CN103246101B - A kind of flexible reflection type cholesteric liquid crystal display and preparation method thereof - Google Patents
A kind of flexible reflection type cholesteric liquid crystal display and preparation method thereof Download PDFInfo
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- CN103246101B CN103246101B CN201310182669.2A CN201310182669A CN103246101B CN 103246101 B CN103246101 B CN 103246101B CN 201310182669 A CN201310182669 A CN 201310182669A CN 103246101 B CN103246101 B CN 103246101B
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Abstract
The invention belongs to a kind of flexible display technologies field, be specially a kind of flexible reflection type cholesteric liquid crystal display and preparation method thereof.The inventive method comprises: determine to control the condition that cholesteric liquid crystal pitch forms target redness, target green, target blue wavelength; Ground floor is coated with conductive layer on flexible substrates, the second layer forms at least one pixel that reflection Red liquid crystal, reflection green liquid crystal and reflection blue liquid crystal form jointly, and the part of reflection Red, green, blue liquid crystal is specified portions, and spacedly to each other not interfere with each other.The described cholesteric liquid crystal reflection blue with target blue wavelength pitch, has the cholesteric liquid crystal reflection green of target green wavelength pitch, has the cholesteric liquid crystal reflection Red of target red wavelength pitch.Spraying method is utilized liquid crystal molecule to be fixed on the appointed area of flexible base, board.The present invention's application is easier, and can enhance productivity, and cuts down finished cost.
Description
Technical field
The invention belongs to a kind of flexible display technologies field, be specifically related to a kind of flexible reflection type cholesteric liquid crystal display and preparation method thereof.
Background technology
The application of current LCD screen is the situation of develop rapidly, application on display is throughout the every aspect of people's life, the medium-and-large-sized display screen from computer, mobile phone to square, arrive the screen etc. of domestic TV, in-car TV, auto navigation again, the development of liquid crystal is in irresistible mighty torrent, its function is also more and more perfect, and its range of application field is also constantly being widened.Flexible liquid crystal screen is one of them direction.
Current flexible screen application is few, though existing screen clear principle, there is bending curvature less, repeatedly bend inefficacy in practical application, and liquid crystal such as within it easily to flow at the shortcoming.
In the industrial processes realizing application due to traditional three layers of display need by red, green, blue three primary colors three are stacked adds, add manufacture difficulty and Production Time, reduce production efficiency, simultaneously various material and cost of labor also higher.
For above situation, the more simple flexible reflection type cholesteric liquid crystal display of a kind of principle is just arisen at the historic moment, and it is applicable to the requirement of era development, easy, spry and light, is easy to produce, manufacture.One deck achieves colorize more make to which raises production efficiency, saved production cost, more feasible in actual production with application.
Flexible reflection type cholesteric liquid crystal mainly applies cholesteric liquid crystal and is only reflected the light of special wavelength according to himself pitch, and the light transmissive feature of other wavelength carries out the selection of color, can control again the gray scale of arbitrary primary colors of three kinds of primary colors due to the distinctive bistable characteristic of cholesteric liquid crystal, thus it is no to make it can not put in displaying principle.In making, the present invention utilizes thermochromatic effect and the electrooptical effect of cholesteric liquid crystal, completes the making of individual layer pixel cell.
Summary of the invention
The object of the present invention is to provide a kind of application easy, production efficiency is high, and processing cost is low, applies easy flexible reflection type cholesteric liquid crystal display and preparation method thereof.
Same liquid crystal is injected into by nozzle in the grid of formation in advance by the present invention, then by applying different wave, frequency, the voltage of action time, the control being aided with temperature produce can reflection Red, green, blue three kinds of colors cholesteric liquid crystal, thus complete Red Green Blue is placed in one deck achieves full-color.Make it easier in application, improve production efficiency, reduce processing cost.
The preparation method of flexible reflection type cholesteric liquid crystal display provided by the invention, concrete steps are:
(1) on ground floor flexible base, board, matched conductive material is plated with its elastic modulus, as electrode; Above conductive material, utilize nozzle to eject the curing materials that can form liquid crystal circummure, utilize ultraviolet light to be fixed afterwards, form the grid can separating reflection Red, green, blue liquid crystal molecule;
The trellised shape controlling of above-mentioned shape is square;
After above-mentioned process, obtain predetermined splendid attire reflection Red, green, blue grid.
(2) in specific grid, the liquid crystal of given amount and the potpourri of polymer monomer is injected by shower nozzle.
(3) second layer flexible base, board with electrode is passed through the top of solidification glue bond to above-mentioned grid enclosure wall, and do encapsulation process, form the sealed chamber of cholesteric liquid crystal molecules and polymer monomer potpourri one by one.
(4) can the cholesteryl liquid crystal of reflection Red and the two poles of the earth on the flexible base, board of the grid both sides of polymer monomer apply the voltage corresponding with the red pitch of requirement and temperature (as applied continually varying square wave or the sawtooth wave of 0-500HZ to for being formed, the continually varying voltage of 0-200v, add-20 DEG C-250 DEG C continually varying temperature), predetermined red pitch can be obtained.Concrete example is as the change voltage that successively decreases to certain liquid crystal applying 40v-25v, the temperature simultaneously applying 90 DEG C at applying voltage controls, action time was 2 seconds, liquid crystal pitch can become 701.88nm from 575.31nm, and by the liquid crystal of wavelength any between the temperature between control limit point and voltage Formation period.Being formed in this specific region can the cholesteric liquid crystal molecule of reflection Red, then irradiates with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In above-mentioned steps, during by set UV-irradiation, utilize and hide every tabula rasa the part not needing to irradiate, only irradiate that be formed can the grid at cholesteric liquid crystal molecules place of reflection Red, namely complete the fixing of the pitch of the cholesteric liquid crystal molecules of reflection Red.
(5) can the cholesteryl liquid crystal of reflection green and the electrode on the flexible base, board of the grid both sides of polymer monomer apply the voltage corresponding with the green pitch required and temperature (as applied continually varying sine wave or the cosine wave (CW) of 0-500HZ to for being formed, the continually varying voltage of 0-200v, add the continually varying temperature of-20 DEG C-250 DEG C), predetermined green pitch can be obtained.Concrete example is as applied 10v-20v incremental variations voltage to certain liquid crystal, the temperature simultaneously applying 70 DEG C at applying voltage controls, action time was 2 seconds, liquid crystal pitch can become 626.25nm from 519.11nm, and by the liquid crystal of wavelength any between the temperature between control limit point and voltage Formation period.Being formed in this specific region can the cholesteric liquid crystal molecule of reflection green.Then irradiate with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In above-mentioned steps, only UV-irradiation is carried out to the cholesteric liquid crystal molecules region being both shaped as reflection green, form reticulate texture by the reaction of polymer monomer, fix the pitch of the cholesteric liquid crystal molecules in this partial grid; The shadow shield of other certain applications given shapes gives covering of light.
(6) can the cholesteryl liquid crystal of reflection blue and the electrode on the flexible base, board of the grid both sides of polymer monomer apply the voltage corresponding with the blue pitch of requirement and temperature (as applied continually varying square wave or the sine wave of 0-500HZ to for being formed, the continually varying voltage of 0-200v, add-20 DEG C-250 DEG C continually varying temperature), predetermined blue pitch can be obtained.As applied 10v-25v incremental variations voltage to certain liquid crystal, executing the alive temperature control simultaneously applying 70 DEG C to 90 DEG C, the time controlling liquid crystal pitch size was 2 seconds, liquid crystal pitch can become 530.15nm from 435.00nm, and by the liquid crystal of wavelength any between the temperature between control limit point and voltage Formation period.Being formed in this specific region can the cholesteric liquid crystal molecule of blue reflected colour.Then irradiate with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In above-mentioned steps, only UV-irradiation is carried out to the cholesteric liquid crystal molecules region being both shaped as reflection blue, form reticulate texture by the reaction of polymer monomer, fix the pitch of the cholesteric liquid crystal molecules in this partial grid; The shadow shield of other certain applications given shapes gives covering of light.
In above-mentioned three steps, the initial pitch 519.11nm of liquid crystal, 575.31nm, 435.00nm be the initial pitch of same be 435.00nm liquid crystal according to summary of the invention step (6), the method in summary of the invention step (5) obtains.
In the present invention, voltage is applied in the conductive layer respective electrode of upper and lower flexible base, board; Because flexible base, board exists certain heat conductivility, so when applying temperature, be put on the center of corresponding grid in flexible base, board direction vertical projection, to reduce the impact of thermal diffusion for liquid crystal molecule pitch in other grid.
In the present invention, described flexible base, board can select the flexible materials such as PET, PEN.Flexible base, board is the material of high temperature resistant at least 300 degrees Celsius.And the deformation of the display effect that can not have an impact in process.
In the present invention, described in be made into screen after execute flexibility that alive medium (i.e. electrode) is a kind of conduction or pliability rigid material relatively preferably.The flexibility of this conduction or the good rigid material of pliability can be ITO or other metal oxides, also can be any flexibility and hard conductive material that elastic modulus is close with flexible base, board.
Flexible reflection type cholesteric liquid crystal display prepared by the present invention, its structure as shown in Figure 8.Its structure is from top to bottom: upper strata flexible base, board 4, upper electrode layer 6, liquid crystal layer 8, lower electrode layer 9, lower floor's flexible base, board 10; Upper electrode layer 6 there is top electrode, lower electrode layer 9 has bottom electrode; Liquid crystal layer 8 is sealed between upper electrode layer 6 and lower electrode layer 9.
Its making step is:
First lower floor's flexible base, board 10 and lower electrode layer 9 are not limited in other glue classes such as UV glue with such as UV glue to be bonded together.
Use liquid crystal nozzle, carry out the spraying of liquid crystal layer, be certainly not limited only to said nozzle, coating of other liquid crystal layers completed by similar fashion.
The spraying of above-mentioned liquid crystal layer comprises the spraying of grid and the modulation of inner liquid crystal thereof of the flowing of restriction liquid crystal.
Upper electrode layer 6 is bonded on liquid crystal layer 8 by UV glue or other similar glue classes.And ensure upper contraposition between flexible base, board and liquid crystal grid.
Upper flexible base, board 4 is tired out by UV glue or other similar glue and is bonded on upper electrode layer 6.
Accompanying drawing explanation
Fig. 1 is the shape of integrated nozzle.
Fig. 2 is the composition of one of them injection-tube of special nozzle after amplifying.
Fig. 3 is the position that nozzle is corresponding with liquid crystal layer, the grid distribution on liquid crystal layer.In figure, a represents voltage this element being applied to the third hybrid waveform, frequency, action time, the third temperature and action time, makes the pitch of liquid crystal in it reach pre-provisioning request, and being formed can the cholesteric liquid crystal molecule of reflection blue.
Fig. 4 is the blue primaries module formed on screen after processing.
Fig. 5 is the green of a pixel, the module of blue two primary colors on the rear screen of processing.
Fig. 6 is a pixel of the flexible reflection type cholesteric liquid crystal display of being made by certain mode.
Fig. 7 is complete liquid crystal layer.Comprising the grid formed after processing, and inside has completed the modulation of cholesteric liquid crystal of reflection Red, green, blue fixed pitch.
Fig. 8 is the concrete composition of flexible reflection type cholesteric liquid crystal display.
Number in the figure: the 1 entity i.e. barreled structure of this nozzle representing nozzle, 2 represent the part that nozzle sprays liquid crystal, and 3 represent nozzle sprays uncured wall material.4 represent upper strata flexible base, board, and 5 represent upper electrode, and 6 represent upper electrode layer, and 7 encapsulants representing liquid crystal layer outside, 8 represent liquid crystal layer, and 9 represent lower electrode layer, and 10 represent lower floor's flexible base, board.
Embodiment
In order to make object of the present invention, process, technology path etc. more clear, accompanying drawing will be coordinated to give concrete anatomy by following examples, the present embodiment just reacts originality of the present invention from partial routine, is not limited the dirigibility that this invention is overall.
As shown in Figure 1, for can reflection Red, green, blue cholesteryl liquid crystal be realized by this device.
Fig. 1 is the entirety of nozzle, Fig. 2 shows the concrete composition of one of them square shaped cells, Fig. 2 is cut-open view, in figure, the 1 entity i.e. barreled structure of this nozzle representing nozzle, the material that the material selection transparency of nozzle is higher, 2 represent the part that nozzle sprays liquid crystal, and 3 represent nozzle sprays uncured wall material.
In Fig. 2, a part of order of work of nozzle is as follows:
Step 1, nozzle-integratedly contacts completely with electrode, the overflow of liquid during to prevent hydrojet after a while.
Step 2, nozzle sprays uncured wall material 3.
Step 3, ultraviolet light is irradiated in outside by the nozzle that transparency is higher, and solidification wall material, forms grid separate one by one.
Step 4, the part 2 that nozzle sprays liquid crystal works, and sprays the potpourri of liquid crystal and polymer monomer.
Step 5 as shown in Figure 3, is 50v by applying peak-to-peak value, frequency is the square wave of 100HZ, is executing the alive temperature control simultaneously applying 80 DEG C, second action time 15, liquid crystal in this partial grid is modulated, makes cholesteryl liquid crystal wherein have pre-set pitch.
When ensureing that good above processing conditions is constant, irradiated by transparent nozzle by the ultraviolet light of certain wavelength, polymer monomer is wherein reacted, polymerization, form reticulate texture, thus fettered cholesteric liquid crystal molecule, its pitch is no longer changed.
The independent grid now just completing target location is passed the modulation of cholesteryl liquid crystal in son, and as shown in Figure 4, the cholesteryl liquid crystal of this part just expectably can be completed after being processed by said process and reflect the blueness of given wavelength.
Carry out the modulation of the cholesteryl liquid crystal in independent grid qualifying of target location according to five above steps, as shown in Figure 5, the cholesteryl liquid crystal of this part just can be completed as scheduled after being processed by said process and reflect the green of given wavelength.So far the processing of green, blue portion is just completed.
Carry out the modulation of the cholesteryl liquid crystal in independent grid qualifying of target location according to five above steps, as shown in Figure 6, the cholesteryl liquid crystal of this part just can be completed as scheduled after being processed by said process and reflect the redness of given wavelength.So far the processing of redness, green, blue portion is just completed.
Up to the present, just obtain by red, green, the blue pixel cell formed.
According to the modulated process making redness, green, blue portion grid and inner cholesteryl liquid crystal thereof above, obtain a pixel cell, process according to set arrangement, just can realize the processing of multiple pixel on panel.As shown in Figure 7.
In the figure 7, can reflection Red, green, blue different wave length cholesteric liquid crystal there is pitch stablize, do not vary with temperature and the feature of marked change occur, and being separated by wall material between grid and grid, can not blending be there is to each other, thus ensure that the clear of display.
After above-mentioned work is carried out, the present invention makes flexible display further, as shown in Figure 8.The concrete steps making flexible display are as follows:
By certain manufacturing process attachment upper/lower electrode layer 9 on lower floor's flexible base, board 10.
By the method for above-mentioned making liquid crystal layer on lower electrode layer 9, liquid crystal layer 8 is prepared thereon.
Form fixed area 7 by solidification glue or other glue classes by fixing for liquid crystal layer 8 two ends, its effect ensures that the contraposition between electrode and liquid crystal grid is accurate, ensures that LCD screen applies accurate to a certain primary colors gray scale regulation voltage of a certain pixel in the course of the work.
Upper electrode layer 6 and upper flexible base, board 4 are bonded together by adjustment position, guarantee to coincide.
Be bonded on liquid crystal layer 8 by upper electrode layer 6 and the assembly of upper flexible base, board 4, fixed area 7 is the fixed area formed after bonding.Now to ensure that LCD screen applies accurate to a certain primary colors gray scale regulation voltage of a certain pixel in the course of the work.
The flexible reflectivity cholesteric liquid crystal displays of the making proposed in this example, as above-mentioned making, does not repeat them here.
Of the present invention is a kind of mode of preferred making flexible reflection type cholesteric liquid crystal display; it should be pointed out that the technician for this field, under the prerequisite not departing from this principle; part can be had to improve, and this kind improves also should in protection scope of the present invention.
Claims (4)
1. the preparation method of flexible reflection type cholesteric liquid crystal display, is characterized in that concrete steps are:
(1) on ground floor flexible base, board, matched conductive material is plated with its elastic modulus, as electrode; Above conductive material, utilize nozzle to eject the curing materials that can form liquid crystal circummure, utilize ultraviolet light to be fixed afterwards, form the grid can separating reflection Red, green, blue liquid crystal molecule;
(2) in specific grid, the liquid crystal of given amount and the potpourri of polymer monomer is injected by shower nozzle;
(3) second layer flexible base, board with electrode is passed through the top of solidification glue bond to above-mentioned grid enclosure wall, and do encapsulation process, form the sealed chamber of cholesteric liquid crystal molecules and polymer monomer potpourri one by one;
(4) voltage corresponding with the red pitch required and temperature can be applied with the electrode on the flexible base, board of the grid both sides of polymer monomer by the cholesteryl liquid crystal of reflection Red to for being formed, can the cholesteryl liquid crystal of reflection Red and the grid area of polymer monomer formed can the cholesteric liquid crystal molecule of reflection Red, then irradiate with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In this step, when using UV-irradiation, utilize and hide every tabula rasa the part not needing to irradiate, only irradiate that be formed can the grid at cholesteric liquid crystal molecules place of reflection Red, namely complete the fixing of the pitch of the cholesteric liquid crystal molecules of reflection Red;
(5) voltage corresponding with the green pitch required and temperature can be applied with the electrode on the flexible base, board of the grid both sides of polymer monomer by the cholesteryl liquid crystal of reflection green to for being formed, can the cholesteryl liquid crystal of reflection green and the grid area of polymer monomer formed can the cholesteric liquid crystal molecule of reflection green, then irradiate with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In this step, only UV-irradiation is carried out to the cholesteric liquid crystal molecules region being both shaped as reflection green, form reticulate texture by the reaction of polymer monomer, fix the pitch of the cholesteric liquid crystal molecules in this partial grid; The shadow shield of other certain applications given shapes gives covering of light;
(6) voltage corresponding with the blue pitch required and temperature can be applied with the electrode on the flexible base, board of the grid both sides of polymer monomer by the cholesteryl liquid crystal of reflection blue to for being formed, can the cholesteryl liquid crystal of reflection blue and the grid area of polymer monomer formed can the cholesteric liquid crystal molecule of reflection blue, then irradiate with ultraviolet light, the polymer monomer of its inside is reacted formation reticulate texture, with the pitch of the liquid crystal molecule of fixing formation;
In this step, only UV-irradiation is carried out to the cholesteric liquid crystal molecules region being both shaped as reflection blue, form reticulate texture by the reaction of polymer monomer, fix the pitch of the cholesteric liquid crystal molecules in this partial grid; The shadow shield of other certain applications given shapes gives covering of light.
2. preparation method according to claim 1, is characterized in that flexible substrate material chooses PET or PEN.
3. preparation method according to claim 1, is characterized in that conductive material is ITO or other metal oxides, or any flexibility or rigidity conductive material that elastic modulus is close with flexible base, board.
4. the flexible reflection type cholesteric liquid crystal display prepared by the described preparation method of one of claim 1-3, is characterized in that, its structure is from top to bottom: upper strata flexible base, board, upper electrode layer, liquid crystal layer, lower electrode layer, lower floor's flexible base, board; Upper electrode layer there is top electrode, lower electrode layer has bottom electrode; Liquid crystal layer is sealed between upper electrode layer and lower electrode layer; Different specific region reflection Red, green, blue three kinds of different colors of liquid crystal layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104111551A (en) * | 2014-06-28 | 2014-10-22 | 中能柔性光电（滁州）有限公司 | Flexible liquid crystal colorization display device and preparation method thereof |
| CN104049395A (en) * | 2014-06-28 | 2014-09-17 | 中能柔性光电（滁州）有限公司 | Writing or erasing method for flexible reflection type cholesteric liquid crystal displayer |
| CN104049401B (en) * | 2014-06-28 | 2017-07-07 | 中能柔性光电（滁州）有限公司 | Flexible liquid crystal colorization show in different colours GTG control method |
| CN106200094A (en) * | 2016-07-08 | 2016-12-07 | 京东方科技集团股份有限公司 | A kind of reflective display and preparation method thereof |
| CN106098962A (en) * | 2016-07-08 | 2016-11-09 | 京东方科技集团股份有限公司 | Polarization optics assembly, OLED and preparation method, display device |
| CN110109310B (en) * | 2019-06-25 | 2023-07-25 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof |
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| US6320563B1 (en) * | 1999-01-21 | 2001-11-20 | Kent State University | Dual frequency cholesteric display and drive scheme |
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