TWI588575B - Liquid crystal structure and its making method - Google Patents

Description

Liquid crystal structure and manufacturing method thereof

The invention relates to a liquid crystal structure and a manufacturing method thereof, which can mainly reflect a light source in a visible wavelength range, and can also be applied to a reflective, transmissive or semi-reflective semi-transmissive panel.

Substances that are generally found in nature can mainly distinguish between gaseous, liquid, and solid. These states can be transformed into each other under certain conditions, such as changes in temperature or pressure, which is what we generally call phase changes. For most substances, when a phase change occurs, only one phase changes to another phase, for example, from solid state to liquid state, and there is no intermediate transition zone in the process of phase change.

However, some substances change their phase and do not change directly from solid to liquid after heating and melting. These materials still have some regularity after losing some solid properties, commonly referred to as liquid crystal (LC). The substance in this state has both a certain regular arrangement state of the solid crystal and a certain degree of fluidity of the liquid. Because of this special nature, the application of liquid crystal materials is very important and extensive.

At present, the liquid crystals frequently used in the industry mainly include the following:

Smectic LC: This type of liquid crystal is a rod-like molecule arranged in a layered structure, each molecule being perpendicular to the layer or having an oblique angle, and the molecules formed are arranged in parallel with each other.

Nematic LC: Nematic liquid crystals are also arranged in parallel with rod-shaped molecules, and their molecular axis directions remain parallel, but they do not have a layered structure like a smectic liquid crystal, and have only one-dimensional regularity. It has optical positive refraction. Compared with smectic liquid crystals, the liquid crystal molecules are easy to move freely in the long axis direction, so their intermolecular forces are small, the viscosity is small, and they are easy to slide, which is used in all kinds of liquid crystals. The most liquid, the most important and most widely used LCD members.

Cholesterol LC: Cholesterol-type liquid crystals basically have asymmetric carbon atoms. In the liquid crystal composed of such molecules, the molecules are arranged in parallel in a layered manner, and the layers and the layers are parallel to each other. In each layer, the molecules have a nematic type and are generally aligned with each other, and the long axis and the layer thereof. The faces are parallel. Between adjacent layers, the long axis direction of the molecules is regularly rotated by a certain angle, and the layers are rotated to form a spiral structure.

Since cholesteric liquid crystals have bistable characteristics, they are widely used in displays that maintain state without requiring a power supply, such as electronic paper. Referring to FIG. 1 , the cholesteric liquid crystal panel 10 mainly includes a front substrate 11 and a rear substrate 15 , wherein the rear substrate 15 can be coated with black lacquer, and a cholesteric liquid crystal 13 is disposed between the two, and the cholesteric liquid crystal 13 includes A plurality of cholesteric liquid crystal molecules 131. When the voltage applied to the cholesteric liquid crystal 13 changes, the arrangement of the cholesteric liquid crystal 13 will change accordingly. For example, the cholesteric liquid crystal 13 may be a Planar Texture 103, a Focal Conic Texture 101 or Homeotropic Texture 102.

The planar arrangement 103 and the focal conic arrangement 101 are all in a steady state. In other words, when the cholesteric liquid crystal 13 is in the planar arrangement 103 or the focal conic arrangement 101, the original alignment state can be maintained without applying a voltage.

After entering the liquid crystal of the planar arrangement 103, the external light source L will cause the Bragg reflection of the light source L in a partial wavelength range to become a bright state due to the difference in the pitch of the cholesteric liquid crystal molecules 131. On the contrary, when the external light source L enters the liquid crystal of the focal conical arrangement 101, it will penetrate and be absorbed by the black paint provided on the rear substrate 15 to become a dark state.

The main object of the present invention is to provide a liquid crystal structure, which is mainly doped with a dye in a cholesteric liquid crystal, and causes the cholesteric liquid crystal to be in a fingerprint type arrangement, and the direction of the spiral axis has a certain order, whereby the structure can be used for the visible light wavelength range. The light source inside is reflected.

A secondary object of the present invention is to provide a liquid crystal structure in which a cholesteric liquid crystal is in a bright state when arranged in a fingerprint type, and a dark state in a planar arrangement, whereby the liquid crystal structure can be applied to a reflective, transmissive or Semi-reflective semi-transparent panel.

Another object of the present invention is to provide a liquid crystal structure, which mainly makes a cholesteric liquid crystal of a fingerprint type arrangement, and has a certain order of a spiral axis direction, and then freezes the fingerprint type arrangement structure by using a polymer, and the fingerprint type arrangement and the planar type The arrangement is steady state, and the switching speed between the two is faster than the conventional structure, thereby facilitating the display quality of the panel.

Another object of the present invention is to provide a method for fabricating a liquid crystal structure, which can mix a polymer monomer, a cholesteric liquid crystal (positive or dual-frequency liquid crystal) and a dye, and arrange the cholesteric liquid crystal in a planar form at d/p> In the case of 3/2, a longitudinal small electric field (about 0.3 V/um) is applied to form a fingerprint-type arrangement in the direction perpendicular to the direction of the helical axis, and then the fingerprint is frozen by the polymer. structure.

Another object of the present invention is to provide a method for fabricating a liquid crystal structure, which can mix a polymer monomer, a cholesteric liquid crystal (dual-frequency liquid crystal) and a dye, and apply a high-frequency horizontal electric field to the cholesteric liquid crystal to make the cholesterol liquid crystal display. The negative-type liquid crystal features and forms a fingerprint-like arrangement with a certain order in the direction of the spiral axis, and then a curing process such as illumination or heating is performed to promote polymerization of the polymer monomer into a polymer to freeze the fingerprint-type alignment structure. If a low-frequency high-voltage pulse in the longitudinal direction is applied, the cholesteric liquid crystal exhibits a positive liquid crystal characteristic and is switched to a planar arrangement, and a vertical low-frequency low-voltage pulse is applied to switch to a fingerprint type arrangement.

Another object of the present invention is to provide a method for fabricating a liquid crystal structure in which a cholesteric liquid crystal (negative or dual-frequency liquid crystal) and a dye are mixed, and a horizontal electric field is applied to the cholesteric liquid crystal so that the cholesteric liquid crystal is in a fingerprint type arrangement. When a vertical electric field is applied or a horizontal electric field is removed, a cholesteric liquid crystal planar arrangement structure is formed by horizontal alignment of the substrate.

In order to achieve the above object, the present invention provides a liquid crystal structure, which mainly comprises: a cholesteric liquid crystal, which is arranged in a fingerprint type, and has a certain order in the direction of the spiral axis of the cholesteric liquid crystal; and a dye which is doped into the cholesteric liquid crystal.

In addition, the present invention further provides a method for fabricating a liquid crystal structure, which mainly includes the steps of: doping at least one dye into a cholesteric liquid crystal; mixing the cholesteric liquid crystal with a polymer monomer; and switching the cholesteric liquid crystal into a spiral The axial direction has a certain order or a fingerprint type arrangement in a single direction; and the polymer monomer is subjected to a curing process to form a polymer, and the polymer is arranged to freeze the fingerprint of the cholesteric liquid crystal.

Moreover, the present invention further provides a method for fabricating a liquid crystal structure, comprising the steps of: doping at least one dye into a cholesteric liquid crystal; and placing the cholesteric liquid crystal and the dye between a first substrate and a second substrate; The cholesteric liquid crystal is switched to have a certain order in the direction of the spiral axis or a fingerprint type arrangement in a single direction; and the cholesteric liquid crystal is switched to a planar arrangement.

10‧‧‧Cholesterol LCD panel

101‧‧‧Focus Conical Arrangement

102‧‧‧Vertical arrangement

103‧‧‧flat arrangement

11‧‧‧ front substrate

13‧‧‧Cholesterol LCD

131‧‧‧Cholesterol liquid crystal molecules

15‧‧‧Back substrate

20‧‧‧Liquid structure

21‧‧‧Cholesterol LCD

211‧‧‧Cholesterol liquid crystal molecules

213‧‧‧Cholesterol liquid crystal molecules

215‧‧‧Cholesterol liquid crystal molecules

217‧‧‧Cholesterol liquid crystal molecules

23‧‧‧D dyes

25‧‧‧ polymer monomer

30‧‧‧Liquid structure

301‧‧‧Fingerprint arrangement

302‧‧‧Vertical arrangement

303‧‧‧ flat arrangement

304‧‧‧ ball-like arrangement

305‧‧‧Focus Conical Arrangement

306‧‧‧Second fingerprint type arrangement

307‧‧‧ Third fingerprint type arrangement

308‧‧‧ Fourth fingerprint type arrangement

309‧‧‧ Fifth fingerprint type arrangement

311‧‧‧First substrate

313‧‧‧second substrate

32‧‧‧reflective layer

33‧‧‧First electrode

35‧‧‧second electrode

40‧‧‧Liquid structure

45‧‧‧ polymer

46‧‧‧Insulation

47‧‧‧ third electrode

475‧‧‧fourth electrode

50‧‧‧Liquid structure

60‧‧‧Liquid structure

70‧‧‧Liquid structure

71‧‧‧Liquid Crystal Drops

72‧‧‧Microcapsule liquid crystal droplets

77‧‧‧Microcapsule shell

80‧‧‧Liquid structure

90‧‧‧Liquid crystal structure

91‧‧‧Polar plate

93‧‧‧ Outstandings

935‧‧ ‧ protrusions

95‧‧‧ slit

955‧‧‧ slit

100‧‧‧Liquid structure

110‧‧‧Liquid crystal structure

120‧‧‧Liquid structure

130‧‧‧Liquid structure

140‧‧‧Liquid structure

150‧‧‧Liquid structure

Fig. 1 is a schematic view showing the construction of a conventional cholesteric liquid crystal panel.

Fig. 2 is a schematic view showing the construction of a liquid crystal structure according to a preferred embodiment of the present invention.

Fig. 3 is a schematic view showing the structure of the liquid crystal structure of the present invention at the time of switching.

Fig. 4 is a structural schematic view showing still another embodiment of the liquid crystal structure of the present invention.

Fig. 5 is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Figure 6 is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Figure 7 is a partial plan view showing an embodiment of a liquid crystal structure of the present invention.

Fig. 8 is a partial plan view showing an embodiment of a liquid crystal structure according to the present invention.

Fig. 9 is a partial plan view showing an embodiment of a liquid crystal structure according to the present invention.

Fig. 10 is a partial plan view showing an embodiment of a liquid crystal structure according to the present invention.

Figure 11 is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Fig. 12A is a schematic view showing the configuration of still another embodiment of the liquid crystal structure of the present invention.

12B is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Fig. 13A is a schematic view showing the configuration of still another embodiment of the liquid crystal structure of the present invention.

Figure 13B is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Figure 14 is a schematic view showing the construction of a liquid crystal structure according to another embodiment of the present invention at the time of switching.

Figure 15 is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

Figure 16 is a schematic view showing the structure of still another embodiment of the liquid crystal structure of the present invention.

17A is a schematic view showing the configuration of still another embodiment of the liquid crystal structure of the present invention.

Figure 17B is a plan view of a portion of the components of the embodiment of the present invention as shown in Figure 17A.

Figure 18 is a schematic view showing the configuration of still another embodiment of the liquid crystal structure of the present invention.

Figure 19 is a schematic view showing the construction of another embodiment of the liquid crystal structure of the present invention at the time of switching.

Figure 20 is a schematic view showing the configuration of still another embodiment of the liquid crystal structure of the present invention.

Please refer to FIG. 2 , which is a schematic structural view of a liquid crystal structure according to a preferred embodiment of the present invention. As shown in the figure, the liquid crystal structure 20 of the present invention comprises a cholesteric liquid crystal 21, and is doped with a dye (Dyes) 23 in the cholesteric liquid crystal 21, as shown by the oblique line portion shown in FIG. 2, and the cholesteric liquid crystal 21 includes a plurality of The cholesteric liquid crystal molecules 211, and cause the spiral axis direction or arrangement of the cholesteric liquid crystal 21 to have a certain order of Fingerprint Texture, for example, the spiral axis of the cholesteric liquid crystal molecules 211 is directed to a single direction X1. The fingerprint-type cholesteric liquid crystal 21 is then freeze-fixed by a polymer.

The dye 23 doped in the cholesteric liquid crystal 21 of the present invention may be a dichroic dye (Dichroic Dyes). Generally, the dichroic dye may be a P-type dichroic dye having a light absorbing property in the long axis direction of the molecule. And an N-type dichroic dye having light absorption characteristics in the short axis direction of the molecule. The dye 23 is doped in the cholesteric liquid crystal 21, and the dye 23 and the cholesteric liquid crystal molecules 211 are arranged in parallel with each other, whereby the arrangement of the dye 23 will change with the movement of the cholesteric liquid crystal molecules 211.

Please refer to FIG. 3, which is a schematic structural view of the liquid crystal structure of the present invention at the time of switching. As shown in the figure, the liquid crystal structure 30 of the present invention includes a first substrate (or front substrate) 311 and a second substrate (or rear substrate) 313, and the cholesteric liquid crystal 21 and the dye 23 are disposed first. Between the substrate 311 and the second substrate 313, the cholesteric liquid crystal 21 will be a fingerprint type arrangement having a certain order in the direction of the spiral axis. For example, the cholesteric liquid crystal 21 includes a plurality of cholesteric liquid crystal molecules 211, and the spiral axis of the cholesteric liquid crystal molecules 211 X1 in a single direction. The fingerprint-type cholesteric liquid crystal 21 will be freeze-fixed by a polymer 45.

A first electrode 33 may be disposed on the first substrate 311, and a second electrode 35 is disposed on the second substrate 313. The first electrode 33 and the second electrode 35 may be used to supply a voltage to the first substrate. An electric field is formed between the 311 and the second substrate 313, whereby the electric field can change the alignment of the cholesteric liquid crystal 21 or the direction of the helical axis.

When the liquid crystal structure 30 is a Planar Texture 303, the external light source L1 and/or the backlight source L3 entering from the outside will be absorbed by the dye 23 in the liquid crystal structure 30 and become a dark state. In application, a low voltage pulse (V _L ) can be applied to the liquid crystal of the planar arrangement 303 and switched to the fingerprint arrangement 301.

Please also refer to FIG. 4, when the cholesteric liquid crystal 21 is in the fingerprint type arrangement 301, a part of the light source L1 entering from the outside will be absorbed by the dye 23, and a part of the light source L1 will penetrate the liquid crystal of the fingerprint type arrangement 301. And reflected by the reflective layer into a bright state. For example, the vertical light X5 of the polarization direction vertical cholesteric liquid crystal 21 in the helical axis direction X1 is absorbed by the dye 23, and the parallel light X4 whose polarization direction is parallel to the helical axis direction X1 of the cholesteric liquid crystal 21 penetrates the liquid crystal and is not absorbed by the dye 23, and It is reflected by the reflective layer 32 provided inside or under the second substrate 313.

When using, a high voltage pulse V _{H is} applied to the cholesteric liquid crystal 21 of the fingerprint type array 301, for example, a threshold voltage (Euw) pulse for switching the cholesteric liquid crystal 21 from the fingerprint type array 301 to the homeotropic texture 302. Thereby, the liquid crystal structure 30 will be switched to the planar arrangement 303 via the vertical alignment 302, as indicated by the arrows S1/S2.

Under actual operation, if a high voltage pulse V _{H is} applied to the liquid crystal 21 of the fingerprint type array 301, the high voltage pulse V _H will form a liquid crystal of the homeotropic texture 302 during the duration, such as the program arrow S1. When the high voltage pulse V _H is removed or disappears, the liquid crystal structure 30 will be switched from the vertical alignment 302 to the planar alignment 303, as in the program arrow S2. Since the vertical alignment 302 is generally non-steady, the vertical alignment 302 can also be referred to as a transition procedure.

Further, if a low voltage pulse is applied to the cholesteric liquid crystal 21 V _L, such as program arrow S3, the switching of the liquid crystal structure 30 in turn from the planar arrangement 303 arranged 301 fingerprint type.

Both the planar arrangement 303 and the fingerprint arrangement 301 are in a steady state. Therefore, when the liquid crystal structure 30 is switched to the planar arrangement 303 or the fingerprint arrangement 301, the voltage supply does not need to be continued, and the planar arrangement 303 or the fingerprint can be maintained for a long time. Type arrangement 301.

Since the planar arrangement 303 is in a dark state and the fingerprint-type arrangement 301 is in a bright state, the liquid crystal structure 30 of the present invention can be used on a reflective, transmissive or semi-reflective semi-transmissive panel and can be used for visible light. Light sources in the wavelength range are reflected. For example, in FIG. 4, the fingerprint type arrangement 301 has a reflective layer 32 of a part of the pixel area on the bottom layer of the second substrate 313, and a transparent layer that the backlight source L3 can penetrate through the other part of the pixel area, so the fingerprint type The array 30 is a half-reflective, semi-transmissive liquid crystal structure.

If the bottom layer of the second substrate 313 has only the backlight source L3 and no reflective layer 32, the structure is a transmissive liquid crystal structure. Moreover, if the bottom layer of the second substrate 313 has only the reflective layer 32 and no backlight source L3, the structure is a reflective liquid crystal structure.

The backlight source L3 includes at least parallel light X4 parallel to X1 and vertical light X5 perpendicular to X1. When the backlight source L3 is incident on the liquid crystal 21 from the second substrate 313, the parallel light X4 is permeable, and the vertical light X5 is absorbed, so that the transmitted light L4 has only the parallel light X4.

The external light source L1 also has parallel light X4 parallel to X1 and vertical light X5 perpendicular to X1. When the external light source L1 is incident from the first substrate 311, the vertical light X5 will be absorbed, and the parallel light X4 will reach the second substrate. 313, such as incident light L12, is reflected by the reflective layer 32 disposed on the inner, surface or bottom layer of the second substrate 313 to become a reflected light L2. The reflected light L2 is present with parallel light X4, and the reflected light L2 will penetrate the liquid crystal 21 to be reflected.

The external light source L1 will be reflected by the reflective layer 32 after penetrating the cholesteric liquid crystal 21 of the fingerprint type arrangement 301, and the liquid crystal structure is in a bright state. In addition, the steady state of the present invention is mainly between the planar arrangement 303 and the fingerprint type arrangement 301, compared to the conventional cholesteric liquid crystal panel (10) having a planar arrangement and a focal conic arrangement as a bistable structure. The switching action is made, so the switching speed can be increased to improve the quality of the display.

Please refer to FIG. 5, which is a schematic structural view of still another embodiment of the liquid crystal structure of the present invention. As shown in the figure, the liquid crystal structure 40 of the present invention includes a first substrate 311 and a second substrate 313, and at least one first electrode 33 is disposed on the first substrate 311, and the second substrate 313 is sequentially disposed. There are at least one second electrode 35 and at least one third electrode 47. An insulating layer 46 is disposed between the second electrode 35 and the third electrode 47, and the third electrode 47 is a coplanar electrode, and the cholesteric liquid crystal 21 and the dye 23 are disposed between the first substrate 311 and the second substrate 313. .

In the embodiment of the present invention, the cholesteric liquid crystal 21 can be a dual frequency liquid crystal (Dual Frequency LC), and the dual frequency liquid crystal exhibits positive liquid crystal characteristics at a low frequency voltage, and at a high frequency. Under voltage, the negative liquid crystal characteristics of the spiral axis parallel to the horizontal electric field are exhibited. Therefore, when applied, the cholesteric liquid crystal 21 (dual-frequency liquid crystal) and the dye 23 can be disposed between the first substrate 311 and the second substrate 313, and the high-frequency horizontal electric field E formed by the third electrode 47 can make the cholesteric liquid crystal 21 become The fingerprint type is arranged, and the spiral axis of the cholesteric liquid crystal 21 has a certain order in a single direction or a spiral axis direction.

In actual production, the cholesteric liquid crystal 21 may be mixed with a polymer monomer (for example, BAB6) 25, and polymerized to freeze the fingerprint type arrangement, and then pass through the low frequency electric field between the first electrode 33 and the second electrode 35. To change the arrangement of the cholesteric liquid crystals 21. By inputting a longitudinal high voltage pulse, for example, a longitudinal low frequency high voltage pulse, to the first electrode 33 and the second electrode 35, the cholesteric liquid crystal 21 can be switched to a planar arrangement; if the first electrode 33 and the second electrode 35 are re-entered A longitudinal low voltage pulse, such as a longitudinal low frequency low voltage pulse, switches the cholesteric liquid crystal 21 to a fingerprint type arrangement.

At the time of production, at least one dye 23 is doped into the cholesteric liquid crystal 21; the cholesteric liquid crystal 21 is mixed with a polymer monomer 25; and the cholesteric liquid crystal 21 has a certain order or a fingerprint direction in a single direction. Arrangement; finally, the polymer monomer 25 is subjected to a curing process such as light irradiation or heating to freeze the cholesterol liquid crystal 21, for example, to maintain the fingerprint type alignment structure.

In an embodiment of the present invention, after the polymer monomer 25 is subjected to a curing process such as light irradiation or heating, the polymer monomer becomes a polymer 45, and the polymer freezes the structure of the cholesteric liquid crystal 21.

Since the cholesteric liquid crystal 21 of the present invention will be a fingerprint type arrangement, the direction of the spiral axis has a certain order or a single direction, and the polymer 45 formed by the polymer monomer 25 is arranged in a frozen fingerprint type, so even after The horizontal electric field E is no longer formed by the third electrode 47, and the cholesteric liquid crystal 21 still maintains its fingerprint type arrangement.

The high voltage pulses or low voltage pulses of the foregoing embodiments are all words that can be easily considered by professionals in the field of cholesterol liquid crystals, for example, published in (http://osdlab.eic.nctu.edu.tw/LC /data/issues/2004_1/05.pdf): China Liquid Crystal Society Newsletter - 2004, Issue 1 (June 2004) - Cholesterol-type LCD e-book (E-Book), so in the present invention, no high voltage pulse And a low voltage pulse for a detailed definition or description.

Please refer to FIG. 6 , which is a schematic structural view of still another embodiment of the liquid crystal structure of the present invention. As shown in the figure, the liquid crystal structure 50 of the present invention includes a first substrate 311 and a second substrate 313. The second substrate 313 is provided with at least one third electrode 47, and is disposed on the first substrate 311 and the second substrate 313. Cholesteric liquid crystal 21 and dye 23 are disposed between each other.

In the embodiment of the present invention, the cholesteric liquid crystal 21 is a negative liquid crystal, and when the third electrode 47 generates a horizontal electric field E that is horizontal to the first substrate 311 and/or the second substrate 313, the cholesterol is caused. The liquid crystal 21 is a fingerprint type arrangement in which a spiral axis has a certain order or a single direction. When the horizontal electric field E formed by the third electrode 47 is removed, the cholesteric liquid crystal 21 becomes a planar arrangement due to the horizontal alignment of the first substrate 311 and the second substrate 313.

Of course, in the actual application, at least one first electrode 33 may be disposed on the first substrate 311, and at least one second electrode 35 is disposed on the second substrate 313, and an insulating layer 46 is interposed between the second electrodes. 35 is between the third electrode 47. When a longitudinal electric field E1 is formed or applied between the first electrode 33 and the second electrode 35, the cholesteric liquid crystal 21 can be arranged in a planar arrangement, whereby the structural morphological conversion speed of the cholesteric liquid crystal 21 is favored.

For this reason, the setting of the first electrode 33, the second electrode 35, and/or the third electrode 47 may be adjusted or changed depending on the characteristics of the cholesteric liquid crystal 21.

Please refer to FIG. 7 , which is a partial structural plan view of an embodiment of a liquid crystal structure according to the present invention. The third electrode 47 shown in the fifth and sixth figures of the present invention may be disposed in a strip shape, and the adjacent two third electrodes 47 will be parallel to each other, whereby the spiral axis of the cholesteric liquid crystal 21 will be directed toward Single direction, such as the first direction X1 shown in Figure 7.

In still another embodiment of the present invention, the third electrode 47 may have a "ㄑ" shape as shown in FIG. 8, or a wave shape as shown in FIG. 9, or a spiral shape or a polygonal shape as shown in FIG. In the way of setting, the direction of the spiral axis of the cholesteric liquid crystal 21 will have a certain order, but not all of them are in the same single direction, and the spiral axis of the partial cholesteric liquid crystal 21 faces the second direction X2, and there is a part of the cholesteric liquid crystal 21 The screw shaft will be X3 in the third direction.

In the present embodiment, the direction of the spiral axis of the cholesteric liquid crystal 21 has a certain order, but it is not only the single direction X2 or the single direction X3, which is different from the single direction X1 in the embodiment shown in Fig. 7. In terms of a single pixel, although the direction of the spiral axis is not directed to a single direction, in the case of a part of the pixel, the direction of the spiral axis still has a single direction. Therefore, the direction of the spiral axis of the cholesteric liquid crystal 21 has a certain order.

Please refer to FIG. 11 , which is a schematic structural view of still another embodiment of the liquid crystal structure of the present invention. As shown in the figure, the liquid crystal structure 60 of the present invention includes a first substrate 311 and a second substrate 313, and at least one first electrode 33 is disposed on the first substrate 311, and at least a second substrate 313 is disposed on the second substrate 313. A second electrode 35, and a cholesteric liquid crystal 21 having a positive liquid crystal characteristic and a dye 23 are disposed between the first substrate 311 and the second substrate 313.

In application, after forming the first electrode 33 and the second electrode 35, the first electricity will be The surface of the pole 33 / the second electrode 35 and / or the first substrate 311 / the second substrate 313 are horizontally aligned or anti-parallel to each other, as shown in the formula X6. Applying a longitudinal small electric field E2 to the planar arrangement of the cholesteric liquid crystal 21 by the first electrode 33 and the second electrode 35, for example, at d/p>3/2 (d is the panel pitch, p is the cholesteric liquid crystal pitch) Under the condition of the planar arrangement 303, a longitudinal small electric field E2 of about 0.3 V/um is applied to the cholesteric liquid crystal 21, whereby the cholesteric liquid crystal 21 can be made into a fingerprint-type arrangement 301 in which the helical axis is perpendicular to the horizontal alignment direction X6. The polymer 45 formed of a polymer monomer freezes the cholesteric liquid crystal 21 in the fingerprint-type array structure 301.

In application, a high voltage pulse can be input to the first electrode 33 and the second electrode 35 to switch the cholesteric liquid crystal 21 from the fingerprint type arrangement 301 to the planar type arrangement 303. When a low voltage pulse is input to the first electrode 33 and the second electrode 35, the cholesteric liquid crystal 21 can be switched from the planar arrangement 303 to the fingerprint arrangement 301, as shown in FIG. 3, the program S1/S2/S3. .

In still another embodiment of the present invention, the positive liquid crystal may also use a dual frequency liquid crystal in combination with a low frequency voltage to make it exhibit a positive liquid crystal characteristic. Similarly, the negative-type liquid crystal can also use a dual-frequency liquid crystal with a high-frequency voltage to make it exhibit negative-type liquid crystal characteristics.

Next, please refer to FIG. 12A, which is a schematic diagram of the configuration at the time of switching according to still another embodiment of the present invention. The liquid crystal structure 70 of the present invention can also be applied to a Polymer Dispersed Cholesteric Liquid Crystal (PDCLC) doped with a large amount of polymer monomers, mainly by doping the cholesteric liquid crystal 21 with at least one dye 23, And mixed with a high molecular monomer (25), and need to regulate the liquid crystal / polymer monomer (CLC / monomer) weight ratio.

The prepared cholesterol liquid crystal 21, the dye 23, and the polymer monomer (25) are placed between the first substrate 311 and the second substrate 313. The polymer monomer (25) and the cholesteric liquid crystal 21 are subjected to a curing process such as light irradiation or heating to form a polymer 45 and a plurality of liquid crystal droplets 71, and the polymer 45 will coat the liquid crystal droplets 71, and the liquid crystal droplets There are cholesterol liquid crystal 21 and dye 23 in 71.

If the formation conditions are properly matched, for example, the alignment process, the liquid crystal/polymer weight ratio, the light/heating curing process, and/or the liquid crystal droplet size is much larger than the liquid crystal pitch, the cholesteric liquid crystal 21 and the dye 23 will be in the liquid crystal droplet 21 A spherulite arrangement 304 is formed therein.

In an embodiment of the invention, the cholesteric liquid crystal 21 can be a negative liquid crystal or a dual frequency liquid crystal which can exhibit a negative characteristic, such as an E7 (nematic) liquid crystal. The polymer monomer (25) can be selected from a NOA65 material (lighting or heating will be a polymer monomer), and the liquid crystal/polymer monomer weight ratio is regulated to 1:1, thereby forming a ball-like shape. The liquid crystal array 304.

A horizontal electric field E is input between the first substrate 311 and the second substrate 313. For example, the horizontal electric field E formed by the third electrode 47 can align the spherical cholesteric liquid crystal 21 and the dye 23 from the ball-like shape 304. Switching to the fingerprint type arrangement 301, and the cholesteric liquid crystal 21 of the fingerprint type arrangement 301 will have a certain order or a spiral axis in a single direction.

If the horizontal electric field E is removed again, the cholesteric liquid crystal 21 located in the liquid crystal droplet 71 can be switched from the fingerprint type arrangement 301 to the ball-like arrangement 304. Therefore, the dark state of the liquid crystal structure 70 can be determined by the presence or absence of the horizontal electric field E. For example, the ball-like arrangement 304 is in a dark state, and the fingerprint-type arrangement 301 is in a bright state.

In another embodiment of the present invention, as shown in FIG. 12B, if the cholesteric liquid crystal 21 is a positive liquid crystal or a dual frequency liquid crystal which can exhibit a positive characteristic, the input between the first substrate 311 and the second substrate 313 A longitudinal electric field E1, for example, a longitudinal electric field E1 formed by the first electrode 33 and the second electrode 35, the cholesteric liquid crystal 21 and the dye 23 in the spheroidal arrangement 304 are switched to the fingerprint type arrangement 301. Therefore, the dark state of the liquid crystal structure 70 can be determined by the presence or absence of the longitudinal electric field E1. For example, the fingerprint type arrangement 301 is in a bright state, and the ball-shaped arrangement 304 is in a dark state.

Please refer to FIG. 13A, which is a schematic diagram of a configuration of a further embodiment of the present invention at the time of switching. The liquid crystal structure 80 of the present invention can be applied to a microcapsule cholesteric liquid crystal structure. Using a well-known microcapsule process technology, such as a microcapsule-like technique for forming an electrophoretic display, a plurality of microcapsule liquid crystal droplets 72 can be formed, while the microcapsule liquid crystal droplets 72 utilize a microcapsule shell layer 77 to coat the cholesterol. The liquid crystal 21 and the dye 23 form a ball-like arrangement 304. The cholesteric liquid crystal 21 system can be selected with a negative liquid crystal or a dual-frequency liquid crystal which can exhibit a negative liquid crystal characteristic.

Similarly, the dark state of the liquid crystal structure 80 can be determined by the presence or absence of the horizontal electric field E. For example, the spherical arrangement 304 in the absence of the horizontal electric field E is in a dark state, and the fingerprint arrangement 301 in the presence of the horizontal electric field E is in a bright state.

Of course, as shown in FIG. 13B, if the cholesteric liquid crystal 21 is a positive liquid crystal or a dual frequency liquid crystal which can exhibit a positive characteristic, the presence or absence of the vertical electric field E1 can also determine the darkness of the liquid crystal structure 80. Aspect. For example, the fingerprint type arrangement 301 in the presence of the longitudinal electric field E1 is in a bright state, and the spherical arrangement 304 in the absence of the longitudinal electric field E1 is in a dark state.

In addition, referring to FIG. 14, a schematic diagram of a configuration of another embodiment of the present invention at the time of switching, the liquid crystal structure 90 of the present embodiment is similar to the embodiment shown in FIG. 3, and the dual-frequency liquid crystal 21 and the dye 23 are mixed and placed. Between the first substrate 311 and the second substrate 313.

When a longitudinal electric field E2 is generated between the first electrode 33 and the second electrode 35, the liquid crystal structure 90 will become the focal conic arrangement 305, exhibiting a positive liquid crystal characteristic. And the cholesteric liquid crystal 21 is switched to the vertical arrangement of 302 (V _H during the continuous supply) via one of the input high voltage (V _H), as indicated by arrows S1, input or a high voltage pulse (V _H) is switched to the planar arrangement 303 , such as the arrow S1/S2. Also, when a longitudinal low voltage pulse (V _L ) is input, the liquid crystal structure 90 of the planar array 303 can be switched back to the focal conic arrangement 305, as indicated by arrow S3.

In the case of the planar arrangement 303, the vertical alignment 302 or the focal conic arrangement 305, if the horizontal electric field E formed by the third electric field 47 is input, the dual-frequency liquid crystal 21 will exhibit a negative liquid crystal characteristic, so that the cholesteric liquid crystal 21 becomes The spiral axis has a certain order or a fingerprint type arrangement 301 in a single direction, and the fingerprint type arrangement 301 is in a bright state, such as an arrow S4 or S5.

By the selection of the type of dye 23 and/or cholesteric liquid crystal 21, the bright and dark states of the fingerprint type arrangement 301, the planar type arrangement 303 or the focal conic type arrangement 305 can be matched with the design.

FIG. 15 is a schematic view showing a configuration of another embodiment of the present invention. The liquid crystal structure 100 of the present invention is mainly provided with a polarizing plate 91 and a fourth electrode 475 on the first substrate 311, and a second substrate 313. There is a third electrode 47, and the fourth electrode 475 is formed in a vertical manner with the third electrode 47, and the fourth electrode 475 and the third electrode 47 are each a coplanar electrode.

In this embodiment, the passing axis direction X6 of the polarizing plate 91 is the incident paper surface, and the external light source L1 has the horizontal X4 and the vertical light X5 parallel to the X axis, and the vertical light X5 is in the same direction as the passing axis direction X6.

When the third electrode 47 forms the horizontal electric field E, the cholesteric liquid crystal 21 of the liquid crystal structure 100 can be switched from the planar arrangement (303) to the (first) fingerprint type arrangement 301, and the spiral axis of the cholesteric liquid crystal 21 has a certain order or a single Direction X1. When the external light source L1 passes through the polarizing plate 91, the horizontal light X4 of the external light source will be filtered out, and only the vertical light X5 directed to the paper surface is allowed to pass to form the incident light L12. The incident light L12 is absorbed or scattered by the dye 23, and does not form reflected light (L2). Therefore, the (first) fingerprint type array 301 is in a dark state.

When the horizontal electric field E of the third electrode 47 disappears, the cholesteric liquid crystal 21 of the liquid crystal structure 100 can be switched from the first fingerprint type arrangement 301 to the planar type arrangement (303).

When the fourth electrode 475 forms the second horizontal electric field E3, the cholesteric liquid crystal 21 of the liquid crystal structure 100 can be switched from the planar arrangement (303) to the second fingerprint type arrangement 306, and the spiral axis of the cholesteric liquid crystal 21 has a certain order or a single direction. X6 (pointing to the paper). When the external light source L1 passes through the polarizing plate 91, only the vertical light X5 directed to the paper surface is allowed to pass to form the incident light L12. The incident light L12 having the X5 direction passes through the cholesteric liquid crystal 21 and the dye 23, and is reflected by the mirror 32 to form a reflected light L2. Therefore, the second fingerprint type arrangement 306 is in a bright state.

Similarly, when the second horizontal electric field E3 of the fourth electrode 475 disappears, the cholesteric liquid crystal 21 of the liquid crystal structure 100 can be switched from the second fingerprint type arrangement 306 to the planar type arrangement (303).

The spiral electric axis direction of the cholesteric liquid crystal 21 can be determined by the (first) horizontal electric field E formed by the third electrode 47 or the second horizontal electric field E3 formed by the fourth electrode 475, and is passed through the polarizing plate 91. A dark state in which the axial directions are perpendicular to each other, or a horizontal state in which the direction of the passing direction of the polarizing plate 91 is horizontal.

In still another embodiment of the present invention, the first fingerprint type arrangement 301 or the second type fingerprint type arrangement 306 may be fixed by freezing by the formation of the polymer 45, and then selected by the third electrode 47 or the fourth electrode 475. The lateral horizontal electric field E or E3 (as shown in Fig. 17B) is generated to change the direction of the helical axis of the cholesteric liquid crystal 21, so that the dark state of the liquid crystal structure 100 can also be produced.

For example, the first fingerprint type arrangement 301 is freeze-fixed by the polymer 45, and the spiral axis direction of the first fingerprint type array 301 is made perpendicular to the direction of the passing axis of the polarizing plate 91 to be in a dark state. By the second horizontal electric field E3 formed by the fourth electrode 475, the spiral axis of the cholesteric liquid crystal 21 can be rotated by 90 degrees so as to be in the same direction as the direction of the passing axis of the polarizing plate 91, so as to become the second fingerprint type arrangement 306. Bright state. When the second horizontal electric field E3 is removed, the cholesteric liquid crystal 21 can be switched from the second fingerprint type array 306 to the dark type first fingerprint type array 301.

In still another embodiment of the present invention, the first fingerprint type arrangement 301 (or the second type fingerprint type arrangement 306) may also be applied to the method as shown in FIG. 11, that is, the dual-frequency liquid crystal 21 first passes through a longitudinal small electric field. After the E2 and the alignment process are performed to form the fingerprint type arrangement 301, the first fingerprint type arrangement 301 is freeze-fixed by the polymer 45 through a curing process. Then, the fourth electrode 475 is used to change the dual-frequency liquid crystal 21 to the second-type fingerprint type array 306, thereby achieving the purpose of matching the polarizing plate 91 to switch the dark state of the liquid crystal structure 100.

In this embodiment, the first electrode (33) and the second electrode (35) must be present, but the third electrode 47 and the fourth electrode 475 need only be selected. Of course, if the first electrode (33) is disposed on the first substrate 311, an insulating layer may also exist between the first electrode (33) and the fourth electrode 475.

Please refer to FIG. 16 , which is a schematic structural view of another embodiment of the present invention, with a gap thickness d between the first substrate 311 and the second substrate 313 . If the liquid crystal structure 110 is in the second type fingerprint type arrangement 306, the passing axis of the external light source L1 or the backlight source L3 is parallel to the spiral axis direction of the cholesteric liquid crystal 21 (or the same direction), then the external light source L1 or the backlight source L3 will It can be reflected or penetrated such that the liquid crystal structure 110 is in a bright state in the second type fingerprint pattern arrangement 306.

When the third electrode 47 generates the lateral horizontal electric field E, the cholesteric liquid crystal molecules 213 close to the third electrode 47 will form a first fingerprint type arrangement (301) whose spiral axis is oriented toward X1 and parallel to the horizontal electric field E, away from the third electric field. Since the condensed liquid crystal molecules 215 of 47 are widened by the thickness d, they are not affected by the horizontal electric field E, or the second type fingerprint type arrangement 306 is maintained to become a third type fingerprint type arrangement 307. The spiral axes of the cholesteric liquid crystal molecules 213 and the cholesteric liquid crystal molecules 215 in the third type fingerprint type arrangement 307 will be perpendicular to each other, regardless of whether the external light source L1 or the backlight source L3 will be absorbed by the cholesteric liquid crystal 21 and/or the dye 23, and thus the third The fingerprint type arrangement 307 will become a dark state.

If the horizontal electric field E is removed, since the second type fingerprint type arrangement 306 has been frozen and fixed by a polymer 45, the liquid crystal structure 110 can be switched from the third type fingerprint type arrangement 307 back to the bright type second type fingerprint type arrangement. 306. The cholesteric liquid crystal 21 system can be selected from a negative liquid crystal or a dual frequency liquid crystal having a liquid crystal characteristic.

In the drawing, the cholesteric liquid crystal 217 interposed between the cholesteric liquid crystal 213 and the cholesteric liquid crystal 215 is affected by a portion of the horizontal electric field E, so that the helical axis X7 thereof is rotated by an angle, for example, 45 degrees.

17A and 17B are top views of a further embodiment of the present invention and a top view of a third electrode 47/fourth electrode 475, which can be fabricated by the foregoing embodiments. The method is to form a fingerprint type arrangement, such as the second fingerprint type arrangement 306, which is a bright state. When the fourth electrode 475 disposed on the first substrate 311 generates a lateral second horizontal electric field E3, and the third electrode 47 disposed on the second substrate 313 simultaneously generates a (first) horizontal electric field E, the adjacent cholesteric liquid crystal molecules 215/213 will be affected, and the third fingerprint type arrangement 307, which forms a spiral axis of the cholesteric liquid crystal molecules 215/213, is a dark state.

The fourth electrode 475 is a coplanar electrode like the third electrode 47, and the fourth electrode 475 can also be a strip shape, a "ㄑ" shape, a wave shape, a polygon shape or a spiral shape.

In this embodiment, the lateral second horizontal electric field E3 can be generated by the fourth electrode 475 to maintain the bright state of the second fingerprint type arrangement 306, and the presence of the (first) horizontal electric field E by the third electrode 47 is No to determine whether to form the dark state of the third fingerprint type arrangement 307.

In another embodiment, the polymer 45 can be used to freeze and fix the bright state of the second fingerprint type arrangement 306, and then the presence or absence of the (first) horizontal electric field E of the third electrode 47 is used to determine whether or not to form the first The dark state of the three fingerprint type arrangement 307.

This embodiment can also be used in combination with the polarizing plate (91) described above, and the switching between the second fingerprint type arrangement 306 and the third fingerprint type arrangement 307 can be used to determine whether the light can pass through the polarizing plate (91). Through the axis, the dark state of the liquid crystal structure 120 can also be changed relatively.

In addition, please refer to FIG. 18, which is a schematic structural view of still another embodiment of the present invention. The liquid crystal structure 130 of the present invention is mainly provided with a first electrode 33 on the first substrate 311, and at least one bump 93 and/or at least one slit 95 is disposed on the first electrode 33, and the second substrate A second electrode 35 is provided on the 313.

When a longitudinal electric field (E4) is generated between the first electrode 33 and the second electrode 35, the longitudinal electric field will be formed into an oblique electric field E4 due to the action of the protrusion 93 and/or the slit 95, and the oblique electric field E4 will have The nature of the horizontal electric field (E) is approximated, and the cholesteric liquid crystal 21 and the dye 23 are also relatively affected to change their helical axes, so that the liquid crystal structure 130 will be switched from the planar arrangement 303 to the fourth fingerprint arrangement 308. It is thus also possible to change the darkness of the liquid crystal structure 130.

Of course, if the oblique electric field E4 is removed, the liquid crystal structure 130 can be switched from the bright state of the fourth fingerprint arrangement 308 to the dark state of the planar arrangement 303.

The embodiment can also be used in combination with the polarizing plate (91), and the switching between the planar arrangement 303 and the fourth fingerprint arrangement 308 can be used to determine whether the light can pass through the axis of the polarizing plate (91), and can also be changed. The dark state of the liquid crystal structure 130.

Referring to FIG. 19, it is a schematic diagram of a configuration of a further embodiment of the present invention. When the liquid crystal structure 140 of the present invention forms a fourth fingerprint type array 308 by oblique electric field E4, a polymer monomer can be used. The formed polymer 45 freezes and fixes the structure of the fourth fingerprint type arrangement 308, and is in a bright state. Then, a high voltage pulse and/or a low voltage pulse between the first electrode 33 and the second electrode (35) is used as a switch of the fourth fingerprint type arrangement 308, the planar type arrangement 303 or the vertical type arrangement 302, thereby Switching between dark/bright states or bistable states of the liquid crystal structure 140 is obtained.

In still another embodiment of the present invention, the second electrode (35) may also be replaced by a third electrode or a pixel electrode 47, and the third electrode 47 or the second electrode (35) may also be formed with a slit 955 or a The protrusion 935 can also achieve the purpose of generating an oblique electric field E4.

Also, the protrusions 93/935 and/or the slits 95/955 can be a ring, a concentric circle or a polygon.

Finally, please refer to FIG. 20 , which is a schematic structural view of another embodiment of the present invention. The liquid crystal structure 150 of the present invention can also heat the cholesteric liquid crystal 21 to an isotropic liquid state and then cool down, so that each Although the spiral axis of the cholesteric liquid crystal 21 is parallel to the first substrate 311 or the second substrate 313, the directions of the spiral axes are not the same or have a certain order, for example, X1, X5 and X7, to form a fifth fingerprint type arrangement 309. Dark state.

Reusing the polymer 45 to freeze and fix the fifth fingerprint type arrangement 309, and then using the The horizontal electric field E generated by the three electrodes 47 can switch the liquid crystal structure 150 to the bright state of the first fingerprint type arrangement 301. If the horizontal electric field E is removed again, the fifth fingerprint type arrangement 309 of the dark state can be switched back. Thus, the purpose of switching the bright state of the liquid crystal structure 150 of the present invention can be achieved.

Of course, in another embodiment of the present invention, when the cholesteric liquid crystal is a positive liquid crystal or a dual frequency liquid crystal having a positive liquid crystal characteristic, when the polymer 45 is frozen and fixed to the fifth fingerprint type array 309, a vertical small length can be utilized. The electric field can also switch the liquid crystal structure 150 to the bright state of the first fingerprint type arrangement 301.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the practice of the present invention, such as positive liquid crystal, dual frequency liquid crystal, negative liquid crystal or dye material combination to change the dark state, etc. Variations, modifications, and modifications of the shapes, structures, features, and spirits of the present invention should be included in the scope of the present invention.

21‧‧‧Cholesterol LCD

211‧‧‧Cholesterol liquid crystal molecules

23‧‧‧D dyes

30‧‧‧Liquid structure

301‧‧‧Fingerprint arrangement

302‧‧‧Vertical arrangement

303‧‧‧ flat arrangement

311‧‧‧First substrate

313‧‧‧second substrate

32‧‧‧reflective layer

33‧‧‧First electrode

35‧‧‧second electrode

Claims (26)

A liquid crystal structure mainly comprises: a cholesteric liquid crystal arranged in a fingerprint type, and the direction of the spiral axis of the cholesteric liquid crystal has a certain order, the cholesteric liquid crystal comprises a plurality of cholesteric liquid crystal molecules, and the spiral axis of the cholesteric liquid crystal molecule The direction has a certain order or in a single direction; and a dye is doped into the cholesteric liquid crystal. The liquid crystal structure according to claim 1, wherein a polymer is disposed in the cholesteric liquid crystal, and the polymer can be used to freeze the structure of the cholesteric liquid crystal. The liquid crystal structure according to claim 2, wherein the polymer freezes the cholesteric liquid crystal into a fingerprint type arrangement in which the spiral axis is oriented in a single direction or has a certain order. The liquid crystal structure according to claim 1, comprising a horizontal electric field to maintain the cholesteric liquid crystal in a fingerprint type arrangement. The liquid crystal structure according to claim 1, comprising a first substrate and a second substrate, and the cholesteric liquid crystal and the dye are disposed between the first substrate and the second substrate. The liquid crystal structure of claim 5, wherein the first substrate is provided with at least one first electrode, and the second substrate is provided with at least one second electrode. The liquid crystal structure of claim 6, wherein the second electrode is provided with at least one third electrode, and the second electrode and the third electrode are provided with an insulating layer, and the third electrode is a coplanar electrode And the third electrode is configured to provide a horizontal electric field to the cholesteric liquid crystal. The liquid crystal structure of claim 5, wherein the second substrate is provided with at least one third electrode, and the third electrode is a coplanar electrode. The liquid crystal structure according to claim 7, comprising a polymer disposed in the cholesteric liquid crystal for freezing the cholesteric liquid crystal into a fingerprint type arrangement in which the spiral axis has a certain order in a single direction or a spiral axis. The liquid crystal structure of claim 9, wherein a longitudinal high voltage pulse is input between the first electrode and the second electrode, so that the cholesteric liquid crystal is switched to a planar arrangement, and the first electrode and the second electrode are By inputting a longitudinal low voltage pulse between the electrodes, the cholesteric liquid crystal will switch to a fingerprint type arrangement. The liquid crystal structure according to claim 6, wherein the cholesteric liquid crystal is a positive liquid crystal or a dual frequency liquid crystal, and the first electrode and the second electrode surface have horizontal alignments parallel or antiparallel to each other. Inputting a first electrode between the first electrode and the second electrode The longitudinal small electric field is such that the cholesteric liquid crystal becomes a fingerprint type arrangement. The liquid crystal structure according to claim 11, further comprising a polymer disposed in the cholesteric liquid crystal, wherein the polymer can be used to freeze the cholesteric liquid crystal into the fingerprint type arrangement. The liquid crystal structure according to claim 12, wherein a longitudinal high voltage pulse is input between the first electrode and the second electrode, so that the cholesteric liquid crystal is switched to a planar arrangement, and the first electrode and the second electrode are By inputting a longitudinal low voltage pulse between the electrodes, the cholesteric liquid crystal will switch to a fingerprint type arrangement. The liquid crystal structure according to claim 7, wherein the cholesteric liquid crystal is a negative liquid crystal or a dual frequency liquid crystal, and the third electrode will provide a horizontal electric field, so that the cholesteric liquid crystal is formed into a fingerprint type arrangement, and The horizontal electric field removal or providing a longitudinal electric field can cause the cholesteric liquid crystal to switch to a planar arrangement. The liquid crystal structure according to claim 14, comprising a polymer disposed in the cholesteric liquid crystal for freezing the cholesteric liquid crystal into a fingerprint type arrangement in which the spiral axis has a certain order in a single direction or a spiral axis. The liquid crystal structure according to claim 7, wherein the horizontal electric field acts on the cholesteric liquid crystal arranged in a planar arrangement or a focal conical arrangement, and causes the cholesteric liquid crystal to switch to the fingerprint type arrangement, and the horizontal electric field is removed. Or providing a longitudinal electric field can cause the cholesteric liquid crystal to switch to a planar arrangement or a focal conic arrangement. A method for fabricating a liquid crystal structure, comprising the steps of: doping at least one dye into a cholesteric liquid crystal; mixing the cholesteric liquid crystal with a polymer monomer; and switching the cholesteric liquid crystal into a spiral axis direction with a certain order Or a fingerprint-type arrangement in a single direction; and a curing process of the polymer monomer to form a polymer, and the fingerprint is arranged by freezing the liquid crystal by the polymer. The production method according to claim 17, wherein the cholesteric liquid crystal is a negative liquid crystal or a dual frequency liquid crystal, and a horizontal electric field is applied to the cholesteric liquid crystal, so that the cholesteric liquid crystal becomes the fingerprint type arrangement. The manufacturing method of claim 17, further comprising the steps of: forming a first electrode on a first substrate; forming a second electrode, an insulating layer and a second substrate on a second substrate; a third electrode; a cholesteric liquid crystal, a dye, and a polymer monomer are disposed between the first substrate and the second substrate; And the third electrode forms a horizontal electric field and is switched to a fingerprint type by the horizontal electric field. The manufacturing method according to claim 19, further comprising the steps of: generating a longitudinal high voltage pulse between the first electrode and the second electrode, and switching the cholesteric liquid crystal into a planar type by a longitudinal high voltage pulse Arranging; and generating a longitudinal low voltage pulse between the first electrode and the second electrode, and causing the cholesteric liquid crystal to switch back to the fingerprint type arrangement by a longitudinal low voltage pulse. The manufacturing method according to claim 17, wherein the cholesteric liquid crystal is a positive liquid crystal or a dual frequency liquid crystal, and a longitudinal small electric field is applied to the cholesteric liquid crystal, so that the cholesteric liquid crystal becomes the fingerprint type arrangement, and The method includes the steps of: forming a first electrode on a first substrate, forming a second electrode on a second substrate, and the first electrode surface and the second electrode surface are horizontally aligned with each other in parallel or anti-parallel Processing; placing a cholesteric liquid crystal, a dye, and a polymer monomer between the first substrate and the second substrate; and generating a longitudinal small electric field between the first electrode and the second electrode, and switching the cholesteric liquid crystal by a longitudinal small electric field Arranged for fingerprint type. The manufacturing method as described in claim 21, further comprising the steps of: generating a longitudinal high voltage pulse between the first electrode and the second electrode, and causing the cholesteric liquid crystal to be arranged from the fingerprint by the longitudinal high voltage pulse Switching to a planar arrangement; and generating a longitudinal low voltage pulse between the first electrode and the second electrode, and switching the cholesteric liquid crystal from a planar arrangement back to a fingerprint type arrangement by a longitudinal low voltage pulse. A method for fabricating a liquid crystal structure, comprising the steps of: doping at least one dye into a cholesteric liquid crystal; placing a cholesteric liquid crystal and a dye between a first substrate and a second substrate; and switching the cholesteric liquid crystal into a spiral The axial direction has a certain order or a fingerprint type arrangement in a single direction; and the cholesteric liquid crystal is switched into a planar arrangement. The manufacturing method according to claim 23, wherein the cholesteric liquid crystal system can be a negative liquid crystal or a dual frequency liquid crystal, and the dual frequency liquid crystal can be subjected to an external electric field to exhibit a negative liquid crystal characteristic, and The method includes the steps of: inputting a horizontal electric field to cause the cholesteric liquid crystal to form a fingerprint type arrangement; The horizontal electric field is removed or a longitudinal electric field is input to cause the cholesteric liquid crystal to switch to a planar arrangement. The manufacturing method of claim 24, further comprising the steps of: providing a first electrode on the first substrate; and sequentially forming a second electrode, an insulating layer and a third on the second substrate; An electrode; the third electrode will generate the horizontal electric field such that the cholesteric liquid crystal is switched to a fingerprint type arrangement; and the longitudinal electric field is generated between the first electrode and the second electrode to cause the cholesteric liquid crystal to switch to a planar arrangement. The manufacturing method according to claim 23, wherein the cholesteric liquid crystal system can be a positive liquid crystal or a dual frequency liquid crystal, and the dual frequency liquid crystal can exhibit a positive liquid crystal characteristic through an applied electric field, and The method includes the steps of: forming a first electrode on the first substrate and forming a second electrode on the second substrate, and the first electrode surface and the second electrode surface are horizontally aligned or anti-parallel. a longitudinal small electric field is generated between the first electrode and the second electrode, and the cholesteric liquid crystal is switched to a fingerprint type arrangement by a longitudinal small electric field; and a longitudinal high voltage pulse is generated between the first electrode and the second electrode, and The longitudinal high voltage pulse is applied to switch the cholesteric liquid crystal from the fingerprint type arrangement to the planar type arrangement.