CN109801559B - Display panel and display device - Google Patents
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Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to solve the problem of optical crosstalk among different color sub-pixels in a quantum dot display panel. The display panel comprises a backlight source, a quantum dot color film layer and a retaining wall structure. The retaining wall structure only comprises a first retaining wall, and the projection of the first retaining wall on the plane where the display panel is located is only located between a first color sub-pixel area of the display panel and a sub-pixel area which is adjacent to the first color sub-pixel area and has different colors; or the retaining wall structure comprises a first retaining wall and a second retaining wall, the projection of the first retaining wall on the plane where the display panel is located between the first color sub-pixel region of the display panel and the sub-pixel region which is adjacent to the first color sub-pixel region and has different colors, the projection of the second retaining wall on the plane where the display panel is located is only located between the second color sub-pixel region and the third color sub-pixel region of the display panel, and the height of the first retaining wall is greater than that of the second retaining wall.
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 ]
The Quantum dot material has the advantages of concentrated light emission spectrum, high color purity, continuously adjustable light emission spectrum and the like, and the color gamut and the color reduction capability of the display device can be effectively improved by applying the Quantum dot material to the display device by utilizing the advantages.
However, the conventional quantum dot display panel has a problem of optical crosstalk between sub-pixels of different colors, and thus the display effect is affected.
[ summary of the invention ]
Embodiments of the present invention provide a display panel and a display device to improve the problem of crosstalk between different color sub-pixels in a quantum dot display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
the pixel unit areas are arranged in an array mode and comprise a first color sub-pixel area, a second color sub-pixel area and a third color sub-pixel area;
the display panel further comprises a backlight source and a quantum dot color film layer positioned on the light emitting side of the backlight source, wherein the backlight source is overlapped with the first color sub-pixel area, the second color sub-pixel area and the third color sub-pixel area; the quantum dot color film layer comprises a first color film, a second color quantum dot color film and a third color quantum dot color film; the first color film covers the first color sub-pixel region, the second color quantum dot color film covers the second color sub-pixel region, and the third color quantum dot color film covers the third color sub-pixel region;
the retaining wall structure is positioned between the backlight source and the quantum dot color film layer;
the retaining wall structure comprises a first retaining wall, and the projection of the first retaining wall on the plane where the display panel is located is only located between the first color sub-pixel area and the projection of the sub-pixel area which is adjacent to the first color sub-pixel area and has different colors on the plane where the display panel is located; or, retaining wall structure includes first barricade and second barricade, first barricade is in display panel place planar projection is located first colour sub pixel region and with first colour sub pixel region is adjacent and between the sub pixel region of different colours, the second barricade is in display panel place planar projection only is located second colour sub pixel region with third colour sub pixel region is in between the planar projection of display panel place, the height of first barricade is greater than the height of second barricade.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
According to the display panel and the display device provided by the embodiment of the invention, the first retaining wall is arranged between the first color sub-pixel region and the sub-pixel region which is adjacent to the first color sub-pixel region and has different colors, such as the second color sub-pixel region and/or the third color sub-pixel region, so that the problem of crosstalk between lights of different colors emitted from the first color sub-pixel region and the sub-pixel region which is adjacent to the first color sub-pixel region and has different colors is solved. Moreover, when the display device is pressed, the first retaining wall can also play a role in supporting the display panel, so that devices including a backlight source in the display panel are prevented from being crushed, and the display panel has certain pressure resistance.
Alternatively, in the embodiment of the present invention, the first retaining wall may be disposed between the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region and having different colors, the second retaining wall may be disposed between the second color sub-pixel region and the third color sub-pixel region, and the height of the first retaining wall is greater than the height of the second retaining wall, so as to not only improve the crosstalk between the light of different colors emitted from the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region and having different colors, but also improve the crosstalk between the light of the second color and the light of the third color emitted from the second color sub-pixel region and the third color sub-pixel region. Moreover, when the display panel receives to press, at first by the higher first barricade bearing pressure of height, when pressure reaches the threshold value of the pressure that first barricade can bear, the lower second barricade of height also is as load part bearing pressure, compare with highly setting up first barricade and second barricade to the same scheme, this scheme of adoption, through the cooperation of the first barricade of high difference and second barricade, can make display panel's compressive capacity obtain improving, improve this display device's mechanical strength.
Moreover, on the basis of ensuring the mechanical strength of the display device, the scheme of the embodiment of the invention does not need to set the heights of the first retaining wall and the second retaining wall to be too large, so that the thickness of the display device can be prevented from being too thick, and the thinning design of the display device is facilitated.
[ 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 an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1;
FIG. 3 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view along BB' of FIG. 5;
FIG. 7 is a diagram of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view taken along line CC' of FIG. 7;
FIG. 9 is another schematic cross-sectional view along AA' of FIG. 1;
FIG. 10 is a schematic diagram illustrating an arrangement of sub-pixel regions of different colors in a display panel according to an embodiment of the invention;
fig. 11 is an enlarged schematic view of the pixel cell area 1 in fig. 10;
fig. 12 is a schematic diagram of a display device according to an embodiment of the 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, etc. may be used to describe retaining walls in embodiments of the present invention, these retaining walls should not be limited to these terms. These terms are only used to distinguish the individual retaining walls from one another. For example, the first retaining wall may also be referred to as the second retaining wall, and similarly, the second retaining wall may also be referred to as the first retaining wall without departing from the scope of the embodiments of the present invention.
An embodiment of the present invention provides a display panel, as shown in fig. 1, fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention, where the display panel includes a plurality of pixel unit regions 1 arranged in an array, and each pixel unit region 1 includes a first color sub-pixel region 11, a second color sub-pixel region 12, and a third color sub-pixel region 13 (in fig. 1, sub-pixel regions with different colors are represented by different filling patterns). Specifically, when the display panel performs display, light of a first color is emitted from the first color sub-pixel region 11, light of a second color is emitted from the second color sub-pixel region 12, and light of a third color is emitted from the third color sub-pixel region 13.
Exemplarily, as shown in fig. 2, fig. 2 is a schematic cross-sectional view along AA' of fig. 1, wherein the display panel further includes a backlight 2, and a quantum dot color film layer 3 located on a light-emitting side of the backlight 2 (an arrow in the figure indicates a light-emitting direction of the backlight). Wherein, the backlight 2 overlaps with the first color sub-pixel region 11, the second color sub-pixel region 12 and the third color sub-pixel region 13. The quantum dot color film layer 3 includes a first color film 31, a second color quantum dot color film 32, and a third color quantum dot color film 33. The first color film 31 covers the first color sub-pixel region 11, the second color quantum dot color film 32 covers the second color sub-pixel region 12, and the third color quantum dot color film 33 covers the third color sub-pixel region 13.
For example, the light emitting color of the backlight 2 may be a first color, and correspondingly, the first color film 31 may be a color film that does not change the light emitting color of the backlight 2, for example, the first color film 31 may be a transparent color film, or the first color film 31 may be a first color film, or no color film may be disposed at the first color film 31, and the color of the emergent light of the backlight 2 after passing through the position corresponding to the first color film 31 may still be the first color. The second color quantum dot color film 32 is a quantum dot material capable of emitting light of a second color under excitation of the backlight 2. The third color quantum dot color film 33 is a quantum dot material capable of emitting light of a third color under excitation of the backlight 2.
Alternatively, the first color may be blue. The second color may be red and the third color may be green; alternatively, the second color may be green, and the third color may be red, which is not limited in this embodiment of the present invention.
When the display panel performs display, light of the first color emitted from the backlight 2 is emitted through the first color film 31, so that the first color sub-pixel region 11 displays the first color. The second color quantum dot color film 32 is excited by the light emitted from the backlight 2 to generate light of a second color, i.e., the second color sub-pixel region 12 displays the second color. The color quantum dot film 33 of the third color is excited by the light emitted from the backlight 2 to generate light of the third color, that is, the third color sub-pixel region 13 displays the third color.
With continued reference to fig. 1 and 2, the display panel further includes a retaining wall structure 4. Wherein, the retaining wall structure 4 is located between the backlight source 2 and the quantum dot color film layer 3. Alternatively, as shown in fig. 2, the retaining wall structure 4 includes a first retaining wall 41, and a projection of the first retaining wall 41 on the plane of the display panel is only located between the first color sub-pixel region 11 and a projection of a sub-pixel region adjacent to and different from the first color sub-pixel region 11 on the plane of the display panel, it can be understood that a sub-pixel region adjacent to and different from the first color sub-pixel region 11 may be adjacent to and different from the first color sub-pixel region 11. Specifically, when the first retaining wall 41 is disposed, as shown in fig. 1 and fig. 2, the first retaining wall 41 may be disposed such that the projection of the first retaining wall 41 on the plane of the display panel is only located between the projections of the first color sub-pixel region 11 and the second color sub-pixel region 12 on the plane of the display panel. Alternatively, as shown in fig. 3, fig. 3 is a schematic view of another display panel according to an embodiment of the present invention, wherein the first retaining wall 41 may also be arranged such that the projection of the first retaining wall 41 on the plane of the display panel is only located between the projections of the first color sub-pixel region 11 and the third color sub-pixel region 13 on the plane of the display panel. Alternatively, as shown in fig. 4, fig. 4 is a schematic diagram of another display panel according to an embodiment of the present invention, wherein the first retaining wall 41 may be further configured such that a projection of the first retaining wall 41 on a plane where the display panel is located is not only located between the first color sub-pixel region 11 and the second color sub-pixel region 12, but also located between the first color sub-pixel region 11 and the third color sub-pixel region 13.
As described above, since the second color quantum dot color film 32 and the third color quantum dot color film 33 are respectively disposed in the second color sub-pixel region 12 and the third color sub-pixel region 13, and the first color sub-pixel region 11 is disposed with or without a transparent color film, the light originally directed to the second color quantum dot color film 32 and the third color quantum dot color film 33 is easily directed to the quantum dot color film layer 3 at the position corresponding to the first color sub-pixel region 11; and, light originally emitted to the first color film position is also easily emitted to the positions of the quantum dot color film layer 3 corresponding to the second color sub-pixel region 12 and the third color sub-pixel region 13, that is, light at the first color sub-pixel region 11 is easily interfered by light from the second color sub-pixel region 12 and the third color sub-pixel region 13, and the first color sub-pixel region 11 is also easily interfered to light emission of the second color sub-pixel region 12 and the third color sub-pixel region 13. Especially, when no color film is disposed at a position corresponding to the first color sub-pixel region 11 in the quantum dot color film layer 3, the interference phenomenon is particularly serious. Based on this, the embodiment of the present invention improves the crosstalk problem between the lights of different colors emitted from the first color sub-pixel region 11 and the sub-pixel regions adjacent to and different from the first color sub-pixel region 11, for example, the second color sub-pixel region 12 and/or the third color sub-pixel region 13, by disposing the first retaining wall 41 between the first color sub-pixel region 11 and the sub-pixel regions adjacent to and different from the first color sub-pixel region 11, for example, the second color sub-pixel region 12 and/or the third color sub-pixel region 13. Moreover, when the display panel is pressed, the first retaining wall 41 can also support the display panel, so as to prevent the devices inside the display panel, including the backlight 2, from being crushed, and make the display panel have certain pressure resistance.
Or, as shown in fig. 5, fig. 5 is a schematic view of another display panel according to an embodiment of the present invention, different from the display panel shown in fig. 1, fig. 3 and fig. 4, in fig. 5, the retaining wall structure 4 includes a first retaining wall 41 and a second retaining wall 42, wherein a projection of the first retaining wall 41 on a plane where the display panel is located between the first color sub-pixel region 11 and a sub-pixel region adjacent to the first color sub-pixel region 11 and having a different color, and a projection of the second retaining wall 42 on the plane where the display panel is located is only located between the second color sub-pixel region 12 and a projection of the third color sub-pixel region 13 on the plane where the display panel is located, so that not only can a crosstalk problem between lights of different colors emitted from the first color sub-pixel region 11 and a sub-pixel region adjacent to the first color and having a different color be improved, but also a cross talk between lights of the second color and a light of the third color emitted from the second color sub-pixel region 12 and the third color sub-pixel region 13 can be improved The cross talk problem between cells is improved. On this basis, as shown in fig. 6, fig. 6 is a schematic cross-sectional view along BB' of fig. 5, wherein a color film is not disposed at a position corresponding to the first color film 31, in the embodiment of the present invention, the height H41 of the first retaining wall 41 is greater than the height H42 of the second retaining wall 42, so that when the display panel is pressed, the first retaining wall 41 with a higher height first bears the pressure, and when the pressure reaches a threshold of the pressure that the first retaining wall 41 can bear, the second retaining wall 42 with a lower height also acts as a bearing component to bear the pressure.
Moreover, on the basis of ensuring the mechanical strength of the display panel, the scheme of the embodiment of the invention does not need to set the heights of the first retaining wall 41 and the second retaining wall 42 too large, so that the thickness of the display panel is not too thick, and the thinning design of the display panel is facilitated.
For example, the retaining wall structures 4 including the first retaining wall 41 and the second retaining wall 42 may be made of an opaque material including a light absorbing material, so as to absorb light emitted from the first color sub-pixel region 11 to the second color sub-pixel region 12 and light emitted from the first color sub-pixel region 11 to the third color sub-pixel region 13, thereby preventing light interference between sub-pixel regions of different colors and ensuring display effect. Alternatively, the light absorbing material may be selected from opaque metal oxide materials, such as molybdenum oxide, and the like. Alternatively, the retaining wall structure 4 may be provided to include two parts, namely, a column and a surface film layer covering the column, wherein the material of the column may be a transparent resin material such as polyimide, and the surface film layer covering the column may be the light absorbing material.
Alternatively, the shape of the retaining wall structure 4 including the first retaining wall 41 and the second retaining wall 42 is not limited in the embodiment of the present invention, and for example, as shown in fig. 2 and 6, the cross-sectional shapes of the first retaining wall 41 and the second retaining wall 42 may be set to be trapezoidal.
Illustratively, on the basis of the first retaining wall 41 disposed between the first color sub-pixel region 11 and the second color sub-pixel region 12, the embodiment of the present invention further sets the distance between the first color sub-pixel region 11 and the sub-pixel region adjacent to the first color sub-pixel region 11 and having different colors to be greater than the distance between the second color sub-pixel region 12 and the third color sub-pixel region 13, so that the propagation distance of the light between the first color sub-pixel region 11 and the sub-pixel region adjacent to the first color sub-pixel region 11 and having different colors is increased, thereby improving the crosstalk problem between the light of different colors respectively emitted from the first color sub-pixel region 11 and the sub-pixel region adjacent to the first color sub-pixel region and having different colors. As mentioned above, the sub-pixel region of the first color adjacent to the sub-pixel region 11 of the first color and different in color can be understood as being adjacent to the sub-pixel region 11 of the first color and different in color from the sub-pixel region 11 of the first color, and here, the sub-pixel region of the first color adjacent to the sub-pixel region 11 of the first color and different in color can be only the sub-pixel region 12 of the second color, only the sub-pixel region 13 of the third color, and can include both the sub-pixel region 12 of the second color and the sub-pixel region 13 of the third color. Taking as an example that only the pitch between the first-color sub-pixel region 11 and the third-color sub-pixel region 13 is set to be larger than the pitch between the second-color sub-pixel region 12 and the third-color sub-pixel region 13, as shown in fig. 7 and 8, fig. 7 is a schematic view of another display panel according to an embodiment of the invention, fig. 8 is a schematic cross-sectional view taken along line CC' of fig. 7, wherein a spacing d13 between the first color sub-pixel region 11 and the third color sub-pixel region 13 is greater than a spacing d23 between the second color sub-pixel region 12 and the third color sub-pixel region 13, so that the propagation distance of light between the first color sub-pixel region 11 and the third color sub-pixel region 13 is increased, thereby improving the crosstalk problem between the light of the first color and the light of the third color respectively emitted from the first color sub-pixel region 11 and the third color sub-pixel region 13. When the distance between the first color sub-pixel region 11 and the second color sub-pixel region 12 is set to be greater than the distance between the second color sub-pixel region 12 and the third color sub-pixel region 13, or the distance between the first color sub-pixel region 11 and the second color sub-pixel region 12 and the distance between the first color sub-pixel region 11 and the third color sub-pixel region 13 are both set to be greater than the distance between the second color sub-pixel region 12 and the third color sub-pixel region 13, the same is true, and details are not repeated here.
For example, the backlight 2 may be provided in various forms, for example, a plurality of light emitting diodes LEDs emitting light of the first color may be used as the backlight 2. Alternatively, an organic light-emitting layer that emits light of the first color may be selected as the backlight.
Specifically, when light emitted by the organic light emitting layer is used as a backlight, as shown in fig. 9, fig. 9 is another schematic cross-sectional view along AA' of fig. 1, where the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 each include a first electrode 91 and a second electrode 92, which are stacked, the first electrodes 91 located in the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 are independent of each other, and the second electrodes 92 located in the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 are connected to each other; the organic light emitting layer 40 is positioned between the first electrode 91 and the second electrode 92.
For example, the first electrode 91 may be an anode, and the second electrode 92 may be a cathode. When a sub-pixel of a certain color region needs to emit light, the organic light emitting layer 40 of the corresponding region needs to emit light to provide a backlight source, so that an electrical signal is provided to the first electrode 91 and the second electrode 92 on both sides of the organic light emitting layer 40, holes generated by the first electrode 91 are injected into the organic light emitting layer 40 under the action of the voltage difference between the first electrode 91 and the second electrode 92, electrons generated by the second electrode 92 are also injected into the organic light emitting layer 40, the electrons and the holes are recombined in the organic light emitting layer 40 to generate excitons, and the exciton radiation is transited from an excited state to a ground state, so that the organic light emitting layer 40 emits light.
Specifically, as shown in fig. 9, in the embodiment of the present invention, projections of the second color quantum dot color film 32 and the first electrode 91 located in the second color sub-pixel region 12 on a plane where the display panel is located are set to be overlapped, so that in the second color sub-pixel region 12, the organic light emitting layer 40 overlapped with the first electrode 91 is overlapped with the second color quantum dot color film 32, so that light emitted by the organic light emitting layer 40 located in the second color sub-pixel region 12 can be more vertically emitted to the second color quantum dot color film 32. Similarly, in the embodiment of the present invention, the projections of the third color quantum dot color film 33 and the first electrode 91 located in the third color sub-pixel region 13 on the plane of the display panel are set to overlap, so that in the third color sub-pixel region 13, the organic light emitting layer 40 overlapping the first electrode 91 overlaps the third color quantum dot color film 33, and thus, more light emitted by the organic light emitting layer 40 located in the third color sub-pixel region 13 can vertically irradiate the third color quantum dot color film 33, so as to improve the crosstalk problem between sub-pixel regions of different colors.
Illustratively, as shown in fig. 9, in order to improve the carrier mobility and recombination efficiency, a common layer 44 is further disposed in the display panel, the common layer 44 is located on a side of the organic light emitting layer 40 facing the first electrode 91 and/or the second electrode 92, and the common layers 44 located in the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 are connected to each other. Alternatively, the common layer 44 positioned at a side of the organic light emitting layer 40 facing the first electrode 91 may include a hole injection layer and a hole transport layer, and the common layer 44 positioned at a side of the organic light emitting layer 40 facing the second electrode 92 may include an electron injection layer and an electron transport layer.
As shown in fig. 9, by setting the distance d411 between the first electrodes 91 of the first color sub-pixel region 11 and the third color sub-pixel region 13 to be greater than the distance d412 between the second color sub-pixel region 12 and the first electrodes 91 of the third color sub-pixel region 13, the embodiment of the invention can not only increase the propagation distance of light between the first color sub-pixel region 11 and the third color sub-pixel region 13, but also improve the crosstalk problem between the light of the first color and the light of the third color emitted from the first color sub-pixel region 11 and the third color sub-pixel region 13. In addition, in the prior art, in the process of emitting light from the corresponding organic light emitting layer 40 in the sub-pixel region of a certain color, some of the carriers that have migrated longitudinally between the first electrode 91 and the second electrode 92 migrate laterally along the common layer 44 toward the sub-pixel regions of other colors, that is, a lateral leakage phenomenon occurs. In the embodiment of the present invention, the distance d411 between the first electrodes 91 of the first color sub-pixel region 11 and the third color sub-pixel region 13 is increased, so that the transmission path of carriers from the first color sub-pixel region 11 to the third color sub-pixel region 13 is increased, that is, the difficulty of carriers moving from the first color sub-pixel region 11 to the third color sub-pixel region 13 is increased, and thus the lateral leakage phenomenon can be improved. It should be noted that, the case where the distance between the first electrodes 91 located in the first color sub-pixel region 11 and the second color sub-pixel region 12 is set to be greater than the distance between the first electrodes 91 located in the second color sub-pixel region 12 and the third color sub-pixel region 13, or the distance between the first electrodes 91 located in the first color sub-pixel region 11 and the second color sub-pixel region 12, and the distance between the first electrodes 91 located in the first color sub-pixel region 11 and the third color sub-pixel region 13 is set to be greater than the distance between the first electrodes 91 located in the second color sub-pixel region 12 and the third color sub-pixel region 13 is the same, and the description is omitted here.
In addition, as shown in fig. 9, in the embodiment of the invention, the common layer 44 is disposed to cover the first retaining wall 41, so that compared with the scheme that the first retaining wall 41 is not disposed between the first color sub-pixel region 11 and the second color sub-pixel region 12, the common layer 44 is changed from a flat structure to include a protrusion corresponding to the first retaining wall 41, and the transmission path through which the carriers are transmitted can be increased, thereby improving the lateral leakage phenomenon of the carriers.
Illustratively, as shown in fig. 9, the display panel further includes a pixel defining layer 5 located between the retaining wall structure 4 and the backlight 2, the pixel defining layer 5 includes a plurality of opening regions 51 and non-opening regions 52 alternately arranged; the organic light emitting layer 40 is at least located in the opening area 51. In the case of providing the organic light emitting layer 40, for example, the organic light emitting layer 40 may be provided in a full-face structure while covering the opening area 51 and the non-opening area 52. Alternatively, as shown in fig. 9, the organic light emitting layer 40 may be only located in the opening region 51 to prevent carriers from laterally moving between the organic light emitting layers located between different sub-pixel regions, thereby further improving the lateral leakage phenomenon.
Alternatively, as shown in fig. 9, the retaining wall structures 4 are located in the non-opening regions 52 to avoid affecting the light emission of the organic light emitting layer 40 located in the opening regions 52.
Exemplarily, as shown in fig. 10, fig. 10 is a schematic layout diagram of sub-pixel regions of different colors in a display panel according to an embodiment of the present invention, wherein an area of the first color sub-pixel region 11 is smaller than areas of the second color sub-pixel region 12 and the third color sub-pixel region 13. Because the conversion efficiency of the second color quantum dot color film and the third color quantum dot color film to the light emitted by the backlight source is low, in the embodiment of the invention, the area of the first color sub-pixel 11 is set to be smaller than the areas of the second color sub-pixel region 12 and the third color sub-pixel region 13, and accordingly, the area of the first color film in the quantum dot color film layer can be set to be smaller than the areas of the second color quantum dot color film 32 and the third color quantum dot color film 33, so that the light emitting effect of three colors emitted from the quantum dot color film layer is balanced, and the color cast phenomenon caused by the strong light of the emitted first color and the weak light of the other two colors is avoided.
As shown in fig. 10, a distance d13 between the first color sub-pixel region 11 and the third color sub-pixel region 13 is greater than a distance d23 between the second color sub-pixel region 12 and the third color sub-pixel region 13.
Illustratively, as shown in fig. 10, the centers of the first color sub-pixel region 11, the second color sub-pixel region 12 and the third color sub-pixel region 13 are not collinear, and this arrangement is adopted to improve the color mixing effect of the light emitted from the first color sub-pixel region 11, the second color sub-pixel region 12 and the third color sub-pixel region 13.
Illustratively, with continued reference to fig. 10, the plurality of pixel unit regions 1 are arrayed in a first direction x and a second direction y, the first direction x and the second direction y intersecting. In one pixel unit region 1, the first color sub-pixel region 11 and the second color sub-pixel region 12 are arranged along the first direction x, and the first color sub-pixel region 11 and the third color sub-pixel region 13 are arranged along the second direction y, so that the centers of the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 are not collinear, and the color mixing effect of light emitted from the first color sub-pixel region 11, the second color sub-pixel region 12, and the third color sub-pixel region 13 is improved.
Alternatively, as shown in fig. 10, the first color sub-pixel region 11 is quadrilateral in shape; the second color sub-pixel region 12 is hexagonal in shape; the third color sub-pixel region 13 is octagonal in shape, and in the case that the areas of the second color sub-pixel region 12 and the third color sub-pixel region 13 are constant, compared with the case that the second color sub-pixel region 12 and the third color sub-pixel region 13 are both set to be quadrilateral in shape, the embodiment of the invention can reduce the perimeter of the outline of the two regions by increasing the number of the side lengths of the shapes of the two regions, so that the length of the black matrix set around the sub-pixel regions of different colors can also be reduced.
As shown in fig. 11, fig. 11 is an enlarged schematic view of the pixel unit area 1 in fig. 10, wherein the first color sub-pixel area 11 includes a first edge 81, the second color sub-pixel area 12 includes a second edge 82 close to the first edge 81, and the second edge 82 is parallel to the first edge 81. The first color sub-pixel region 11 further comprises a third edge 83 adjacent to the first edge 81, the third color sub-pixel region 13 comprises a fourth edge 84 adjacent to the third edge 83, the distance between the first color sub-pixel region 11 and the third color sub-pixel region 13 is the distance d13 between the third edge 83 and the fourth edge 84, and the fourth edge 84 is parallel to the third edge 83. The second color sub-pixel region 12 further comprises a fifth edge 85 adjacent to the second edge 82, the third color sub-pixel region 13 further comprises a sixth edge 86 adjacent to the fourth edge 84, and the distance between the second color sub-pixel region 12 and the third color sub-pixel region 13 is the distance d23 between the fifth edge 85 and the sixth edge 86, and d13> d 23. Wherein the fifth edge 85 is parallel to the sixth edge 86. Compared with the existing pixel unit area, the pixel unit area is arranged in such a way, so that the first color sub-pixel area, the second color sub-pixel area and the third color sub-pixel area can be arranged tightly under the same process condition, and the distance between the adjacent sub-pixel areas is reduced as much as possible, so that the opening area of the sub-pixel is increased under the same resolution condition, the driving current of the display device is reduced, the service life of the display device is prolonged, meanwhile, the adjacent two sub-pixel areas with different colors are arranged at intervals in a staggered way, the pattern visibility is reduced or eliminated, and the display unevenness is improved; furthermore, the arrangement that the partition wall structure and the sub-pixel interval are different in the pixel unit area provided by the embodiment can ensure the advantages of the arrangement of the pixels, reduce the crosstalk between the sub-pixel areas with different colors, improve the display effect, improve the pressure resistance of the display panel, improve the mechanical strength of the display panel, prevent the thickness of the display panel from being too thick, and facilitate the thinning design of the display panel.
Illustratively, as shown in fig. 2, 6, 8 and 9, the display panel further includes a color resist layer 6, and the color resist layer 6 includes a second color resist 62 overlapping with the second quantum dot color film 32 and a third color resist 63 overlapping with the third quantum dot color film 33. When the light of the first color emitted from the backlight 2 is not converted by the second color quantum dot color film 32 and the third color quantum dot color film 33, the second color resist 62 can further filter the light of the first color emitted from the second quantum dot color film 32, so that the light of the second color is emitted from the second color resist 62, and the third color resist 63 can further filter the light of the first color emitted from the third quantum dot color film 33, so that the light of the third color is emitted from the third color resist 63.
Illustratively, as shown in fig. 2, 6, 8 and 9, a black matrix 7 is further included between the first color sub-pixel region 11 and the second color sub-pixel region 12, and between the first color sub-pixel region 11 and the third color sub-pixel region 13, and the black matrix 7 is disposed around each of the sub-pixel regions of different colors to prevent light leakage and color mixing between the sub-pixel regions of different colors. For example, as shown in fig. 2, 6, 8 and 9, the projection of the retaining wall structure 4 on the plane of the display panel overlaps with the projection of the black matrix 7 on the plane of the display panel, so as to reduce the area of the non-light-emitting region as much as possible and improve the aperture ratio of the pixel. Specifically, as shown in fig. 2, the black matrix 7 includes two portions, one of which is located on a side of the quantum dot color film layer 3 close to the backlight 2 and is used for improving crosstalk between light rays emitted from the backlight 2 and directed to quantum dot color films of different colors, and the other of which is located between two adjacent color resistors of different colors and is used for improving crosstalk between light rays emitted from the color resistors of different colors.
Unlike the embodiment shown in fig. 2, in fig. 6, 8 and 9, the embodiment of the present invention can remove the black matrix 7 in fig. 2 between the second color resists 62 and the third color resists 63 by setting the above-mentioned adjacent second color resists 62 and third color resists 63 to partially overlap at the position between the second color sub-pixel region 12 and the third color sub-pixel region 13 and using the overlapping portions of the second color resists 62 and the third color resists 63 to filter the light rays emitted thereto, i.e., can prevent the color mixing between the light rays emitted from the second color resists 62 and the third color resists 63 without setting a black matrix between the second color resists 62 and the third color resists 63.
For example, as shown in fig. 2, fig. 6, fig. 8 and fig. 9, the display panel further includes a planarization layer 8 located on a side of the quantum dot film layer 3 close to the retaining wall structure 4, and the planarization layer 8 is disposed to prevent an obvious uneven structure from occurring inside the display panel, so that the light emitted from the backlight 2 is emitted to different positions with the same effect as possible.
As shown in fig. 12, fig. 12 is a schematic view of a display device according to an embodiment of the present invention, where the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 12 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.
In the display device provided by the embodiment of the invention, the first retaining wall is arranged between the first color sub-pixel region of the display panel and the sub-pixel region adjacent to the first color sub-pixel region, such as the second color sub-pixel region and/or the third color sub-pixel region, so that the problem of crosstalk between lights of different colors emitted from the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region is solved. Moreover, when the display device is pressed, the first retaining wall can also play a role in supporting the display panel, so that devices including a backlight source in the display panel are prevented from being crushed, and the display panel has certain pressure resistance.
Alternatively, in the embodiment of the present invention, the first retaining wall may be disposed between the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region, the second retaining wall may be disposed between the second color sub-pixel region and the third color sub-pixel region, and the height of the first retaining wall is greater than the height of the second retaining wall, so that not only the crosstalk problem between the lights of different colors emitted from the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region is improved, but also the crosstalk problem between the lights of the second color and the third color emitted from the second color sub-pixel region and the third color sub-pixel region is improved. Moreover, when the display panel receives to press, at first by the higher first barricade bearing pressure of height, when pressure reaches the threshold value of the pressure that first barricade can bear, the lower second barricade of height also is as load part bearing pressure, compare with highly setting up first barricade and second barricade to the same scheme, this scheme of adoption, through the cooperation of the first barricade of high difference and second barricade, can make display panel's compressive capacity obtain improving, improve this display device's mechanical strength.
Moreover, on the basis of ensuring the mechanical strength of the display device, the scheme of the embodiment of the invention does not need to set the heights of the first retaining wall and the second retaining wall to be too large, so that the thickness of the display device can be prevented from being too thick, and the thinning design of the display device is facilitated.
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 (15)
1. A display panel, comprising:
the pixel unit areas are arranged in an array mode and comprise a first color sub-pixel area, a second color sub-pixel area and a third color sub-pixel area;
the display panel further comprises a backlight source and a quantum dot color film layer positioned on the light emitting side of the backlight source, wherein the backlight source is overlapped with the first color sub-pixel area, the second color sub-pixel area and the third color sub-pixel area; the quantum dot color film layer comprises a first color film, a second color quantum dot color film and a third color quantum dot color film; the first color film covers the first color sub-pixel region, the second color quantum dot color film covers the second color sub-pixel region, and the third color quantum dot color film covers the third color sub-pixel region;
the retaining wall structure is positioned between the backlight source and the quantum dot color film layer;
the retaining wall structure comprises a first retaining wall and a second retaining wall, the projection of the first retaining wall on the plane of the display panel is positioned between the first color sub-pixel area and the projection of the sub-pixel area adjacent to the first color sub-pixel area and different colors on the plane of the display panel, the projection of the second retaining wall on the plane of the display panel is only positioned between the projection of the second color sub-pixel area and the projection of the third color sub-pixel area on the plane of the display panel, and the height of the first retaining wall is greater than that of the second retaining wall;
the backlight is used for emitting light of a first color.
2. The display panel according to claim 1,
the retaining wall structure comprises a light-tight material.
3. The display panel according to claim 1,
the distance between the first color sub-pixel region and the sub-pixel region which is adjacent to the first color sub-pixel region and has different colors is larger than the distance between the second color sub-pixel region and the third color sub-pixel region.
4. The display panel according to claim 1,
the backlight source includes light emitting diodes.
5. The display panel according to claim 1,
the backlight includes an organic light emitting layer.
6. The display panel according to claim 5,
the first color sub-pixel region, the second color sub-pixel region and the third color sub-pixel region each include a first electrode, a common layer and a second electrode which are stacked, the first electrodes located in the first color sub-pixel region, the second color sub-pixel region and the third color sub-pixel region are independent of each other, the second electrodes located in the first color sub-pixel region, the second color sub-pixel region and the third color sub-pixel region are connected to each other, and the common layers located in the first color sub-pixel region, the second color sub-pixel region and the third color sub-pixel region are connected to each other; the organic light-emitting layer is positioned between the first electrode and the second electrode, and the common layer is positioned on one side of the organic light-emitting layer facing the first electrode and/or the second electrode; the common layer covers the retaining wall structure;
the projection of the second color quantum dot color film and the first electrode positioned in the second color sub-pixel area on the plane of the display panel are overlapped;
the projection of the third color quantum dot color film and the first electrode positioned in the third color sub-pixel area on the plane of the display panel are overlapped;
the distance between the first electrodes of the first color sub-pixel region and the sub-pixel region adjacent to the first color sub-pixel region and different in color is larger than the distance between the first electrodes of the second color sub-pixel region and the third color sub-pixel region.
7. The display panel according to claim 6,
the display panel also comprises a pixel definition layer positioned between the retaining wall structure and the backlight source, wherein the pixel definition layer comprises a plurality of opening areas and non-opening areas which are alternately arranged;
the organic light emitting layer is at least located in the opening region;
the retaining wall structure is located in the non-opening area.
8. The display panel according to claim 1,
the area of the first color sub-pixel region is smaller than the areas of the second color sub-pixel region and the third color sub-pixel region.
9. The display panel according to claim 1,
the centers of the first color sub-pixel region, the second color sub-pixel region, and the third color sub-pixel region are not collinear.
10. The display panel according to claim 9,
the pixel unit areas are arrayed along a first direction and a second direction, and the first direction and the second direction are intersected;
in one pixel unit region, the first color sub-pixel region and the second color sub-pixel region are arranged along the first direction, and the first color sub-pixel region and the third color sub-pixel region are arranged along the second direction.
11. The display panel according to claim 9,
the shape of the first color sub-pixel area is a quadrangle;
the second color sub-pixel region is hexagonal in shape;
the third color sub-pixel region is octagonal in shape.
12. The display panel according to claim 11,
the first color sub-pixel region comprises a first edge, the second color sub-pixel region comprises a second edge near the first edge, and the second edge is parallel to the first edge;
the first color sub-pixel region further comprises a third edge adjacent to the first edge, the third color sub-pixel region comprises a fourth edge near the third edge, the fourth edge is parallel to the third edge;
the second color sub-pixel region further includes a fifth edge adjacent to the second edge, the third color sub-pixel region further includes a sixth edge adjacent to the fourth edge, and the fifth edge is parallel to the sixth edge.
13. The display panel of claim 1, further comprising a color resist layer, wherein the color resist layer comprises a second color resist overlapping the second color quantum dot color film and a third color resist overlapping the third color quantum dot color film.
14. The display panel according to claim 13, wherein the adjacent second color resists and the adjacent third color resists partially overlap at a position between the second color sub-pixel region and the third color sub-pixel region.
15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.
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| CN110288904B (en) * | 2019-06-28 | 2022-01-28 | 上海天马微电子有限公司 | Display panel and display device |
| CN111028695B (en) * | 2019-12-30 | 2021-09-28 | 上海天马微电子有限公司 | Display panel, display method thereof and display device |
| CN111490090B (en) * | 2020-04-30 | 2022-12-16 | 上海天马微电子有限公司 | Display panel and display device |
| CN112133734B (en) * | 2020-09-29 | 2022-08-30 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| WO2022267054A1 (en) * | 2021-06-25 | 2022-12-29 | 京东方科技集团股份有限公司 | Display substrate, display panel, and display apparatus |
| CN113658987A (en) * | 2021-08-17 | 2021-11-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
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