CN113380862B - Display panel and preparation method thereof - Google Patents
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H10K50/81—Anodes
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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Abstract
The invention relates to the technical field of display and discloses a display panel and a preparation method thereof. The surface of the anode layer exposed by the peep-proof pixel opening of the display panel is provided with a first groove, so that the surface is provided with a flat part and a slope part. Wherein the flat portion is perpendicular to a predetermined direction, and the slope portion is inclined with respect to the predetermined direction. The light beam output by the light-emitting layer positioned at the flat part has a first color deviation, and the light beam output by the light-emitting layer positioned at the slope part has a second color deviation, wherein the first color deviation is smaller than the second color deviation. Through the mode, the anti-peeping function of the display panel can be realized, and the brightness of the display panel is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a preparation method thereof.
Background
Display screens carried by electronic devices such as mobile phone terminals and notebook computers gradually develop towards a wide viewing angle, and users want to avoid the leakage of screen information while enjoying the visual experience brought by the wide viewing angle so as to effectively protect business confidentiality and personal privacy.
Currently, display screens such as display technology using LCD (Liquid Crystal Display ) are usually adjusted by actively driving liquid crystal to adjust the visual viewing angle of the display screen, which tends to complicate the display control process of the display screen and is not suitable for display screens using OLED (Organic Light Emitting Diode ) display technology.
Disclosure of Invention
In view of the above, the present invention mainly solves the technical problem of providing a display panel and a manufacturing method thereof, which can realize the peep-proof function of the display panel and is beneficial to improving the brightness of the display panel.
In order to solve the technical problems, the invention adopts a technical scheme that: a display panel is provided. The display panel includes a lower layer. The display panel further includes an anode layer disposed on one side of the underlying layer. The display panel also comprises a pixel definition layer, wherein the pixel definition layer is arranged on one side of the anode layer, which is away from the underlayer, and is provided with a plurality of pixel openings which are arranged in an array, and at least part of the pixel openings are peep-proof pixel openings; the surface of the anode layer exposed by the peep-proof pixel opening is provided with a first groove, the surface is provided with a flat part and a slope part, the flat part is perpendicular to a preset direction, and the slope part is obliquely arranged relative to the preset direction, wherein the preset direction is the lamination direction of the underlayer, the anode layer and the pixel definition layer. The display panel also comprises a light-emitting layer, wherein the light-emitting layer is arranged in the pixel opening, the light beam output by the light-emitting layer positioned at the flat part has a first color deviation, and the light beam output by the light-emitting layer positioned at the sloping part has a second color deviation, wherein the first color deviation is smaller than the second color deviation.
In an embodiment of the invention, the display panel further includes an optical optimization layer, and the optical optimization layer is disposed on a side of the light-emitting layer facing away from the anode layer; the light beam output by the light emitting layer positioned at the flat part has a first incidence angle at the optical optimization layer, and the light beam output by the light emitting layer positioned at the slope part has a second incidence angle at the optical optimization layer, wherein the first incidence angle is smaller than the second incidence angle.
In an embodiment of the present invention, the slope portion is inclined at an angle of 30 ° to 70 ° with respect to the predetermined direction.
In an embodiment of the present invention, the peep-proof pixel opening defines a peep-proof sub-pixel, and the other pixel openings except the peep-proof pixel opening define a normal sub-pixel, wherein the surface of the anode layer exposed by the pixel opening of the normal sub-pixel is a plane; the display panel is divided into a display area, and the peep-proof sub-pixel is close to the outer edge of the display area relative to the conventional sub-pixel.
In an embodiment of the invention, the outer edge of the display area includes a first edge area, a second edge area and a corner area, the first edge area extends along a first direction, the second edge area extends along a second direction, the first edge area and the second edge area are connected through the corner area, wherein the first direction is different from the second direction; the peep-proof sub-pixel comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; the first sub-pixel is arranged close to the first edge area, and the first groove of the first sub-pixel extends along the first direction; the second sub-pixel is arranged close to the second edge area, and the first groove of the second sub-pixel extends along the second direction; the third sub-pixel is arranged close to the corner region, one end of the first groove of the third sub-pixel extends towards the first edge region, and the other end extends towards the second edge region.
In an embodiment of the invention, an extending direction of the first groove of the third subpixel is disposed obliquely with respect to the first direction and the second direction, respectively; the number of the third sub-pixels is a plurality; the inclination angle of the first groove of each third sub-pixel relative to the first direction is gradually reduced along the direction close to the first edge area, and the inclination angle of the first groove of each third sub-pixel relative to the second direction is gradually reduced along the direction close to the second edge area.
In an embodiment of the present invention, the number of peep-proof sub-pixels is a plurality; the number of the first grooves in each peep-proof sub-pixel is gradually reduced along the direction away from the outer edge.
In one embodiment of the invention, the underlayer comprises an anode planarizing layer; the surface of the anode flat layer facing the anode layer is provided with a second groove, and the anode layer and the anode flat layer are in concave-convex jogging, so that the surface of the anode layer facing away from the anode flat layer forms a first groove.
In one embodiment of the present invention, the underlying layer further comprises a base layer and an anode signal line; the base layer, the anode signal line and the anode flat layer are sequentially laminated along the direction close to the anode layer; the anode flat layer is provided with a conductive hole communicated with the anode signal wire, and the anode layer is electrically connected with the anode signal wire through the conductive hole.
In order to solve the technical problems, the invention adopts another technical scheme that: a method for manufacturing a display panel is provided. The preparation method comprises the following steps: providing a backing layer; forming an anode layer on one side of the underlayer, and forming a first groove on the surface of the anode layer facing away from the underlayer; forming a pixel definition layer on one side of the anode layer, which is far away from the underlayer, wherein the pixel definition layer is provided with a plurality of pixel openings which are arrayed, at least part of the pixel openings are peep-proof pixel openings, the surface of the anode layer exposed by the peep-proof pixel openings is provided with a first groove, the surface is provided with a flat part and a slope part, the flat part is perpendicular to a preset direction, the slope part is obliquely arranged relative to the preset direction, and the preset direction is the lamination direction of the underlayer, the anode layer and the pixel definition layer; and forming a light-emitting layer in the pixel opening, wherein the light beam output by the light-emitting layer positioned at the flat part has a first color deviation, and the light beam output by the light-emitting layer positioned at the slope part has a second color deviation, and the first color deviation is smaller than the second color deviation.
The beneficial effects of the invention are as follows: different from the prior art, the invention provides a display panel and a preparation method thereof. The surface of the anode layer exposed by the peep-proof pixel opening of the display panel is provided with a first groove, so that the surface is provided with a flat part and a slope part. The flat part is perpendicular to the preset direction, and the slope part is obliquely arranged relative to the preset direction, so that the first color deviation is smaller than the second color deviation, namely the color deviation of the light beam output by the light-emitting layer positioned on the slope part is serious. Therefore, after the light beam output by the light-emitting layer positioned at the flat part and the light beam output by the light-emitting layer positioned at the slope part are overlapped in the lateral direction, the finally displayed lateral picture has a certain degree of color cast so as to achieve the effect of preventing lateral peeping, thereby realizing the peeping prevention function of the display panel.
And, because the surface of the anode layer is provided with the first groove, the surface area of the anode layer is increased, namely the contact area between the anode layer and the light-emitting layer is increased, which is beneficial to improving the light-emitting brightness of the light-emitting layer, namely the brightness of the display panel.
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. Furthermore, these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
FIG. 1 is a schematic view of a first embodiment of a display panel according to the present invention;
FIG. 2 is a schematic view of the peep-proof principle of the display panel of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a display panel according to the present invention;
FIG. 4 is a schematic diagram of a first embodiment of a first sub-pixel according to the present invention;
FIG. 5 is a schematic diagram of a second embodiment of a sub-pixel according to the present invention;
FIGS. 6a-6b are schematic diagrams illustrating the structure of a third sub-pixel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a pixel group P1 in the display panel shown in FIG. 3;
FIG. 8 is a schematic diagram of a pixel group P2 in the display panel shown in FIG. 3;
FIG. 9 is a schematic diagram of a pixel group P3 in the display panel shown in FIG. 3;
FIG. 10 is a schematic diagram of a third embodiment of a display panel according to the present invention;
FIG. 11 is a schematic flow chart of an embodiment of a method for manufacturing a display panel according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are 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. The following embodiments and features of the embodiments may be combined with each other without conflict.
In order to solve the technical problem that the peep-proof function of the display panel is difficult to realize in the prior art, an embodiment of the invention provides a display panel. The display panel includes a lower layer. The display panel further includes an anode layer disposed on one side of the underlying layer. The display panel also comprises a pixel definition layer, wherein the pixel definition layer is arranged on one side of the anode layer, which is away from the underlayer, and is provided with a plurality of pixel openings which are arranged in an array, and at least part of the pixel openings are peep-proof pixel openings; the surface of the anode layer exposed by the peep-proof pixel opening is provided with a first groove, the surface is provided with a flat part and a slope part, the flat part is perpendicular to a preset direction, and the slope part is obliquely arranged relative to the preset direction, wherein the preset direction is the lamination direction of the underlayer, the anode layer and the pixel definition layer. The display panel also comprises a light-emitting layer, wherein the light-emitting layer is arranged in the pixel opening, the light beam output by the light-emitting layer positioned at the flat part has a first color deviation, and the light beam output by the light-emitting layer positioned at the sloping part has a second color deviation, wherein the first color deviation is smaller than the second color deviation. The details are set forth below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the invention.
In one embodiment, the display panel may employ OLED display technology or the like. The conventional display screen using the LCD display technology, which adjusts the visual angle by actively driving the liquid crystal, is not suitable for the display panel of the present embodiment. In other words, the present embodiment aims to provide a peep-proof design suitable for OLED display technology.
The display panel includes a lower layer 10 and an anode layer 20, the anode layer 20 being disposed at one side of the lower layer 10. The underlayer 10 is a collection of film layers below the anode layer 20, and the underlayer 10 may include a buffer layer, an array layer, a planarization layer, and the like. The anode layer 20 is used for providing an anode signal to drive the display panel to emit light for display, wherein the anode layer 20 is electrically connected to an anode signal line in the underlying layer 10, which will be described in detail below.
The display panel further comprises a pixel defining layer 30, the pixel defining layer 30 being arranged on a side of the anode layer 20 facing away from the underlying layer 10. The pixel defining layer 30 has a plurality of pixel openings 31 arranged in an array to define a plurality of sub-pixels arranged in an array. Typically, one pixel opening 31 defines one sub-pixel, and the sub-pixels of different luminescent colors form one complete pixel unit, for example, three sub-pixels of luminescent colors of red, green and blue form one complete pixel unit, etc.
The display panel further comprises a light emitting layer 40. The pixel opening 31 exposes the anode layer 20, and the light emitting layer 40 is disposed on the anode layer 20 in the pixel opening 31, so that the light emitting layer 40 can contact with the anode layer 20 to form an electrical connection. The anode signal provided by the anode layer 20 is input into the light emitting layer 40 to drive the light emitting layer 40 to emit light, so as to drive the display panel to emit light for display.
At least part of the plurality of pixel openings 31 of the pixel defining layer 30 is a peep-proof pixel opening, and the surface of the anode layer 20 exposed by the peep-proof pixel opening is provided with a first groove 21, so that the surface of the anode layer 20 exposed by the peep-proof pixel opening is provided with a flat portion 22 and a slope portion 23. The flat portion 22 is perpendicular to a predetermined direction (as indicated by an arrow Z in fig. 1, the same applies hereinafter), and the slope portion 23 is disposed obliquely with respect to the predetermined direction. The predetermined direction is a lamination direction of the underlying layer 10, the anode layer 20, and the pixel defining layer 30, that is, the underlying layer 10, the anode layer 20, and the pixel defining layer 30 are laminated in this order along the predetermined direction.
Specifically, the side wall of the first groove 21 is a slope 23, and the bottom of the first groove 21 and/or the surface of the anode layer 20 outside the first groove 21 is a flat 22. The bottom of the first groove 21 shown in fig. 1 is a plane, and thus the bottom of the first groove 21 and the surface of the anode layer 20 outside the first groove 21 in fig. 1 are both flat portions 22. In the case where the bottom of the first groove 21 is not planar and the surface of the anode layer 20 other than the first groove 21 is planar, only the surface of the anode layer 20 other than the first groove 21 is the flat portion 22. In the case where the surface of the anode layer 20 other than the first groove 21 is not planar and the groove bottom of the first groove 21 is planar, only the groove bottom of the first groove 21 is the flat portion 22.
The light beam outputted from the light emitting layer 40 located at the flat portion 22 has a propagation direction different from that of the light beam outputted from the light emitting layer 40 located at the slope portion 23. The light beam output from the light emitting layer 40 located at the slope portion 23 is superimposed with the light beam output from the light emitting layer 40 located at the flat portion 22 in the lateral direction. The light beam output from the light emitting layer 40 located at the flat portion 22 has a first color shift, and the light beam output from the light emitting layer 40 located at the slope portion 23 has a second color shift, wherein the first color shift is smaller than the second color shift. In this way, after the light beam outputted from the light emitting layer 40 located in the flat portion 22 and the light beam outputted from the light emitting layer 40 located in the slope portion 23 are laterally overlapped, the finally displayed lateral image has a certain degree of color shift, so as to achieve the effect of preventing lateral peeping. That is, the lateral image of the display panel has a certain degree of color shift, and the display effect of the lateral viewing angle of the display panel is deteriorated, so that the lateral image is utilized to prevent other people from peeping to the display content from the lateral direction of the display panel, and the peeping prevention function of the display panel is realized.
Referring to fig. 2, the normal line O is parallel to the predetermined direction, and the angle between the light exiting from the right side of the normal line O and the normal line O is positive, and the angle between the light exiting from the left side of the normal line O and the normal line O is negative. The maximum exit angles of the light beams outputted from the light emitting layers 40 located at the flat portions 22 are- θ and +θ, and the minimum exit angles of the light beams outputted from the light emitting layers 40 located at the slope portions 23 are- λ and +λ. The light beam outputted from the light emitting layer 40 located at the flat portion 22 and the light beam outputted from the light emitting layer 40 located at the slope portion 23 are overlapped in the viewing angle ranges of- θ to- λ and +λ to +θ to generate a color shift image M, so as to achieve the anti-peeping effect, and the user can still view a normal image in the viewing angle range of- λ to +λ.
Note that the degree of color shift is defined as the degree of difference between the color of the light beam output from the light emitting layer 40 and the theoretical color. The larger the color deviation, the larger the difference between the color of the light beam output by the light emitting layer 40 and the theoretical color; the smaller the degree of color shift, the smaller the difference between the color of the light beam output from the light emitting layer 40 and the theoretical color. The first color deviation is smaller than the second color deviation, which means that the difference between the color of the light beam output by the light emitting layer 40 located at the flat portion 22 and the theoretical color is smaller than the difference between the color of the light beam output by the light emitting layer 40 located at the slope portion 23 and the theoretical color.
Also, since the first grooves 21 are provided on the surface of the anode layer 20, the surface area of the anode layer 20, i.e., the contact area between the anode layer 20 and the light emitting layer 40 is increased, which is advantageous for improving the light emitting luminance of the light emitting layer 40, i.e., for improving the luminance of the display panel. The display panel is usually designed with an HBM (High Brightness Monitor, high-brightness display) mode, and the present embodiment increases the contact area between the anode layer 20 and the light-emitting layer 40, so that the HBM mode of the display panel can well meet the requirements for brightness.
Please continue to refer to fig. 1. In an embodiment, the display panel further comprises an optical optimization layer 50, the optical optimization layer 50 being arranged on a side of the light emitting layer facing away from the anode layer 20. The light-emitting layer is made of an electroluminescent material for realizing the light-emitting function of the light-emitting layer 40. The optical optimization layer 50 is used for optically modulating the light beam output by the light emitting layer to optimize the color point, color temperature, purity, etc. of the light beam output by the light emitting layer.
In particular, the optical optimization layer 50 may include an optical modulation layer, a material protection layer, and the like. The optical modulation layer can be made of materials such as acrylic, epoxy resin or polyimide, and the material protection layer can be made of materials such as lithium fluoride. The specific optical modulation principle of the optical modulation layer and the material protection layer belongs to the understanding scope of those skilled in the art, and will not be described herein.
In the conventional display panel, the optical optimization layer 50 optimizes color point, color temperature, purity and other problems, and the light beam output by the light emitting layer 40 is interfered and scattered under the modulation of the optical optimization layer 50, so that the conventional display panel has a larger visual angle. The optical optimization layer 50 requires that the light beam be normally incident or at a small incident angle to be modulated. If the incident angle of the light beam is large, the light beam modulated by the optical optimization layer 50 will have serious color shift problem.
In view of this, the present embodiment uses the requirement of the optical optimization layer 50 for the incident angle of the incident light to realize the peep-proof function of the display panel. Specifically, the light beam output by the light emitting layer 40 located at the flat portion 22 has a first incident angle α at the optical optimization layer 50, wherein the first incident angle α is smaller, meaning that the light beam output by the light emitting layer 40 located at the flat portion 22 is incident perpendicularly or is incident at a smaller angle away from the perpendicular; the light beam output by the light emitting layer 40 located on the slope 23 has a second incident angle β in the optical optimization layer 50, wherein the first incident angle α is smaller than the second incident angle β, i.e. the second incident angle β is larger, which means that the incident angle of the light beam output by the light emitting layer 40 located on the slope 23 is larger, so that the light beam output by the light emitting layer 40 located on the slope 23 is more severely color-shifted after passing through the optical optimization layer 50, and further the first color-shift is smaller than the second color-shift.
The light beam output by the light emitting layer 40 located in the flat portion 22 has small color deviation after being modulated by the optical optimization layer 50, and even no color deviation problem exists.
Please continue to refer to fig. 1. In one embodiment, the inclination of the slope 23 affects the anti-peeping viewing angle of the display panel, i.e., affects the viewing angle ranges from- θ to- λ and +λ to +θ. The inclination angle δ of the slope 23 with respect to the predetermined direction determines the value of λ. Specifically, the larger the inclination angle δ of the slope 23 with respect to the predetermined direction, the smaller the value of λ, the larger the viewing angle range of the color cast screen is formed, and the smaller the inclination angle δ of the slope 23 with respect to the predetermined direction, the larger the value of λ is, the smaller the viewing angle range of the color cast screen is formed.
The inclination angle delta of the slope 23 relative to the preset direction can be reasonably selected according to the requirements of different display panel products on the peep-proof viewing angle. Alternatively, the inclination angle δ of the slope 23 with respect to the predetermined direction may be 30 ° to 70 °, such that λ has a value of 15 ° to 45 °, i.e., the viewing angle range in which the user can view the normal screen is ±15° to ±45°. For example, when the inclination angle δ of the slope 23 with respect to the predetermined direction is 30 °, the value of λ is 45 °, that is, the viewing angle range from-45 ° to +45° at which the user can view the normal screen; when the inclination angle δ of the slope 23 with respect to the predetermined direction is 70 °, the value of λ is 15 °, i.e., the viewing angle range from-15 ° to +15° at which the user can view the normal screen.
It should be noted that the inclination angle δ of the slope 23 with respect to the predetermined direction may be adjusted by adjusting the depth and width of the first groove 21.
Referring to fig. 1 and 3, fig. 3 is a schematic structural diagram of a second embodiment of a display panel according to the present invention.
In an embodiment, the display panel is divided into a display area a, where the display area a is an area of the display panel for displaying light, and the plurality of arrayed sub-pixels are located in the display area a. Of course, the remaining area of the display panel is the non-display area.
The plurality of sub-pixels includes a peep-preventing sub-pixel 61 and a regular sub-pixel 62, the peep-preventing pixel opening defining the peep-preventing sub-pixel 61, and the other pixel openings except the peep-preventing pixel opening defining the regular sub-pixel 62. The surface of the anode layer 20 exposed by the pixel opening 31 of the peep-proof sub-pixel 61 is provided with a first groove 21, and the surface of the anode layer 20 exposed by the pixel opening 31 of the regular sub-pixel 62 is a plane, i.e. the surface of the anode layer 20 exposed by the pixel opening 31 of the regular sub-pixel 62 is not provided with the first groove 21. In short, the peep-proof sub-pixel 61 functions not only as a normal light emitting display but also as a peep-proof function, and the normal sub-pixel 62 functions only as a normal light emitting display.
Since the display content of the display panel is typically peeped laterally from the display panel by others, i.e. peeped laterally from the display panel to the display content of the display panel by others, the peeping requirements for the sub-pixels closer to the outer edge 70 of the display area a are higher, while the peeping requirements for the sub-pixels closer to the middle of the display area a are lower. In view of this, in the present embodiment, the peep-proof sub-pixel 61 is close to the outer edge 70 of the display area a relative to the conventional sub-pixel 62, so that the peep-proof effect of the display panel can be ensured, and meanwhile, the sub-pixel in the middle of the display area a maintains the conventional pixel design, which is beneficial to simplifying the production process of the display panel.
Further, the outer edge 70 of the display area a includes a first edge area 71, a second edge area 72, and a corner area 73. The first edge region 71 extends in a first direction (as indicated by arrow X in fig. 3, the same applies hereinafter) and the second edge region 72 extends in a second direction (as indicated by arrow Y in fig. 3, the same applies hereinafter), the first edge region 71 and the second edge region 72 being connected by an angular landing region 73.
Wherein the first direction is different from the second direction. Alternatively, the first direction may be perpendicular to the second direction, for example, the first direction may be a horizontal direction as shown in fig. 3, and the second direction may be a vertical direction as shown in fig. 3. Also, the first edge region 71 extending in the first direction and the second edge region 72 extending in the second direction are not required to extend strictly in the first direction and the second edge region 72 extending strictly in the second direction, allowing the extending direction of the first edge region 71 to be at an angle to the first direction and allowing the extending direction of the second edge region 72 to be at an angle to the second direction.
The peep-proof sub-pixel 61 includes a first sub-pixel 611, a second sub-pixel 612, and a third sub-pixel 613.
The first sub-pixel 611 is disposed near the first edge area 71, and the first groove 21 of the first sub-pixel 611 extends along the first direction, as shown in fig. 4, so that it is capable of preventing others from peeping the display content of the display panel along the second direction at the position of the first edge area 71. The second sub-pixel 612 is disposed near the second edge area 72, and the first groove 21 of the second sub-pixel 612 extends along the second direction, as shown in fig. 5, so that it is capable of preventing others from peeping to the display content of the display panel along the first direction at the location of the second edge area 72. The third sub-pixel 613 is disposed near the corner region 73, and one end of the first groove 21 of the third sub-pixel 613 extends toward the first edge region 71, and the other end extends toward the second edge region 72, as shown in fig. 6a-6b, so that it is possible to prevent others from peeping into the display content of the display panel in the diagonal direction at the position of the corner region 73.
The first grooves 21 of the third sub-pixel 613 may extend along a straight line as shown in fig. 6a-6 b. Of course, in other embodiments of the present invention, the first groove 21 of the third sub-pixel 613 may also extend along a curve, which is not limited herein.
For example, the outer edge 70 of the display area a has a rectangular-like shape with two opposite first edge areas 71 and two opposite second edge areas 72, and the adjacent first edge areas 71 and second edge areas 72 are connected by an angular drop area 73. The outer edge 70 of the display area a has one corner area 73 at each of the upper right, lower right, upper left and lower left positions. The extending directions of the first grooves 21 of the third sub-pixels 613 in fig. 6a and 6b are different, and fig. 6a shows the third sub-pixel 613 in the corner regions 73 in the lower right and upper left positions, and fig. 6b shows the third sub-pixel 613 in the corner regions 73 in the upper right and lower left positions.
Further, the extending direction of the first groove 21 of the third sub-pixel 613 is inclined with respect to the first direction and the second direction, respectively, and the first groove 21 of the third sub-pixel 613 may extend in a straight direction. The number of third sub-pixels 613 of the corner region 73 is plural. If the extending directions of the first grooves 21 of the adjacent third sub-pixels 613 are different, a difference exists between the display effects of the adjacent third sub-pixels 613, wherein the larger the extending direction difference of the first grooves 21 of the adjacent third sub-pixels 613 is, the larger the display effect difference of the adjacent third sub-pixels 613 is, and vice versa.
Accordingly, the inclination angle of the first groove 21 of each third sub-pixel 613 relative to the first direction is gradually reduced along the direction approaching the first edge region 71, so that the difference of the display effects of the adjacent third sub-pixels 613 can be well transited, and the adverse effect of the abrupt change of the display effects of the adjacent third sub-pixels 613 on the whole display effect of the display panel is avoided. Fig. 7 shows a case where the inclination angle of the first groove 21 of each third sub-pixel 613 with respect to the first direction decreases one by one in a direction approaching the first edge region 71.
In addition, the inclination angle of the first groove 21 of each third sub-pixel 613 relative to the second direction is gradually reduced along the direction approaching the second edge region 72, so that the difference of the display effects of the adjacent third sub-pixels 613 can be well transited, and the adverse effect of the abrupt change of the display effects of the adjacent third sub-pixels 613 on the whole display effect of the display panel is avoided. Fig. 8 shows a case where the inclination angle of the first groove 21 of each third sub-pixel 613 with respect to the second direction decreases one by one in a direction approaching the second edge region 72.
Of course, the number of the first sub-pixels 611 and the second sub-pixels 612 may be plural, which is not limited herein.
Please refer to fig. 9. In an embodiment, the greater the number of first grooves 21 of the peep-preventing sub-pixel 61, the better the peep-preventing effect thereof. If the number of the first grooves 21 of the adjacent peep-preventing sub-pixels 61 is different, a difference exists between the display effects of the adjacent peep-preventing sub-pixels 61, wherein the larger the difference of the number of the first grooves 21 of the adjacent peep-preventing sub-pixels 61 is, the larger the difference of the display effects of the adjacent peep-preventing sub-pixels 61 is, and vice versa.
In view of this, the number of the first grooves 21 in each peep-proof sub-pixel 61 decreases one by one along the direction away from the outer edge 70 of the display area a, so that the difference of the display effects of the adjacent peep-proof sub-pixels 61 can be well transited, so that the peep-proof sub-pixels 61 gradually approach the display effect of the regular sub-pixels 62, and the display effect mutation of the adjacent peep-proof sub-pixels 61 is prevented from adversely affecting the overall display effect of the display panel.
Please continue to refer to fig. 1. In one embodiment, the underlayer 10 includes an anode planarizing layer 11. The surface of the anode flat layer 11 facing the anode layer 20 is provided with second grooves 12 such that the surface of the anode flat layer 11 facing the anode layer 20 presents a rugged surface topography. The anode layer 20 is manufactured on the surface of the uneven anode flat layer 11, and because the thicknesses of the positions of the anode layer 20 are relatively uniform, the anode layer 20 and the anode flat layer 11 are in concave-convex jogging, so that the surface of the anode layer 20, which is away from the anode flat layer 11, forms a first groove 21, and in particular, the first groove 21 is embedded in the second groove 12.
The inclination angle of the slope 23 with respect to the predetermined direction is adjusted by adjusting the depth and width of the first groove 21, specifically, the depth and width of the second groove 12, so as to adjust the inclination angle of the slope 23 with respect to the predetermined direction.
Alternatively, the depth of the second groove 12 may be 0.2 μm to 0.5 μm, and the width of the second groove 12 may be 5 μm to 10 μm. By the matching design of the depth and width of the second groove 12, the inclination angle of the slope 23 with respect to the predetermined direction is made as described above 30 ° to 70 °. Wherein the depth of the second recess 12 is about 12% of the total thickness of the anode flat layer 11.
The depth and width of the second grooves 12 are designed differently, and have different effects on the inclination angle of the slope 23 with respect to the predetermined direction and the contact area between the anode layer 20 and the light emitting layer 40. The requirements of different display panel products on peep-proof visual angle range and brightness can be reasonably selected by combining the manufacturing process difficulty of the anode flat layer 11.
Further, referring to fig. 10, the underlayer 10 further includes a base layer 13 and an anode signal line 14. The base layer 13, the anode signal line 14, and the anode flat layer 11 are stacked in this order in a direction close to the anode layer 20. The base layer 13 is defined as a collection of film layers below the anode signal line 14, and includes, for example, a buffer layer, an array layer, and the like.
The anode flat layer 11 is provided with a conductive hole 15 connected to the anode signal line 14, and the anode layer 20 is electrically connected to the anode signal line 14 through the conductive hole 15. Specifically, when the anode layer 20 is formed on the anode flat layer 11, the anode layer 20 is formed in the conductive hole 15 at the same time, so that the anode layer 20 is electrically connected to the anode signal line 14. The anode signal line 14 is used for providing an anode signal to the anode layer 20 to drive the display panel to emit light for display.
As shown in fig. 10, the orthographic projection of the anode signal line 14 on the base layer 13 is located on the side of the orthographic projection of the pixel opening 31 on the base layer 13.
Referring to fig. 1 and 11, fig. 11 is a schematic flow chart of an embodiment of a method for manufacturing a display panel according to the present invention. The manufacturing method of the display panel described in this embodiment is based on the display panel described in the above embodiment.
S101: providing a backing layer;
in this embodiment, the underlayer 10 may be manufactured by other processes in advance, or the underlayer 10 may be purchased directly for the process of manufacturing the display panel of this embodiment.
S102: forming an anode layer on one side of the underlayer, and forming a first groove on the surface of the anode layer facing away from the underlayer;
in this embodiment, the anode layer 20 is formed on one side of the underlayer 10, and the specific process of forming the first groove 21 on the surface of the anode layer 20 facing away from the underlayer 10 may be: an anode signal line 14 is formed on the base layer 13, and then an anode flat layer 11 is formed to cover the anode signal line14, then forming conductive holes 15 on the anode flat layer 11, and then using an oxygen plasma ashing process (O 2 Pumping) to form the second recess 12 and then forming the anode layer 20 on the anode planarization layer 11 and in the conductive holes 15, the portion of the anode layer 20 embedded in the second recess 12 forming the first recess 21.
S103: forming a pixel defining layer on a side of the anode layer facing away from the underlying layer;
in the present embodiment, the pixel defining layer 30 is formed on a side of the anode layer 20 facing away from the underlying layer 10 to define a formation region of the sub-pixel on the display panel. The pixel opening 31 of the pixel defining layer 30 exposes the first recess 21 of the surface of the anode layer 20.
S104: forming a light emitting layer in the pixel opening;
in the present embodiment, the light emitting layer 40 is formed on the anode layer 20 in the pixel opening 31, and the light emitting layer 40 covers the first groove 21 and the surface of the anode layer 20 outside the first groove 21, so that a part of the light emitting layer 40 is located at the flat portion 22 and a part of the light emitting layer 40 is located at the slope portion 23. The anode signal of the anode signal line 14 is transmitted to the light emitting layer 40 through the anode layer 20 to drive the light emitting layer 40 to emit light.
The following table shows the materials and the process of each film layer of the display panel of this embodiment:
| film layer | The main material | Process for manufacturing a semiconductor device |
| Light-emitting layer | Organic light-emitting semiconductor | Vapor deposition process |
| Pixel definition layer | Polyacrylic esters | Photoetching process |
| Anode layer | ITO/Ag/ITO | Photoetching process and etching process |
| Anode flat layer | Polyacrylic esters | Ashing process and photolithography process |
| Anode signal line | Ti/Al/Ti | Photoetching process and etching process |
In addition, in the present invention, unless explicitly specified and limited otherwise, the terms "connected," "stacked," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A display panel, comprising:
a lower layer;
an anode layer provided on one side of the lower layer;
the pixel definition layer is arranged on one side of the anode layer, which is away from the underlayer, and is provided with a plurality of pixel openings which are arranged in an array manner, and at least part of the pixel openings are peep-proof pixel openings;
the surface of the anode layer exposed by the peep-proof pixel opening is provided with a first groove, the surface is provided with a flat part and a slope part, the flat part is perpendicular to a preset direction, the slope part is obliquely arranged relative to the preset direction, and the preset direction is the lamination direction of the underlayer, the anode layer and the pixel definition layer;
the light-emitting layer is arranged in the pixel opening, and part of the light-emitting layer is arranged in the first groove; the light beam output by the light-emitting layer positioned at the flat part has a first color deviation, and the light beam output by the light-emitting layer positioned at the slope part has a second color deviation, wherein the first color deviation is smaller than the second color deviation;
the optical optimization layer is arranged on one side of the light-emitting layer, which is away from the anode layer; the light beam output by the light emitting layer positioned at the flat part has a first incidence angle at the optical optimization layer, and the light beam output by the light emitting layer positioned at the slope part has a second incidence angle at the optical optimization layer, wherein the first incidence angle is smaller than the second incidence angle.
2. The display panel according to claim 1, wherein an inclination angle of the slope portion with respect to the predetermined direction is 30 ° to 70 °.
3. The display panel of claim 1, wherein the display panel comprises,
the peep-proof pixel opening defines a peep-proof sub-pixel, other pixel openings except the peep-proof pixel opening define a conventional sub-pixel, and the surface of the anode layer exposed by the pixel opening of the conventional sub-pixel is a plane;
the display panel is divided into a display area, and the peep-proof sub-pixel is close to the outer edge of the display area relative to the conventional sub-pixel.
4. The display panel according to claim 3, wherein,
the outer edge of the display area comprises a first edge area, a second edge area and a corner area, the first edge area extends along a first direction, the second edge area extends along a second direction, the first edge area and the second edge area are connected through the corner area, and the first direction is different from the second direction;
the peep-proof sub-pixel comprises a first sub-pixel, a second sub-pixel and a third sub-pixel;
the first sub-pixel is arranged close to the first edge area, and the first groove of the first sub-pixel extends along the first direction;
the second sub-pixel is arranged close to the second edge area, and the first groove of the second sub-pixel extends along the second direction;
the third sub-pixel is arranged close to the corner area, one end of the first groove of the third sub-pixel extends towards the first edge area, and the other end extends towards the second edge area.
5. The display panel of claim 4, wherein the display panel comprises,
the extending direction of the first groove of the third sub-pixel is obliquely arranged relative to the first direction and the second direction respectively;
the number of the third sub-pixels is a plurality;
the inclination angle of the first groove of each third sub-pixel relative to the first direction is gradually reduced along the direction approaching the first edge area, and the inclination angle of the first groove of each third sub-pixel relative to the second direction is gradually reduced along the direction approaching the second edge area.
6. The display panel according to claim 3, wherein,
the number of the peep-proof sub-pixels is a plurality of;
the number of the first grooves in each peep-proof sub-pixel is gradually reduced along the direction away from the outer edge.
7. The display panel of claim 1, wherein the display panel comprises,
the underlayer comprises an anode planarizing layer;
the surface of the anode flat layer facing the anode layer is provided with a second groove, and the anode layer and the anode flat layer are in concave-convex jogging, so that the surface of the anode layer facing away from the anode flat layer forms the first groove.
8. The display panel of claim 7, wherein the display panel comprises,
the underlayer further comprises a base layer and an anode signal line;
the base layer, the anode signal line, and the anode flat layer are sequentially laminated in a direction close to the anode layer;
the anode flat layer is provided with a conductive hole communicated with the anode signal wire, and the anode layer is electrically connected with the anode signal wire through the conductive hole.
9. A method for manufacturing a display panel, the method comprising:
providing a backing layer;
forming an anode layer on one side of the underlayer, and forming a first groove on the surface of the anode layer facing away from the underlayer;
forming a pixel definition layer on one side of the anode layer, which is away from the underlayer, wherein the pixel definition layer is provided with a plurality of pixel openings which are arranged in an array, at least part of the pixel openings are peep-proof pixel openings, a first groove is formed in the surface of the anode layer exposed by the peep-proof pixel openings, the surface is provided with a flat part and a slope part, the flat part is perpendicular to a preset direction, the slope part is obliquely arranged relative to the preset direction, and the preset direction is the lamination direction of the underlayer, the anode layer and the pixel definition layer;
forming a light-emitting layer in the pixel opening, wherein part of the light-emitting layer is arranged in the first groove, and the light beam output by the light-emitting layer positioned at the flat part has a first color deviation, the light beam output by the light-emitting layer positioned at the slope part has a second color deviation, and the first color deviation is smaller than the second color deviation;
forming an optical optimization on one side of the light-emitting layer away from the anode layer; the light beam output by the light emitting layer positioned at the flat part has a first incidence angle at the optical optimization layer, and the light beam output by the light emitting layer positioned at the slope part has a second incidence angle at the optical optimization layer, wherein the first incidence angle is smaller than the second incidence angle.
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| CN114141828B (en) * | 2021-11-17 | 2024-02-06 | 深圳市华星光电半导体显示技术有限公司 | Display panel, manufacturing method of display panel and display device |
| CN115696981A (en) * | 2022-11-15 | 2023-02-03 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN115915812A (en) * | 2022-11-18 | 2023-04-04 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN115942772A (en) * | 2022-11-22 | 2023-04-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN116261353B (en) * | 2022-12-27 | 2024-04-12 | 惠科股份有限公司 | Display panel and display device |
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