CN111458912B - Display panel and display device - Google Patents
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- CN111458912B CN111458912B CN202010511652.7A CN202010511652A CN111458912B CN 111458912 B CN111458912 B CN 111458912B CN 202010511652 A CN202010511652 A CN 202010511652A CN 111458912 B CN111458912 B CN 111458912B
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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
- G02F1/133512—Light shielding layers, e.g. black matrix
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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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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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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- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
Abstract
The invention discloses a display panel and a display device, the display panel includes: the first substrate comprises a first substrate and a planarization layer positioned on one side of the first substrate; the second substrate is arranged opposite to the first substrate and is positioned on one side, away from the first substrate, of the planarization layer, the second substrate comprises a second substrate, a pixel driving circuit, a color filtering unit and a light shielding layer, and the pixel driving circuit, the color filtering unit and the light shielding layer are positioned on one side, facing the first substrate, of the second substrate; and the display medium layer is clamped between the first substrate and the second substrate, wherein the material of the planarization layer comprises an inorganic material, and the refractive index of the planarization layer is greater than or equal to 1.3 and less than or equal to 1.8. The display panel provided by the invention can effectively improve the metal light leakage phenomenon, improve the display effect and the packaging effect of the display panel and improve the overall quality of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the rapid development of electronic devices such as display panels, people have more requirements on the shapes of the electronic devices, for example, for vehicle-mounted display panels, people have more and more requirements on curved vehicle-mounted display panels.
For a common display panel, the display panel includes an array substrate and a color filter substrate, which are oppositely disposed, wherein the array substrate is provided with a thin film transistor layer, and the color filter substrate is provided with a color filter unit and a black matrix. However, if the panel with such a structure is applied to a curved panel, after the color filter substrate and the array substrate are bent, the relative positions of the color filter substrate and the array substrate may shift, so that the metal layer in the array substrate is exposed in the opening area defined by the black matrix on the color filter substrate, and a metal light leakage phenomenon occurs. In order to improve the metal light leakage phenomenon, people utilize COA (Color filter on Array) technology to improve the problem.
The color filter unit is arranged on the array substrate in the display panel applying the COA technology, and at the moment, if the other substrate arranged opposite to the array substrate is unreasonable in arrangement, light rays passing through the substrate are easy to reflect or external water vapor is easy to enter the display panel, so that the reliability and the overall quality of the display panel are greatly influenced.
Disclosure of Invention
The invention provides a display panel and a display device, which can effectively improve the metal light leakage phenomenon, improve the display effect and the packaging effect of the display panel, and improve the reliability and the overall quality of the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including: a first substrate including a first substrate and a planarization layer on one side of the first substrate; the second substrate is arranged opposite to the first substrate and is positioned on one side, away from the first substrate, of the planarization layer, and comprises a second substrate, a pixel driving circuit, a color filtering unit and a light shielding layer, wherein the pixel driving circuit, the color filtering unit and the light shielding layer are positioned on one side, facing the first substrate, of the second substrate; and the display medium layer is clamped between the first substrate and the second substrate, wherein the material of the planarization layer comprises an inorganic material, and the refractive index of the planarization layer is greater than or equal to 1.3 and less than or equal to 1.8.
On the other hand, an embodiment of the present invention further provides a display device, including the display panel of any one of the foregoing embodiments.
According to the display panel and the display device provided by the embodiment of the invention, the display panel comprises a first substrate, a second substrate and a display medium layer clamped between the first substrate and the second substrate, which are oppositely arranged, the second substrate comprises a second substrate, a pixel driving circuit, a color filtering unit and a light shielding layer, at the moment, the pixel driving circuit, the color filtering unit and the light shielding layer are positioned on the same substrate, when the display panel is bent, the relative position relation between a metal film layer structure in the pixel driving circuit and the light shielding layer cannot be influenced by the relative displacement between the first substrate and the second substrate, and the deformation degrees of the metal film layer structure, the color filtering unit and the light shielding layer positioned on the same substrate are close under the action of the same bending force, so that the metal film layer structure can still be shielded by the light shielding layer in the bending process, the risk that the metal film layer structure is exposed in an opening area is reduced, and the metal light leakage phenomenon is effectively improved. Compared with the mode of improving metal light leakage by increasing the coverage area of the light shielding layer in the prior art, the technical scheme provided by the embodiment of the invention is adopted, and the coverage area of the light shielding layer is not required to be adjusted, so that the display panel still keeps higher aperture opening ratio and has better display performance.
Furthermore, the first substrate comprises a first substrate and a planarization layer located on one side of the first substrate, and the subsequent manufacturing of film layer structures such as the alignment layer and the like is facilitated by the arrangement of the planarization layer. In the embodiment of the invention, the planarization layer is directly contacted with the first substrate, and the refractive index of the planarization layer is greater than or equal to 1.3 and less than or equal to 1.8, so that the refractive index of the planarization layer is close to that of the first substrate, the reflectivity of the interface between the first substrate and the planarization layer can be effectively reduced, the reflection of external environment light is reduced, and the display definition of the display panel is improved. Meanwhile, the material of the planarization layer in the embodiment of the invention comprises an inorganic material, and the planarization layer can be in direct contact with the first substrate, so that the planarization layer can be formed by using high temperature in the film forming process, the compactness of the formed planarization layer is improved, the effect of effectively preventing external water vapor from entering the interior of the display panel is achieved, and the reliability of the display panel is improved.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a top view of a display panel provided in accordance with one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a display panel provided in accordance with an embodiment of the present invention;
FIG. 3 is a graph of the refractive index of a planarizing layer versus the distance of the planarizing layer in a direction away from the first substrate in one embodiment of the invention;
FIG. 4 is a graph of the refractive index of a planarizing layer versus the distance of the planarizing layer in a direction away from the first substrate in another embodiment of the present invention;
FIG. 5 is a graph of the refractive index of a planarizing layer versus the distance of the planarizing layer in a direction away from the first substrate in yet another embodiment of the invention;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
FIG. 8 is a top view of a first substrate provided in accordance with one embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a display panel according to still another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display panel according to still another embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Features of various aspects and exemplary embodiments of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The embodiment of the invention provides a display panel 100 and a display device. The display panel 100 and the display device according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, fig. 1 is a top view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional view of the display panel according to the embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of the display panel in a light-shielding layer region, the cross-sectional view being taken along a direction perpendicular to the display panel. An embodiment of the invention provides a display panel 100, which includes a first substrate 10, a second substrate 20 and a display medium layer 30 sandwiched between the first substrate 10 and the second substrate 20. The Display panel 100 provided in the embodiment of the present invention may be a Liquid Crystal Display panel 100 (LCD), and the corresponding Display medium layer 30 is a Liquid Crystal layer, where the Liquid Crystal layer includes Liquid Crystal molecules, and the Liquid Crystal molecules may be in a rod-like structure. The display panel 100 is used as a liquid crystal display panel for explanation.
The first substrate 10 includes a first substrate 11 and a planarization layer 12 on the first substrate 11 side, and in this case, the planarization layer 12 is on the surface on the first substrate 11 side. The second substrate 20 is located on a side of the planarization layer 12 away from the first substrate 11, the second substrate 20 includes a second substrate 21, a pixel driving circuit 22, a color filter unit 23, and a light shielding layer 29, and the pixel driving circuit 22, the color filter unit 23, and the light shielding layer 29 are located on a side of the second substrate 21 facing the first substrate 10. Wherein the material of the planarization layer 12 includes an inorganic material, and the refractive index of the planarization layer 12 is 1.3 or more and 1.8 or less.
Further, the first substrate 10 further includes a first alignment layer 101 located on a side of the planarization layer 12 away from the first substrate 11, the second substrate 20 further includes a color filter unit 23 and a second alignment layer 201 located on a side of the light shielding layer 29 away from the second substrate 21, and the first alignment layer 101 and the second alignment layer 201 cooperate with each other to drive the liquid crystal molecules to normally turn over.
According to the display panel 100 of the embodiment of the present invention, the display panel 100 includes the first substrate 10, the second substrate 20 and the display medium layer 30 sandwiched between the first substrate 10 and the second substrate 20, the second substrate 20 includes the second substrate 21, the pixel driving circuit 22, the color filter unit 23 and the light shielding layer 29, at this time, the pixel driving circuit 22, the color filter unit 23 and the light shielding layer 29 are located on the same substrate, so that the display panel 100 of the embodiment of the present invention uses the COA technology, when the display panel 100 is bent, the relative position relationship between the metal film layer structure in the pixel driving circuit 22 and the light shielding layer 29 is not affected by the relative displacement between the first substrate 10 and the second substrate 20, and the metal film layer structure located on the same substrate (the second substrate 20), the deformation degree of the color filter unit 23 and the light shielding layer 29 under the same bending force are close, so that the metal film layer structure is still shielded by the light shielding layer 29 in the bending process, thereby reducing the risk of exposing the metal film structure in the opening area LA, and effectively improving the metal light leakage phenomenon. Compared with the prior art in which the metal light leakage is improved by increasing the coverage area of the light shielding layer 29, by adopting the technical scheme provided by the embodiment of the invention, the coverage area of the light shielding layer 29 does not need to be adjusted, so that the display panel 100 still maintains a high aperture ratio and has a better display performance.
Further, the first substrate 10 includes a first substrate 11 and a planarization layer 12 located on one side of the first substrate 11, and the formation of the film layer structure such as an alignment layer is facilitated by the provision of the planarization layer 12. When the first substrate 11 is a glass substrate, the refractive index of the glass substrate is about 1.52, since the planarization layer 12 directly contacts the first substrate 11 in the embodiment of the present invention, if the refractive indexes of the planarization layer 12 and the first substrate 11 are different, light inside the display panel 100 or external light is reflected at the boundary between the two, and at this time, if the refractive index of the planarization layer 12 is less than 1.3 or greater than 1.8, the refractive index of the planarization layer 12 is greatly different from the refractive index of the first substrate 11, which easily causes a large reflectivity at the interface between the first substrate 11 and the planarization layer 12, and a large number of light reflections are generated, which is not beneficial to improving the display effect of the display panel 100, therefore, by setting the refractive index of the planarization layer 12 to be greater than or equal to 1.3 and less than or equal to 1.8, the refractive index of the planarization layer 12 is made to be close to the refractive index of the first substrate 11, the reflectivity at the interface between the first substrate 11 and the planarization layer 12 can be effectively reduced, reflection of external ambient light can be reduced, and the display definition of the display panel 100 can be improved.
Meanwhile, since the material of the planarization layer 12 in the embodiment of the present invention includes an inorganic material, and the planarization layer 12 may be in direct contact with the first substrate 11, compared to the conventional display panel using the COA technology in which the material of the planarization layer 12 is an organic material, the planarization layer 12 in the embodiment of the present invention may be formed at a high temperature during the film forming process, so as to improve the compactness of the formed planarization layer 12, effectively prevent external moisture from entering the inside of the display panel 100, and improve the reliability of the display panel 100.
In order to further reduce the reflectivity at the interface of the first substrate 11 and the planarization layer 12, the refractive index of the planarization layer 12 is prevented from being too large or too small, resulting in a larger reflectivity at the interface of the first substrate 11 and the planarization layer 12, and in some embodiments, the refractive index of the planarization layer 12 is greater than or equal to 1.4 and less than or equal to 1.6. In practical applications, the refractive index of the planarization layer 12 can be set according to user requirements, for example, the refractive index of the planarization layer 12 is 1.4, 1.5, 1.52, or 1.6. Optionally, when the refractive index of the planarization layer 12 is 1.52 or 1.5, the refractive index of the planarization layer 12 is the same as the refractive index of the first substrate 11, and at this time, light emitted from the inside of the display panel 100 and light from the outside hardly reflect when passing through the planarization layer 12 on the first substrate 11, so that the reflection problem of the display panel 100 can be well improved.
Calculation formula according to reflectivity R = (n) a -n b ) 2 /(n a +n b ) 2 Where R is the reflectivity at the interface of the two film structures, n a Is the refractive index of one of the film structures, n b Is the refractive index of the other film layer structure. As can be seen from the calculation formula of the reflectance, when there is a large difference, particularly a large difference, between the refractive index of the planarization layer 12 and the refractive index of the first substrate 11, there is reflection of light at the interface between the planarization layer 12 and the first substrate 11. For example, when the refractive index of the planarization layer 12 is 1.9 and the refractive index of the first substrate 11 is 1.5, the reflectance at the interface between the planarization layer 12 and the first substrate 11 is 1.4% at this time, and the reflectance at the interface between the two is large, as can be calculated from the calculation formula of the reflectance. To improve the reflection problem, the refractive index of the planarization layer 12 is modified in some embodiments. For example, when the refractive index of the planarization layer 12 away from the first substrate 11 is 1.9, the refractive index of the planarization layer 12 close to the first substrate 11 is 1.7, and the refractive index of the first substrate 11 is 1.5, the reflectance of the planarization layer 12 having a different refractive index at this time is 0.3%, the reflectance between the planarization layer 12 close to the first substrate 11 and the first substrate 11 is 0.3%, and the reflectance between the entire planarization layer 12 and the first substrate 11 is 0.6%, respectively, and thus the reflection problem of the display panel 100 can be effectively improved by improving the refractive index of the planarization layer 12 in a gradient manner.
Therefore, in order to further optimize the reflectivity of the first substrate 10, the refractive index of the planarization layer 12 increases or decreases in a direction away from the first substrate 11. At this time, starting with the refractive index of the first substrate 11, the refractive indices of the first substrate 11 and the planarization layer 12 increase or decrease in a direction away from the first substrate 11. Through the arrangement, the refractive index between the first substrate 11 and the planarization layer 12 is reasonably changed, and the condition of abrupt change of the refractive index is avoided, so that the reflectivity of the display panel 100 is effectively reduced.
Alternatively, in order to achieve that the refractive index of the planarization layer 12 increases or decreases in the direction away from the first substrate 11, the planarization layer 12 may be doped with particles capable of changing the refractive index, for example, the refractive index of the planarization layer 12 may be changed by adjusting the doping concentration of the particles capable of changing the refractive index of the planarization layer 12, or a plurality of planarization sublayers with increasing or decreasing refractive index may be provided to optimize the refractive index of the first substrate 10.
It is to be understood that the refractive index of the planarization layer 12 may increase or decrease in a direction away from the first substrate 11, and the refractive index of the planarization layer 12 may increase linearly, decrease linearly, increase broken line, decrease broken line, increase curved line, and decrease curved line in a direction away from the first substrate 11.
The structure in which the refractive index of the planarization layer 12 increases or decreases in a direction away from the first substrate 11 is similar, and the description is given by taking the example in which the refractive index of the planarization layer 12 decreases in a direction away from the first substrate 11. Referring to fig. 3 to 5, fig. 3 is a graph showing the relationship between the refractive index of the planarization layer and the distance of the planarization layer in the direction away from the first substrate in one embodiment of the present invention, fig. 4 is a graph showing the relationship between the refractive index of the planarization layer and the distance of the planarization layer in the direction away from the first substrate in another embodiment of the present invention, and fig. 5 is a graph showing the relationship between the refractive index of the planarization layer and the distance of the planarization layer in the direction away from the first substrate in yet another embodiment of the present invention. In fig. 3 to 5, an xy coordinate system is established with the distance of the planarization layer 12 in the direction away from the first substrate 11 as the abscissa, the refractive index of the planarization layer 12 as the ordinate, and the refractive index of the first substrate 11 as the origin of coordinates. As can be seen from fig. 3, the refractive index of the planarization layer 12 decreases linearly in a direction away from the first substrate 11, and the refractive index of the film structure in the thickness direction of the planarization layer 12 and the refractive index of the first substrate 11 are in uniform transition, which effectively optimizes the reflectivity of the first substrate 10. As can be seen from fig. 4, the refractive index of the planarization layer 12 decreases in a stepwise manner in a direction away from the first substrate 11, which can reduce the interface reflectivity between the entire planarization layer 12 and the first substrate 11. As can be seen from fig. 5, the planarization layer 12 is curved and decreases in the direction away from the first substrate 11, which also reduces the interface reflectivity between the entire planarization layer 12 and the first substrate 11. By reasonably setting the relationship between the refractive index of the planarization layer 12 and the refractive index of the first substrate 11, the refractive index between the first substrate 11 and the planarization layer 12 is increased or decreased, and there is no abrupt change in the refractive index, and compared with the case where the refractive index of the planarization layer 12 is fixed and there is a difference between the refractive index of the planarization layer 12 and the refractive index of the first substrate 11, the setting method of the embodiment of the invention can effectively reduce the reflectivity of the first substrate 10, thereby improving the display effect of the display panel 100.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention. In order to achieve that the refractive index of the planarization layer 12 increases or decreases in a direction away from the first substrate 11 to optimize the reflectivity of the first substrate 10, in some embodiments, the planarization layer 12 includes a first sublayer 121 and a second sublayer 122, the first sublayer 121 is located on a surface of the first substrate 11 facing the second substrate 20, the second sublayer 122 is located on a surface of the first sublayer 121 facing away from the first substrate 11, and the refractive index of the first sublayer 121 is between the refractive index of the first substrate 11 and the refractive index of the second sublayer 122.
Wherein, when the refractive index of the first substrate 11 is n 3 The refractive index of the first sub-layer 121 is n 4 The refractive index of the second sub-layer 122 is n 5 In a specific embodiment, the refractive index relationship among the first substrate 11, the first sublayer 121, and the second sublayer 122 may be n 3 ≥n 4 ≥n 5 Or n is 3 ≤n 4 ≤n 5 。
In order to better understand that the refractive index of the planarization layer 12 increases or decreases in a direction away from the first substrate 11, so as to reduce the reflectivity at the interface between the first substrate 11 and the planarization layer 12 of the display panel 100, the planarization layer 12 including the first sub-layer 121 and the second sub-layer 122 is described below with reference to a comparative example.
In the comparative example, the refractive index of the first substrate 11, the refractive index of the first sublayer 121 and the refractive index of the second sublayer 122 are abrupt in a direction away from the first substrate 11, i.e. the refraction of the first substrate 11The index of refraction of the first sublayer 121 and the index of refraction of the second sublayer 122 do not increase or decrease in a direction away from the first substrate 11. Wherein, in the comparative example, the refractive index of the first substrate 11 is n 3 =1.5, refractive index of the first sublayer 121 is n 4 =1.9, refractive index of the second sublayer 122 is n 5 If =1.4, the reflectance R at the interface between the first substrate 11 and the first sublayer 121 is calculated by the reflectance calculation formula 1 =1.4%, reflectivity R at the interface of the first sublayer 121 and the second sublayer 122 1 ＝2.3％。
In the embodiment of the invention, the refractive index of the first substrate 11, the refractive index of the first sub-layer 121 and the refractive index of the second sub-layer 122 are increased or decreased in a direction away from the first substrate 11. Wherein when the refractive index of the first substrate 11 is n 3 =1.5, refractive index of the first sublayer 121 is n 4 =1.5, refractive index of the second sublayer 122 is n 5 If =1.4, the reflectance R at the interface between the first substrate 11 and the first sublayer 121 is calculated by the reflectance calculation formula 1 =0%, reflectivity R at the interface of the first sublayer 121 and the second sublayer 122 1 =0.1%. As can be seen from comparison with the comparative example, the setting manner of the refractive indexes of the planarization layer 12 and the first substrate 11 in the embodiment of the present invention can effectively reduce the reflectivity at the interfaces between the first sublayer 121 and the second sublayer 122 and at the interfaces between the first sublayer 121 and the first substrate 11, so as to reduce the reflection of light at each interface, and effectively improve the display effect and the definition of the display panel 100.
When the display panel 100 has a good display effect, the user wants that the display panel 100 can maintain the good display effect for a long time, that is, the display panel 100 needs to have a good reliability, and especially when the display panel 100 is an in-vehicle display panel 100, the reliability of the display panel 100 is required to be higher. In some display panels 100 applying the COA technology, the planarization layer 12 disposed on one side of the first substrate 11 is an Over Coat (OC) layer, and the OC layer is an organic material layer, and when the display panel is exposed to a high temperature or high humidity environment for a long time, the water absorption property of the OC layer is likely to cause foreign matters or bubbles (bubbles) inside the liquid crystal display panel 100.
To solve the above problem, in some embodiments, the material of the planarization layer 12 includes an inorganic material, and the material of the planarization layer 12 includes at least one of silicon nitride (SiNx) and silicon oxide (SiOx), where x is adjustable in a certain range, for example, x may be 2. Through the above arrangement, the planarization layer 12 including the inorganic material can directly contact with the inorganic glass (the first substrate 11), and the embodiment of the invention utilizes the COA technology, so that the planarization layer 12 can be prevented from affecting other film structures, for example, when the color resist layer contacts with other organic film structures, the film temperature cannot be too high, so that the planarization layer 12 can be formed into a film at a high temperature during the film forming process, the compactness of the formed planarization layer 12 is improved, an effect of effectively preventing external water vapor from entering the inside of the display panel 100 is achieved, and the reliability of the display panel 100 is improved.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a display panel according to another embodiment of the invention. In some embodiments, the display panel 100 further includes a frame sealing adhesive 40, the frame sealing adhesive 40 is disposed between the first substrate 10 and the second substrate 20 and around the periphery of the display area AA, and the frame sealing adhesive 40 is disposed on the display panel 100, so that the frame sealing adhesive 40 can block external moisture from entering the display panel 100. However, in some display panels 100, external moisture may enter the inside of the sealant 40 through the surface of the sealant 40 contacting the first substrate 10 and/or the second substrate 20, which may cause foreign matter or bubbles to be generated inside the display panel 100.
In order to solve the above problem, the display panel 100 has a display area AA and a non-display area NA surrounding the display area AA, the planarization layer 12 includes a first groove 123 located in the non-display area NA, the first groove 123 extends from the surface of the planarization layer 12 away from the first substrate 11 to a direction close to the first substrate 11, and the sealant 40 fills the first groove 123. By arranging the first groove 123 on the planarization layer 12 and filling the frame sealing adhesive 40 into the first groove 123, the first groove 123 and the frame sealing adhesive 40 are nested with each other, so that the contact area between the frame sealing adhesive 40 and the planarization layer 12 is increased, the path of external water vapor entering the display panel 100 is prolonged, and the packaging performance of the frame sealing adhesive 40 is improved. Meanwhile, the bonding force between the first substrate 10 and the frame sealing adhesive 40 can be increased, the bonding force of the display panel 100 can be improved, and when the display panel 100 is a curved display panel 100 or the display panel 100 needs to be bent, the arrangement mode can effectively reduce the relative displacement between the first substrate 10 and the second substrate 20, and can prevent the display effect of the display panel 100 from being affected. Further, in the embodiment of the invention, when the material of the planarization layer 12 includes an inorganic material, such as SiNx, it is advantageous to form the first groove 123 on the planarization layer 12 and implement the nesting design of the planarization layer 12 and the sealant 40, and compared with the case where the planarization layer 12 is an OC layer, if the OC layer is a thermal OC layer, the thermal OC layer cannot be formed in the nesting design, and when the OC layer is a light-sensitive OC layer, although the light-sensitive OC layer can be provided with the groove structure and is designed to be nested with the sealant 40, the light-sensitive OC layer can reduce the light penetration of the display panel 100 and deteriorate the flatness of the light-sensitive OC layer. Therefore, the composition material of the planarization layer 12 of the embodiment of the invention includes an inorganic material, which is easy to make the nesting design of the planarization layer 12 and the frame sealing adhesive 40, and has good planarization.
Referring to fig. 8, fig. 8 is a top view of a first substrate according to an embodiment of the invention. In some embodiments, the orthographic projection of the first groove 123 on the first substrate 11 is annular. Here, the annular shape herein refers to a closed structure having an inner edge and an outer edge in a broad sense, and may be any one of a circular ring, a square ring, or a polygonal ring, and the inner edge and the outer edge of the orthographic projection of the first groove 123 on the first substrate 11 may be concentrically disposed to define an annular shape. By arranging the first groove 123 to be annular, the frame sealing glue 40 can be filled into the first groove 123 in the whole circumference of the display panel 100, so that the packaging capacity of the display panel 100 in all directions is uniformly improved, the reliability of the display panel 100 is improved, and meanwhile, the bonding force of the display panel 100 is uniformly improved.
In order to further extend the path of the external moisture entering the display panel 100 and improve the panel bonding force, in some embodiments, the planarization layer 12 includes 1 to 5 first grooves 123 in the direction from the non-display area NA to the display area AA.
When the orthographic projection of the first groove 123 on the first substrate 11 is annular, in the direction pointing from the non-display area NA to the display area AA, the planarization layer 12 includes 1 to 5 annular first grooves 123, that is, the planarization layer 12 includes 1 to 5 annular first grooves 123 over the width of the non-display area NA. The width of the non-display area NA is an extension distance of the left side frame or the right side frame of the display panel 100 shown in fig. 8 along the first direction M, and the width of the non-display area NA may also be an extension distance of the upper side frame or the lower side frame of the display panel 100 shown in fig. 8 along the second direction N. As shown in fig. 8, the planarization layer 12 includes 2 first grooves 123, namely, a first groove 123a and a first groove 123b, and the first grooves 123a and the first grooves 123b are spaced apart from each other. The first grooves 123 with a reasonable number are arranged in the non-display area NA of the display panel 100, so that the space of the non-display area NA of the display panel 100 can be reasonably utilized, and the reliability of the display panel 100 is improved. It is understood that the orthographic projection of the first groove 123 on the first substrate 11 may also be a plurality of structures arranged at intervals.
The structure of the first groove 123 according to the embodiment of the present invention is described below with reference to fig. 8 to 10, fig. 9 is a schematic structural diagram of a display panel according to still another embodiment of the present invention, and fig. 10 is a schematic structural diagram of a display panel according to still another embodiment of the present invention. In some embodiments, the orthographic projection of the first groove 123 on the first substrate 11 is within the outline of the orthographic projection of the planarization layer 12 on the first substrate 11; alternatively, an orthographic projection of at least a portion of the first groove 123 on the first substrate 11 overlaps with an outer contour of an orthographic projection of the planarization layer 12 on the first substrate 11. Through the structure of rationally setting up first recess 123, can be on the basis of the space of the non-display area NA of rational utilization display panel 100 frame promptly, can set up rational structure and a large amount of first recess 123, effectively improve display panel 100's reliance and panel combination power. The outline of the planarized layer 12 orthographically projected onto the first substrate 11 refers to an outline of the planarized layer 12 at the edge-most position in the orthographic projection onto the first substrate 11, that is, the outline is a structure constituting an orthographic projection boundary or outline of the planarized layer 12 onto the first substrate 11. Here, the fact that the orthographic projection of at least part of the first groove 123 on the first substrate 11 overlaps with the outer contour of the orthographic projection of the planarization layer 12 on the first substrate 11 means that the orthographic projection of part of the structure in the thickness direction of the first groove 123 or the whole of the first groove 123 on the first substrate 11 overlaps with the outer contour of the orthographic projection of the planarization layer 12 on the first substrate 11.
With reference to fig. 6, 9 and 10, in some embodiments, the planarization layer 12 may include a first sub-layer 121 and a second sub-layer 122, where the first sub-layer 121 is located on a surface of the first substrate 11 facing the second substrate 20, and the second sub-layer 122 is located on a surface of the first sub-layer 121 facing away from the first substrate 11, and the first groove 123 extends from the surface of the second sub-layer 122 facing away from the first substrate 11 to a direction approaching the first substrate 11 into the second sub-layer 122 and/or the first sub-layer 121. By reasonably setting the extension depth of the first groove 123, the contact area between the frame sealing adhesive 40 and the first substrate 10 can be effectively extended while the process is facilitated.
In specific implementation, as shown in fig. 6, the first groove 123 extends from the surface of the second sublayer 122 facing away from the first substrate 11 to the direction close to the first substrate 11 into the second sublayer 122, or as shown in the first groove 123 on the left side in fig. 9, the first groove 123 penetrates through the second sublayer 122 from the surface of the second sublayer 122 facing away from the first substrate 11 to the direction close to the first substrate 11, or as shown in fig. 10, the first groove 123 penetrates through the second sublayer 122 from the surface of the second sublayer 122 facing away from the first substrate 11 to the direction close to the first substrate 11 and extends into the first sublayer 121. The user can set the depth of the first groove 123 extending into the first sublayer 121 and the second sublayer 122 according to the requirement.
Further, when the first groove 123 extends into the first sub-layer 121, the first groove 123 includes a first sub-groove 1231 and a second sub-groove 1232 that are connected to each other, the first sub-groove 1231 is disposed on the first sub-layer 121, and the second sub-groove 1232 is disposed on the second sub-layer 122. The first groove 123 penetrates through the second sub-layer 122 and extends into the first sub-layer 121, so that the frame sealing adhesive 40 can be respectively filled into the first sub-groove 1231 and the second sub-groove 1232 which are communicated with each other, the contact area between the frame sealing adhesive 40 and the first sub-layer 121 and the second sub-layer 122 is increased, the bonding force between the frame sealing adhesive 40 and the first sub-layer 121 and the second sub-layer 122 is increased, and a good packaging effect is achieved.
The structure of the first groove 123 provided in an embodiment of the present invention is described below with reference to fig. 10. In some embodiments, an orthographic projection of the second sublayer 122 on the first substrate 11 is located within an orthographic projection of the first sublayer 121 on the first substrate 11, where a planar area of the second sublayer 122 is smaller than a planar area of the first sublayer 121, an orthographic projection of the first sub-groove 1231 on the first substrate 11 is located inside an outer contour of an orthographic projection of the first sublayer 121 on the first substrate 11, and an orthographic projection of the second sub-groove 1232 on the first substrate 11 overlaps with an outer contour of an orthographic projection of the second sublayer 122 on the first substrate 11. The first sub-groove 1231 may be formed by patterning the first sub-layer 121 when the first sub-layer 121 is formed, and the second sub-groove 1232 may be formed by patterning the second sub-layer 122 when the second sub-layer 122 is formed, for example, etching the edge of the second sub-layer 122, so that a step-like structure is formed at the edges of the first sub-layer 121 and the second sub-layer 122, or a smaller second sub-layer 122 may be formed, so that the second sub-layer 122 and the edge of the first sub-layer 121 directly form a step-like structure, so as to form the second sub-groove 1232.
Referring to fig. 6 to 10, in some embodiments, the display panel 100 further includes a Spacer (Main Photo Spacer, MPS) 50, the Spacer 50 is disposed between the first substrate 10 and the second substrate 20 for supporting and spacing the first substrate 10 and the second substrate 20, so as to ensure a cell thickness of the liquid crystal display panel 100, in order to further improve a bonding force between the first substrate 10 and the second substrate 20 in the display panel 100, and improve reliability of the display panel 100, in some embodiments, the planarization layer 12 includes a second groove 124, the second groove 124 is dispersed in the display area AA, the second groove 124 extends from a surface of the planarization layer 12 away from the first substrate 11 to a direction close to the first substrate 11, and at least a portion of the Spacer 50 extends into the second groove 124, so as to increase a contact area between the Spacer 50 and the second groove 124, and increase a bonding force of the panel.
In some embodiments, an orthographic projection of the spacer 50 on the first substrate 11 is located within an orthographic projection of the second groove 124 on the first substrate 11, and a dimension of an opening of the second groove 124 in a direction parallel to a plane of the display panel 100 increases in a direction away from the first substrate 11. Through the arrangement, the shape of the spacing column 50 is matched with that of the second groove 124, so that the spacing column 50 is accurately and stably nested into the second groove 124. Meanwhile, when the composition material of the planarization layer 12 includes an inorganic material, such as SiOx, it is advantageous to form the second groove 124 on the planarization layer 12 and implement the nested design of the planarization layer 12 and the spacer pillar 50, compared to when the planarization layer 12 is an OC layer, if the OC layer is a thermal OC layer, the thermal OC layer cannot be formed in the nested design, and when the OC layer is a light-sensitive OC layer, although the groove structure can be formed on the light-sensitive OC layer and the nested design with the sealant 40 is performed, the light-sensitive OC layer can reduce the light penetration of the display panel 100 and deteriorate the flatness of the light-sensitive OC layer.
In combination with the above possible implementation manner, when the planarization layer 12 includes the first sub-layer 121 and the second sub-layer 122 sequentially stacked in a direction close to the second substrate 20, the second groove 124 extends from a surface of the second sub-layer 122 away from the first substrate 11 to a direction close to the first substrate 11 into the second sub-layer 122 and/or the first sub-layer 121. By reasonably setting the extension depth of the second groove 124, the contact area between the spacer 50 and the first substrate 10 is effectively increased while the process is facilitated.
In specific implementation, the second recess 124 extends into the second sublayer 122 from the surface of the second sublayer 122 facing away from the first substrate 11 to the direction close to the first substrate 11, or the second recess 124 extends through the second sublayer 122 from the surface of the second sublayer 122 facing away from the first substrate 11 to the direction close to the first substrate 11 and extends into the first sublayer 121. The user can set the depth of the second groove 124 extending into the first sublayer 121 and the second sublayer 122 according to the requirement.
Further, when the second recess 124 extends into the first sub-layer 121, the second recess 124 includes a third sub-recess 1241 and a fourth sub-recess 1242 that are communicated with each other, the third sub-recess 1241 is disposed in the first sub-layer 121, and the fourth sub-recess 1242 is disposed in the second sub-layer 122. By penetrating the second groove 124 through the second sublayer 122 and extending into the first sublayer 121, the spacer 50 can be filled into the third sub-groove 1241 and the fourth sub-groove 1242 which are communicated with each other, so as to increase the contact area of the spacer 50 with the first sublayer 121 and the second sublayer 122 and increase the bonding force of the spacer 50 with the first sublayer 121 and the second sublayer 122.
Since the display panel 100 in the embodiment of the present invention uses the COA technology, the structure of the display panel 100 in the embodiment of the present invention will be described with reference to fig. 1 to 10. It should be understood that the structures of some of the display panels 100 using the COA technology are exemplarily shown in the drawings, wherein the second substrate 20 may not be limited to the structures shown in the drawings, and may also be disposed in other film layers, and may be a bottom gate structure or a top gate structure, and the positions of the light shielding layer 29, the common electrode 27, the pixel electrode 28, and the touch signal line 25 may also be disposed according to actual needs, which is not limited in the present invention.
In some embodiments, the pixel driving circuit 22 is located on the second substrate 21 and between the color filter units 23, and the pixel driving circuit 22 includes an active layer 221, a gate layer 222, and a source drain layer 223 disposed in a direction away from the second substrate 21, wherein the source drain layer 223 includes a source and a drain. In some embodiments, the second substrate 20 further includes a pixel electrode 28 and a common electrode 27, which are stacked, the common electrode 27 is located on a side of the color filter unit 23 facing away from the second substrate 21, the pixel electrode 28 is located on a side of the common electrode 27 facing away from the second substrate 21, and the pixel electrode 28 is connected to the pixel driving circuit 22 to supply power to the pixel electrode 28 through the pixel driving circuit 22.
In some embodiments, the second substrate 20 further includes a light blocking layer LSM, a buffer layer Buf, a planarization layer 24, a touch signal line 25, a first insulating layer 261, and a second insulating layer 262. The light blocking layer LSM is located on the second substrate 21, the buffer layer Buf is located between the light blocking layer LSM and the driving circuit 22, the touch signal line 25 is located on a side of the flat layer 24 facing away from the second substrate 21, the first insulating layer 261 is located on a side of the touch signal line 25 facing away from the second substrate 21, the color filter unit 23 is located on a side of the first insulating layer 261 facing away from the second substrate 21, the light shielding layer 29 is located on a side of the color filter unit 23 facing away from the second substrate 21, the common electrode 27 is located on a side of the light shielding layer 29 facing away from the second substrate 21, the common electrode 27 can be multiplexed as a touch electrode, the common electrode 27 is electrically connected to the touch signal line 25 through a bridge structure 271, the second insulating layer 262 is located on a side of the common electrode 27 facing away from the second substrate 21, the pixel electrode 28 is located on a side of the second insulating layer 262 facing away from the second substrate 21, and the pixel electrode 28 is electrically connected to the source drain layer 223, wherein the common electrode 27, the pixel electrode 28 and the bridge structure 271 can be formed by using a transparent conductive material such as indium tin oxide. Specifically, when the display panel 100 is in the display mode, the common electrode 27 receives a common electrode signal, the source and drain layers 223 provide a driving signal to the pixel electrode 28, an electric field is formed between the pixel electrode 28 and the common electrode 27, and the liquid crystal is driven to turn over, so that normal display is realized. When the display panel 100 is in the touch mode, the common electrode 27 is reused as a touch electrode, and when a finger touches the display panel 100, the coupling capacitance of the common electrode 27 at the position of the finger changes, and the driving chip determines the touch position of the finger according to the detection signal transmitted by the touch signal line 25.
The light shielding layer 29 includes a first light shielding portion 291 and a second light shielding portion 292, the first light shielding portion 291 extends along a first direction M, the second light shielding portion 292 extends along a second direction N, the first light shielding portion 291 and the second light shielding portion 292 intersect to define an opening area LA of the low temperature polysilicon display panel 100, the color filter unit 23 includes color resistors of a plurality of colors, and two adjacent color resistors of different colors are sequentially spaced in the first direction M to realize full color display of the display panel 100.
It is to be understood that the position of the light shielding layer 29 on the second substrate 20 is not limited to the position shown in the drawings, and optionally, at least a part of the light shielding layer 29 is located between the common electrode 27 and the second insulating layer 262 or at least a part of the light shielding layer 29 is located between the touch signal line 25 and the flat layer 24, which is not limited by the present invention.
In summary, according to the display panel 100 of the embodiment of the invention, the pixel driving circuit 22, the color filter unit 23 and the light shielding layer 29 are located on the same substrate, when the display panel 100 is bent, the relative position relationship of the metal film layer structure light shielding layer 29 in the pixel driving circuit 22 is not affected by the relative displacement between the first substrate 10 and the second substrate 20, and the metal film layer structure, the color filter unit 23 and the light shielding layer 29 on the same substrate are deformed to a similar extent under the same bending force, so that the metal film layer structure is still shielded by the light shielding layer 29 during the bending process, the risk of exposing the light shielding layer 29 in the opening area LA is reduced, and the metal leakage phenomenon is effectively improved. Compared with the prior art that the metal light leakage is improved by increasing the coverage area of the light shielding layer 29, the technical scheme provided by the embodiment of the invention does not need to adjust the coverage area of the light shielding layer 29, so that the display panel 100 still maintains a high aperture ratio and has better display performance.
Further, the first substrate 10 includes a first substrate 11 and a planarization layer 12 located on one side of the first substrate 11, and the formation of the film layer structure such as an alignment layer is facilitated by the provision of the planarization layer 12. When the first substrate 11 is a glass substrate, the refractive index of the glass substrate is about 1.52, and since the planarization layer 12 is in direct contact with the first substrate 11 in the embodiment of the present invention, the refractive index of the planarization layer 12 is greater than or equal to 1.3 and less than or equal to 1.8, so that the refractive index of the planarization layer 12 is close to the refractive index of the first substrate 11, which can effectively reduce the reflectivity at the interface between the first substrate 11 and the planarization layer 12, reduce the reflection of external ambient light, and improve the display definition of the display panel 100.
Meanwhile, the first groove 123 and the second groove 124 are arranged on the first planarization layer 12, and the first groove 123 is located in the non-display area NA, so that the frame sealing adhesive 40 can be filled into the first groove 123, the connection area between the frame sealing adhesive 40 and the planarization layer 12 is increased, the path of external water vapor entering the display panel 100 is prolonged, and good packaging performance is achieved. The second groove 124 is located in the display area AA, so that the spacer 50 can be filled into the second groove 124, and a contact area between the spacer 50 and the planarization layer 12 is increased, so as to increase a bonding force between the first substrate 10 and the second substrate 20, and prevent the first substrate 10 and the second substrate 20 from generating a large offset under a bending force when the display panel 100 is applied in the field of the curved display panel 100, thereby improving the reliability of the display panel 100.
On the other hand, an embodiment of the present invention further provides a display device, including the display panel 100 provided in any of the above embodiments. Specifically, the display device may be a liquid crystal display device, and the specific liquid crystal display device may be an on-vehicle display screen, an electronic display device such as a mobile phone, a computer, or a television, and when the liquid crystal display device is used as the on-vehicle display screen, the liquid crystal display device may be applied to vehicles such as an automobile, a ship, or an airplane, and the liquid crystal display device may be independent of an inherent structure in the automobile, and may also be integrated with other structures in the automobile, such as a front windshield or a table top around an instrument panel, which is not limited in the embodiments of the present invention.
Because the display device provided by the embodiment of the invention comprises the display panel 100 provided at any time, the display device can effectively improve metal light leakage on the premise of keeping high aperture opening ratio, can prevent external water vapor from entering the display device, improves the packaging performance of the display device, simultaneously improves the panel bonding force of the display device, improves the reliability and reliability of the display device, and is convenient to popularize and apply.
In accordance with the above embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (13)
1. A display panel, comprising:
the first substrate comprises a first substrate and a planarization layer positioned on one side of the first substrate, the planarization layer comprises a first sub-layer and a second sub-layer, and the first sub-layer is positioned on the surface, facing the second substrate, of the first substrate; the second sublayer is positioned on the surface of the first sublayer, which faces away from the first substrate, and the refractive index of the first sublayer is between that of the first substrate and that of the second sublayer;
the second substrate is arranged opposite to the first substrate and positioned on one side, away from the first substrate, of the planarization layer, and comprises a second substrate, a pixel driving circuit, a color filtering unit and a light shielding layer, wherein the pixel driving circuit, the color filtering unit and the light shielding layer are positioned on one side, facing the first substrate, of the second substrate;
a display medium layer sandwiched between the first substrate and the second substrate,
wherein the material of the planarization layer comprises an inorganic material, and the refractive index of the planarization layer is greater than or equal to 1.3 and less than or equal to 1.8;
the display panel is provided with a display area and a non-display area surrounding the display area, the planarization layer comprises a first groove positioned in the non-display area, the first groove extends from the surface of the planarization layer, which faces away from the first substrate, to the direction close to the first substrate,
the display panel further comprises frame sealing glue, the frame sealing glue is located between the first substrate and the second substrate and arranged around the periphery of the display area, and the frame sealing glue fills the first groove.
2. The display panel according to claim 1, wherein a refractive index of the planarization layer is 1.4 or more and 1.6 or less.
3. The display panel of claim 1, wherein the refractive index of the planarization layer increases or decreases in a direction away from the first substrate.
4. The display panel according to claim 1, wherein a material of the planarization layer comprises at least one of silicon nitride and silicon oxide.
5. The display panel according to claim 1, wherein an orthographic projection of the first groove on the first substrate is annular.
6. The display panel according to claim 1, wherein the number of the first grooves included in the planarization layer is 1 to 5 in a direction from the non-display area to the display area.
7. The display panel according to claim 1, wherein an orthographic projection of the first groove on the first substrate is located within an outer contour of an orthographic projection of the planarization layer on the first substrate;
or the orthographic projection of at least part of the first groove on the first substrate is overlapped with the outline of the orthographic projection of the planarization layer on the first substrate.
8. The display panel according to claim 1, wherein the first groove extends from the surface of the second sub-layer facing away from the first substrate towards the first substrate into the second sub-layer and/or into the first sub-layer.
9. The display panel according to claim 8, wherein the first groove comprises a first sub-groove and a second sub-groove which are communicated with each other, the first sub-groove is disposed on the first sub-layer, and the second sub-groove is disposed on the second sub-layer.
10. The display panel according to claim 9, characterized in that an orthographic projection of the second sublayer on the first substrate is located within an orthographic projection of the first sublayer on the first substrate,
the orthographic projection of the first sub-groove on the first substrate is positioned inside the outline of the orthographic projection of the first sub-layer on the first substrate, and the orthographic projection of the second sub-groove on the first substrate is overlapped with the outline of the orthographic projection of the second sub-layer on the first substrate.
11. The display panel according to any one of claims 1 to 10, wherein the planarization layer comprises:
a second groove in the display region, the second groove extending from the surface of the planarization layer facing away from the first substrate toward the first substrate,
the display panel further includes:
and the spacing column is arranged between the first substrate and the second substrate and used for supporting the first substrate and the second substrate, and at least part of the spacing column extends into the second groove.
12. The display panel of claim 11, wherein an orthographic projection of the spacer pillar on the first substrate is located within an orthographic projection of the second groove on the first substrate;
the size of the opening of the second groove in the direction parallel to the plane of the display panel increases along the direction away from the first substrate.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
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| JP2014074797A (en) * | 2012-10-04 | 2014-04-24 | Japan Display Inc | Liquid crystal display device and method for setting retardation of the same |
| CN104317111A (en) * | 2014-10-14 | 2015-01-28 | 深圳市华星光电技术有限公司 | Liquid crystal display panel |
| CN106094361A (en) * | 2016-08-22 | 2016-11-09 | 深圳市华星光电技术有限公司 | Display panels |
| CN109696759A (en) * | 2018-12-29 | 2019-04-30 | 武汉华星光电技术有限公司 | High-penetration liquid crystal display panel preparation method and its display panel |
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| KR101921163B1 (en) * | 2011-07-30 | 2018-11-23 | 엘지디스플레이 주식회사 | In-Plane switching mode liquid crystal display device and method of fabricating the same |
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| JP2014074797A (en) * | 2012-10-04 | 2014-04-24 | Japan Display Inc | Liquid crystal display device and method for setting retardation of the same |
| CN104317111A (en) * | 2014-10-14 | 2015-01-28 | 深圳市华星光电技术有限公司 | Liquid crystal display panel |
| CN106094361A (en) * | 2016-08-22 | 2016-11-09 | 深圳市华星光电技术有限公司 | Display panels |
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