CN215815938U - Display module and display device - Google Patents
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- CN215815938U CN215815938U CN202121328627.1U CN202121328627U CN215815938U CN 215815938 U CN215815938 U CN 215815938U CN 202121328627 U CN202121328627 U CN 202121328627U CN 215815938 U CN215815938 U CN 215815938U
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Abstract
The utility model relates to the technical field of display equipment, in particular to a display module and a display device comprising the display module. The display module comprises a substrate, a first array layer and a buffer layer, wherein the substrate, the first array layer and the buffer layer are sequentially stacked, a light emitting device and a pixel driving circuit are arranged on one side, away from the substrate, of the buffer layer, a plurality of first conical bulges facing the substrate are distributed on the first array layer in an array mode, and the first array layer is used for collecting light rays of the light emitting device, wherein the light rays are emitted to the substrate. The first array layer with the conical protruding structure array is manufactured above the substrate of the display module, light emitted by the transparent electrode of the light-emitting device can be collected in the first array layer, light entering the substrate has higher collimation degree, the quantity of light totally reflected inside the substrate is reduced, the effect of improving light efficiency is achieved, and the structure also has a certain peep-proof effect due to the fact that the first array layer can collect the light.
Description
Technical Field
The utility model relates to the technical field of display equipment, in particular to a display module and a display device comprising the display module.
Background
An Organic light-emitting diode (OLED) is a display device necessary for a high-end flagship mobile phone at present, and has the advantages of being rich in color, light and thin in weight, low in power consumption and the like. However, since the OLED has a low light efficiency utilization ratio (about 20%) and does not have a peep-proof function, it is necessary to improve the existing module structure to improve the light efficiency.
SUMMERY OF THE UTILITY MODEL
In view of this, embodiments of the present invention provide a display module and a display device including the same, so as to solve the technical problem of low light efficiency utilization rate of the structural design of the display module in the prior art.
In order to achieve the above object, according to an aspect of an embodiment of the present invention, a display module is provided.
The display module comprises a substrate, a first array layer and a buffer layer which are sequentially stacked, wherein a light emitting device and a pixel driving circuit are arranged on one side, away from the substrate, of the buffer layer, a plurality of first conical bulges facing the substrate are distributed on the first array layer in an array mode, and the first array layer is used for gathering light rays emitted by the light emitting device to the substrate.
In the display module provided by the embodiment of the utility model, a second array layer is arranged on one side of the substrate, which is far away from the buffer layer, and a plurality of second conical bulges, which are far away from the substrate, are distributed on the second array layer in an array manner.
In the display module provided by the embodiment of the utility model, the first array layer and/or the second array layer is made of silicon nitride, silicon dioxide or PET.
In the display module provided by the embodiment of the utility model, the first conical protrusion and/or the second conical protrusion are/is in the shape of a rectangular pyramid, a cone or a triangular pyramid.
In the display module provided by the embodiment of the utility model, the display module further comprises a pixel defining layer, the pixel defining layer is provided with a pixel opening in a region corresponding to the light emitting device, the light emitting device is arranged in the pixel opening, and the light emitting device comprises an anode, a cathode and an organic light emitting layer positioned between the anode and the cathode.
In the display module provided in the embodiment of the present invention, the pixel defining layer and the light path refracting layer are sequentially disposed on the periphery of the organic light emitting layer, the refractive index of the light path refracting layer is greater than that of the pixel defining layer, a first interface is formed between the pixel defining layer and the light path refracting layer, and the first interface is obliquely disposed and gradually approaches the light emitting device in a direction away from the substrate.
In the display module provided in the embodiment of the present invention, the pixel defining layer and the light path reflecting layer are sequentially disposed on the periphery of the organic light emitting layer, a second interface is formed between the pixel defining layer and the light path reflecting layer, and the second interface is obliquely disposed and gradually separated from the light emitting device in a direction away from the substrate.
In the display module provided by the embodiment of the utility model, the light path reflecting layer is made of metal.
In the display module provided in the embodiment of the present invention, a plurality of first blue light prevention layers and second blue light prevention layers alternately arranged are disposed between the substrate and the first array layer, and the first blue light prevention layers and the second blue light prevention layers are both made of a light-transmitting material and have different refractive indexes.
In the display module provided by the embodiment of the utility model, the first blue light prevention layer is made of silicon nitride, and the second blue light prevention layer is made of silicon dioxide.
In the display module provided by the embodiment of the utility model, the buffer layer is sequentially provided with the gate insulating layer, the interlayer dielectric layer and the planarization layer in a laminated manner on the side away from the substrate, and the pixel defining layer and the light emitting device are both arranged on the surface of the planarization layer away from the substrate.
In order to achieve the above object, according to a second aspect of the embodiments of the present invention, there is also provided a display device including the display module according to the first aspect of the embodiments of the present invention.
In the display module and the display device provided by the embodiment of the utility model, the first array layer with the conical protruding structure array is manufactured above the substrate of the display module, and the first array layer can collect the light emitted by the transparent electrode of the light-emitting device, so that the light entering the substrate has higher collimation degree, the quantity of the light totally reflected inside the substrate is reduced, and the effect of improving the light efficiency is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the utility model and do not limit it. In the drawings:
FIG. 1 is a cross-sectional view of a display module according to the related art;
fig. 2 is a first cross-sectional view of a display module according to an embodiment of the utility model;
fig. 3 is a second cross-sectional view of the display module according to the embodiment of the utility model;
fig. 4 is a third cross-sectional view of the display module according to the embodiment of the utility model;
FIG. 5 is a schematic diagram of the light path emitted from the substrate of the display module shown in FIG. 3;
FIG. 6 is a schematic diagram of the light path emitted from the substrate of the display module shown in FIG. 3;
fig. 7 is a fourth cross-sectional view of the display module according to the embodiment of the utility model;
FIG. 8 is a schematic diagram of blue light prevention in the display module shown in FIG. 7;
fig. 9 is a fifth cross-sectional view of a display module according to an embodiment of the utility model;
fig. 10 is a first cross-sectional view of a light emitting device portion of a display module according to an embodiment of the present invention;
FIG. 11 is a top view of the display module of FIG. 10;
fig. 12 is a second cross-sectional view of a light emitting device portion of a display module according to an embodiment of the present invention;
FIG. 13 is a top view of the display module of FIG. 12;
fig. 14 is a third cross-sectional view of a light emitting device portion of a display module according to an embodiment of the present invention; and
fig. 15 is a top view of the display module of fig. 14.
In the figure:
1. a substrate; 2. a first array layer; 201. a first tapered protrusion; 3. a buffer layer; 4. a light emitting device; 401. an anode; 402. a cathode; 403. an organic light emitting layer; 5. a second array layer; 501. a second conical projection; 6. a pixel defining layer; 7. a planarization layer; 8. an optical path refracting layer; 9. a first interface surface; 10. an optical path reflecting layer; 11. a second interface surface; 12. a first blue-light preventing layer; 13. a second blue-light preventing layer; 14. a gate insulating layer 15, an interlayer dielectric layer; 16. A semiconductor layer; 17. a source region; 18. a drain region; 19. a gate electrode; 20. a source electrode; 21. and a drain electrode.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, 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 partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the above-described drawings are intended to cover non-exclusive inclusions, such that a system, product or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
In this application, the terms "upper", "lower", "inner", "middle", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Fig. 1 is a schematic cross-sectional view of a conventional AMOLED display module structure, which sequentially includes a substrate 1, a buffer layer 3, a gate insulating layer 14, an interlayer dielectric layer 15, a planarization layer 7, and a pixel definition layer 6.
As shown in fig. 2, the display module according to the first aspect of the embodiment of the present invention includes a substrate 1, a first array layer 2, and a buffer layer 3, which are sequentially stacked, wherein a light emitting device 4 and a pixel driving circuit are disposed on a side of the buffer layer 3 away from the substrate 1, a plurality of first conical protrusions 201 facing the substrate 1 are distributed on the first array layer 2 in an array manner, and the first array layer 2 is used for collecting light emitted from the light emitting device 4 to the substrate 1. In the display module and the display device provided by the embodiment of the utility model, the first array layer 2 with the conical protruding structure array is manufactured above the substrate 1 of the display module, and the first array layer 2 can collect light emitted by the transparent electrode of the light-emitting device 4, so that the light entering the substrate 1 has higher collimation degree, the quantity of light totally reflected inside the substrate 1 is reduced, and the effect of improving the light efficiency is achieved.
In the above embodiments, the substrate 1 is made of a light-transmitting material, which includes, but is not limited to, polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), quartz, UV resin, Polycarbonate (PC), and Polydimethylsiloxane (PDMS).
In the first array layer 2 of the embodiment of the present invention, the material of the first array layer 2 includes, but is not limited to, silicon nitride, silicon dioxide, or PET. The specific size parameters of the first pyramidal protrusions 201 may be specifically adjusted according to the type of the light emitting device 4 and the thickness of the buffer layer 3, so as to achieve the effect of collecting the light emitted from the buffer layer 3, for example, the widest part of the first pyramidal protrusions 201 has a width of 50-800nm and a height of 100-500nm, and the period of the array structure formed by the first pyramidal protrusions 201 may be 50-1000nm, where the period of the array structure is understood as the minimum distance between two adjacent first pyramidal protrusions 201. In the first array layer 2 provided in the above-described embodiment of the present invention, the shape of the first pyramidal protrusions 201 includes, but is not limited to, a rectangular pyramid, a cone, or a triangular pyramid. Specifically, when the first conical protrusions 201 are in a rectangular pyramid structure, the longer diagonal line in the bottom surface of the rectangular pyramid is the width of the first conical protrusions 201, and the height of the rectangular pyramid is the height of the first conical protrusions 201; when the first tapered protrusion 201 is a cone structure, the diameter of the bottom surface of the cone is the width of the first tapered protrusion 201, and the height of the cone is the height of the first tapered protrusion 201; when the first pyramidal protrusion 201 has a triangular pyramid structure, the longest side length of the bottom surface of the triangular pyramid is the width of the first pyramidal protrusion 201, and the height of the triangular pyramid is the height of the first pyramidal protrusion 201.
As shown in fig. 3 and 4, in some embodiments, a second array layer 5 is disposed on a side of the substrate 1 facing away from the buffer layer 3 in the display module, and a plurality of second cone-shaped protrusions 501 facing away from the substrate 1 are distributed in an array on the second array layer 5. The design of the second array layer 5 can refer to the first array layer 2, and the design of the second cone-shaped protrusion 501 can refer to the first cone-shaped protrusion 201, that is, the material of the second array layer 5 includes but is not limited to silicon nitride, silicon dioxide or PET; the shape of the second tapered protrusion 501 includes, but is not limited to, a rectangular pyramid, a cone, or a triangular pyramid. The structure array of the second array layer 5 manufactured on the surface of the substrate 1 of the display module can scatter light totally reflected inside the substrate 1, so that more light is emitted from the substrate 1, and the effect of enhancing light efficiency is achieved. In the display module, the substrate is thicker than other film layers, so that a large amount of light is totally reflected inside the substrate, and the totally reflected light is scattered by the second array layer 5, which is the reason that the second array layer has a similar structure to the first array layer but has a different action principle on the light.
FIG. 5 shows a conventional planar structured substrate 1, light is reflected and refracted when it exits from the substrate 1 into the air, and the incident angle and the refraction angle conform to the law of refraction, i.e., n1sinβ＝n0sin beta', where n is0、n1Respectively, the refractive index of air and the refractive index of the substrate 1, beta being the angle of incidence and beta' being the angle of refraction. As the incident angle increases, the refraction angle β' increases, and when the refraction angle is 90 °, the incident angle β becomes arcsin (n)0/n1) At a critical angle, generally θcShowing, namely showing the light path (c) in the figure; when 0 is present<β<θcIn the process, the light can normally emit out of the substrate 1, namely as shown by a light path II in the figure; when theta isc<β<At 90 deg., the light is totally reflected inside the substrate 1 and can not normally exit to the air, i.e. as shown by the light path (r) in the figure. That is, the incident angle is greater than θcThe light is lost, and the light efficiency utilization rate is poor.
Fig. 6 shows the substrate 1 provided with the second array layer 5 according to the embodiment of the present invention, where the slope angle of the second conical protrusion 501 is α, when light passes through the surface of the second conical protrusion 501, the light emitting condition is as follows: the incident angle beta satisfies 0<β<θcWhen the light is emitted out of the substrate 1, the light path is shown as the first light path in the figure; the incident angle beta satisfies the theta c<β<At 90 deg., the light is reflected on one second conic projection 501 surface and reflected to the adjacent second conic projection 501 surface, and the relative incident angle is beta2Then β2When (2 α - θ) |2 α - β |c)<β<2 alpha or 2 alpha<β<(2α+θc) In the process, light rays are also directly emitted, namely, as shown by a light path II in the figure; in addition, there is a light path in the figure, after the light is reflected on the surface of the second conical protrusion 501 on the substrate 1, the light is reflected to the surface of the adjacent second conical protrusion 501 and reflected to the inside of the substrate 1 again, and the light of the part is usually very little.
According to the above analysis, when the surface of the substrate 1 is the second array layer 5, most of the light can be emitted into the air, and only a small portion of the light cannot be emitted due to the double reflection on the surface of the second conical protrusion 501, so the second array layer 5 is disposed to make the display module have higher light emitting efficiency, preferably, the refractive index of the second array layer 5 is the same as that of the substrate 1, so that the light is not refracted when the substrate 1 and the second array layer 5 are transited, the second array layer 5 can be formed by processing the surface of the substrate 1, and certainly, an independent second array layer 5 can be formed on the surface of the substrate 1 by deposition or sputtering, etc.
As shown in fig. 10 and 11, in the display module according to the embodiment of the present invention, the display module further includes a pixel defining layer 6, the pixel defining layer 6 is provided with a pixel opening in a region corresponding to the light emitting device 4, the light emitting device 4 is disposed in the pixel opening, and the light emitting device 4 includes an anode 401, a cathode 402, and an organic light emitting layer 403 between the anode 401 and the cathode. The bottom of the light emitting device 4 is generally designed with the planarization layer 7, so that the light emitted from the organic light emitting layer 403 above the planarization layer 403 propagates inside the organic layer due to the optical waveguide effect and enters the pixel defining layer 6 to horizontally propagate, and is not emitted to the outside, that is, there are two light paths (i.e., the light path) and the light path (iii) that need to be avoided as much as possible in the figure.
In order to improve the defects of the display module structure shown in fig. 10 and 11, as shown in fig. 12 and 13, in the display module provided in the embodiment of the present invention, the pixel defining layer 6 and the optical path refracting layer 8 are sequentially disposed on the periphery of the organic light emitting layer 403, the refractive index of the optical path refracting layer 8 is greater than that of the pixel defining layer 6, a first interface 9 is formed between the pixel defining layer 6 and the optical path refracting layer 8, and the first interface 9 is obliquely disposed and gradually approaches the light emitting device 4 in a direction away from the substrate. The structure makes a layer of transparent light path refraction layer 8 with a larger refractive index and an inverted trapezoid structure designed around the organic light emitting layer 403, on the premise of meeting the refractive index requirement, the material of the light path refraction layer 8 can be silicon nitride or silicon dioxide, by utilizing the characteristic that the refractive index of the structure is larger than the refractive index of the pixel defining layer 6, light rays (such as a light path and a light path in fig. 12) transversely transmitted in parallel with the organic light emitting layer 403 in the pixel defining layer 6 are refracted at the first interface 9, so that partial light rays (such as a light path and a light path fifth in fig. 12) are refracted out of the surface of the display module due to refraction, the purpose of improving the light efficiency is achieved, in addition, different improvement effects can be achieved by controlling the shape and the length of the gradient of the first interface 9, and the description is omitted here.
In order to improve the defects of the display module structure shown in fig. 10 and 11, as shown in fig. 14 and 15, in the display module provided in the embodiment of the present invention, the pixel defining layer 6 and the light path reflecting layer 10 are sequentially disposed on the periphery of the organic light emitting layer 403, a second interface 11 is formed between the pixel defining layer 6 and the light path reflecting layer 10, and the second interface 11 is obliquely disposed and gradually separated from the light emitting device 4 in a direction away from the substrate. By the structure, a light path reflection layer 10 with a light-tight trapezoid structure is designed on the periphery of the organic light-emitting layer 403, and light rays (such as a light path and a light path c in fig. 14) transversely transmitted in parallel with the organic light-emitting layer 403 in the pixel definition layer 6 are reflected at the second interface 11 by utilizing the characteristic that the light rays can form a large amount of reflection, so that part of the light rays (such as a light path c and a light path c in fig. 14) are emitted out of the surface of the display module due to reflection, and the purpose of improving the light efficiency is achieved, and different improvement effects can be achieved by controlling the shape and the length of the gradient of the second interface 11, and the description is omitted here. Wherein the material of the optical path reflection layer 10 includes, but is not limited to, metal.
As shown in fig. 7 and 8, in the display module according to the embodiment of the present invention, a plurality of first blue light prevention layers 12 and a plurality of second blue light prevention layers 13 are alternately disposed between the substrate and the first array layer 2, and the first blue light prevention layers 12 and the second blue light prevention layers 13 are made of a light-transmitting material and have different refractive indexes. The first blue light preventing layer 12 and the second blue light preventing layer 13 are alternately arranged in a plurality of layers, when light is transmitted from the light sparse to the optical dense medium, reflected light has half-wave loss, the phase difference between the reflected light and incident light is pi, and the reflectivity is larger than 4%. When light propagates from the optical density to the optical thinner medium, half-wave loss is not generated, but phase change of (2n-1) × pi can be generated after the light passes through the high-refractive-index film layer. The multilayer nano film layer structure enables phases of reflected light to be the same, interference can occur between the reflected light, reflectivity is increased, and therefore the purpose of weakening blue light intensity is achieved, and the blue light prevention effect is achieved.
With the increase of the number of the alternating layers of the high/low refractive index films, the transmittance is reduced, the reflectivity is increased, the wavelength of the high reflectivity tends to be a limit, and the corresponding waveband is called as a reflection bandwidth. The reflection bandwidth is calculated by the formula Δ g-2/π arcsin ((n)H-nL)/(nH+nL) Wherein n) isHAnd nLThe refractive index of the high refractive index film layer and the refractive index of the low refractive index film layer in the first blue light prevention layer 12 and the second blue light prevention layer 13, respectively; the larger nH/nL is, the larger the reflection bandwidth is, and the reflectivity of the non-blue light wavelength is relatively increased, so that both blue light prevention and transmittance should be considered in practical design. In an alternative embodiment, the first blue-light preventing layer 12 is made of silicon nitride, and the second blue-light preventing layer 13 is made of silicon dioxide.
In the display module provided by the embodiment of the utility model, the buffer layer 3 is sequentially provided with a gate insulating layer 14, an interlayer dielectric layer 15 and a planarization layer in a stacked manner on the side away from the substrate, and the pixel defining layer 6 and the light emitting device 4 are both arranged on the surface of the planarization layer away from the substrate.
Referring to the drawings, in a display module provided by an embodiment of the present invention, a pixel driving circuit on a substrate may include a plurality of transistor structures, and only one transistor structure is shown in each drawing for illustration. A buffer layer 3 is deposited on the whole surface of the substrate; according to circumstances, the buffer layer 3 may not be included; alternatively, the buffer layer 3 may have a plurality of layers. Here, for convenience of explanation, the buffer layer 3 provided in a single layer will be described as an example. Also, the second array layer 5, the first blue-light-preventing layer 12, and the second blue-light-preventing layer 13 mentioned in the foregoing embodiments of the present invention may be provided at desired regions between the buffer layer 3 and the substrate.
To briefly describe the pixel driving circuit, the display driving circuit has a structure of a semiconductor layer 16, a source region 17, a drain region 18, a gate electrode 19, and the like, the semiconductor layer 16 is disposed on the buffer layer 3, the semiconductor layer 16 includes a channel region of a transistor, the channel region is defined as an overlapping region between the gate electrode 19 and the semiconductor layer 16, a central portion of the semiconductor layer 16 is a channel region due to the overlapping of the gate electrode 19 and a central portion of the semiconductor layer 16, and two regions extending on both sides of the channel region are doped with impurities and are respectively defined as the source region 17 and the drain region 18. Semiconductor layer 16 preferably comprises a polycrystalline semiconductor material such as polysilicon (p-Si).
A gate insulating layer 14 is deposited on the entire surface of the buffer layer 3 having the semiconductor layer 16. The gate insulating layer 14 may be formed of a silicon nitride material or a silicon oxide material. In order to ensure the stability and characteristics of the device, the gate insulating layer 14 preferably has a certain thickness. In the case where the gate insulating layer 14 is formed of silicon nitride, a large amount of hydrogen particles may be contained in the gate insulating layer 14 in terms of the manufacturing process. These hydrogen particles may diffuse to the outside of the gate insulating layer 14, and thus the gate insulating layer 14 is preferably formed of a silicon oxide material. An interlayer insulating layer is deposited over the gate insulating layer 14 to cover the gate electrode 19. The interlayer insulating layer includes, but is not limited to, a multilayer structure in which nitride layers SIN including silicon nitride and oxide layers SIO including silicon oxide are alternately stacked. In order to facilitate the formation of the light emitting device 4 and the pixel defining layer 6, a planarization layer is covered over the interlayer insulating layer.
The first array layer, the second array layer, the light path refraction layer, the light path reflection layer, the blue light prevention layer and other structures in the above embodiments of the present invention may be combined and used, so as to integrate the peeping prevention and the blue light prevention, and improve the light efficiency, for example, the following provides a method for manufacturing a display module shown in fig. 9, and specifically may be:
step S100, preparing a first array layer 2 having first pyramidal protrusions 201;
step S200 of alternately arranging a first blue light prevention layer 12 and a second blue light prevention layer 13 on a substrate in sequence;
a step S300 of disposing a first array layer 2 over the alternately disposed first and second blue- proof layers 12 and 13;
step S400, depositing a buffer layer 3 on the first array layer 2.
Step S500, forming a pixel driving circuit on a side of the buffer layer 3 away from the substrate. Comprises the following steps
Step S510 is to deposit an amorphous silicon (a-Si) material on the buffer, and perform a crystallization process to convert the amorphous silicon layer into polycrystalline silicon (poly-Si). The polysilicon layer is patterned using a masking process to form the semiconductor layer 16.
In step S520, an insulating material is deposited on the entire surface of the buffer layer 3 having the conductor layer to form a gate insulating layer 14. The gate insulating layer 14 preferably comprises silicon oxide.
In step S530, a gate metal material is deposited on the gate insulating layer 14, and the gate metal layer is patterned using a mask process to form the gate electrode 19. The gate electrode 19 is provided to overlap with a central portion of the semiconductor layer 16.
In step S540, an impurity material is doped into portions of the semiconductor layer 16 using the gate electrode 19 as a mask to define doped regions including the source region 17 and the drain region 18.
In step S550, an interlayer dielectric layer 15 is deposited on the entire surface of the gate insulating layer 14 having the gate electrode 19.
In step S560, the interlayer dielectric layer 15 and the gate insulating layer 14 are patterned using a mask process to form a source contact hole exposing a portion of the semiconductor layer 16 and a drain contact hole exposing another portion of the semiconductor layer 16.
In step S570, a source-drain metal material is deposited on the interlayer dielectric layer 15 having the source contact hole and the drain contact hole, and the source-drain metal material is patterned using a mask process to form the source electrode 20 and the drain electrode 21. The source electrode 20 is in contact with the source region 17 through a source contact hole, and the drain electrode 21 is in contact with the drain region 18 through a drain contact hole.
In step S600, a passivation layer is deposited on the entire surface of the device structure where the pixel driving circuit is formed, and the passivation layer is patterned to form contact holes to expose portions of the drain electrodes 21.
Step S700, depositing a planarization layer on the surface of the passivation layer.
Step S800, forming the light emitting device 4 on the planarization layer, specifically including the following steps: preparing an anode 401 by one patterning; preparing an organic light emitting layer 403 by an evaporation process; preparing a cathode 402 by an evaporation process; preparing a pixel defining layer by a PEVCD process; the optical path refractive layer 8 is prepared by a PEVCD process or the optical path reflective layer 10 is prepared by a Sputter process.
Step S900, a second array layer 5 is formed on the surface of the substrate.
The above is an exemplary description and illustration of the display module according to the embodiments of the present invention, and other configurations of the display module and other operations of the manufacturing method thereof will be known to those skilled in the art, and will not be described in detail herein, and those skilled in the art can understand and apply the description of the prior art.
The embodiment of the utility model also provides a display device, which adopts the display module provided by the embodiment of the utility model, namely the display module in the display device comprises a substrate 1, a first array layer 2 and a buffer layer 3 which are sequentially stacked, wherein a light-emitting device 4 and a pixel driving circuit are arranged on one side of the buffer layer 3, which is far away from the substrate 1, a plurality of first conical bulges 201 facing the substrate 1 are distributed on the first array layer 2 in an array manner, and the first array layer 2 is used for gathering the light rays of the light-emitting device 4, which are emitted to the substrate 1.
The display device provided by the embodiment of the application can be as follows: any product or component with a display function, such as a liquid crystal panel, electronic paper, an Organic Light Emitting Diode (OLED) panel, an Active Matrix Organic Light Emitting Diode (AMOLED) panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a navigator. The display device disclosed in the embodiment of the present application includes the display module provided in the above embodiment, and therefore the display device having the display module also has all the above technical effects, which are not described in detail herein. Other configurations, principles and manufacturing methods of the display module and the display device will be known to those skilled in the art and will not be described in detail herein.
Some embodiments in this specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. The display module is characterized by comprising a substrate, a first array layer and a buffer layer which are sequentially stacked, wherein a light emitting device and a pixel driving circuit are arranged on one side, away from the substrate, of the buffer layer, a plurality of first conical bulges facing the substrate are distributed on the first array layer in an array mode, and the first array layer is used for gathering light rays emitted by the light emitting device to the substrate.
2. The display module according to claim 1, wherein a second array layer is disposed on a side of the substrate facing away from the buffer layer, and a plurality of second cone-shaped protrusions facing away from the substrate are distributed on the second array layer in an array manner.
3. The display module of claim 2, wherein the first array layer and/or the second array layer is made of silicon nitride, silicon dioxide or PET.
4. The display module according to claim 2 or 3, wherein the first pyramidal protrusion and/or the second pyramidal protrusion are/is in the shape of a rectangular pyramid, a cone or a triangular pyramid.
5. The display module according to claim 1, further comprising a pixel defining layer provided with pixel openings at regions corresponding to the light emitting devices, the light emitting devices being arranged within the pixel openings, the light emitting devices comprising an anode, a cathode and an organic light emitting layer between the anode and the cathode.
6. The display module according to claim 5, wherein the pixel defining layer and the light path refracting layer are sequentially disposed on the periphery of the organic light emitting layer, the refractive index of the light path refracting layer is greater than that of the pixel defining layer, a first interface is formed between the pixel defining layer and the light path refracting layer, and the first interface is obliquely disposed and gradually approaches the light emitting device in a direction away from the substrate.
7. The display module according to claim 5, wherein the pixel defining layer and the light path reflecting layer are sequentially disposed on the periphery of the organic light emitting layer, a second interface is formed between the pixel defining layer and the light path reflecting layer, and the second interface is obliquely disposed and gradually separated from the light emitting device in a direction away from the substrate.
8. The display module of claim 7, wherein the light path reflective layer is made of metal.
9. The display module of claim 1, wherein a plurality of first and second blue-light-proof layers are alternately disposed between the substrate and the first array layer, and the first and second blue-light-proof layers are made of a transparent material and have different refractive indexes.
10. The display module according to claim 9, wherein the first anti-blue layer is made of silicon nitride, and the second anti-blue layer is made of silicon dioxide.
11. The display module according to claim 10, wherein the buffer layer is provided with a gate insulating layer, an interlayer dielectric layer, and a planarization layer in this order on a side facing away from the substrate, and the pixel defining layer and the light emitting device are both provided on a surface of the planarization layer facing away from the substrate.
12. A display device comprising the display module according to any one of claims 1 to 11.
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| CN113241420A (en) * | 2021-06-15 | 2021-08-10 | 京东方科技集团股份有限公司 | Display module, preparation method of display module and display device |
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| CN113241420A (en) * | 2021-06-15 | 2021-08-10 | 京东方科技集团股份有限公司 | Display module, preparation method of display module and display device |
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