CN111584759A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN111584759A
CN111584759A CN202010466021.8A CN202010466021A CN111584759A CN 111584759 A CN111584759 A CN 111584759A CN 202010466021 A CN202010466021 A CN 202010466021A CN 111584759 A CN111584759 A CN 111584759A
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light
layer
transmitting
display panel
transmitting layer
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CN111584759B (en
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方旭阳
彭兆基
刘明星
关彦涛
王盼盼
张志远
甘帅燕
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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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
    • 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
    • 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
    • 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

Abstract

The embodiment of the invention belongs to the technical field of display equipment, and particularly relates to a display panel and a display device. The embodiment of the invention aims to solve the problem that in the related art, light is reflected between adjacent film layers in a light-transmitting area, so that the camera device receives insufficient light. According to the display panel and the display device, the light-transmitting area is internally provided with the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer which are sequentially stacked, the refractive indexes of the first light-transmitting layer and the third light-transmitting layer are equal, and the product of the thickness of the second light-transmitting layer and the refractive index of the second light-transmitting layer is equal to the integral multiple of half of a preset light wavelength; the reflection of presetting light and taking place in second euphotic layer both sides face department can be reduced, and then make more light of presetting pass through first euphotic layer, second euphotic layer and third euphotic layer, improved the transmissivity of light, and then camera device can receive more light, has improved the image quality that camera device obtained.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display equipment, in particular to a display panel and a display device.
Background
With the development of display device technology, an Organic Light-emitting diode (OLED) display panel is often used as a display device in electronic devices such as mobile phones and tablet computers.
In the related art, a camera device (such as a front camera on a mobile phone) is often disposed on an electronic device, and a display panel covers the camera device, so that a transparent area needs to be disposed on the display panel, so that external light can pass through the transparent area and be received by the camera device. In order to ensure that light can reach the camera device through the light-transmitting area, all film layers in the light-transmitting area are made of transparent materials.
However, in each film layer in the transparent area, the refractive indexes between the adjacent film layers are different, so that light can be reflected between the adjacent film layers in the transparent area, and further, the light received by the camera device is insufficient, and the obtained image quality is poor.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display panel and a display device to solve the technical problem that the refractive index of adjacent film layers in a light-transmitting region is different, so that light is reflected between the adjacent film layers in the light-transmitting region, and thus the light received by an image capturing device is insufficient, and the quality of an obtained image is poor.
An embodiment of the present invention provides a display panel, including: the light-transmitting region is provided with a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer which are sequentially stacked, and the second light-transmitting layer is connected with the first light-transmitting layer and the third light-transmitting layer; the refractive index of the first light-transmitting layer is equal to that of the third light-transmitting layer, and the product of the thickness of the second light-transmitting layer and the refractive index of the second light-transmitting layer is equal to an integral multiple of half of the wavelength of the preset light, so that the configuration of the second light-transmitting layer improves the transmittance of the preset light between the first light-transmitting layer and the third light-transmitting layer.
The display panel as described above, wherein the thickness of the second light-transmitting layer satisfies the following formula:
Figure BDA0002512678130000021
wherein, T1Is the thickness of the second light-transmitting layer, n1The refractive index of the second light-transmitting layer, M is a positive integer, and lambda is the wavelength of the preset light.
The display panel comprises an array substrate, wherein the array substrate comprises a substrate, and a buffer layer, a plurality of interlayer dielectric layers and a planarization layer are sequentially stacked on the substrate; the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer are any adjacent three film layers in the array substrate.
The display panel as described above, wherein the first light-transmitting layer is a planarization layer, and the second light-transmitting layer and the third light-transmitting layer are two film layers in a multi-layered interlayer dielectric layer.
The display panel as described above, wherein the array substrate further includes an electrode layer disposed on a side of the planarization layer away from the substrate, and the electrode layer in the light-transmitting region is a transparent layer.
In the display panel, the first light-transmitting layer is an electrode layer, the second light-transmitting layer is the planarization layer, and the third light-transmitting layer is an interlayer dielectric layer in contact with the planarization layer.
The display panel as described above, wherein the first light-transmitting layer and the second light-transmitting layer are two film layers in the multi-layer interlayer dielectric layer, and the third light-transmitting layer is a buffer layer.
In the display panel, the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer are three layers of the multi-layer interlayer dielectric layer.
The display panel further comprises a light emitting layer, a light extraction layer, a protective layer and an encapsulation layer which are sequentially stacked, wherein the encapsulation layer comprises an organic encapsulation layer and an inorganic encapsulation layer which are stacked.
In the display panel, the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer are any adjacent three layers of the light-emitting layer, the light extraction layer, the protective layer and the encapsulation layer.
The display panel as described above, wherein the protective layer in the light-transmitting region is provided with the first light-transmitting hole.
The display panel as described above, wherein the protective layer is a lithium fluoride layer.
The display panel further comprises a touch layer, wherein the touch layer comprises a first touch layer, a connecting layer and a second touch layer which are arranged in a stacked mode, the first touch layer and the second touch layer are transparent conducting layers, and the connecting layer is a transparent insulating layer; the first light-transmitting layer is a first touch layer, the second light-transmitting layer is a connecting layer, and the third light-transmitting layer is a second touch layer.
The display panel as described above, wherein the display panel further includes a touch layer, the touch layer includes a first touch layer, a connecting layer and a second touch layer, which are stacked, the connecting layer has a connecting circuit connecting the first touch layer and the second touch layer, and the connecting circuit in the light-transmitting area has a second light-transmitting hole; and/or third light holes are formed in the first touch layer and the second touch layer in the light transmission area.
The display panel comprises an array substrate and an encapsulation layer which are arranged in a stacked mode, wherein the array substrate comprises a substrate and a channel structure arranged on the substrate, and a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer are located on one side, facing the substrate, of the channel structure; the light transmission region of one side of the channel structure facing the packaging layer is internally provided with a first light guide film, a second light guide film and a third light guide film which are sequentially stacked, and the second light guide film is jointed with the first light guide film and the third light guide film; the refractive indexes of the first light guide film and the third light guide film are equal, and the thickness of the second light guide film satisfies the following formula
Figure BDA0002512678130000031
Wherein, T2Is the thickness of the second light guiding film, n2The refractive index of the second light guide film, M is a positive integer, and lambda is the wavelength of the preset light; the configuration of the second light guide film reduces the transmittance of preset light between the first light guide film and the third light guide film.
The embodiment of the invention also provides a display device which comprises the display panel in any embodiment.
In the display panel and the display device provided in the embodiments of the present invention, the light-transmitting region has a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer, which are sequentially stacked, the second light-transmitting layer is bonded to the first light-transmitting layer and the third light-transmitting layer, refractive indexes of the first light-transmitting layer and the third light-transmitting layer are equal, and a product of a thickness of the second light-transmitting layer and a refractive index of the second light-transmitting layer is equal to an integral multiple of half of a preset light wavelength; the reflection of presetting light and taking place in second euphotic layer both sides face department can be reduced, and then make more light of presetting pass through first euphotic layer, second euphotic layer and third euphotic layer, improved the transmissivity of light, and then camera device can receive more light, has improved the image quality that camera device obtained.
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 described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device provided in this embodiment;
fig. 2 is a first schematic structural diagram of a display panel provided in this embodiment;
fig. 3 is a second schematic structural diagram of the display panel provided in this embodiment;
fig. 4 is a schematic structural diagram of a display panel according to the third embodiment;
fig. 5 is a fourth schematic structural diagram of the display panel provided in this embodiment.
Description of reference numerals:
1: a display panel;
2: packaging the cover plate;
3: a touch layer;
10: a light-transmitting region;
20: a substrate;
30: buffer layer:
40: an interlayer dielectric layer;
50: a planarization layer;
60: a light emitting layer;
70: a light extraction layer;
80: a protective layer;
90: a packaging layer;
301: a first touch layer;
302: a connecting layer;
303: a second touch layer;
304: connecting a line;
305: a second light-transmitting hole;
401: a gate insulating layer;
402: a capacitor dielectric layer;
403: an intermediate film layer;
404: a channel structure;
405: a gate layer;
406: a first pole plate layer;
407: a second diode layer;
501: an electrode layer;
601: a pixel defining layer;
602: an organic layer;
801: a first light-transmitting hole;
901: an inorganic encapsulation layer;
902: and (3) an organic packaging layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
With the gradual development of display device technology, display panels are often used as display devices of electronic devices such as mobile phones, tablet computers, intelligent wearable devices and the like; the Display panel may be an Organic Light-emitting diode (OLED) Display panel or a Liquid Crystal Display (LCD) panel. The display device is often provided with a camera device for a user to take self or collect a facial image of the user, and the display panel covers the camera device; the display panel is provided with a light-transmitting area which is opposite to the camera device, each film layer in the light-transmitting area is usually made of transparent materials, and when the camera device works, external light rays penetrate through each film layer in the light-transmitting area and then are received by the camera device, so that images are obtained.
However, in each film layer in the light-transmitting region, the materials of two adjacent film layers are often different, resulting in different refractive indexes of the two adjacent film layers; when external light passes through the light-transmitting area, the light can be reflected between the two adjacent film layers, so that the camera device receives less light, and the image quality is poor.
The application provides a display panel and display device, through in the adjacent three rete in the printing opacity district, the thickness of rete in the middle of adjusting improves the transmissivity of certain wavelength light, and then photosensitive element, if camera device can receive more light, has improved the image quality that camera device obtained.
Referring to fig. 1, in the present embodiment, the display panel 1 has a light-transmitting area 10, and the light-transmitting area 10 may be circular, drop-shaped, or the like. The display panel 1 in the light-transmitting region 10 has a first light-transmitting layer, a second light-transmitting layer, and a third light-transmitting layer, which are sequentially stacked; that is, the second light-transmitting layer is located between the first light-transmitting layer and the third light-transmitting layer. The second light-transmitting layer is bonded to the first light-transmitting layer and the third light-transmitting layer, that is, the surface of the second light-transmitting layer which faces the first light-transmitting layer is attached to the first light-transmitting layer, and the surface of the second light-transmitting layer which faces the third light-transmitting layer is attached to the third light-transmitting layer.
In this embodiment, the refractive index of the first light-transmitting layer is equal to the refractive index of the third light-transmitting layer, and the product of the thickness of the second light-transmitting layer and the refractive index of the second light-transmitting layer is equal to an integral multiple of half of the wavelength of the predetermined light. Therefore, when the preset light passes through the first euphotic layer, the second euphotic layer and the third euphotic layer, the configuration of the second euphotic layer can reduce the reflection of the preset light at the interface between the second euphotic layer and the first euphotic layer as well as the third euphotic layer, thereby improving the transmittance of the preset light at the first euphotic layer, the second euphotic layer and the third euphotic layer.
Further, the thickness of the second light-transmitting layer satisfies the following formula:
Figure BDA0002512678130000061
wherein, T1Is the thickness of the second light-transmitting layer, n1The refractive index of the second light-transmitting layer, M is a positive integer, and lambda is the wavelength of the preset light.
In the above-described embodiment, the refractive indices of the first light-transmitting layer and the third light-transmitting layer may be equal or substantially equal to each other, and the refractive indices of the first light-transmitting layer and the third light-transmitting layer may be higher than the refractive index of the second light-transmitting layer, but of course, the refractive indices of the first light-transmitting layer and the third light-transmitting layer may be lower than the refractive index of the second light-transmitting layer. For example, the first light-transmitting layer and the third light-transmitting layer may be formed using the same material or a different material, and the second light-transmitting layer may be formed using a different material from the first light-transmitting layer and the third light-transmitting layer.
In this embodiment, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be any three film layers that are continuously arranged in the lamination direction of the display panel 1 in the light-transmitting region 10 in the display panel 1. For example, the display panel 1 may include a silicon nitride film layer and a silicon oxide film layer that are alternately stacked, and accordingly, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be three of the silicon nitride film layer and the silicon oxide film layer that are alternately stacked.
In this embodiment, the positions of the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer are not limited. Further, the number of the film layers continuously arranged in the display panel 1 in the light-transmitting region 10 may be more than three, for example, the display surface in the light-transmitting region 10 may have a first film layer, a second film layer, a third film layer and a fourth film layer continuously arranged therein, and accordingly, of the first film layer, the second film layer and the third film layer, the first film layer may be a first light-transmitting layer, the second film layer is a second light-transmitting layer, and the third film layer is a third light-transmitting layer; among the second, third, and fourth film layers, the second film layer can be a first light-transmitting layer, the third film layer can be a second light-transmitting layer, and the fourth film layer can be a third light-transmitting layer; so set up, can reduce and predetermine the reflection that light takes place at second rete both sides face and third rete both sides face department, and then improve the transmissivity of light between first rete and fourth rete.
In the display panel 1 provided in this embodiment, the light-transmitting region 10 has a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer which are sequentially stacked, the second light-transmitting layer is bonded to the first light-transmitting layer and the third light-transmitting layer, the refractive indexes of the first light-transmitting layer and the third light-transmitting layer are equal, and the product of the thickness of the second light-transmitting layer and the refractive index of the second light-transmitting layer is equal to an integral multiple of half of the wavelength of the preset light; the reflection of the preset light at the two side faces of the second euphotic layer can be reduced, and the transmittance of the preset light at the first euphotic layer, the second euphotic layer and the third euphotic layer is further improved.
With reference to fig. 2, in the present embodiment, the display panel 1 includes an array substrate and a light emitting layer 60, which are stacked, and the array substrate may include a substrate 20, and a buffer layer 30, a multi-layered interlayer dielectric layer 40, a planarization layer 50, and an electrode layer 501, which are sequentially stacked and disposed on the substrate 20. The substrate 20 may be made of a transparent material such as glass, Polyimide (PI), a polycondensate of phthalic acid and ethylene glycol (PET), or the like; the buffer layer 30 may be made of silicon nitride or silicon oxide, and of course, the buffer layer 30 may also include a silicon nitride layer and a silicon oxide layer stacked in sequence; the multi-layer interlayer dielectric layer 40 is arranged between the planarization layer 50 and the buffer layer 30 in a laminated mode, a through hole is formed in the planarization layer 50, and the pixel circuit is electrically connected with the anode layer 501 through the through hole; the electrode layer 501 is arranged on the side of the planarization layer 50 facing away from the substrate 20.
Further, the array substrate is further provided with a channel structure 404, a gate layer 405, and two electrode plate layers forming a capacitor, where the two electrode plate layers may be a first electrode plate layer 406 and a second electrode plate layer 407, the first electrode plate layer 406 may be disposed on the same layer as the gate layer 405, and the second electrode plate layer 407 is disposed on a different layer from the gate layer 405. Accordingly, the interlayer dielectric layer 40 may include a gate insulating layer 401 between the channel structure 404 and the gate layer 405, a capacitor dielectric layer 402 between the first electrode plate layer 406 and the second electrode plate layer 40, one or several interlayer film layers 403 in the second electrode plate layer 40 and the planarization layer 50.
In the above implementation, the array substrate further has a source and a drain, the source and the drain are connected to the channel structure 404 through a via, and the electrode layer 501 on the side of the planarization layer 50 away from the substrate 20 is electrically connected to the source or the drain through a via.
In the above implementation, the gate layer 405, the first electrode plate layer 406, the second electrode plate layer 407, and the source and the drain in the light-transmitting region 10 may be made of a transparent conductive material (e.g., indium tin oxide), so that the light transmittance of the display panel 1 in the light-transmitting region 10 may be further improved compared to when the gate layer 405, the first electrode plate layer 406, the second electrode plate layer 407, and the source and the drain are all made of metal.
With reference to fig. 2, in this embodiment, the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer in the light-transmitting region 10 (the region corresponding to the dotted line in the figure) may be three adjacent film layers sequentially arranged along the stacking direction of the display panel 1 in the array substrate; so set up, can improve the transmittance of predetermineeing light in array substrate, and then improve array substrate's light transmittance.
Illustratively, the first light-transmitting layer may be the planarization layer 50, and correspondingly, the second light-transmitting layer and the third light-transmitting layer are two of the interlayer dielectric layer 40; in implementations where multiple intermediate film layers 403 are provided in capacitor dielectric layer 402 and planarization layer 50, the second and third light transmissive layers are two of intermediate film layers 403; in an implementation where one intermediate film layer 403 is disposed in capacitor dielectric layer 402 and planarization layer 50, the second light-transmitting layer is intermediate film layer 403, and the third light-transmitting layer may be capacitor dielectric layer 402. With this configuration, the light passing rate between the planarization layer 50 and the interlayer dielectric layer 40 can be improved.
With continued reference to fig. 2, in some implementations, the first, second, and third light transmissive layers can be three of the multilayered interlayer dielectric layer 40; illustratively, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be three of the middle film layer 403, the capacitor dielectric layer 402, and the gate insulating layer 401. When the number of the intermediate film layers 403 is three or more, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be three intermediate film layers 403; alternatively, the third light-transmitting layer is the gate insulating layer 401, the second light-transmitting layer is the capacitor dielectric layer 402, and the first light-transmitting layer is the middle film layer 403.
With continued reference to fig. 2, in an implementation of a transparent layer in which the electrode layer 501 disposed on the planarization layer 50 is made of a transparent conductive material, the first light-transmitting layer may be the electrode layer 501, the second light-transmitting layer is the planarization layer 50, and the third light-transmitting layer is the interlayer dielectric layer 40 attached to the planarization layer 50. This arrangement can improve the light transmittance between the electrode layer 501, the planarization layer 50 and the interlayer dielectric layer 40.
In some implementations, the third light transmissive layer can be the buffer layer 30, and the respective first and second light transmissive layers are two of the multilayered interlayer dielectric layer 40; illustratively, the second light-transmitting layer may be the gate insulating layer 401, and the first light-transmitting layer may be the capacitor dielectric layer 402.
In some implementations, the third light transmitting layer can be the substrate 20, the corresponding second light transmitting layer is the buffer layer 30, and the first light transmitting layer is the interlayer dielectric layer 40 adjacent to the buffer layer 30; by such an arrangement, the transmittance between the interlayer dielectric layer 40 and the substrate 20 can be improved.
With continued reference to fig. 2, in an implementation manner in which the buffer layer 30 includes silicon nitride layers and silicon oxide layers that are alternately stacked, and when the number of the film layers in the buffer layer 30 is not less than three, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be three film layers in the buffer layer 30.
With reference to fig. 3, the display panel 1 of the present embodiment further includes a light emitting layer 60, a light extraction layer 70, a protection layer 80, and an encapsulation layer 90; wherein the protective layer 80 is formed on the light extraction layer 70, and the protective layer 80 may protect the light extraction layer 70 when the encapsulation layer 90 is formed; illustratively, the protective layer 80 may be a lithium fluoride layer composed mainly of lithium fluoride, and of course, the protective layer 80 may also be a magnesium fluoride layer composed mainly of magnesium fluoride.
The encapsulation layer 90 includes an inorganic encapsulation layer 902 and an organic encapsulation layer 901, which are stacked, so that external air and water vapor can be prevented from entering the display panel 1, and the service life of the display panel 1 is prolonged.
Further, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer may be three film layers provided in this order in the stacking direction of the display panel 1 among the light-emitting layer 60, the light extraction layer 70, the protective layer 80, and the encapsulation layer 90.
Illustratively, the light-emitting layer 60 includes a pixel defining layer 601, an opening opposite to the electrode layer 501 is disposed on the pixel defining layer 601, an organic layer 602 is disposed in the opening, and the light-emitting layer 60 further includes a common electrode (not shown) covering a side of the organic layer 602 facing away from the substrate 20; in operation, an electric field is formed between the electrode layer 501 and the common electrode, thereby driving the organic layer 602 in the opening to emit light.
The pixel defining layer 601, the organic layer 602, and the common electrode in the light-transmitting region 10 may be made of a transparent material. Correspondingly, the first light-transmitting layer may be an organic encapsulation film layer or an inorganic encapsulation film layer attached to the protective layer 80, the second light-transmitting layer may be the protective layer 80, and the third light-transmitting layer is the light extraction layer 70; of course, the first light-transmitting layer may also be the protective layer 80, the second light-transmitting layer may be the light extraction layer 70, and the third light-transmitting layer may be the pixel defining layer 601 or the organic layer 602. In this embodiment, the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer can be three film layers in the encapsulation layer 90; of course, the third light transmitting layer may also be the protection layer 80, and accordingly, the first light transmitting layer and the second light transmitting layer are two film layers in the encapsulation layer 90.
With continued reference to fig. 4, in other implementations, a first light hole 801 is formed in the protective layer 80 in the light-transmitting region 10, and optionally, a corresponding portion of the encapsulation layer 90 is filled in the first light hole 801; since the light transmittance of the protective layer 80 made of lithium fluoride is low, by removing the protective layer 80 in the light-transmitting region 10, the light transmittance can be improved.
With continued reference to fig. 5, the display panel 1 provided in this embodiment further includes a touch layer 3, and the touch layer 3 can detect an action of a user touching the screen.
An encapsulation layer or an encapsulation cover plate 2 may be disposed between the light emitting layer 60 and the touch layer 3 of the display panel 1, and may be disposed according to the practical application of the display panel.
The touch layer 3 includes a first touch layer 301, a connecting layer 302, and a second touch layer 303, which are sequentially stacked, where the first touch layer 301 and the second touch layer 303 are both transparent conductive layers, and for example, the first touch layer 301 and the second touch layer 303 may both be made of indium tin oxide; the connection layer 302 is a transparent insulating layer, and the connection layer 302 is in contact with the first touch layer 301 and the second touch layer 303. When a user touches the display panel 1, capacitances are formed between the hand of the user and the first touch layer 301 and the second touch layer 303, the position of the hand of the user along the first direction can be detected through the current between the first touch layer 301 and the hand of the user, the position of the hand of the user along the second direction can be detected through the current between the second touch layer 303 and the hand of the user, and the first direction is perpendicular to the second direction, so that the position of the hand of the user on the display panel 1 can be accurately obtained.
In one implementation, the first light-transmitting layer can be the first touch layer 301, the second light-transmitting layer can be the connection layer 302, and the third light-transmitting layer can be the second touch layer 303, so that the light transmittance between the first touch layer 301 and the second touch layer 303 can be improved.
In this embodiment, a connection line 304 is further disposed in the connection layer 302, the connection line 304 is used to connect the first touch layer 301 and the second touch layer 303, and the connection line 304 can also realize connection between the first touch layer 301 and the second touch layer 303 and an external device; the connection line 304 may be made of a metal material such as molybdenum or gold. The connecting line 304 in the light-transmitting region 10 is provided with a second light-transmitting hole 305, so as to prevent the connecting line 304 from blocking light to pass through, thereby improving the transmittance of light.
In the above implementation manner, the first touch layer 301 and the second touch layer 303 in the light-transmitting area 10 may be provided with third light-transmitting holes; since the first touch layer 301 and the second touch layer 303 absorb more blue light, the loss of blue light can be reduced.
With continued reference to fig. 2 to fig. 5, in the display panel 1 provided in this embodiment, a trench structure 404 is disposed in the array substrate, and the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer are located on a side of the trench structure 404 facing the substrate 20; illustratively, the first, second, and third light transmitting layers are three film layers in the buffer layer 30 and the substrate 20. Because the channel structure 404 has the photoelectric effect, the light reflected by the film layer on the side of the channel structure 404 facing the substrate 20 toward the channel structure 404 is reduced, and the influence of the photoelectric effect on the channel structure 404 is reduced. Correspondingly, the light transmittance of the inner film layer of the array substrate is also improved.
Furthermore, in the light-transmitting region 10 on the side of the channel structure 404 facing the package layer 90, a first light guide film, a second light guide film and a third light guide film are sequentially disposed, the second light guide film is attached to the first light guide film and the third light guide film, and refractive indexes of the first light guide film and the third light guide film are equal or close.
Illustratively, the thickness of the second light directing film satisfies the following equation:
Figure BDA0002512678130000111
wherein, T2Is the thickness of the second light guiding film, n2The refractive index of the second light guide film, M is a positive integer, and lambda is the wavelength of the preset light.
So can make more the light of predetermineeing reflect to the direction of keeping away from channel structure 404 in the both sides of second leaded light membrane, the second leaded light membrane can reduce the transmissivity of predetermineeing light between first leaded light membrane and third leaded light membrane. The light received by the channel structure 404 can be further reduced, and the influence of the photoelectric effect on the channel structure 404 can be further reduced.
In this embodiment, the first light guiding film, the second light guiding film and the third light guiding film may be three films of the gate insulating layer 401, the capacitor dielectric layer 402, the middle film 403, the planarization layer 50, the light emitting layer 60, the light extraction layer 70, the protection layer 80 and the encapsulation layer 90.
It is worth to be noted that, for the three film layers sequentially stacked in the display panel 1, the refractive indexes of the film layers at the two sides are equal, and when the product of the refractive index of the middle film layer and the first thickness is an integral multiple of half of the wavelength of the preset light, the middle film layer can prevent the preset light from being reflected at the two sides of the middle film layer; when the thickness of the middle film layer is half of the first thickness, the middle film layer can promote the light to be reflected at two sides of the middle film layer.
Euphotic layer and leaded light membrane cooperation are used in this embodiment, when improving the light transmittance in light transmission district, reduce the influence of photoelectric effect to the channel structure, and both reach a balanced state, improve display panel's display quality and guarantee camera device's imaging quality simultaneously.
As shown in fig. 1 to 5, the present embodiment also provides a display device, which includes a display panel 1; optionally, the display device further comprises a housing, a camera device and a display panel 1, wherein the camera device is arranged on the housing, the display panel 1 covers the housing, and the light-transmitting area correspondingly covers the camera device; when the camera device works, external light passes through the display panel 1 and then is received by the camera device, and therefore image acquisition is achieved. The display panel 1 is the display panel 1 in the above embodiments, and is not described herein again.
The display device can be a product or a component with display and shooting functions, such as a mobile phone, a tablet personal computer, an intelligent watch, a notebook computer and the like. In the embodiment, the display device is taken as a mobile phone for description, but the display device in the embodiment is not limited thereto.
In the implementation mode that the display device is a mobile phone, the camera device can be a front camera on the mobile phone, the corresponding front camera can be positioned at the upper part of the shell of the mobile phone, and the display panel 1 covers the shell and is positioned at the outer side of the camera device; the display panel 1 has a light-transmitting area 10 facing the image capturing device, so that external light can pass through the light-transmitting area 10 and be received by the image capturing device, thereby obtaining an image.
In the display device provided in this embodiment, the light-transmitting region 10 of the display panel 1 has a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer, which are sequentially stacked, where the second light-transmitting layer is bonded to the first light-transmitting layer and the third light-transmitting layer, refractive indexes of the first light-transmitting layer and the third light-transmitting layer are equal, and a product of a thickness of the second light-transmitting layer and a refractive index of the second light-transmitting layer is equal to an integral multiple of half of a preset light wavelength; the reflection of presetting light and taking place in second euphotic layer both sides face department can be reduced, and then make more light of presetting pass through first euphotic layer, second euphotic layer and third euphotic layer, improved the transmissivity of light, and then camera device can receive more light, has improved the image quality that camera device obtained.
In the above implementation, the preset light may be light that is beneficial for the image capturing device to obtain an image, and the quality of the image obtained by the image capturing device is improved by increasing the transmittance of the preset light in the light-transmitting area 10.
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 still 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 (10)

1. A display panel, comprising: the light-transmitting region is provided with a first light-transmitting layer, a second light-transmitting layer and a third light-transmitting layer which are sequentially stacked, and the second light-transmitting layer is connected with the first light-transmitting layer and the third light-transmitting layer; the refractive index of the first light-transmitting layer is equal to that of the third light-transmitting layer, and the product of the thickness of the second light-transmitting layer and the refractive index of the second light-transmitting layer is equal to an integral multiple of half of the wavelength of a preset light ray, so that the configuration of the second light-transmitting layer improves the transmittance of the preset light ray between the first light-transmitting layer and the third light-transmitting layer.
2. The display panel according to claim 1, wherein the thickness of the second light-transmitting layer satisfies the following formula:
Figure FDA0002512678120000011
wherein, T1Is the thickness of the second light-transmitting layer, n1The refractive index of the second light-transmitting layer, M is a positive integer, and λ is the wave of the predetermined lightLong.
3. The display panel according to claim 1, wherein the display panel comprises an array substrate, the array substrate comprises a substrate, and a buffer layer, a plurality of interlayer dielectric layers and a planarization layer are sequentially stacked on the substrate; the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer are any adjacent three film layers in the array substrate.
4. The display panel according to any one of claims 1 to 3, wherein the display panel further comprises a light-emitting layer, a light extraction layer, a protective layer, and an encapsulation layer, which are sequentially stacked, and the encapsulation layer comprises an organic encapsulation layer and an inorganic encapsulation layer, which are stacked.
5. The display panel according to claim 4, wherein the first light-transmitting layer, the second light-transmitting layer, and the third light-transmitting layer are any adjacent three film layers among the light-emitting layer, the light extraction layer, the protective layer, and the encapsulation layer.
6. The display panel according to claim 4, wherein a first light hole is provided in the protective layer in the light transmissive region.
7. The display panel according to any one of claims 1 to 3, wherein the display panel further comprises a touch layer, the touch layer comprises a first touch layer, a connecting layer and a second touch layer which are stacked, the first touch layer and the second touch layer are transparent conductive layers, and the connecting layer is a transparent insulating layer; the first light-transmitting layer is the first touch layer, the second light-transmitting layer is the connecting layer, and the third light-transmitting layer is the second touch layer.
8. The display panel according to any one of claims 1 to 3, wherein the display panel further comprises a touch layer, the touch layer comprises a first touch layer, a connecting layer and a second touch layer, the first touch layer, the connecting layer and the second touch layer are stacked, the connecting layer has a connecting line therein, the connecting line in the light-transmitting region has a second light-transmitting hole;
and/or third light holes are formed in the first touch layer and the second touch layer in the light transmission area.
9. The display panel according to claim 2, wherein the display panel comprises an array substrate and an encapsulation layer which are stacked, the array substrate comprises a substrate and a channel structure arranged on the substrate, and the first light-transmitting layer, the second light-transmitting layer and the third light-transmitting layer are located on one side of the channel structure facing the substrate;
in the light-transmitting area, one side of the channel structure, which faces the packaging layer, is provided with a first light guide film, a second light guide film and a third light guide film which are sequentially stacked, and the second light guide film is connected with the first light guide film and the third light guide film; the refractive indexes of the first light guide film and the third light guide film are equal, and the thickness of the second light guide film meets the following formula:
Figure FDA0002512678120000021
wherein, T2Is the thickness of the second light guiding film, n2Is the refractive index of the second light directing film; so that the configuration of the second light guide film reduces the transmittance of the preset light between the first light guide film and the third light guide film.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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CN110911581A (en) * 2019-11-14 2020-03-24 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
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