CN115308920A - Display panel, preparation method thereof and display device - Google Patents

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a light-emitting functional layer arranged on the substrate and a light ray control layer arranged on the light-emitting side of the light-emitting functional layer; the light emitting function layer includes a plurality of light emitting units, each of which includes at least one sub-pixel; the light ray control layer comprises a plurality of light ray control units; the light control unit comprises a light control interface formed by film layers with different refractive indexes; and the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for enabling the light rays emitted by the two adjacent light-emitting units correspondingly covered by the light control units to respectively propagate to the first area and the second area through the light control interface. By adopting the scheme of the invention, naked eye 3D display can be realized.

Description

Display panel, preparation method thereof and display device

Technical Field

The invention relates to a display panel, a preparation method thereof and a display device, and belongs to the technical field of display.

Background

With the continuous development of display technology, 3D display has become an important development trend in the display field, which can make the picture more vivid and give users a feeling of being personally on the scene. The 3D display mainly includes a glasses type (3D display is realized by glasses) and a naked eye type. Currently, the mainstream 3D display mode in the market is glasses type, but the naked-eye type 3D display is not mature, and for example, there are problems such as brightness reduction.

Disclosure of Invention

The invention provides a display panel, a preparation method thereof and a display device, and aims to solve the problem that a naked-eye type 3D display technology is not mature.

In a first aspect, an embodiment of the present invention provides a display panel, including;

a substrate;

a light emitting functional layer disposed on the substrate and including a plurality of light emitting cells; each of the light emitting units includes at least one sub-pixel;

the light ray control layer is arranged on the light emitting side of the light emitting function layer and comprises a plurality of light ray control units;

the light control unit comprises a light control interface formed by film layers with different refractive indexes; and the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for enabling the light rays emitted by the two adjacent light-emitting units correspondingly covered in the first direction to respectively propagate to the first area and the second area through the light control interface.

Based on the display panel, optionally, the light control unit includes a first refraction layer and a second refraction layer, and an interface between the first refraction layer and the second refraction layer is the light control interface;

the first refraction layer is arranged on the light emitting side of the light emitting functional layer, a strip-shaped groove extending along a second direction is formed in the side face, far away from the light emitting side, of the first refraction layer, and the second refraction layer is arranged in the strip-shaped groove; the refractive index of the first refraction layer is smaller than that of the second refraction layer; the second direction is perpendicular to the first direction.

Based on the above display panel, optionally, the light control interface is symmetrical about a mid-vertical plane of a connection line of the two adjacent light emitting units.

Based on the display panel, optionally, the shape of the cross section of the light control interface along the target plane is at least one arc or at least two line segments; wherein the target plane is a plane parallel to the first direction and perpendicular to the substrate.

Based on the above display panel, optionally, the light control layer further includes a light shielding unit disposed between adjacent light control units, and the light shielding unit is configured to absorb stray light.

Based on the display panel, optionally, the light emitting unit includes three light emitting units with different light emitting colors;

the light emitting colors of the two adjacent light emitting units correspondingly covered by each light ray control unit are the same, and the colors of the emergent light rays of every three adjacent light ray control units are different; alternatively, the light emitting color of each adjacent three of the light emitting units is different.

Based on the display panel, optionally, an orthographic projection of each light control unit on the substrate covers an orthographic projection of at least one light emitting unit on the substrate in the second direction.

In a second aspect, an embodiment of the present invention further provides a display device, which includes the display panel described in any one of the above.

In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, including:

forming a light emitting functional layer on a substrate; the light emitting function layer comprises a plurality of light emitting units, each of which comprises at least one sub-pixel;

forming a first refraction layer on the light-emitting side of the light-emitting functional layer by using a first material, and performing patterning treatment on the first refraction layer to form a plurality of strip-shaped grooves which are distributed along a first direction and extend along a second direction on the first refraction layer; wherein the first direction and the second direction are perpendicular;

filling each strip-shaped groove with a second material to form a second refraction layer in each strip-shaped groove; the refractive index of the first material is smaller than that of the second material, and the first refraction layer and the second refraction layer form a plurality of light ray control units; the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for transmitting light emitted by the two adjacent light-emitting units to the first area and the second area respectively.

Based on the above preparation method, optionally, before forming the first refractive layer on the light exit side of the light emitting functional layer by using the first material, the method further includes:

forming a plurality of light shielding units on the light emitting side of the light emitting functional layer;

the forming of the first refractive layer on the light-emitting side of the light-emitting functional layer by using the first material includes:

a first refractive layer is formed between adjacent ones of the light blocking units using a first material.

The invention provides a display panel, a preparation method thereof and a display device, wherein the display panel comprises a substrate, a light-emitting functional layer arranged on the substrate and a light ray control layer arranged on the light-emitting side of the light-emitting functional layer; the light emitting function layer includes a plurality of light emitting units, each of which includes at least one sub-pixel; the light control layer comprises a plurality of light control units; the light control unit comprises a light control interface formed by film layers with different refractive indexes; and the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for enabling the light emitted by the two adjacent light-emitting units correspondingly covered in the first direction to respectively propagate to the first area and the second area through the light control interface. So, set up the light control layer through the light-emitting side at luminous functional layer, can make the light that two adjacent luminescence units sent propagate to crossing first region and second region respectively, thereby through adjusting first region and second region, left eye and right eye when the observer are located first region and second region respectively, and the colour and/or luminance etc. of the light of first region and the regional light of second are different, the left eye and the right eye of observer can receive different light information, and then finally under display panel's a plurality of light control unit and luminescence unit's cooperation, make the left eye and the right eye of observer observe different images, realize 3D and show promptly.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. Moreover, the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic view of a structure of a light control layer of the display panel shown in FIG. 1;

FIG. 3 is a schematic view of another light control layer of the display panel shown in FIG. 1;

fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present invention;

FIG. 5 is a z-direction view of the display panel of FIG. 4;

fig. 6 is a schematic diagram of an arrangement of light emitting units according to an embodiment of the present invention;

fig. 7 is a schematic view of another arrangement of the light emitting units according to an embodiment of the present invention;

fig. 8 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the invention;

fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Description of reference numerals:

1-a substrate; 2-a light-emitting functional layer; 21-a light-emitting unit; 3-a light control layer; 31-a light control unit; 310-light control interface; 311-a first refractive layer; 312-a second refractive layer; 32-a light shielding unit; 4-packaging layer; 5-circuit array layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments and features of the embodiments described below can be combined with each other without conflict.

Summary of the application

3D imaging is produced by the visual difference of the two eyes of the human body. That is, in order to make a person see a 3D image, the left eye and the right eye of the person must see different images.

The mainstream 3D display scheme in the market at present is realized by means of 3D glasses, and the 3D glasses are required to be carried by a user in the mode, so that the use is inconvenient. In addition, some schemes capable of realizing naked eye 3D display exist at present, but many problems exist in the practical application process. Specifically, the current naked-eye 3D display technology mainly includes light barrier 3D technology, lenticular 3D technology, and directional light source 3D technology. The brightness and the resolution of the light barrier type 3D display image are reduced compared with the conventional 2D display image; the cylindrical lens needs to be additionally attached to the display screen for 3D display, so that the situation of attachment and non-alignment can occur, namely the requirement on the production process is higher; the directional light source 3D display reflects the pictures to the left eye and the right eye respectively in a parity frame staggered ordering mode, but at present, the method is mainly realized theoretically, and the actual technology is not mature.

In order to solve the problems, the invention provides a scheme for realizing naked eye 3D display based on a light ray control layer, which is simple in structure and easy to realize. The following non-limiting description of specific implementations is provided by way of a few examples or embodiments.

Exemplary display Panel

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a light control layer of the display panel shown in fig. 1. As shown in fig. 1, the display panel includes: the light emitting device comprises a substrate 1, a light emitting functional layer 2 arranged on the substrate 1 and a light ray control layer 3 arranged on the light emitting side of the light emitting functional layer 2; the light emission function layer 2 includes a plurality of light emitting cells 21, each light emitting cell 21 including at least one sub-pixel; the light control layer 3 comprises a plurality of light control units 31. The light control unit 31 includes a light control interface 310 formed by films with different refractive indexes; moreover, the orthographic projection of each light ray control unit 31 on the substrate 1 covers the orthographic projections of two adjacent light emitting units 21 on the substrate 1 in the first direction (refer to the x direction in fig. 1). As shown in fig. 2, the light control unit 31 is configured to make the light emitted by two adjacent light emitting units 21 correspondingly covered in the first direction propagate to the first region (refer to region a in fig. 2) and the second region (refer to region B in fig. 2), respectively. Wherein at least a part of the first area and the second area do not overlap, preferably, as shown in fig. 2, the first area and the second area do not overlap at all.

First, unless otherwise specified, a plurality means at least two in each example of the present invention. In addition, in each of the drawings other than fig. 1, lines with arrows indicate light propagation paths, and arrow directions indicate light propagation directions.

Further, the light emitting unit 21 refers to a light emitting unit 21 composed of at least one sub-pixel capable of emitting light of a specific color. For example, one red light emitting unit 21 may include only one red subpixel, or also be composed of two or more red subpixels. The plurality of light emitting cells 21 may be arranged in an array. The substrate 1 may be a rigid substrate 1 such as a glass substrate 1 or a silicon substrate 1, or may be a flexible substrate 1 such as Stainless Steel (SUS) or flexible Polyimide (PI). That is to say, the display panel in the embodiment of the present invention may be a rigid display panel that is not bendable, or may be a flexible display panel that is bendable.

Each of the sub-pixels includes at least an Anode (Anode), a Cathode (Cathode), and a light emitting structure layer between the Anode and the Cathode, so that the light emitting structure layer can emit light of a specific color according to a light emitting material included in the light emitting structure layer after a voltage is applied between the Anode and the Cathode. The light emitting structure Layer at least includes an Emission Layer (EML) for emitting light, and may further include one or more of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Injection Layer (EIL), an Electron Transport Layer (ETL), a Hole Blocking Layer (HBL), and an Electron Blocking Layer (EBL). In addition, the light emitting structure Layer may have a stacked structure, that is, a structure including at least two light emitting layers and a Charge Generation Layer (CGL) between adjacent light emitting layers.

After the light emitting units 21 emit light, if the light control layer 3 is not provided, a normal 2D display can be realized. After the light control layer 3 is disposed, since the light control unit 31 includes the light control interface 310 formed by film layers with different refractive indexes, light is refracted at the light control interface 310, and therefore, angles of light emitted by two light emitting units 21 (see fig. 1 and 2, that is, two light emitting units 21 below the light control unit 31) that are correspondingly covered by the light control unit 31 are changed by the light control interface 310, so as to finally propagate to the first region and the second region, respectively. Therefore, by adjusting the first area and the second area, when the left eye and the right eye of the observer are respectively located in the first area and the second area, and the color and/or the brightness of the light in the first area and the color and/or the brightness of the light in the second area are different, the left eye and the right eye of the observer can receive different light information, and finally, under the cooperation of the plurality of light control units 31 and the light emitting units 21 of the display panel, the left eye and the right eye of the observer observe different images, that is, the 3D display is realized.

Based on the above solution, in some embodiments, the light control interface 310 is symmetrical about a mid-vertical plane connecting two adjacent light emitting units 21.

Specifically, the connecting line of two adjacent light-emitting units 21 may be a connecting line of respective centers of the two adjacent light-emitting units 21, and the midperpendicular plane is a plane perpendicular to and bisecting the connecting line. When the light control interface 310 is symmetrical about the mid-vertical plane, the viewing angle direction when the observer observes the 3D display screen can be perpendicular to the substrate 1, which is convenient for the user to use actually; meanwhile, since the light control interface 310 is symmetrical about the above-mentioned mid-vertical plane, the light control unit 31 is also symmetrical about the mid-vertical plane in terms of structure, which also facilitates the implementation of the manufacturing process.

Of course, it is understood that, in other embodiments, the light control interface 310 may not be symmetrical with respect to a middle vertical plane of a connecting line between two adjacent light emitting units 21 correspondingly covered by the light control unit 31. In this case, 3D display can also be achieved by adjusting the actual viewing angle of the user and allowing the light rays of the first and second regions to enter the left and right eyes of the user, respectively.

The implementation principle of the solution of the present invention is explained above, and a specific structure capable of implementing the principle is explained below with reference to the accompanying drawings.

With continued reference to fig. 2, in some embodiments, the light control unit 31 includes a first refractive layer 311 and a second refractive layer 312; the interface between the first refractive layer 311 and the second refractive layer 312 is the light control interface 310; moreover, the first refractive layer 311 is disposed on the light exit side of the light emitting functional layer 2, and a side surface of the first refractive layer 311 away from the light exit side has a strip-shaped groove extending along a second direction (the second direction is not shown in fig. 2, and will be shown in subsequent figures); the second refraction layer 312 is arranged in the strip-shaped groove; the refractive index of the first refractive layer 311 is smaller than that of the second refractive layer 312, and the second direction is perpendicular to the first direction.

Specifically, the principle of the light ray control unit 31 described above for changing the light ray propagation angle is as follows: since the refractive index of the first refractive layer 311 is smaller than that of the second refractive layer 312, when the light passes through the interface (i.e. the light control interface 310) between the first refractive layer 311 and the second refractive layer 312, the refraction angle is smaller than the incident angle, and the light emitted from the light emitting unit 21 on the right side in fig. 2 is deflected to the left side. Meanwhile, due to the existence of the strip-shaped groove, it is equivalent to rotate the incident interfaces of the first refraction layer 311 and the second refraction layer 312, and as an example of the right light emitting unit 21 in fig. 2, the incident interface rotates counterclockwise by a certain angle, so that the refracted light is further deflected to the left. By the above principle, it is ensured that the final emergent light is still deflected to the required direction after the light is refracted again at the subsequent interface (for example, the light emitting unit 21 on the right side in fig. 2 is taken as an example, the light emitted by the light emitting unit is deflected to the left side).

Further, with continued reference to FIG. 2, the cross-section of the light control interface 310 along the target plane is shaped as an arc; wherein the target plane refers to a plane parallel to the first direction and perpendicular to the substrate 1. Specifically, as shown in fig. 2, directions of a large number of light rays (only 3 light rays are shown in fig. 2) emitted from the light emitting unit 21 are different (generally, the light emitting angle of the light emitting unit 21 is about 170 °), and thus, the light rays emitted from the light emitting unit 21 are incident on the interface between the first refractive layer 311 and the second refractive layer 312 in different directions as shown in fig. 2. Therefore, after being controlled by the light control unit 31, the light beams incident on the interface between the first refractive layer 311 and the second refractive layer 312 in different directions also propagate in different directions, and the maximum range that the light beams can reach constitutes the region a. Based on this, in this embodiment, the shape of the cross section of the light control interface 310 along the target plane is set to be an arc line, so that by adjusting the curvature of the arc line, more light rays emitted by the light emitting unit 21 can be adjusted to a required area by the light control unit 31, so as to improve the display brightness, and further improve the use experience of the user.

It will be appreciated that the cross-section of the light control interface 310 along the target plane may also be shaped as a combination of multiple arcs. In this way, the curvature of different arcs can be adjusted respectively, so that more light emitted by the light emitting unit 21 can be adjusted to a desired area by the light control unit 31.

In other embodiments, as shown in FIG. 3, the cross-section of the light control interface 310 along the target plane may also be shaped as a combination of two line segments. The refraction direction of the light can be adjusted by adjusting the slopes of the two line segments.

Of course, it is understood that the shape of the cross-section of the light control interface 310 along the target plane may also be a combination of three or more line segments, or a combination of at least one arc and at least one line segment, etc., as long as the corresponding purpose can be achieved, and is not limited thereto.

Further, referring to fig. 4, in some embodiments, the light control layer 3 further includes light shielding units 32 disposed between adjacent light control units 31, and the light shielding units 32 are used for absorbing stray light.

Specifically, as described above, the light emission angle of the light emitting unit 21 is generally around 170 °, so that a part of the light emitted by the light emitting unit 21 cannot be used for display in practice, and may affect the display effect. For example, light emitted from a certain light-emitting unit 21 may propagate to its neighboring light control unit 31, resulting in affecting the light-emitting color of the neighboring light control unit 31. Based on this, in the present embodiment, the light shielding unit 32 is provided between the adjacent light ray control units 31, thereby absorbing unnecessary stray light. The light shielding unit 32 may be a Black Matrix (BM).

Further, with continued reference to fig. 4, in some embodiments, the display panel may further include an encapsulation layer 4 disposed between the light emitting functional layer 2 and the light control layer 3. The encapsulating layer 4 can isolate water and oxygen, thereby protecting the structures such as the light emitting unit in the light emitting functional layer 2.

Further, with continued reference to fig. 4, in some embodiments, the display panel may further include a circuit array layer 5 disposed between the light emitting functional layer 2 and the substrate 1. The circuit array layer 5 includes a plurality of driving circuits each including a driving transistor having a drain electrically connected to an anode of the light emitting unit 21 to transmit a driving signal to the anode. It will be appreciated that the cathode of each light-emitting unit 21 is grounded or receives a low level signal so that there is a voltage difference between the anode and the cathode that drives the light-emitting layer to emit light.

The structure of the display panel is described above with reference to a cross-sectional view, and for easier understanding, the structure of the display panel is described below with reference to a top view of the display panel.

Referring to fig. 5, fig. 5 is a z-direction view of the display panel of fig. 4. As shown in fig. 5, the orthographic projection of each light control unit 31 on the substrate covers the orthographic projection of at least one light emitting unit 21 (4 in fig. 5) on the substrate in the second direction (see direction y in fig. 5). That is, in the second direction, one or more light emitting units 21 may be arranged. If at least two light-emitting units 21 are arranged in the second direction, the light-emitting units 21 may have the same or different emission colors, or may be partially the same.

In addition, in the actual control, all the light emitting units arranged in the second direction can be synchronously controlled, that is, the on and off of the light emitting units are controlled by the same signal line.

In addition, it should be noted that, in the above drawings, all the light emitting units are equal in size, but the drawings are only exemplary, and in fact, the light emitting units of different colors may be unequal in size.

The structure, the working principle and the like of a single light control layer are mainly explained above, and in practical application, full-color display is usually realized by sub-pixels of three primary colors of RGB. That is, on the basis of the above-described scheme, only a single color of light can be emitted by a single light emitting unit.

Therefore, when the light emitting unit includes three light emitting units with different emission colors, that is, three light emitting units of RGB, respectively, the arrangement of the plurality of light emitting units needs to be designed to realize full-color display. The following scheme can be specifically adopted:

in some embodiments, the light emitting colors of two adjacent light emitting units correspondingly covered by each light control unit are the same, and the colors of the emergent light of every adjacent three light control units are all different.

For a better understanding, reference is made to the accompanying drawings. Referring to fig. 6, the light emitting cells of the three RGB colors may be cyclically arranged in a manner of "RL, RR, GL, GR, BL, BR". In fig. 5, RL denotes a red light-emitting unit that emits light to be received by the left eye of the viewer, RR denotes a red light-emitting unit that emits light to be received by the right eye of the viewer, GL denotes a green light-emitting unit that emits light to be received by the left eye of the viewer, GR denotes a green light-emitting unit that emits light to be received by the right eye of the viewer, BL denotes a blue light-emitting unit that emits light to be received by the left eye of the viewer, and BR denotes a blue light-emitting unit that emits light to be received by the right eye of the viewer. As can be seen from fig. 6, after the light emitted by the three light-emitting units RL, GL and BL is adjusted by the light control unit, full-color display can be realized for the left eye of the observer (the left eye can receive light of three colors of RGB); similarly, after light emitted by the three light emitting units RR, GR, and BR is adjusted by the light control unit, full-color display can be achieved for the right eye of the observer (the right eye can also receive light of three colors of RGB).

It is understood that the arrangement order of the light emitting units of the three RGB colors shown in fig. 6 is only exemplary, and the same effect can be achieved after the arrangement order of some of the light emitting units is adjusted on the basis of fig. 6. For example, the arrangement of "RL, RR, GL, GR, BL, BR" shown in fig. 6 may be adjusted to the arrangement of "RL, RR, BL, BR, GL, GR".

In other embodiments, the light emitting color of each adjacent three light emitting units is different.

For a better understanding, reference is made to the accompanying drawings. Referring to fig. 7, the light emitting cells of the three RGB colors may be cyclically arranged in a manner of "RL, GR, BL, RR, GL, BR". In fig. 7, the meanings of RL, GR, BL, RR, GL, and BR are the same as those in fig. 6, and are not repeated. As can be seen from fig. 6, after the light emitted by the three light-emitting units RL, GL and BL is adjusted by the light control unit, full-color display can be realized for the left eye of the observer (the left eye can receive light of three colors of RGB); similarly, after light emitted by the three light emitting units RR, GR, and BR is adjusted by the light control unit, full-color display can be achieved for the right eye of the observer (the right eye can also receive light of three colors of RGB).

It is understood that the arrangement sequence of the light emitting units of the three RGB colors shown in fig. 7 is also only exemplary, and on the basis of fig. 7, the arrangement sequence of some of the light emitting units may be adjusted, and still the same effect can be achieved. For example, the arrangement of "RL, GR, BL, RR, GL, BR" shown in fig. 7 may be adjusted to the arrangement of "RL, RR, BL, GR, GL, BR".

It should be noted that, as described above, the directions of the plurality of light rays emitted by each light-emitting unit 21 are different, and the light rays emitted by the light-emitting units 21 are incident on the light control interface 310 in different directions, and then reach the first region or the second region (not shown in fig. 6 and 7) after being controlled by the light control unit 31. However, it can be understood that even if the right eye of the observer is located in the first region or the second region, the light in the corresponding region does not reach the eyes of the observer completely, that is, only part of the light emitted by the light emitting unit 21 and adjusted by the light control unit 31 can be received by the eyes of the observer.

Based on this, for convenience of explanation and comparison, in fig. 6 and 7, only one of the light rays emitted by each light emitting unit and adjusted by the light ray control unit to be emitted is shown, and the remaining light rays are omitted.

Exemplary preparation method

Referring to fig. 8, fig. 8 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present invention. As shown in fig. 8, an embodiment of the present invention provides a method for manufacturing a display panel, including:

step S101: a light-emitting functional layer is formed on a substrate.

The light emitting function layer comprises a plurality of light emitting units, and each light emitting unit comprises at least one sub-pixel.

Specifically, the positions of different sub-pixels are defined by pixel defining layers, and a pixel opening is formed between adjacent pixel defining layers, so that the sub-pixel can be formed in the pixel opening. The pixel defining layer can be obtained by first preparing an entire insulating layer on the substrate and then etching the insulating layer, which is a prior art and therefore not described in detail. Each sub-pixel comprises at least an anode, a cathode and a light-emitting layer between the anode and the cathode, and the respective layer structures can be formed by evaporation or the like, which is also the prior art, and therefore, the details thereof are not described.

Step S102: a first refraction layer is formed on the light emitting side of the light emitting function layer by utilizing a first material, and the first refraction layer is subjected to graphical processing so as to form a plurality of strip-shaped grooves which are distributed along a first direction and extend along a second direction on the first refraction layer. Wherein the first direction and the second direction are perpendicular.

Specifically, after the light emitting functional layer is formed, an encapsulation layer may be first formed on the light emitting functional layer to protect the structure of the light emitting functional layer from water and oxygen. And then, coating a first material with the refractive index n1 on the packaging layer to form a first refraction layer, and patterning the first refraction layer through etching treatment, so that a plurality of strip-shaped grooves are formed on the first refraction layer.

Step S103: and filling each strip-shaped groove with a second material to form a second refraction layer in each strip-shaped groove, so that the first refraction layer and the second refraction layer form a plurality of light ray control units.

Wherein the refractive index n1 of the first material is smaller than the refractive index n2 of the second material; the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for transmitting light emitted by the two adjacent light-emitting units to the first area and the second area respectively.

Specifically, after the first refractive layer having the plurality of stripe-shaped grooves is formed in the foregoing step, the second refractive layer may be formed by covering at least the grooves with the second material having the refractive index n2. The first refraction layer and the second refraction layer constitute a light control unit. Specific materials of the first refractive layer and the second refractive layer are not limited, but the refractive index n1< n2 needs to be ensured.

In some embodiments, on the basis of the above steps, before forming the first refraction layer on the light exit side of the light-emitting functional layer by using the first material, the method for manufacturing a display panel further includes: a plurality of light shielding units are formed on the light emitting side of the light emitting functional layer. The light shielding unit is used for absorbing stray light, and the light shielding unit can be a black matrix, for example.

Accordingly, the step of forming the first refractive layer on the light-emitting side of the light-emitting function layer by using the first material may specifically include: a first refractive layer is formed between adjacent light shielding units using a first material. Therefore, after the first refractive layer is formed between the shading units, the stray light which is emitted from the first refractive layer and/or the second refractive layer and is actually not needed can be absorbed by the shading units, and the final display effect cannot be influenced by the stray light.

The structures of the layers, the corresponding descriptions and the corresponding materials of the display panel prepared by the preparation method can refer to the corresponding descriptions in the "exemplary display panel", and are not repeated here.

Exemplary display device

The embodiment of the invention also provides a display device which comprises the display panel in any one of the embodiments. As shown in fig. 9, fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device may be a smart phone, a tablet computer, or the like.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

Unless defined otherwise, technical or scientific terms used herein according to the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar language throughout this specification does not denote any order, quantity, or importance, but rather the terms "first," "second," and similar language are used to distinguish one element from another.

Unless the context requires otherwise, throughout the description, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to". In the description of the specification, the terms "one embodiment," "some embodiments," "example embodiments," "examples," "particular examples," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

Claims (10)

1. A display panel, comprising;

a substrate;

a light emitting functional layer disposed on the substrate and including a plurality of light emitting cells; each of the light emitting units includes at least one sub-pixel;

the light ray control layer is arranged on the light emitting side of the light emitting function layer and comprises a plurality of light ray control units;

the light control unit comprises a light control interface formed by film layers with different refractive indexes; and the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for enabling the light rays emitted by the two adjacent light-emitting units correspondingly covered in the first direction to respectively propagate to the first area and the second area through the light control interface.

2. The display panel according to claim 1, wherein the light control unit comprises a first refractive layer and a second refractive layer, and an interface of the first refractive layer and the second refractive layer is the light control interface;

the first refraction layer is arranged on the light emitting side of the light emitting functional layer, and the side face, far away from the light emitting side, of the first refraction layer is provided with a strip-shaped groove extending along the second direction _， The second refraction layer is arranged in the strip-shaped groove; the refractive index of the first refraction layer is smaller than that of the second refraction layer; the second direction is perpendicular to the first direction.

3. The display panel of claim 1, wherein the light control interface is symmetrical about a mid-vertical plane of a line connecting the two adjacent light emitting units.

4. The display panel of claim 1, wherein a cross-section of the light control interface along a target plane has a shape of at least one arc or at least two line segments; wherein the target plane is a plane parallel to the first direction and perpendicular to the substrate.

5. The display panel of claim 1, wherein the light control layer further comprises a light blocking unit disposed between adjacent light control units, the light blocking unit configured to absorb stray light.

6. The display panel according to claim 1, wherein the light-emitting unit includes three light-emitting units different in emission color;

the light emitting colors of the two adjacent light emitting units correspondingly covered by each light ray control unit are the same, and the colors of the emergent light rays of every three adjacent light ray control units are different; alternatively, the light emitting color of each adjacent three of the light emitting units is different.

7. The display panel according to claim 2, wherein an orthographic projection of each of the light control units on the substrate covers an orthographic projection of at least one of the light emitting units on the substrate in the second direction.

8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.

9. A method for manufacturing a display panel, comprising:

forming a light emitting functional layer on a substrate; the light emitting function layer comprises a plurality of light emitting units, each of which comprises at least one sub-pixel;

forming a first refraction layer on the light emergent side of the light emitting function layer by using a first material, and performing patterning treatment on the first refraction layer to form a plurality of strip-shaped grooves which are distributed along a first direction and extend along a second direction on the first refraction layer; wherein the first direction and the second direction are perpendicular;

filling each strip-shaped groove with a second material to form a second refraction layer in each strip-shaped groove; the refractive index of the first material is smaller than that of the second material, and the first refraction layer and the second refraction layer form a plurality of light ray control units; the orthographic projection of each light control unit on the substrate covers the orthographic projection of two adjacent light-emitting units on the substrate in the first direction, and the light control units are used for transmitting light emitted by the two adjacent light-emitting units to the first area and the second area respectively.

10. The method according to claim 9, wherein before forming the first refractive layer on the light exit side of the light-emitting functional layer using the first material, the method further comprises:

forming a plurality of light shielding units on the light emitting side of the light emitting functional layer;

the forming of the first refractive layer on the light-emitting side of the light-emitting functional layer by using the first material includes:

a first refractive layer is formed between adjacent ones of the light shield units using a first material.

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