CN113380862A - Display panel and preparation method thereof - Google Patents

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. The flat part is perpendicular to the preset direction, and the slope part is obliquely arranged relative to the preset direction. The light beam output by the light emitting layer positioned on the flat part has a first color deviation, the light beam output by the light emitting layer positioned on the slope part has a second color deviation, and 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 favorably improved.

Description

Display panel and preparation method thereof

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 mounted on electronic devices such as mobile phone terminals and notebook computers are gradually developing in a wide viewing angle direction, and users hope to avoid screen information leakage while enjoying visual experience brought by a large viewing angle, so that commercial confidentiality and personal privacy are effectively protected.

At present, a Display screen applying a Display technology such as LCD (Liquid Crystal Display) generally adjusts a visual angle of the Display screen by actively driving Liquid Crystal, which inevitably results in a complicated Display control process of the Display screen and is not suitable for a Display screen applying an OLED (Organic Light Emitting Diode) Display technology.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a method for manufacturing the same, which can achieve the anti-peeping 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 an underlying layer. The display panel also comprises an anode layer arranged on one side of the lower lining layer. The display panel also comprises a pixel defining layer, the pixel defining layer is arranged on one side of the anode layer, which is far away from the lower lining layer, the pixel defining layer is provided with a plurality of pixel openings which are arranged in an array mode, 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 vertical to the preset direction, the slope part is arranged in an inclined mode relative to the preset direction, and the preset direction is the stacking direction of the lower lining layer, the anode layer and the pixel defining layer. The display panel also comprises a light-emitting layer which is arranged in the pixel opening, wherein light beams output by the light-emitting layer positioned on the flat part have first color deviation, and light beams output by the light-emitting layer positioned on the slope part have 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 optically optimized layer, the optically optimized layer is disposed on a side of the light emitting layer away from the anode layer; the light beam output by the light emitting layer positioned on the flat part has a first incident angle on the optical optimization layer, and the light beam output by the light emitting layer positioned on the slope part has a second incident angle on the optical optimization layer, wherein the first incident angle is smaller than the second incident angle.

In an embodiment of the present invention, the slope is inclined at an angle of 30 ° to 70 ° with respect to the predetermined direction.

In an embodiment of the invention, the peep-proof sub-pixel is defined by the peep-proof pixel opening, the regular sub-pixels are defined by the other pixel openings except the peep-proof pixel opening, and the surface of the anode layer exposed by the pixel opening of the regular 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 region includes a first edge region, a second edge region and a corner region, the first edge region extends along a first direction, the second edge region extends along a second direction, and the first edge region and the second edge region are connected by the corner region, 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 region, 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 of the first groove of the third sub-pixel extends towards the second edge area.

In an embodiment of the invention, the extending directions of the first grooves of the third sub-pixels are respectively inclined to the first direction and the second direction; the number of the third sub-pixels is multiple; 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 invention, the number of the peep-proof sub-pixels is plural; the number of the first grooves in each peep-proof sub-pixel is gradually reduced along the direction far away from the outer edge.

In one embodiment of the present invention, the underlayer comprises an anode planarization layer; the surface of the anode flat layer facing the anode layer is provided with a second groove, and the anode layer is embedded with the anode flat layer in a concave-convex mode, so that the surface of the anode layer departing from the anode flat layer forms a first groove.

In an embodiment of the present invention, the underlayer further includes a base layer and an anode signal line; the base layer, the anode signal line and the anode flat layer are sequentially stacked along the direction close to the anode layer; the anode flat layer is provided with a conductive hole communicated to 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 problem, the invention adopts another technical scheme that: a method for manufacturing a display panel is provided. The preparation method comprises the following steps: providing an underlayer; forming an anode layer on one side of the lower lining layer, and forming a first groove on the surface of the anode layer, which is far away from the lower lining layer; forming a pixel defining layer on one side of the anode layer, which is far away from the lower lining layer, wherein the pixel defining layer is provided with a plurality of pixel openings which are arranged in an array mode, at least part of the pixel openings are peep-proof pixel openings, a first groove is formed in the surface, exposed out of the peep-proof pixel openings, of the anode layer, the surface is provided with a flat portion and a slope portion, the flat portion is perpendicular to the preset direction, the slope portion is obliquely arranged relative to the preset direction, and the preset direction is the stacking direction of the lower lining layer, the anode layer and the pixel defining layer; and forming a light emitting layer in the pixel opening, wherein the light emitting layer at the flat part outputs a light beam with a first color deviation, and the light emitting layer at the slope part outputs a light beam with a second color deviation, and the first color deviation is smaller than the second color deviation.

The invention has the beneficial effects that: 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 portion is perpendicular to the predetermined direction, and the slope portion is disposed in an inclined manner with respect to the predetermined direction, so that the first color deviation is smaller than the second color deviation, that is, the color deviation of the light beam output by the light emitting layer located on the slope portion is severe. Therefore, after the light beams output by the light emitting layer positioned on the flat part and the light beams output by the light emitting layer positioned on the slope part are laterally overlapped, the finally presented lateral picture has certain color cast so as to achieve the effect of preventing lateral peeping, thereby realizing the peeping prevention function of the display panel.

In addition, the first groove is arranged on the surface of the anode layer, so that the surface area of the anode layer is increased, namely the contact area between the anode layer and the light-emitting layer is increased, and the improvement of the luminous brightness of the light-emitting layer, namely the improvement of the brightness of the display panel, is facilitated.

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 a first embodiment of the present invention;

FIG. 2 is a schematic view of the display panel anti-peeping principle of the present invention;

FIG. 3 is a schematic structural diagram of a display panel according to a second embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first sub-pixel according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a second sub-pixel according to an embodiment of the present invention;

FIGS. 6a-6b are schematic structural diagrams illustrating a third sub-pixel according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a pixel group P1 in the display panel shown in FIG. 3;

FIG. 8 is a schematic structural diagram of a pixel group P2 in the display panel shown in FIG. 3;

FIG. 9 is a schematic structural diagram of a pixel group P3 in the display panel shown in FIG. 3;

FIG. 10 is a schematic structural diagram of a display panel according to a third embodiment of the present invention;

FIG. 11 is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present invention.

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 described below and the features of the embodiments can 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 an underlying layer. The display panel also comprises an anode layer arranged on one side of the lower lining layer. The display panel also comprises a pixel defining layer, the pixel defining layer is arranged on one side of the anode layer, which is far away from the lower lining layer, the pixel defining layer is provided with a plurality of pixel openings which are arranged in an array mode, 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 vertical to the preset direction, the slope part is arranged in an inclined mode relative to the preset direction, and the preset direction is the stacking direction of the lower lining layer, the anode layer and the pixel defining layer. The display panel also comprises a light-emitting layer which is arranged in the pixel opening, wherein light beams output by the light-emitting layer positioned on the flat part have first color deviation, and light beams output by the light-emitting layer positioned on the slope part have second color deviation, wherein the first color deviation is smaller than the second color deviation. As described in detail 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 LCD display technology is not suitable for the display panel of this embodiment in a manner of actively driving liquid crystal to adjust the visual angle. In other words, the present embodiment is directed to providing a privacy design suitable for OLED display technology.

The display panel includes anunderlying layer 10 and ananode layer 20, and theanode layer 20 is disposed on one side of theunderlying layer 10. Theunderlayer 10 is a collection of underlayer layers below theanode layer 20, and theunderlayer 10 may include a buffer layer, an array layer, a planarization layer, and the like. Theanode layer 20 is used for providing an anode signal to drive the display panel to emit light, wherein theanode layer 20 is electrically connected to an anode signal line in theunderlying layer 10, which will be described in detail below.

The display panel further comprises apixel defining layer 30, thepixel defining layer 30 being arranged on a side of theanode layer 20 facing away from theunderlying layer 10. Thepixel defining layer 30 has a plurality ofpixel openings 31 arranged in an array to define a plurality of sub-pixels arranged in an array. Usually, apixel aperture 31 defines a sub-pixel, and sub-pixels with different emission colors form a whole pixel unit, for example, three sub-pixels with emission colors of red, green and blue form a whole pixel unit.

The display panel further includes alight emitting layer 40. Thepixel opening 31 exposes theanode layer 20, and thelight emitting layer 40 is disposed on theanode layer 20 in the pixel opening 31, such that thelight emitting layer 40 can contact with theanode layer 20 to form an electrical connection. The anode signal provided by theanode layer 20 is input into the light-emittinglayer 40 to drive the light-emittinglayer 40 to emit light, and further drive the display panel to emit light for display.

At least part of the plurality ofpixel openings 31 of thepixel defining layer 30 is a peep-proof pixel opening, and the surface of theanode layer 20 exposed by the peep-proof pixel opening is provided with afirst groove 21, so that the surface of theanode layer 20 exposed by the peep-proof pixel opening has aflat portion 22 and aslope portion 23. Theflat portion 22 is perpendicular to the predetermined direction (as indicated by an arrow Z in fig. 1, the same applies hereinafter), and theslope portion 23 is disposed obliquely to the predetermined direction. The predetermined direction is a stacking direction of theunderlayer 10, theanode layer 20, and thepixel defining layer 30, that is, theunderlayer 10, theanode layer 20, and thepixel defining layer 30 are sequentially stacked along the predetermined direction.

Specifically, the side wall of thefirst groove 21 is aslope 23, and the bottom of thefirst groove 21 and/or the surface of theanode layer 20 outside thefirst groove 21 is a flat 22. Fig. 1 shows that the groove bottom of thefirst groove 21 is a plane, so that the groove bottom of thefirst groove 21 and the surface of theanode layer 20 outside thefirst groove 21 in fig. 1 are bothflat portions 22. In the case where the groove bottom of thefirst groove 21 is not a plane and the surface of theanode layer 20 outside thefirst groove 21 is a plane, only the surface of theanode layer 20 outside thefirst groove 21 is aflat portion 22. In the case where the surface of theanode layer 20 outside thefirst grooves 21 is not a plane and the groove bottoms of thefirst grooves 21 are planes, only the groove bottoms of thefirst grooves 21 areflat portions 22.

Thelight emitting layer 40 located at theflat portion 22 outputs a light beam having a different propagation direction from thelight emitting layer 40 located at the slopedportion 23. The light beam outputted from the light-emittinglayer 40 located at theslope portion 23 is laterally overlapped with the light beam outputted from the light-emittinglayer 40 located at theflat portion 22. The light beam output from thelight emitting layer 40 located on theflat portion 22 has a first color shift, and the light beam output from thelight emitting layer 40 located on theslope 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 output by thelight emitting layer 40 located at theflat portion 22 and the light beam output by thelight emitting layer 40 located at theslope 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. Namely, the side direction picture of the display panel has a certain degree of color cast, which deteriorates the display effect of the side direction viewing angle of the display panel, thereby preventing others from peeping the display content from the side direction of the display panel by using the side direction picture, and realizing the peep-proof function of the display panel.

Referring to fig. 2, the normal O is parallel to the predetermined direction, and the angle between the light emitted from the right side of the normal O and the normal O is positive, and the angle between the light emitted from the left side of the normal O and the normal O is negative. The maximum exit angles of the light beams output from the light-emittinglayer 40 located at theflat portion 22 are-theta and + theta, and the minimum exit angles of the light beams output from the light-emittinglayer 40 located at the slopingportion 23 are-lambda and + lambda. The light beam output by thelight emitting layer 40 located on theflat portion 22 and the light beam output by thelight emitting layer 40 located on theslope portion 23 are overlapped in the viewing angle range of-theta to-lambda and + lambda to + theta to generate the color cast frame M, so as to achieve the anti-peeping effect, and the user can still view the normal frame in the viewing angle range of-lambda to + lambda.

The degree of color shift is defined as the degree of difference between the color of the light beam output from the light-emittinglayer 40 and the theoretical color. The larger the color shift is, the larger the difference between the color of the light beam output by the light-emittinglayer 40 and the theoretical color is; the smaller the degree of color shift, the smaller the difference between the color of the light beam output from the light-emittinglayer 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 outputted from the light-emittinglayer 40 located at theflat portion 22 and the theoretical color is smaller than the difference between the color of the light beam outputted from the light-emittinglayer 40 located at theslope portion 23 and the theoretical color.

Moreover, thefirst groove 21 is formed in the surface of theanode layer 20, so that the surface area of theanode layer 20 is increased, that is, the contact area between theanode layer 20 and the light-emittinglayer 40 is increased, which is beneficial to improving the luminance of the light-emittinglayer 40, that is, the luminance of the display panel. The display panel is usually designed with an HBM (High Brightness Monitor) mode, and the present embodiment increases the contact area between theanode layer 20 and thelight emitting layer 40, so as to meet the requirement of the HBM mode of the display panel for Brightness.

Please continue to refer to fig. 1. In one embodiment, the display panel further includes an optically optimizedlayer 50, and the optically optimizedlayer 50 is disposed on a side of the light emitting layer facing away from theanode layer 20. The light-emitting layer is made of an electroluminescent material and is used for realizing the light-emitting function of the light-emittinglayer 40. Theoptical 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 output by the light emitting layer.

Specifically, the optically optimizedlayer 50 may include an optical modulation layer, a material protection layer, and the like. The optical modulation layer can be made of acrylic, epoxy resin or polyimide and the like, and the material protection layer can be made of lithium fluoride and the like. As for the optical modulation layer and the material protection layer, the specific optical modulation principle belongs to the understanding scope of those skilled in the art, and will not be described herein.

In the conventional display panel, the optically optimizedlayer 50 optimizes the color point, color temperature, purity, etc., and the light beams output by the light-emittinglayer 40 are modulated by the optically optimizedlayer 50 to interfere and scatter, so that the conventional display panel has a larger visual angle. The optically optimizedlayer 50 requires a normal incidence or small angle of incidence of the light beam in order to properly modulate the light beam. If the incident angle of the light beam is large, the light beam modulated by theoptical optimization layer 50 may have a serious color shift problem.

In view of this, the present embodiment utilizes the requirement of the optically optimizedlayer 50 for the incident angle of the incident light to realize the anti-peeping function of the display panel. Specifically, the light beam output by the light-emittinglayer 40 located on theflat portion 22 has a first incident angle α in the optically optimizedlayer 50, wherein the first incident angle α is smaller, which means that the light beam output by the light-emittinglayer 40 located on theflat portion 22 is vertically incident or is deviated from a smaller angle of incidence; the light beam output by thelight emitting layer 40 located on theslope portion 23 has a second incident angle β on theoptical optimization layer 50, wherein the first incident angle α is smaller than the second incident angle β, that is, the second incident angle β is larger, which means that the incident angle of the light beam output by thelight emitting layer 40 located on theslope portion 23 is larger, so that the light beam output by thelight emitting layer 40 located on theslope portion 23 is subjected to a more severe color shift after passing through theoptical optimization layer 50, and further, the first color shift is smaller than the second color shift.

The light beam output from the light-emittinglayer 40 at theflat portion 22 has a smaller degree of color shift after being modulated by the optically optimizedlayer 50, even without the problem of color shift.

Please continue to refer to fig. 1. In one embodiment, the inclination of theslope 23 affects the viewing angle of the display panel, i.e. the viewing angle ranges from- θ to- λ and + λ to + θ. The inclination angle δ of theslope 23 with respect to the predetermined direction determines the value of λ. Specifically, the larger the inclination angle δ of theslope portion 23 with respect to the predetermined direction, the smaller the value of λ, the larger the viewing angle range in which the color shift screen is formed, and the smaller the inclination angle δ of theslope portion 23 with respect to the predetermined direction, and the larger the value of λ, the smaller the viewing angle range in which the color shift screen is formed.

The inclination angle δ of theslope 23 relative to the predetermined direction can be selected reasonably according to the requirement of different display panel products on the size of the peep-proof viewing angle. Alternatively, theslope 23 may be inclined at an angle δ of 30 ° to 70 ° with respect to the predetermined direction such that λ takes a value of 15 ° to 45 °, i.e., a viewing angle range in which the user can view a normal screen is ± 15 ° to ± 45 °. For example, when the inclination angle δ of theslope portion 23 with respect to the predetermined direction is 30 °, λ is 45 °, that is, the viewing angle range at which the user can view a normal picture is-45 ° to +45 °; when the inclination angle δ of theslope 23 with respect to the predetermined direction is 70 °, λ is 15 °, that is, the viewing angle range at which the user can view a normal picture is-15 ° to +15 °.

It should be noted that the inclination angle δ of theslope 23 with respect to the predetermined direction can be adjusted by adjusting the depth and width of thefirst groove 21.

Referring to fig. 1 and fig. 3, fig. 3 is a schematic structural diagram of a display panel according to a second embodiment of the invention.

In an embodiment, the display panel is divided into a display area a, the display area a is an area where the display panel emits light for display, and the plurality of sub-pixels arranged in an array 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-proof sub-pixel 61 and aregular sub-pixel 62, the peep-proof pixel opening defines the peep-proof sub-pixel 61, and the other pixel openings except the peep-proof pixel opening define theregular sub-pixel 62. The surface of theanode layer 20 exposed by thepixel opening 31 of theanti-peep sub-pixel 61 is provided with afirst groove 21, and the surface of theanode layer 20 exposed by thepixel opening 31 of theregular sub-pixel 62 is a plane, that is, the surface of theanode layer 20 exposed by thepixel opening 31 of theregular sub-pixel 62 is not provided with thefirst groove 21. In short, the peep prevention sub-pixel 61 functions not only in the conventional light emitting display but also in the peep prevention, while theconventional sub-pixel 62 functions only in the conventional light emitting display.

Since the display content of the display panel is usually peeped from the side of the display panel by others, that is, others peep into the display content of the display panel from the side of the display panel, the peep-proof requirement of the sub-pixels closer to theouter edge 70 of the display area a is higher, and the peep-proof requirement of the sub-pixels closer to the middle part of the display area a is lower. In view of this, the peep-proof sub-pixel 61 in the embodiment is closer to theouter edge 70 of the display area a than theconventional 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 remains the conventional pixel design, which is beneficial to simplifying the production process of the display panel.

Further, theouter edge 70 of the display area a includes afirst edge area 71, asecond edge area 72, and acorner area 73. Thefirst edge region 71 extends in a first direction (indicated by arrow X in fig. 3, the same below), thesecond edge region 72 extends in a second direction (indicated by arrow Y in fig. 3, the same below), and thefirst edge region 71 and thesecond edge region 72 are connected by acorner 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. Thefirst edge region 71 extends in the first direction and thesecond edge region 72 extends in the second direction, but thefirst edge region 71 does not need to extend in the first direction and thesecond edge region 72 does not need to extend in the second direction, and the extending direction of thefirst edge region 71 is allowed to be at an angle with respect to the first direction and the extending direction of thesecond edge region 72 is allowed to be at an angle with respect to the second direction.

Theanti-peeping sub-pixel 61 includes afirst sub-pixel 611, asecond sub-pixel 612 and athird sub-pixel 613.

Thefirst sub-pixel 611 is disposed near thefirst edge area 71, and thefirst groove 21 of thefirst sub-pixel 611 extends along the first direction, as shown in fig. 4, so as to prevent others from peeping at the position of thefirst edge area 71 along the second direction. Thesecond sub-pixel 612 is disposed near thesecond edge region 72, and thefirst groove 21 of thesecond sub-pixel 612 extends along the second direction, as shown in fig. 5, so as to prevent others from peeping at the position of thesecond edge region 72 along the first direction to display contents of the display panel. Thethird sub-pixel 613 is disposed near thecorner region 73, and one end of thefirst groove 21 of thethird sub-pixel 613 extends toward thefirst edge region 71, and the other end extends toward thesecond edge region 72, as shown in fig. 6a-6b, so as to prevent others from peeping at the display content of the display panel along the diagonal direction at the position of thecorner region 73.

Wherein thefirst groove 21 of thethird 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, thefirst groove 21 of thethird sub-pixel 613 may also extend along a curve, which is not limited herein.

For example, theouter edge 70 of the display area a has a rectangular-like shape, and has two oppositefirst edge regions 71 and two oppositesecond edge regions 72, and adjacentfirst edge regions 71 andsecond edge regions 72 are connected bycorner regions 73. Theouter edge 70 of the display area a has acorner area 73 at upper right, lower right, upper left and lower left positions, respectively. The extending directions of thefirst grooves 21 of the third sub-pixels 613 in fig. 6a and 6b are different, the third sub-pixels 613 shown in fig. 6a are located in thecorner areas 73 at the upper right and left positions, and the third sub-pixels 613 shown in fig. 6b are located in thecorner areas 73 at the upper right and left positions.

Further, the extending directions of thefirst grooves 21 of thethird sub-pixel 613 are respectively disposed obliquely with respect to the first direction and the second direction, and thefirst grooves 21 of thethird sub-pixel 613 may extend in a straight line direction. The number of thethird sub-pixels 613 of thecorner region 73 is plural. If the extending directions of thefirst grooves 21 of the adjacent third sub-pixels 613 are different, the display effect of the adjacent third sub-pixels 613 is different, wherein the larger the difference of the extending directions of thefirst grooves 21 of the adjacent third sub-pixels 613 is, the larger the difference of the display effect of the adjacent third sub-pixels 613 is, and vice versa.

In view of this, the inclination angle of thefirst groove 21 of eachthird sub-pixel 613 with respect to the first direction is gradually decreased along the direction close to thefirst edge area 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 effect of the adjacent third sub-pixels 613 on the overall display effect of the display panel is avoided. Fig. 7 shows a case where the inclination angle of thefirst groove 21 of eachthird sub-pixel 613 with respect to the first direction is decreased one by one in a direction approaching thefirst edge area 71.

Moreover, the inclination angle of thefirst groove 21 of eachthird sub-pixel 613 with respect to the second direction is gradually reduced along the direction close to thesecond 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 effect of the adjacent third sub-pixels 613 on the overall display effect of the display panel is avoided. Fig. 8 shows a case that the inclination angle of thefirst groove 21 of eachthird sub-pixel 613 with respect to the second direction is gradually decreased along a direction approaching thesecond edge region 72.

Of course, the number of thefirst sub-pixel 611 and thesecond sub-pixel 612 may also be multiple, and is not limited herein.

Please refer to FIG. 9. In one embodiment, the larger the number of thefirst grooves 21 of theanti-peeping sub-pixel 61, the better the anti-peeping effect thereof. If the number of thefirst grooves 21 of the adjacent peep-proof sub-pixels 61 is different, the display effect of the adjacent peep-proof sub-pixels 61 is different, wherein the larger the difference of the number of thefirst grooves 21 of the adjacent peep-proof sub-pixels 61 is, the larger the difference of the display effect of the adjacent peep-proof sub-pixels 61 is, and vice versa.

In view of this, the number of thefirst grooves 21 in eachanti-peeping sub-pixel 61 is gradually reduced along the direction away from theouter edge 70 of the display area a, so that the difference of the display effects of the adjacent anti-peeping sub-pixels 61 can be well transited, the anti-peeping sub-pixels 61 gradually approach the display effect of theconventional sub-pixel 62, and the adverse effect of the abrupt change of the display effect of the adjacent anti-peeping sub-pixels 61 on the whole display effect of the display panel is avoided.

Please continue to refer to fig. 1. In one embodiment, theunderlying layer 10 includes an anode planarization layer 11. The surface of the anode flat layer 11 facing theanode layer 20 is provided withsecond grooves 12, so that the surface of the anode flat layer 11 facing theanode layer 20 presents an uneven surface topography. Theanode layer 20 is manufactured on the uneven surface of the anode flat layer 11, and the thickness of each position of theanode layer 20 is uniform, so that theanode layer 20 is embedded with the anode flat layer 11 in an uneven manner, afirst groove 21 is formed on the surface of theanode layer 20 departing from the anode flat layer 11, and particularly thefirst groove 21 is embedded into thesecond groove 12.

The inclination angle of theslope 23 with respect to the predetermined direction is adjusted by adjusting the depth and width of thefirst groove 21, specifically, by adjusting the depth and width of thesecond groove 12.

Alternatively, the depth of thesecond groove 12 may be 0.2 μm to 0.5 μm, and the width of thesecond groove 12 may be 5 μm to 10 μm. Theslope 23 is inclined at an angle of 30 ° to 70 ° as described above with respect to the predetermined direction by matching the depth and width of thesecond groove 12. Wherein the depth of thesecond groove 12 is about 12% of the total thickness of the anode planarization layer 11.

The depth and width of thesecond groove 12 are designed differently, and have different effects on the inclination angle of theslope 23 with respect to the predetermined direction and the contact area between theanode layer 20 and thelight emitting layer 40. The difficulty of the manufacturing process of the anode flat layer 11 can be reasonably selected according to the requirements of different display panel products on the peep-proof visual angle range and the brightness.

Further, referring to fig. 10, theunderlayer 10 further includes abase layer 13 and ananode signal line 14. Thebase layer 13, theanode signal line 14, and the anode planarization layer 11 are sequentially stacked in a direction close to theanode layer 20. Thebase layer 13 is defined as a set of lower film layers of theanode signal line 14, including, for example, a buffer layer, an array layer, and the like.

The anode flat layer 11 is provided with aconductive hole 15 communicating to theanode signal line 14, and theanode layer 20 is electrically connected to theanode signal line 14 through theconductive hole 15. Specifically, when theanode layer 20 is formed on the anode planarization layer 11, theanode layer 20 is formed in theconductive hole 15, so that theanode layer 20 is electrically connected to theanode signal line 14. Theanode signal line 14 is used for providing an anode signal to theanode layer 20 to drive the display panel to emit light for display.

As shown in fig. 10, the orthographic projection of theanode signal line 14 on thebase layer 13 is located on the side of the orthographic projection of thepixel opening 31 on thebase layer 13.

Referring to fig. 1 and fig. 11, fig. 11 is a schematic flow chart illustrating a manufacturing method of a display panel according to an embodiment of the invention. The method for manufacturing the display panel described in this embodiment is based on the display panel described in the above embodiment.

S101: providing an underlayer;

in this embodiment, theunderlying layer 10 may be manufactured in advance by other manufacturing processes, or theunderlying layer 10 may be directly purchased and applied to the manufacturing process of the display panel of this embodiment.

S102: forming an anode layer on one side of the lower lining layer, and forming a first groove on the surface of the anode layer, which is far away from the lower lining layer;

in this embodiment, under thelinerThe anode layer 20 is formed on one side of thelayer 10, and the specific process of forming thefirst groove 21 on the surface of theanode layer 20 facing away from theunderlying layer 10 may be: forminganode signal lines 14 on thebase layer 13, forming an anode planarization layer 11 to cover theanode signal lines 14, formingconductive holes 15 in the anode planarization layer 11, and performing oxygen plasma ashing (O)₂ashing) to form asecond groove 12, and then forming ananode layer 20 on the anode planarization layer 11 and in the conductive via 15, wherein a portion of theanode layer 20 embedded in thesecond groove 12 forms afirst groove 21.

S103: forming a pixel defining layer on a side of the anode layer facing away from the underlying layer;

in the present embodiment, apixel defining layer 30 is formed on a side of theanode layer 20 facing away from theunderlying layer 10 to define a forming region of the sub-pixel on the display panel. Thepixel opening 31 of thepixel defining layer 30 exposes thefirst recess 21 on the surface of theanode layer 20.

S104: forming a light emitting layer in the pixel opening;

in the present embodiment, thelight emitting layer 40 is formed on theanode layer 20 in thepixel opening 31, and thelight emitting layer 40 covers thefirst groove 21 and the surface of theanode layer 20 outside thefirst groove 21, so that part of thelight emitting layer 40 is located on theflat portion 22 and part of thelight emitting layer 40 is located on theslope portion 23. The anode signal of theanode signal line 14 is transmitted to thelight emitting layer 40 through theanode layer 20 to drive thelight emitting layer 40 to emit light.

The following table shows the materials and the processing processes of the films of the display panel of this embodiment:

film layer	Main material of	Process for manufacturing semiconductor device
			Luminescent layer	Organic light emitting semiconductor	Evaporation plating process
Pixel definition layer	Polyacrylates	Photoetching process
			Anode layer	ITO/Ag/ITO	Photoetching process and etching process
Anode flat layer	Polyacrylates	Ashing process and photoetching process
			Anode signal line	Ti/Al/Ti	Photoetching process and etching process

In addition, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A display panel, comprising:

an underlayer;

an anode layer disposed on one side of the lower liner layer;

the pixel defining layer is arranged on one side, away from the lower lining layer, of the anode layer and provided with a plurality of pixel openings which are arranged in an array mode, 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 vertical to a preset direction, the slope part is obliquely arranged relative to the preset direction, and the preset direction is the stacking direction of the lower lining layer, the anode layer and the pixel defining layer;

and the light emitting layer is arranged in the pixel opening, the light beam output by the light emitting layer positioned on the flat part has a first color deviation, and the light beam output by the light emitting layer positioned on the slope part has a second color deviation, wherein the first color deviation is smaller than the second color deviation.

2. The display panel according to claim 1,

the display panel further comprises an optical optimization layer, and the optical optimization layer is arranged on one side, away from the anode layer, of the light emitting layer;

the light beam output by the light emitting layer positioned on the flat part has a first incident angle on the optical optimization layer, and the light beam output by the light emitting layer positioned on the slope part has a second incident angle on the optical optimization layer, wherein the first incident angle is smaller than the second incident angle.

3. The display panel according to claim 1 or 2, wherein the slope is inclined at an angle of 30 ° to 70 ° with respect to the predetermined direction.

4. The display panel according to claim 1 or 2,

the peep-proof sub-pixels are defined by the peep-proof pixel openings, the conventional sub-pixels are defined by the other pixel openings except the peep-proof pixel openings, and the surface of the anode layer exposed by the pixel openings of the conventional sub-pixels is a plane;

the display panel is divided into display areas, and the peep-proof sub-pixels are close to the outer edges of the display areas relative to the conventional sub-pixels.

5. The display panel according to claim 4,

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, and 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 a first groove of the first sub-pixel extends along the first direction;

the second sub-pixel is arranged close to the second edge region, 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 of the first groove of the third sub-pixel extends towards the second edge area.

6. The display panel according to claim 5,

the extending directions of the first grooves of the third sub-pixels are respectively inclined relative to the first direction and the second direction;

the number of the third sub-pixels is multiple;

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 region, 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 region.

7. The display panel according to claim 4,

the number of the peep-proof sub-pixels is multiple;

the number of the first grooves in each peep-proof sub-pixel is gradually reduced along the direction far away from the outer edge.

8. The display panel according to claim 1 or 2,

the underlayer comprises an anode planarization layer;

the anode layer and the anode flat layer are in concave-convex embedding, so that the first groove is formed on the surface of the anode layer, which is deviated from the anode flat layer.

9. The display panel according to claim 8,

the lower lining 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 stacked along a direction close to the anode layer;

the anode flat layer is provided with a conductive hole communicated to the anode signal line, and the anode layer is electrically connected with the anode signal line through the conductive hole.

10. A method for manufacturing a display panel, the method comprising:

providing an underlayer;

forming an anode layer on one side of the lower lining layer, and forming a first groove on the surface of the anode layer, which is far away from the lower lining layer;

forming a pixel defining layer on one side of the anode layer, which is far away from the lower lining layer, wherein the pixel defining layer is provided with a plurality of pixel openings which are arranged in an array mode, 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 stacking direction of the lower lining layer, the anode layer and the pixel defining layer;

and forming a light emitting layer in the pixel opening, wherein the light emitting layer positioned on the flat part outputs a light beam with a first color deviation, and the light emitting layer positioned on the slope part outputs a light beam with a second color deviation, and the first color deviation is smaller than the second color deviation.

Images