Method for manufacturing liquid crystal display panel

Abstract

To provide a method capable of manufacturing a high quality liquid crystal display panel at low consumption energy.SOLUTION: A method for manufacturing a liquid crystal display panel including a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates and a frame-like sealing material arranged between the pair of substrates and sealing the liquid crystal layer, comprises steps of: preparing a liquid crystal sealant cured at the normal temperature by mixing a plurality of agents; applying the mixture of the plurality of agents on one of the pair of substrates to form a frame-like sealing pattern; dropping a liquid crystal material in the inside of the frame-like sealing pattern on the one substrate and / or on the other of the pair of substrates; bonding the pair of substrates through the liquid crystal material in a reduced pressure atmosphere; and curing the frame-like sealing pattern at the normal temperature.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a liquid crystal display panel and a method for manufacturing the same. [Background technology]

[0002] A liquid crystal display panel usually has a pair of substrates, a frame-shaped sealant disposed between the substrates, and a liquid crystal material sealed within the area surrounded by the sealant. One method for manufacturing such a liquid crystal display panel is a liquid crystal dropping method.

[0003] In the liquid crystal dropping method, a liquid crystal sealant is applied to one of a pair of substrates by a dispense method to prepare a rectangular frame-shaped sealing pattern. Next, while the liquid crystal sealant is in an uncured state, a liquid crystal material is dropped into the frame-shaped sealing pattern and / or into the corresponding area of ​​the other substrate. Then, the substrates are bonded together under vacuum, and the frame-shaped sealing pattern is irradiated with light such as ultraviolet light to perform provisional curing. After that, the substrate is heated to perform main curing, and a liquid crystal display panel is prepared. As the liquid crystal sealant for such liquid crystal display panels, many resin compositions containing a photocurable resin, a thermosetting resin, a photopolymerization initiator, and a thermosetting agent are known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-102912 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, there has been a demand for manufacturing various products with low energy consumption in consideration of the environment, such as through decarbonization, and there is also a demand for liquid crystal display panels to be manufactured with even lower energy consumption.

[0006] As an aid in reducing power consumption during the manufacture of liquid crystal display panels, it is conceivable to omit the light curing and heat curing steps of the liquid crystal sealant in the liquid crystal dropping method. However, various properties are required for the sealant of liquid crystal display panels, such as moisture resistance, sufficient adhesive strength, and incompatibility with liquid crystal materials. For this reason, it is difficult to omit the light irradiation and heat curing steps, and in reality, omitting these steps has not been much considered until now.

[0007] The present invention has been made in view of the above problems, and specifically, an object of the present invention is to provide a method for manufacturing a liquid crystal display panel that can manufacture a high-quality liquid crystal display panel with low energy consumption. [Means for solving the problem]

[0008] The present invention provides a method for manufacturing a liquid crystal display panel having a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates, and a frame-shaped sealing material disposed between the pair of substrates for sealing the liquid crystal layer, the method including the steps of: preparing a liquid crystal sealant containing multiple agents and curing at room temperature by mixing the multiple agents; applying the mixture of the multiple agents onto one of the pair of substrates to form a frame-shaped sealing pattern; dripping a liquid crystal material inside the frame-shaped sealing pattern of the one substrate and / or onto the other substrate of the pair of substrates; bonding the pair of substrates together via the liquid crystal material under a reduced pressure atmosphere; and curing the frame-shaped sealing pattern at room temperature. Effect of the Invention

[0009] According to the method for manufacturing a liquid crystal display panel of the present invention, it is possible to manufacture a high-quality liquid crystal display panel with low energy consumption. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In this specification, a numerical range expressed using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits.

[0011] The present invention relates to a method for manufacturing a liquid crystal display panel having a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates, and a frame-shaped sealant disposed between the pair of substrates for sealing the liquid crystal layer.

[0012] As described above, in the conventional liquid crystal display panel manufacturing method using the liquid crystal dropping method, after the application of the liquid crystal sealant, the liquid crystal sealant is generally photocured or heat cured to obtain a sealant. In contrast, in the present invention, a liquid crystal sealant containing a plurality of agents and cured at room temperature by mixing these is used. In this specification, "cured at room temperature by mixing a plurality of agents" means that by mixing a plurality of agents, the components in the plurality of agents interact with each other to initiate a curing reaction, and the sealant is cured without applying light energy or heat energy from the outside. In the manufacturing method of the present invention, because such a liquid crystal sealant is used, light irradiation or heating is substantially unnecessary when the liquid crystal sealant is cured, and the liquid phase sealant can be reliably cured. In other words, a high-quality liquid crystal display panel can be manufactured with low energy consumption. In addition, by using the liquid crystal sealant, there is an advantage that investment in equipment such as a light irradiation device or a heating device is not required. Furthermore, there is an advantage that it is possible to form a sealant at a position where it was previously difficult to form a sealant by light irradiation due to shielding by a black matrix or the like.

[0013] In a specific manufacturing method of the liquid crystal display panel according to the present invention, the following steps are performed: preparing a liquid crystal sealant containing a plurality of agents (hereinafter, also referred to as a "liquid crystal sealant preparation step"); applying a mixture of the above-mentioned plurality of agents onto one of a pair of substrates to form a frame-shaped sealing pattern (hereinafter, also referred to as a "frame-shaped sealing pattern formation step"); dripping a liquid crystal material onto the inside of the frame-shaped sealing pattern of the one substrate and / or onto the other substrate of the pair of substrates (hereinafter, also referred to as a "liquid crystal material dripping step"); bonding the pair of substrates together via the liquid crystal material under a reduced pressure atmosphere (hereinafter, also referred to as a "bonding step"); and curing the frame-shaped sealing pattern at room temperature (hereinafter, also referred to as a "room temperature curing step"). In this step, the bonding step is preferably performed while the liquid crystal sealant (frame-shaped sealing pattern) is provisionally cured. In this specification, the term "temporarily cured" refers to a state in which the liquid crystal sealant is not completely cured, and the liquid crystal sealant has a complex viscosity of 1.0×10 when measured at 25° C. and a thickness of 0.5 mm using a thermal rheometer. 4 The complex viscosity in this specification is a value measured using a HAAKE MARS III or the like at a frequency of 0.3 to 0.8 Hz.

[0014] Each step of the method for producing a liquid crystal display panel of the present invention will be described in detail below.

[0015] (1) Liquid crystal sealant preparation process In this process, a liquid crystal sealant that contains multiple agents and is cured at room temperature by mixing them is prepared. At least one of the multiple agents may be liquid, and the remaining agents may be solid or liquid. However, if all of the multiple agents are liquid, they are easily mixed uniformly. In addition, the number of multiple agents is not particularly limited, and may be three or more, but from the viewpoint of mixing efficiency, two agents are preferable, and it is more preferable that all of them are liquid, that is, a two-liquid type.

[0016] Here, the liquid crystal sealant preferably contains an epoxy compound having one or more epoxy groups in the molecule, and a (meth)acrylic compound having one or more (meth)acryloyloxy groups in the molecule, in either one of the agents. The (meth)acrylic compound is polymerized by radical polymerization. Therefore, in the liquid crystal sealant containing the (meth)acrylic compound, the (meth)acrylic compound can be cured at a relatively early stage after application. As a result, the shape of the frame-shaped sealing pattern can be maintained until the frame-shaped sealing pattern is completely cured, and it is easy to form a sealing material with a desired line width and height. On the other hand, the epoxy compound cures relatively slowly. Therefore, when the liquid crystal sealant contains an epoxy compound, the above-mentioned provisional curing time can be sufficiently secured, and the lamination process described later can be easily performed during provisional curing of the liquid crystal sealant (frame-shaped sealing pattern). In addition, when the liquid crystal sealant contains an epoxy compound, there is also an advantage that the adhesive strength of the obtained sealing material is easily increased.

[0017] Here, an example of the liquid crystal sealant containing the epoxy compound and the (meth)acrylic compound is a liquid crystal sealant containing a first agent containing an epoxy compound, a (meth)acrylic compound, and a peroxide, and a second agent containing an amine-based curing agent and a reducing agent. In this liquid crystal sealant, when the first agent and the second agent are mixed, the epoxy compound in the first agent is cured by the amine-based curing agent in the second agent. Meanwhile, the peroxide in the first agent reacts with the reducing agent in the second agent to generate radicals. Then, the radicals initiate polymerization of the (meth)acrylic compound in the first agent, and the (meth)acrylic compound is cured.

[0018] In the liquid crystal sealant, the time from mixing the first agent and the second agent to the temporary curing can be adjusted by the amount of organic peroxide and reducing agent and the ratio thereof. Specifically, the time can be adjusted to about 5 to 15 minutes. Each component of the liquid crystal sealant including the first agent and the second agent will be described below, but the liquid crystal sealant that can be used in the manufacturing method of the liquid crystal display panel of the present invention is not limited to the liquid crystal sealant of the above composition.

[0019] (Ingredients of the first agent) Epoxy compounds The epoxy compound may be a compound having one or more epoxy groups in the molecule. The first agent may contain only one type of epoxy compound, or may contain two or more types. The number of epoxy groups contained in one molecule of the epoxy compound may be one or two or more, but two or more is preferable from the viewpoint of the curing property of the liquid crystal sealant. The epoxy compound reacts with an amine-based curing agent described later and cures. Examples of the epoxy compound include known aromatic epoxy compounds, aliphatic epoxy compounds, and alicyclic epoxy compounds. Among these, aromatic epoxy compounds are preferred from the viewpoint of easily realizing low moisture permeability of the resulting sealant.

[0020] Examples of aromatic epoxy compounds include aromatic diols such as bisphenol A, bisphenol S, bisphenol F, bisphenol AD, etc., and diols obtained by modifying these aromatic diols with ethylene glycol, propylene glycol, alkylene glycol, etc., and aromatic polyhydric glycidyl ether compounds obtained by reacting epichlorohydrin with them; novolak resins derived from phenol or cresol and formaldehyde, novolak-type polyhydric glycidyl ether compounds obtained by reacting polyphenols such as polyalkenylphenols and their copolymers, etc., and epichlorohydrin; and glycidyl ether compounds of xylylene phenol resins.

[0021] Among aromatic epoxy compounds, cresol novolac type epoxy compounds, phenol novolac type epoxy compounds, bisphenol A type epoxy compounds, bisphenol F type epoxy compounds, triphenol methane type epoxy compounds, triphenol ethane type epoxy compounds, trisphenol type epoxy compounds, dicyclopentadiene type epoxy compounds, diphenyl ether type epoxy compounds, and biphenyl type epoxy compounds are preferred.

[0022] Here, the epoxy compound may be liquid or solid, but is preferably liquid from the viewpoint of reducing the viscosity of the first agent and increasing the compatibility with the second agent (particularly the amine-based curing agent). The weight-average molecular weight of the epoxy compound is preferably 500 to 10,000, more preferably 1,000 to 5,000. The weight-average molecular weight of the epoxy compound is measured in terms of polystyrene by gel permeation chromatography (GPC).

[0023] The total amount of the epoxy-based compound is preferably 30% by mass or more and 70% by mass or less, more preferably 35% by mass or more and 65% by mass or less, based on the total amount of the mixture of the first and second agents, i.e., the total amount of the liquid crystal sealant. When the amount of the epoxy-based compound is within this range, the moisture permeability of the resulting sealant is easily reduced.

[0024] (Meth)acrylic compounds The (meth)acrylic compound may be a compound having one or more (meth)acryloyloxy groups in the molecule. The first agent may contain only one type of the (meth)acrylic compound, or may contain two or more types. The number of (meth)acryloyloxy groups contained in one molecule of the (meth)acrylic compound may be one or two or more, but two or more is preferable from the viewpoint of curability.

[0025] Examples of the (meth)acrylic compound containing one (meth)acryloyl group in one molecule include (meth)acrylic acid alkyl esters such as methyl (meth)acrylate, ethyl (meth)acrylate, and 2-hydroxyethyl (meth)acrylate.

[0026] Examples of (meth)acrylic compounds having two or more (meth)acryloyl groups in one molecule include di(meth)acrylates derived from polyethylene glycol, propylene glycol, polypropylene glycol, etc.; di(meth)acrylates derived from tris(2-hydroxyethyl)isocyanurate: di(meth)acrylates derived from a diol obtained by adding 4 or more moles of ethylene oxide or propylene oxide to 1 mole of neopentyl glycol; di(meth)acrylates (bisphenol A or F type epoxy(meth)acrylates) derived from a diol obtained by adding 2 moles of ethylene oxide or propylene oxide to 1 mole of bisphenol A or bisphenol F; di- or tri(meth)acrylates derived from a polyol obtained by adding 2 or 3 moles of ethylene oxide or propylene oxide to 1 mole of trimethylolpropane; di(meth)acrylates derived from a diol obtained by adding 4 or more moles of ethylene oxide or propylene oxide to 1 mole of bisphenol A; tris( 2-Hydroxyethyl)isocyanurate tri(meth)acrylate;Trimethylolpropane tri(meth)acrylate or its oligomer;Pentaerythritol tri(meth)acrylate or its oligomer;Poly(meth)acrylate of dipentaerythritol;Tris(acryloxyethyl)isocyanurate;Caprolactone modified tris(acryloxyethyl)isocyanurate;Caprolactone modified tris(methacryloxyethyl)isocyanurate;Poly(meth)acrylate of alkyl-modified dipentaerythritol poly(meth)acrylate of caprolactone-modified dipentaerythritol; hydroxypivalic acid neopentyl glycol di(meth)acrylate; caprolactone-modified hydroxypivalic acid neopentyl glycol di(meth)acrylate; ethylene oxide-modified phosphate (meth)acrylate; ethylene oxide-modified alkylated phosphate (meth)acrylate; and oligo(meth)acrylate of neopentyl glycol, trimethylolpropane, and pentaerythritol.Among these, di(meth)acrylates derived from diols obtained by adding 2 moles of ethylene oxide or propylene oxide to 1 mole of bisphenol A or bisphenol F (bisphenol A or F type epoxy(meth)acrylates) are preferred.

[0027] The weight average molecular weight of the (meth)acrylic compound measured by gel permeation chromatography (GPC) is preferably from 200 to 10,000, and more preferably from 200 to 5,000.

[0028] The weight average molecular weight of the (meth)acrylic compound is preferably about 310 to 1000. The weight average molecular weight is a value measured, for example, by gel permeation chromatography (GPC) in terms of polystyrene.

[0029] Here, the total amount of the (meth)acrylic compound is preferably 5% by mass or more and 40% by mass or less, more preferably 10% by mass or more and 35% by mass or less, based on the total amount of the mixture of the first agent and the second agent, i.e., the total amount of the liquid crystal sealant. When the total amount of the (meth)acrylic compound is within this range, the temporary curing time is easily adjusted to a desired range. In addition, when the total amount of the (meth)acrylic compound is within this range, the adhesive strength and shape stability of the obtained sealant tend to be further improved.

[0030] Peroxide The peroxide may be any compound capable of generating radicals by being reduced by a reducing agent in the second agent described below. The first agent may contain only one type of peroxide, or may contain two or more types.

[0031] Examples of peroxides include hydroperoxides such as cumene hydroperoxide, t-butyl hydroperoxide, p-menthane hydroperoxide, cumene hydroperoxide, and diisopropylbenzene hydroperoxide; peroxy esters such as t-butyl peroxylaurate, t-butyl peroxybenzoate, and t-butyl peroxy dodecanoate; peroxy ketals such as 1,5-di-t-butylperoxy-3,3,5-trimethylcyclohexane; ketone peroxides such as ethyl acetoacetate peroxide; and diacyl peroxides such as benzoyl peroxide.

[0032] The amount of the peroxide is preferably 1% by mass or more and 10% by mass or less, more preferably 2% by mass or more and 7% by mass or less, based on the total amount of the mixture of the first agent and the second agent, i.e., the total amount of the liquid crystal sealant. When the amount of the peroxide is within this range, it becomes easier to keep the provisional curing time within a desired range.

[0033] (Second agent) Amine-based hardener The amine-based curing agent may be any compound capable of reacting with the epoxy-based compound in the first agent to crosslink the epoxy-based compound. The second agent may contain only one type of amine-based curing agent, or may contain two or more types.

[0034] Examples of amine-based curing agents include aliphatic amines such as ethylenediamine, diethylenetriamine, triethylenetetramine, and trimethylolpropane tris[poly(propylene glycol), amine-terminated]ether; alicyclic amines such as isophoronediamine, 1,3-bisaminomethylcyclohexane, and 2,2'-dimethyl-4,4'-methylenebis(cyclohexylamine); aromatic amines such as diaminodiphenylmethane and diaminodiphenylsulfone; secondary amines or tertiary amines such as linear diamines, tetramethylguanidine, triethanolamine, piperidine, pyridine, and benzyldimethylamine; and polyamidoamines obtained by reacting dimer acids with polyamines such as diethylenetriamine and triethylenetetramine.

[0035] The amount of the amine-based curing agent is preferably 3 parts by mass or more and 20 parts by mass or less, more preferably 5 parts by mass or more and 15 parts by mass or less, relative to 100 parts by mass of the epoxy-based compound. When the amount of the amine-based curing agent is within this range, the epoxy-based compound can be sufficiently cured.

[0036] Reducing agent The reducing agent may be any compound capable of reacting with the above-mentioned peroxide to generate the peroxide. The second agent may contain only one type of reducing agent, or may contain two or more types. Examples of the reducing agent include tertiary amines, thiourea derivatives, and transition metal salts. The reducing agent may be used alone or in combination of two or more types.

[0037] Examples of tertiary amines include triethylamine, tripropylamine, tributylamine, and N,N-dimethyl-p-toluidine. Examples of thiourea derivatives include 2-mercaptobenzimidazole, methylthiourea, dibutylthiourea, ethylenethiourea, acetyl-2-thiourea, benzoylthiourea, N,N-diphenylthiourea, N,N-diethylthiourea, N,N-dibutylthiourea, tetramethylthiourea, and the like. Examples of the transition metal salt include transition metal naphthenates (such as cobalt naphthenate, manganese naphthenate, and copper naphthenate), vanadyl acetylacetonate, and the like.

[0038] The amount of the reducing agent is preferably 50 parts by mass or more and 120 parts by mass or less, and more preferably 65 parts by mass or more and 105 parts by mass or less, relative to 100 parts by mass of the above-mentioned peroxide. When the amount of the reducing agent is within this range, radicals can be generated sufficiently to efficiently radically polymerize the (meth)acrylic compound.

[0039] (others) The first and second parts of the liquid crystal sealant may further contain other components, such as a filler, a silane coupling agent, and various additives, if necessary.

[0040] (2) Frame-shaped sealing pattern formation process In the frame-shaped sealing pattern forming step, a plurality of the above-mentioned liquid crystal sealants are mixed, and the mixture is applied onto one of the pair of substrates to form a frame-shaped sealing pattern.

[0041] The pair of substrates is usually a display substrate and an opposing substrate, each of which has a matrix-shaped TFT, a color filter, a black matrix, and an alignment film disposed on a transparent substrate. The transparent substrate may be made of an inorganic material such as glass, or a plastic material such as polycarbonate, polyethylene terephthalate, polyethersulfone, or PMMA. The matrix-shaped TFT, color filter, black matrix, alignment film, and the like are the same as those of known liquid crystal display panels.

[0042] Here, the method of mixing the above-mentioned multiple agents is not particularly limited, and as long as they can be mixed uniformly at a predetermined ratio, they can be mixed by a known method. Also, although all the agents (for example, all of the above-mentioned first liquid and all of the second liquid) may be mixed at once, it is preferable to mix the multiple agents in small amounts and apply them. This makes it possible to prevent the liquid crystal sealant from hardening in the application device, and to stably apply the liquid crystal sealant to a desired width. Also, it is preferable to apply the multiple agents immediately after mixing. Therefore, it is preferable to apply the multiple agents in small amounts and mix them.

[0043] An example of such a coating device is a device having a holding section that holds multiple agents independently, a mixing section that mixes them in fixed amounts, and a discharge section for coating the mixture (liquid crystal sealant) immediately after mixing. An example of such a coating device having a holding section, a mixing section, and a discharge section includes a two-liquid dispenser manufactured by Musashi Engineering Co., Ltd.

[0044] Here, the application pattern of the liquid crystal sealant, that is, the line width and height of the frame-shaped sealing pattern to be formed, the size of the frame, etc. are appropriately selected according to the desired structure of the liquid crystal display panel.

[0045] Regarding the timing of performing the frame-shaped sealing pattern forming step, when the liquid crystal material is dropped inside the frame-shaped sealing pattern in the liquid crystal material dropping step described later, the frame-shaped sealing pattern forming step must be performed before the liquid crystal material dropping step. On the other hand, when the liquid crystal material is dropped on the other substrate side (the substrate on the side on which the frame-shaped sealing pattern is not formed) in the liquid crystal material dropping step described later, the frame-shaped sealing pattern forming step may be performed simultaneously with the liquid crystal material dropping step or after the liquid crystal material dropping step.

[0046] (3) Liquid crystal material dropping process In the liquid crystal material dropping step, the liquid crystal material is dropped inside the frame-shaped sealing pattern of the substrate on which the frame-shaped sealing pattern is formed, and / or onto the other substrate. When dropping the liquid crystal onto the other substrate, the liquid crystal is dropped so that the liquid crystal fits inside the frame-shaped sealing pattern when the pair of substrates are opposed to each other in the bonding step described below. The method of dropping the liquid crystal is not particularly limited and may be the same as a known method.

[0047] (4) Bonding process In this step, one substrate and the other substrate are bonded together via the liquid crystal material and the frame-shaped sealing pattern under a reduced pressure atmosphere. This bonding step is preferably performed before the provisional curing of the frame-shaped sealing pattern (liquid crystal sealant) is completed. More specifically, when the complex viscosity of the liquid crystal sealant measured by a thermal rheometer is 1.0×10 4 It is preferable to carry out the lamination step in a state where the complex viscosity is 1.0×10 3 It is more preferable to carry out the lamination step in a state where the complex viscosity is 1.0×10 or less. By carrying out the lamination before the provisional curing of the liquid crystal sealant is completed, it is possible to reliably bond the pair of substrates. 1 It is preferable to carry out the procedure under conditions where the viscosity is at least 1.0×10 Pa s. 2It is more preferable to carry out the bonding process in a state where the viscosity is equal to or higher than Pa·s. Note that the bonding process is preferably carried out within 30 minutes, and more preferably within 15 minutes, from the mixing of the multiple liquid crystal sealants in the above-mentioned frame-shaped sealing pattern.

[0048] (5)Curing process In this process, the frame-shaped sealing pattern is cured at room temperature. In this specification, the term "cured at room temperature" refers to naturally curing the liquid crystal sealant by leaving it at room temperature without substantially performing heating with a heating device or irradiating light with a light irradiating device. In the above-mentioned liquid crystal sealant, curing proceeds sufficiently by mixing. Therefore, it is possible to cure the liquid crystal sealant without irradiating light or heating, and there is no need to invest in equipment for a heating device or a light irradiating device.

[0049] The curing time at room temperature is appropriately selected depending on the type of liquid crystal sealant, but is usually preferably from 12 hours to 48 hours, more preferably from 20 hours to 40 hours. [Industrial Applicability]

[0050] INDUSTRIAL APPLICABILITY According to the present invention, it is possible to manufacture a high-quality liquid crystal display panel with low energy consumption while being environmentally friendly, and therefore the present invention is extremely useful in the field of liquid crystal display panel manufacturing.

Claims

1. A method for manufacturing a liquid crystal display panel having a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates, and a frame-shaped sealant disposed between the pair of substrates for sealing the liquid crystal layer, comprising: A step of preparing a liquid crystal sealant that contains a plurality of agents and is cured at room temperature by mixing the plurality of agents; applying the mixture of the plurality of agents onto one of the pair of substrates to form a frame-shaped sealing pattern; Dropping a liquid crystal material onto the inside of the frame-shaped sealing pattern of the one substrate and / or onto the other substrate of the pair of substrates; bonding the pair of substrates together with the liquid crystal material therebetween under a reduced pressure atmosphere; curing the frame-shaped sealing pattern at room temperature; Including, A method for manufacturing a liquid crystal display panel.

2. In the step of forming the frame-shaped sealing pattern, the plurality of agents are mixed and applied. A method for manufacturing the liquid crystal display panel according to claim 1.

3. The liquid crystal sealant is a first agent including an epoxy compound having one or more epoxy groups in the molecule, a (meth)acrylic compound having one or more acryloyloxy groups in the molecule, and a peroxide; a second agent including an amine-based curing agent and a reducing agent; Including, A method for manufacturing the liquid crystal display panel according to claim 1.

4. In the step of bonding the pair of substrates, the liquid crystal sealant has a complex viscosity of 1.0×10 when measured at 25° C. and a thickness of 0.5 mm using a thermal rheometer. ４ This is performed in a state where the viscosity is less than Pa·s. A method for manufacturing the liquid crystal display panel according to claim 1.