CN113224250A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113224250A CN113224250A CN202110476004.7A CN202110476004A CN113224250A CN 113224250 A CN113224250 A CN 113224250A CN 202110476004 A CN202110476004 A CN 202110476004A CN 113224250 A CN113224250 A CN 113224250A
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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
- 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
- H10K50/85—Arrangements for extracting light from the devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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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
- H10K59/40—OLEDs integrated with touch screens
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Abstract
The embodiment of the application provides a display panel and a display device, the display panel replaces a polarizer by arranging an optical adjusting layer between a touch layer and a cover plate layer, wherein the optical adjusting layer comprises a black matrix and a plurality of dimming units, the black matrix comprises a plurality of first openings, at least one dimming unit is arranged in one first opening, emergent light of the display panel is led out through the dimming unit, the refractive index of one side, close to a substrate, of the dimming unit is smaller than the refractive index of one side, far away from the substrate, of the dimming unit, meanwhile, the dimming unit is provided with two high-light-transmitting materials with different refractive indexes, so that the external incident light is totally reflected at the interface between the two high-light-transmitting materials with different refractive indexes and is absorbed by the black matrices on two adjacent sides of the adjusting unit, the luminous flux of the ambient light entering the display panel is reduced, and the contrast of, the light extraction efficiency of the display panel is further improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
In a display panel of an Active Matrix Organic Light Emitting Diode (AMOLED), a thin film transistor is used for driving, so that each pixel can be independently lighted, and the display panel has the advantages of high brightness, high resolution, low power consumption, easiness in realizing color change, large-area display and the like, and is a commonly adopted method at present.
In the manufacturing process of the display panel, a circular polarizer is usually disposed on the outer side of the display surface of the display panel, so as to reduce the luminous flux of ambient light entering the display panel, improve the contrast of the display panel, and enhance the visibility of the picture. However, the transmittance of the circular polarizer is generally around 42%, which greatly reduces the luminous efficiency of the display panel.
Therefore, a display panel and a display device are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, which aims to improve the technical problem that the luminous efficiency of the current display panel is reduced due to the arrangement of a polarizer.
The embodiment of the application provides a display panel, which comprises a substrate and an optical adjusting layer arranged on the substrate, wherein the optical adjusting layer comprises a black matrix and a plurality of dimming units, the black matrix comprises a plurality of first openings, and at least one dimming unit is arranged in one first opening;
the emergent light of the display panel is guided out through the dimming unit, and the dimming unit is close to the refractive index of one side of the substrate and is smaller than the refractive index of one side of the substrate far away from the dimming unit.
Optionally, in some embodiments of the present application, the dimming unit includes a first light-transmitting layer and a second light-transmitting layer located on the first light-transmitting layer, where the second light-transmitting layer is disposed away from the substrate;
wherein the refractive index of the first light-transmitting layer is less than the refractive index of the second light-transmitting layer.
Optionally, in some embodiments of the present application, at least one first protrusion is disposed on a surface of the first light-transmitting layer on a side away from the substrate, and a first groove corresponding to the first protrusion is disposed on a side of the second light-transmitting layer close to the first light-transmitting layer.
Optionally, in some embodiments of the present application, a surface of the second light-transmitting layer on a side away from the first light-transmitting layer and a surface of the black matrix on a side away from the substrate are located on the same plane.
Optionally, in some embodiments of the application, at least one second protrusion is disposed on a surface of the second light-transmitting layer on a side away from the substrate, and each first protrusion is disposed corresponding to at least one second protrusion.
Optionally, in some embodiments of the present application, the curvature of the first protrusion is not equal to the curvature of the second protrusion.
Optionally, in some embodiments of the present application, the refractive index of the dimming cell gradually increases along a light transmission direction of the display panel.
Optionally, in some embodiments of the present application, the optically modifying layer has a thickness in a range from 2 microns to 4 microns.
Optionally, in some embodiments of the present application, the display panel further includes an array structure layer on the substrate, a light emitting function layer on the array structure layer, a thin film encapsulation layer on the light emitting function layer, a touch layer on the thin film encapsulation layer, and a cover plate layer;
the light-emitting functional layer comprises a plurality of light-emitting devices, one light-emitting device corresponds to one first opening, and emergent light emitted by the light-emitting device is led out of the display panel through the first opening; the optical adjusting layer is located between the touch layer and the cover plate layer.
Correspondingly, the embodiment of the application also provides a display device which comprises the display panel.
In the embodiment of the application, the optical adjusting layer is arranged between the touch layer and the cover plate layer to replace the polarizer, wherein the optical adjustment layer comprises a black matrix and a plurality of light modulation units, the black matrix comprises a plurality of first openings, at least one light modulation unit is arranged in one first opening, and the emergent light of the display panel is led out through the light modulation unit, the refractive index of the light modulation unit close to the substrate side is smaller than that of the light modulation unit far away from the substrate side, meanwhile, the light modulation unit is provided with two high light transmission materials with different refractive indexes, so that the external incident light is totally reflected at the interface between the two high light transmission materials with different refractive indexes and is absorbed by the black matrixes positioned at the two adjacent sides of the light modulation unit, therefore, the luminous flux of the ambient light entering the display panel is reduced, the contrast of the display panel is improved, and the light emitting efficiency of the display panel is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a first cross-sectional view of a display panel of the present application;
fig. 2A is a light path diagram of a display panel according to the present application after external light is incident on a dimming unit;
fig. 2B is a light path diagram of the display panel according to the present application after the emergent light exits to the dimming unit;
FIG. 3 is a second cross-sectional view of a display panel of the present application;
FIG. 4 is a third cross-sectional view of a display panel of the present application;
fig. 5 is a light path diagram of emergent light passing through a dimming unit in a display panel according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application aims at the technical problem that the luminous efficiency of a display panel in the prior art is reduced due to the arrangement of the polaroid, and the technical problem can be solved.
Referring to fig. 1 to 3, an embodiment of the present invention provides a display panel 100, including a substrate 10 and an optical adjustment layer 60 disposed on the substrate 10, where the optical adjustment layer 60 includes a black matrix 61 and a plurality of light modulation units 62, the black matrix 61 includes a plurality of first openings 611, and at least one of the light modulation units 62 is disposed in one of the first openings 611.
The emergent light of the display panel 100 is led out through the dimming unit 62, and the refractive index of the dimming unit 62 close to one side of the substrate 10 is smaller than the refractive index of the dimming unit 62 far away from one side of the substrate.
In the embodiment of the application, the optical adjusting layer is arranged between the touch layer and the cover plate layer to replace the polarizer, wherein the optical adjustment layer comprises a black matrix and a plurality of light modulation units, the black matrix comprises a plurality of first openings, at least one light modulation unit is arranged in one first opening, and the emergent light of the display panel is led out through the light modulation unit, the refractive index of the light modulation unit close to the substrate side is smaller than that of the light modulation unit far away from the substrate side, meanwhile, the light modulation unit is provided with two high light transmission materials with different refractive indexes, so that the external incident light is totally reflected at the interface between the two high light transmission materials with different refractive indexes and is absorbed by the black matrixes positioned at the two adjacent sides of the light modulation unit, therefore, the luminous flux of the ambient light entering the display panel is reduced, the contrast of the display panel is improved, and the light emitting efficiency of the display panel is further improved.
The technical solution of the present application will now be described with reference to specific embodiments.
Example one
Fig. 1 is a cross-sectional structural view of a display panel according to a first embodiment of the present application.
The display panel 100 provided in the embodiment of the present application may include a substrate 10, an array structure layer 20 on the substrate 10, a light emitting function layer 30 on the array structure layer 20, a thin film encapsulation layer 40 on the light emitting function layer 30, a touch layer 50 on the thin film encapsulation layer 40, and a cover plate layer 70.
In this embodiment, the light-emitting function layer 30 includes a plurality of light-emitting devices, one of the light-emitting devices corresponds to one of the first openings 611, and the emergent light emitted by the light-emitting device is guided out of the display panel 100 through the first opening 611.
Specifically, an optical adjustment layer 60 is disposed between the touch layer 50 and the cover plate layer 70, the optical adjustment layer 60 includes a black matrix 61 and a plurality of dimming units 62, the black matrix 61 includes a plurality of first openings 611, and at least one dimming unit 62 is disposed in one of the first openings 611.
The emergent light of the display panel 100 is led out through the dimming unit 62, and the refractive index of the dimming unit 62 close to one side of the substrate 10 is smaller than the refractive index of the dimming unit 62 far away from one side of the substrate.
Specifically, the substrate 10 is a flexible substrate, and the substrate 10 specifically includes a first flexible layer 101, a barrier layer 102 disposed on the first flexible layer 101, and a second flexible layer 103 disposed on the barrier layer 102.
Specifically, the array structure layer 20 includes a first buffer layer 201 disposed on the second flexible layer 103, a second buffer layer 202 disposed on the first buffer layer 201, an active layer 203 disposed on the second buffer layer 202, a first gate insulating layer 204 disposed on the second buffer layer 202 and covering the active layer 203, a first gate layer 205 disposed on the first gate insulating layer 204, a second gate insulating layer 206 disposed on the first gate insulating layer 204 and covering the first gate layer 205, a second gate layer 207 disposed on the second gate insulating layer 206, an interlayer insulating layer 208 disposed on the second gate insulating layer 206 and completely covering the second gate layer 207, a source/drain metal layer 210 disposed on the interlayer insulating layer 208, a planarization layer 211 disposed on the interlayer insulating layer 208 and completely covering the source/drain metal layer 210, a gate-source metal layer 201, a source/drain metal layer 205, and a gate-drain metal layer, An anode metal layer 212 disposed on the planarization layer 211, a pixel defining layer 213 disposed on the planarization layer 211 and partially covering the anode metal layer 212, and a spacer layer 214 disposed on the pixel defining layer 213.
The source and drain metal layers 210 are electrically connected with two ends of the active layer 203 through via holes, and the anode metal layer 212 is electrically connected with the source and drain metal layers 210; the non-display area of the display panel is provided with an organic insulating layer 209, and the organic insulating layer 209 sequentially penetrates through the interlayer insulating layer 208, the second gate insulating layer 206, the first gate insulating layer 204, the second buffer layer 202 and the first buffer layer 201 from top to bottom and exposes the second flexible layer 103. The organic insulating layer 209 according to the embodiment of the present application is mainly configured to relieve stress generated when the display panel 100 is bent.
In the embodiment of the present application, referring to fig. 1, the dimming unit 62 includes a first transparent layer 621 and a second transparent layer 622 located on the first transparent layer 621, where the second transparent layer 622 is disposed away from the substrate 10; the refractive index of the first light-transmitting layer 621 is smaller than that of the second light-transmitting layer 622.
In the embodiment of the present application, at least one first protrusion 6211 is disposed on a surface of the first light-transmitting layer 621 on a side away from the substrate 10, and a first groove 6221 corresponding to the first protrusion 6211 is disposed on a side of the second light-transmitting layer 622 close to the first light-transmitting layer 621.
As shown in fig. 2A, it is a light path diagram of the display panel according to the present application after the external light enters the dimming unit;
when the incident light L1 from the outside enters the interface between the second light-transmitting layer 622 and the first light-transmitting layer 621, since the refractive index of the second light-transmitting layer 622 is greater than that of the first light-transmitting layer 621, when the incident angle of the incident light L1 is greater than the critical angle, the refracted light will disappear, and all the incident light L1 will be reflected without entering the first light-transmitting layer 621. At this time, at least one first protrusion 6211 is disposed on a surface of the first light-transmitting layer 621 away from the substrate 10, so as to increase an incident angle of the incident light L1, and further increase a probability of total reflection of the incident light L1, so that the incident light L1 is totally reflected and then is completely absorbed by the black matrix 61.
As shown in fig. 2B, it is a light path diagram of the display panel 100 after the outgoing light L2 exits to the dimming unit 62;
when the outgoing light L2 emitted from the light-emitting functional layer 30 in the display panel 100 exits from the interface between the second light-transmitting layer 622 and the first light-transmitting layer 621, since the refractive index of the first light-transmitting layer 621 is smaller than that of the second light-transmitting layer 622, the outgoing light L2 enters the optically dense medium from the optically thinner medium, and the refraction angle is larger than the incident angle, so that the outgoing light L2 is concentrated to the center position close to the second light-transmitting layer 622; at this time, at least one first protrusion 6211 is disposed on a surface of the first light-transmitting layer 621 away from the substrate 10, so as to increase an incident angle of the outgoing light L2, and further increase a refraction angle of the outgoing light L2 after passing through the second light-transmitting layer 622, so that the outgoing light L2 passing through the second light-transmitting layer 622 can be collected.
In this embodiment, a surface of the second light-transmitting layer 622 on a side away from the first light-transmitting layer 621 and a surface of the black matrix 61 on a side away from the substrate 10 are not in the same plane. At this time, the second transparent layer 622 and the cover plate layer 70 form a cavity, and since the refractive index of air is smaller than that of the cover plate layer 70, the incident light L1 can be totally reflected at the interface between the cover plate layer 70 and air, so that the incident light L1 from the outside can be reduced; meanwhile, since the refractive index of air is smaller than that of the second light-transmitting layer 622, the refraction angle of the outgoing light L2 passing through the second light-transmitting layer 622 can be increased, and the outgoing light L2 passing through the second light-transmitting layer 622 can be further converged.
To solve the technical problem of the prior art that the display panel has reduced luminous efficiency due to the arrangement of the polarizer, in the embodiment of the present application, the black matrix 61 is used to reduce the reflection of the external light above the pixel definition layer 213, and meanwhile, the plurality of dimming units 62 are correspondingly arranged above the light emitting functional layer 30. The refractive index of the side of the dimming cell 62 close to the substrate 10 is smaller than the refractive index of the side of the dimming cell 62 away from the substrate, so that the external incident light is totally reflected in the dimming cell 62 and is absorbed by the black matrix 61, thereby reducing the reflection of the external light and replacing the polarizer. In the embodiment of the application, the optical adjusting layer 60 is designed to replace a polarizer, so that on one hand, the bending performance of the display panel can be improved; on the other hand, compared with the polarizer, the optical adjustment layer 60 has a higher transmittance, so that the light-emitting efficiency of the light-emitting functional layer 30 can be improved, and the power consumption of the display panel can be reduced.
Example two
Specifically, the present embodiment is the same as or similar to the first embodiment, and the difference is only that:
as shown in fig. 3, a cross-sectional structure diagram of a display panel according to a second embodiment of the present application is provided.
In this embodiment, the dimming unit 62 includes a first light-transmitting layer 621 and a second light-transmitting layer 622 located on the first light-transmitting layer 621, and a surface of the second light-transmitting layer 622 on a side away from the first light-transmitting layer 621 and a surface of the black matrix 61 on a side away from the substrate 10 are located on the same plane. The advantage of this configuration is to effectively prevent the external moisture from remaining on the interface between the dimming cell 62 and the black matrix 61, thereby reducing the erosion of the interface between the dimming cell 62 and the black matrix 61 caused by the external moisture.
To solve the technical problem of the prior art that the display panel has reduced luminous efficiency due to the arrangement of the polarizer, in the embodiment of the present application, the black matrix 61 is used to reduce the reflection of the external light above the pixel defining layer 213, and the plurality of dimming units 62 are correspondingly arranged above the light emitting functional layer 30. The refractive index of the side of the dimming cell 62 close to the substrate 10 is smaller than the refractive index of the side of the dimming cell 62 away from the substrate, so that the external incident light is totally reflected in the dimming cell 62 and is absorbed by the black matrix 61, thereby reducing the reflection of the external light and replacing the polarizer. Meanwhile, the surface of the second light-transmitting layer 622 on the side away from the first light-transmitting layer 621 and the surface of the black matrix 61 on the side away from the substrate 10 are located on the same plane, so that the erosion of external moisture to the interface between the dimming unit 62 and the black matrix 61 can be reduced. In the embodiment of the application, the optical adjusting layer 60 is designed to replace a polarizer, so that on one hand, the bending performance of the display panel can be improved; on the other hand, compared with the polarizer, the optical adjustment layer 60 has a higher transmittance, so that the light-emitting efficiency of the light-emitting functional layer 30 can be improved, and the power consumption of the display panel can be reduced.
EXAMPLE III
As shown in fig. 4, a cross-sectional structure diagram of a display panel provided in a third embodiment of the present application is shown.
In the embodiment of the present application, the dimming unit 62 includes a first light-transmitting layer 621 and a second light-transmitting layer 622 located on the first light-transmitting layer 621, where the second light-transmitting layer 622 is disposed away from the substrate 10; the refractive index of the first light-transmitting layer 621 is smaller than that of the second light-transmitting layer 622.
In the embodiment of the present application, at least one first protrusion 6211 is disposed on a surface of the first light-transmitting layer 621 on a side away from the substrate 10, and a first groove 6221 corresponding to the first protrusion 6211 is disposed on a side of the second light-transmitting layer 622 close to the first light-transmitting layer 621. The first protrusion 6211 can reflect external reflected light to the black matrix 61 more easily.
Specifically, the difference between the third embodiment of the present application and the first embodiment of the present application is only that at least one second protrusion 6222 is disposed on the surface of the second light-transmitting layer 622 on the side away from the substrate 10, and each of the first protrusions 6211 is disposed corresponding to at least one of the second protrusions 6222.
In this embodiment, the second protrusion 6222 is provided mainly for the purpose of:
in a first aspect, for the external incident light L1, the incident light L1 enters the optically denser medium (the second transparent layer 622) from the optically thinner medium (the cover plate layer 70), the refraction angle is greater than the incident angle, and meanwhile, the second protrusion 6222 can increase the incident angle of the incident light L1, and further increase the refraction angle of the incident light L1, so that the incident light L1 converges toward the center position away from the second transparent layer 622, and thus the interference of the incident light L1 on the display panel 100 is reduced, and the contrast of the display panel 100 is further improved.
In a second aspect, for the outgoing light L2 of the light-emitting functional layer 30, the outgoing light L2 enters the optically thinner medium (cover plate layer 70) from the optically denser medium (second light-transmitting layer 622), and when the incident angle of the outgoing light L2 is greater than the critical angle, the outgoing light L2 is totally reflected at the interface between the second light-transmitting layer 622 and the cover plate layer 70; therefore, only the outgoing light L2 (incident angle is smaller than the critical angle) at a certain angle can pass through the cover plate layer 70, thereby increasing the brightness of the display panel 100. Meanwhile, the second protrusion 6222 is disposed to increase the incident angle of the outgoing light L2, so as to increase the probability of total reflection of the outgoing light L2, and further increase the brightness of the display panel 100.
In the present embodiment, the arc of the first protrusion 6211 is not equal to the arc of the second protrusion 6222. Wherein the arc of the second protrusion 6222 is less than the arc of the first protrusion 6211. This arrangement can effectively increase the probability of total reflection of the external incident light at the interface between the first light-transmitting layer 621 and the second light-transmitting layer 622, so that the external incident light is totally reflected in the dimming unit 62 and absorbed by the black matrix 61, thereby reducing the reflection of the external light.
In the embodiment of the present application, the height of the first protrusion 6211 may be greater than the height of the second protrusion 6222, so that the interference of the external incident light L1 to the display panel 100 may be further reduced, and meanwhile, the outgoing light L2 of the display panel 100 may be further gathered, thereby increasing the light emitting brightness of the display panel 100.
In the embodiment of the present application, since the second light transmitting layer 622 has the second protrusion 6222, the cover plate layer 70 and the second light transmitting layer 622 have a cavity, and the cavity can reduce the incident light L1 from the outside; meanwhile, the refraction angle of the outgoing light L2 passing through the second light-transmitting layer 622 is increased, and the outgoing light L2 passing through the second light-transmitting layer 622 is further converged, so that the light-emitting brightness of the display panel 100 is increased.
To solve the technical problem of the prior art that the display panel has reduced luminous efficiency due to the arrangement of the polarizer, in the embodiment of the present application, the black matrix 61 is used to reduce the reflection of the external light above the pixel definition layer 213, and meanwhile, the plurality of dimming units 62 are correspondingly arranged above the light emitting functional layer 30. The dimming unit 62 includes a first light-transmitting layer 621 and a second light-transmitting layer 622 located on the first light-transmitting layer 621, the second light-transmitting layer 622 is disposed away from the substrate 10, and a refractive index of the first light-transmitting layer 621 is smaller than a refractive index of the second light-transmitting layer 622. The surface of the first light-transmitting layer 621 away from the substrate 10 is provided with at least one first protrusion 6211, the surface of the second light-transmitting layer 622 away from the substrate 10 is provided with at least one second protrusion 6222, each first protrusion 6211 is disposed corresponding to at least one second protrusion 6222, so that external incident light is totally reflected in the light-adjusting unit 62, and is absorbed by the black matrix 61, thereby reducing reflection of external light, and replacing a polarizer. In the embodiment of the application, the optical adjusting layer 60 is designed to replace a polarizer, so that on one hand, the bending performance of the display panel can be improved; on the other hand, compared with the polarizer, the optical adjustment layer 60 has a higher transmittance, so that the light-emitting efficiency of the light-emitting functional layer 30 can be improved, and the power consumption of the display panel can be reduced.
In the above embodiments of the present application, the first light-transmitting layer 621 and the second light-transmitting layer 622 are made of high light-transmitting materials, and the transmittance thereof is generally required to be greater than 90%, that is, the transmittance of the first light-transmitting layer 621 and the second light-transmitting layer 622 is far greater than the transmittance (42%) of a conventional polarizer, and by setting a material with high transmittance to replace the polarizer, the light-emitting efficiency of the display panel 100 can be effectively improved.
In the above-described embodiments of the present application, the range of the refractive index n1 of the first light-transmitting layer 621 is 1 < n1 < 1.5, and the range of the refractive index n2 of the second light-transmitting layer 622 is 1.7 < n2 < 1.9. This arrangement can ensure that the incident light from the outside can be more easily totally reflected at the interface between the first light-transmitting layer 621 and the second light-transmitting layer 622.
In the above-described embodiments of the present application, the material of the first light-transmitting layer 621 and the second light-transmitting layer 622 may be at least one of a photoresist, an organic substance, and an inorganic substance, as long as both satisfy the requirements of high transmittance and refractive index.
In the above embodiments of the present application, the thickness of the black matrix 61 ranges from 2um to 3um, preferably 3 um. If the thickness of the black matrix 61 is less than 2um, the black matrix 61 cannot well absorb external incident light; if the thickness of the black matrix 61 is greater than 4um, the black matrix 61 is difficult to satisfy the light and thin requirement of the display panel 100. Because the thickness of the optical adjustment layer 60 is the thickness of the black matrix, and the thickness of the black matrix is far smaller than the thickness (about 100 um) of a conventional polarizer, the design of replacing the polarizer by the optical adjustment layer 60 can be beneficial to the dynamic bending of the display panel 100.
FIG. 5 is a diagram of a light path of emergent light passing through a dimming unit in a display panel according to the present application;
wherein, a1, b1, c1 and d1 do from four different refractive index materials down to the top in the unit 62 of adjusting luminance, the refractive index of unit 62 of adjusting luminance is followed display panel 100's printing opacity direction gradually increases, the emergent light of luminous functional layer 30 is constantly by light sparse medium entering optical density medium, and the angle of incidence constantly reduces after refracting, sets up like this and can make the light that luminous functional layer 30 sent passes through gather after the unit 62 of adjusting luminance refracts, thereby increase display panel 100's luminance.
In another scheme of the embodiment of the present application, the refractive index of the dimming unit 62 gradually decreases from the center position to the edge position of the dimming unit 62, the light emitted from the light emitting functional layer 30 enters the optically denser medium close to the center position from the optically thinner medium at the edge, and the incident angle decreases; then, the emergent light of the light-emitting functional layer 30 enters the light sparse medium at the edge from the optically dense medium close to the central position, the incident angle starts to increase, and when the emergent light is far away from the central position, a total reflection phenomenon occurs, so that only light with a certain angle can penetrate through the dimming unit 62, and meanwhile, the emergent light of the light-emitting functional layer 30 is converged to the central position of the dimming unit 62, thereby increasing the light-emitting brightness of the display panel 100.
In the above embodiments of the present application, the material of the first flexible layer 101 and the second flexible layer 103 is polyimide, and the material of the barrier layer 102 is silicon nitride or silicon oxide. This application embodiment adopts double-deck polyimide structure to replace traditional glass substrate or individual layer polyimide structure, can realize display panel's folding and flexible display, realizes better buckling and water oxygen barrier property simultaneously.
In the above embodiments of the present application, the display panel 100 adopts a dual-gate structure, and the dual-gate structure has better performance than a single-gate structure, such as higher electron mobility, larger on-state current, smaller sub-threshold swing, better stability and uniformity of threshold voltage, better gate bias and illumination stability, and the like.
In the above embodiments of the present application, the cover plate layer 70 is a glass cover plate, and the cover plate layer 70 is formed on the optical adjustment layer 60 by a bonding process.
Accordingly, an embodiment of the present application further provides a display device, including the display panel 100 as described in any one of the above. The Display device is mainly applied to Liquid Crystal Displays (LCDs), Plasma Displays (PDPs) and active matrix organic electroluminescent Display panels, and has wide application space in vehicle-mounted, mobile phone, flat Panel, computer and television products.
The embodiment of the application provides a display panel and a display device, the display panel replaces a polarizer by arranging an optical adjusting layer between a touch layer and a cover plate layer, wherein the optical adjusting layer comprises a black matrix and a plurality of dimming units, the black matrix comprises a plurality of first openings, at least one dimming unit is arranged in one first opening, emergent light of the display panel is led out through the dimming unit, the refractive index of one side, close to a substrate, of the dimming unit is smaller than the refractive index of one side, far away from the substrate, of the dimming unit, meanwhile, the dimming unit is provided with two high-light-transmitting materials with different refractive indexes, so that the external incident light is totally reflected at the interface between the two high-light-transmitting materials with different refractive indexes and is absorbed by the black matrices on two adjacent sides of the adjusting unit, the luminous flux of the ambient light entering the display panel is reduced, and the contrast of the display panel is improved, the light extraction efficiency of the display panel is further improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The display panel and the display device provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein by applying specific examples, and the description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A display panel is characterized by comprising a substrate and an optical adjusting layer arranged on the substrate, wherein the optical adjusting layer comprises a black matrix and a plurality of dimming units, the black matrix comprises a plurality of first openings, and at least one dimming unit is arranged in one first opening;
the emergent light of the display panel is guided out through the dimming unit, and the dimming unit is close to the refractive index of one side of the substrate and is smaller than the refractive index of one side of the substrate far away from the dimming unit.
2. The display panel according to claim 1, wherein the dimming cell comprises a first light-transmitting layer and a second light-transmitting layer located over the first light-transmitting layer, the second light-transmitting layer being disposed away from the substrate;
wherein the refractive index of the first light-transmitting layer is less than the refractive index of the second light-transmitting layer.
3. The display panel according to claim 2, wherein a surface of the first light-transmitting layer on a side away from the substrate is provided with at least one first protrusion, and a side of the second light-transmitting layer close to the first light-transmitting layer is provided with a first groove corresponding to the first protrusion.
4. The display panel according to claim 3, wherein a surface of the second light-transmitting layer on a side away from the first light-transmitting layer is on the same plane as a surface of the black matrix on a side away from the substrate.
5. The display panel according to claim 3, wherein at least one second protrusion is disposed on a surface of the second light-transmitting layer away from the substrate, and each first protrusion is disposed corresponding to at least one second protrusion.
6. The display panel according to claim 5, wherein the arc of the first protrusion is not equal to the arc of the second protrusion.
7. The display panel according to claim 1, wherein the refractive index of the dimming cell gradually increases along a light transmission direction of the display panel.
8. The display panel of claim 1, wherein the optically modifying layer has a thickness in a range from 2 microns to 4 microns.
9. The display panel according to any one of claims 1 to 8, characterized by further comprising:
the array structure layer is positioned on the substrate;
the light emitting functional layer is positioned on the array structure layer and comprises a plurality of light emitting devices, one light emitting device corresponds to one first opening, and emergent light emitted by the light emitting device is led out of the display panel through the first opening;
the thin film packaging layer is positioned on the light-emitting functional layer;
the touch layer is positioned on the thin film packaging layer; and
a cover plate layer;
wherein the optical adjusting layer is located between the touch layer and the cover plate layer.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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