CN104408214A - 3D manufacturing method for an electrode of an in-planeswitching blue phase liquid crystal display device - Google Patents
3D manufacturing method for an electrode of an in-planeswitching blue phase liquid crystal display device Download PDFInfo
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Abstract
The invention relates to a 3D manufacturing method for an electrode of an in-plane switching blue phase liquid crystal display device. The electrode may go deep into the blue phase liquid crystal to reduce a driving voltage. By way of layered manufacturing, the method comprises the steps: (1) designing a three-dimensional digital model; (2) performing an approximating process on the three-dimensional digital model to eliminate an irregular free surface, and converting the model into an STL format that can be accepted and operated by a 3D printer; (3) hierarchically slicing the model into a series of two-dimensional cross-sectional graphs; (4) preparing electrode printing paste; (5) printing the electrode by a 3D printing apparatus, and performing 3D molding on materials by curing or hardening; (6) performing a subsequent process on the printed electrode to form a desired electrode of the in-plane switching blue phase liquid crystal display device. The 3D manufacturing method, with great manufacturing flexibility, effectively reduces the complexity in and the cost of manufacturing the electrode of the in-plane switching blue phase liquid crystal display device.
Description
Technical field
The present invention relates to technical field of flat panel display, particularly relate to a kind of 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode.
Background technology
Compared with common liquid crystals, following four advantages of blue phase liquid crystal: (1) does not need alignment film, when being applied to display technique, not only reducing process complexity and also reduces cost; (2) response time is in sub-millisecond rank, is applied in display technique, can weaken the dynamic image caused due to the response time in traditional liquid crystal display fuzzy, and likely realize sequential display, without the need to using color filter, both reducing process complexity and cost, having improved transmittance again; (3) the black state of blue phase liquid crystal display is optical isotropy, and therefore the visible angle of blue phase is not only wider but also be symmetrical, therefore perhaps can omit the optical compensation films used in common liquid crystals display; (4) when liquid crystal cell thick more than 2-3um time, the thickness of transmitance and the liquid crystal layer of blue phase liquid crystal display has nothing to do, in the manufacture of large scale flat pannel display, the uneven difference that can not cause transmitance of liquid crystal molecule thickness distribution.Therefore, blue phase liquid crystal display is considered to become the main display mode of liquid crystal display of future generation.Wherein coplanar conversion blue phase liquid crystal display visible angle receives greatly the concern of industrial community, but, the driving voltage of coplanar conversion blue phase liquid crystal display is too high, now widely used thin film transistor (TFT) (TFT) cannot be used to drive, have a strong impact on its industrialization process.Researchist develops large Kerr constanr blue phase liquid crystal on the one hand; Propose new electrode structure on the other hand, comprise projection electrode, fold electrode, electrode wall etc. (scientific paper can delivered with reference to the clever seminar of University of Central Florida Wu Shi), reduce its driving voltage.The feature of these structure electrodes has accurate three-dimensional structure, makes electrode to be deep into liquid crystal, thus reduce driving voltage.This accurate three-dimensional structure electrode adds the complexity of manufacture craft, and electrode parameter often needs according to parameters such as concrete display sizes and changes, once parameter change, the manufacture crafts such as traditional photoetching, printing, plated film need be groped again, plenty of time, human and material resources, financial resources need be spent, greatly increase display cost.
3D manufacturing technology is the mode that a kind of lamination increases material manufacture, by by a virtual 3d model after layering, material is successively superposed to the technology forming entity, be specially adapted to complex three-dimensional structural objects, and without the need to machining or any mould, new-product development cost can be reduced at double, be a kind of manufacturing technology of maturation and rise gradually in recent years, and developed into the ability with challenge mass production method.
Summary of the invention
In view of this, the object of the invention is the shortcoming large for coplanar conversion blue phase liquid crystal device novel electrode structure traditional manufacturing technique difficulty, cost is high, a kind of 3D manufacture method of coplanar conversion blue phase liquid crystal device electrode is provided.
A kind of 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode, it is characterized in that, described electrode can be deep in blue phase liquid crystal, reduces driving voltage, adopt the mode of layered manufacturing to make the electrode of coplanar conversion blue phase liquid crystal display part, carry out as follows:
S1: design generates the three-dimensional digital model of coplanar conversion blue phase liquid crystal display part electrode;
S2: carry out approximate processing to three-dimensional digital model, eliminates irregular free form surface, and three-dimensional model is converted into the STL form of the acceptance of 3 D-printing function and operation;
S3: precision carries out hierarchy slicing to the three-dimensional digital model after process needed for electrode, is converted into a series of two-dimensional section figure;
S4: prepare electrode and print slurry;
S5: utilize 3D printing device to print electrode, adopts the mode of solidification or sclerosis to carry out 3D to the material of electrode shaping;
S6: the electrode of printing shaping is carried out subsequent treatment, forms the electrode of required coplanar conversion blue phase liquid crystal display part.
The three-dimensional digital model method that design generates described electrode comprises Computerized three-dimensional modeling, stereoscanning, stereo camera shooting; Described stereoscanning comprises optical scanning imaging, computerize Tomography, magnetic resonance imaging.
Described 3D is shaping comprises solid shaping, the selective laser sintering of the cubic light of photochromics, it is shaping to melt extrude, three-dimensional spray-painting prints.
Described electrode material comprises one or more of metal, alloy, tin indium oxide (ITO), aluminium-doped zinc oxide (AZO), Graphene or organic conductive material.
Described electrode structure comprises projection electrode, fold electrode or electrode wall.
The width range of described projection electrode be hundreds of nanometer to hundreds of micron, altitude range be hundreds of nanometer to tens microns, electrode separation scope be several microns to hundreds of micron.
The side cross-sectional shape of described electrode comprises: square, rectangle, trapezoidal, triangle, semicircle, arc; Top view cross section shape comprises vertical bar type, waveform, Zigzag shape, notch cuttype.
Described projection electrode is the comparatively thick electrode of electrode material manufacture of the same race, or adopts inkjet printing electrode material to be made on the other materials surface with shape the same as electrode.
Remarkable advantage of the present invention is: adopt the accurate three-dimensional coplanar conversion blue phase liquid crystal display part electrode of lamination 3D manufacture preparation, electrode is better deep in blue phase liquid crystal, and reduce driving voltage, manufacturing process is without the need to die sinking, and technique is simple, cost is low.
For making object of the present invention, technical scheme and advantage clearly understand, below by specific embodiment and relevant drawings, the present invention will be described in further detail.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the present invention's coplanar conversion blue phase liquid crystal display part 3D method for making.
Fig. 2 forms coplanar conversion blue phase liquid crystal display part structural representation for adopting the thicker projection electrode of same material manufacture.
Fig. 3 forms coplanar conversion blue phase liquid crystal display part structural representation for adopting at other materials surface manufacture projection electrode.
Fig. 4 forms coplanar conversion blue phase liquid crystal display part structural representation for adopting electrode wall.
Fig. 5 is the side cross-sectional schematic shapes of several projection electrode.
Fig. 6 is that the 3D of projection electrode in the embodiment of the present invention one manufactures schematic diagram.
Fig. 7 is that the 3D of projection electrode in the embodiment of the present invention two manufactures schematic diagram.
In accompanying drawing, main element description of symbols is as follows:
01---upper light polarizing film; 02---lower light polarizing film; 03---glass substrate; 04---blue phase liquid crystal; 05---electric field line; 06---pixel electrode; 07---public electrode; 08---the base material of electrode shape is provided; 09---the section (lamination) that electrode prints; 10---3D printer head; 061---square electrode cross section; 062---rectangular electrodes cross section; 063---trapezoidal electrode sections; 064---triangular-shaped electrodes cross section; 065---arch electrode sections; 066---semicircular electrode cross section.
Embodiment
As in Figure 2-4, the invention provides a kind of coplanar conversion blue phase liquid crystal device electrode, described electrode can be deep in blue phase liquid crystal, reduces driving voltage, adopt the mode of layered manufacturing to make the electrode of coplanar conversion blue phase liquid crystal display part, carry out as follows:
S1: design generates the three-dimensional digital model of coplanar conversion blue phase liquid crystal display part electrode;
S2: carry out approximate processing to three-dimensional digital model, eliminates irregular free form surface, and three-dimensional model is converted into the STL form of the acceptance of 3 D-printing function and operation;
S3: precision carries out hierarchy slicing to the three-dimensional digital model after process needed for electrode, is converted into a series of two-dimensional section figure;
S4: prepare electrode marking ink;
S5: utilize 3D printing device to print electrode, adopts the mode of solidification or sclerosis to carry out 3D to material shaping;
S6: the electrode of printing shaping is carried out subsequent treatment, forms the electrode of required coplanar conversion blue phase liquid crystal display part.
The three-dimensional digital model method that design generates described electrode comprises Computerized three-dimensional modeling, stereoscanning, stereo camera shooting; Described stereoscanning comprises optical scanning, CT(Computer Tomography), MRI(Magnetic Resonance Imaging).
Described 3D manufactures solid shaping, the selective laser sintering of the cubic light comprising photochromics, it is shaping to melt extrude, three-dimensional spray-painting prints.
Described electrode material comprises metal, alloy, tin indium oxide (ITO), aluminium-doped zinc oxide (AZO), Graphene, organic conductive material.
Described electrode structure comprises projection electrode, fold electrode, electrode wall.
The width range of described projection electrode be hundreds of nanometer to hundreds of micron, altitude range be hundreds of nanometer to tens microns, electrode separation scope be several microns to hundreds of micron.
As shown in Figure 5, the side cross-sectional shape of described electrode comprises: square, rectangle, trapezoidal, triangle, semicircle, arc; Top view cross section shape comprises vertical bar type, waveform, Zigzag shape, notch cuttype.
Described projection electrode can be the comparatively thick electrode of electrode material manufacture of the same race, also can be to adopt inkjet printing electrode material to be made on the other materials surface with shape the same as electrode.
In the drawings, in order to represent the clear thickness being exaggerated layer and region, but should not be considered to as schematic diagram the proportionate relationship strictly reflecting physical dimension.Reference diagram is the schematic diagram of idealized embodiments of the present invention, and illustrated embodiment should not be considered to the given shape being only limitted to the region shown in figure, but comprises obtained shape (such as manufacturing the deviation caused).All represent with rectangle in the present embodiment, the expression in figure is schematic, but this should not be considered to limit the scope of the invention.
In order to allow those skilled in the art better understand the present invention, introduce the concrete preparation method of coplanar conversion blue phase liquid crystal device electrode below by embodiment.
Embodiment one
As shown in Figure 6, the present embodiment is work as the thick electrode that described projection electrode is electrode material manufacture of the same race, and its concrete scheme comprises the following steps:
s1:design generates the three-dimensional digital model of coplanar conversion blue phase liquid crystal display part electrode;
The three-dimensional model of electrode, Three-dimensional CAD Software (as AUTO CAD, UG, Pro/Engineer, SolidWorks) can be adopted to set up, also can adopt CT(Computer Tomography), MRI(Magnetic Resonance Imaging) etc. mode sample workpiece is scanned, be then converted to three-dimensional model.Preferably, the present embodiment adopts AUTO CAD software to carry out the foundation of three-dimensional model, and preferably, the sectional view of the present embodiment design electrode is trapezoidal.Electrode bottom width is 4 microns, and upper base width is 2 microns, is highly 2 microns, and the spacing of electrode and electrode is 4 microns, and pixel electrode is consistent with public electrode shape and size.
s2:approximate processing is carried out to three-dimensional digital model, eliminates irregular free form surface, and three-dimensional model is converted into the STL form of the acceptance of 3 D-printing function and operation;
Before electrode forming, adopt STL to format processing mode, approximate processing is carried out to cad model, eliminates some irregular free form surfaces.Concrete operations are: construct a series of little triangle to approach free form surface, wherein leg-of-mutton size, has the precision required by workpiece to determine, accuracy requirement is higher, and triangle is less.In the triangle constructed, each little triangle projective planum must with each adjacent little triangle projective planum totally two summits, and ensure, on all surface of three-dimensional model, little triangle projective planum must be covered with, any omission must not be had.Finally, three-dimensional model is converted into the STL form that 3 D-printing function accepts and operates.
s3:needed for electrode, precision carries out hierarchy slicing to the three-dimensional digital model after process, is converted into a series of two-dimensional section figure;
Utilize three-dimensional printer that the STL form three-dimensional model of workpiece is converted into a series of two-dimensional section figure, namely carry out hierarchy slicing to cad model, the vertical range between contiguous slices layer is shaping floor height, and floor height is less, precision and the surface quality of Forming Workpiece are better, but curring time is longer.According to precision and the time-write interval of 3D printer, preferably, the present embodiment gets floor height is 0.1mm.Three-dimensional digital model is separated into a series of two-dimentional arc section synusia in order along Z-direction, according to every layer of profile information, carries out process planning, Choice and process parameter, automatically generate the NC instruction of 3D printing device.
s4:prepare electrode marking ink;
Described electrode material comprises metal, alloy, tin indium oxide (ITO), aluminium-doped zinc oxide (AZO), Graphene, organic conductive material.Described 3D manufactures solid shaping, the selective laser sintering of the cubic light comprising photochromics, it is shaping to melt extrude, three-dimensional spray-painting prints.Preferably, the present embodiment adopts three-dimensional spray-painting Method of printing to manufacture electrode, and electrode material is the silver electrode that silver nano-grain is formed.
First, silver nano-grain 10g particle diameter being less than 50 nanometers is scattered in 200ml ethanolic solution, ultrasonic 1 hour; Then the surface tension that 0.01g surface tension agent (GSK511) regulates solution is added; Then the viscosity that 2g terpinol regulates ink is added; After last Homogeneous phase mixing, filter through 0.2 micron membrane filter and form the present embodiment for printing the silver nano-grain ink of electrode.
s5:utilize 3D printing device to print electrode, adopt the mode of solidification or sclerosis to carry out 3D to material shaping;
The feed cavity of 3D printing device put into by the silver nano-grain ink prepared by step S5, and 3D printing device will manufacture a series of synusia according to three-dimensional digital model and automatically they be piled up, and form required electrode.Preferably, the present embodiment adopts the 3D printing device with array shower nozzle, and the spacing arranging shower nozzle equals the spacing of required electrode, can once print many strip electrodes, improves print speed.
s6:the electrode of printing shaping is carried out subsequent treatment, forms the electrode of required coplanar conversion blue phase liquid crystal display part.
The projection electrode made by step S6 is placed in 60 DEG C of baking ovens dry 1 hour, and being then positioned over 200 DEG C and drying close annealing 2 hours, is that silver nano-grain is converted into high-quality silver electrode.
So far, the 3D manufacture method of a kind of coplanar conversion blue phase liquid crystal display part electrode of the present invention completes.
Embodiment two
As shown in Figure 7, the present embodiment is that its concrete scheme comprises the following steps when described projection electrode is the projection electrode that coating electrode material is formed in the substrate of not same material:
s1:design generates the three-dimensional digital model of coplanar conversion blue phase liquid crystal display part electrode;
The three-dimensional model of electrode basement and electrode, Three-dimensional CAD Software (as AUTO CAD, UG, Pro/Engineer, SolidWorks) can be adopted to set up, also can adopt CT(Computer Tomography), MRI(Magnetic Resonance Imaging) etc. mode sample workpiece is scanned, be then converted to three-dimensional model.Preferably, the present embodiment adopts AUTO CAD software to carry out the foundation of three-dimensional model, and preferably, the sectional view of the present embodiment design electrode is trapezoidal.Electrode basement bottom width is 4 microns, and upper base width is 2 microns, is highly 2 microns, and the spacing of electrode and electrode is 4 microns, and pixel electrode is consistent with public electrode shape and size.The electrode layers thickness of spraying is 200 nanometers.
s2:approximate processing is carried out to three-dimensional digital model, eliminates irregular free form surface, and three-dimensional model is converted into the STL form of the acceptance of 3 D-printing function and operation;
Before printing, adopt STL to format processing mode, approximate processing is carried out to cad model, eliminates some irregular free form surfaces.Concrete operations are: construct a series of little triangle to approach free form surface, wherein leg-of-mutton size, has the precision required by workpiece to determine, accuracy requirement is higher, and triangle is less.In the triangle constructed, each little triangle projective planum must with each adjacent little triangle projective planum totally two summits, and ensure, on all surface of three-dimensional model, little triangle projective planum must be covered with, any omission must not be had.Finally, three-dimensional model is converted into the STL form that 3 D-printing function accepts and operates.
s3:according to required precision, hierarchy slicing is carried out to the three-dimensional digital model after process, be converted into a series of two-dimensional section figure;
Utilize three-dimensional printer that the STL form three-dimensional model of workpiece is converted into a series of two-dimensional section figure, namely carry out hierarchy slicing to cad model, the vertical range between contiguous slices layer is shaping floor height, and floor height is less, precision and the surface quality of Forming Workpiece are better, but curring time is longer.According to precision and the time-write interval of 3D printer, preferably, when the present embodiment prints electrode base materials, getting floor height is 0.1mm, when printing electrode material, gets floor height 0.05mm.Three-dimensional digital model is separated into a series of two-dimentional arc section synusia in order along Z-direction, according to every layer of profile information, carries out process planning, Choice and process parameter, automatically generate the NC instruction of 3D printing device.
s4:prepare electrode marking ink;
Described electrode material comprises metal, alloy, tin indium oxide (ITO), aluminium-doped zinc oxide (AZO), Graphene, organic conductive material.Described electrode base materials comprises polymeric material, glass material etc.Described 3D manufactures solid shaping, the selective laser sintering of the cubic light comprising photochromics, it is shaping to melt extrude, three-dimensional spray-painting prints.Preferably, the present embodiment adopts the solid forming method printed photosensitive resin of cubic light; Adopt three-dimensional spray-painting Method of printing to manufacture electrode, electrode material is the Graphene electrodes that Graphene ink is formed.
Photosensitive resin can select ready-made commodity, and preferably, the present embodiment selects the transparent photosensitive resin of WBSLA2820.Graphene ink-manufacturing method is as follows: first, and 5g graphite flake is put into 100ml ethyl cellulose solution, and is placed in ultrasonic device ultrasonic 3 hours, and ultrasonic power is 100W, and frequency is 40KHz; Then be placed in supercentrifuge, under 7500rpm rotating speed centrifugal 10 minutes first time, take out the graphite flake do not reacted completely; Second time under 7500rpm rotating speed centrifugal 5 hours, takes out solvent wherein, leaves the graphene solution of high concentration, i.e. Graphene ink.
s5:utilize 3D printing device to print electrode, adopt the mode of solidification or sclerosis to carry out 3D to material shaping;
First, according to the three-dimensional digital model of electrode basement shape, arranging print temperature is 260 DEG C, and sweep velocity is 5m/s, prints electrode basement.
Then, the feed cavity of 3D printing device put into by the Graphene ink prepared by step S5, and 3D printing device will manufacture a series of synusia according to three-dimensional digital model and automatically they be piled up, and form required electrode.
s6:the electrode of printing shaping is carried out subsequent treatment, forms the electrode of required coplanar conversion blue phase liquid crystal display part.
The projection electrode made by step S6 is placed in 60 DEG C of baking ovens and within dry 1 hour, forms required Graphene electrodes.
So far, the 3D manufacture method of a kind of coplanar conversion blue phase liquid crystal display part electrode of the present invention completes.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a 3D manufacture method for coplanar conversion blue phase liquid crystal display part electrode, is characterized in that, carry out as follows:
S1: design generates the three-dimensional digital model of coplanar conversion blue phase liquid crystal display part electrode;
S2: carry out approximate processing to three-dimensional digital model, eliminates irregular free form surface, and three-dimensional model is converted into the STL form of the acceptance of 3 D-printing function and operation;
S3: precision carries out hierarchy slicing to the three-dimensional digital model after process needed for electrode, is converted into a series of two-dimensional section figure;
S4: prepare electrode marking ink;
S5: utilize 3D printing device to print electrode, adopts the mode of solidification or sclerosis to carry out 3D to the material of electrode shaping;
S6: the electrode of printing shaping is carried out subsequent treatment, forms the electrode of required coplanar conversion blue phase liquid crystal display part.
2. the 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode according to claim 1, is characterized in that: the three-dimensional digital model method that design generates described electrode comprises Computerized three-dimensional modeling, stereoscanning, stereo camera shooting; Described stereoscanning comprises optical scanning imaging, computerize Tomography, magnetic resonance imaging.
3. the 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode according to claim 1, is characterized in that: described 3D is shaping comprises solid shaping, the selective laser sintering of the cubic light of photochromics, it is shaping to melt extrude, three-dimensional spray-painting prints.
4. the 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode according to claim 1, is characterized in that: the material of described electrode comprises one or more of metal, alloy, tin indium oxide, aluminium-doped zinc oxide, Graphene or organic conductive material.
5. the 3D manufacture method of coplanar conversion blue phase liquid crystal display part electrode according to claim 1, is characterized in that: the structure of described electrode comprises projection electrode, electrode wall or fold electrode.
6. coplanar conversion blue phase liquid crystal display part electrode structure according to claim 5, it is characterized in that: the width range of described projection electrode is that hundreds of nanometer is to hundreds of micron, altitude range be hundreds of nanometer to tens microns, electrode separation scope be several microns to hundreds of micron.
7. coplanar conversion blue phase liquid crystal display part electrode structure according to claim 5, is characterized in that: the side cross-sectional shape of described projection electrode comprises: square, rectangle, trapezoidal, triangle, semicircle, arc; Top view cross section shape comprises vertical bar type, waveform, Zigzag shape, notch cuttype.
8. coplanar conversion blue phase liquid crystal display part electrode structure according to claim 5, it is characterized in that: described projection electrode is the thick electrode of electrode material manufacture of the same race, or adopt inkjet printing electrode material to be made on the other materials surface with shape the same as electrode.
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