, and n is an odd number.
The display panel provided by the invention comprises a plurality of light-emitting units arranged on an array substrate, a film packaging layer arranged on the light-emitting units, a plurality of filter layers arranged on the film packaging layer and corresponding to the light-emitting units, and a black matrix used for separating the filter layers, wherein the thickness of the film packaging layer is odd times of lambda/2, and lambda is the wavelength of one light emitted by the light-emitting units, so that the optical path difference of the incident light with the wavelength between two interfaces in the display panel meets the odd times of lambda/2 of the light, according to the cancellation principle of half-wavelength odd times, the reflected lights after the incident light with the wavelength is reflected in the display panel are mutually cancelled, and the outward reflection of the incident light is suppressed, compared with the prior art, the display panel provided by the invention achieves the purpose of suppressing the outward reflection of one incident light in the display panel, the emergent amount of the reflected light is reduced, the reflectivity of the external incident light is reduced, and the normal display effect of the display panel is ensured, therefore, the display panel provided by the application inhibits the outward reflection of one of the lights in the external environment light from the display panel, thereby reducing the emergent amount of the external environment light after the internal reflection of the display panel, reducing the reflectivity of the external environment light, and solving the problem that the display effect of the display panel is greatly influenced because the reflectivity of the external environment light is higher in the existing panel.
In the display panel, optionally, the film encapsulation layer has a first encapsulation area, a second encapsulation area and a third encapsulation area which are respectively in contact with a red filter layer, a blue filter layer and a green filter layer of the plurality of filter layers, and the thicknesses of the film encapsulation layer corresponding to at least two of the first encapsulation area, the second encapsulation area and the third encapsulation area are λ1N of/21Multiple sum lambda2N of/22Multiple, wherein, the lambda1And said λ2Respectively the wavelengths of any two of red light, blue light and green light emitted by the light-emitting unit, and n1And said n2Is an odd number.
In the above display panel, optionally, the thickness of the thin film encapsulation layer corresponding to the first encapsulation region is λ1N of/21The thickness of the thin film packaging layer corresponding to the second packaging area is lambda2N of/22The thickness of the thin film packaging layer corresponding to the third packaging area is lambda3N of/23Multiple of, and said λ1Is the wavelength of red light emitted by the light emitting unit, the lambda2Is the wavelength of blue light emitted by the light emitting unit, the lambda3For the wavelength of the green light emitted by the light-emitting unit, n1N is the same as the above2And said n3Is an odd number.
In the display panel, optionally, a fourth encapsulation area in contact with the black matrix is further disposed on the film encapsulation layer, and a thickness of the film encapsulation layer corresponding to the fourth encapsulation area is the same as a thickness of the film encapsulation layer corresponding to one of the two adjacent encapsulation areas.
In the display panel, optionally, a first organic film layer, a second organic film layer and a third organic film layer are arranged in the film encapsulation layer, the first organic film layer, the second organic film layer and the third organic film layer correspond to the red filter layer, the blue filter layer and the green filter layer in the light emitting unit respectively and are spaced from each other, and thicknesses of at least two organic film layers in the first organic film layer, the second organic film layer and the third organic film layer are λ1N of/24Multiple sum lambda2N of/25Multiple, wherein, the lambda1And said λ2Respectively the wavelengths of any two of red light, blue light and green light emitted by the light-emitting unit, and n4And said n5Is an odd number, and said n4And said n5Are all less than or equal to n.
In the above display panel, optionally, the thickness of the first organic film layer is λ1N of/24The thickness of the second organic film layer is lambda2N of/25The thickness of the third organic film layer is lambda3N of/26Multiple of, and said λ1Is the wavelength of red light emitted by the light emitting unit, the lambda2Is the wavelength of blue light emitted by the light emitting unit, the lambda3For the wavelength of the green light emitted by the light-emitting unit, n4N is the same as the above5And said n5Is an odd number, and said n4N is the same as the above5N is the same as the above6Are all less than or equal to n.
In the above display panel, optionally, the film package includes a first inorganic film layer and a second inorganic film layer, the first organic film layer, the second organic film layer and the third organic film layer are disposed on the first inorganic film layer, the second inorganic film layer covers the first inorganic film layer, the first organic film layer, the second organic film layer and the third organic film layer, and the black matrix and the filter layer are disposed on the second inorganic film layer.
In the above display panel, optionally, the light emitting unit includes a first electrode layer, an organic light emitting layer, and a second electrode layer, which are sequentially stacked, the film encapsulation layer is disposed on the second electrode layer, and a concave-convex structure is formed on a surface of the second electrode layer facing the film encapsulation layer.
In the above display panel, optionally, the second electrode layer is a transparent electrode layer.
The invention also provides a display device comprising any one of the display panels.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a conventional display panel;
fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the invention;
fig. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present invention.
Description of reference numerals:
10-an array substrate; 20-a light emitting unit; 21-a first electrode layer; 22-a second electrode layer;
23-an organic light-emitting layer; 30-a thin film encapsulation layer; 31-a first encapsulation area; 32-a second package region; 33-a third encapsulation zone; 34-a fourth package region; 310-a first inorganic film layer; 320-a second inorganic film layer; 301-a first organic film layer; 302-a second organic film layer; 303-a third organic film layer; 40-black matrix; 50-a filter layer; 50 a-a red filter layer; 50 b-green filter layer; 50 c-blue filter layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the embodiments of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
Fig. 2 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the invention, and fig. 3 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the invention.
The inventor of the present invention found in the actual research process that the current display panel has a problem of high ambient light reflectivity, and the inventor found that the reason for the problem is that: in the conventional display panel, a circular polarizer is used to eliminate reflection of the cathode surface to the external ambient light, but because the circular polarizer has a large thickness and is hard, which is not beneficial to bending, in order to reduce the thickness of the display panel and improve the bending performance, specifically, as shown in fig. 1, the display panel includes an array substrate, a plurality of light emitting units disposed on the array substrate, and a Thin-Film Encapsulation layer 200 (TFE) covering the light emitting units and the array substrate, each light emitting unit includes an anode layer, an organic light emitting layer (such as an organic light emitting layer 101, an organic light emitting layer 102, an organic light emitting layer 103) and a cathode layer 104 sequentially stacked on the array substrate, and a filter and a black matrix 300 are formed on the Thin-Film Encapsulation layer 200 by adopting the BM-CF technology to replace the circular polarizer, so that the display panel can be bent and reduced in thickness, but during the use, when the ambient light (as shown by the solid arrow in fig. 1) is irradiated onto the BM (black matrix 300), the BM absorbs the ambient light, so that the ambient light irradiated onto the BM cannot enter the inside of the display panel, but the ambient light enters from the CF (e.g., filter 401, filter 402, and filter 403), passes through the thin film encapsulation layer 200, is reflected at the cathode layer 104, and is emitted outward, where an incident path and a reflection path are shown by arrows in fig. 1, where the reflection path is an opposite path of the incident path, which causes all the incident light irradiated onto the filter to be reflected, so that the reflectivity of the ambient light is large, and the display effect of the display panel is affected.
Based on the above findings and the existing technical problems, the embodiments of the present invention provide the following solutions: referring to fig. 2 to 3, the present embodiment provides a display panel, which includes a plurality of light emitting units 20 disposed on an array substrate 10 and a thin film encapsulation layer 30 disposed on the light emitting units 20, wherein the light emitting units 20 specifically include a first electrode layer 21, a second electrode layer 22 and an organic light emitting layer 23 disposed between the first electrode layer 21 and the second electrode layer 22, wherein the organic light emitting layer 23 specifically includes a red organic light emitting layer R, a green organic light emitting layer G and a blue organic light emitting layer B, wherein adjacent organic light emitting layers 23 are separated by a pixel defining layer, in the present embodiment, one of the first electrode layer 21 and the second electrode layer 22 may be a cathode layer and the other is an anode layer, in fig. 2, the second electrode layer 22 is a cathode layer, the first electrode layer 21 is an anode layer, in the present embodiment, the thin film encapsulation layer 30 specifically covers the second electrode layer 22, in this embodiment, the structure of the array substrate specifically refers to the existing array substrate structure, and in this embodiment, the structure and the working principle of the array substrate are not described in detail.
In this embodiment, a plurality of filter layers 50 corresponding to the light emitting units and the black matrix 40 are disposed on the thin film encapsulation layer 30, as shown in fig. 2, the filter layers 50 specifically include a red filter layer 50a, a green filter layer 50B and a blue filter layer 50c, wherein the red filter layer 50a corresponds to the red organic light emitting layer R in the vertical direction, the green filter layer 50B corresponds to the green organic light emitting layer G in the vertical direction, the blue filter layer 50c corresponds to the blue organic light emitting layer B in the vertical direction, the red filter layer 50a is used for transmitting the red light emitted from the red organic light emitting layer, the rest of the light cannot be transmitted, the green filter layer 50B is used for transmitting the green light emitted from the green organic light emitting layer, the rest of the light cannot be transmitted, the blue filter layer 50c is used for transmitting the blue light emitted from the blue organic light emitting layer, and the rest of the light cannot be transmitted, correspondingly, when the external environment light irradiates the display panel, the red light in the external environment light can penetrate into the display panel from the red filter layer 50a, the blue light in the external environment light can penetrate into the display panel from the blue filter layer 50c, and the green light in the external environment light can penetrate into the display panel from the green filter layer 50b, wherein in this embodiment, the adjacent filter layers 50 are separated from each other by the black matrix 40.
In the present embodiment, in order to reduce the reflectivity of the incident light from the outside, specifically, as shown in fig. 2, the thickness d of the thin film encapsulation layer 30 is n times of λ/2, λ is the wavelength of one of the lights emitted from the light emitting unit 20, for example, the red light, the blue light or the green light emitted from the light emitting unit 20, and n is an odd number, that is, the thickness d of the thin film encapsulation layer 30 is an odd number times of λ/2, so that the distance between the top surface of the thin film encapsulation layer 30 and the top surface of the second electrode in the light emitting unit 20 is an odd number times of λ/2, when the incident light passes from the top surface of the filter layer to the second electrode layer of the light emitting unit 20, the optical path difference between the two interfaces is an odd number times of λ/2, when the incident light is reflected at the two interfaces, the optical path difference between the two reflected lights is an odd number times of λ/2, and according to the principle that the odd number times of half wavelengths cancel, the incident light entering from the filter layer proceeds on the top surface of the thin film encapsulation layer 30 and the second electrode layer of the light emitting unit 20 Two reflected lights are cancelled, that is, the reflected light of the external incident light is cancelled in the display panel and is not reflected to the outside, so as to achieve the purpose of inhibiting the external ambient light from being reflected outwards, and finally reduce the reflectivity of the display panel, wherein in the embodiment, because λ is the wavelength of one of the lights emitted by the light emitting unit 20, the thickness d of the thin film encapsulation layer 30 satisfies an odd multiple of λ/2 of one of the lights, so that the light transmitted through the filter layer satisfies the cancellation condition, thereby avoiding the external reflection of the incident light, that is, inhibiting the external reflection of the incident light of one color in the external ambient light, and in the prior art, the filter layer of the external ambient light is totally reflected after being transmitted, so that, compared with the prior art, in the embodiment, the external reflection of one of the incident light is inhibited, therefore, the emergent amount of the reflected light is reduced, the reflectivity of the external environment light is reduced, and the display effect of the display panel is reduced under the influence of the external environment light.
In this embodiment, as shown in fig. 2, a thickness d of the thin film encapsulation layer 30 may be an odd multiple of 1/2 of the wavelength of red light, and when ambient light is filtered by the filter layer, red incident light, blue incident light, and green incident light are obtained, respectively, and a path difference between two interfaces of the red incident light in the display panel satisfies an odd multiple of 1/2 of the wavelength of red light, so that reflected light of the red incident light is cancelled (as shown in fig. 2), and at this time, the blue incident light and the green incident light do not satisfy an odd multiple of 1/2 of the corresponding wavelength, and are reflected in the display panel and then emitted outward (as indicated by an upward solid arrow in fig. 2), that is, the purpose of suppressing the outward reflection of red light is achieved, or in this embodiment, the thickness d of the film encapsulation layer 30 may be an odd multiple of 1/2 of the wavelength of green light, so that the optical path difference between two interfaces of green light passing through the filter layer satisfies the cancellation condition of odd half-wavelength, and reflected light of green incident light is cancelled, so as to achieve the purpose of suppressing the outward reflection of green light, or in this embodiment, the thickness d of the film encapsulation layer 30 may be an odd multiple of 1/2 of the wavelength of blue light, so that the optical path difference between two interfaces of blue light passing through the filter layer satisfies the cancellation condition of odd half-wavelength, and reflected light of blue incident light is cancelled, so as to achieve the purpose of suppressing the outward reflection of blue light. Therefore, in the embodiment, the outward reflection of the red light, the green light or the blue light in the external environment light is suppressed, the emergent amount of the red light, the green light and the blue light after being reflected in the display panel is reduced, and the reflectivity of the external environment light is reduced.
In this embodiment, n is an odd number, and may be an odd number such as 1, 3, or 5, where n is specifically selected according to actual requirements.
Therefore, the display panel provided by this embodiment includes a plurality of light emitting units 20 disposed on the array substrate, a thin film encapsulation layer 30 disposed on the light emitting units 20, a plurality of filter layers disposed on the thin film encapsulation layer 30 and corresponding to the light emitting units 20, and a black matrix 40, where a thickness d of the thin film encapsulation layer 30 is an odd multiple of λ/2, and λ is a wavelength of one of the lights emitted by the light emitting units 20, so that an optical path difference between two interfaces of the incident light with the wavelength in the display panel satisfies the odd multiple of λ/2 of the one of the lights, and according to a half-wavelength odd multiple cancellation principle, reflected lights of the incident light with the wavelength after being reflected in the display panel cancel each other out, so as to suppress outward reflection of the one of the incident lights in the display panel, compared with the prior art, the display panel of this application achieves a purpose of suppressing outward reflection of the one of the incident lights in the display panel, the emergent amount of the reflected light is reduced, the reflectivity of the external incident light is reduced, and the normal display effect of the display panel is ensured, therefore, the display panel provided by the application inhibits the outward reflection of one of the lights in the external environment light from the display panel, thereby reducing the emergent amount of the external environment light after the internal reflection of the display panel, reducing the reflectivity of the external environment light, and solving the problem that the display effect of the display panel is greatly influenced because the reflectivity of the external environment light is higher in the existing panel.
Furthermore, when the thickness d of the thin film encapsulation layer 30 is an odd multiple of λ/2, only one of the light can be reflected in the display panel for suppressing, on the basis of the above-mentioned embodiments, in the present embodiment, in order to suppress the reflection of other light in the external environment light in the display panel, specifically, the thin film encapsulation layer 30 has the first encapsulation region 31, the second encapsulation region 32 and the third encapsulation region 33 respectively contacting with the red filter layer 50a, the blue filter layer 50c and the green filter layer 50b in the plurality of filter layers 50, that is, in the present embodiment, the area of the thin film encapsulation layer 30 in contact with the red filter layer 50a is the first encapsulation area 31, the area of the thin film encapsulation layer 30 in contact with the blue filter layer 50c is the second encapsulation area 32, and the area of the thin film encapsulation layer 30 in contact with the green filter layer 50b is the third encapsulation area 33.
In this embodiment, the thicknesses of the thin film encapsulation layers 30 corresponding to at least two of the first encapsulation area 31, the second encapsulation area 32 and the third encapsulation area 33 are λ1N of/21Multiple sum lambda2N of/22X, wherein λ1And λ2Wavelengths n of any two of red, blue and green light emitted from the light emitting unit 20, respectively1And n2Is odd, wherein, in the embodiment, the thicknesses of the thin film encapsulation layers 30 of two of the first encapsulation area 31, the second encapsulation area 32 and the third encapsulation area 33 are λ1N of/21Multiple sum lambda2N of/22The thickness d1 of the first encapsulation area 31 is, for example, λ1N of/21The thickness d2 of the second package region 32 is λ2N of/22Multiple, at this time, λ1May be a red wavelength, λ2The wavelength of the blue light is such that the optical path difference between the incident red light and the incident blue light in the external environment light satisfies the cancellation condition of odd half-wavelength times, so that the reflected light of the red light and the reflected light of the blue light in the display panel are cancelled, thereby inhibiting the outward reflection of the red light and the blue light in the external environment light from the display panel, and further reducing the reverse reflection of the external environment light in the display panelThe emergent quantity after the emission reduces the reflectivity of the external environment light.
Alternatively, the thicknesses of the three package regions, i.e., the first package region 31, the second package region 32, and the third package region 33, are λ1N of/21Multiple sum lambda2N of/22By the thickness d1 of the first encapsulation area 31, for example, λ1N of/21The thickness d2 of the second package region 32 is λ1N of/21The thickness d3 of the third encapsulation area 33 is λ2N of/22Multiple, such that1May be a red wavelength, λ2At green wavelengths, or in this embodiment, the thickness d1 of the first package region 31 is λ2N of/22The thickness d2 of the second package region 32 is λ1N of/21The thickness d3 of the third encapsulation area 33 is λ2N of/22Multiple, lambda1May be a blue wavelength, λ2Since the thicknesses of the two package regions are the same, in this embodiment, the thicknesses of the regions corresponding to the red filter layer 50a, the blue filter layer 50c, and the green filter layer 50b on the thin film package layer 30 are adjusted, so as to suppress the outward reflection of at least two incident lights in the external ambient light in the display panel, thereby reducing the outgoing amount of the external incident lights and reducing the reflectivity of the external ambient light.
Wherein, in the present embodiment, n1And n2May be the same as or different from n described above, and may be, for example, 1 or 3, and in the present embodiment, n is1And n2May be the same or different.
Further, on the basis of the above-mentioned embodiments, in this embodiment, in order to achieve the purpose of suppressing the outward reflection of the red light, the green light and the blue light entering the display panel, specifically, the thickness d1 of the thin film encapsulation layer 30 corresponding to the first encapsulation area 31 is λ1N of/21The thickness d2 of the thin film encapsulation layer 30 corresponding to the second encapsulation area 32 is λ2N of/22The thickness d3 of the thin film encapsulation layer 30 corresponding to the third encapsulation area 33 is λ3N of/23Multiple, and λ1Is the wavelength, lambda, of the red light emitted by the light-emitting unit 202To send outWavelength, λ, of blue light emitted by the light unit 203Is the wavelength of green light emitted by the light emitting unit 20, n1、n2And n3The number of the red filter layers 50a, the blue filter layers 50c, and the green filter layers 50b is odd, so that the ambient light is filtered by the red filter layer 50a, the blue filter layer 50c, and the green filter layer 50b to obtain the red incident light, the blue incident light, and the green incident light, respectively, and the optical path difference of the red incident light between the first package region 31 and the second electrode layer of the light emitting unit 20 satisfies λ1The odd-number multiple cancellation condition of/2 is satisfied, so that the reflected lights of the red incident lights in the display panel cancel each other out, thereby achieving the purpose of suppressing the outward reflection of the red incident lights, and accordingly, the optical path difference of the blue incident lights on the two interfaces of the second package region 32 and the second electrode layer of the light emitting unit 20 satisfies λ2The odd-number multiple cancellation condition of/2 is satisfied, so that the reflected lights of the blue incident lights in the display panel cancel each other out, thereby achieving the purpose of suppressing the outward reflection of the blue incident lights, and accordingly, the optical path difference of the green incident lights at the two interfaces of the third package region 33 and the second electrode layer of the light emitting unit 20 satisfies λ2The odd multiple cancellation condition of/2 is adopted, so that the reflected lights of the green incident lights in the display panel are mutually cancelled, and the purpose of suppressing the outward reflection of the green incident lights is achieved, and finally, the reflected lights of the red incident lights, the blue incident lights and the green incident lights entering the display panel are all mutually cancelled, namely, in the embodiment, the outward reflection of the external environment lights in the display panel is suppressed, so that the influence of the external environment lights on the display effect of the display panel is avoided.
Further, on the basis of the above embodiment, in this embodiment, the film encapsulation layer 30 further has a fourth encapsulation region 34 in contact with the black matrix 40, and a thickness of the film encapsulation layer 30 corresponding to the fourth encapsulation region 34 is the same as a thickness of the film encapsulation layer 30 corresponding to one of the two adjacent encapsulation regions, for example, the fourth encapsulation region 34 is disposed between the first encapsulation region 31 and the second encapsulation region 32, at this time, a thickness of the film encapsulation layer 30 corresponding to the fourth encapsulation region 34 may be the same as a thickness of the film encapsulation layer 30 at the first encapsulation region 31, or a thickness of the film encapsulation layer 30 corresponding to the fourth encapsulation region 34 may be the same as a thickness of the film encapsulation layer 30 at the second encapsulation region 32.
Example two
Fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present invention.
The difference between the display panel provided by the present embodiment and the first embodiment is as follows: in the present embodiment, the thickness of the packaging film layer may be the same at the corresponding positions of the filter layers 50, so that, in order to achieve the purpose of suppressing the reflection of the rest of the incident light, specifically, as shown in fig. 4, a first organic film layer 301, a second organic film layer 302 and a third organic film layer 303 are disposed in the film packaging layer 30, which correspond to the red filter layer 50a, the blue filter layer 50c and the green filter layer 50B in the light emitting unit 20 and are spaced from each other, that is, the first organic film layer 301 corresponds to the red filter layer 50a, the second organic film layer 302 corresponds to the blue filter layer 50c, and the third organic film layer 303 corresponds to the green filter layer 50B, in the present embodiment, it should be noted that, since the red filter layer 50a, the blue filter layer 50c and the green filter layer 50B correspond to the red organic light emitting layer R, the blue organic light emitting layer B and the green organic light emitting layer G in the light emitting unit 20, therefore, in the present embodiment, the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303 also correspond to the red organic light emitting layer R, the blue organic light emitting layer B and the green organic light emitting layer G, respectively.
In this embodiment, at least two of the first organic film 301, the second organic film 302, and the third organic film 303 have a thickness λ1N of/24Multiple sum lambda2N of/25X, wherein λ1And λ2Wavelengths n of any two of red, blue and green light emitted from the light emitting unit 20, respectively4And n5Is an odd number, and n4And n5Are all less than or equal to n, specifically, in this embodiment, the thicknesses of two organic film layers among the first organic film layer 301, the second organic film layer 302, and the third organic film layer 303 are λ1N of/24Multiple sum lambda2N of/25For example, the thickness d4 of the first organic film layer 301 is λ1N of/24The thickness d5 of the second organic film layer 302 is λ2N of/25Multiple, lambda1May be a red wavelength, λ2The wavelength of the blue light is, at this time, the optical path difference of the two interfaces in the display panel after the incidence of the red light and the blue light in the external environment light respectively meets the cancellation condition of odd times of half wavelength, so that the reflected light of the red light and the reflected light of the blue light in the display panel are cancelled, and the outward reflection of the red light and the blue light in the external environment light from the display panel is restrained.
Alternatively, in this embodiment, the thicknesses of the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303 are λ1N of/24Multiple, lambda2N of/25Multiple, lambda2N of/25Or, the thicknesses of the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303 are λ2N of/25Multiple, lambda1N of/24Multiple, lambda2N of/25And (4) doubling.
Further, on the basis of the above embodiment, in this embodiment, in order to achieve the purpose of suppressing the outward reflection of the red light, the green light and the blue light entering into the display panel, the thickness d4 of the first organic film layer 301 is λ1N of/24The thickness d5 of the second organic film layer 302 is λ2N of/25The thickness d6 of the third organic film 303 is λ3N of/26Multiple, and λ1Is the wavelength, lambda, of the red light emitted by the light-emitting unit 202Is the wavelength, lambda, of the blue light emitted by the light-emitting unit 203Is the wavelength of green light emitted by the light emitting unit 20, n4、n5And n5Is an odd number, and n4、n5、n6N, that is, in this embodiment, the thicknesses of the first organic film layer 301, the second organic film layer 302, and the third organic film layer 303 all satisfy the optical path difference of the corresponding cancellation of odd half-wavelength multiples of the reflected light, so that the reflected lights of the red incident light, the blue incident light, and the green incident light entering the display panel are all cancelled out, that is, in this embodiment, the outward reflection of the external environment light in the display panel is suppressed, thereby the influence of the external environment light on the display effect of the display panel is avoided, so, in this embodiment, the thickness of the thin film encapsulation layer 30 is equal to or less than n, and in this embodiment, the thicknesses of the first organic film layer 301, the second organic film layer 302, and the third organic film layer 303 all satisfy the optical path difference of the cancellation of the odd times of the half-wavelength of the reflected light, so that all the reflected lights of the red incident light, the blue incident light, and the green incident light entering the display panel are cancelled outThe degree is kept unchanged, and specifically, the reflection of incident light is suppressed by adjusting the thicknesses of the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303 to reach the condition of cancellation of odd half-wavelength times, so that the manufacturing difficulty of the packaging film layer is reduced.
Wherein, in the present embodiment, n4、n5And n5Can be the same or different, for example, when n is 3, in this case n4、n5And n5Is 3, when n is 5, then n4、n5And n5And may be 3 or 1.
Further, on the basis of the above embodiment, in this embodiment, the thin film encapsulation layer 30 includes the first inorganic film layer 310 and the second inorganic film layer 320, the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303 are disposed on the first inorganic film layer 310, the second inorganic film layer 320 covers the first inorganic film layer 310, the first organic film layer 301, the second organic film layer 302 and the third organic film layer 303, and the black matrix 40 and the filter layer 50 are disposed on the second inorganic film layer 320.
EXAMPLE III
The difference between the display panel provided by the present embodiment and the first embodiment is as follows: in this embodiment, the concave-convex structure is formed on the surface of the second electrode layer 22 facing the thin film encapsulation layer 30, and the concave-convex structure increases the surface roughness of the second electrode layer 22, so that when incident light reaches the concave-convex structure, diffuse reflection easily occurs on the concave-convex structure, so that the light path of the incident light changes, and the black matrix 40 shields part of the reflected light, thereby reducing the outgoing amount of the reflected light and achieving the purpose of reducing the light reflectivity of the external environment.
In this embodiment, when the concave-convex structure is formed on the second electrode layer 22, specifically, the concave-convex structure may be formed on the second electrode layer 22 by solution etching.
Further, on the basis of the above embodiments, in the present embodiment, the second electrode layer 22 is a transparent electrode layer, so that the incident light can penetrate through the second electrode layer 22 when reaching the second electrode layer 22, and the reflection of the incident light on the second electrode layer 22 is reduced or avoided.
In this embodiment, it should be noted that, when all incident light entering the display panel from the external environment is reflected after the display panel, the purpose of cancellation can be achieved, and at this time, since all incident light can be suppressed from being reflected outward, it is not necessary to provide the concave-convex structure on the second electrode layer 22 and to provide the second electrode layer 22 as a transparent electrode layer.
Example four
The present embodiment provides a display panel, and the display panel is specifically a flexible OLED panel, wherein the flexible OLED panel includes a plurality of light emitting units 20 disposed on an array substrate 10 and a thin film encapsulation layer 30 disposed on the light emitting units 20, the thin film encapsulation layer 30 is provided with a plurality of filter layers 50 corresponding to the light emitting units and a black matrix 40, as shown in fig. 2, the filter layers 50 specifically include a red filter layer 50a, a green filter layer 50B and a blue filter layer 50c, wherein the red filter layer 50a corresponds to a red organic light emitting layer R in a vertical direction, the green filter layer 50B corresponds to a green organic light emitting layer G in the vertical direction, and the blue filter layer 50c corresponds to a blue organic light emitting layer B in the vertical direction.
In the present embodiment, in order to reduce the reflectivity of the incident light from the outside, specifically, as shown in fig. 2, the thickness d of the thin film encapsulation layer 30 is n times of λ/2, λ is the wavelength of one of the lights emitted from the light emitting unit 20, for example, the red light, the blue light or the green light emitted from the light emitting unit 20, and n is an odd number, that is, the thickness d of the thin film encapsulation layer 30 is an odd number times of λ/2, so that the distance between the top surface of the thin film encapsulation layer 30 and the top surface of the second electrode in the light emitting unit 20 is an odd number times of λ/2, when the incident light passes through from the top surface of the filter layer to the second electrode layer 22 of the light emitting unit 20, the optical path difference between the two interfaces is an odd number times of λ/2, when the incident light is reflected at the two interfaces, the optical path difference between the two reflected lights is an odd number times of λ/2, and according to the principle that the odd number times of half wavelengths cancel, the incident light entering from the filter layer enters on the top surface of the thin film encapsulation layer 30 and the second electrode layer 22 of the light emitting unit 20 The two reflected lights are cancelled after reflection, namely the reflected lights of the external incident lights are cancelled in the display panel and are not reflected to the outside, so that the purpose of inhibiting the external ambient lights from being reflected outwards is achieved, and finally the reflectivity of the display panel is reduced.
For other structures of the display panel provided in this embodiment, reference may be made to those described in the foregoing embodiments, and details in this embodiment are not repeated.
Therefore, compared with the existing display panel with a circular polarizer, the flexible OLED panel provided by the embodiment achieves the purposes of being ultrathin and bendable, and compared with the existing display panel with CF and BM, achieves the purpose of low reflection of external environment light.
EXAMPLE five
The fifth embodiment of the present invention provides a display device, where the display device may be a flexible OLED display device, or may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a tablet computer, an intelligent watch, an electronic book, and a navigator that includes an OLED display device.
In this embodiment, the display device includes the display panel of any one of the embodiments, and in this embodiment, the structure, function, and implementation of the display panel may refer to the detailed description in the embodiments, which is not repeated herein.
The display device provided by the embodiment comprises the display panel, so that the optical path difference of at least one incident light between two interfaces in the display panel meets the odd number times of lambda/2 of the light, according to the half-wavelength odd number times cancellation principle, the reflected lights of at least one incident light after being reflected in the display panel are mutually cancelled, and the outward reflection of the incident light is inhibited, compared with the prior art, the outward reflection of the incident light is inhibited in the display panel, so that the emergent quantity of the reflected light is reduced, the reflectivity of the external incident light is reduced, and the normal display effect of the display panel is ensured, therefore, the display device provided by the application inhibits the outward reflection of the external environment light from the display panel, so that the emergent quantity of the external environment light after being reflected in the display panel is reduced, and the reflectivity of the external environment light is reduced, the problem of in the current panel because the reflectivity of external environment light is higher and cause display panel display effect to receive very big influence is solved.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A display panel comprises a plurality of light emitting units arranged on an array substrate, a thin film encapsulation layer arranged on the light emitting units, a black matrix arranged on the thin film encapsulation layer, and a plurality of filter layers corresponding to the light emitting units,
the thickness of the thin film packaging layer is n times of lambda/2, lambda is the wavelength of one of the lights emitted by the light emitting unit, and n is an odd number;
the film packaging layer is internally provided with a first organic film layer, a second organic film layer and a third organic film layer which respectively correspond to the red filter layer, the blue filter layer and the green filter layer in the light-emitting unit and are mutually spaced, and the thicknesses of at least two organic film layers in the first organic film layer, the second organic film layer and the third organic film layer are respectively lambda1N of/24Multiple sum lambda2N of/25Multiple, wherein, the lambda1And said λ2Respectively the wavelengths of any two of red light, blue light and green light emitted by the light-emitting unit, and n4And said n5Is an odd number, and said n4And said n5Are all less than or equal to n.
2. The display panel according to claim 1, wherein the thin film encapsulation layer has a first encapsulation region, a second encapsulation region, and a third encapsulation region thereon, which are in contact with a red filter layer, a blue filter layer, and a green filter layer of the plurality of filter layers, respectively, and the thicknesses of the thin film encapsulation layer corresponding to at least two of the first encapsulation region, the second encapsulation region, and the third encapsulation region are λ1N of/21Multiple sum lambda2N of/22Multiple, wherein, the lambda1And said λ2Respectively the wavelengths of any two of red light, blue light and green light emitted by the light-emitting unit, and n1And said n2Is an odd number.
3. The display panel of claim 2, wherein the thin film seal corresponding to the first sealing regionThe thickness of the layer is lambda1N of/21The thickness of the thin film packaging layer corresponding to the second packaging area is lambda2N of/22The thickness of the thin film packaging layer corresponding to the third packaging area is lambda3N of/23Multiple of, and said λ1Is the wavelength of red light emitted by the light emitting unit, the lambda2Is the wavelength of blue light emitted by the light emitting unit, the lambda3For the wavelength of the green light emitted by the light-emitting unit, n1N is the same as the above2And said n3Is an odd number.
4. The display panel according to claim 3, wherein a fourth encapsulating region in contact with the black matrix is further formed on the thin film encapsulating layer, and a thickness of the thin film encapsulating layer corresponding to the fourth encapsulating region is the same as a thickness of the thin film encapsulating layer corresponding to one of two adjacent encapsulating regions.
5. The display panel of claim 4, wherein the first organic film layer has a thickness λ1N of/24The thickness of the second organic film layer is lambda2N of/25The thickness of the third organic film layer is lambda3N of/26Multiple of, and said λ1Is the wavelength of red light emitted by the light emitting unit, the lambda2Is the wavelength of blue light emitted by the light emitting unit, the lambda3For the wavelength of the green light emitted by the light-emitting unit, n4N is the same as the above5And said n5Is an odd number, and said n4N is the same as the above5N is the same as the above6Are all less than or equal to n.
6. The display panel according to claim 5, wherein the thin film package comprises a first inorganic film layer and a second inorganic film layer, wherein the first, second, and third organic film layers are provided on the first inorganic film layer, wherein the second inorganic film layer covers the first, second, and third inorganic film layers, and wherein the black matrix and the filter layer are provided on the second inorganic film layer.
7. The display panel according to any one of claims 1 to 6, wherein the light-emitting unit includes a first electrode layer, an organic light-emitting layer, and a second electrode layer, which are sequentially stacked, the thin film encapsulation layer is disposed on the second electrode layer, and a surface of the second electrode layer facing the thin film encapsulation layer forms a concave-convex structure.
8. The display panel according to claim 7, wherein the second electrode layer is a transparent electrode layer.
9. A display device comprising the display panel according to any one of claims 1 to 8.
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| CN110911581B (en) | 2019-11-14 | 2021-05-07 | 深圳市华星光电半导体显示技术有限公司 | Display panel, manufacturing method thereof and electronic equipment |
| CN111725270A (en) * | 2020-06-08 | 2020-09-29 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and preparation method thereof |
| CN114403835B (en) * | 2021-12-31 | 2023-11-07 | 北京津发科技股份有限公司 | Wearable multi-index fusion physiological intelligent sensor system and physiological index monitoring method |
| CN117501852A (en) * | 2022-04-20 | 2024-02-02 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN115275051B (en) * | 2022-07-21 | 2023-11-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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