阅读说明：本技术 折光膜以及显示面板 (Light folding film and display panel ) 是由 邱晓华 万冲 秦凯 魏海燕 于 2021-07-21 设计创作，主要内容包括：本发明涉及一种折光膜以及显示面板。该折光膜包括光学胶层以及平坦层,平坦层具有多个通孔,光学胶层附着于平坦层的表面且填充平坦层的通孔,光学胶层的折射率大于平坦层的折射率。当将该折光膜应用到显示面板上时,可以对像素坑内发出的光的折射方向进行调整,降低光线的全反射率,使更多的光线发射到空气中,提高显示面板的出光率。另外,当将该折光膜应用到显示面板上时,可以通过通孔的位置设置,使平坦层的通孔与发光器件的像素坑的开口进行配合,使更多的光在预设的位置发射至空气中,进而对光线的出射方向进行控制,实现光线在预设位置的聚集或发散。(The invention relates to a refraction film and a display panel. The refraction film comprises an optical adhesive layer and a flat layer, wherein the flat layer is provided with a plurality of through holes, the optical adhesive layer is attached to the surface of the flat layer and fills the through holes of the flat layer, and the refractive index of the optical adhesive layer is greater than that of the flat layer. When the refraction film is applied to a display panel, the refraction direction of light emitted in the pixel pits can be adjusted, the total reflectivity of the light is reduced, more light is emitted to the air, and the light-emitting rate of the display panel is improved. In addition, when the refraction film is applied to a display panel, the through hole of the flat layer is matched with the opening of the pixel pit of the light-emitting device through the position arrangement of the through hole, so that more light is emitted to the air at a preset position, the emergent direction of the light is further controlled, and the light is gathered or diffused at the preset position.)

1. The refractive film is characterized by comprising an optical adhesive layer and a flat layer, wherein the flat layer is provided with a plurality of through holes, the optical adhesive layer is attached to the surface of the flat layer and fills the through holes, and the refractive index of the optical adhesive layer is greater than that of the flat layer.

2. The refractive film of claim 1, wherein one surface of said optical subbing layer and one surface of said flat layer are flush, and the thickness of said optical subbing layer is greater than the thickness of said flat layer.

3. The refractive film of claim 1, wherein said optical glue layer comprises an optical glue body and a filling medium, said filling medium being at least one of a zirconia filling medium and a titania filling medium.

4. The light-folding film according to claim 3, wherein the filling medium is 1 to 80% by mass based on the optical adhesive layer; and/or the presence of a gas in the gas,

the particle size of the filling medium is 5 nm-5000 nm.

5. The refractive film of claim 1, wherein the refractive index of said optical adhesive layer is 1.5 to 2.5; and/or the presence of a gas in the gas,

the refractive index of the flat layer is 1.0-1.6.

6. The refractive film of claim 1, wherein the thickness of said optical subbing layer is 10 μm to 100 μm; and/or the presence of a gas in the gas,

the thickness of the flat layer is 0.5-10 μm.

7. The refractive film according to any one of claims 1 to 6, further comprising a filter layer and a black matrix layer, both of which are located on a surface of the optical adhesive layer remote from the flat layer; the filter layer is arranged inside the black matrix layer; the filter layers are in one-to-one correspondence or staggered arrangement with the through holes of the flat layer.

8. The light-folding film according to claim 7, wherein a thickness of the filter layer and a thickness of the black matrix layer are equal; and/or the presence of a gas in the gas,

the thickness of the filter layer is 1-10 μm.

9. A display panel, which is characterized by comprising a light-emitting device and the refraction film as claimed in any one of claims 1 to 8, wherein the refraction film is covered on a light-emitting surface of the light-emitting device, and through holes of the flat layer and openings of pixel pits of the light-emitting device are in one-to-one correspondence or staggered arrangement.

10. The display panel of claim 9, wherein a surface of the optical glue layer is flush with a surface of the planarization layer, and wherein the optical glue layer has a thickness greater than a thickness of the planarization layer, the optical glue layer being further away from the light emitting device than the planarization layer.

Technical Field

The invention relates to the technical field of display, in particular to a refraction film and a display panel.

Background

With the development of display technology, light emitting diodes have been widely used in various types of display panels due to their wide viewing angle and thin profile. When the light emitting diode is applied to a display panel, a functional film layer is formed on the surface of the light emitting device to emit light. However, there are refraction and reflection phenomena in the light propagation process, and in the conventional display panel, there are many total reflection light rays, so that a considerable portion of the light rays cannot escape into the air, and the light-emitting rate of the display panel is low.

Disclosure of Invention

In view of the above, it is necessary to provide a refractive film capable of effectively improving the light extraction rate of a display panel, and a display panel including the refractive film.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a refraction film comprises an optical adhesive layer and a flat layer, wherein the flat layer is provided with a plurality of through holes, the optical adhesive layer is attached to the surface of the flat layer and fills the through holes, and the refractive index of the optical adhesive layer is greater than that of the flat layer.

In one embodiment, one surface of the optical adhesive layer is flush with one surface of the flat layer, and the thickness of the optical adhesive layer is larger than that of the flat layer.

In one embodiment, the optical adhesive layer comprises an optical adhesive main body and a filling medium, wherein the filling medium is at least one of a zirconium oxide filling medium and a titanium oxide filling medium.

In one embodiment, the mass percentage of the filling medium in the optical adhesive layer is 1-80%; and/or the presence of a gas in the gas,

the particle size of the filling medium is 5 nm-5000 nm.

In one embodiment, the refractive index of the optical adhesive layer is 1.5-2.5; and/or the presence of a gas in the gas,

the refractive index of the flat layer is 1.0-1.6.

In one embodiment, the thickness of the optical adhesive layer is 10-100 μm; and/or the presence of a gas in the gas,

the thickness of the flat layer is 0.5-10 μm.

In one embodiment, the light-folding film further comprises a light filter layer and a black matrix layer, wherein the light filter layer and the black matrix layer are both positioned on the surface of the optical adhesive layer far away from the flat layer; the filter layer is arranged inside the black matrix layer; the filter layers are in one-to-one correspondence or staggered arrangement with the through holes of the flat layer.

In one embodiment, the thickness of the filter layer is equal to the thickness of the black matrix layer; and/or the presence of a gas in the gas,

the thickness of the filter layer is 1-10 μm.

A display panel comprises a light emitting device and the refraction film in any embodiment, wherein the refraction film is covered on a light emitting surface of the light emitting device, and through holes of a flat layer and openings of pixel pits of the light emitting device are in one-to-one correspondence or staggered arrangement.

In one embodiment, one surface of the optical adhesive layer is flush with one surface of the flat layer, the thickness of the optical adhesive layer is greater than that of the flat layer, and the optical adhesive layer is farther away from the light-emitting device than the flat layer.

The refraction film comprises an optical adhesive layer and a flat layer, wherein the flat layer is provided with a plurality of through holes, the optical adhesive layer is attached to the surface of the flat layer and fills the through holes of the flat layer, and the refractive index of the optical adhesive layer is greater than that of the flat layer. In the refractive index film, a certain refractive index difference exists between the optical adhesive layer and the flat layer, and the refractive index of the optical adhesive layer is greater than that of the flat layer, so that the optical adhesive layer can form a micro-lens structure at the through hole of the flat layer. When the refraction film is applied to a display panel, the refraction direction of light emitted in the pixel pits can be adjusted, the total reflectivity of the light is reduced, more light is emitted to the air, and the light-emitting rate of the display panel is improved. In addition, when the refraction film is applied to a display panel, the through hole of the flat layer is matched with the opening of the pixel pit of the light-emitting device through the position arrangement of the through hole, so that more light is emitted to the air at a preset position, the emergent direction of the light is further controlled, and the light is gathered or diffused at the preset position.

Further, one surface of the optical adhesive layer is flush with one surface of the flat layer, and the thickness of the optical adhesive layer is larger than that of the flat layer. At this moment, the optical adhesive layer can well coat the flat layer, so that the propagation direction of light rays is further adjusted, and the light-emitting rate of the display panel is further improved.

Furthermore, the optical glue layer comprises an optical glue main body and a filling medium, wherein the filling medium is at least one of a zirconium oxide filling medium and a titanium oxide filling medium. At least one of the zirconia filling medium and the titania filling medium is matched with the optical adhesive main body to form the optical adhesive layer, so that the refractive index of the optical adhesive layer can be effectively improved. When the refraction film is applied to the display panel, the total reflection effect of light rays emitted by the light-emitting device can be effectively reduced, more light rays are emitted to the air, and the light-emitting rate of the display panel is improved.

Furthermore, the refraction film also comprises a filter layer and a black matrix layer, wherein the filter layer and the black matrix layer are both positioned on the surface of the optical adhesive layer far away from the flat layer, and the filter layer is arranged in the black matrix layer; the filter layers are in one-to-one correspondence or staggered arrangement with the through holes of the flat layer. Through the arrangement of the filter layer and the black matrix layer, the light extraction rate of the display panel can be effectively improved particularly when the external environment is strong light. The display panel can keep good display performance under the condition of strong light, and the use scene of the display panel is widened.

Drawings

FIG. 1 is a schematic structural diagram of a light folding film according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a light folding film according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a display panel including a refractive film corresponding to FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a display panel including a refractive film corresponding to FIG. 2 according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a light-emitting display panel according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a display panel and its light-emitting pattern in comparative example 5.

The notation in the figure is:

100. a light folding film; 101. an optical adhesive layer; 1011. an optical cement body; 1012. filling a medium; 102. a planarization layer; 1021. a through hole; 103. a filter layer; 1031. a red sub-filter layer; 1032. a blue sub-filter layer; 1033. a green sub-filter layer; 104. a black matrix layer; 200. a display panel; 201. a pixel defining layer; 2011. a red pixel pit; 2012. a blue pixel pit; 2013. a green pixel pit; 202. a packaging layer; 203. a touch layer; 204. a TFT layer; 300. a display panel; 301. a pixel defining layer; 3011. a red pixel pit; 3012. a blue pixel pit; 3013. a green pixel pit; 302. a packaging layer; 303. a touch layer; 304. a TFT layer; 305. a planarization layer; 400. light rays.

Detailed Description

The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1, an embodiment of the present invention provides a refractive film 100. The refractive film 100 comprises an optical adhesive layer 101 and a flat layer 102, wherein the flat layer 102 has a plurality of through holes 1021, the optical adhesive layer 101 is attached to the surface of the flat layer 102 and fills the through holes 1021, and the refractive index of the optical adhesive layer 101 is greater than that of the flat layer 102.

In the refractive film 100 of the present embodiment, a certain refractive index difference exists between the optical adhesive layer 101 and the flat layer 102, and the refractive index of the optical adhesive layer 101 is greater than that of the flat layer 102, so that the optical adhesive layer 101 forms a micro-lens structure at the through hole 1021 of the flat layer 102. When the refraction film 100 is applied to the display panel 200, the refraction direction of light emitted from the pixel pits can be adjusted, the total reflection rate of light is reduced, more light is emitted to the air, and the light-emitting rate of the display panel 200 is improved. In addition, when the refraction film 100 is applied to the display panel 200, the through holes 1021 of the flat layer 102 can be matched with the openings of the pixel pits of the light emitting device through the position arrangement of the through holes 1021, so that more light can be emitted to the air at a preset position, and further the emergent direction of the light can be controlled, and the light can be gathered or diffused at the preset position.

In a preferred example, one surface of optical glue layer 101 is flush with one surface of planarization layer 102, and the thickness of optical glue layer 101 is greater than the thickness of planarization layer 102. In this case, the optical adhesive layer 101 can favorably coat the flat layer 102, and further adjust the propagation direction of light, thereby further improving the light extraction rate of the display panel.

Specifically, the thickness of the optical adhesive layer 101 is 10 μm to 100 μm. The optical adhesive layer 101 has a thickness of 10 μm to 100 μm, and can achieve both a good refractive effect and an appropriate thickness. It is understood that the thickness of the optical glue layer 101 may be, but is not limited to, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, 32 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, 48 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, or 100 μm.

Further, the thickness of the planarization layer 102 is 0.5 μm to 10 μm. Alternatively, the thickness of the planarization layer 102 can be, but is not limited to, 0.5 μm, 0.8 μm, 1 μm, 1.2 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, or 10 μm. Preferably, the thickness of the planarization layer 102 is 1 μm to 5 μm. It will be appreciated that the flat layer 102 and the optical adhesive layer 101 are better adapted to facilitate the light gathering or scattering at the predetermined position by setting the appropriate thickness during the design process of the display panel.

In a specific example, the optical glue layer 101 includes an optical glue body 1011 and a filling medium 1012, and the filling medium 1012 is at least one of a zirconia filling medium and a titania filling medium. The optical adhesive layer 101 is formed by matching at least one of the zirconia filling medium and the titania filling medium with the optical adhesive main body 1011, so that the refractive index of the optical adhesive layer 101 can be effectively improved. When the refraction film 100 is applied to the display panel 200, the total reflection effect of the light emitted by the light emitting device can be effectively reduced, more light is emitted to the air, and the light emitting rate of the display panel is improved.

Specifically, the zirconia-filled medium is of Zr_xO_yAt least one compound of formula (la) wherein x: y is 1: (1-2). Alternatively, x: y may be, but is not limited to, 1:1, 1:1.2, 1:1.5, 1:1.8, or 1: 2. It is understood that the zirconia fill media may be of Zr_xO_yA mixture of any one or more of the compounds of formula (la). Preferably, x is 1. Further preferably, the zirconia-filled dielectric is ZrO₂And filling the medium.

In particular, titanium oxide filled dielectricsIs made of Ti_mO_nAt least one compound of formula (la) wherein m: n is 1: (1-2). Alternatively, m: n can be, but is not limited to, 1:1, 1:1.2, 1:1.5, 1:1.8, 1: 2. It is understood that the titanium oxide fill dielectric may be of Ti_mO_nA mixture of any one or more of the compounds of formula (la). Preferably, m is 1. Further preferably, the titanium oxide is TiO₂And filling the medium.

As an example of the amount of the filling medium 1012, the filling medium 1012 is 1% to 80% by mass in terms of the mass percentage of the optical adhesive layer 101. By matching the optical adhesive main body 1011 and the filling medium 1012, the mass percentage of the filling medium 1012 is controlled to be 1% -80%, and the filling medium 1012 is selected from at least one of a zirconia filling medium and a titania filling medium, so that the optical adhesive layer 101 with a high refractive index can be obtained under the conditions of material selection and proportion. The optical cement is applied to the display panel, so that the light-emitting rate of the display panel can be effectively improved. Preferably, the mass percentage of the filling medium 1012 in the optical adhesive layer 101 is 1% to 50%, more preferably, the mass percentage of the filling medium 1012 in the optical adhesive layer 101 is 3% to 50%, and even more preferably, the mass percentage of the filling medium 1012 in the optical adhesive layer 101 is 5% to 40%.

Alternatively, as a mass percentage of some of the filling media 1012, the mass percentage of the filling media 1012 may be, but is not limited to, 1%, 2%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 23%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% in terms of mass percentage of the optical glue layer 101.

In a specific example, the optical adhesive layer 101 is composed of an optical adhesive body 1011 and a filling medium 1012, the filling medium 1012 accounts for 1% to 80% by mass of the optical adhesive, and the filling medium 1012 is at least one of a zirconia filling medium and a titania filling medium. In this example, the optical adhesive layer 101 can be obtained only by the optical adhesive main body 1011 and the filling medium 1012, and the optical adhesive with a higher refractive index can be obtained, and the optical adhesive can be further applied to the display panel to effectively improve the light extraction rate of the display panel. Optionally, the mass fraction of the filling medium 1012 in the mass percentage of the optical adhesive layer 101 is 1% to 50%. Further, the mass fraction of the filling medium 1012 is 3% to 50% in terms of the mass percentage of the optical adhesive layer 101. Further, the mass fraction of the filling medium 1012 is 5% to 40% in terms of the mass percentage of the optical adhesive layer 101. Still further, the mass percentage of fill medium 1012 may be, but is not limited to, 1%, 2%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 23%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% by mass of optical glue layer 101.

In one particular example, the fill medium 1012 is a nanoparticle fill medium. Specifically, the particle size of the filling medium 1012 is 5nm to 5000 nm. Preferably, the particle size of the filling medium 1012 is 5nm to 3000 nm. More preferably, the particle size of the filling medium 1012 is 5nm to 1000 nm. More preferably, the particle size of the filling medium 1012 is 5nm to 100 nm. It is understood that the particle size of the fill media 1012 can be, but is not limited to, 5nm, 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, 70nm, 75nm, 80nm, 85nm, 90nm, 95nm, 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm, 500nm, 550nm, 600nm, 650nm, 700nm, 750nm, 800nm, 850nm, 900nm, 950nm, 1000nm, 1500nm, 2500nm, 3000nm, 3500nm, 4000nm, 4500nm, or 5000 nm.

In a specific example, as a method of manufacturing the above optical adhesive layer 101, it includes the steps of: the filling medium 1012 is uniformly mixed with the optical glue body 1011 and then cured. The filling medium 1012 and the optical adhesive body 1011 are uniformly mixed to obtain a preform, and then the preform is cured to obtain the optical adhesive layer 101. The preparation method is simple and feasible and is suitable for industrial popularization. It is understood that the particle size of the filling medium 1012 indicates the particle size of the filling medium 1012 before mixing with the optical glue body 1011.

In another specific example, as a method for manufacturing the above light folding film 100, the method includes the steps of: the optical adhesive layer 101 is formed by transferring the preform to the surface of the flat layer 102 and the through hole 1021, or the optical adhesive layer 101 formed by curing the preform is attached to the surface of the flat layer 102 and the through hole 1021. It is understood that the preform may be transferred to the surface of the planarization layer 102 to form the optical adhesive layer 101. The optical adhesive layer 101 may be formed on the optical adhesive layer 101, and then the formed optical adhesive layer 101 may be attached to the surface of the planarization layer 102 to fill the through hole 1021.

As a preferable example of the refractive index of the optical adhesive layer 101, the refractive index of the optical adhesive layer 101 is 1.5 to 2.5. The optical adhesive layer 101 can have a high refractive index by matching the filling medium 1012 with the optical adhesive main body 1011, and preferably, the refractive index of the optical adhesive layer 101 is 1.5-2.3. Alternatively, the refractive index of optical glue layer 101 may be, but is not limited to, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, or 2.5.

As a preferable example of the refractive index of the planarization layer 102, the refractive index of the planarization layer 102 is 1.0 to 1.6. Alternatively, the refractive index of the planarization layer 102 may be, but is not limited to, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, or 1.6. Preferably, the refractive index of the optical glue layer 101 is greater than the refractive index of the planarization layer 102, so that the planarization layer 102 and the optical glue layer 101 are better adapted to enable the light rays to be better concentrated or diverged at the preset positions.

Referring to fig. 2, in a preferred example, the refraction film 100 further includes a filter layer 103 and a black matrix layer 104(BM layer), and both the filter layer 103 and the black matrix layer 104 are located on the surface of the optical adhesive layer 101 away from the flat layer 102; the filter layer 103 is provided inside the black matrix layer 104; the filter layer 103 is disposed in one-to-one correspondence or offset with the through holes 1021 of the planarization layer 102. By the arrangement of the filter layer 103 and the black matrix layer 104, especially, the light extraction rate of the display panel when the external environment is strong light can be effectively improved. The display panel can keep good display performance under the condition of strong light, and the use scene of the display panel is widened.

It is understood that the filter layer 103 is divided into a red sub-filter layer 1031, a blue sub-filter layer 1032, and a green sub-filter layer 1033. Light emitted from the red pixel pit 2011, the blue pixel pit 2012, and the green pixel pit 2013 is filtered by the settings of the red sub-filter 1031, the blue sub-filter 1032, and the green sub-filter 1033, respectively.

It is also understood that the width of the filter layer 103 may be equal to the width of the via 1021 of the planarization layer 102, or the width of the filter layer 103 is smaller than the width of the via 1021 of the planarization layer 102, or the width of the filter layer 103 is larger than the width of the via 1021 of the planarization layer 102.

It is also understood that, in practical design, an appropriate width of the filter layer 103, an appropriate width of the black matrix layer 104, and an appropriate width of the opening of the planarization layer 102 may be designed according to design requirements to meet display requirements. Such as meeting the display requirements of adjacent pixel pits without light leakage.

It is also understood that the width of the pixel pit opening refers to the width of the end of the pixel pit opening close to the light exit surface. The width of the through hole 1021 refers to the width of the through hole 1021 at the surface of the flat layer 102 near the light emitting device. The width of the filter layer 103 refers to a width of the filter layer 103 near a surface of the light emitting device. Preferably, the width of via 1021 is greater than or equal to the width of the pixel pit opening. In the actual process, the width of the through hole 1021 is controlled to be greater than or equal to the width of the pixel pit opening, so that the pixel pit is completely exposed at the through hole 1021 corresponding to the pixel pit. Preferably, the width of the filter layer 103 is greater than or equal to the width of the pixel pit opening. In an actual process, the width of the filter layer 103 is controlled to be greater than or equal to the width of the opening of the pixel pit, so that the pixel pit is completely exposed at the filter layer 103 corresponding thereto. Further, the filter layers 103 correspond to the openings of the pixel pits one to one.

In a specific example, the thickness of the filter layer 103 and the thickness of the black matrix layer 104 are equal. Specifically, the thickness of the filter layer 103 is 1 μm to 10 μm. For example, the thickness of the filter layer 103 may be, but is not limited to, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, or 10 μm.

Through the setting of filter layer 103 and black matrix layer 104, can make display panel 200 have the basis of good display effect under the highlight condition, reduce display panel 200's thickness by a wide margin, simultaneously, can also effectively improve display panel 200's folding performance, the production of crease when avoiding folding can be applied to in the flexible display well.

Referring to fig. 3 and 4, a display panel 200 according to another embodiment of the present invention is provided. The display panel 200 includes a light emitting device and the refraction film 100 in any of the above embodiments or examples, the refraction film 100 covers the light emitting surface of the light emitting device, and the through holes 1021 of the flat layer 102 are in one-to-one correspondence with or staggered with the openings of the pixel pits of the light emitting device. Referring to fig. 3, fig. 3 shows the structure of the display panel 200 when the through hole 1021 of the planarization layer 102 corresponds to the opening of the pixel pit of the light emitting device. Referring to fig. 4, fig. 4 shows the structure of the display panel 200 when the through hole 1021 of the planarization layer 102 and the opening of the pixel pit of the light emitting device are disposed in a staggered manner. The light-emitting surface of the light-emitting device is covered with the light-folding film 100, and the through holes 1021 of the flat layer 102 are in one-to-one correspondence with or staggered with the openings of the pixel pits of the light-emitting device. Therefore, the light can be more conveniently controlled, and the light can be gathered or dispersed at the preset position.

It is understood that the light emitting device includes the pixel defining layer 201 and the pixel pits defined by the pixel defining layer 201. The pixel pits are divided into red pixel pit 2011, blue pixel pit 2012, and green pixel pit 2013. A light emitting layer is arranged in the pixel pit. Correspondingly, a red light emitting layer is provided in the red pixel pit 2011, a blue light emitting layer is provided in the blue pixel pit 2012, and a green light emitting layer is provided in the green pixel pit 2013. The opening of the pixel pit faces the light-emitting surface of the light-emitting device. In the display panel 200 of the embodiment, the refraction film 100 is disposed on the light emitting surface of the light emitting device, and the refraction film 100 covers the light emitting surface of the light emitting device, so that the refraction angle of light emitted by the light emitting device can be effectively improved, the ratio of light with total reflection is reduced, more light can be emitted into the air, and the light emitting rate of the display panel 200 is further improved. Further, through the one-to-one correspondence or dislocation arrangement of the through holes 1021 of the flat layer 102 and the openings of the pixel pits of the light emitting device, light can be conveniently controlled, and the light can be gathered or diffused at a preset position.

It will also be appreciated that the predetermined position may refer to a position where light needs to be concentrated, or may refer to a position where light needs to be dispersed. In the design process of the display panel 200, a predetermined position for light concentration and/or light divergence may be formed by the cooperation of the through hole 1021 and the pixel pit opening.

For example, via 1021 and the pixel pit opening correspond to each other. At this time, the positional relationship of the via 1021 and the pixel pit opening can be represented as shown in fig. 3. Under the condition, when the light emitted from the pixel pit escapes to the air at the through hole 1021, the light can be gathered at the through hole 1021, so that the light has higher light-emitting rate at the through hole 1021, the display effect at the through hole 1021 is improved, and the light-emitting rate at the position corresponding to the pixel pit on the display panel 200 is increased. At this time, the light emitting schematic diagram of the display panel 200 can be as shown in fig. 5. Specifically, after light emitted from red pixel pit 2011 passes through via 1021 and optical adhesive layer 101, light is collected to some extent at the position of via 1021, and the display effect of light emission from red pixel pit 2011 can be improved. After light emitted from blue pixel pit 2012 passes through hole 1021 and optical adhesive layer 101, light is collected to some extent at the position of hole 1021, and the display effect of light emission from blue pixel pit 2012 can be improved. Light emitted from green pixel pit 2013 passes through hole 1021 and optical adhesive layer 101, and is collected to some extent at the position of through hole 1021, so that the display effect of light emission from green pixel pit 2013 can be improved.

For another example, via 1021 and the pixel pit opening are offset. At this time, the positional relationship of the via 1021 and the pixel pit opening can be represented as shown in fig. 4. Under the condition, the light emitted by the pixel pits is further refracted after passing through the through holes 1021 and the optical adhesive layer 101, and the light rays which show the positions on the surface of the display panel 200 corresponding to the pixel pits have a certain divergence trend, so that the display effect of the light emission of the pixel pits can be adjusted.

It can be understood that, in the positional relationship between the through hole 1021 and the pixel pit opening, the through hole 1021 and the pixel pit opening may partially correspond to each other, or may correspond to each other one by one, so as to flexibly adjust the light converging and diverging positions. That is, when via hole 1021 and the pixel pit opening are provided, via hole 1021 and the pixel pit opening may be in one-to-one correspondence, or via hole 1021 and the pixel pit opening may be partially staggered in correspondence. Preferably, through holes 1021 and pixel pit openings correspond to each other one by one, or through holes 1021 and pixel pit openings are arranged in a staggered manner, and further through holes 1021 and pixel pit openings are arranged in a staggered manner one by one. That is, the through holes 1021 correspond to the openings of the pixel pits of the light emitting device one to one; or the via 1021 is offset from the opening of the pixel well of the light emitting device.

It is also understood that, in the structure of the display panel 200, the filter layers 103 correspond to the openings of the pixel pits one to one. Specifically, the red sub-filter 1031 corresponds to an opening of the red pixel pit 2011, the blue sub-filter 1032 corresponds to an opening of the blue pixel pit 2012, and the green sub-filter 1033 corresponds to an opening of the green pixel pit 2013. Further, the width of the filter layer 103 is larger than the width of the pixel pit opening.

In a preferred example, one surface of the optical adhesive layer 101 is flush with one surface of the planarization layer 102, and the thickness of the optical adhesive layer 101 is greater than that of the planarization layer 102, and the optical adhesive layer 101 is farther away from the light emitting device than the planarization layer 102. At this time, the surface of the optical adhesive layer 101 and the flat layer 102 is flush with the light emitting surface of the light emitting device.

Further, referring to fig. 3 or fig. 4 again, the display panel 200 further includes a packaging layer 202, the packaging layer 202 is located on the light emitting surface of the light emitting device, and the packaging layer 202 is closer to the light folding film 100 than the light emitting device.

Further, the display panel 200 further includes a touch layer 203, and the touch layer 203 is located between the light emitting device and the refractive film 100. Preferably, the touch layer 203 is located between the light folding film 100 and the encapsulation layer 202.

Further, the display panel 200 further includes a TFT layer 204, and the light emitting device is disposed on a surface of the TFT layer 204.

Yet another embodiment of the present invention provides a method for manufacturing a display panel 200. The manufacturing method of the display panel 200 includes the following steps: the light folding film 100 is attached to a light emitting surface of a light emitting device, wherein the through holes 1021 of the flat layer 102 and the openings of the pixel pits of the light emitting device are in one-to-one correspondence or are arranged in a staggered manner.

It is understood that the through hole 1021 of the planar layer 102 can be formed through the via hole 1021 on the planar layer 102 by a patterning method including steps of exposure, etching, and the like.

The following are specific examples.

Examples 1 to 5 and comparative examples 1 to 2

In the optical adhesive layers of examples 1 to 5 and comparative examples 1 to 2, the filling medium and the mass percentage thereof are shown in table 1, wherein the mass percentage is calculated by the mass percentage of the optical adhesive layer. The refractive index of the optical cement layer is shown in table 1. The particle size of the filling medium is 10 nm-50 nm.

TABLE 1

	Filling medium	Mass percent	Refractive index of optical adhesive layer
				Example 1	ZrO2	10％	1.54
Example 2	ZrO2	20％	1.58
				Example 3	ZrO2	40％	1.65
Example 4	TiO2	20％	1.60
				Example 5	TiO2	40％	1.67
Comparative example 1	ZrO2	0.5％	1.46
				Comparative example 2	TiO2	0.5％	1.48

As can be seen from Table 1, the optical pastes of examples 1 to 5 have higher refractive indexes than those of comparative examples 1 to 2. TiO 2₂Filling ratio ZrO₂The effect of filling on improving the refractive index is better, and is limited by the performance of the filling medium, TiO₂Filled optical cement ratio ZrO₂Transmission of filled optical cementThe excess is slightly lower.

Example 6

The structure of the display panel in this embodiment is shown in fig. 3, and the light-emitting schematic diagram is shown in fig. 5. The display panel comprises a light folding film, a touch layer, an encapsulation layer, a light emitting device with pixel pits and a TFT layer which are sequentially stacked. The pixel pits are divided into red pixel pits, blue pixel pits, and green pixel pits. The filter layer, the through holes of the flat layer and the pixel pit openings are in one-to-one correspondence.

Wherein, the optical adhesive layer is the optical adhesive layer in embodiment 3. The thickness of the filter layer is 5 μm, the thickness of the optical adhesive layer is 20-30 μm, the thickness of the flat layer is 5 μm, and the refractive index of the flat layer is 1.1. The width of the via hole is equal to the width of the opening of the pixel pit, and the width of the via hole is 40 μm. The width of the filter layer was 45 μm.

As can be seen from fig. 5, the light 400 is significantly refracted at the through hole, so that the light is concentrated at the through hole, which is represented by the concentration of the light at the area of the surface of the display panel corresponding to the pixel pits.

Comparative example 3

Comparative example 3 is different from example 6 in that the optical adhesive layer is the optical adhesive layer of comparative example 1.

Comparative example 4

Comparative example 4 differs from example 6 in that no filling medium is added to the optical glue layer.

Comparative example 5

The structure of the display panel 300 and the light extraction diagram thereof in this comparative example are shown in fig. 6. The display panel 300 includes a flat layer 305, a touch layer 303, an encapsulation layer 302, a light emitting device having a pixel pit, and a TFT layer 304, which are sequentially stacked. The light emitting device includes a pixel defining layer 301, and the pixel defining layer 301 defines a pixel pit. The pixel pits are divided into red pixel pits 3011, blue pixel pits 3012, and green pixel pits 3013. The planarization layer 302 has no vias.

The thickness of the planarization layer 302 is 5 μm, and the refractive index of the planarization layer 302 is 1.1. The width of the pixel pit opening was 40 μm.

As can be seen from fig. 6, the light 400 is not collected in the area corresponding to the pixel pits on the surface of the display panel 300, and there is a lot of light that is totally reflected and cannot exit into the air.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims, and the description and the drawings can be used for explaining the contents of the claims.