CN107632440B - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN107632440B CN107632440B CN201710930641.0A CN201710930641A CN107632440B CN 107632440 B CN107632440 B CN 107632440B CN 201710930641 A CN201710930641 A CN 201710930641A CN 107632440 B CN107632440 B CN 107632440B
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Abstract
The invention discloses a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises the following components: a first substrate; the display film layer group is arranged on one side of the first substrate and comprises a carrier layer, a packaging layer and a display material positioned between the carrier layer and the packaging layer; the carrier layer is arranged close to the first substrate relative to the packaging layer, the surface of the carrier layer, which is far away from the first substrate, is provided with a plurality of micro-grid groove structures, and the display material is arranged in the micro-grid groove structures; the pixel of the display panel comprises a plurality of sub-pixels, and each sub-pixel comprises a plurality of micro-grid groove structures. Through setting up display material in same layer, reduced display panel thickness, through setting up little lattice groove structure, prevented that the display material of different colours from mixing mutually, do not to operating to the group in the preparation process moreover, reduced the requirement to display panel preparation technology to display panel's yields has been improved.
Description
Technical Field
The invention relates to the technical field of semiconductors, in particular to a display panel, a manufacturing method thereof and a display device.
Background
Cholesteric liquid crystals, which are widely used in the display field, have three different molecular states, a planar state, a focal conic state, and a homeotropic state. The cholesteric liquid crystal has a layered structure, the long axis of the liquid crystal molecules in each layer is parallel to the plane of the layer, the layers are overlapped in a spiral shape, the direction vertical to the plane of each layer is the spiral axis of the cholesteric liquid crystal, when no external electric field is added and the cholesteric liquid crystal is in a plane state, if the light irradiates the cholesteric liquid crystal molecules, the light meeting the Bragg reflection condition is reflected, and the light is in a bright state; when a certain electric field is applied to the cholesteric liquid crystal in the plane state, the cholesteric liquid crystal is turned into a focal conic state from the plane state, the directions of the spiral shafts are randomly arranged, and light rays are irradiated on cholesteric liquid crystal molecules and then scattered at the junction of liquid crystal domains to be in a dark state; when the applied external electric field reaches a certain intensity, the cholesteric liquid crystal is converted from a focal conic state to a vertical state, the cholesteric liquid crystal is in a transparent state, for the cholesteric liquid crystal in the vertical state, after the external electric field is rapidly removed, the cholesteric liquid crystal is converted from the vertical state to a plane state, and when the external electric field is slowly removed, the cholesteric liquid crystal in the plane state or the focal conic state can stably exist under the condition of no external electric field, belongs to a stable state, namely the plane state and the focal conic state can be used as two contrast states to display different light and shade effects, so the cholesteric liquid crystal can be used as a display material of a display device.
The cholesteric liquid crystal display device prepared by using the bistable property of the cholesteric liquid crystal is a typical reflective display device, can be provided with no backlight module, has the advantages of low power consumption, high brightness, high response speed and the like, and is considered to be one of the most promising display devices in the field of electronic paper.
Fig. 1 is a schematic structural diagram of a display film layer group of a cholesteric liquid crystal panel in the prior art, as shown in fig. 1, when a cholesteric liquid crystal display device performs color display, the display film group includes a plurality of substrate layers 11, the substrate layers 11 are overlapped with each other, cholesteric liquid crystals of a single color are disposed between the substrate layers 11, including red liquid crystals 12, blue liquid crystals 13 and green liquid crystals 14, the arrangement order of the three liquid crystals can be changed, in order to control the display effect, at least 4 substrate layers need to be disposed, the process is complicated, the requirement on the alignment precision between the substrate layers 11 is high, and six groups of electrodes need to be driven simultaneously during operation, the power consumption is large, the electric fields between the electrodes are easy to influence each other, in addition, because the display film group is too thick, on one hand, flexibility is not easy to achieve, on the other hand, when oblique viewing is performed, as shown in fig. 1, light L1 passes through, there is a serious color mixing problem, and when the alignment precision of the substrate layer 11 is not sufficient, the color mixing problem is more serious, and the display effect and the display quality are reduced.
Therefore, it is an urgent need to solve the problems in the art to provide a display panel, a method for manufacturing the same, and a display device, which can reduce the thickness of a display film layer group, reduce the requirement for the alignment precision of a substrate layer, and improve the display effect.
Disclosure of Invention
In view of this, the invention provides a display panel, a manufacturing method thereof and a display device, which solve the technical problems of large thickness of a display film layer group and high requirement on alignment precision of a substrate layer.
In order to solve the above technical problem, the present invention provides a display panel, including:
a first substrate;
the display film layer group is arranged on one side of the first substrate and comprises a carrier layer, a packaging layer and a display material positioned between the carrier layer and the packaging layer;
the carrier layer is arranged close to the first substrate relative to the packaging layer, a plurality of micro-grid groove structures are arranged on the surface, far away from the first substrate, of the carrier layer, and the display material is arranged in the micro-grid groove structures;
the pixels of the display panel comprise a plurality of sub-pixels, and the sub-pixels comprise a plurality of the micro-grid groove structures.
The invention also provides a display device comprising any one of the display panels provided by the invention.
The invention also provides a manufacturing method of the display panel, which comprises the following steps:
manufacturing a first substrate;
forming a carrier layer on the first substrate by using a coating process;
processing the carrier layer by adopting an exposure and development process so as to form a plurality of micro-grid groove structures on the surface of the carrier layer away from the first substrate, wherein the pixels of the display panel comprise a plurality of sub-pixels, and the sub-pixels comprise a plurality of micro-grid groove structures;
injecting a display material into the micro-grid groove structure;
and packaging the micro-grid groove structure to form a packaging layer.
Compared with the prior art, the display panel, the manufacturing method thereof and the display device have the advantages that:
the invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel and the display device comprise a first substrate, a carrier layer, a packaging layer and a display material, the carrier layer is provided with a micro-grid groove structure, by arranging the display material in the same layer, the thickness of the display panel and the display device is effectively reduced, by providing the micro-cell structure and disposing the display material in the micro-cell structure, mixing of the display materials of different colors is prevented, and each sub-pixel includes a plurality of micro-cell structures, for one sub-pixel, even if part of the micro-groove structure of the sub-pixel is damaged, since the normal micro-groove structure still exists in the sub-pixel, therefore, the influence on the display effect cannot be too large, the group assembling operation is not carried out in the preparation process, the requirement on the preparation process of the display panel is reduced, and the yield of the display panel is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a display film layer set of a cholesteric liquid crystal panel in the prior art;
FIG. 2 is a diagram of a film structure of a cholesteric liquid crystal display panel in the related art;
FIG. 3 is a diagram of a structure of a display panel;
FIG. 4 is a diagram of another exemplary embodiment of a display panel;
FIG. 5 is a top view of a display panel according to the present invention;
FIG. 6 is a diagram of another exemplary embodiment of a display panel;
FIG. 7 is a diagram of another exemplary embodiment of a display panel;
FIG. 8 is a diagram of another exemplary embodiment of a display panel;
FIG. 9 is an enlarged view of area A of FIG. 8;
FIG. 10 is a diagram of another exemplary embodiment of a display panel;
FIG. 11 is a diagram of another exemplary embodiment of a display panel;
FIG. 12 is a diagram of a structure of a display device;
FIG. 13 is a flowchart illustrating a method of fabricating a display panel according to the present invention;
fig. 14 is a diagram illustrating a structure of a semi-finished film layer completed in S101 in the display panel manufacturing method according to the present invention;
FIG. 15 is a diagram illustrating a structure of a semi-finished film layer completed in S101-S102 in a method for fabricating a display panel according to the present invention;
FIG. 16 is a diagram illustrating a structure of a semi-finished film layer completed in S101-S103 in a method for fabricating a display panel according to the present invention;
FIG. 17 is a perspective view of a semi-finished product completed in S101-S103 in a method for fabricating a display panel according to the present invention;
FIG. 18 is a diagram illustrating a structure of a semi-finished film layer completed in S101-S104 in a method for fabricating a display panel according to the present invention;
FIG. 19 is a diagram illustrating a film structure of a display panel manufactured by a method of manufacturing a display panel according to the present invention;
FIG. 20 is a diagram illustrating a film structure of a display panel manufactured by another method for manufacturing a display panel according to the present invention;
FIG. 21 is a diagram illustrating a film structure of a display panel fabricated by another method of fabricating a display panel according to the present invention;
FIG. 22 is an enlarged view of area A of FIG. 21;
FIG. 23 is a graph illustrating the effect of reducing the size of the micro-grid groove structure of FIG. 22;
FIG. 24 is a graph showing the effect of increasing the amount of injection of the display material into the micro-grid groove structure shown in FIG. 22.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
A common liquid crystal display module mainly includes a backlight module, an array substrate, a pixel electrode layer, a display film layer group containing liquid crystal molecules, and a color film substrate layer, where the backlight module provides a light source, and the array substrate controls the pixel electrode of the pixel electrode layer to adjust the deflection of the liquid crystal in the display film layer group, and controls the intensity of the emergent light by controlling the deflection direction of the liquid crystal, and the emergent light passes through the color film substrate to obtain different colors, usually three primary colors of red, green and blue, and the light with the three primary colors is mixed to display a predetermined pattern, and when cholesteric liquid crystal is used as the liquid crystal in the display film layer group, because the cholesteric liquid crystal is a chiral molecule with a helical structure, the display film group has bistable state under the condition of not applying an external electric: one is a planar state having bragg reflection characteristics, and the other is a focal conic state. By utilizing the special bistable characteristic, the reflective cholesteric liquid crystal display panel can be prepared without using a backlight module.
Fig. 2 is a film structure diagram of a cholesteric liquid crystal display panel in the related art, and as shown in fig. 2, the cholesteric liquid crystal display panel includes two substrates 231, and liquid crystal cells located between the two substrates 231 and filled with cholesteric liquid crystal molecules of different colors, and each liquid crystal cell is sequentially filled with a red liquid crystal 232, a green liquid crystal 233, and a blue liquid crystal 234, which can reflect light with a certain wavelength, so that a backlight module is not needed, and in operation, a driving circuit controls a thin film transistor on the substrate 231, and the thin film transistor serves as a switching device of a pixel unit, and includes: the grid electrode is connected with the active layer, the surface of the active layer is changed from a depletion layer into an electron accumulation layer along with the increase of grid voltage after voltage is applied to the grid electrode, an inversion layer is formed, and when strong inversion is achieved, namely starting voltage is achieved, current carriers of the active layer move to achieve conduction between the source electrode and the drain electrode. The array substrate is also provided with a gate line and a data line, the gate line is connected with the gate electrode and used for transmitting a gate scanning driving signal, the data line is connected with the source electrode and used for transmitting a driving voltage signal, the drain electrode is connected with a pixel electrode on a pixel electrode layer, an electric field for deflecting liquid crystal molecules is formed between the pixel electrode and a common electrode, by applying an electric field to the cholesteric liquid crystal molecules, the cholesteric liquid crystal molecules are switched between a flat stable state and a focal conic state, when external light irradiates the cholesteric liquid crystal molecules, the liquid crystal molecules in the flat stable state can reflect the light meeting the Bragg reflection condition, the liquid crystal molecules in the focal conic state can not reflect the light, thereby realizing a reflective display, as shown in fig. 2, three cholesteric liquid crystals of different colors are disposed in the same layer, the thickness of the display film layer group can be reduced, and the problem of color mixing when oblique viewing is performed is improved to some extent.
However, the inventor has found that when the cholesteric liquid crystal display panel shown in fig. 2 is manufactured, two methods are generally adopted, one method is to first prepare two substrates 231 and each liquid crystal groove, close one end of each liquid crystal groove, pour liquid crystals in sequence from the other end with an opening, and then close the liquid crystal grooves, and this method is long in time consumption, low in efficiency, difficult to ensure the tightness between the liquid crystal grooves, and easy to cause the mixing of liquid crystals of different colors, thereby affecting the display effect; another method is to prepare a substrate 231 and a liquid crystal cell on the substrate 231, fill liquid crystal in the liquid crystal cell, and then seal the liquid crystal cell with another substrate 231, when the two substrates 231 are combined, liquid crystals of different colors are easily overflowed, which causes a color mixing problem and affects the display effect. When the display panel manufactured by the two methods is heated to cause thermal expansion, the base plate is easy to expand and bend, the tightness of the liquid crystal groove is damaged, liquid crystal molecules in different liquid crystal grooves are mixed, and the display effect is reduced.
Based on the above, the invention adopts the substrate with the micro-grid groove structure, arranges the liquid crystal molecules as the display material in the micro-grid groove structure of the substrate, and simultaneously packages the liquid crystal, so that the liquid crystal in the micro-grid groove structure is difficult to mix with the liquid crystal in other micro-grid groove structures, thereby improving the shock resistance, bending resistance and reliability of the display panel, and the projection area of each micro-grid groove on the display panel is extremely small, even if a few micro-grid groove structures are damaged, the liquid crystal in the adjacent micro-grid groove is mixed, the display effect is not greatly influenced, and in the preparation process, the pairing is not needed, thereby reducing the requirement on the preparation process, and ensuring the yield of the display panel.
The present invention provides a display panel, and fig. 3 is a film structure diagram of the display panel according to the present invention, and as shown in fig. 3, the display panel includes: a first substrate 31 and a display film layer group 32.
The first substrate 31, configured to support the display film layer group 32, may be made of a metal material, or may be made of a non-metal material, or may be a conductive material, or may be a non-conductive material, or may be a material with a relatively strong rigidity, or may be a flexible material, which may be selected according to a specific preparation requirement, and a specific material of the first substrate 31 is not limited in the present invention.
The display film layer group 32 is disposed on one side of the first substrate 31, and includes a carrier layer 321, a packaging layer 322, and a display material 323 located between the carrier layer 321 and the packaging layer 322, where the carrier layer 321 may be a metal material or a non-metal material, or a flexible material or a rigid material, and the packaging layer 322 may be a transparent material, or a semi-reflective and semi-transparent material.
The carrier layer 321 is disposed close to the first substrate 31 relative to the encapsulation layer 322, the surface of the carrier layer 321 away from the first substrate 31 is disposed with a plurality of micro-cell structures, the display material 323 is disposed in the micro-cell structures, the specific shape and configuration of the carrier layer 321 are not limited, the shape and arrangement of the grooves in the micro-cell structures are not limited, the grooves may be circular grooves, triangular grooves, square grooves, or the like, or may be grooves with custom shapes, the shape of the grooves for disposing the display material 323 in the micro-cell structures may be a uniform shape or may be various shapes, fig. 3 illustrates as an example only, the projection area of the grooves of the micro-cell structures on the first substrate 31 may be in the nanometer, micrometer, millimeter, or centimeter scale, the present invention does not limit the size scale, in some optional embodiments, continuing to refer to fig. 3, in carrier layer 321, one micro-cell gap 324 is provided every 3 micro-cell structure grooves, or one micro-cell gap 324 may be provided every one or more micro-cell structure grooves, or no micro-cell gap may be provided, and in fig. 3, the micro-cell gap includes two groove sidewalls, and in some alternative embodiments, one or more sidewalls may be additionally provided between the two groove sidewalls to prevent display material 323 in different grooves from mixing together due to defects in the groove sidewalls.
With continued reference to fig. 3, display material, which in some alternative embodiments is cholesteric liquid crystal material, but may be other types of liquid crystal material, is disposed in the grooves of the three microgroove structures between two adjacent microgroove voids 324.
In some alternative embodiments, the encapsulation material of the encapsulation layer 322 is disposed in the micro-grid groove structure, and at this time, the encapsulation layer 322 may be prepared by an integral injection molding method, as shown in fig. 3, the encapsulation material is connected into a whole to cover the grooves of all the micro-grid groove structures on the carrier layer 321, in some alternative embodiments, fig. 4 is a film structure diagram of another display panel of the present invention, as shown in fig. 4, the encapsulation material of the encapsulation layer 322 seals the display material 323 in each micro-grid groove structure, but does not form a whole, and in some alternative embodiments, the encapsulation layer 322 may include both the encapsulation material in a plurality of grooves connected together and the encapsulation material in a separate existence without being connected to the encapsulation material in other grooves.
Fig. 5 is a top view of a display panel according to the present invention, as shown in fig. 5, a pixel of the display panel according to the present invention includes a plurality of sub-pixels 33, each sub-pixel 33 includes a plurality of micro-groove structures, the number of the micro-groove structures in any sub-pixel is plural, the number of the micro-groove structures in any sub-pixel may be equal to or different from the number of the micro-groove structures in another sub-pixel, the display material in the micro-groove structures in any sub-pixel may be the same type of liquid crystal or different types of liquid crystal, in some alternative embodiments, the display material in each sub-pixel 33 is a cholesteric liquid crystal of the same color, and at this time, the display material is enclosed in the micro-groove structures and isolated from each other, the liquid crystal in the groove of any micro-groove structure does not mix with the liquid crystal in the grooves of other micro-groove structures, the problem of mixing colors of liquid crystals is avoided, even a small number of micro-grid groove structures are damaged, because one sub-pixel 33 comprises a plurality of micro-grid groove structures, the color displayed by the sub-pixel 33 is less influenced, in addition, the projection area of the groove of the micro-grid groove structures on the first substrate 31 can be set to be extremely small, namely, only a small number of liquid crystals are packaged in any groove, at the moment, at the position where one sub-pixel is in contact with the other sub-pixel, even if the groove of the small number of micro-grid groove structures is damaged, the liquid crystals with different colors are mixed, and the mixed liquid crystal amount is extremely small, so that the display effect of the display panel cannot be greatly influenced.
Further, in some alternative embodiments, with continued reference to fig. 5, the display panel provided by the present invention further includes a scan line 41, a data line 42, and a thin film transistor 43. The thin film transistor 43 includes a source electrode, a drain electrode, an active layer and a gate electrode, the scan line 41 is connected with the gate electrode, the data line 42 is connected with the source electrode, the thin film transistor 43 is used as a switching device of each sub-pixel, when a voltage is applied to the gate electrode, the surface of the active layer is changed from a depletion layer to an electron accumulation layer along with the increase of the gate voltage, an inversion layer is formed, and when a strong inversion is reached, that is, when a turn-on voltage is reached, carriers of the active layer move to realize conduction between the source electrode and the drain electrode. The data line 42 is connected with the source electrode for transmitting a driving voltage signal, the drain electrode is connected with the pixel electrode, so that the driving voltage signal is applied to the pixel electrode, an electric field for controlling a display material is formed between the pixel electrode and the common electrode, when the display material is cholesteric liquid crystal, the cholesteric liquid crystal molecules are switched between a plane state and a focal conic state by controlling the intensity of an external electric field, so that the cholesteric liquid crystal molecules are controlled, light irradiated to the cholesteric liquid crystal molecules from the side, far away from the first substrate 31, of the encapsulation layer 32 is reflected or not reflected, and brightness adjustment is achieved. In this embodiment, the scan lines, the data lines, the thin film transistors, the pixel electrodes, and the like may be disposed between the first substrate and the carrier layer.
Further, in some optional embodiments, fig. 6 is a film layer structure diagram of another display panel in the present invention, fig. 7 is a film layer structure diagram of another display panel in the present invention, as shown in fig. 6 and fig. 7, the display panel provided by the present invention further includes a flat layer 35 disposed on a side of the encapsulation layer 32 away from the carrier layer 321, where the flat layer 35 may be a fully transparent material, a semitransparent material, or a semi-reflective and semi-transparent material, in some optional embodiments, a layer of the flat layer 35 away from the first substrate 31 is a smooth plane without concave-convex undulations, by adding the flat layer 35, smoothness of the surface of the display panel is ensured, the display panel provided by the present invention may be a cholesteric liquid crystal reflective display panel, display is realized by reflecting incident light, the incident light is irradiated onto cholesteric liquid crystal as the display material 323 from a side of the flat layer 35 away from the first substrate 31, the light that satisfies bragg reflection condition is reflected by cholesteric liquid crystal, thereby realize the display function, because the surperficial no unsmooth undulation of one side that first base plate 31 was kept away from to planarization layer 35, so parallel light is from this surface injection planarization layer 35 back, each light still can keep parallelly, thereby prevent because the light path of light changes the influence to display effect, planarization layer 35 can play the effect of protection display film layer group 32 simultaneously, prevent to use display panel for a long time after, packaging material peels off from display panel, lead to display material to drop, influence display effect and user experience.
Further, in some alternative embodiments, fig. 8 is a film structure diagram of another display panel in the present invention, as shown in fig. 8, a contact surface 324 between the display material 323 and the encapsulation layer 322 is a curved surface protruding away from the first substrate 31, and further, in some alternative embodiments, fig. 9 is an enlarged view of a region a in fig. 8, as shown in fig. 9, when a bottom surface of the micro-groove structure in the carrier layer 321 is a plane parallel to the first substrate 31, a contact angle a between the display material 323 and the bottom surface of the micro-groove structure in the carrier layer 321 is equal to a contact angle between the display material 323 and the first substrate 31, and a contact angle between the display material 323 and the first substrate 31 ranges from 50 degrees to 90 degrees. At a contact point P1 where the display material 323, the encapsulation layer 322 and the carrier layer 321 contact each other, a tangent L2 tangent to the display material 323 is made, and a contact angle a is equal to an included angle between L2 and the bottom surface of the micro-grid groove structure in the carrier layer 321. When the size of the contact angle a is 50 degrees to 90 degrees, the shape of the display material 323 is approximately semicircular, and when the contact angle is 90 degrees, the shape of the display material is semicircular, that is, the distance d2 between any point on the edge of the display material 323, for example, the point P3 in fig. 9, and the center P2 point of the semicircle is a constant value and is equal to the radius d2 of the semicircle, at this time, when the display panel provided by the invention is viewed at different angles, almost the same effective thickness and the arrangement condition of the surface liquid crystal as the display material can be obtained, the panel can obtain a good viewing angle, and the display quality of the display panel at a large viewing angle is improved. In the related art, the surface of the liquid crystal as the display material contacting the substrate is a plane, and has different effective thicknesses when viewed at different angles, so that the effective retardation amounts are different, and the observed picture shows a difference with different angles, thereby reducing the display effect.
Further, in some alternative embodiments, the display film layer set 32 further includes: surfactant material, mixed with the display material 323, with continued reference to fig. 9, the magnitude of the contact angle a is related to the surface energy of the display material 323 and the surface energy of the carrier layer 321, and when different display materials are used, the value of the contact angle a is different, and in order to make the magnitude of the contact angle a be 50 degrees to 90 degrees, it is usually necessary to add the surfactant material to adjust the magnitude of the contact angle a, in the present invention, the display material 323 may be cholesteric liquid crystal, and the added surfactant may be an organic surfactant, for example: one or more of linear alkyl benzene sulfonic acid sodium, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, lauryl alcohol sodium sulfate, lauroyl glutamic acid, nonylphenol polyoxyethylene ether, peregal, diethanol amide, stearic acid monoglyceride, lignosulfonate, heavy alkylbenzene sulfonate, alkyl sulfonate and fatty alcohol-polyoxyethylene ether.
Further, in some alternative embodiments, as shown in fig. 8, the bottom 325 of the micro-grid groove structure is a plane, and the manufacturing method for forming the plane bottom is simple for a display panel with a single-side observation, and fig. 10 is a film structure diagram of another display panel according to the present invention, and in some alternative embodiments, as shown in fig. 10, the bottom 325 of the micro-grid groove structure is a curved surface protruding toward the first substrate 321, and for a display panel with a double-side observation, no matter the display panel is observed on a side close to the first substrate 321, or observed on a side far from the first substrate 321, a better display effect can be obtained.
Further, in some optional embodiments, fig. 11 is a film structure diagram of another display panel in the present invention, as shown in fig. 11, the display panel provided in the present invention further includes a second substrate 34 disposed opposite to the first substrate, the display film layer group 32 is located between the first substrate 31 and the second substrate 32, the first substrate 31 is an array substrate, or the second substrate 34 is an array substrate, in the present invention, the display material may be a liquid crystal material, further, may be a cholesteric liquid crystal material, and the display panel controls the display material through the array substrate. The thin film transistor comprises a source electrode, a drain electrode, an active layer and a grid electrode, wherein a scanning line is connected with the grid electrode, a data line is connected with the source electrode, the thin film transistor is used as a switching device of each sub-pixel, the display material is controlled by applying an electric field to the display material, and the applied electric field can be a horizontal electric field or a vertical electric field.
Further, in some optional embodiments, the pixels of the display panel are divided into a red pixel, a blue pixel and a green pixel, the display material is a cholesteric liquid crystal material, wherein the cholesteric liquid crystal material in the red pixel reflects red light, the cholesteric liquid crystal material in the blue pixel reflects blue light, and the cholesteric liquid crystal material in the green pixel reflects green light, by using the cholesteric liquid crystal material, the display panel provided by the invention can realize reflective display, so that a backlight module is not needed, the state of the cholesteric liquid crystal material is controlled by using the array substrate to be switched between a planar state and a focal conic state, when the cholesteric liquid crystal material is in the planar state, the cholesteric liquid crystal molecules in the red pixel can reflect red light, the cholesteric liquid crystal material in the blue pixel can reflect blue light, and the cholesteric liquid crystal material in the green pixel can reflect green light, the display panel provided by the invention has low power consumption and long service life, and when the cholesteric liquid crystal material is in a planar state and a focal conic state, the original state can be kept without applying an external electric field, namely, the cholesteric liquid crystal material can be in a stable state for a long time under the condition of a zero electric field, and only when a displayed image needs to be changed, the electric field is applied to the cholesteric liquid crystal material through the array substrate to change the state of the cholesteric liquid crystal material, namely, the power consumption of the display panel is further reduced.
Of course, the present application is not limited to the above-mentioned three-color scheme, but may also be a four-color scheme of red, green, blue, and white, or a four-color scheme of cyan, magenta, yellow, and black, or other schemes.
Fig. 12 is a film structure diagram of a display device according to the present invention, and as shown in fig. 12, the display panel according to the present invention includes any one of the display panels 41 according to the present invention, and in some alternative embodiments, further includes a protective layer 42 for protecting the display panel 41. The display panel provided by the invention has the functions and effects of any display panel provided by the invention, and the description is omitted.
The present invention further provides a method for manufacturing a display panel, and fig. 13 is a flowchart of the method for manufacturing a display panel according to the present invention, as shown in fig. 13, the method includes:
s101: and manufacturing a first substrate.
Fig. 14 is a diagram of a structure of a semi-finished film layer completed in S101 in a manufacturing method of a display panel according to the present invention, and as shown in fig. 14, the first substrate 31 may have any shape, which is not limited in the present invention, and the first substrate 31 may be made of a metal or a non-metal material, and may be a transparent material, or may be an opaque material or a semi-reflective and semi-transparent material.
S102: a carrier layer is formed on a first substrate using a coating process.
Fig. 15 is a diagram illustrating a structure of a semi-finished film layer completed in S101-S102 in a manufacturing method of a display panel according to the present invention, as shown in fig. 15, a carrier layer 321 covers a first substrate layer 31.
In other embodiments of the present invention, before the carrier layer is formed, scan lines, data lines, thin film transistors, pixel electrodes, and the like may be formed on the first substrate.
S103: and processing the carrier layer by adopting an exposure and development process so as to form a plurality of micro-grid groove structures on the surface of the carrier layer away from the first substrate, wherein the pixels of the display panel comprise a plurality of sub-pixels 33, and the sub-pixels 33 comprise a plurality of micro-grid groove structures.
Fig. 16 is a diagram illustrating a structure of a semi-finished film layer completed by S101-S103 in a manufacturing method of a display panel according to the present invention, and fig. 17 is a perspective view illustrating a semi-finished film layer completed by S101-S103 in a manufacturing method of a display panel according to the present invention, as shown in fig. 16 and fig. 17, after exposure and development, a micro-cell structure 326 is formed on an encapsulation layer 321, the micro-cell structure is used for encapsulating a display material, in some alternative embodiments, the display material is a cholesteric liquid crystal material, grooves in the micro-cell structure 326 are separated from each other, grooves of a plurality of micro-cell structures form a sub-pixel 33, and a gap may be formed between different sub-pixels 33.
S104: and injecting a display material into the micro-grid groove structure.
Fig. 18 is a diagram of a structure of a semi-finished film layer completed in S101-S104 in a manufacturing method of a display panel according to the present invention, as shown in fig. 18, the display material 323 is disposed in the micro-cell structure 326, and more specifically, disposed in each of the mutually adjacent grooves in the micro-cell structure 326, so that the display material 323 in each of the grooves is not mixed with each other, and the projection area of the groove of any one of the micro-cell structures on the first substrate 31 is small, the volume of the display material in the groove is small, and even if a few side walls of the groove are damaged, the display effect is not greatly affected.
S105: and packaging the micro-grid groove structure to form a packaging layer.
Fig. 19 is a film structure diagram of a display panel manufactured by a display panel manufacturing method according to the present invention, as shown in fig. 19, a packaging layer 322 seals a display material 323 in a groove of a micro-cell structure, so as to prevent the display material 323 from shaking during the use of the display panel to affect the display effect, the packaging layer 323 may be an integral body formed by packaging materials in the respective grooves, in some optional embodiments, fig. 20 is a film structure diagram of a display panel manufactured by another display panel manufacturing method according to the present invention, as shown in fig. 20, a packaging material is disposed in the groove of each micro-cell structure, the packaging materials are not connected to each other, and the packaging layer 322 is formed by each dispersed packaging material.
Further, in some alternative embodiments, the step of injecting the display material into the micro-cell structure comprises: injecting a display material into the micro-grid groove structure by using an ink-jet printing technology or a printing technology, and packaging the micro-grid groove structure, wherein the step of packaging the micro-grid groove structure comprises the following steps: and injecting the packaging material into the micro-grid groove structure by using an ink-jet printing technology or a printing technology. Through using inkjet printing technique or printing technique, can be fast, accurate with display material and packaging material setting in the structure of little check groove, efficiency is higher and be difficult for makeing mistakes.
Further, in some optional embodiments, after forming the encapsulation layer, the method further includes: and coating a flat layer on the surface of the packaging layer. Fig. 21 is a film layer structure diagram of a display panel manufactured by another display panel manufacturing method according to the present invention, as shown in fig. 21, a flat layer 35 is disposed on a package layer 322, where the flat layer 35 may be a fully transparent material, a semi-transparent material, or a semi-reflective and semi-transparent material, in some optional embodiments, a layer of the flat layer 35 away from the first substrate 31 is a smooth plane, and the flat layer 35 may play a role of protecting a display film layer group, so as to prevent the package material from peeling off the display panel after long-time use of the display panel, which may cause the display material 323 to fall off, and affect the display effect and user experience.
Further, in some optional embodiments, before injecting the display material into the micro-grid groove structure, the manufacturing method further includes: a surfactant material is mixed within the display material. Fig. 22 is an enlarged view of area a in fig. 21, when the bottom surface of the carrier layer 321 is a plane parallel to the first substrate 31, the contact angle a between the display material 323 and the bottom surface of the micro-grid groove structure in the carrier layer 321 is equal to the contact angle a between the display material 323 and the first substrate 31, the purpose of mixing the surfactant material in the display material 323 is to adjust the contact angle a in fig. 22, and by controlling the magnitude of the contact angle a, the display material 323 is ensured to be semicircular, and in some alternative embodiments, the step of mixing the surfactant material in the display material includes: the mixing ratio of the display material 323 and the surfactant material is adjusted to adjust the contact angle a of the display material with the first substrate. The effect of different surfactant materials on the contact angle a is different, and the amount of the added surfactant material has a direct effect on the contact angle a, so that the contact angle a can be adjusted by adjusting the mixing ratio of the surfactant material to the display material 323. As shown in fig. 22, the shape of the display material 323 is set to be semicircular by adjusting the contact angle a, and the distance from any point on the edge of the display material, for example, point P3 in fig. 22, to the central point P2 of the semicircle is constant and equal to d2, and at this time, the display effect obtained when the display panel is viewed from any angle is nearly the same, thereby solving the problem of large difference in display effect obtained when the display panel is viewed from different angles in the related art.
Further, in some alternative embodiments, the step of processing the carrier layer by an exposure and development process to form a plurality of micro-grid groove structures on the surface of the carrier layer away from the first substrate includes: and adjusting the size of the micro-grid groove structure and/or adjusting the material of the carrier layer so as to adjust the contact angle between the display material and the first substrate. Fig. 23 is a graph showing the effect of reducing the size of the micro-groove structure in fig. 22, and as shown in fig. 22 and 23, when the bottom surface of the carrier layer 321 is a plane parallel to the first substrate 31, the contact angle a between the display material 323 and the bottom surface of the micro-groove structure in the carrier layer 321 is equal to the contact angle a between the display material 323 and the first substrate 31, and after the size of the micro-groove structure in fig. 22 is changed, the size of the contact angle a is changed, and the contact angle a in fig. 22 is significantly larger than the contact angle a in fig. 23, so that it can be known that the size of the contact angle a can be changed by adjusting the size of the micro-groove structure, and the shape of the display material 323 can be adjusted. By adjusting the material of the carrier layer, that is, the material of the micro-grid groove structure, the contact angle a between the display material 323 and the bottom surface of the micro-grid groove structure is changed, and the purpose of adjusting the shape of the display material 323 can also be achieved.
Further, in some alternative embodiments, the step of injecting the display material into the micro-cell structure comprises: the injection amount of the display material injected into the micro-grid groove structure is adjusted so as to adjust the contact angle between the display material and the first substrate. Fig. 24 is a diagram illustrating the effect of increasing the injection amount of the display material in the micro-grid groove structure in fig. 22, as shown in fig. 22 and fig. 24, when the bottom surface of the carrier layer 321 is a plane parallel to the first substrate 31, the contact angle a between the display material 323 and the bottom surface of the micro-grid groove structure in the carrier layer 321 is equal to the contact angle a between the display material 323 and the first substrate 31, and increasing the injection amount of the display material in the micro-grid groove structure will result in a change in the contact angle, and the contact angle a in fig. 22 is larger than the contact angle a in fig. 23, so that the shape of the display material is changed by adjusting the contact angle to be semicircular or semi-circular-like, or a part of the semicircular shape, thereby improving the display effect of the display panel viewed from different.
According to the embodiment, the display panel, the manufacturing method thereof and the display device of the invention have the following beneficial effects: the invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel and the display device comprise a first substrate, a carrier layer, a packaging layer and a display material, the carrier layer is provided with a micro-grid groove structure, by arranging the display material in the same layer, the thickness of the display panel and the display device is effectively reduced, by providing the micro-cell structure and disposing the display material in the micro-cell structure, mixing of the display materials of different colors is prevented, and each sub-pixel includes a plurality of micro-cell structures, for one sub-pixel, even if part of the micro-groove structure of the sub-pixel is damaged, since the normal micro-groove structure still exists in the sub-pixel, therefore, the influence on the display effect cannot be too large, the group assembling operation is not carried out in the preparation process, the requirement on the preparation process of the display panel is reduced, and the yield of the display panel is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (18)
1. A display panel, comprising:
a first substrate;
the display film layer group is arranged on one side of the first substrate and comprises a carrier layer, a packaging layer and a display material positioned between the carrier layer and the packaging layer;
the carrier layer is arranged close to the first substrate relative to the packaging layer, a plurality of micro-grid groove structures are arranged on the surface, far away from the first substrate, of the carrier layer, and the display material is arranged in the micro-grid groove structures;
the pixels of the display panel comprise a plurality of sub-pixels, each sub-pixel comprises a plurality of micro-grid groove structures, the area of one micro-grid groove structure is smaller than that of one sub-pixel, and the display materials in the micro-grid groove structures of the same sub-pixel are display materials with the same color;
every little lattice groove structure includes the recess and centers on the lateral wall that the recess set up, in the carrier layer, every three of being separated by the recess of little lattice groove structure is provided with a little lattice groove space, little lattice groove space includes two the lateral wall of little lattice groove structure.
2. The display panel of claim 1, wherein the encapsulation material of the encapsulation layer is disposed within the micro-grid groove structure.
3. The display panel of claim 2, wherein the display film layer group further comprises:
and the flat layer is arranged on one side of the packaging layer, which is far away from the carrier layer.
4. The display panel according to claim 1, wherein a contact surface of the display material with the encapsulation layer is a curved surface protruding to a side away from the first substrate.
5. The display panel according to claim 4, wherein a contact angle of the display material with the first substrate ranges from 50 degrees to 90 degrees.
6. The display panel of claim 4, wherein the display film layer group further comprises:
a surfactant material mixed with the display material.
7. The display panel according to claim 1, wherein a bottom surface of the micro-groove structure is a flat surface or a curved surface protruding toward the first substrate.
8. The display panel according to claim 1, further comprising:
a second substrate disposed opposite to the first substrate, the display film layer set being positioned between the first substrate and the second substrate,
the first substrate is an array substrate, or the second substrate is an array substrate.
9. The display panel according to claim 8,
the display material is a cholesteric liquid crystal material.
10. The display panel of claim 9, wherein the pixels of the display panel are divided into red, blue and green pixels, wherein cholesteric liquid crystal material in the red pixel reflects red light, cholesteric liquid crystal material in the blue pixel reflects blue light and cholesteric liquid crystal material in the green pixel reflects green light.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
12. A method for manufacturing a display panel is characterized by comprising the following steps:
manufacturing a first substrate;
forming a carrier layer on the first substrate by using a coating process;
processing the carrier layer by adopting an exposure and development process so as to enable the surface of the carrier layer, which is far away from the first substrate, to form a plurality of micro-grid groove structures, wherein the pixels of the display panel comprise a plurality of sub-pixels, each sub-pixel comprises a plurality of micro-grid groove structures, and the area of one micro-grid groove structure is smaller than that of one sub-pixel; each micro-grid groove structure comprises a groove and side walls arranged around the groove, and in the carrier layer, a micro-grid groove gap is arranged in each groove which is separated by three micro-grid groove structures and comprises two side walls of the micro-grid groove structure;
injecting a display material into the micro-grid groove structure, wherein the display materials in the plurality of micro-grid groove structures of the same sub-pixel are display materials with the same color;
and packaging the micro-grid groove structure to form a packaging layer.
13. The method for manufacturing a display panel according to claim 12,
the step of injecting a display material into the micro-cell structure comprises: injecting a display material into the micro-grid groove structure by using an ink-jet printing technology or a printing technology;
the step of encapsulating the micro-grid cell structure comprises: and injecting an encapsulating material into the micro-grid groove structure by using an ink-jet printing technology or a printing technology.
14. The method for manufacturing a display panel according to claim 13, wherein after the forming the encapsulation layer, the method further comprises:
and coating a flat layer on the surface of the packaging layer.
15. The method of claim 12, wherein before injecting a display material into the micro-grid groove structure, the method further comprises:
a surfactant material is mixed within the display material.
16. The method of claim 15, wherein the step of mixing a surfactant material in the display material comprises:
and adjusting the mixing ratio of the display material and the surfactant material to adjust the contact angle of the display material and the first substrate.
17. The method of claim 12, wherein the step of injecting the display material into the micro-grid groove structure comprises:
and adjusting the injection amount of the display material injected into the micro-grid groove structure so as to adjust the contact angle between the display material and the first substrate.
18. The method according to claim 12, wherein the step of processing the carrier layer by an exposure and development process to form a plurality of micro-groove structures on the surface of the carrier layer away from the first substrate comprises:
adjusting the size of the micro-grid groove structure and/or adjusting the material of the carrier layer to adjust the contact angle of the display material and the first substrate.
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| CN108963112B (en) * | 2018-07-19 | 2020-06-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN117420711A (en) * | 2023-06-12 | 2024-01-19 | 山东蓝贝思特教装集团股份有限公司 | Multicolor liquid crystal writing device and method |
| CN117092866A (en) * | 2023-06-14 | 2023-11-21 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device |
| CN117289514B (en) * | 2023-09-15 | 2024-05-14 | 南通芯洛图电子科技有限公司 | Anti-press reflective display device and manufacturing method thereof |
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