CN112216210B - Color film substrate, display panel and display device - Google Patents
Color film substrate, display panel and display device Download PDFInfo
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- CN112216210B CN112216210B CN202011094806.3A CN202011094806A CN112216210B CN 112216210 B CN112216210 B CN 112216210B CN 202011094806 A CN202011094806 A CN 202011094806A CN 112216210 B CN112216210 B CN 112216210B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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Abstract
The invention provides a color film substrate, a display panel and a display device. In the direction perpendicular to the plane of the substrate, the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor, and the first part of the first color resistor is overlapped with the first part of the second color resistor to form a first overlapped part. In this scheme, first overlap portion department, the first portion that first look hinders is located the one side that the base plate was kept away from to the first portion that the second look hinders for along perpendicular to base plate place plane and keep away from the direction of base plate, the first portion overlap joint of the great first look of thickness of geometric center is on the first portion of the less second look of thickness of geometric center hinders, makes in this scheme, the slope of first look hinders more gently, has slowed down the colour separation phenomenon.
Description
Technical Field
The invention relates to the technical field of display, in particular to a color film substrate, a display panel and a display device.
Background
Light extraction efficiency is an important index of the display panel, and currently, in order to reduce the reflectivity of the display panel, a circular polarizer is attached to the light-emitting surface of the display panel, but in this way, the circular polarizer absorbs 1/2 of the emitted light, thereby reducing the light extraction efficiency of the display panel. In addition, in order to reduce the reflectivity of the display panel, a color film may be disposed on the light-emitting surface of the display panel, for example, a red color film is disposed at a position where the light-emitting surface corresponds to the red sub-pixel, a green color film is disposed at a position where the light-emitting surface corresponds to the green sub-pixel, and a blue color film is disposed at a position where the light-emitting surface corresponds to the blue sub-pixel. However, in the current color film method, color separation occurs when the display panel is in a dark state, which affects the quality of the display panel.
Disclosure of Invention
In view of the above, the present invention provides a color film substrate, a display panel and a display device, which can reduce the color separation phenomenon.
In order to achieve the purpose, the invention provides the following technical scheme:
a color filter substrate, comprising: the color filter comprises a substrate, a color resistance layer and a first overlapping part, wherein the color resistance layer comprises a plurality of color resistances and is positioned on one side of the substrate, and the color resistances comprise a first color resistance and a second color resistance. The first part of the first color resistance and the first part of the second color resistance are overlapped at the first overlapping part, and the first part of the first color resistance is positioned on one side, far away from the substrate, of the first part of the second color resistance; and along the direction perpendicular to the plane of the substrate, the thickness of the geometric center of the first color resistor is greater than that of the geometric center of the second color resistor.
A display panel comprises the color film substrate.
A display device comprises the display panel.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the color film substrate provided by the invention, the color resistance layer comprising the plurality of color resistances is arranged on one side of the substrate, wherein the color resistances comprise the first color resistance and the second color resistance. In the direction perpendicular to the plane of the substrate, the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor, and the first part of the first color resistor is overlapped with the first part of the second color resistor to form a first overlapped part. It is worth mentioning that, in this scheme, first overlap portion department, the first portion of first look resistance is located the first portion of second look resistance and keeps away from one side of base plate for along perpendicular to base plate place plane and keep away from in the direction of base plate, the overlap joint of the first portion of the great first look resistance of thickness of geometric center is in the first portion of the less second look resistance of thickness of geometric center, makes in this scheme, and the slope of first look resistance is gentler, has slowed down the color separation phenomenon.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a conventional display panel;
fig. 2 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 3 is a schematic partial cross-sectional view of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a propagation path of light entering a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating another exemplary propagation path of light entering a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a propagation path of a light entering a display panel according to another embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a propagation path of light entering a display panel according to another embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a propagation path of a light beam entering a display panel according to another embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of a color filter substrate according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of another color filter substrate according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a color resistor according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another color resistor according to an embodiment of the present invention;
fig. 13 is a schematic cross-sectional view of another color filter substrate according to an embodiment of the disclosure;
fig. 14 is a schematic cross-sectional view of another color filter substrate according to an embodiment of the present disclosure;
fig. 15 is a schematic cross-sectional view of another color filter substrate according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 17 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
As background art, in the existing scheme of reducing the reflectivity of the display panel by using a color film, a color separation phenomenon occurs when the display panel is in a dark state, and thus the quality of the display panel is affected.
Based on this, the invention provides a color film substrate, which comprises: the color filter comprises a substrate, a color resistance layer and a first overlapping part, wherein the color resistance layer comprises a plurality of color resistances and is positioned on one side of the substrate, and the color resistances comprise a first color resistance and a second color resistance. The first part of the first color resistance and the first part of the second color resistance are overlapped at the first overlapping part, and the first part of the first color resistance is positioned on one side, far away from the substrate, of the first part of the second color resistance; and the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor along the direction perpendicular to the plane of the substrate.
The invention also provides a display panel which comprises the color film substrate.
The invention also provides a display device comprising the display panel.
According to the color film substrate provided by the invention, the color resistance layer comprising the plurality of color resistances is arranged on one side of the substrate, wherein the color resistances comprise the first color resistance and the second color resistance. In the direction perpendicular to the plane of the substrate, the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor, and the first part of the first color resistor is overlapped with the first part of the second color resistor to form a first overlapped part. It is worth mentioning that, in the scheme, at the first overlapping portion, the first portion of the first color resistor with the larger thickness at the geometric center is located at the first portion of the second color resistor with the smaller thickness at the geometric center and is far away from one side of the substrate, so that in the direction perpendicular to the plane where the substrate is located and far away from the substrate, the first portion of the first color resistor with the larger thickness at the geometric center is lapped on the first portion of the second color resistor with the smaller thickness at the geometric center, so that in the scheme, the influence of the thickness of the distance substrate at the first portion of the first color resistor to the thickness of the distance substrate at the first portion of the second color resistor is smaller, the gradient of the first color resistor is more gradual, and the color separation phenomenon is slowed down.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the above is the core idea of the present invention, and the above objects, features and advantages of the present invention can be more clearly understood. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a conventional display panel, which is introduced by taking subpixels as three different colors, for example, in fig. 1, the display panel includes a red subpixel 11, a green subpixel 12 and a blue subpixel 13. Specifically, in the display panel, the red color film 111 is disposed at a position where the light-emitting surface corresponds to the red subpixel 11, the green color film 121 is disposed at a position where the light-emitting surface corresponds to the green subpixel 12, and the blue color film 131 is disposed at a position where the light-emitting surface corresponds to the blue subpixel 13, so that the light-emitting efficiency of the display panel is improved by disposing the color films. However, as described in the background art, the conventional display panel may have a color separation phenomenon.
Based on this, the inventors examined the cause of color separation in the conventional display panel and found that: in general, when preparing each color film, the color films are coated one by one according to the color of the color film, for example, a red color film is coated first, a blue color film is coated later, and a green color film is coated last, or for example, a blue color film is coated first, a red color film is coated later, and a green color film is coated last, etc., which are not exhaustive herein. In this embodiment, the reason why the color separation occurs in the conventional display panel is analyzed by taking a random application order of the color films as an example, and referring to fig. 2, in this display panel, a red color film 211 is first formed on a substrate, a green color film 221 is formed on the substrate on which the red color film 211 is formed, and finally a blue color film 231 is formed on the substrate on which the red color film 211 and the green color film 221 are formed. The preparation process of the color film is as follows: the solidification is carried out from the liquid state. Due to different preparation sequences of the color films, the color films coated later are affected by the edge portions of the adjacent color films cured first in the curing process, so that the surfaces of the color films, which are far away from the substrate, are not flat surfaces, as shown in fig. 2, the surfaces of the color films, which are far away from the substrate, have different slopes, and the slopes of the surfaces of the different color films are different in size.
The inventor finds that light rays vertically incident to the display panel are refracted after passing through surfaces with different gradients on the color film, and finally the light rays emitted out of the color film are not perpendicular to the light emitting surface of the display panel, so that the color separation phenomenon occurs. That is, the color separation of the current display panel occurs because the color film has the surface with different slopes.
Further, the inventor also finds that, according to different design requirements, the thicknesses of the color films of different colors are usually different, for example, in fig. 2, the thickness of the red color film 211 may be set to be greater than the thickness of the blue color film 231, and the thickness of the blue color film 231 may be set to be greater than the thickness of the green color film 221. Of course, in addition to the thickness relationship of the color films of the colors shown in fig. 2, the thickness of the color film may also be designed according to different design requirements, for example, the thickness of the green color film is equal to the thickness of the red color film, and the thickness of the red color film is less than the thickness of the blue color film, which is not exhaustive herein.
In this embodiment, the thickness of the color films with different colors shown in fig. 2 is used for illustration, as described above, in any of the blue color film 231, the green color film 221, and the red color film 211, there is an overlapping area at the edge of the adjacent color film, so that a surface with different slopes is formed on the side of the color film away from the substrate in the overlapping area, and in conjunction with fig. 2, the inventor finds that the size of the slope at the overlapping position of the two adjacent color films is related to the thickness of the two color films.
Taking the blue color film 231 as an example, the surface of the blue color film 231 away from the substrate at least includes a first surface 2311 with a first slope, a second surface 2312 with a second slope, and a third surface 2313 with a third slope. The first portion 231a of the blue color film 231 is overlapped with the first portion 211a of the adjacent red color film 211, and in this example, the red color film 211 is coated first, and the blue color film 231 is coated after the red color film 211 is cured, so that the first portion 231a of the blue color film 231 is located on the side of the first portion 211a of the red color film 211 away from the substrate, and further, the height H1 of the first portion 231a of the blue color film 231 from the substrate is affected by the first portion 211a of the red color film 211.
It should be noted that the thickness of the color film referred to herein refers to the thickness at the geometric center of the color film, that is, in this embodiment, the thickness at the geometric center is defined as the thickness of the color film. For example, in fig. 2, the geometric center of the blue color film 231 is a position corresponding to the second surface with the second slope, and the thickness of the blue color film 231 is a height H2 from the substrate of the second surface 2312 with the second slope at the geometric center.
In addition, in this display panel, two adjacent color films partially overlap to form a light-shielding portion, as shown in fig. 2, the first portion 231a of the blue color film 231 overlaps the first portion 211a of the red color film 211 to form an area a11, and the material properties of the two adjacent color films are set so that the area a11 is a light-shielding area. As the name implies, the function of the shading area is to shade the array layer in the display panel, which can prevent the incident light from affecting the channels of the transistors in the array layer, and can also shade the metal wires in the array layer, so as to prevent the wires from being visible to naked eyes on the light-emitting side of the display panel.
In summary, the color separation of the display panel caused by the inventors is related to the slope of the surface of the color film far from the substrate and the thickness of the color film in the display panel. Specifically, with reference to fig. 3-8, the parsing process is as follows:
taking the blue color film 231 in fig. 2 as an example, the principle of color separation of the color film is described, as shown in fig. 3, according to the difference of the surface slopes of the color film, the color film may be divided into a first portion 131a having a first slope K1, a second portion 131b having a second slope K2, and a third portion 131c having a third slope K3. Then, according to the light transmission condition of the color film, the blue color film can be divided into a light transmission region 131d and a light shielding region 131e. The blue color film can be divided into a region (1), a region (2), a region (3), a region (4) and a region (5) by comprehensively considering two dimensions of gradient and light transmission. Wherein the region (1) and the region (2) constitute a first part 131a having a first slope K1 (as marked with bold black in fig. 2), the region (3) is a second part 131b having a second slope K2, and the region (4) and the region (5) constitute a third part 131c having a third slope K3. Note that, in the present embodiment, the "first portion" and the "first portion" are two different concepts, for example, in fig. 3, the third portion 131c includes a region (4) and a region (5), where the region (5) is the first portion 231a in fig. 2.
Further, the inventors investigated the cause of color separation from the differences (region (1) to region (5)) of the light incidence regions:
as shown in fig. 4, when a light ray 1 enters the region (1), since the refractive index n2 of the color film 431 is different from the refractive index n1 of the film layer on the upper surface of the color film 431, the light ray 1 is refracted in the region (1) in the color film 431, and when the light ray 1 enters from the flat upper surface in the region (1), the extending direction of the light ray 2 entering the color film 431 is also downward, and since the region (1) is an area overlapping with the adjacent color film 432, the light ray 2 is a light ray transmitted through the blue color film 431, and a color film of another color is provided on the side of the blue color film 431 close to the substrate, such as the green color film 432 or the red color film 433, so that the light ray 2 cannot transmit a color film of another color other than blue, that is, the light ray 2 does not continue to propagate through a color film of another color on the side of the blue color film 431 close to the substrate.
When the light 3 vertically enters the surface with the first slope in the area (1), because the area (1) has a certain slope, the propagation direction of the refracted light in the color film 431 can be divided into two cases:
first, when the refractive index n1 of the film layer on the upper surface of the color film is smaller than the refractive index n2 of the color film, according to the law of refraction, the refraction angle β in the color film is smaller than the incident angle α of the upper surface of the color film, and when the extending direction of the refracted ray 4 in the color film is still located in the region (1), the refracted ray 4 cannot continue to propagate in the green color film 432 located on the side of the blue color film 431 close to the substrate.
Second, when the refractive index n1 of the film on the top surface of the color filter is greater than the refractive index n2 of the color filter, and the refractive angle β in the color filter is greater than the incident angle α on the top surface of the color filter, according to the law of refraction, and when the extending direction of the refractive light in the color filter passes through the region (2), as shown in fig. 5, the refractive light can continue to propagate from the region (2), and continue to refract light at the bottom surface of the region (2) and the film on the bottom surface of the region (2), until the refractive light encounters the reflector (which may be a metal layer closest to the bottom surface of the color filter), and the refractive light is reflected, according to the principle of light reflection, the angle between the reflected light and the normal is the same as the angle between the refractive light incident on the reflector and the normal, and then the reflected light reaches the bottom surface of the color filter through refraction layer by layer, and since the light path of the reflected light is symmetrical to the light path of the refractive light emitted from the bottom surface of the color filter, in fig. 5, the refractive light 6 and the refractive light in the layers continue to propagate, and when the light path of the light in the color filter reaches the normal path of the light emitted from the bottom surface of the color filter, the light path of the color filter, the light path is not separated by 90, and the upper surface of the color filter, the upper surface, the light ray 7, and the upper surface is not separated by 90.
It should be noted that the inventor found that the refracted light ray 7 in fig. 5 is emitted from the region (3) with a flat surface, and when the refracted light ray 9 is emitted from the first slope in the region (2), the light transmission path can be as shown in fig. 6 and fig. 7, and at this time, the reflected light rays are emitted to different directions, and the color separation phenomenon of the light rays is more obvious. Based on this, the reflected light of the light rays of different colors will be directed in different directions, and a color separation phenomenon of the reflected light occurs.
Further, the inventors further analyzed the phenomenon that the degree of light color separation at the slope is more severe than that of the flat surface, as shown in fig. 8, in which the first slope of the color film in fig. 8 is K1', and the degree of light color separation is analyzed with K1' > K1 as an example, compared to the case where the first slope of the color film in fig. 7 is K1. In fig. 8, the refracted light ray 11 is a light ray extending in the same direction as the refracted light ray 9 in fig. 7, that is, in fig. 7, the angle between the refracted light ray 9 and the normal is θ, and in fig. 8, the angle between the refracted light ray 11 and the normal is also θ. Since the slope of the color film in fig. 8 is greater than the slope of the color film in fig. 6, the incident angle η of the light ray 11 at the slope of the color film is greater than the incident angle η 1 of the light ray 9 at the slope of the color film, and under the condition that the refractive indexes of the film layers in fig. 8 and 7 are not changed, the included angle epsilon between the light ray 12 and the normal is greater than the included angle epsilon 1 between the light ray 10 and the normal. That is, when the propagation directions of incident light rays in the color film are the same, the larger the gradient of the color film is, the more obvious the color separation phenomenon of light is.
With reference to fig. 4, the transmission path of the refracted light in the light incident region (1) is described above, and please refer to fig. 4, the light may also be incident into the color film 431 from the regions (2), (3), (4) and (5), wherein after the light incident region (2), the propagation path of the refracted light also includes a case where the extending direction of the refracted light is located in the region (1), and the extending direction of the refracted light passes through other film layers below the region (2), which is not described herein repeatedly.
When the light ray vertically enters the area (3), the extending direction of the light ray entering the color film 431 is also vertically downward, and the light ray is refracted layer by layer, when the refracted light ray meets the reflecting layer, the light ray is reflected, according to the principle that the light path is reversible, the reflected light ray is refracted layer by layer, and the direction of the light ray exiting the color film 431 is vertically upward, that is, when the light ray vertically enters the area (3), the incident direction of the light ray is parallel to the emergent direction of the reflected light ray, and the vertically incident light ray can not generate the color separation phenomenon.
When light vertically enters the area (4), because the surface of the area (4) far away from the substrate is a slope, the principle of the transmission path of the light in the area (4) is the same as that of the transmission path of the light in the area (2), except that the slopes of the area (2) and the area (4) may be different. Specifically, the light incident into the color film 431 is refracted in the color film 431, and the extending direction of the light entering the color film 431 can be as shown in fig. 4, and the refracted light is cut off to the overlapping portion. The refracted light may exit the color film 431 through the region (4) or the region (3). As analyzed above, the incident light at the slope is refracted, and the color separation occurs, and the larger the gradient of the color film is, the more obvious the color separation of the light is.
When the light ray vertically enters the region (5), the light ray refraction path is the same in principle as the light ray refraction path when the light ray 1 vertically enters the region (1), and the description is not repeated here.
In summary, it can be seen that some of the light rays of the first portion and the third portion of the vertically incident color filter stop propagating in the regions (1) and (5), the other light rays may generate color separation on the surface of the color filter away from the substrate, and the light rays of the second portion of the vertically incident color filter may not generate color separation. Therefore, the inventor finds that the color separation occurs in the current display panel because the color film has the surface with different slopes. And, under the condition that the extending direction of the refracted light is the same, the larger the gradient of the color film is, the more obvious the color separation phenomenon of the light is.
Accordingly, in order to improve the phenomenon of color separation of a display panel using a color filter, as shown in fig. 9, an embodiment of the present invention provides a color filter substrate, where the color filter substrate includes a substrate 91, a color resist layer 92, and a first overlapping portion 93. The color-resist layer 92 is located on one side of the substrate 91 and includes a plurality of color resists. In this embodiment, the substrate 91 may be a flexible substrate or a rigid substrate, and the color-resist layer is directly formed on the substrate. In addition, the substrate 91 in this embodiment may also refer to any film layer in the display panel, for example, when the substrate in this embodiment is a layer far from the light emitting element in the thin film encapsulation layer, the color resistance layer may be directly prepared on a surface of the layer far from the light emitting element in the thin film encapsulation layer.
In the embodiment, the color resistors comprise a first color resistor 911 and a second color resistor 912, and in the direction X perpendicular to the plane of the substrate, the thickness of the first color resistor 911 at the geometric center is greater than that of the second color resistor 912. And the first portion 911a of the first color resist 911 overlaps the first portion 912a of the second color resist to form the first overlapped portion 93. It should be noted that, in the present embodiment, the coating sequence of the first color resistor 911 and the second color resistor 912 is set according to the thickness of the geometric center of the first color resistor 911 and the second color resistor 912, so as to smooth the slope of the slope on the color resistor, and further improve the color separation phenomenon.
Specifically, in this embodiment, the second color resist 912 with a small thickness at the geometric center is coated on the substrate 91 first, and then the first color resist 911 with a large thickness at the geometric center is coated. It should be noted that, in this embodiment, the concept of large thickness and small thickness is relative, and the thickness at the geometric center of the first color resistor 911 is compared with the thickness at the geometric center of the second color resistor 912, the color resistor with large thickness therebetween is referred to as the color resistor with large thickness at the geometric center, and the color resistor with small thickness therebetween is referred to as the color resistor with small thickness at the geometric center. In this embodiment, since the first color resist 911 with a larger thickness at the geometric center is formed on the substrate coated with the second color resist 912 with a smaller thickness at the geometric center, the first portion 911a of the first color resist 911 is located at the overlapping portion 93 of the first color resist 911 and the second color resist 912 on the side of the first portion 912a of the second color resist away from the substrate.
In this embodiment, since the thickness of the second color resist 912 at the geometric center is smaller than that of the first color resist 911, when the second color resist 912 is coated on the substrate, the second color resist 912 is changed from a liquid state to a solid state, and at this time, the slope of the second color resist 912 on the side close to the first color resist is naturally formed without being affected by the height of the first portion 911a of the first color resist 911.
Referring to fig. 9 and fig. 2, schematically, the first portion 231a of the blue color resistor 231 in fig. 2 is located on a side of the first portion 211a of the red color resistor 211 away from the substrate, so that the height of the first portion 231a of the blue color resistor 231 is influenced by the height of the first portion 211a of the red color resistor 211, and at this time, the height H1 of the first portion 231a of the blue color resistor 231 from the substrate in fig. 2 is greater than the height H3 of the first portion 912a of the second color resistor 912 from the substrate in fig. 9. Specifically, in fig. 9, a first portion 912a of the second color resist 912 is formed directly on the substrate 91, which is naturally formed when the color resist is cured. In fig. 2, the first portion 231a of the blue color resistor 231 is formed on the side of the first portion 211a of the red color resistor 211 away from the substrate, such that the height H1 of the first portion 231a of the blue color resistor is greater than the height H3 of the first portion when the first portion is naturally formed on the substrate, and assuming that the thickness H3 at the geometric center of the second color resistor 912 in fig. 9 is the same as the thickness H2 at the geometric center of the blue color resistor 231 in fig. 2, no slope is formed at the first portion 912a of the second color resistor in fig. 9, and a third surface 2313 with a third slope is formed between the first portion 231a and the geometric center of the blue color resistor 231 in fig. 2.
As described above, when the propagation directions of incident light in the color resistors are the same, the slope of the color resistors is larger, and the color separation phenomenon of light is more obvious, so that in the color film substrate provided by the present disclosure, the coating order of the color resistors can be set according to the thicknesses of the color resistors, so that in the first overlapping portion, the first portion of the color resistor with the smaller thickness at the geometric center is located on the side close to the substrate, and the first portion of the color resistor with the larger thickness at the geometric center is located on the side away from the substrate, so that the first portion of the color resistor with the smaller thickness at the geometric center is not affected by the first portion of the color resistor with the larger thickness at the geometric center, the slope in the color resistor with the smaller thickness at the geometric center is reduced, and the color separation phenomenon of light is slowed down.
On the basis of the above embodiment, as shown in fig. 9, in this scheme, both the first color resistor 911 and the second color resistor 912 may include at least one slope, and the slope of each slope may be the same or different, for example, the first color resistor 911 includes a slope K4 and a slope K5, and the second color resistor 912 includes a slope K1. In addition, in the embodiment, the slope in the color resistor can be naturally formed during curing of the color resistor, the process difficulty of preparing the color resistor is not required to be increased at the moment, and the preparation of the color resistor in the scheme can be completed by adopting the existing preparation process of the color resistor.
Preferably, because the preparation order of the color resistance of different thickness is injectd in this scheme to combine the preparation technology of current color resistance, when the color resistance forms naturally, make in this scheme the color resistance keep away from the slope value less than or equal to tan50 of the above-mentioned slope of the surface formation of base plate, each slope is all comparatively gentle this moment, and then can slow down the color separation phenomenon of light.
As described above, when the propagation direction of the incident light in the color film is the same, the color separation phenomenon of light becomes more obvious as the gradient of the color film is larger. Therefore, in this embodiment, the shapes of the first portion of the first color resistor and the first portion of the second color resistor may be further defined, so that the height of the first overlapping portion is reduced, and under the condition that the thickness of the geometric center is not changed, the height reduction of the first overlapping portion reduces the height difference between the first overlapping portion and the geometric center, so as to reduce the slope of the first color resistor, which is close to the first overlapping portion.
As shown in fig. 10, in the color filter substrate according to the embodiment of the present invention, the first portion of the first color resistor is set to be in a rising wedge shape, and the first portion of the second color resistor is set to be in a falling wedge shape. So that the first part of the first color resistor flows into the groove gap formed by the first part of the second color resistor during curing under the condition that the height H3 of the first part of the second color resistor is not changed, and further, the height difference H6 between the first part 1011a of the cured first color resistor 1011 and the geometric center of the first color resistor is smaller than the height difference H4 between the first part 1011a of the cured first color resistor and the geometric center of the first color resistor during natural formation of the color resistor (see FIG. 9). As described above, when the height difference of the first portion is decreased, the slope of the slope is smaller than that of the slope in the figure, and the slope of the color resistance is decreased, so that the color separation phenomenon of light can be improved.
Specifically, as shown in fig. 11 and 12, the rising wedge and the falling wedge will be explained. In fig. 11, the first portion of the color resistor is a rising wedge, and the distance from the first portion to the bottom surface of the color resistor is gradually increased along the X1 direction in the figure with the bottom surface of the color resistor as a reference. The first portion of the color resistor in fig. 12 is a descending wedge, and the distance from the bottom surface of the color resistor is gradually reduced along the direction X2 with reference to the bottom surface of the color resistor.
In the color filter substrate provided by the embodiment, the first portions of the two adjacent color resistors are overlapped to form the light shielding portion, and the array layer and the routing lines in the display panel are shielded by the overlapping portion. In addition, as shown in fig. 13, the color filter substrate provided in the embodiment of the present invention may further include a black matrix, where the black matrix is disposed on a side of the first overlapping portion close to the substrate, and at least partially overlaps the first overlapping portion. In this embodiment, the array layer and the wiring in the display panel are shielded by the black matrix, so as to avoid light leakage and improve the shading effect. In this embodiment, the thickness of the black matrix along a direction perpendicular to the plane of the substrate is preferably greater than 0.5 μm, so that the black matrix can meet the requirement of shading.
On the basis of the foregoing embodiment, the color film substrate provided in the embodiment of the present invention can further reduce reflection of light by the first overlapping portion. Specifically, as shown in fig. 14, the refractive index of the black matrix is defined as n1, the refractive index of the first color resistor is defined as n2, the refractive index of the second color resistor is defined as n3, | n1-n2 | < | n1-n3 |, and along the first direction, the overlapping width D1 of the first color resistor and the black matrix is greater than the overlapping width D2 of the second color resistor and the black matrix, so as to reduce the reflection of the first overlapping portion to light, and improve the display effect of the display panel.
Further, fig. 9 is introduced by taking an example that the first portions of the adjacent color resistors in the color filter substrate are overlapped, and besides, the color filter substrate provided in the embodiment of the present invention may further include a third color resistor 1513 as shown in fig. 15. The thickness of the third color resistor 1513 at the geometric center is smaller than the thickness of the second color resistor 1512, and the first portion 1513a of the third color resistor 1513 overlaps the second portion 1512b of the second color resistor 1512 to form a second overlapping portion 151. In the second overlapping portion 151, a first portion 1513a of the third color filter 1513 is located on a side of the second portion 1512b of the second color filter 1512 close to the substrate.
Except for this, the positional relationship between the first color resistor and the second color resistor in fig. 15 is the same as that in fig. 9, specifically: the thickness at the geometric center of the first color resistor 1511 is greater than the thickness at the geometric center of the second color resistor 1512. And the first portion 1511a of the first color resistor 1511 overlaps the first portion 1512a of the second color resistor 1512 to form a first overlap 151. In the first overlapping portion 151, a first portion 1511a of the first color resist 1511 is located on a side of the first portion 1512a of the second color resist 1512 away from the substrate.
It is worth mentioning that in this embodiment, the thickness at the geometric center of the third color resistor 1513, the thickness at the geometric center of the second color resistor 1512, and the thickness at the geometric center of the first color resistor 1511 sequentially increase. Since the thickness of the third color resistor 1513 at the geometric center is the smallest among the three color resistors, when the second color resistor is coated, the distance from the second portion 1512b of the second color resistor 1512 to the substrate is only affected by the first portion 1513a of the third color resistor 1513 with the smallest thickness, and the distance from the first portion 1512a of the second color resistor 1512 to the substrate is only affected by the black matrix, in other words, the distance from the first portion 1512a of the second color resistor 1512 to the substrate is not affected by the first color resistor and the third color resistor. Then, during coating of the first color resist 1511, the first portion 1511a of the first color resist 1511 is affected only by the first portion 1512a of the second color resist 1512, and the second portion 1511 of the first color resist 1511 is affected only by the third color resist.
In this embodiment, the thickness of the geometric center of the third color resistor 1513 is smaller than that of the geometric center of the second color resistor 1512, and the thickness of the geometric center of the second color resistor 1512 is smaller than that of the geometric center of the first color resistor 1511, so that the height of the first portion 1512a of the second color resistor 1512 from the substrate is less influenced by the adjacent color resistor (third color resistor), so that the gradient between the first portion 1512a of the second color resistor 1512 and the geometric center of the second color resistor 1512 is relatively gentle, and the color separation phenomenon is further reduced.
It can be seen that, in the present embodiment, the thicknesses at three different geometric centers are taken as an example, and the setting position and the coating sequence of the color resistors are illustrated, wherein the thickness at the geometric center of the third color resistor 1513 is smaller than the thickness at the geometric center of the second color resistor 1512, and the thickness at the geometric center of the second color resistor 1512 is smaller than the thickness at the geometric center of the first color resistor 1511. In this embodiment, first, the third color resistor 1513 with the lowest thickness at the geometric center is coated, then the second color resistor 1512 is coated on the substrate formed with the third color resistor 1513, and then the first color resistor 1511 is coated on the substrate formed with the third color resistor 1513 and the second color resistor 1512, so that the first portion of the first color resistor with the highest thickness at the geometric center overlaps the side of the first portion of the second color resistor away from the substrate, and the second portion of the first color resistor with the highest thickness at the geometric center overlaps the side of the first portion of the third color resistor away from the substrate, and since the thickness at the geometric center of the first color resistor is the thickest among the three color resistors, the distance from the first portion of the first color resistor to the substrate is relatively less affected by the distance from the first portion of the second color resistor to the substrate than when the color resistor with the smaller thickness is overlapped on the color resistor with the larger thickness, and at the same time, the distance from the second portion of the first color resistor to the substrate is relatively less affected by the first portion of the first color resistor, and the three color resistors are separated relatively less gradually.
In summary, in the color filter substrate provided in this embodiment, based on the thickness of the color resistor at the geometric center, the coating order of the color resistors is defined, so that the third color resistor with the smallest thickness at the geometric center is coated on the substrate first, then the second color resistor with the middle thickness at the geometric center is coated, and finally the first color resistor with the largest thickness at the geometric center is coated, so that the slope of the third color resistor is naturally formed when the third color resistor is formed on the substrate, and the slope in the third color resistor is not affected by the height of the first portion in the other two color resistors. In addition, the slope of the second color resistance with the thickness in the middle at the geometric center is influenced only by the height of the first portion of the third color resistance with the smallest thickness at the geometric center. The slope of the first color resistor with the largest thickness at the geometric center is influenced by the first part of the second color resistor and the second part of the third color resistor, and the influence of the first color resistor with the first part or the second part of the color resistor with the lower thickness is smaller because the thickness at the geometric center of the first color resistor is the largest, so that the slopes on the color resistors in the color film substrate provided by the embodiment of the invention are smooth, and the color separation phenomenon is further slowed down.
Similarly, in this embodiment, the slope value of the slope in the second portion of the first color resistor and/or the third color resistor is less than or equal to tan50 °, so as to further slow down the slope on the color resistor and slow down the color separation phenomenon of the color filter substrate. It should be noted that, in this example, the slope of the side of each color resistor away from the substrate may be processed, for example, polished, after the color resistor is naturally formed, so that the slope of the side of each color resistor away from the substrate has a slope value of tan50 ° or less by setting the coating sequence of the plurality of color resistors with different thicknesses at the geometric center.
On the basis of the foregoing embodiment, as shown in fig. 16, an embodiment of the present invention further provides a display panel, which includes any color filter substrate 161. In addition, the display panel may further include an encapsulation layer 162 and a light emitting layer 163. In this embodiment, the substrate in the color filter substrate 161 may be a film layer of the encapsulation layer 162 that is far away from the light emitting layer 163.
In addition, the display panel may further include a plurality of pixels 16, where the pixels include a first pixel 164 and a second pixel 165, and the first color resistor 1611 covers the first pixel 164 and the second color resistor 1612 covers the second pixel 165 in a direction perpendicular to a plane of the display panel.
In addition, the display panel may further include a first non-light emitting region 167 between the first pixel 164 and the second pixel 165, and a protective layer 168, and the first overlapping portion 169 is located in the first non-light emitting region 167. The protective layer 168 is located on a side of the color resist layer away from the substrate, and the protective layer 168 covers the color resist layer.
It should be noted that the display panel provided by the embodiment of the invention can reduce the reflection of light, and specifically, the inventor combines the relationship between the above reflectivity and the refractive index, and the formula is R = [ (n 1-n 2)/(n 1+ n 2)] 2 Wherein R is the reflectivity, n1 is the refractive index of the first substance, and n2 is the refractive index of the second substance. By setting the overlapping width of the first color resistor 1611 and the protection layer 168 and the overlapping width of the second color resistor 1612 and the protection layer 168, the refraction of the display panel to light is reduced.
Specifically, when the refractive index of the protective layer is fixed (corresponding to the refractive index of the second substance), the smaller the difference between the refractive index of the color resist (corresponding to the refractive index of the first substance) and the refractive index of the protective layer, the smaller the reflectance R. Based on this, in this embodiment, the refractive index of the protection layer, the refractive index of the first color resist, and the refractive index of the second color resist are combined to design the overlapping width between the first color resist and the protection layer and the overlapping width between the second color resist and the protection layer.
Illustratively, the refractive index of the protective layer is set to n4, the refractive index of the first color resist is set to n2, and the refractive index of the second color resist is set to n3. Then, when the refractive index of the first color resist, the refractive index of the second color resist and the refractive index of the protection layer are in the relationship | n4-n2 | n4-n3 |, in the display panel provided in this embodiment, along the first direction, the overlapping width D3 of the first color resist and the first non-light-emitting area is set to be greater than the overlapping width D4 of the second color resist and the first non-light-emitting area, so as to reduce the light reflectivity of the display panel and improve the display efficiency of the display panel.
In addition, an embodiment of the invention further provides a display device P, as shown in fig. 17, including any one of the display panels described above. In the display device, the color resistors are coated in the order of the thickness from small to large, so that the gradient of the slope in the color resistors is reduced, and the color separation phenomenon is slowed down. The display device comprises the display panel provided by any one of the embodiments. The display device includes, but is not limited to, a mobile phone, a tablet computer, a digital camera, and the like.
In summary, the color filter substrate provided by the present invention is provided with a color resistance layer including a plurality of color resistances on one side of the substrate, where the color resistance includes a first color resistance and a second color resistance. In the direction perpendicular to the plane of the substrate, the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor, and the first part of the first color resistor is overlapped with the first part of the second color resistor to form a first overlapped part. It is worth mentioning that, in this scheme, first overlap portion department, the first portion of first look hinders is located the first portion of second look and hinders one side of keeping away from the base plate for along perpendicular to base plate place plane and keep away from the direction of base plate, the overlap joint of the first portion of the great first look of thickness of geometric center hinders on the first portion of the less second look of thickness of geometric center hinders, makes in this scheme, the slope of first look hinders more gently, has slowed down the color separation phenomenon.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A color film substrate is characterized by comprising:
a substrate, a first electrode and a second electrode,
the color resistance layer is positioned on one side of the substrate and comprises a plurality of color resistances, and the color resistances comprise a first color resistance and a second color resistance;
a first overlapping part, wherein the first part of the first color resistor and the first part of the second color resistor are overlapped at the first overlapping part, and the first part of the first color resistor is positioned at one side of the first part of the second color resistor far away from the substrate; the thickness of the geometric center of the first color resistor is larger than that of the geometric center of the second color resistor along the direction perpendicular to the plane of the substrate;
the first part of the first color resistor is in a rising wedge shape, and the first part of the second color resistor is in a falling wedge shape; the first portion of the second color resistor has a groove gap.
2. The color filter substrate according to claim 1, wherein the first portion of the first color resistance and/or the first portion of the second color resistance comprise a first slope K1, wherein K1 is not less than tan50 °.
3. The color filter substrate according to claim 1, comprising a black matrix, wherein the black matrix is located on one side of the first overlapping portion close to the substrate, and the black matrix and the first overlapping portion are at least partially overlapped.
4. The color filter substrate of claim 3, wherein the refractive index of the black matrix is n1, the refractive index of the first color resistor is n2, and the refractive index of the second color resistor is n3,
| n1-n2 | < | n1-n3 |, along a first direction, an overlapping width of the first color resist and the black matrix is D1, an overlapping width of the second color resist and the black matrix is D2, and D1 > D2.
5. The color filter substrate according to claim 3, wherein the thickness of the black matrix is greater than 0.5 μm in a direction perpendicular to a plane of the substrate.
6. The color filter substrate of claim 1, comprising a third color resistor, wherein the thickness of the third color resistor at the geometric center is smaller than the thickness of the second color resistor at the geometric center,
a second overlap section where a first portion of the third color resistor overlaps a second portion of the second color resistor;
the first part of the third color resistance is positioned on one side of the second part of the second color resistance close to the substrate.
7. The color filter substrate of claim 6, wherein the second portion of the first color resistance and/or the first portion of the third color resistance comprise a second slope K2, wherein K2 is not less than tan50 °.
8. A display panel, comprising the color filter substrate according to any one of claims 1 to 7.
9. The display panel according to claim 8, comprising a plurality of pixels, wherein the pixels comprise a first pixel and a second pixel, and the first color resist covers the first pixel and the second color resist covers the second pixel along a direction perpendicular to a plane of the display panel;
a first non-light emitting region between the first pixel and the second pixel, the first overlapping portion being located in the first non-light emitting region;
the protective layer is positioned on one side, far away from the substrate, of the color resistance layer, the protective layer covers the color resistance layer, and the refractive index of the protective layer is n4; the refractive index of the first color resistor is n2, and the refractive index of the second color resistor is n3; wherein | n4-n2 | n4-n3 | is,
along the first direction, the overlapping width of the first color resistor and the first non-luminous area is D3, the overlapping width of the second color resistor and the first non-luminous area is D4, and D3 is larger than D4.
10. A display device characterized by comprising the display panel according to any one of claims 8 or 9.
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