CN110164938B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN110164938B CN110164938B CN201910465216.8A CN201910465216A CN110164938B CN 110164938 B CN110164938 B CN 110164938B CN 201910465216 A CN201910465216 A CN 201910465216A CN 110164938 B CN110164938 B CN 110164938B
- Authority
- CN
- China
- Prior art keywords
- pixel
- sub
- display panel
- display
- display area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
Abstract
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a display area, the display area comprises a plurality of sub-pixels defined by a pixel definition structure, and because the slope angle of the pixel definition structure is gradually reduced in the sub-pixels of at least one color from the center position of the display area to the boundary of the display area, the light-emitting efficiency of an organic light-emitting material in an opening area close to the boundary of the display area is higher, the problem of more brightness attenuation under a large viewing angle of the boundary of the display area is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
With the development of display technology, display panels, such as liquid crystal display panels, organic light emitting display panels, electronic paper display panels, and the like, are increasingly used. The Organic Light Emitting display panel includes an Organic Light Emitting Diode (OLED) display panel, and the OLED display panel has advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, and high response speed. In addition, the organic light emitting display panel can be manufactured as a flexible display panel, which is easily bent.
When the organic light emitting display panel is in a bent state, the viewing angle of an observer may be changed accordingly. Wherein the viewing angle of the observer is the angle between the line of sight of the observer and the normal of the display surface. When the organic light emitting display panel is in a bent state at a position, a viewing angle at the position is significantly increased.
In the prior art, for an organic light emitting display panel with a curved edge, the viewing angle of the edge position of the organic light emitting display panel is a large viewing angle. However, the luminance of the organic light emitting material in the organic light emitting display panel is attenuated under a large viewing angle, and the luminance is attenuated more when the viewing angle is larger. Due to the difference of the performances of the light with different colors, the brightness of the light emitted by the pixels with different colors is different under a large viewing angle, so that the brightness difference exists between the sub-pixels with different colors of the organic light-emitting display panel under the large viewing angle, and the color cast phenomenon of the display panel is caused. Generally, the organic light emitting display panel includes red, green, and blue sub-pixels, and the luminance attenuation of the blue sub-pixel is small under a large viewing angle, so that the organic light emitting display panel emits blue on a picture under the large viewing angle, and when the viewing angle of the organic light emitting display panel is significantly increased under a curved state, the blue phenomenon on the picture is more serious, and the display quality of the organic light emitting display panel is reduced.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel and a display device, which reduce the brightness attenuation at a large viewing angle and reduce the color shift phenomenon, thereby improving the display quality of the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a display area including a plurality of pixels; the pixel comprises a plurality of sub-pixels of different colors;
the pixel structure comprises a substrate base plate and a pixel defining layer positioned on the substrate base plate;
the pixel definition layer comprises a plurality of pixel definition structures, wherein opening regions are arranged among the pixel definition structures, the opening regions define the sub-pixels, and organic light-emitting materials are arranged in the opening regions;
along a first direction, the gradient angle of the sub-pixel of at least one color corresponding to at least part of the pixel defining structure is gradually reduced;
the first direction is a direction from the center of the display area to the boundary of the display area.
Optionally, for the sub-pixels of the same color, the slope angle of the pixel defining structure corresponding to the sub-pixel gradually decreases along the first direction.
Optionally, the pixel comprises at least a red sub-pixel, a green sub-pixel and a blue sub-pixel;
for one pixel, the slope angle of the pixel defining structure corresponding to the red sub-pixel is α, the slope angle of the pixel defining structure corresponding to the green sub-pixel is β, and the slope angle of the pixel defining structure corresponding to the blue sub-pixel is γ, wherein,
in at least some of the pixels, β > α, and β > γ for the same pixel.
Optionally, in the same said pixel, β > α > γ.
Optionally, along the first direction, the slope angle of the sub-pixel of at least one color, corresponding to at least a portion of the pixel defining structure, on a side away from the center position of the display area is gradually decreased.
Optionally, the pixel defining structure has a slope angle of less than 30 °.
Optionally, in the first direction, in an area from a preset position on the display panel to the display area boundary, the slope angle of the pixel definition structure corresponding to the sub-pixel of at least one color is gradually decreased; wherein the content of the first and second substances,
the distance from the preset position to the boundary of the display area is greater than or equal to 6 mm.
Optionally, the preset position is a central position of the display area.
Optionally, an area from the center of the display area to the preset position is a first area, and an area from the preset position to the display area boundary is a second area, wherein a slope angle of the pixel definition structure corresponding to the sub-pixel located in the first area is greater than or equal to a slope angle of the pixel definition structure corresponding to the sub-pixel located in the second area.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
According to the light-emitting display panel and the display device provided by the embodiment of the invention, the display panel comprises the display area, the display area comprises a plurality of sub-pixels defined by the pixel definition structure, and because the slope angle of the pixel definition structure is gradually reduced in the sub-pixels of at least one color from the center position of the display area to the boundary of the display area, the light-emitting efficiency of the organic light-emitting material in the opening area close to the boundary of the display area is higher, the problem that the brightness is more attenuated under the large viewing angle of the boundary of the display area is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved. In the embodiment of the invention, in order to achieve the purpose of increasing the light-emitting efficiency of the organic light-emitting material in the opening area close to the boundary of the display area, only the gradient angle of the pixel definition structure is changed, and the difficulty of product design and manufacturing process is not increased, so that the manufacturing process is simple and easy to realize.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel according to the related art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line C1-C2 of FIG. 2;
FIG. 4 is a cross-sectional view taken along line D1-D2 of FIG. 2;
FIG. 5 is a schematic diagram illustrating a comparison of light-emitting angles of organic light-emitting materials at different slope angles according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a slope angle variation of a display panel according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a predetermined position of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating color coordinates of a display panel at different slope angles according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of color shift of a display panel at different slope angles according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. 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 terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe regions in embodiments of the present invention, these regions should not be limited by these terms. These terms are only used to distinguish groups of pixels from each other. For example, a first region may also be referred to as a second region, and similarly, a second region may also be referred to as a first region, without departing from the scope of embodiments of the present invention.
As shown in fig. 1 to 10, fig. 1 is a schematic structural diagram of a display panel in the related art; fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention; FIG. 3 is a cross-sectional view taken along line C1-C2 of FIG. 2; FIG. 4 is a cross-sectional view taken along line D1-D3 of FIG. 2; FIG. 5 is a schematic diagram illustrating a comparison of light-emitting angles of organic light-emitting materials at different slope angles according to an embodiment of the present invention; fig. 6 is a schematic diagram illustrating a slope angle variation of a display panel according to an embodiment of the invention; FIG. 7 is a schematic diagram of a predetermined position of a display panel according to an embodiment of the present invention; FIG. 8 is a schematic diagram illustrating color coordinates of a display panel at different slope angles according to an embodiment of the present invention; FIG. 9 is a schematic diagram of color shift of a display panel at different slope angles according to an embodiment of the present invention; fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention. The embodiment of the invention provides a display panel and a display device, because the gradient angle of a pixel definition structure is gradually reduced from the central position of a display area to the boundary of the display area, the light-emitting efficiency of an organic light-emitting material in an opening area close to the boundary of the display area is higher, the problem of more brightness attenuation under a large viewing angle of the boundary of the display area is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved. In the embodiment of the invention, in order to achieve the purpose of increasing the light-emitting efficiency of the organic light-emitting material in the opening area close to the boundary of the display area, only the gradient angle of the pixel definition structure is changed, and the difficulty of product design and manufacturing process is not increased, so that the manufacturing process is simple and easy to realize.
Fig. 1 is a schematic structural diagram of a display panel in the related art, and as shown in fig. 1, a viewing angle of an observer changes correspondingly when the display panel 100 is in a bent state, where an included angle between a line of sight of the observer and a normal line of a display surface is the viewing angle. Specifically, the angle between the line of sight of the observer and the normal f1 at the position a of the display surface is θ 1, and the angle between the line of sight of the observer and the normal f2 at the position B of the display surface is θ 2. The display panel 100 is in a bent state at the position B, and the viewing angle θ 2 is significantly increased.
As shown in fig. 1, the edge of the display panel 100 (i.e., at the position B) is in a bent state, so that the viewing angle at the edge position of the display panel 100 is a large viewing angle. When the display panel 100 is an organic light emitting display panel, the luminance of the organic light emitting material in the organic light emitting display panel at a large viewing angle is attenuated, and the larger the viewing angle is, the more the luminance is attenuated. Due to the difference in performance of the light of different colors, the brightness of the light emitted by the pixels of different colors varies in a large viewing angle, so that the brightness of the organic light emitting display panel varies among the sub-pixels of different colors in the large viewing angle, thereby causing color cast. Generally, the organic light emitting display panel 100 includes red, green, and blue sub-pixels, and the luminance attenuation of the blue sub-pixel is less under a large viewing angle, so that the organic light emitting display panel emits blue in a large viewing angle.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 3 is a sectional view taken from C1-C2 in fig. 2, and fig. 4 is a sectional view taken from D1-D2 in fig. 2, as shown in fig. 2, fig. 3 and fig. 4, the display panel 200 includes a display area 1, the display area 1 includes a plurality of pixels 2, and the pixels 2 include a plurality of sub-pixels 3 with different colors.
As shown in fig. 2, 3 and 4, the display panel 200 further includes a substrate 4 and a pixel defining layer 5 on the substrate 4, the pixel defining layer 5 includes a plurality of pixel defining structures 6, an opening region 7 is disposed between the pixel defining structures 6, the opening region 7 defines a sub-pixel 3, and an organic light emitting material 8 is disposed in the opening region 7.
As shown in fig. 2, 3 and 4, the slope angle of at least a portion of the corresponding pixel defining structure 6 of the sub-pixel 3 of at least one color gradually decreases along a first direction, wherein the first direction is a direction from the central position a of the display area to the boundary b of the display area.
As shown in fig. 3 and 4, the side of the pixel defining structure 6 close to the opening region 7 is provided with a slope, and an included angle between a plane or a tangent plane of the slope and a surface of the substrate 4 close to the side of the pixel defining structure 6 is a slope angle. The slope may be a tapered surface or a curved surface, wherein the curved surface may be a curved surface protruding outward or recessed inward. If the slope is a curved surface, the slope angle is an included angle between a tangent plane of the slope and a surface of the substrate base plate 4 close to the pixel defining structure 6.
As shown in fig. 2, the center point of the display area of the display panel is a display area center position a, and the edge position of the display area of the display panel is a display area boundary b. In the embodiment of the present invention, for example: the display panel is rectangular, and the display panel has four display area boundaries b, and the directions from the display area center position a to the four display boundaries b are all the first direction. Namely: for a display panel having a rectangular shape, four first directions are provided. In practical applications, the display panel may also take other shapes, and in this case, the display panel may also have other numbers of first directions, for example: the display panel has six display boundaries b, and the display panel has six first directions at this time, which is not specifically shown.
Fig. 5 is a schematic diagram illustrating a comparison of light-emitting angles of the organic light-emitting material under different slope angles in the embodiment of the present invention, where δ 1 and δ 3 are both slope angles of the pixel definition structure 6 corresponding to the blue sub-pixel B, and δ 1 > δ 3. As shown in fig. 5, the arrow may indicate the light-emitting direction of the light-emitting light, and the included angle between two light-emitting light rays in the figure is the light-emitting angle. As can be seen from fig. 5, when the slope angle of the pixel defining structure 6 is decreased, the angle of the light exiting from the opening region 7 is increased, that is, the light exiting angle of the organic light emitting material 8 is larger, so that the light exiting efficiency of the organic light emitting material 8 is increased.
In the embodiment of the present invention, the smaller the gradient angle of the pixel defining structure 6 is, the larger the light emitting angle of the organic light emitting material 8 in the opening region 7 is, the higher the light emitting efficiency of the organic light emitting material 8 in the opening region 7 is, which is beneficial to increasing the light emitting amount of the pixel under a large viewing angle. Because the slope angle of at least part of the pixel definition structures 6 corresponding to the sub-pixels 3 of at least one color is gradually reduced from the central position a of the display area to the boundary b of the display area, the light-emitting efficiency of the organic light-emitting material 8 of the opening area 7 close to the boundary b of the display area is higher, the problem of more brightness attenuation of the boundary of the display area under a large viewing angle is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, particularly the phenomenon that a picture is bluing is weakened, and the display quality of the display panel is improved. In the embodiment of the invention, in order to achieve the purpose of increasing the light extraction efficiency of the organic light-emitting material in the opening area close to the display area boundary, only the gradient angle of the pixel definition structure 6 is changed, and the difficulty of product design and manufacturing process is not increased, so that the manufacturing process is simple and easy to realize. In the related art, the purpose of increasing the light extraction efficiency of the organic light-emitting material can be achieved by increasing the size of the sub-pixel 3 close to the boundary of the display area, but changing the size of the sub-pixel 3 close to the boundary of the display area needs to be achieved by changing manufacturing equipment, for example, changing the graphic structure on the mask plate, and the difficulty in achieving the graphic structure on the mask plate in practical application is high due to the fact that the graphic structure on the mask plate is changed according to the mode; moreover, the distance of pixel definition structures between adjacent pixels is different due to different sizes of the pixels, and the pixels with the same color are different in size, so that the problem of color mixing is easily caused during evaporation; in addition, the increase of the size of the pixels in the edge area will reduce the density of the pixels in the edge area, resulting in obvious saw tooth phenomenon during display. Therefore, compared with the related art, the scheme of the embodiment of the invention is easier to realize.
It is understood that, along the first direction, the slope angles of at least part of the pixel defining structures 6 are gradually reduced for the sub-pixels 3 of at least one color, and the sub-pixels may be sub-pixels of the same color continuously arranged in the first direction, or sub-pixels of the same color arranged at intervals in the first direction; the pixel defining structure of one color sub-pixel may be gradually decreased, or the slope angles of the pixel defining structures of two or more colors of sub-pixels may be simultaneously decreased.
It should be noted that, as shown in fig. 2, in the embodiment of the present invention, the display panel 200 further includes a non-display area 9 located at the periphery of the display area 1.
As shown in fig. 2, 3 and 4, in the embodiment of the present invention, the sub-pixel 3 includes an organic light emitting diode including an anode 10 and a cathode 11, and the organic light emitting material 8 is disposed between the anode 10 and the cathode 11. When the anode 10 and the cathode 11 are applied with corresponding voltages, respectively, holes of the anode 10 and electrons of the cathode 11 are combined in the organic light emitting material 8 to generate light. By providing the organic light emitting material 8, the organic light emitting diode emits light of different colors, even if the sub-pixels 3 emit light of different colors.
As shown in fig. 3 and 4, in the embodiment of the invention, the display panel 200 further includes a thin film transistor including a gate electrode 12, an active layer 13, a source electrode 14, and a drain electrode 15. The source electrode 14 and the drain electrode 15 are electrically connected to the active layer 13, and the drain electrode 15 is also electrically connected to the cathode 11.
As shown in fig. 3 and 4, in the embodiment of the invention, the display panel 200 further includes a buffer layer 16, the buffer layer 16 is located on one side of the substrate 2 close to the organic light emitting diode, and the active layer 13 is located on one side of the buffer layer 16 close to the organic light emitting diode.
As shown in fig. 3 and 4, in the embodiment of the present invention, the display panel 200 further includes a first insulating layer 17, a second insulating layer 18, and a third insulating layer 19. The first insulating layer 17 is located on a side of the active layer 13 away from the substrate base plate 2, the gate electrode 12 is located on a side of the first insulating layer 17 away from the substrate base plate 2, the second insulating layer 18 is located on a side of the gate electrode 12 away from the substrate base plate 2, the source electrode 14 and the drain electrode 15 are located on a side of the second insulating layer 18 away from the substrate base plate 2, the drain electrode 15 is electrically connected to the active layer 13 through a via hole provided in the first insulating layer 17 and the second insulating layer 18, the third insulating layer 19 is located on a side of the source electrode 14 and the drain electrode 15 away from the substrate base plate 2, the anode 10 is located on a side of the third insulating layer 19 away from the substrate base plate 2, the anode 10 is electrically connected to the drain electrode 15 through a via hole provided in the third insulating layer 19, the pixel defining structure 6 is located on a side of the anode 10 away from the substrate base plate 2 and located on the third insulating layer 19, and the cathode 11 is located on a side of the pixel defining structure 6 away from the substrate base plate 2.
As shown in fig. 3 and fig. 4, in the embodiment of the invention, the display panel 200 further includes an encapsulation layer 20, and the encapsulation layer 20 is located on a side of the cathode 11 away from the substrate base plate 2.
As shown in fig. 2, in the embodiment of the present invention, the pixel 2 may include at least three sub-pixels 3 with different colors, for example, the three sub-pixels 3 with different colors may include a green sub-pixel G, a red sub-pixel R, and a blue sub-pixel B. In practical applications, the sub-pixels 3 may also be sub-pixels of other colors, and the arrangement order and the arrangement manner of the sub-pixels 3 of different colors are not limited to the order and the manner shown in fig. 2, and are not listed here. As shown in fig. 2, the sub-pixels 3 are arranged in a matrix form, and the number of sub-pixels 3 per row and the number of sub-pixels 3 per column are merely an example.
In the embodiment of the present invention, for the sub-pixels 3 of the same color, the slope angle of the pixel defining structure 6 corresponding to the sub-pixel 3 gradually decreases along the first direction. For example: for the red sub-pixel R, along the first direction, the slope angle of the pixel defining structure 6 corresponding to the red sub-pixel R gradually decreases; for the green sub-pixel G, along the first direction, the slope angle of the pixel defining structure 6 corresponding to the green sub-pixel G gradually decreases; for the blue sub-pixel B, the slope angle of the pixel defining structure 6 corresponding to the blue sub-pixel B gradually decreases along the first direction. As shown in fig. 2 and 3, for example, the slope angles of the pixel defining structures 6 corresponding to the three blue sub-pixels B are δ 1, δ 2 and δ 3 along the first direction, respectively, where δ 1 > δ 2 > δ 3. Therefore, for the sub-pixels 3 with the same color, the slope angle of the pixel definition structure 6 close to the display area boundary b is smaller, so that the light-emitting efficiency of the organic light-emitting material 8 of the opening region 7 close to the display area boundary b is larger, the problem of more brightness attenuation under a large viewing angle of the display area boundary is solved to a certain extent, and the brightness attenuation under the large viewing angle is reduced.
As shown in fig. 2 and 4, for one pixel 2, the slope angle of the pixel definition structure 6 corresponding to the red sub-pixel R is α, the slope angle of the pixel definition structure 6 corresponding to the green sub-pixel G is β, and the slope angle of the pixel definition structure 6 corresponding to the blue sub-pixel B is γ.
In the embodiment of the present invention, the sub-pixels 3 with different colors have different light emitting efficiencies. Among the red, green and blue sub-pixels R, G and B, the green sub-pixel G has the highest luminous efficiency, and the luminous efficiency of the green sub-pixel G is much greater than that of the red sub-pixel R and that of the blue sub-pixel B. The higher the light emission efficiency is, the larger the inclination angle of the pixel defining structure 6 corresponding to the sub-pixel 3 is with respect to the same pixel 2. In the embodiment of the present invention, β > α, and β > γ are set for the same pixel 2 in at least some of the pixels 2. In the same pixel 2, the slope angle β of the pixel definition structure 6 corresponding to the green sub-pixel G with the largest light-emitting efficiency is the largest, so that the light-emitting angle of the organic light-emitting material 8 in the opening region 7 corresponding to the green sub-pixel G is the smallest, and the light-emitting efficiency of the organic light-emitting material 8 in the opening region 7 corresponding to the green sub-pixel G is the smallest, thereby reducing the brightness difference of the sub-pixels 3 with different colors of the same pixel 2, further reducing the color cast phenomenon, and further improving the display quality of the display panel.
In the embodiment of the present invention, the light emitting efficiency of the green sub-pixel G is greater than that of the red sub-pixel R, and the light emitting efficiency of the red sub-pixel R is greater than that of the blue sub-pixel B, then in the same pixel 2, β > α > γ, so that the light emitting angle of the organic light emitting material 8 in the opening region 7 corresponding to the green sub-pixel G in the same pixel 2 is smaller than that of the organic light emitting material 8 in the opening region 7 of the red sub-pixel R, and the light emitting angle of the organic light emitting material 8 in the opening region 7 of the red sub-pixel R is smaller than that of the organic light emitting material 8 in the opening region 7 corresponding to the blue sub-pixel B, so that the light emitting efficiency of the organic light emitting material 8 in the opening region 7 corresponding to the green sub-pixel G is the smallest and the light emitting efficiency of the organic light emitting material 8 in the opening region 7 corresponding to the blue sub-pixel B is the largest, thereby further reducing the luminance difference of the sub-pixels 3 of different colors of the same pixel 2, the color cast phenomenon is further weakened, and the display quality of the display panel is further improved.
In the embodiment of the present invention, the slope angle of the pixel defining structure 6 is less than 30 °, and at this time, the slope angle of the pixel defining structure 6 is smaller, so that the light emitting angle of the organic light emitting material 8 in the opening region 7 corresponding to the sub-pixel 3 is larger, thereby improving the light emitting efficiency of the organic light emitting material 8 in the opening region 7 corresponding to the sub-pixel 3, and further improving the light utilization rate. In addition, in the embodiment of the present invention, when the slope angle of the pixel defining structure 6 is less than 30 °, the slope of the pixel defining structure 6 is a more gradual slope, and the surface of the slope is increased, so that the adhesion of the thinner cathode 11 on the slope is more facilitated, the film forming quality of the cathode 11 is improved, and the performance of the organic light emitting device is further improved.
Fig. 6 is a schematic diagram illustrating a slope angle change of a display panel according to an embodiment of the present invention, as shown in fig. 6, in the embodiment of the present invention, along a first direction, a slope angle of a side of at least a portion of the corresponding pixel defining structures 6, which is away from a central position a of the display area, is gradually decreased. As shown in fig. 6, the pixel defining structure 6 corresponding to the sub-pixel 3 of each color may have two slope angles along the first direction, where the two slope angles are respectively a slope angle at a side close to the central position a of the display area and a slope angle at a side far from the central position a of the display area. As shown in fig. 6, for example, the slope angle of the pixel defining structure 6 on the side close to the central position a of the display area is the slope angle on the left side of the pixel defining structure 6, and the slope angle of the pixel defining structure 6 on the side far from the central position a of the display area is the slope angle on the right side of the pixel defining structure 6. As shown in fig. 6, for example, the angles of the slope angles of the pixel defining structures 6 corresponding to the three blue sub-pixels B on the side close to the display central position a are the same, the slope angles on the side far from the display central position a are the slope angles δ 1, δ 2, δ 3 and δ 4, respectively, and the slope angles δ 1, δ 2, δ 3 and δ 4 are gradually reduced. Because the slope angle of the side, far away from the central position a, of the pixel definition structure 6 is closer to the boundary b of the display area, for a sub-pixel of one color, only the slope angle of the side, far away from the central position a, of the display area of the pixel definition structure 6 is gradually reduced, and the light-emitting angle of the organic light-emitting material 8 in the opening area 7 corresponding to the sub-pixel 3 can be larger to a certain extent, so that the light-emitting efficiency of the organic light-emitting material 8 in the opening area 7 corresponding to the sub-pixel 3 is increased, the brightness attenuation under a large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved.
In the embodiment of the present invention, as shown in fig. 3 and 4, the slope angles of the pixel defining structures 6 on two sides of the same opening region 7 are the same, so that the gentle degrees of the slopes on two sides of the opening region 7 are the same, and thus the opening region 7 can uniformly emit light; the slopes on the two sides of the opening region 7 are favorable for the thin cathode 11 to be attached to the slopes, so that the film forming quality of the cathode 11 is further improved, and the performance of the organic light-emitting device is further improved. Then, as shown in fig. 3, the slope angles of the two sides of the sub-pixel 3 of at least one color, corresponding to at least a part of the pixel defining structure 6, are gradually decreased along the first direction. The slope angles of the two sides of the pixel definition structure 6 are gradually reduced, and the light-emitting angle of the organic light-emitting material 8 in the opening region 7 corresponding to the sub-pixel 3 is further increased, so that the light-emitting efficiency of the organic light-emitting material 8 in the opening region 7 corresponding to the sub-pixel 3 is further increased, the brightness attenuation under a large viewing angle is further reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved.
Fig. 7 is a schematic diagram of a preset position of a display panel according to an embodiment of the present invention, as shown in fig. 7, in an embodiment of the present invention, in a region from a preset position c to a display area boundary b on a display panel 200 along a first direction, a slope angle of a pixel definition structure 6 corresponding to a sub-pixel 3 of at least one color is gradually decreased; wherein, the distance from the preset position c to the display area boundary b is more than or equal to 6 mm. In the embodiment of the invention, because the brightness attenuation of the position close to the boundary b of the display area under the large viewing angle is larger, the slope angle can be gradually smaller from the preset position c to the area of the boundary b of the display area, the preset position c can be the position between the central position a of the display area and the boundary b of the display area, and the slope angle can be reduced only in the area close to the boundary b of the display area, so that the problem of more brightness attenuation of the boundary of the display area under the large viewing angle can be solved to a certain extent only by reducing the slope angle in the area close to the boundary b of the display area, and the brightness attenuation under the large viewing angle is reduced.
Of course, in practical applications, as shown in fig. 3 and 4, the preset position may also be the display area center position a. At this time, the slope angle of the pixel defining structure 6 in the region from the central position a of the display region to the boundary b of the display region can be gradually reduced, so that the brightness attenuation under a large viewing angle is further reduced, the color cast phenomenon is weakened, and the display quality of the display panel is further improved.
As shown in fig. 7, in the embodiment of the present invention, a region from the center position a of the display area to the preset position c is a first region S1, and a region from the preset position c to the boundary b of the display area is a second region S2, wherein the slope angle of the pixel definition structure 6 corresponding to the sub-pixel 3 located in the first region S1 is greater than or equal to the slope angle of the pixel definition structure 6 corresponding to the sub-pixel 3 located in the second region S2.
In the embodiment of the present invention, the display panel has four first directions, each of the first directions has a preset position c, the four preset positions c are sequentially connected to form a rectangular region centered on the central position a of the display area, the rectangular region is a first region S1, and the region outside the first region S1 in the display area 1 is a second region S2.
In the embodiment of the present invention, the slope angle of the pixel definition structure 6 corresponding to the sub-pixel 3 located in the first region S1 may be greater than or equal to the slope angle of the pixel definition structure 6 corresponding to the sub-pixel 3 located in the second region S2, so that the problem of more luminance attenuation at a large viewing angle of the display region boundary can be solved to a certain extent by reducing the slope angle in the second region, and thus the luminance attenuation at the large viewing angle is reduced. Fig. 8 is a schematic diagram of color coordinates of a display panel under different slope angles in an embodiment of the present invention, and fig. 9 is a schematic diagram of color shift of the display panel under different slope angles in an embodiment of the present invention. The experimental results of the display panel are further described below with reference to fig. 8 and 9.
As shown in fig. 8, fig. 8 shows a UV color coordinate system. All image files are two-dimensional, a plane, the horizontal direction is U, the vertical direction is V, and any pixel on the image can be located through the plane and the two-dimensional UV coordinate system. In fig. 8, the abscissa is U and the ordinate is V. In fig. 8, the front view character coordinates of the sub-pixels of different colors at different slope angles are shown, and specifically, the front view character coordinates of the red sub-pixel R at different slope angles, the front view character coordinates of the green sub-pixel G at different slope angles, and the front view character coordinates of the blue sub-pixel B at different slope angles are shown. Compared with the color coordinate under the original slope angle, the color coordinate of the front view angle is closer to the specification value after the slope angle corresponding to the red sub-pixel R is reduced; compared with the color coordinate under the original slope angle, the color coordinate of the front viewing angle is closer to the specification value after the slope angle corresponding to the blue sub-pixel B is reduced; compared with the color coordinate under the original slope angle, the color coordinate of the front view angle is far away from the specification value after the slope angle corresponding to the green sub-pixel G is reduced. Therefore, in addition to the front-view character coordinates of the green sub-pixel G, after the slope angle corresponding to the red sub-pixel R and the slope angle corresponding to the green sub-pixel G are decreased, the color coordinates are closer to the specification value. It can be seen from the above that, reducing the slope angle can reduce the brightness attenuation under a large viewing angle, so that the color coordinates of part of the colors are closer to the specification value, thereby achieving the purpose of reducing the color cast phenomenon. Wherein the original slope angle is greater than the reduced slope angle.
As shown in fig. 9, the abscissa in fig. 9 is a gradient angle in degrees (°), and the ordinate is a color shift value. Color shift of different color sub-pixels at different slope angles is shown in fig. 9, where the abscissa is the viewing angle value and the ordinate is the color shift value. Compared with the color cast value under the original slope angle, the color cast value has no great change after the slope angle corresponding to the red sub-pixel R is reduced; compared with the color cast value under the original slope angle, the color cast value corresponding to the visual angle below 50 degrees is obviously reduced after the slope angle corresponding to the blue sub-pixel B is reduced; compared with the color deviation value under the original slope angle, the color deviation value corresponding to the visual angle below 50 degrees is reduced after the slope angle corresponding to the green sub-pixel G is reduced. Therefore, in addition to the color shift value of the red sub-pixel R, after the slope angle corresponding to the green sub-pixel G and the slope angle corresponding to the blue sub-pixel B are decreased, the color shift value is decreased, thereby reducing the color shift phenomenon.
In the technical scheme of the display panel provided by the embodiment of the invention, because the gradient angle of the pixel definition structure is gradually reduced from the central position of the display area to the boundary of the display area, the light-emitting efficiency of the organic light-emitting material in the opening area close to the boundary of the display area is higher, the problem of more brightness attenuation under a large viewing angle of the boundary of the display area is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved.
As shown in fig. 10, fig. 10 is a schematic structural diagram of a display device according to embodiment 7 of the present invention, and the display device includes the display panel 200. The specific structure of the display panel 200 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 10 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The display device provided by the embodiment of the invention comprises the display panel, the display panel comprises a display area, the display area comprises a plurality of sub-pixels defined by the pixel definition structures, and the slope angle of the pixel definition structures in the sub-pixels of at least one color is gradually reduced from the center position of the display area to the boundary of the display area, so that the light extraction efficiency of the organic light-emitting material in the opening area close to the boundary of the display area is higher, the problem of more brightness attenuation under the large viewing angle of the boundary of the display area is solved, the brightness attenuation under the large viewing angle is reduced, the color cast phenomenon is weakened, and the display quality of the display panel is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A display panel, comprising:
a display area including a plurality of pixels; the pixel comprises a plurality of sub-pixels of different colors;
the pixel structure comprises a substrate base plate and a pixel defining layer positioned on the substrate base plate;
the pixel definition layer comprises a plurality of pixel definition structures, wherein opening regions are arranged among the pixel definition structures, the opening regions define the sub-pixels, and organic light-emitting materials are arranged in the opening regions;
along a first direction, the gradient angle of the sub-pixel of at least one color corresponding to at least part of the pixel defining structure is gradually reduced;
the first direction is a direction from the center position of the display area to the boundary of the display area;
the pixel at least comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel;
for one pixel, the slope angle of the pixel defining structure corresponding to the red sub-pixel is α, the slope angle of the pixel defining structure corresponding to the green sub-pixel is β, and the slope angle of the pixel defining structure corresponding to the blue sub-pixel is γ, wherein,
in at least some of the pixels, β > α, and β > γ for the same pixel.
2. The display panel according to claim 1, wherein for the sub-pixels of the same color, the slope angle of the pixel defining structure corresponding to the sub-pixel gradually decreases along the first direction.
3. The display panel according to claim 1, wherein β > α > γ in the same pixel.
4. The display panel according to claim 1, wherein along the first direction, the slope angle of at least one color of the sub-pixels corresponding to at least a portion of the pixel defining structures on a side away from the center of the display area gradually decreases.
5. The display panel of claim 1 wherein the pixel defining structure has a slope angle of less than 30 °.
6. The display panel according to claim 1, wherein in the first direction, the slope angle of the pixel definition structure corresponding to the sub-pixel of at least one color gradually decreases in a region from a preset position on the display panel to the display region boundary; wherein the content of the first and second substances,
the distance from the preset position to the boundary of the display area is greater than or equal to 6 mm.
7. The display panel according to claim 6, wherein the predetermined position is a display area center position.
8. The display panel according to claim 6, wherein a region from the center position of the display region to the predetermined position is a first region, and a region from the predetermined position to the boundary of the display region is a second region, and wherein a slope angle of the pixel defining structure corresponding to the sub-pixel located in the first region is greater than or equal to a slope angle of the pixel defining structure corresponding to the sub-pixel located in the second region.
9. A display device comprising the display panel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465216.8A CN110164938B (en) | 2019-05-30 | 2019-05-30 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465216.8A CN110164938B (en) | 2019-05-30 | 2019-05-30 | Display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110164938A CN110164938A (en) | 2019-08-23 |
| CN110164938B true CN110164938B (en) | 2021-07-30 |
Family
ID=67630636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910465216.8A Active CN110164938B (en) | 2019-05-30 | 2019-05-30 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110164938B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063831B (en) * | 2019-12-04 | 2021-04-02 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel, manufacturing method thereof and OLED display |
| CN110828535B (en) * | 2019-12-20 | 2022-09-27 | 武汉天马微电子有限公司 | Array substrate, display panel and display device |
| CN111293157B (en) * | 2020-02-25 | 2023-01-20 | 昆山国显光电有限公司 | Display panel and display device |
| CN111627959B (en) * | 2020-03-24 | 2022-08-02 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN111446276A (en) * | 2020-03-31 | 2020-07-24 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111490080B (en) * | 2020-04-16 | 2022-08-16 | 云谷（固安）科技有限公司 | Display panel and display device thereof |
| CN111416052A (en) * | 2020-05-09 | 2020-07-14 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN111799393B (en) * | 2020-07-20 | 2023-08-25 | 京东方科技集团股份有限公司 | Flexible display panel, manufacturing method thereof and flexible display device |
| CN111862877B (en) | 2020-07-28 | 2021-06-04 | 惠科股份有限公司 | Wide-viewing-angle adjustment method, display panel and computer-readable storage medium |
| CN112259580B (en) * | 2020-10-15 | 2022-08-02 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112420783B (en) * | 2020-11-04 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic device |
| CN112415754B (en) * | 2020-12-14 | 2022-11-11 | Oppo广东移动通信有限公司 | Display panel, display device of display panel, head-mounted display equipment and display uniformity calibration method |
| CN112786669A (en) * | 2021-01-08 | 2021-05-11 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel |
| CN113745298B (en) * | 2021-08-31 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN114597324B (en) * | 2022-03-01 | 2023-05-12 | 武汉华星光电半导体显示技术有限公司 | Display device |
| WO2024020942A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Display panel and near-eye display apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008016205A (en) * | 2006-07-03 | 2008-01-24 | Seiko Epson Corp | Optical device and electronic apparatus |
| WO2011001614A1 (en) * | 2009-06-29 | 2011-01-06 | パナソニック株式会社 | Organic el display panel |
| US9142598B2 (en) * | 2011-06-24 | 2015-09-22 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting panel, light-emitting device using the light-emitting panel, and method for manufacturing the light-emitting panel |
-
2019
- 2019-05-30 CN CN201910465216.8A patent/CN110164938B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110164938A (en) | 2019-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110164938B (en) | Display panel and display device | |
| US11716876B2 (en) | Display panel, manufacture method thereof and display apparatus | |
| CN107731870B (en) | Organic light emitting diode pixel structure, display panel comprising same and display device | |
| US11380236B2 (en) | Sub-pixel arrangement structure, mask device, and display device | |
| US11730036B2 (en) | Pixel arrangement structure, organic light emitting diode display panel, display device and mask plate assembly | |
| CN110289298B (en) | Display device, display panel thereof and transparent display panel | |
| US11004907B2 (en) | Organic light-emitting display panel and pixel arrangement thereof | |
| CN108321183B (en) | Organic light-emitting display panel and display device | |
| US10700137B2 (en) | Display panel and display device | |
| US20220005881A1 (en) | Pixel arrangement structure and display panel | |
| US10706769B2 (en) | Display panel and display device | |
| CN108321178B (en) | Pixel structure, mask plate and display device | |
| CN107887424B (en) | Display panel and display device | |
| CN110364557B (en) | Pixel arrangement structure and display panel | |
| CN110707141B (en) | Organic light emitting display substrate and display device | |
| CN108538900B (en) | Display screen and display device | |
| WO2020143213A1 (en) | Pixel structure, display substrate and display device | |
| US11957019B2 (en) | Pixel arrangement structure, display method and preparing method of pixel arrangement structure, and display substrate | |
| CN111293162A (en) | Display panel and display device | |
| CN111029379A (en) | Display panel, preparation method thereof and display device | |
| CN113097277A (en) | Display panel and display device | |
| CN110098232A (en) | OLED display panel | |
| CN109841747B (en) | Organic light-emitting display panel and display device | |
| WO2021031318A1 (en) | Transparent display panel | |
| US11195882B2 (en) | Pixel arrangement structure, display substrate and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |