TWI356250B - Method for making liquid crystal display screen - Google Patents

Description

1356250 [ΐοο年. October 28th nuclear jade six, invention description: ~~~-- [Technical field of invention] [〇〇〇1] The present invention relates to a liquid crystal display screen preparation method, in particular, relates to A method of preparing a liquid crystal display of a carbon nanotube. [Prior Art] 闺 Liquid crystal alignment technology is one of the advantages and disadvantages of mosquito liquid crystal display, because the quality of liquid crystal alignment technology will directly predict the quality of the final LCD screen. A high-quality liquid crystal display requires a liquid crystal to have a stable and uniform initial arrangement, and a thin layer that induces liquid crystal alignment is called an alignment layer. ‘Please refer to the liquid crystal display 100 shown in FIG. 1, which includes a first substrate 1〇4, a second substrate 112, and a liquid crystal layer 118 sandwiched between the first substrate 1〇4 and the second substrate 112. The first substrate 104 is disposed opposite to the second substrate 112. The liquid crystal layer 118 includes a plurality of long rod-shaped liquid crystal molecules Η". The first substrate 〇4 is disposed adjacent to the surface of the liquid crystal layer 118, and a first transparent electrode layer 〇6 and a first alignment layer 108 are disposed in sequence. A first polarizer 102 is disposed on the surface of the first substrate 1 4 away from the liquid crystal layer Mg. The second substrate 112 is disposed adjacent to the surface of the liquid crystal layer 118 in sequence with a second transparent electrode layer 114 and a second alignment layer 116. And a second polarizer 11 is disposed on the surface of the second substrate 112 away from the liquid crystal layer 118. [0005] 097108077, the first alignment layer 108 is formed near the surface of the liquid crystal layer 118 with a plurality of first grooves parallel to each other. a groove 1082. The second alignment layer 116 is formed with a plurality of second grooves 1162 parallel to each other near the surface of the liquid crystal layer 118. The first grooves 1082 and the second grooves 1162 are arranged perpendicular to each other, thereby forming a form No. A0I01 % 3 I/# 22 I 1003400642-0 1356250 The liquid crystal molecules 1182 in the liquid crystal layer 118 can be oriented for 10 years, that is, the liquid crystal molecules 1182 near the first trench 1 082 and the second trench 11 62 Along the first trench 1 082 and the second trench 116, respectively The orientation of 2 is oriented such that the alignment of the liquid crystal molecules 1182 is automatically rotated from top to bottom by 9 degrees. [0006] Prior art liquid crystal displays use an alignment layer material of polystyrene and its derivatives, polyimine. Polyvinyl alcohol, polyester, epoxy resin, polyurethane, polydecane, etc. The most common are polyimine. These materials are subjected to friction, oblique vapor deposition of Si〇x film method and micro-groove treatment of the film. (See Atomic-beam alignment of inorganic ina-terials for liquid-crystal displays), P.

After treatment by Chaudhari, et al., Nature, vol 411, p56 (2 0 01 )), a plurality of trenches can be formed, which can align liquid crystal molecules. [0007] Adoption in the prior art The method of preparing the alignment layer by the rubbing method mainly includes the following steps: [0008] First, an alignment material is coated on the inner surface of the second transparent electrode layer 114. The alignment material is typically selected from the group consisting of polyimine. Then, it is brushed with a flannel roller to form a plurality of minute grooves on the surface of the polyimide, thereby forming the alignment layer 116. [0009] The contact manufacturing method of the brushing of the alignment material by the flannel roller is complicated, and a large amount of static electricity is easily introduced during the operation, and the liquid crystal display using the above liquid crystal display is easy. Thin film transistor components in the screen cause damage; a large amount of dust is generated, and additional cleaning steps are required to avoid affecting the quality of the alignment layer produced. 097108077 Form No. 1010101 Page 4 of 22 Page 100400400-2-0356250

100 years. October 28th, please replace the page. Moreover, the fleece used has a limited life and needs to be replaced frequently. [0010] In view of the above, it is indeed necessary to provide a method of preparing a liquid crystal display panel having a simple preparation process. SUMMARY OF THE INVENTION [0011] A liquid crystal display screen preparation method, comprising the steps of: providing a substrate; forming a carbon nanotube layer on the surface of the substrate, the carbon nanotubes in the carbon nanotube layer Arranging in the same direction; forming a fixed layer having a thickness of 10 nm to 2 μm on the surface of the carbon nanotube layer, the fixed layer forming a plurality of grooves near the surface of the liquid crystal layer, and obtaining a first Substrate; repeating the above preparation steps to obtain a second substrate; the fixed layer is formed near the surface of the liquid crystal layer to form a plurality of trenches, the plurality of trenches constitute a first trench or a second trench; and a liquid crystal layer is disposed The liquid crystal display screen is formed between the first substrate and the fixed layer of the second substrate, and the arrangement direction of the carbon nanotubes in the carbon nanotube layer of the first substrate and the second substrate is perpendicular. [0012] Compared with the prior art, the manufacturing method of the liquid crystal display provided by the technical solution has the following advantages: First, since the carbon nanotube layer as the alignment layer itself has many uniform small gaps, thereby forming The fixed layer on the carbon nanotube layer has tiny grooves, which can align liquid crystal molecules, so that no additional process is required to make the alignment layer have 'small grooves, which reduces the fabrication cost of the alignment layer and simplifies The production process. Second, since the fixed layer covers the surface of the carbon nanotube layer, the fixed layer can better fix the carbon nanotube layer to the surface of the substrate to form an alignment layer. When the alignment layer is in contact with the liquid crystal material or does not leave when it is in contact with the outside for a long time, the alignment layer can be replaced by the fixed layer 097108077 Form No. A0101, Page 5 of 22, 1003400642-0 1356250 100.10J 28 π is well fixed to the surface of the substrate. Further, the liquid crystal display panel using the above alignment layer has better alignment quality. [Embodiment] [0013] The present technical solution will be further described in detail below with reference to the accompanying drawings. Referring to FIG. 2 and FIG. 3, the embodiment of the present invention provides a method for preparing a liquid crystal display panel 300, which mainly includes the following steps: [0015] Step 1: Provide a first substrate 322.

[0016] The material of the first substrate 322 may be formed of a transparent material, such as a hard material or a flexible material such as glass, quartz, diamond or plastic. Specifically, the material of the flexible substrate may be a flexible material such as cellulose acetate (Ce 11 u ose Triacetate, CTA). [0017] wherein, the first substrate 322 of the embodiment is a CTA substrate having a thickness of 2 mm, a width of 20 cm, and a length of 30 cm. [0018] Step 2: forming a first carbon nanotube layer 324b on the surface of the f-substrate 322, wherein the carbon nanotubes in the carbon nanotube layer are arranged in the same direction. [0019] First, a carbon nanotube array is provided, preferably the array is a super-sequential carbon nanotube array. [0020] The carbon nanotube array provided by the embodiments of the present technical solution is a single-walled carbon nanotube array, a double-walled carbon nanotube array, or a multi-walled carbon nanotube array. In this embodiment, the method for preparing the super-sequential carbon nanotube array adopts a chemical vapor deposition method, and the super-aligned carbon nanotube array is pure for a plurality of carbon nanotubes which are parallel to each other and grow perpendicular to the substrate. Nano carbon tube array. [0021] It can be understood that the carbon nanotube array provided by the embodiment is not limited to the above-mentioned system 097108077 Form No. A0101 Page 6 of 22 1003400642-0 1356250 October 28, 100, the shuttle replacement method. It can also be a graphite electrode constant current arc discharge deposition method, a laser evaporation deposition method, or the like. [0022] Next, a carbon nanotube film is obtained by drawing from a carbon nanotube array using a stretching tool. Specifically, the method comprises the following steps: (a) selecting a plurality of carbon nanotube segments or bundles of a certain width from the carbon nanotube array, and the embodiment preferably adopts a tape having a certain width to contact the carbon nanotube array to select a plurality of carbon nanotube segments or bundles of a certain width; (b) stretching the plurality of carbon nanotube segments or bundles at a rate substantially perpendicular to the growth direction of the carbon nanotube array to form a continuous nanometer Carbon tube film. [0023] During the stretching process, the plurality of carbon nanotube segments or bundles are gradually separated from the substrate in the stretching direction under the action of the tensile force, and the selected plurality of nanoparticles are selected due to the action of the van der Waals force. The carbon tube segments or bundles are continuously pulled out in conjunction with other carbon nanotube segments or bundles to form a carbon nanotube film. The arrangement direction of the carbon nanotubes in the carbon nanotube film is substantially parallel to the stretching direction of the carbon nanotube film. [0024] Further, a nanocarbon tube long line is obtained by treating the carbon nanotube film with an organic solvent or applying a mechanical external force. Specifically, the method for obtaining a long carbon nanotube line by treatment with an organic solvent specifically comprises the steps of: dropping an organic solvent on a surface of a carbon nanotube film through a test tube, and infiltrating the entire carbon nanotube film. The organic solvent is a volatile organic solvent such as ethanol, decyl alcohol, acetone, di-ethane or gas, and ethanol is preferably used in the present embodiment. After the carbon nanotube film is infiltrated by an organic solvent, the parallel carbon nanotube segments in the carbon nanotube film are partially aggregated into the carbon nanotube bundle under the surface tension of the volatile organic solvent. The carbon nanotube film shrinks into a long line of carbon nanotubes. 097108077 Form No. 1010101 Page 7 / Total 22 Page 1003400642-0 1356250. 100 years 10 start 28th shuttle replacement page The nano carbon tube long wire surface volume ratio is small, non-viscous, and has good mechanical strength and toughness, The long line of carbon nanotubes treated with organic solvents can be conveniently applied to the macroscopic field. [0025] The method for obtaining a long carbon nanotube line by applying a mechanical external force specifically includes the following steps: providing a spinning shaft whose tail portion can adhere to the carbon nanotube film. After the tail portion of the spinning shaft is bonded to the carbon nanotube film, the spinning shaft is rotated to rotate the carbon nanotube film to form a long carbon nanotube tube. The long carbon nanotube line is a stranded structure composed of a plurality of carbon nanotube bundles connected end to end. It can be understood that the above-mentioned spinning shaft is not limited in rotation, and can be rotated forward or reversed, or combined with forward rotation and reverse rotation.

Further, a mechanical external force may be applied to treat the long carbon nanotubes obtained by the drawing to form a long carbon nanotube line having a twisted wire structure. The method specifically comprises the steps of: providing a spinning shaft; combining the tail of the spinning shaft with one end of the long line of the carbon nanotube; rotating the spinning shaft in a rotating manner to form a strand having a twisted structure Long carbon pipe. It can be understood that the spinning mode of the above spinning shaft is not limited, and it can be rotated forward or reversed, or combined with forward rotation and reverse rotation. [0027] In this embodiment, the carbon nanotubes are one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube; the single-walled carbon nanotube 5纳米〜50 The direct control of the multi-walled carbon nanotubes is 1. 5 nm ~ 50, the diameter of the double-walled carbon nanotubes is 1. 0 nm ~ 50 nm, the direct control of the multi-walled carbon nanotubes is 1. 5 nm ~ 50 Nano. 097108077 Again, the above-mentioned one carbon nanotube film is laid on the substrate, the form number A0101, page 8 / total 22 pages 1003400642-0 [0028] 1356250, · October 28, 100 revised replacement page, more The carbon nanotube films are laid in parallel and without gaps in the same direction or the above-mentioned carbon nanotube long lines are closely arranged on the surface of the substrate, thereby forming a first carbon nanotube layer 324b covering the The surface of the first substrate 322. [0029] Since the nanotubes in the long line of the carbon nanotube film or the carbon nanotube are arranged in the same direction, the above-mentioned carbon nanotube film or the long carbon nanotube tube may be overlapped to form a nano carbon. For the tube layer, it is only necessary to ensure that the carbon nanotubes in the carbon nanotube layer are arranged in the same direction. [0030] Further, in order to better bond the first carbon nanotube layer 324b to the surface of the first substrate 322. In this embodiment, the first substrate 322 may be further cleaned before the first carbon nanotube layer 324b is covered on the surface of the first substrate 322. The method specifically includes the steps of: ultrasonically cleaning the first substrate 322 with an organic solvent and deionized water, respectively; and drying the first substrate 322 with a shielding gas. Preferably, the organic solvent is anhydrous ethanol, the shielding gas is nitrogen gas, and the first substrate 322 is blown dry with a nitrogen gas gun. [0031] Further, after cleaning the first substrate 322, further comprising forming a layer of adhesive (not labeled) on the surface of the first substrate 322, and the carbon nanotube film or nano carbon A long tube line is laid on the surface of the adhesive layer to form a first carbon nanotube layer 324b on the surface of the first substrate 322. [0032] Further, after the first carbon nanotube layer 324b is covered on the surface of the first substrate 322, the first carbon nanotube layer 324b may be subjected to an organic solvent treatment step. Treating the first nanocarbon 097108077 with an organic solvent Form No. A0101 Page 9 of 22 1003400642-0 1356250 100 years.103⁄4 28th 'The first carbon nanotube can be replaced after replacing the tube layer 324b Layer 324b initially adheres to the surface of the first substrate 322 or the surface of the bonding agent. Specifically, the organic solvent is a volatile organic solvent, and ethanol, decyl alcohol, acetone, dichloroethane or gas is used. The organic solvent in this embodiment is ethanol. The step of treating with an organic solvent may drop an organic solvent on the surface of the first carbon nanotube layer 324b through a test tube and infiltrate the entire first carbon nanotube layer 324b. The first substrate 322 having the first carbon nanotube layer 324b formed thereon may be entirely immersed in a container containing an organic solvent to be infiltrated. After the first carbon nanotube layer 324b is subjected to an organic solvent infiltration treatment, the parallel carbon nanotube segments 4 are partially aggregated into a carbon nanotube bundle under the action of the surface tension of the volatile organic solvent. Therefore, the first carbon nanotube layer 324b has a small surface volume ratio, is non-viscous, and has good mechanical strength and character. [0033] In the first carbon nanotube layer 324b formed of a carbon nanotube film, the carbon nanotube film includes a plurality of carbon nanotube bundle segments, each of the carbon nanotube bundle segments having substantially equal lengths and each The carbon nanotube bundle segments are composed of a plurality of mutually parallel carbon nanotube bundles, and the carbon nanotube bundle segments are connected to each other by van der Waals force. Therefore, there are a plurality of parallel and evenly distributed gaps between the plurality of carbon nanotube bundles or the carbon nanotubes in the carbon nanotube film, and the gap can be used as a fine groove for aligning the liquid crystal molecules. In the first carbon nanotube layer 324b formed by the long line of the carbon nanotubes without gaps, the plurality of carbon nanotube long lines also have a plurality of flat rods and evenly distributed gaps, which can serve as tiny grooves. The grooves are used to align liquid crystal molecules. [0034] In addition, the first nano 097108077 may be used as a transparent conductive paste or a binder. Form No. A0101 Page 10 / Total 22 pages 1003400642-0 1356250 • Η flOO year. October 28th is positive _ page A carbon official layer 324b is adhered to the surface of the first substrate 322. [0035] Step 2. Covering a first fixed layer 324a on the surface of the first carbon nanotube layer 324b to produce a first substrate 33A. [0036] wherein the material of the first pinned layer 324a may be formed of an inorganic material or an organic material. The inorganic material is hydrogenated diamond-like carbon (DLC), tantalum nitride (SiN), hydrogenation

X-shaped amorphous bismuth, strontium carbide (Sic), cerium oxide (Si〇y, alumina (A1203), cerium oxide (Ce〇2), tin oxide (Sn〇2), zinc titanate (ZnTi〇2) And the indium titanate (chemical substance such as InTi〇p, which may be deposited by vapor deposition, sputtering or plasma enhanced chemical vapor deposition (PECVI)), or the like, may be coated on the first carbon nanotube. The surface of layer 3241) forms a first pinned layer 324a having a thickness of 1 nanometer (nm) to 2 micrometers (m). In addition, the first pinned layer 324a may also be formed of an organic material, and the specific preparation steps are as follows: First, the organic powder material is dissolved in a solvent to prepare a solution. [0039] wherein, the organic powder material is polyvinyl alcohol (PVA), polyfluorene imide (pj), polymethyl methacrylate (PMMA), poly Carbonate (PC), etc. The solvent is a volatile organic solvent, and the concentration of the formulated solution is 1% by weight. Preferably, the solvent is r-butyrolactone and the organic solution is a 5% PI solution. [0040] 097108077 Next, the above solution is dropped onto the first carbon nanotube layer 32, the form number A0101, page 11 / total 22 pages 1003400642-0 1356250 _____ 100 years 10 > 28th nuclear replacement tile The surface is placed in a rubber mixer for the silicone. [0041] wherein, controlling the solution dropped onto the surface of the first carbon nanotube layer 324b, the thickness of the first pinned layer 324a finally formed on the surface of the first substrate 322 is controlled to have a thickness of 10 nm (nm). ~ 2 microns (em). The speed of the silicone machine is 1 0 0 0 ~ 8 0 0 rotations per minute (r / m i η), preferably 5 0 0 0 r / m i η . The time of silicone can be selected according to actual needs. Preferably, the silicone time is 60 seconds, and the obtained organic film has a thickness of 80 nm. Finally, the tantalum-treated first substrate 322 is heated to obtain a first substrate 322 covering the first pinned layer 324a. [0043] Further, the step of heating removes the solvent applied to the solution on the surface of the first carbon nanotube layer 324b and dries the first substrate 322. Preferably, the temperature of the first substrate 322 is heated to 2 50 ° C and the heating time is 60 seconds. It will be understood that the above heating temperature and time can be selected according to actual needs. [0044] It can be understood that there are a plurality of parallel gaps between the plurality of carbon nanotubes, the carbon nanotube bundles, and the long carbon nanotubes in the first carbon nanotube layer 324b, and the phase is formed in the above The surface of the first pinned layer 324a on the surface of the first carbon nanotube layer 324b forms a plurality of parallel first trenches 328 which can align liquid crystal molecules. The first alignment layer 324 provided in this embodiment includes a first carbon nanotube layer 324b and a first fixed layer 324a. Since the first pinned layer 324a covers the surface of the first carbon nanotube layer 324b, the first alignment layer 324 does not come off when it comes into contact with the liquid crystal material or when it is in contact with the outside for a long time. Therefore, the liquid crystal display panel 300 having the better alignment quality and using the above alignment layer also has better alignment quality. 097108077 Form No. A0101 Page 12 of 22 1003400642-0 1356250 [0045] 100 years. October 28th Shuttle replacement page Step 4: Repeat the above preparation steps to obtain a second substrate 310. Specifically, the above first to third steps are repeated, thereby forming a second substrate 302 which is sequentially covered with a second carbon nanotube layer 304b and a second fixed layer 304a as the second substrate 310. As is apparent from the description of the first substrate 330, a plurality of parallel second trenches 308 are also formed on the surface of the second pinned layer 304a adjacent to the liquid crystal layer 338, and the second trenches 308 can also align liquid crystal molecules. [0047] Step 5: providing a liquid crystal layer 338 between the first substrate 330 and the second substrate 310, and the first carbon nanotube layer 324b and the carbon nanotubes in the second carbon nanotube layer 304b The arrangement direction is vertical. [0048] First, a liquid crystal material is dropped onto the surface of the second pinned layer 304a of the second substrate 310, thereby forming a liquid crystal layer 338. In this embodiment, a liquid crystal material of a certain position is sucked by a dropper and then dropped onto the surface of the second fixed layer 304a of the second substrate 310 to form a liquid crystal layer 338 comprising a plurality of long rod-shaped liquid crystals. molecule. [0049] Next, the first fixed layer 324a of the first substrate 330 is laid next to the liquid crystal layer 338, and the arrangement direction of the carbon nanotubes of the first substrate 330 and the arrangement of the carbon nanotubes of the second substrate 310 are ensured. The direction is vertical such that the first trench 328 of the first alignment layer 324 is perpendicular to the alignment direction of the second trench 308 of the second alignment layer 304. Specifically, the first trenches 328 in the first alignment layer 324 are parallel and oriented along the X-axis direction; the second trenches 308 in the second alignment layer 304 are parallel and oriented along the Z-axis direction, thereby forming a The liquid crystal display 300. Further, the periphery of the first substrate 330 and the second substrate 310 may be sealed with a sealant. In this embodiment, the seal is 1003400642-0 097108077 Form No. A0101 Page 13 of 22 1356250 100 Year 10> 28th Misplaced Replacement Page The glue is vulcanized rubber 706B. [0050] It can be understood that in order to maintain the spacing between the first substrate 330 and the second substrate 310, a plurality of transparent spacers (not shown) may be disposed between the first substrate 330 and the second substrate 310. The material and size of the spacers can be selected according to actual needs. In this embodiment, a polyethylene (PE) pellet of 1 to 10 μm is ultrasonically dispersed in absolute ethanol, and a small amount of the above solution is taken up by a pipette and dropped on the surface of the second fixed layer 304a of the second substrate 310. After the ethanol is volatilized, the remaining PE beads will act as spacers. [0051] It can be understood that in order to make the liquid crystal display panel 300 have a better polarization effect, at least one polarizing plate (not shown) may be disposed on the surface of the first substrate 330 and/or the second substrate 310 away from the liquid crystal layer 338.

[0052] The preparation method of the liquid crystal display panel 300 provided by the technical solution has the following advantages: First, since the carbon nanotube layer as the alignment layer itself has many uniform small gaps, so that it is formed on the carbon nanotube layer. The fixed layer has micro-trench which can align liquid crystal molecules, so that no additional process is required to make the alignment layer have micro-grooves, which reduces the fabrication cost of the alignment layer and simplifies the fabrication process. Second, since the fixed layer covers the surface of the carbon nanotube layer, the fixed layer can better fix the carbon nanotube layer to the surface of the substrate to form an alignment layer. When the alignment layer is in contact with the liquid crystal material or does not leave when it is in contact with the outside for a long time, the alignment layer can be preferably fixed to the surface of the substrate by the fixing layer. Further, the liquid crystal display panel using the above alignment layer has better alignment quality. 097108077 Form No. A0101 Page 14 of 22 1003400642-0 1356250, October 28, 100, according to the replacement page [0053] In summary, the present invention has indeed met the requirements of the invention patent, and filed a patent application according to law. . However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art to the spirit of the invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a prior art liquid crystal display. [0055] FIG. 2 is a flow chart showing a method of fabricating a liquid crystal display panel according to an embodiment of the present technology. 3 is a schematic structural view of a liquid crystal display panel obtained according to an embodiment of the present application. [Explanation of main component symbols] Liquid crystal display: 100, 300 [0058] First polarizer: 102 [0059] First substrate: 104, 322 φ [0060] First transparent electrode layer: 106. [0061] First alignment layer: 108, 324 '[0062] First trench: 1 082, 328 '[0063] Second polarizer: 110 [0064] Second substrate: 112, 302 [0065] Second transparent electrode layer: 114 [0066] Second alignment layer: 116, 304 • 097108077 Form number A0101 Page 15 of 22 1003400642-0 1356250 ________ 100 years 10> 28th nuclear replacement page [0067] Second trench: 1162,308 Liquid crystal layer: 118, 338 [0069] Liquid crystal molecule: 1182 [0070] Second pinned layer: 304a [0071] Second carbon nanotube layer: 304b [0072] Second substrate: 310 [0073] Fixed layer: 324a

I

[0074] First carbon nanotube layer: 324b '[0075] 'First substrate: 330

1003400642-0 097108077 Form No. A0101 Page 16 of 22

Claims (1)

100 years. October 28th revised replacement page 1356250. > 7. Patent application scope: 1. A method for preparing a liquid crystal display panel, comprising the steps of: providing a substrate; forming a carbon nanotube layer on the substrate Surface, the carbon nanotubes in the carbon nanotube layer are arranged in the same direction; forming a fixed layer having a thickness of 10 nm to 2 μm on the surface of the carbon nanotube layer, the fixed layer being close to the liquid crystal layer Forming a plurality of trenches on the surface to form a first substrate; repeating the above-mentioned preparation steps to obtain a second substrate; the fixed layer forming a plurality of trenches near the surface of the liquid crystal layer, the plurality of trenches forming a a trench or a second trench; a liquid crystal layer disposed between the first substrate and the fixed layer of the second substrate, and the carbon nanotubes in the carbon nanotube layer of the first substrate and the second substrate The alignment direction is vertical to form the liquid crystal display. 2. The method for preparing a liquid crystal display according to claim 1, wherein the forming the carbon nanotube layer on the surface of the substrate comprises the steps of: providing a carbon nanotube array; A stretching tool is taken from the carbon nanotube array to obtain a carbon nanotube film; a carbon nanotube film is laid in the same direction, and the plurality of carbon nanotube films are laid or overlapped in parallel without gaps. The surface of the substrate is described to obtain a carbon nanotube layer. 3. The method for preparing a liquid crystal display according to claim 2, further comprising: processing the obtained carbon nanotube film by using an organic solvent to form a long carbon nanotube line; The carbon nanotube long line is closely arranged on the surface of the substrate to obtain a carbon nanotube layer. 4. The method for preparing a liquid crystal display according to claim 3, wherein the 097108077 form number A0101 page 17/22 pages 1003400642-0 1356250 100 years 10> 28 0 correction replacement page further includes the use of machinery The step of treating the carbon nanotube film or the carbon nanotube long line with an external force to form a long carbon nanotube having a twisted wire structure. 5. The method of preparing a liquid crystal display according to claim 4, wherein the mechanical external force processing comprises the steps of: providing a spinning shaft; and the tail of the spinning shaft and the carbon nanotube One end of the structure or the organic solvent-treated carbon nanotube structure is combined; the spinning shaft is spun out in a rotating manner. 6. The method of preparing a liquid crystal display according to claim 1, wherein the step of forming the carbon nanotube layer on the surface of the substrate further comprises the step of pre-cleaning the surface of the substrate, This step specifically includes the following steps: ultrasonically cleaning the substrate with an organic solvent and deionized water, respectively: drying the substrate with a shielding gas. 7. The method of preparing a liquid crystal display according to claim 6, further comprising forming a layer of a binder on a surface of the substrate, and forming the layer of carbon nanotubes on the binder. The step of the surface of the layer. The method for producing a liquid crystal display according to claim 1, wherein the step of forming a carbon nanotube layer on the surface of the substrate further comprises treating the nanoparticle with an organic solvent. The step of the carbon tube layer. The method for preparing a liquid crystal display according to claim 1, wherein the material of the fixing layer is hydrogenated diamond-like carbon, aromatized fossil, hydrogenated amorphous yttrium, niobium carbide, and oxidized. Antimony, aluminum oxide, antimony oxide, tin oxide, zinc titanate or indium titanate. The method for producing a liquid crystal display according to claim 9, wherein the method for preparing the fixed layer comprises an evaporation method, a sputtering method, or a plasma enhanced chemical vapor deposition method. 11. The method for preparing a liquid crystal display according to claim 1, wherein 097108077 Form No. A0101 Page 18 of 22 1003400642-0 1356250 12 '100. October 28th Nuclear Replacement Page The material of the fixing layer is an organic material, which is polyvinyl alcohol, polyimine, polymethyl methacrylate or polycarbonate. The method for preparing a liquid crystal display according to claim 11, wherein the method for preparing the fixed layer comprises the steps of: dissolving an organic material in a solvent to form a solution; and dropping the solution onto the coating solution. The surface of the substrate covered with the carbon nanotube layer is placed in a rubberizing machine for the silicone; and the substrate after the silicone treatment is heated to form a fixed layer on the surface of the carbon nanotube layer. The method for preparing a liquid crystal display according to claim 1, wherein the process of providing a liquid crystal layer between the first substrate and the second substrate comprises: The liquid crystal material is dropped onto the surface of the fixed layer of the second substrate; the fixed layer covering the first substrate is on the surface of the liquid crystal layer. The method for fabricating a liquid crystal display according to claim 13, wherein before the process of disposing the liquid crystal layer between the first substrate and the second substrate, further comprising providing a plurality of transparent spacers a step of the surface of the two substrates, the step specifically comprising the steps of: ultrasonically dispersing a polyethylene sphere of 1 to 10 micrometers in anhydrous ethanol; drawing a small amount of the above solution with a pipette; # and dropping the fixed layer of the second substrate surface. The method for preparing a liquid crystal display according to claim 1, wherein after the liquid crystal layer is disposed between the first substrate and the second substrate, the method further comprises sealing the first with a sealant. The steps of the periphery of the substrate and the second substrate. 097108077 Form No. A0101 Page 19 of 22 1003400642-0