CN111697162B - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- CN111697162B CN111697162B CN202010606092.3A CN202010606092A CN111697162B CN 111697162 B CN111697162 B CN 111697162B CN 202010606092 A CN202010606092 A CN 202010606092A CN 111697162 B CN111697162 B CN 111697162B
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- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 103
- 238000013459 approach Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 115
- 238000005538 encapsulation Methods 0.000 claims description 41
- 238000004806 packaging method and process Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000012044 organic layer Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 12
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
-
- 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
- H10K50/844—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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a display panel, a preparation method thereof and a display device, relates to the technical field of display, and can reduce optical crosstalk generated between adjacent sub-pixels when a grating is introduced to improve light extraction efficiency. Comprising a substrate base plate, a plurality of light emitting devices and a grating layer. A plurality of light emitting devices disposed on the substrate base; the grating layer comprises a plurality of reflection gratings, each reflection grating is arranged between the substrate and one light-emitting device, the reflection grating comprises a first surface far away from the substrate, and the edge of the first surface consists of a first part and a second part; the first surface gradually approaches the substrate base plate from the first part of the edge to the center; the first surface is gradually closer to the substrate from the second portion of the rim to the center, or the first surface is parallel to the substrate from the second portion of the rim to the center.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.
Background
Self-luminous display devices, such as Organic Light-Emitting Diode (OLED) display panels, have the advantages of self-luminescence, light weight, low power consumption, good color rendition, sensitive response, wide viewing angle, etc., and have been increasingly used in display devices such as mobile phones, notebook computers, televisions, etc., and become the mainstream of the current market.
Disclosure of Invention
Embodiments of the present invention provide a display panel and a method of manufacturing the same, which can reduce optical crosstalk generated between adjacent sub-pixels when a grating is introduced to improve light extraction efficiency.
In order to achieve the above object, according to one aspect, the present invention provides a display panel, including: the light emitting device comprises a substrate base plate, a plurality of light emitting devices and a grating layer.
The plurality of light emitting devices are disposed on the substrate base.
The grating layer comprises a plurality of reflection gratings, each reflection grating is arranged between the substrate and one light emitting device, the reflection grating comprises a first surface far away from the substrate, and the edge of the first surface consists of a first part and a second part; the first surface gradually approaches the substrate base plate from the first part of the edge to the center; the first surface is gradually closer to the substrate from the second portion of the rim to the center, or the first surface is parallel to the substrate from the second portion of the rim to the center.
Optionally, the reflection grating includes a plurality of reflection patterns and slits between adjacent reflection patterns.
The display panel further includes: and a transparent conductive material filled in the slit.
Optionally, the reflection grating includes a second surface adjacent to the substrate, the second surface being parallel to the substrate.
Optionally, the pixel defining layer and the light reflecting structure are further included.
The light reflecting structure comprises a light reflecting side face and a bottom face adjacent to the light reflecting side face and close to the substrate, an included angle between the light reflecting side face and the bottom face is larger than 0 degree and smaller than 90 degrees, and the light reflecting side face and the light emitting device are oppositely arranged.
Wherein the pixel defining layer covers a light reflecting side of the light reflecting structure.
Optionally, the light reflecting structure includes: a plurality of light reflecting strips, wherein each light reflecting strip is arranged opposite to at least two light emitting devices; the longitudinal section of the reflecting strip is triangular or trapezoidal.
Optionally, when the longitudinal section of the light reflecting strip is a triangle, the triangle is an isosceles triangle, and the bottom side of the isosceles triangle is parallel to the substrate; when the longitudinal section of the reflecting strip is trapezoid, the trapezoid is isosceles trapezoid.
Optionally, the packaging structure further comprises a packaging layer; the packaging layer is arranged on one side of the light-emitting device, which is far away from the substrate base plate; the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are sequentially arranged on the light-emitting device; the refractive index of the second encapsulation layer is greater than the refractive index of the first encapsulation layer and the refractive index of the third encapsulation layer.
Optionally, the material of the first packaging layer and the third packaging layer is one of molybdenum trioxide, titanium dioxide and silicon nitride.
The second packaging layer is made of silicon dioxide.
Optionally, the color film substrate is also included; the color film substrate is arranged on one side of the light emitting device, which is far away from the substrate.
In another aspect, an embodiment of the present invention provides another display panel including a substrate, a plurality of light emitting devices, and an encapsulation layer.
The packaging layer is arranged on one side of the light-emitting device, which is far away from the substrate base plate; the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are sequentially arranged; the refractive index of the second encapsulation layer is greater than the refractive index of the first encapsulation layer and the refractive index of the third encapsulation layer.
Optionally, the light-emitting device further comprises a pixel defining layer and a light-reflecting structure, wherein the light-reflecting structure comprises a light-reflecting side surface and a bottom surface adjacent to the light-reflecting side surface and close to the substrate, an included angle between the light-reflecting side surface and the bottom surface is larger than 0 degree and smaller than 90 degrees, and the light-reflecting side surface and the light-emitting device are oppositely arranged.
Wherein the pixel defining layer covers a light reflecting side of the light reflecting structure.
In still another aspect, an embodiment of the present invention provides a display device including the above display panel.
In another aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including:
a substrate is provided.
A grating layer is formed on the substrate base plate using nanoimprinting.
A plurality of light emitting devices are formed on the substrate base plate provided with the grating layer.
The light emitting device comprises a substrate, a grating layer, a light emitting device and a light emitting diode, wherein the grating layer comprises a plurality of reflection gratings, each reflection grating is arranged between the substrate and the light emitting device, the reflection grating comprises a first surface far away from the substrate, and the edge of the first surface consists of a first part and a second part; the first surface gradually approaches the substrate base plate from the first part of the edge to the center; the first surface is gradually closer to the substrate from the second portion of the rim to the center, or the first surface is parallel to the substrate from the second portion of the rim to the center.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel provided in the related art;
fig. 2 is a cross-sectional view of a display panel provided in the related art;
fig. 3 is a cross-sectional view of another display panel provided in the related art;
FIG. 4 is a cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 5 is a perspective view of a reflection grating according to an embodiment of the present invention;
FIG. 6 is a perspective view of another reflection grating according to an embodiment of the present invention;
FIG. 7 is a perspective view of a reflection grating according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an optical path of a reflection grating according to an embodiment of the present invention;
fig. 9 is a schematic partial structure of a display panel according to an embodiment of the invention;
fig. 10 is a schematic view of a partial structure of another display panel according to an embodiment of the invention;
FIG. 11 is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view of still another display panel according to an embodiment of the present invention;
FIG. 13 is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 14 is a cross-sectional view of still another display panel according to an embodiment of the present invention;
FIG. 15 is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 16a is a cross-sectional view of yet another display panel according to an embodiment of the present invention;
FIG. 16b is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 17a is a cross-sectional view of yet another display panel according to an embodiment of the present invention;
FIG. 17b is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 18 is a cross-sectional view of still another display panel according to an embodiment of the present invention;
FIG. 19 is a cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 20 is a flowchart of another method for manufacturing a display panel according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the related art, as shown in fig. 1, a display panel is provided, which has an active area (AA area) and a peripheral area S, for example, disposed around the AA area. The AA region includes sub-pixels (sub-pixels) P of a plurality of colors. The plurality of color sub-pixels P include at least a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, and the first color, the second color, and the third color are three primary colors (e.g., red, green, and blue).
Fig. 1 illustrates an example in which the plurality of subpixels P are arranged in a matrix. In this case, the subpixels P arranged in a row in the horizontal direction X may be referred to as the same row of subpixels, and the same row of subpixels may be connected to one gate line. The subpixels P arranged in a row in the vertical direction Y may be referred to as the same column subpixels, and the same column subpixels may be connected to one data line.
The display panel is provided with a pixel driving circuit of the same structure and a light emitting device in each subpixel. As shown in fig. 2, the display panel includes a base substrate 10, and a light emitting device 20, an encapsulation layer 30, and a Color Filter (CF) 40 sequentially disposed on the base substrate 10. Wherein the pixel driving circuit is disposed in the substrate base 10, the color filter 40 includes a plurality of filter units 401 of a first color, a plurality of filter units 402 of a second color, and a plurality of filter units 403 of a third color. The light emitting device 20 emits white light, the light emitting device 20 and the first color filter unit 401 cooperate to form a first color sub-pixel, the light emitting device 20 and the second color filter unit 402 cooperate to form a second color sub-pixel, and the light emitting device 20 and the third color filter unit 403 cooperate to form a third color sub-pixel, so as to realize color display of the display panel. In the above-mentioned scheme, the white light emitted from the light emitting device 20 corresponding to the first color sub-pixel needs to pass through the encapsulation layer 30 in the process of reaching the color filter 40, and when the emission angle α is larger, the light will be emitted onto the adjacent second color filter unit 402 and/or third color filter unit 403, so as to affect the gray scale of the sub-pixel corresponding to the second color filter unit 402 and/or third color filter unit 403, and cause optical crosstalk between the adjacent sub-pixels.
As shown in fig. 2, the light emitting device 20 includes a first electrode 201, an organic layer 202, and a second electrode 203. For example, the first electrode 201 may be an anode and the second electrode 203 may be a cathode. Wherein the organic layer 202 is fabricated by using a luminescent material such as phosphorescence and thermally activated delayed fluorescence (Thermally Activated Delayed Fluorescence, TADF), the internal quantum efficiency of which is already close to 100%. But due to the difference in refractive index between the respective film layers inside the light emitting device 20, and the waveguide effect, the base effect, and the Surface Plasmon (SP) due to the metal-organic interface, etc., a large number of photons cannot be emitted outside the light emitting device 20 by confinement inside the light emitting device 20 to form light, so that the external quantum efficiency of the light emitting device 20 is lower than 30%.
Wherein in some embodiments the organic layer 202 comprises a light emitting layer. In other embodiments, the organic layer 202 includes one or more of an electron transport layer (election transporting layer, ETL), an electron injection layer (election injection layer, EIL), a hole transport layer (hole transporting layer, HTL), and a hole injection layer (hole injection layer, HIL) in addition to the light emitting layer.
In order to solve the above-mentioned problems, as shown in fig. 3, a grating layer 50 is provided between the light emitting device 20 and the substrate 10 in the related art, and photons confined inside the light emitting device 20 can be effectively extracted by providing the grating layer 50, thereby improving the external quantum efficiency of the light emitting device 20. However, due to the diffuse reflection of the grating layer 50, light generated by scattering emitted from the light emitting device 20 to the grating layer 50 is directly incident to the adjacent sub-pixels from the side of the light emitting device 20, so that optical crosstalk between the adjacent sub-pixels is more serious.
In order to solve the above-described problems, in one aspect, as shown in fig. 4, an embodiment of the present invention provides a display panel including a substrate base 10, a plurality of light emitting devices 20, and a grating layer 60.
The substrate base 10 includes a substrate, a plurality of thin film transistors (Thin Film Transistor, TFTs) disposed on the substrate, and a flat layer covering the plurality of TFTs, the plurality of thin film transistors constituting a corresponding pixel driving circuit for each sub-pixel, the pixel driving circuit including at least one driving TFT including a first electrode, a gate electrode, and a second electrode, one of the first electrode and the second electrode being electrically connected to the light emitting device 20 through a via hole on the flat layer.
A plurality of light emitting devices 20 are disposed on the substrate base 10. The plurality of light emitting devices 20 may be all or some of the light emitting devices provided in the display area of the display panel.
A grating layer 60; the grating layer 60 includes a plurality of reflection gratings 601, each reflection grating 601 being disposed between the substrate 10 and one of the light emitting devices 20, the reflection grating 601 including a first surface 601a remote from the substrate 10, an edge 6011 of the first surface 601a being composed of a first portion 6011a and a second portion 6011 b; in some embodiments, as shown in fig. 5, the first surface 6011a gradually approaches the substrate 10 from the first portion 6011a of the edge 6011 to the center O, and the first surface 6011a gradually approaches the substrate 10 from the second portion 6011b of the edge 6011 to the center O, that is, the edge 6011 of the first surface 601a approaches the substrate 10 from the center O, and at this time, the first surface 601a is a concave surface. Alternatively, as shown in fig. 6, in other embodiments, first surface 6011a gradually approaches substrate 10 from first portion 6011a of rim 6011 to center O, and first surface 601a is parallel to substrate 10 from second portion 6011b of rim 6011 to center O. The plurality of reflection gratings may be all or a part of the grating patterns between the substrate 10 and the plurality of light emitting devices 20.
The reflection grating is a grating in which the direction of the incident light and the direction of the outgoing light are on the same side of the grating. In some embodiments, the reflective grating is formed by scoring a series of grating patterns on a metal film; in other embodiments, the reflective grating is comprised of a series of grating patterns inscribed on a transparent glass and a thin metal film disposed on the side of the transparent glass remote from the plane of incidence of the incident light. In some embodiments, the material of the metal thin film may be a metal with high reflectivity, such as silver (Ag) or aluminum (Al). The reflection grating may be one of a one-dimensional grating, a two-dimensional grating, and a three-dimensional grating, and the reflection grating is exemplified as the one-dimensional grating in fig. 4 to 6.
As shown in fig. 5 and 6, the first surface 6011a gradually approaches the substrate 10 from the first portion 6011a of the rim 6011 to the center O, and the first surface 601a is parallel to the substrate 10 from the second portion 6011b of the rim 6011 to the center O. The first surface 601a of the reflection grating 601 reflects and converges light incident thereon, and the light emitted from the light emitting device 20 to the first surface 601a of the reflection grating 601 converges in a direction approaching to the substrate side of the curved surface, as shown in fig. 8, so that the light emitted from the light emitting device 20 can converge in the interior of the sub-pixel corresponding to the light emitting device 20, thereby improving optical crosstalk between adjacent sub-pixels.
Alternatively, as shown in fig. 7, when the first surface 601a of the reflection grating 601 is concave, the first surface 601a of the reflection grating 601 reflects and converges light incident thereon, and the light emitted from the light emitting device 20 to the first surface 601a of the reflection grating 601 converges toward the center of the concave, and a specific light path diagram is shown in fig. 8, so that the light emitted from the light emitting device 20 can converge inside the sub-pixel corresponding to the light emitting device 20, thereby improving optical crosstalk between adjacent sub-pixels.
Optionally, the reflection grating 601 includes a plurality of reflection patterns and slits between adjacent reflection patterns.
The display panel further includes: and a transparent conductive material filled in the slit. By way of example, the transparent conductive material may be Indium Tin Oxide (ITO).
On the basis of this, the driving TFT in the pixel driving circuit in the substrate base 10 may be electrically connected to the light emitting device 20 through the transparent conductive material, thereby achieving control of the light emitting device 20.
Alternatively, the reflective grating 601 includes a second surface 601b adjacent to the substrate 10, the second surface 601b being parallel to the substrate 10.
Optionally, as shown in fig. 11-15, the display panel further includes a pixel defining layer 70, and a light reflecting structure 80.
The light reflecting structure 80 includes a light reflecting side surface 80a and a bottom surface 80b adjacent to the light reflecting side surface 80a and close to the substrate 10, wherein an included angle β between the light reflecting side surface 80a and the bottom surface 80b is greater than 0 degrees and less than 90 degrees, and the light reflecting side surface 80a and the light emitting device 20 are disposed opposite to each other.
As shown in fig. 11 and 13, the pixel defining layer 70 covers the reflective side 80a of the reflective structure 80. Because the pixel defining layer 70 is mesh-shaped, and the light reflecting structure 80 corresponds to the pixel defining layer 70, as shown in fig. 10, the light reflecting structure 80 may be mesh-shaped.
The material of the light reflecting structure 80 is, for example, a metallic material.
As shown in fig. 9 and 10, the opposite arrangement of the light reflecting side surface 80a and the light emitting device 20 means that the light reflecting structure 80 includes a plurality of side surfaces, and among the plurality of side surfaces of the light reflecting structure 80, a side surface capable of reflecting the light emitted from the light emitting device 20 is the light reflecting side surface 80a. The side surfaces of the plurality of side surfaces except the light reflecting side surface 80a are not used for reflecting the light emitted from the light emitting device 20, and the included angle between the side surfaces and the bottom surface 80b is not limited in the embodiment of the present invention.
By providing the light reflecting structure 80, even if the light emitting angle α of the light emitted from the light emitting device 20 is larger, the light is reflected by the light reflecting structure 80 to the inside of the sub-pixel corresponding to the light emitting device 20, and is not emitted to the adjacent sub-pixel, so that optical crosstalk between the adjacent sub-pixels is further avoided.
Alternatively, as shown in fig. 11 to 15, the light reflecting structure 80 includes: a plurality of light reflecting stripes 801, each light reflecting stripe 801 being disposed opposite to at least two light emitting devices 20; the longitudinal section of the reflective strip 801 is triangular or trapezoidal.
As shown in fig. 11, when the longitudinal section of the reflective strip is triangular, the pixel defining layer 70 covers the side surface of the reflective strip, and the size of the pixel defining layer 70 may be larger than the size of the reflective strip along the thickness direction of the display panel, so that the pixel defining layer 70 completely covers the reflective strip, and thus, the pixel defining layer 70 can be directly made thicker, and the manufacturing process is simplified.
As shown in fig. 14 and 15, when the longitudinal section of the reflective strip is trapezoidal, the pixel defining layer 70 covers the side surface of the reflective structure 80, and may be in the thickness direction of the display panel, the size of the pixel defining layer 70 is equal to the size of the reflective strip, and when the reflective strip is made of a metal material and the second electrode of the light emitting device 20 is made of an integral layer, the reflective strip is overlapped with the second electrode, so that the sheet resistance of the second electrode can be reduced by making the reflective structure 80.
Alternatively, as shown in fig. 11 and 12, when the longitudinal section of the light reflecting strip is a triangle, the triangle is an isosceles triangle, and the base of the isosceles triangle is parallel to the substrate base plate 10; as shown in fig. 13 to 15, when the longitudinal section of the light reflecting strip is a trapezoid, the trapezoid is an isosceles trapezoid.
On the basis, the inclination angles of the reflective strips to the corresponding reflective sides of at least two light emitting devices 20 which are oppositely arranged are the same, and the reflection effects of the reflective strips on the light rays emitted by the at least two light emitting devices 20 are the same, so that the effects of reducing optical crosstalk to the sub-pixels corresponding to the at least two light emitting devices 20 are the same, and the phenomenon of uneven display of the display panel caused by the optical crosstalk is avoided.
Alternatively, as shown in fig. 16a and 16b, the display panel further includes an encapsulation layer 90, and the encapsulation layer 90 is disposed on a side of the light emitting device 20 away from the substrate 10; the encapsulation layer 90 includes a first encapsulation layer 901, a second encapsulation layer 902, and a third encapsulation layer 903 sequentially disposed on the light emitting device 20; the refractive index of the second encapsulation layer 902 is greater than the refractive index of the first encapsulation layer 901 and the refractive index of the third encapsulation layer 903.
When light rays are incident from a medium with a higher refractive index to a medium with a lower refractive index and the incident angle is larger than the total reflection angle, total reflection occurs at the interface where the two mediums are contacted. On this basis, when the light emitted from the light emitting device 20 is incident on the encapsulation layer 90 at a larger angle, since the refractive index of the second encapsulation layer 902 is greater than the refractive index of the first encapsulation layer 901 and the refractive index of the third encapsulation layer 903, the light propagates inside the second encapsulation layer 902, and does not exit to the outside of the encapsulation layer 90, further avoiding the light from exiting to the sub-pixel adjacent to the sub-pixel corresponding to the light emitting device 20, and reducing the occurrence of optical crosstalk between adjacent sub-pixels.
Optionally, the material of the first encapsulation layer 901 and the third encapsulation layer 903 is one of molybdenum trioxide, titanium dioxide and silicon nitride; the material of the second encapsulation layer 902 is silicon dioxide.
Optionally, as shown in fig. 17a and 17b, the display panel further includes a color film substrate 40, where the color film substrate 40 is disposed on a side of the light emitting device 20 away from the substrate 10.
In some embodiments, the color film substrate 40 includes a first color filter unit 401, a second color filter unit 402, and a third color filter unit 403 corresponding to the plurality of light emitting devices 20, the light emitting devices 20 emit white light, and color display is achieved by the light emitting devices 20 and the color film substrate 40 in cooperation. Meanwhile, when the light emitting device 20 emits white light, compared with the light emitting device 20 emitting colored light, the whole organic layer can be manufactured at one time by using the opening mask plate, so that the manufacturing process is simplified, and the cost is reduced.
On the other hand, as shown in fig. 18, an embodiment of the present invention provides a display panel including a substrate base 10, a plurality of light emitting devices 20, and an encapsulation layer 90. The encapsulation layer 90 includes a first encapsulation layer 901, a second encapsulation layer 902, and a third encapsulation layer 903 sequentially disposed on the light emitting device 20; the refractive index of the second encapsulation layer 902 is greater than the refractive index of the first encapsulation layer 901 and the refractive index of the third encapsulation layer 903.
The operation principle of the encapsulation layer 90 is the same as that described above, and will not be repeated here.
Optionally, as shown in fig. 19, the display panel further includes a pixel defining layer 70; and a light reflecting structure 80, wherein the light reflecting structure 80 comprises a light reflecting side surface 80a and a bottom surface 80b adjacent to the light reflecting side surface 80a and close to the substrate 10, an included angle between the light reflecting side surface 80a and the bottom surface 80b is greater than 0 degree and less than 90 degrees, and the light reflecting side surface 80a and the light emitting device 10 are oppositely arranged.
Wherein the pixel defining layer 70 covers the light reflective side 80a of the light reflective structure 80.
The operation principle of the light reflecting structure 80 is the same as that described above, and will not be described again here.
In still another aspect, an embodiment of the present invention provides a method for manufacturing a display panel, as shown in fig. 20, including:
s1, providing a substrate.
S2, forming a grating layer on the substrate by using nano imprinting.
S3, forming a plurality of light emitting devices on the substrate provided with the grating layer.
Wherein, as shown in fig. 4, the grating layer 60 includes a plurality of reflection gratings 601, each reflection grating 601 is disposed between the substrate 10 and one light emitting device 20, the reflection grating 601 includes a first surface 601a far from the substrate 10, and an edge 6011 of the first surface 601a is composed of a first portion 6011a and a second portion 6011 b; the first surface 601a gradually approaches the substrate 10 from the first portion 6011a of the edge 6011 to the center O; the first surface 601a is gradually closer to the substrate 10 from the second portion 6011b of the rim 6011 to the center O, or the first surface 601a is parallel to the substrate 10 from the second portion 6011b of the rim 6011 to the center O.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A display panel is characterized by comprising,
a substrate base;
a plurality of light emitting devices; the plurality of light emitting devices are arranged on the substrate base plate, and the light emitting devices comprise a first electrode, an organic layer and a second electrode;
a grating layer; the grating layer comprises a plurality of reflection gratings, each reflection grating is arranged between the substrate and one light emitting device, the reflection grating comprises a first surface far away from the substrate, and the edge of the first surface consists of a first part and a second part; the first surface gradually approaches the substrate base plate from the first part of the edge to the center; the first surface is gradually close to the substrate from the second part of the edge to the center, or the first surface is parallel to the substrate from the second part of the edge to the center;
the light reflecting structure is arranged on the substrate base plate and comprises a light reflecting side surface and a top surface far away from the substrate base plate; the light reflecting side surface is arranged opposite to the light emitting device;
a pixel defining layer covering a light reflecting side surface of the light reflecting structure and exposing a top surface of the light reflecting structure;
wherein the second electrode of the light emitting device is connected with the top surface of the light reflecting structure.
2. The display panel of claim 1, wherein the reflection grating includes a plurality of reflection patterns and slits between adjacent reflection patterns;
the display panel further includes: and a transparent conductive material filled in the slit.
3. The display panel of claim 1, wherein the reflective grating comprises a second surface proximate the substrate, the second surface being parallel to the substrate.
4. The display panel of claim 1, wherein the light reflecting structure further comprises a bottom surface adjacent to the light reflecting side surface and proximate to the substrate, the light reflecting side surface having an included angle with the bottom surface of greater than 0 degrees and less than 90 degrees.
5. The display panel of claim 4, wherein the light reflecting structure comprises: a plurality of light reflecting strips, wherein each light reflecting strip is arranged opposite to at least two light emitting devices; the longitudinal section of the reflecting strip is triangular or trapezoidal.
6. The display panel of claim 5, wherein the display panel comprises,
when the longitudinal section of the reflecting strip is triangular, the triangular is isosceles triangle, and the bottom side of the isosceles triangle is parallel to the substrate; when the longitudinal section of the reflecting strip is trapezoid, the trapezoid is isosceles trapezoid.
7. The display panel of claim 1, further comprising,
an encapsulation layer; the packaging layer is arranged on one side of the light-emitting device, which is far away from the substrate base plate; the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are sequentially arranged on the light-emitting device; the refractive index of the second encapsulation layer is greater than the refractive index of the first encapsulation layer and the refractive index of the third encapsulation layer.
8. The display panel according to claim 7, wherein a material of the first and third encapsulation layers is one of molybdenum trioxide, titanium dioxide, and silicon nitride;
the second packaging layer is made of silicon dioxide.
9. The display panel of claim 1, further comprising a color film substrate;
the color film substrate is arranged on one side of the light emitting device, which is far away from the substrate.
10. A display device comprising a display panel according to any one of claims 1-9.
11. A method for manufacturing a display panel, comprising:
providing a substrate base plate;
forming a light reflecting structure on the substrate, wherein the light reflecting structure comprises a light reflecting side surface and a top surface far away from the substrate;
forming a pixel defining layer covering a light reflecting side surface of the light reflecting structure and exposing a top surface of the light reflecting structure;
forming a grating layer on the substrate base plate using nanoimprinting;
forming a plurality of light emitting devices on the substrate base plate provided with the grating layer, wherein the light reflecting side surface is opposite to the light emitting devices; the light emitting device comprises a first electrode, an organic layer and a second electrode, wherein the second electrode is connected with the top surface of the light reflecting structure;
the light emitting device comprises a substrate, a grating layer, a light emitting device and a light emitting diode, wherein the grating layer comprises a plurality of reflection gratings, each reflection grating is arranged between the substrate and the light emitting device, the reflection grating comprises a first surface far away from the substrate, and the edge of the first surface consists of a first part and a second part; the first surface gradually approaches the substrate base plate from the first part of the edge to the center; the first surface is gradually closer to the substrate from the second portion of the rim to the center, or the first surface is parallel to the substrate from the second portion of the rim to the center.
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| CN112366221B (en) * | 2020-11-10 | 2024-05-24 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| CN112768494A (en) * | 2020-12-31 | 2021-05-07 | 安徽熙泰智能科技有限公司 | Metal mesh-based micro-display structure for improving crosstalk and preparation method thereof |
| CN112952025A (en) * | 2021-03-31 | 2021-06-11 | 京东方科技集团股份有限公司 | Display substrate and display device |
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| CN110085655A (en) * | 2019-05-30 | 2019-08-02 | 京东方科技集团股份有限公司 | Display panel and its manufacturing method, display device |
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| WO2016031679A1 (en) * | 2014-08-26 | 2016-03-03 | シャープ株式会社 | Organic electroluminesence apparatus, manufacutring method for same, illumination apparatus, and display apparatus |
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| CN1806270A (en) * | 2003-08-13 | 2006-07-19 | 东芝松下显示技术有限公司 | Optical device and organic el display |
| CN107170775A (en) * | 2017-04-12 | 2017-09-15 | 上海天马有机发光显示技术有限公司 | Using the display device of thin-film package |
| CN109037476A (en) * | 2018-07-26 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of display base plate and preparation method thereof, display device |
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