CN110441936B - Filter, filtering device, driving method of filter and preparation method of driving method - Google Patents

Filter, filtering device, driving method of filter and preparation method of driving method Download PDF

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Publication number
CN110441936B
CN110441936B CN201910750962.1A CN201910750962A CN110441936B CN 110441936 B CN110441936 B CN 110441936B CN 201910750962 A CN201910750962 A CN 201910750962A CN 110441936 B CN110441936 B CN 110441936B
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electrode
filter
substrate
layer
electrodes
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CN110441936A (en
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付剑波
吴海龙
但艺
周欢
韩燕淋
周焱
朱海鹏
梁鹏
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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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 
    • G02F1/0102—Constructional details, not otherwise provided for in this subclass
    • 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
    • G02F1/1313—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 specially adapted for a particular application
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention discloses a filter, a filtering device, a driving method of the filter and a preparation method of the filter. When broadband light is incident on the liquid crystal material, the liquid crystal material can reflect the incident light with the characteristic wavelength corresponding to the changed effective refractive index, the incident light with other wavelengths is continuously transmitted through the liquid crystal material, the incident light with the characteristic wavelength corresponding to the changed effective refractive index is further selected, and the filter can further realize the function of selecting the light with the specific wavelength.

Description

Filter, filtering device, driving method of filter and preparation method of driving method
Technical Field
The invention relates to the technical field of optics, in particular to a filter, a filtering device, a driving method of the filter and a preparation method of the filter.
Background
Filters are key devices in optical communications. The filter is used for selecting light waves with specified wavelengths, filtering noise, realizing gain equalization and the like in an optical communication system filter.
Disclosure of Invention
The embodiment of the invention provides a filter, a filtering device, a driving method of the filter and a preparation method of the filter, which are used for selecting light waves with specific wavelengths.
Accordingly, an embodiment of the present invention provides a filter, where the filter includes: the liquid crystal display panel comprises a first substrate, a second substrate, an electrode layer and a liquid crystal material, wherein the first substrate and the second substrate are oppositely arranged, and the electrode layer and the liquid crystal material are positioned between the first substrate and the second substrate;
the electrode layer includes: a plurality of first electrodes and a plurality of second electrodes; wherein the first electrodes and the second electrodes are alternately arranged at intervals; and a liquid crystal material is encapsulated between the adjacent first electrode and the second electrode.
Optionally, in this embodiment of the present invention, the filter further includes: the first alignment layer is located between the first substrate and the electrode layer, and the second alignment layer is located between the second substrate and the electrode layer.
Optionally, in the embodiment of the present invention, the filter further includes a first trace; the first electrodes are electrically connected with the first wires.
Optionally, in an embodiment of the present invention, the first trace and the plurality of first electrodes are disposed in the same material layer.
Optionally, in this embodiment of the present invention, the filter further includes: the first routing layer comprises a plurality of second routing lines; at least one first electrode is taken as a first electrode group;
the first routing layer is positioned between the first alignment layer and the first substrate, and one second routing is correspondingly and electrically connected with all the first electrodes in one first electrode group through a first via hole penetrating through the first alignment layer; alternatively, the first and second electrodes may be,
the first routing layer is located between the second alignment layer and the second substrate, and one second routing is correspondingly and electrically connected with all the first electrodes in one first electrode group through a second via hole penetrating through the second alignment layer.
Optionally, in this embodiment of the present invention, the filter further includes a third trace; the second electrodes are electrically connected with the third wires.
Optionally, in an embodiment of the present invention, the third trace and the plurality of second electrodes are disposed in the same material layer.
Optionally, in this embodiment of the present invention, the filter further includes: the second routing layer comprises a plurality of fourth routing lines; at least one second electrode is taken as a second electrode group;
the second routing layer is positioned between the first alignment layer and the first substrate, and one fourth routing is correspondingly and electrically connected with all the second electrodes in one second electrode group through a first via hole penetrating through the first alignment layer; alternatively, the first and second electrodes may be,
the second routing layer is located between the second alignment layer and the second substrate, and one fourth routing is correspondingly and electrically connected with all the second electrodes in one second electrode group through a second via hole penetrating through the second alignment layer.
Correspondingly, the embodiment of the invention also provides a filtering device provided by the embodiment of the invention, and the filtering device comprises the filter.
Correspondingly, an embodiment of the present invention further provides a method for driving a filter, where the method for driving a filter includes:
loading a first voltage on the first electrode and loading a second voltage on the second electrode to control the effective refractive index of the liquid crystal material to change and filter light with characteristic wavelength corresponding to the changed effective refractive index; wherein the first voltage is not equal to the second voltage.
Correspondingly, the embodiment of the invention also provides a manufacturing method of the filter provided by the embodiment of the invention, and the manufacturing method of the filter comprises the following steps:
forming the electrode layer on the first substrate; wherein the electrode layer comprises the plurality of first electrodes and the plurality of second electrodes;
forming the liquid crystal material between adjacent first and second electrodes;
and forming a second substrate on one side of the electrode layer, which is far away from the first substrate, so as to carry out box packaging through the second substrate and the first substrate.
The filter comprises a first substrate and a second substrate which are oppositely arranged, and an electrode layer and a liquid crystal material which are positioned between the first substrate and the second substrate, wherein the electrode layer comprises a first electrode and a second electrode, and the liquid crystal material is packaged between the adjacent first electrode and the second electrode. The first electrode is loaded with a first voltage, the second electrode is loaded with a second voltage, the first voltage is not equal to the second voltage, a voltage difference is formed between the first electrode and the second electrode, liquid crystal molecules in the liquid crystal material deflect under the action of the voltage difference, and then the effective refractive index of the liquid crystal material is changed. When broadband light is incident on the liquid crystal material, the liquid crystal material can reflect light with the characteristic wavelength corresponding to the changed effective refractive index, light with other wavelengths is continuously transmitted through the liquid crystal material, light with the characteristic wavelength corresponding to the changed effective refractive index is selected, and the filter can further achieve the effect of selecting light with specific wavelength.
Drawings
Fig. 1 is a schematic top view of a filter according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the filter shown in FIG. 1 in the direction AA';
FIG. 3 is a schematic cross-sectional view of the filter shown in FIG. 1 in the direction AA';
FIG. 4 is a schematic diagram of an embodiment of a filter;
FIG. 5 is a schematic diagram of another filter operating principle according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a top view of another filter according to an embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of the filter shown in FIG. 6 in the direction AA';
FIG. 8 is a schematic diagram of a top view of another filter in an embodiment of the present application;
FIG. 9 is a schematic cross-sectional view of the filter shown in FIG. 8 in the direction AA';
FIG. 10 is a schematic cross-sectional view of another filter according to an embodiment of the present application;
FIG. 11 is a flow chart of a method for manufacturing a filter according to an embodiment of the present disclosure;
fig. 12 a-12 g are schematic diagrams illustrating a method for manufacturing a filter according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a filter, a filtering apparatus and a driving method thereof according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It should be noted that the film thicknesses and shapes of the respective layers in the drawings are not to be interpreted as true proportions, but are merely intended to illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In view of the above, referring to fig. 1 and fig. 2, an embodiment of the present invention provides a filter, which may include: a first substrate 101 and a second substrate 102 which are oppositely arranged, and an electrode layer 103 and a liquid crystal material 104 which are positioned between the first substrate 101 and the second substrate 102; the electrode layer 103 includes: a plurality of first electrodes 1031 and a plurality of second electrodes 1032; wherein the first electrodes 1031 and the second electrodes 1032 are alternately arranged at intervals; and a liquid crystal material 104 is encapsulated between the adjacent first and second electrodes 1031 and 1032.
The filter provided by the embodiment of the invention comprises a first substrate and a second substrate which are oppositely arranged, and an electrode layer and a liquid crystal material which are positioned between the first substrate and the second substrate, wherein the electrode layer comprises a first electrode and a second electrode, and the liquid crystal material is packaged between the adjacent first electrode and the second electrode. The first electrode is loaded with a first voltage, the second electrode is loaded with a second voltage, the first voltage is not equal to the second voltage, a voltage difference is formed between the first electrode and the second electrode, liquid crystal molecules in the liquid crystal material deflect under the action of the voltage difference, and then the effective refractive index of the liquid crystal material is changed. When broadband light is incident on the liquid crystal material, the liquid crystal material can reflect the incident light with the characteristic wavelength corresponding to the changed effective refractive index, the incident light with other wavelengths is continuously transmitted through the liquid crystal material, the incident light with the characteristic wavelength corresponding to the changed effective refractive index is further selected, and the filter can further realize the function of selecting the light with the specific wavelength.
Example one
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 1 and fig. 3, the filter further includes a first alignment layer 105 and a second alignment layer 106, the first alignment layer 105 is located between the first substrate 101 and the electrode layer 103, and the second alignment layer 106 is located between the second substrate 102 and the electrode layer 103. Wherein the material of the first alignment layer 105 and the second alignment layer 106 may include polyimide.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 3, a schematic top view structure of the filter is shown, the filter further includes a first trace 107, and the plurality of first electrodes 1031 are electrically connected to the first trace 107. And the first trace 107 and the plurality of first electrodes 1031 are disposed in the same layer and material. Thus, the patterns of the first electrodes 1031, the second electrodes first electrodes 1032 and the first wires 107 can be formed only by one-time composition process without adding an additional process for preparing the first wires 107, so that the preparation process can be simplified, the production cost can be saved, and the production efficiency can be improved.
The material of the first electrode 1031 and the first trace 107 may include indium tin oxide, and may also include other non-metal conductive materials, which is not limited in the present invention.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 1, a width of the first electrode 1031 in the AA 'direction is substantially the same as a width of the second electrode 1032 in the AA' direction. In an actual process, the same or different features may not be completely the same due to limitations of process conditions or other factors, and therefore, the same relationship between the features may be satisfied only by approximately satisfying the above conditions, and all of the features fall within the scope of the present invention. For example, the above-described identity may be the same as allowed within an error allowable range.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 1, the filter further includes a third trace 109; the plurality of second electrodes 1032 are electrically connected to the third wire 109. The third trace 109 and the plurality of second electrodes 1032 are disposed on the same layer and material. Thus, the patterns of the first electrodes 1031, the second electrodes 1032 and the third wires 109 can be formed only by one-time composition process without adding an additional process for preparing the third wires 109, so that the preparation process can be simplified, the production cost can be saved, and the production efficiency can be improved.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 1 and fig. 3, the filter further includes: the frame sealing adhesive 113 is disposed between the first substrate 101 and the second substrate 102, and the frame sealing adhesive 113 is disposed around the periphery of the electrode layer 103.
Taking the structure of the filter shown in fig. 3 as an example, the specific working principle of the filter is as follows:
referring to fig. 4, when the first electrode 1031 and the second electrode 1032 of the filter are not loaded with voltage, when a wide-band incident light is transmitted to the filter, the filter generates a reflected light with a characteristic wavelength λ, that is, the filter reflects the light with the wavelength λ in the wide-band incident light, and the light with other wavelengths in the wide-band incident light is transmitted through the liquid crystal material. Wherein, the characteristic wavelength λ of the light that can be reflected by the filter satisfies the following formula:
λ＝2neffL；
where λ represents the characteristic wavelength of the incident light reflected by the filter, neffRepresents an effective refractive index of a liquid crystal material in the filter, and L represents a sum of a width L ' of a gap between adjacent first and second electrodes 1031 and 1032 in the AA ' direction and a width of the first electrode 1031 in the AA ' direction.
As shown in fig. 5, when the first electrode 1031 and the second electrode 1032 of the filter are loaded with the first voltage and the second voltage, respectively, and the first voltage is not equal to the second voltage, a voltage difference is generated between the adjacent first electrode and the second electrode, the voltage difference causes liquid crystal molecules in the liquid crystal material in the filter to deflect at a certain angle θ, and further causes the effective refractive index of the liquid crystal material to change, and then the changed effective refractive index n 'of the liquid crystal material'effSatisfies the following conditions:
Figure BDA0002167159120000061
wherein, n'effRepresenting the effective refractive index, n, of the liquid crystal material after change0Refractive index, n, representing ordinary rayseRepresents the refractive index of the extraordinary ray, and θ represents the deflection angle of the liquid crystal molecules with respect to the optical axis BB'.
When the effective refractive index of the liquid crystal material changes, the characteristic wavelength of the light reflected by the filter correspondingly changes. Therefore, when a wide-band incident light beam is transmitted to the filter, the variation Δ λ of the characteristic wavelength of the light reflected by the filter satisfies:
Δλ＝2ΔneffL；
where Δ λ represents a characteristic wavelength variation of light reflected by the filter, Δ neffRepresents an amount of change in an effective refractive index of the liquid crystal material, and L represents a sum of a width L ' of a gap between the adjacent first and second electrodes 1031 and 1032 in the AA ' direction and a width of the first electrode 1031 in the AA ' direction.
In summary, when the first electrode of the filter is loaded with the first voltage and the second electrode is loaded with the second voltage, the incident light in a wide wavelength band is transmitted to the filter, and the characteristic wavelength of the light reflected by the liquid crystal material in the filter is λ ', that is, the filter can reflect the incident light with the wavelength λ'. Then, when the first electrode of the filter is loaded with the third voltage and the second electrode is loaded with the second voltage, incident light is transmitted to the filter in a wide wavelength band, and due to the change of the effective refractive index of the liquid crystal material, the characteristic wavelength of light reflected by the liquid crystal material in the filter may be changed to λ '+ Δ λ, that is, the filter may reflect incident light having a wavelength of λ' + Δ λ.
Based on the operating principle of the filter, in specific implementation, in the embodiment of the present invention, as shown in fig. 1 and fig. 3, when a first voltage is applied to the first trace 107, the same first voltage may be applied to all of the plurality of first electrodes 1031 connected to the first trace 107. A second voltage is applied to the third trace 109, and a plurality of second electrodes 1032 connected to the third trace may be applied with the same second voltage. A voltage difference is formed between one first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031, and is the same as a voltage difference formed between the other first electrode 1031 and the second electrode 1032 adjacent thereto, so that liquid crystal molecules in the liquid crystal material can be controlled to deflect by the same angle. When the liquid crystal molecules are deflected by the same angle, the effective refractive index of the liquid crystal material in the filter after change is the same value. At this time, when a beam of broadband incident light is transmitted to the filter, the filter may reflect an incident light of a characteristic wavelength corresponding to the changed effective refractive index, and further select the incident light of the characteristic wavelength corresponding to the changed effective refractive index.
Example two
Fig. 6 and 7 show schematic structural diagrams of a filter according to this embodiment, which are modified from some embodiments in the first embodiment. Only the differences between the present embodiment and the first embodiment will be described below, and the same parts will not be described herein again.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 6 and fig. 7, the filter further includes a first routing layer 108, where the first routing layer 108 includes a plurality of second routing lines 1081, and at least one first electrode 1031 is used as a first electrode group.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 7, the first wiring layer 108 is located between the first alignment layer 105 and the first substrate 101. One second wire 1081 is electrically connected to all the first electrodes 1031 in one first electrode group through a first via 1082 penetrating through the first alignment layer 105. A first voltage may be applied to each second trace 1081, so that the first electrode 1031 electrically connected to each second trace 1081 correspondingly may be applied with the first voltage, and when a second voltage is applied to the second electrode 1032, a voltage difference is formed between each first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031.
Optionally, in the filter provided in the embodiment of the present invention, when one first electrode 1031 is one first electrode group, one second trace 1081 is electrically connected to the corresponding first electrode 1031 through a first via 1082 that penetrates through the first alignment layer 105. The corresponding first voltage loaded on each second trace 1081 may be different from each other, and the first voltage loaded on each second trace 1081 is different from each other, so that the first electrode 1031 electrically connected to each second trace 1081 is loaded with the different first voltage, and when the second electrode 1032 is loaded with the second voltage, a voltage difference is formed between each first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031. When the corresponding first voltages applied to each second trace 1081 are different from each other, a voltage difference is formed between one first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031, and a voltage difference is formed between the other first electrode 1031 and the second electrode 1032 adjacent thereto is different from each other. I.e., the voltage difference formed between each first electrode 1031 and its adjacent second electrode 1032 is also different. So that the liquid crystal molecule deflection angle between each first electrode 1031 and its adjacent second electrode 1032 is also different. As can be seen from the operation principle of the filter, the effective refractive index of the filter after the liquid crystal material changes between one first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031 is different from the effective refractive index of the filter after the material changes between the other first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031. Because different effective refractive indexes correspond to reflected lights with different characteristic wavelengths, when a beam of broadband incident light is transmitted to the filter, the characteristic wavelength of the incident light reflected by the liquid crystal material between one first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031 is different from the characteristic wavelength of the incident light reflected by the liquid crystal material between the other first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031, so that the filter can reflect the incident lights with a plurality of characteristic wavelengths, and further can select the incident lights with a plurality of characteristic wavelengths from the beam of broadband incident light.
For example, the first voltage correspondingly loaded on each second trace may also be the same. The process and principle of this embodiment are similar to those of the first embodiment, and the repeated parts are not described herein again.
For example, the first voltages correspondingly loaded on part of the second traces may be different, and the first voltages correspondingly loaded on the remaining part of the second traces are the same, and the process and the principle thereof may refer to the above embodiments, and repeated parts are not described herein again.
EXAMPLE III
Fig. 8 and 9 show schematic structural diagrams of a filter according to this embodiment, which are modified from some embodiments in the second embodiment. Only the differences between the present embodiment and the second embodiment will be described below, and the descriptions of the same parts are omitted here.
Optionally, in the filter provided in the embodiment of the present invention, as shown in fig. 8 and fig. 9, when two first electrodes 1031 are a first electrode group, one second trace 1081 is electrically connected to all the first electrodes 1031 in the first electrode group through a first via 1082 penetrating through the first alignment layer 105. A first voltage may be applied to each second trace 1081, and a first voltage may be applied to the first electrode 1031 electrically connected to each second trace 1081, so that when a second voltage is applied to the second electrode 1032, a voltage difference is formed between each first electrode 1031 and the second electrode 1032 adjacent to the first electrode 1031.
As shown in fig. 8 and 9, the manner of applying a voltage on each second trace 1081 may include:
illustratively, the first voltage correspondingly loaded on each second trace 1081 may be the same. The process and principle of this embodiment are similar to those of the first embodiment, and the repeated parts are not described herein again.
For example, the first voltage applied to each second trace 1081 may be different from each other. The process and principle of this embodiment are similar to those of the second embodiment, and the repeated parts are not described herein again.
For example, the first voltages correspondingly loaded on part of the second traces 1081 may be different, and the first voltages correspondingly loaded on the remaining part of the second traces 1081 are the same. The processes and principles thereof can refer to the first embodiment and the second embodiment, and repeated details are not repeated herein.
Of course, one first electrode group may also include 3, 4 or more first electrodes 1031, which may be designed according to the actual application environment, and is not limited herein.
Example four
Fig. 10 shows a schematic structural diagram of a filter according to this embodiment, which is a modification of some embodiments in the third embodiment. Only the differences between the present embodiment and the third embodiment will be described below, and the same parts will not be described herein.
Optionally, in the filter provided in the embodiment of the invention, as shown in fig. 10, the first wire layer 108 is located between the second alignment layer 106 and the second substrate 102, and one second wire 1081 is electrically connected to all the first electrodes in one first electrode group through a second via penetrating through the second alignment layer 106. When the first wiring layer 108 is located between the second alignment layer 106 and the second substrate 102, the implementation thereof is similar to the implementation of the first wiring layer 108 located between the first alignment layer 105 and the first substrate 101, and repeated descriptions thereof are omitted here.
Optionally, in the filter provided in the embodiment of the present invention, the filter further includes a second routing layer, where the second routing layer includes a plurality of fourth routing lines; at least one second electrode is taken as a second electrode group;
the second wiring layer is positioned between the first alignment layer and the first substrate, and a fourth wiring is correspondingly and electrically connected with all the second electrodes in a second electrode group through a first via hole penetrating through the first alignment layer; or the second routing layer is positioned between the second alignment layer and the second substrate, and a fourth routing is correspondingly and electrically connected with all the second electrodes in a second electrode group through a second via hole penetrating through the second alignment layer.
In the embodiment of the present invention, the principle and the implementation effect of the second routing layer of the filter are similar to those of the first routing layer, and repeated descriptions are omitted here.
In specific implementation, in the embodiment of the present invention, a filtering apparatus is further provided, where the filtering apparatus includes the above filter. The principle of the filter device to solve the problem is similar to the aforementioned filter, so the implementation of the filter device can be referred to the implementation of the aforementioned filter, and the repeated points are not described herein again.
Based on the same inventive concept, an embodiment of the present invention further provides a method for driving the filter, which may include:
loading a first voltage on the first electrode and loading a second voltage on the second electrode so as to control the effective refractive index of the liquid crystal material to change and filter light with characteristic wavelength corresponding to the changed effective refractive index; wherein the first voltage is not equal to the second voltage;
in the method for driving the filter, a first voltage is applied to the first electrode, a second voltage is applied to the second electrode, and the first voltage is not equal to the second voltage, so that a voltage difference is formed between the first electrode and the second electrode, and liquid crystal molecules in the liquid crystal material are deflected under the action of the voltage difference, thereby changing the effective refractive index of the liquid crystal material. When broadband light is incident on the liquid crystal material, the liquid crystal material can reflect light with the characteristic wavelength corresponding to the changed effective refractive index, light with other wavelengths is continuously transmitted through the liquid crystal material, light with the characteristic wavelength corresponding to the changed effective refractive index is selected, and the filter can further achieve the effect of selecting light with specific wavelength.
The embodiment of the present invention further provides a method for manufacturing the filter, as shown in fig. 11, the method may include steps 111 to 113.
Step 111, forming an electrode layer on a first substrate; wherein the electrode layer comprises a plurality of first electrodes and a plurality of second electrodes;
step 112, forming a liquid crystal material between the adjacent first electrode and the second electrode;
and 113, forming a second substrate on the side, away from the first substrate, of the electrode layer, so as to package the box through the second substrate and the first substrate.
According to the preparation method of the filter, provided by the embodiment of the invention, the electrode layer is formed on the first substrate; wherein the electrode layer comprises a plurality of first electrodes and a plurality of second electrodes; forming a liquid crystal material between adjacent first and second electrodes; and forming a second substrate on one side of the electrode layer, which is far away from the first substrate, so as to carry out box packaging through the second substrate and the first substrate. The filter prepared by the method can realize the function of selecting the incident light with specific wavelength.
The following describes the preparation method of the filter shown in fig. 3 and 7 as an example.
EXAMPLE five
Taking the filter shown in fig. 3 as an example, the preparation method of the filter as shown in fig. 12 a-12 g may include the following steps:
(1) as shown in fig. 12a, a polyimide layer 110 is formed on a first substrate 101, wherein the first substrate 101 may be a glass substrate.
(2) As shown in fig. 12b, a transparent conductive layer 111 is formed by depositing a layer of transparent conductive material, which may be indium tin oxide, on the polyimide layer 110.
(3) As shown in fig. 12c, the transparent conductive layer 111 is etched to form the electrode layer 103 and the first trace 107 and the third trace 109; wherein the electrode layer 103 includes: a plurality of first electrodes 1031, and a plurality of second electrodes 1032.
(4) As shown in fig. 12d, the polyimide layer 110 is irradiated with an ultraviolet lamp 112 to photo-align the polyimide layer 110, forming the first alignment layer 105.
(5) As shown in fig. 12e, liquid crystal material 104 is dropped between the adjacent first and second electrodes 1031 and 1032.
(6) As shown in fig. 12f and 12g, a polyimide layer 114 is formed on the second substrate 102, and a sealant 113 is formed, wherein the sealant 113 surrounds the edge of the second substrate 102 and is located at the periphery of the electrode layer 103.
In specific implementation, in the embodiment of the present invention, the sequence of steps (1) to (5) and step (6) may be interchanged or performed simultaneously according to the actual manufacturing process flow.
(7) As shown in fig. 3, the second substrate 102 with the sealant 113 and the first substrate 101 are packaged together to form the filter shown in fig. 3.
Example six
Taking the filter shown in fig. 7 as an example, the manufacturing of the filter may include steps (1) to (7) in embodiment five: the steps similar to those in the fifth embodiment are not described herein again.
Preparing the filter shown in fig. 7 may further include: before step (1), a first wiring layer 108 is formed on the first substrate 101. The first routing layer 108 includes a plurality of second routings 1081.
In step (1), a polyimide layer is formed on the first substrate 101 on which the first wiring layer 108 is formed, and the polyimide layer is patterned to form a first via 1082 penetrating the polyimide layer.
In the step (3), the transparent conductive layer is etched to form the electrode layer 103 and the third trace 109; the electrode layer 103 includes: a plurality of first electrodes 1031, and a plurality of second electrodes 1032. The first electrode 1031 is electrically connected to the corresponding second trace 1081 in the first trace layer 108 through the first via 1082.
The filter comprises a first substrate and a second substrate which are oppositely arranged, and an electrode layer and a liquid crystal material which are positioned between the first substrate and the second substrate, wherein the electrode layer comprises a first electrode and a second electrode, and the liquid crystal material is packaged between the adjacent first electrode and the second electrode. The first electrode is loaded with a first voltage, the second electrode is loaded with a second voltage, the first voltage is not equal to the second voltage, a voltage difference is formed between the first electrode and the second electrode, liquid crystal molecules in the liquid crystal material deflect under the action of the voltage difference, and then the effective refractive index of the liquid crystal material is changed. When broadband light is incident on the liquid crystal material, the liquid crystal material can reflect light with the characteristic wavelength corresponding to the changed effective refractive index, light with other wavelengths is continuously transmitted through the liquid crystal material, light with the characteristic wavelength corresponding to the changed effective refractive index is selected, and the filter can further achieve the effect of selecting light with specific wavelength.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (11)

1. A filter, characterized in that the filter comprises: the liquid crystal display panel comprises a first substrate, a second substrate, an electrode layer and a liquid crystal material, wherein the first substrate and the second substrate are oppositely arranged, and the electrode layer and the liquid crystal material are positioned between the first substrate and the second substrate;
the electrode layer includes: a plurality of first electrodes and a plurality of second electrodes; wherein the first electrodes and the second electrodes are alternately arranged at intervals; a liquid crystal material is encapsulated between the adjacent first electrode and the second electrode; the first electrode and the second electrode extend from one side of the layer of the liquid crystal material facing the first substrate to one side of the layer of the liquid crystal material facing the second substrate;
the driving method of the filter includes: loading a first voltage on the first electrode and loading a second voltage on the second electrode to control the effective refractive index of the liquid crystal material to change and filter light with characteristic wavelength corresponding to the changed effective refractive index; wherein the first voltage is not equal to the second voltage.
2. The filter of claim 1, further comprising: the first alignment layer is located between the first substrate and the electrode layer, and the second alignment layer is located between the second substrate and the electrode layer.
3. The filter of claim 2, further comprising a first trace; the first electrodes are electrically connected with the first wires.
4. The filter of claim 3, wherein the first trace and the plurality of first electrodes are disposed on the same layer and the same material.
5. The filter of claim 2, further comprising: the first routing layer comprises a plurality of second routing lines; at least one first electrode is taken as a first electrode group;
the first routing layer is positioned between the first alignment layer and the first substrate, and one second routing is correspondingly and electrically connected with all the first electrodes in one first electrode group through a first via hole penetrating through the first alignment layer; alternatively, the first and second electrodes may be,
the first routing layer is located between the second alignment layer and the second substrate, and one second routing is correspondingly and electrically connected with all the first electrodes in one first electrode group through a second via hole penetrating through the second alignment layer.
6. The filter according to any of claims 1-5, wherein the filter further comprises a third trace; the second electrodes are electrically connected with the third wires.
7. The filter according to claim 6, wherein the third trace and the plurality of second electrodes are disposed on the same layer and the same material.
8. The filter of any one of claims 1-5, further comprising: the second routing layer comprises a plurality of fourth routing lines; at least one second electrode is taken as a second electrode group;
the second routing layer is positioned between the first alignment layer and the first substrate, and one fourth routing is correspondingly and electrically connected with all the second electrodes in one second electrode group through a first via hole penetrating through the first alignment layer; alternatively, the first and second electrodes may be,
the second routing layer is located between the second alignment layer and the second substrate, and one fourth routing is correspondingly and electrically connected with all the second electrodes in one second electrode group through a second via hole penetrating through the second alignment layer.
9. A filtering arrangement, characterized in that it comprises a filter according to any one of claims 1-8.
10. A driving method of a filter according to any one of claims 1 to 8, comprising:
loading a first voltage on the first electrode and loading a second voltage on the second electrode to control the effective refractive index of the liquid crystal material to change and filter light with characteristic wavelength corresponding to the changed effective refractive index; wherein the first voltage is not equal to the second voltage.
11. A method for manufacturing a filter according to any one of claims 1 to 8, comprising:
forming the electrode layer on the first substrate; wherein the electrode layer comprises the plurality of first electrodes and the plurality of second electrodes;
forming the liquid crystal material between adjacent first and second electrodes;
and forming a second substrate on one side of the electrode layer, which is far away from the first substrate, so as to carry out box packaging through the second substrate and the first substrate.
CN201910750962.1A 2019-08-14 2019-08-14 Filter, filtering device, driving method of filter and preparation method of driving method Active CN110441936B (en)

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