CN108363237B - Reflecting film, preparation method thereof, reflecting assembly and display device - Google Patents
Reflecting film, preparation method thereof, reflecting assembly and display device Download PDFInfo
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- CN108363237B CN108363237B CN201810212835.1A CN201810212835A CN108363237B CN 108363237 B CN108363237 B CN 108363237B CN 201810212835 A CN201810212835 A CN 201810212835A CN 108363237 B CN108363237 B CN 108363237B
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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
- G02F1/133553—Reflecting elements
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Abstract
The invention provides a reflecting film and a preparation method thereof, a reflecting assembly and a display device, and belongs to the technical field of display. The reflection assembly includes: a reflective film and a regulating circuit, the reflective film including: the reflective layer is arranged between the first transparent substrate and the second transparent substrate; the reflective layer includes: the liquid crystal display comprises a liquid crystal, a plurality of chiral anions in spiral arrangement and a spiral polymer, wherein the polymer comprises a plurality of polymerizable cations in spiral arrangement; the adjusting circuit is used for applying a preset electric field to the reflecting film so that the chiral anions move under the action of the preset electric field to change the content gradient of the chiral anions in the direction of the preset electric field, and the content gradient before the change and the content gradient after the change are not zero. The invention solves the problem of poor performance of the reflecting film. The invention is used for preparing the reflecting film.
Description
Technical Field
The invention relates to the technical field of display, in particular to a reflecting film, a preparation method of the reflecting film, a reflecting assembly and a display device.
Background
With the development of technology, the application of display devices is becoming more and more extensive, and display devices usually include a backlight module, and the backlight module includes a light source, a light guide plate and a reflective film.
The reflective film is disposed on the light-transmitting side of the light guide plate, and the light source is disposed on the side surface of the light guide plate and used for emitting light to the light guide plate. The reflective film is used to reflect light toward the light guide plate. Wherein, the reflecting film includes: the liquid crystal display device comprises two transparent substrates and a reflecting layer positioned between the two transparent substrates, wherein the reflecting layer comprises liquid crystal which has a screw pitch along a certain direction and the screw pitch gradient is not zero. The reflective layer is used for reflecting light, and it should be noted that the pitch gradient of the liquid crystal is related to the light that can be reflected by the reflective layer, and when the pitch gradient of the liquid crystal is larger, the wavelength range of the light that can be reflected by the reflective layer is larger.
Because the pitch gradient of the liquid crystal in the reflecting layer is fixed in the related technology, the wavelength range of the light rays which can be reflected by the reflecting film is fixed, the wavelength range of the light rays which can be reflected by the reflecting film is not adjustable, and the performance of the reflecting film is poor.
Disclosure of Invention
The application provides a reflective film, a preparation method thereof, a reflective assembly and a display device, which can solve the problem of poor performance of the reflective film in the related technology, and the technical scheme is as follows:
in one aspect, a reflective assembly is provided, the reflective assembly comprising: a reflective film and a conditioning circuit, the reflective film comprising: the display device comprises a first transparent substrate, a second transparent substrate and a reflecting layer, wherein the first transparent substrate and the second transparent substrate are oppositely arranged, and the reflecting layer is arranged between the first transparent substrate and the second transparent substrate;
the reflective layer includes: the liquid crystal display comprises a liquid crystal, a plurality of chiral anions in a spiral arrangement and a spiral polymer, wherein the polymer comprises a plurality of polymerizable cations in a spiral arrangement;
the adjusting circuit is used for applying a preset electric field to the reflecting film so that the chiral anions move under the action of the preset electric field to change the content gradient of the chiral anions in the direction of the preset electric field, and the content gradient before the change and the content gradient after the change are not zero.
Optionally, the pitch gradient of the liquid crystal is X, and X is more than or equal to 250 nanometers and less than or equal to 300 nanometers.
Optionally, the reflective layer further includes: a chiral molecule, or, the polymer further comprises: a chiral molecule.
Optionally, the first transparent substrate and the second transparent substrate are both flexible substrates.
Optionally, the first transparent substrate and the second transparent substrate are both non-flexible substrates.
Optionally, the reflective film further comprises: the frame sealing glue comprises a first orientation layer, a second orientation layer and frame sealing glue; the first alignment layer is arranged on one side of the first transparent substrate close to the second transparent substrate, and the second alignment layer is arranged on one side of the second transparent substrate close to the first transparent substrate; the first alignment layer and the second alignment layer are used for enabling the pretilt angle of the liquid crystal to be smaller than 1 degree; the frame sealing glue is positioned between the first transparent substrate and the second transparent substrate and is used for sealing the reflecting layer.
In another aspect, there is provided a method for manufacturing a reflective film belonging to the above reflective member, the method comprising: manufacturing an initial structure, wherein the initial structure comprises a first transparent substrate and a second transparent substrate which are oppositely arranged, and a reactant positioned between the first transparent substrate and the second transparent substrate; placing the initial structure in a preset force field, and irradiating the initial structure by adopting ultraviolet light to enable the reactant to perform photosensitive reaction to form a reflecting layer, wherein the direction of the preset force field is perpendicular to the first transparent substrate; the reflecting layer comprises liquid crystal, a plurality of chiral anions in spiral arrangement and a spiral polymer, the polymer comprises a plurality of polymerizable cations in spiral arrangement, and the content gradient of the chiral anions in the direction of the preset force field is not zero.
Optionally, the preset force field is a gravitational field, and the reactant includes: nematic liquid crystal, chiral molecules, a chiral ion set, a liquid crystal monomer, and a photoinitiator, the chiral ion set comprising: a polymerizable cation and a chiral anion; the ratio of the nematic liquid crystal, the chiral molecules, the chiral ion set, the liquid crystal monomer and the photoinitiator is 100: 4: 3: 4: 0.2; the irradiating the initial structure with ultraviolet light includes: at 35 degrees centigrade ambient temperature, adopt the ultraviolet irradiation initial structure, the intensity of ultraviolet is 1 milliwatt per square centimeter, the irradiation duration of ultraviolet is 1800 seconds.
Optionally, the preset force field is a centrifugal force field, and the reactants include: nematic liquid crystal, chiral molecules, a chiral ion set, a liquid crystal monomer, and a photoinitiator, the chiral ion set comprising: a polymerizable cation and a chiral anion; the ratio of the nematic liquid crystal, the chiral molecules, the chiral ion set, the liquid crystal monomer and the photoinitiator is 100: 4: 3: 3: 0.2; the irradiating the initial structure with ultraviolet light includes: at the ambient temperature of 25 ℃, adopt the ultraviolet irradiation initial structure, the intensity of ultraviolet is 10 milliwatts per square centimeter, the irradiation duration of ultraviolet is 200 seconds.
In still another aspect, a display device is provided, which includes the above-described reflection assembly.
The beneficial effect that technical scheme that this application provided brought is: the adjusting circuit can apply a preset electric field to the reflecting film so that the plurality of chiral anions move forwards or backwards along the preset direction under the action of the preset electric field, and the pitch gradient of the liquid crystal along the preset direction is changed by changing the content gradient of the plurality of chiral anions along the preset direction; further, the wavelength range of light rays reflected by the reflecting film can be adjusted, and the adjusting performance of the reflecting film is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a reflection assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the arrangement of a plurality of chiral anions and liquid crystals when a predetermined electric field is applied to the reflective film in FIG. 1 in the same direction as the predetermined direction;
FIG. 3 is a schematic diagram showing the arrangement of a plurality of chiral anions and liquid crystals when a predetermined electric field is applied to the reflective film of FIG. 1 in a direction opposite to the predetermined direction;
FIG. 4 is a schematic structural diagram of another reflective assembly according to an embodiment of the present invention;
FIG. 5 is a flow chart of a method for manufacturing a reflective film according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for fabricating an initial structure according to an embodiment of the present invention;
FIG. 7 is a flowchart of a method of forming a reflective layer according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating the position of an initial structure in a gravitational field according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an embodiment of the present invention providing polymer precipitation in reactants in a gravitational field;
fig. 10 is a schematic diagram of a polymer collected near one side of a first transparent substrate in a gravitational field according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a reflective film formed in a gravitational field according to an embodiment of the present invention;
FIG. 12 is a flow chart of another method for forming a reflective layer according to an embodiment of the present invention;
FIG. 13 is a schematic illustration of the position of an initial structure in a centrifugal field provided by an embodiment of the present invention;
FIG. 14 is a schematic illustration of polymer precipitated from reactants in a centrifugal field as provided by an embodiment of the present invention;
FIG. 15 is a schematic illustration of a polymer collected near a side of a first transparent substrate in a centrifugal field provided by an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a reflective film formed in a centrifugal field according to an embodiment of the present invention.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Display devices are increasingly used, and generally include a backlight module including a reflective film. The reflective film comprises a reflective layer for reflecting light, the reflective layer comprises liquid crystal with a non-zero pitch gradient, the pitch gradient of the liquid crystal is related to the wavelength range of the light which can be reflected by the reflective layer, and the pitch gradient of the liquid crystal in the reflective layer is fixed, so that the wavelength range of the light which can be reflected by the reflective film is fixed, namely the wavelength range of the light which can be reflected by the reflective film is not adjustable, and the performance of the reflective film is poor.
Fig. 1 is a schematic structural diagram of a reflection assembly according to an embodiment of the present invention, and as shown in fig. 1, the reflection assembly may include: a reflective film 10 and a conditioning circuit (not shown in fig. 1), the reflective film 10 may include: the display device comprises a first transparent substrate 101, a second transparent substrate 102 and a reflecting layer 103, wherein the first transparent substrate 101 and the second transparent substrate 102 are oppositely arranged, and the reflecting layer 103 is arranged between the first transparent substrate 101 and the second transparent substrate 102.
The reflective layer 103 includes: a liquid crystal 1033, a plurality of chiral anions 1031 in a helical arrangement, and a helical polymer 1032, the polymer 1032 comprising a plurality of polymerizable cations (not shown in fig. 1) in a helical arrangement. The adjusting circuit is configured to apply a preset electric field to the reflective film 10, so that the plurality of chiral anions 1031 move under the action of the preset electric field to change a content gradient of the plurality of chiral anions 1031 in the direction of the preset electric field, where the content gradient before the change and the content gradient after the change are both nonzero.
In summary, in the reflection assembly provided in the embodiment of the invention, the adjustment circuit can apply the preset electric field to the reflection film, so that the plurality of chiral anions move under the action of the preset electric field to change the content gradient of the plurality of chiral anions in the direction of the preset electric field; the pitch gradient of the liquid crystal in the direction of the preset electric field is in direct proportion to the content gradient of the chiral anions in the direction of the preset electric field; the adjusting circuit can apply a preset electric field to the reflecting film to change the content gradient of the plurality of chiral anions in the direction of the preset electric field, so that the wavelength range of light rays reflected by the reflecting film can be adjusted, and the performance of the reflecting film is improved.
Optionally, the pitch gradient of the liquid crystal 1033 is X, and X is greater than or equal to 250 nm and less than or equal to 300 nm. It should be noted that, in the embodiment of the present invention, only 250 nm ≦ X ≦ 300 nm is taken as an example for description, in practical applications, the range of X may also be other ranges, for example, 100 nm ≦ X ≦ 300 nm, and the embodiment of the present invention does not limit this. Alternatively, the liquid crystal 1033 may be a cholesteric liquid crystal.
Further, the wavelength range of light that the reflective member can reflect includes a wavelength range of visible light (380 nm to 780 nm).
With continued reference to fig. 1, when the adjustment circuit does not apply the predetermined electric field to the reflective film 10, the plurality of chiral anions 1031 are adsorbed on the plurality of polymerizable cations, and the content gradients of the plurality of chiral anions 1031 and the plurality of polymerizable cations along the predetermined direction P1 are the same; and the minimum pitch and the maximum pitch of the liquid crystal 1033 may be D1 and D2, respectively, and the pitch gradient X of the liquid crystal 1033 along the preset direction P1 is D2-D1.
It should be noted that the direction of the preset electric field applied to the reflective film 10 by the adjusting circuit may be the same as or opposite to the preset direction P1; when the direction of the preset electric field applied to the reflective film 10 by the adjusting circuit is the same as the preset direction P1, the plurality of chiral anions move in the opposite direction of the preset direction P1, and when the direction of the preset electric field applied to the reflective film 10 by the adjusting circuit is opposite to the preset direction P1, the plurality of chiral anions move in the preset direction P1.
As shown in fig. 2, when the adjustment circuit applies a preset electric field having the same direction as the preset direction P1 to the reflective film 10, the plurality of chiral anions 1031 move in the opposite direction of the preset direction P1. The minimum pitch and the maximum pitch of the liquid crystal 1033 at this time may be D3 and D4, respectively, the pitch gradient X of the liquid crystal 1033 in the preset direction P1 is D4-D3, and D4-D3> D2-D1. That is, the pitch gradient of the liquid crystal 1033 in the predetermined direction P1 becomes larger, and the wavelength range of the light reflected by the reflection film becomes larger.
As shown in fig. 3, when the adjusting circuit applies a preset electric field having a direction opposite to the preset direction to the reflective film 10; the plurality of chiral anions 1031 move along the preset direction P1, so that the content gradient of the plurality of chiral anions 1031 along the preset direction P1 becomes smaller, at this time, the minimum pitch and the maximum pitch of the liquid crystal 1033 may be D5 and D6, respectively, the pitch gradient X of the liquid crystal 1033 along the preset direction P1 is D6-D5, and D6-D5< D2-D1; that is, the pitch gradient of the liquid crystal 1033 in the predetermined direction P1 becomes small, and the wavelength range of the light reflected by the reflective film becomes small.
Fig. 4 is a schematic structural diagram of another reflective assembly according to an embodiment of the present invention, and as shown in fig. 4, on the basis of fig. 1, the reflective film 10 may further include: a first alignment layer 104, a second alignment layer 105 and a frame sealing adhesive 106; the first alignment layer 104 is arranged on one side of the first transparent substrate 101 close to the second transparent substrate 102, and the second alignment layer 105 is arranged on one side of the second transparent substrate 102 close to the first transparent substrate 101; the first alignment layer 104 and the second alignment layer 105 are used to make the pretilt angle of the liquid crystal 1033 less than 1 degree, and the sealant 106 is located between the first transparent substrate 101 and the second transparent substrate 102 and used to seal the reflective layer 103.
Optionally, the reflective layer 103 may further include: chiral molecules 1034. It should be noted that, in the embodiment of the present invention, only the reflective layer 103 includes the chiral molecule 1034 is taken as an example, in practical applications, the reflective layer 103 may not include the chiral molecule 1034, and the polymer 1032 may also include the chiral molecule 1034, that is, the chiral molecule 1034 may be formed in the polymer 1032, which is not limited in the embodiment of the present invention.
Alternatively, both the first transparent substrate 101 and the second transparent substrate 102 may be flexible substrates. At this time, the reflective member may be used for a flexible display device; illustratively, the first transparent substrate 101 and the second transparent substrate 102 may each be a flexible conductive plastic substrate.
Optionally, the first transparent substrate 101 and the second transparent substrate 102 may be non-flexible substrates, and for example, the first transparent substrate and the second transparent substrate may be transparent conductive glass substrates.
When the reflection assembly provided by the embodiment of the invention is used, if the wavelength range of light reflected by the reflection film is required to be enlarged, the adjusting circuit can be controlled to apply a preset electric field to the reflection film, wherein the direction of the preset electric field is the same as the preset direction, so that a plurality of chiral anions move along the opposite direction of the preset direction under the action of the preset electric field; so as to increase the pitch gradient of the liquid crystal along the preset direction by increasing the content gradient of the plurality of chiral anions along the preset direction, thereby increasing the wavelength range of the light reflected by the reflective film.
If the wavelength range of the light reflected by the reflecting film is reduced, the adjusting circuit can be controlled to apply a preset electric field to the reflecting film, wherein the direction of the preset electric field is opposite to the preset direction, so that the plurality of chiral anions move along the preset direction under the action of the preset electric field; so as to reduce the pitch gradient of the liquid crystal along the preset direction by reducing the content gradient of the plurality of chiral anions along the preset direction, thereby reducing the wavelength range of the light reflected by the reflecting film.
In summary, in the reflection assembly provided in the embodiment of the invention, the adjustment circuit can apply the preset electric field to the reflection film, so that the plurality of chiral anions move under the action of the preset electric field to change the content gradient of the plurality of chiral anions in the direction of the preset electric field; the pitch gradient of the liquid crystal in the direction of the preset electric field is in direct proportion to the content gradient of the chiral anions in the direction of the preset electric field; the adjusting circuit can apply a preset electric field to the reflecting film to change the content gradient of the plurality of chiral anions in the direction of the preset electric field, so that the wavelength range of light rays reflected by the reflecting film can be adjusted, and the performance of the reflecting film is improved.
It should be noted that the reflection assembly provided in the embodiments of the present invention may be used in a display device having a backlight module, where the backlight module includes the reflection assembly, and the reflection assembly is used for reflecting light emitted from a backlight source in the backlight module. In addition, the reflection assembly provided by the embodiment of the invention can also be used for a reflection type display device, and the reflection type display device can reflect external light rays to display images through the reflection assembly. In the reflection assembly provided by the embodiment of the invention, the wavelength range of the light reflected by the reflection film can be adjusted, so that the color gamut of the display device where the reflection assembly is positioned can be adjusted.
Fig. 5 is a flowchart of a method for manufacturing a reflective film according to an embodiment of the present invention, where the method for manufacturing a reflective film can be used to manufacture a reflective film in a reflective assembly shown in any one of fig. 1 to 4, and as shown in fig. 5, the method for manufacturing a reflective film can include:
As an example, as shown in fig. 6, step 501 may include:
In forming the alignment layer on each of the first and second transparent substrates, an alignment material layer may be first formed on the substrate and then processed to form the alignment layer.
By way of example, the reactants may include: nematic liquid crystal, chiral molecules, a chiral ion set, a liquid crystal monomer, and a photoinitiator, the chiral ion set may include: polymerizable cations and chiral anions. And the ratio of nematic liquid crystal, chiral molecules, chiral ion set, liquid crystal monomer and photoinitiator may be 100: n 1: n 2: n 3: n 4; wherein n1 is more than or equal to 3 and less than or equal to 4, n2 is more than or equal to 3 and less than or equal to 4, n3 is more than or equal to 3 and less than or equal to 5, and n4 is more than or equal to 0.1 and less than or equal to 0.3.
In step 5016, the first transparent substrate and the second transparent substrate are encapsulated by using the sealant to form an initial structure.
After the initial structure is formed in step 5016, the worker may also heat the initial structure at a temperature of 60 degrees celsius for 30 minutes to allow the reactants in the initial structure to mix uniformly.
The direction of the preset force field is perpendicular to the first transparent substrate, the reflecting layer can comprise liquid crystal, a plurality of chiral anions which are spirally arranged and a spiral polymer, and the polymer can comprise a plurality of polymerizable cations which are spirally arranged.
It should be noted that there are various realizable manners for forming the reflective layer in step 502, and for example, the following describes the forming process of the reflective layer in two realizable manners of the various realizable manners:
in a first implementation manner of step 502, the predetermined force field is a gravitational field, and the ratio of nematic liquid crystal, chiral molecules, chiral ion set, liquid crystal monomer and photoinitiator may be 100: 4: 3: 4: 0.2. as shown in fig. 7, step 502 may include:
5021A, placing the initial structure in a gravity field.
As shown in fig. 8, after the initial structure 20 is placed in the gravitational field F1 in step 5021A, the direction of the gravitational field F1 is perpendicular to the first transparent substrate 101; the initial structure 20 further includes a second transparent substrate 102, a first alignment layer 104, a second alignment layer 105, a reactant (not shown in fig. 8), and a sealant 106.
For example, the intensity of the ultraviolet light may be 1 milliwatt per square centimeter, and the irradiation time period of the ultraviolet light may be 1800 seconds.
In step 5022A, a spiral polymer is formed, and as an example, the spiral polymer may be formed as shown in fig. 9 to 11: after irradiating the initial structure with ultraviolet light L1 in step 5022A, as shown in fig. 9, polymer 1032 precipitates in the reactants (not shown in fig. 9) of the initial structure; then, as shown in fig. 10, under the action of the gravitational field F1, the polymer 1032 is gathered at the side close to the first transparent substrate 101, and the polymer 1032 is helical; the resulting polymer 1032 may be as shown in fig. 11.
In a second implementation manner of step 502, the preset force field is a centrifugal force field, and the ratio of the nematic liquid crystal, the chiral molecules, the chiral ion set, the liquid crystal monomer and the photoinitiator may be 100: 4: 3: 3: 0.2. as shown in fig. 12, step 502 may include:
5021B, placing the initial structure into a centrifuge.
For example, the centrifugal acceleration of the centrifuge may be greater than 2 times the gravitational acceleration, and the direction of the centrifugal force field F2 that can be generated by the centrifuge is perpendicular to the first transparent substrate 101.
As shown in fig. 13, after a centrifuge (not shown in fig. 13) is activated 5022B to make the initial structure 20 perform a centrifugal motion, the direction of the first transparent substrate 101 away from the second transparent substrate 102 in the initial structure 20 may be the same as the direction of the centrifugal force field F2 generated by the centrifuge. The initial structure 20 further includes a first alignment layer 104, a second alignment layer 105, a reactant (not shown in fig. 13), and a sealant 106.
And step 5023B, irradiating the initial structure with ultraviolet light at the ambient temperature of 25 ℃ to enable the reactant to perform photosensitive reaction to form a reflecting layer so as to form a reflecting film.
For example, the intensity of the ultraviolet light may be 10 milliwatts per square centimeter, and the irradiation time of the ultraviolet light may be 200 seconds.
In step 5023B, a spiral polymer is formed, and for example, the spiral polymer may be formed as shown in fig. 14 to 16: after irradiating the initial structure with ultraviolet light L2 in step 5023B, as shown in fig. 14, polymer 1032 precipitates in the reactants (not shown in fig. 14) of the initial structure; then, as shown in fig. 15, under the action of the centrifugal force field F2, the polymer 1032 is gathered at the side close to the first transparent substrate 101, and the polymer 1032 takes a spiral shape; the resulting polymer 1032 may be as shown in fig. 16.
It should be noted that the reflective film and the adjusting circuit formed in step 502 may constitute the reflective assembly shown in fig. 4. The adjusting circuit is used for applying a preset electric field to the reflecting film, and the adjusting circuit can be arranged on the reflecting film to form an integral structure with the reflecting film or be arranged separately from the reflecting film. And the direction of the preset electric field generated by the adjusting circuit may be parallel to the direction of the gravity field in step 5021A, or parallel to the direction of the centrifugal force field generated by the centrifuge in step 5021B.
In summary, in the reflective assembly to which the reflective film prepared by the method for preparing the reflective film according to the embodiment of the present invention belongs, the adjusting circuit can apply the predetermined electric field to the reflective film, so that the plurality of chiral anions move under the action of the predetermined electric field to change the content gradient of the plurality of chiral anions in the direction of the predetermined electric field; the pitch gradient of the liquid crystal in the direction of the preset electric field is in direct proportion to the content gradient of the chiral anions in the direction of the preset electric field; the adjusting circuit can apply a preset electric field to the reflecting film to change the content gradient of the plurality of chiral anions in the direction of the preset electric field, so that the wavelength range of light rays reflected by the reflecting film can be adjusted, and the performance of the reflecting film is improved.
Embodiments of the present invention also provide a display device, which may include the reflection assembly shown in fig. 1 or 4. Optionally, the display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
It should be noted that, the embodiments of the reflective assembly, the embodiments of the method for manufacturing the reflective film, and the embodiments of the display device provided in the embodiments of the present invention may all be referred to each other, and the embodiments of the present invention are not limited thereto.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A reflective assembly, wherein the range of wavelengths of light that the reflective assembly is capable of reflecting includes a range of wavelengths of visible light, the reflective assembly comprising: a reflective film and a conditioning circuit, the reflective film comprising: the display device comprises a first transparent substrate, a second transparent substrate and a reflecting layer, wherein the first transparent substrate and the second transparent substrate are oppositely arranged, and the reflecting layer is arranged between the first transparent substrate and the second transparent substrate;
the reflective layer includes: the ultraviolet-light-emitting device comprises liquid crystal, a plurality of chiral anions in spiral arrangement and a spiral polymer formed by ultraviolet light irradiation under a preset force field, wherein the direction of the preset force field is perpendicular to the first transparent substrate, the density of the polymer on one side close to the ultraviolet light is higher than that of the polymer on one side far away from the ultraviolet light, and the polymer comprises a plurality of polymerizable cations in spiral arrangement;
the adjusting circuit is used for applying a preset electric field to the reflecting film, so that the chiral anions move under the action of the preset electric field to change the content gradient of the chiral anions in the direction of the preset electric field, the content gradient before and after the change is not zero, the selection range of the direction of the preset electric field is the same as the preset direction and opposite to the preset direction, and the preset direction is pointed to by the first transparent substrate and the second transparent substrate.
2. The reflective assembly of claim 1,
the pitch gradient of the liquid crystal is X, and X is more than or equal to 250 nanometers and less than or equal to 300 nanometers.
3. The reflective assembly of claim 1,
the reflective layer further includes: a chiral molecule, or, the polymer further comprises: a chiral molecule.
4. The reflective assembly of claim 1,
the first transparent substrate and the second transparent substrate are both flexible substrates.
5. The reflective assembly of claim 1,
the first transparent substrate and the second transparent substrate are both non-flexible substrates.
6. The reflective assembly of claim 1, wherein the reflective film further comprises: the frame sealing glue comprises a first orientation layer, a second orientation layer and frame sealing glue;
the first alignment layer is arranged on one side of the first transparent substrate close to the second transparent substrate, and the second alignment layer is arranged on one side of the second transparent substrate close to the first transparent substrate; the first alignment layer and the second alignment layer are used for enabling the pretilt angle of the liquid crystal to be smaller than 1 degree;
the frame sealing glue is positioned between the first transparent substrate and the second transparent substrate and is used for sealing the reflecting layer.
7. A method of making a reflective film, wherein the reflective film is of the reflective assembly of any of claims 1 to 4, the method comprising:
manufacturing an initial structure, wherein the initial structure comprises a first transparent substrate and a second transparent substrate which are oppositely arranged, and a reactant positioned between the first transparent substrate and the second transparent substrate;
placing the initial structure in a preset force field, and irradiating the initial structure by adopting ultraviolet light to enable the reactant to perform photosensitive reaction to form a reflecting layer, wherein the direction of the preset force field is perpendicular to the first transparent substrate;
the reflecting layer comprises liquid crystal, a plurality of chiral anions in spiral arrangement and a spiral polymer, the polymer comprises a plurality of polymerizable cations in spiral arrangement, and the content gradient of the chiral anions in the direction of the preset force field is not zero.
8. The method of claim 7, wherein the predetermined force field is a gravitational field and the reactant comprises: nematic liquid crystal, chiral molecules, a chiral ion set, a liquid crystal monomer, and a photoinitiator, the chiral ion set comprising: a polymerizable cation and a chiral anion; the ratio of the nematic liquid crystal, the chiral molecules, the chiral ion set, the liquid crystal monomer and the photoinitiator is 100: 4: 3: 4: 0.2;
the irradiating the initial structure with ultraviolet light includes: at 35 degrees centigrade ambient temperature, adopt the ultraviolet irradiation initial structure, the intensity of ultraviolet is 1 milliwatt per square centimeter, the irradiation duration of ultraviolet is 1800 seconds.
9. The method of claim 7, wherein the predetermined force field is a centrifugal force field and the reactants comprise: nematic liquid crystal, chiral molecules, a chiral ion set, a liquid crystal monomer, and a photoinitiator, the chiral ion set comprising: a polymerizable cation and a chiral anion; the ratio of the nematic liquid crystal, the chiral molecules, the chiral ion set, the liquid crystal monomer and the photoinitiator is 100: 4: 3: 3: 0.2;
the irradiating the initial structure with ultraviolet light includes: at the ambient temperature of 25 ℃, adopt the ultraviolet irradiation initial structure, the intensity of ultraviolet is 10 milliwatts per square centimeter, the irradiation duration of ultraviolet is 200 seconds.
10. A display device, characterized in that the display device comprises a reflective assembly according to any one of claims 1 to 6.
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| JP2008064881A (en) * | 2006-09-05 | 2008-03-21 | Nec Lcd Technologies Ltd | Liquid crystal display device |
| CN101373233B (en) * | 2008-10-21 | 2010-06-16 | 北京科技大学 | Method for preparing circular polarization sheet to select reflection wave width controlled by electric field |
| JP5681404B2 (en) * | 2010-07-22 | 2015-03-11 | 富士フイルム株式会社 | Method for producing light reflective film and light reflective film |
| CN103074074A (en) * | 2011-10-26 | 2013-05-01 | 东莞万士达液晶显示器有限公司 | Light-modulatable composition and formation method |
| CN102722053B (en) * | 2012-06-15 | 2015-04-01 | 合肥工业大学 | Cholesteric liquid crystal display device with adjustable reflection bandwidth |
| CN104090444B (en) * | 2014-07-02 | 2016-12-07 | 合肥工业大学 | A kind of broadband cholesteric phase liquid crystal device based on chiral ion monomer and preparation technology thereof |
| CN106646985B (en) * | 2016-11-16 | 2021-06-22 | 深圳市国华光电科技有限公司 | Infrared reflecting device with tunable wave band and preparation method thereof |
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