JPH05289037A - Manufacture of liquid crystal display element - Google Patents

Abstract

PURPOSE:To provide the manufacturing method for a liquid crystal display element which can inject easily a liquid crystal in a short time into a cavity of a liquid crystal display element cell. CONSTITUTION:According to this manufacturing method for a liquid crystal display element, two pieces of substrates 18 provided with a liquid crystal driving electrode and an oriented film are formed integrally so that each oriented film is opposed to each other, and also, a cavity and a liquid crystal injecting port 28 for enclosing a liquid crystal are formed between the oriented films, and the liquid crystal is injected into a liquid crystal display element cell formed by providing a panel temperature control heater 22 on the whole surface, while heating the liquid crystal display element cell by allowing a current to flow to the panel temperature control heater 22. Also, according to this manufacturing method for the liquid crystal display element, this panel temperature control heater 22 is divided, and at the time of injecting the liquid crystal, the liquid crystal is injected to the tip part of the liquid crystal, while imparting successively heat from a heater unit of the cirresponding part by allowing it to interlock with a movement of the tip part of the liquid crystal in the cavity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display element, which can easily inject liquid crystal into the voids of a cell for a liquid crystal display element in a short time so that no bubbles remain.

[0002]

2. Description of the Related Art Liquid crystal display elements conventionally used for watches, televisions, personal computer displays, etc. are basically
Two transparent substrates provided with at least a transparent electrode and an alignment film on one side are arranged so that the alignment films face each other,
It has a structure in which liquid crystal is filled in the voids between the alignment films. Although various liquid crystals are used as the liquid crystal, recently, a ferroelectric liquid crystal having a high-speed response is expected.

In the process of manufacturing a liquid crystal display element, as a method of injecting liquid crystal into the voids of a cell for liquid crystal display element (hereinafter sometimes simply referred to as "cell"), a method utilizing a capillary phenomenon, in vacuum The method of injecting, the method of using both in combination, etc. are used. The cell gap for injecting liquid crystal is generally 1 to
The size is as small as 4 μm, and when the substrate is large, there are problems that the injection time is long and bubbles remain in the liquid crystal display element because the viscosity of the liquid crystal is high.

In order to solve such a problem, the cell is heated when the liquid crystal is injected into the cell. As a method of heating a cell at the time of injecting liquid crystal, Japanese Patent Laid-Open No. 61-166519 discloses a method of sandwiching a cell and a plate heater and heating the cell with a plate heater. However, this method is expensive because it uses a dedicated plate-shaped heater, the assembly work of the cell and the plate-shaped heater is complicated, the temperature distribution of the cell becomes non-uniform and bubbles easily form, and the thermal efficiency is high. There are problems such as low.

Further, Japanese Patent Laid-Open No. 62-91915 discloses a method of heating the vicinity of the liquid crystal injection tip with the movement of the liquid crystal injection tip in the empty cell container from the outside of the cell by a heater or an infrared lamp. It is disclosed. However, this method also moves with the movement of the liquid crystal injection tip.
Since a movable device for moving the heater or the infrared lamp is required, the liquid crystal injection device becomes complicated and large, and the thermal efficiency is low.

Further, in Japanese Patent Laid-Open No. 1-300223, the liquid crystal driving electrode terminals are provided so as to be exposed at both ends of the substrate, and an alternating current is passed through the liquid crystal driving electrodes through the terminals while the liquid crystal is being driven. A method of causing the driving electrode to generate heat and injecting liquid crystal is disclosed. This method seems to have good thermal efficiency, but since the liquid crystal driving electrode is also used for heating, the electrode connection becomes complicated and only the liquid crystal driving electrode portion, that is, the pixel portion is heated. Therefore, there is a problem in that the liquid crystal does not always move smoothly during injection.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a liquid crystal display device, which can easily inject a liquid crystal into a void of a cell for a liquid crystal display device in a short time so that no bubbles remain. It is in.

[0008]

The present invention (first invention) is
Two of the substrates provided with the liquid crystal drive electrode and the alignment film,
The alignment films are integrated so that they face each other and a space for enclosing the liquid crystal between the alignment films and a liquid crystal injection port are formed,
While heating the liquid crystal display element cell by passing a current through the panel temperature adjustment heater to the liquid crystal display element cell in which a panel temperature adjustment heater is provided on at least one entire surface of the substrate,
A method for manufacturing a liquid crystal display device, which is characterized by injecting liquid crystal.

Another aspect of the present invention (the second aspect) is a space for facing two alignment films and enclosing a liquid crystal between the alignment films of two substrates provided with a liquid crystal driving electrode and an alignment film. And a panel temperature adjusting heater which is integrated so as to form a liquid crystal injection port, and is provided on at least one entire surface of the substrate, the heater including a plurality of heater units divided by a gap extending in a direction perpendicular to the liquid crystal injection direction. When the liquid crystal is injected into the cell for the liquid crystal display element, the heat is sequentially applied to the tip of the liquid crystal from the corresponding heater unit in association with the movement of the tip of the liquid crystal in the void. However, the method of manufacturing a liquid crystal display element is characterized by injecting liquid crystal.

The preferred embodiments of the present invention are as follows. (1) The method for manufacturing a liquid crystal display element, wherein the panel temperature adjusting heater is a transparent electrode such as an ITO (indium tin oxide) film.

(2) The method for manufacturing a liquid crystal display device, wherein the liquid crystal is a ferroelectric liquid crystal.

(3) At the time of injecting liquid crystal, the temperature in the void of the cell for the liquid crystal display device is 60 to 200 ° C., preferably 80.
To 150 ° C., more preferably 80 to 120 ° C., and the method for producing a liquid crystal display device according to the first aspect of the invention.

(4) At the time of injecting the liquid crystal, the temperature in the vicinity of the tip of the liquid crystal in the void of the cell for the liquid crystal display device is set to 60 to 200.
℃, preferably 80 ~ 150 ℃, more preferably 80 ~
The method for producing a liquid crystal display device according to the second aspect of the present invention, wherein the temperature of the portion where the liquid crystal is injected is maintained at the temperature of 120 ° C.

The liquid crystal generally has a shorter response time (a faster response speed) as the temperature rises, and a longer response time (a slower response speed) as the temperature lowers. If the response speed becomes slow, it is not possible to display with sufficient gradation. Therefore, in order to maintain the temperature of the liquid crystal display element at a temperature at which liquid crystal can be displayed, a panel temperature adjustment heater is attached to the liquid crystal display element. The present invention uses this panel temperature control heater for injecting liquid crystal.

The present invention will be described in detail with reference to the accompanying drawings.

First, the method for manufacturing the liquid crystal display element of the first invention will be described in detail. FIG. 1 is an enlarged schematic cross-sectional view of a part of an example of a cell for liquid crystal display element (cell for color liquid crystal display element) used in the first invention. In FIG. 1, a cell 10 for a color liquid crystal display device.
Is a black mask 12, a color filter 13, an overcoat layer 14, a transparent electrode 15 (for example, an ITO electrode), an insulating layer 1 on a transparent substrate 11 (for example, a glass substrate).
6 and the alignment film 17 are provided in this order, while the transparent substrate 1
8, a transparent electrode 19, an insulating layer 20, and an alignment film 21 are provided in this order, and a panel temperature adjusting heater 22 is provided on the surface of the transparent substrate 18 opposite to the surface on which the transparent electrode 19 is provided.
(For example, an ITO film) is provided, and a gap 23 for enclosing a liquid crystal is formed between the alignment film 17 and the alignment film 21.

The transparent electrode 15 and the transparent electrode 19, which are liquid crystal driving electrodes, are both strip-shaped, intersect each other, and intersect each other when seen from the plane side of the color liquid crystal display element cell 10, thereby forming a large number of pixels. Is forming.

FIG. 2 is an enlarged schematic cross-sectional view of a part of an embodiment of a liquid crystal display element cell (monochrome liquid crystal display element cell) used in the first invention. In FIG. 2, a monochrome liquid crystal display element cell 30 includes a transparent substrate 31 (for example, a glass substrate) and a transparent electrode 32.
(For example, an ITO electrode), the insulating layer 33 and the alignment film 34 are provided in this order, while the transparent electrode 36, the insulating layer 37 and the alignment film 38 are provided in this order on the transparent substrate 35,
A panel temperature adjusting heater 39 (for example, an ITO film) is provided on the surface of the transparent substrate 35 opposite to the surface on which the transparent electrode 36 is provided.
Is provided, and a space 40 for enclosing the liquid crystal is formed between the alignment film 34 and the alignment film 38.

Both the transparent electrode 32 and the transparent electrode 36, which are liquid crystal driving electrodes, are strip-shaped and intersect with each other when viewed from the plane side of the monochrome liquid crystal display element cell 30 to form a large number of pixels.

As is clear from the comparison between FIG. 1 and FIG.
The cell 30 for monochrome liquid crystal display device is a black mask 1
2, the same as the color liquid crystal display element cell 10 except that the color filter 13 and the overcoat layer 14 are not provided. Therefore, hereinafter, the cell 1 for the color liquid crystal display device
0, and a description of the monochrome liquid crystal display element cell 30 will be omitted.

FIG. 3 is a schematic plan view of the color liquid crystal display cell 10 shown in FIG. 1 as viewed from the side where the panel temperature adjusting heater 22 is provided. In FIG. 3, a terminal member 24 and a terminal member 25 are joined to both ends of the heater 22 for panel temperature adjustment provided on the transparent substrate 18, respectively.
The terminal members 24 and 25 are connected to an AC power supply 27 via a variable resistor 26.

As described above, the panel temperature adjusting heater 22 and the accessory parts for applying a controlled current thereto (for adjusting the temperature of the liquid crystal display element for stable display when the liquid crystal display element is used). The terminal members 24 and 25, the variable resistor 26, etc.) and the temperature detector (not shown) are also provided in the conventional liquid crystal display element, and need to be changed particularly in order to carry out the first invention. It can be used without. For example, the terminal members 24 and 25 are made of a conductor, and a voltage can be uniformly applied to the panel temperature adjustment heater 22 formed of, for example, ITO. A transformer may be used instead of the variable resistor 26 to change the voltage applied to the panel temperature adjustment heater 22.
A DC power supply may be used instead of the AC power supply 27.

When injecting liquid crystal into the color liquid crystal display element cell 10 according to the first aspect of the present invention, the variable resistor 26 is adjusted to control the current applied to the panel temperature adjustment heater 22 to obtain the color liquid crystal display element. The temperature of the cell 10 is adjusted to a desired temperature, and liquid crystal is injected through the liquid crystal injection port 28. At this time, the higher the temperature of the color liquid crystal display element cell 10, the lower the viscosity of the liquid crystal and the shorter the liquid crystal injection time. However, if the temperature is too high, the composition of the liquid crystal may change. The temperature of the cell 10 for a color liquid crystal display element at the time of injection depends on the properties of the liquid crystal used, but is generally 60 to 200 ° C., particularly 80 to 150 ° C., and particularly preferably 80 to 120 ° C. ..

The color liquid crystal display element cell 10 used in the first invention is not different from the conventionally used color liquid crystal display element cell and is used in the conventional color liquid crystal display element cell. Substrate, electrode, alignment film, other components such as liquid crystal, other structure of cell for color liquid crystal display device, manufacturing method thereof, driving method of cell for color liquid crystal display device and the like can be used. For example, at least one of the two substrates of the color liquid crystal display element cell of the first invention is a transparent substrate provided with a transparent strip electrode, and other than the configuration of the color liquid crystal display element cell illustrated above. Alternatively, a smooth film or the like may be provided. Also,
The heater 22 for panel temperature control is the transparent electrode 1 of the transparent substrate 11.
5 may be provided on the surface opposite to the surface provided,
It may be provided on both the transparent substrate 11 and the transparent substrate 18, or may be provided on the surface of at least one of the transparent substrate 11 and the transparent substrate 18 on the side of the void 23.

Next, the method of manufacturing the liquid crystal display device of the second invention will be described in detail. The liquid crystal display element cell used in the second invention has the same configuration as the liquid crystal display element cell used in the first invention except that the shape of the panel temperature control heater is different. That is, the sectional shape of the liquid crystal display element cell used in the second invention is the sectional shape of the color liquid crystal display element cell 10 shown in FIG. 1 or the monochrome liquid crystal display element cell 30 shown in FIG. Since the shape is the same, the sectional shape of the cell for a liquid crystal display element used in the second invention is based on FIGS. 1 and 2. Also,
The cell for a monochrome liquid crystal display device used in the second invention is the same as the cell for a color liquid crystal display device except that a black mask, a color filter and an overcoat layer are not provided. Also, a cell for a color liquid crystal display element will be described, and a description for a cell for a monochrome liquid crystal display element will be omitted.

FIG. 4 is a schematic plan view seen from the panel temperature adjusting heater 52 side provided on the outer surface of one transparent substrate 51 of the color liquid crystal display element cell 50 used in the second invention. .. In FIG. 4, the panel temperature control heater 52
Is a plurality of heater units 52a, 52b, divided by a gap extending in a direction perpendicular to the liquid crystal injection direction indicated by the arrow.
..52h

Each heater unit 52a, 52b, ...
The terminal members 53a and 53 are provided on both end sides of 52h, respectively.
53h and terminal members 54a, 54b ,.
54h is joined, and each terminal member is connected to an AC power supply or a DC power supply (neither is shown) via a variable resistor or a transformer.

The number of heater units of one color liquid crystal display element cell 50, that is, the number of divided panel temperature adjusting heaters 52, is not particularly limited, and varies depending on the size of the cell, the characteristics of the liquid crystal used, and the like. Generally, it is preferable that the number is 20 to 200. Also, the size of each heater unit does not have to be the same, and can be changed appropriately. Furthermore,
Since the panel temperature adjustment heater 52 needs to uniformly heat the liquid crystal display element when driving the liquid crystal display element,
It is desirable to minimize the gap between the heater units.

In injecting the liquid crystal into the color liquid crystal display element cell 50 according to the second aspect of the invention, when the liquid crystal enters the gap of the color liquid crystal display element cell 50 through the liquid crystal injection port 55, the tip of the liquid crystal moves. The temperature of the heater unit of the portion corresponding to the front end of the liquid crystal is sequentially increased to a higher temperature in association with the above, so that heat is sequentially applied to the front end of the liquid crystal from the heater unit of the corresponding portion. That is, before the liquid crystal is brought into contact with the liquid crystal inlet 55, the heater unit 52
A is energized to raise the heater unit 52a to a predetermined temperature, and liquid crystal injection is started. When the liquid crystal enters the void of the cell and the tip of the liquid crystal approaches the heater unit 52b, the heater unit 52b is also energized and the heater unit 52b is energized.
b is raised to a predetermined temperature. At this time, the temperature of the heater unit 52a in the portion filled with the liquid crystal is maintained at the predetermined temperature. Further, when the liquid crystal enters the void of the cell and the tip of the liquid crystal approaches the heater unit 52c, the heater unit 52c is also energized and the heater unit 52c is then energized.
elevate c to a predetermined temperature. In this way, the temperature is raised to the heater unit 52h, and the heater unit 52a
The entire temperature of up to 52h is set to a predetermined temperature, and finally the liquid crystal is filled in the voids of the color liquid crystal display element cell 50.

The predetermined temperature of the heater unit to be raised depends on the properties of the liquid crystal used, as in the first invention, but is generally 60 to 200 ° C., and particularly 80 to 200 ° C.
It is preferably 150 ° C., more preferably 80 to 120 ° C.

As a means for sequentially increasing the heating temperature of the heater unit of the portion corresponding to the front end of the liquid crystal in conjunction with the movement of the front end of the liquid crystal, the heater unit is manually operated while watching the front end of the liquid crystal. It is possible to employ a method of energizing by the method, a method of automatically energizing the heater unit sequentially by interlocking the detecting means at the tip of the liquid crystal and the energizing switch for each heater unit.

The color liquid crystal display element cell 50 used in the second invention is different from the conventionally used color liquid crystal display element cell except that the panel temperature control heater is divided. There is no substrate, electrodes, alignment film, used in conventional color liquid crystal display cell.
Liquid crystals and other components, other structures of cells for color liquid crystal display elements, manufacturing methods thereof, driving methods of cells for color liquid crystal display elements, and the like can be used. For example,
At least one of the two substrates of the color liquid crystal display element cell of the second invention is a transparent substrate provided with a transparent strip electrode, and has a smooth surface in addition to the configuration of the color liquid crystal display element cell illustrated above. A film or the like may be provided. The panel temperature adjusting heater 52 may be provided on the surface of the transparent substrate opposite to the surface on which the transparent electrode is provided, or may be provided on both of the two transparent substrates, and at least the transparent substrate. It may be provided on one of the surfaces on the gap side.

[0033]

EXAMPLES Next, the present invention will be described in more detail by way of examples.

Example 1 Glass substrate (190 × 250)
(mm square), a black matrix is formed on one surface by a sputtering method, and a segment electrode (ITO transparent electrode) is patterned thereon by a photolithography method with a width of 300 μm, and a polyimide resin LQ-1800 is formed thereon.
(Manufactured by Hitachi Chemical Co., Ltd.) was applied by a spin coater, dried, and then rubbed to form an alignment film, thereby forming a substrate (A).

Another glass substrate (200 × 240 m)
A panel temperature control heater consisting of an ITO film with a surface resistivity of 25 Ω / □ is formed on one side of the (m square), and a common electrode (ITO transparent electrode) is patterned on the opposite side surface by photolithography to a width of 300 μm. Then, an alignment film was formed thereon in the same manner as the substrate (A) to prepare a substrate (B).

A peripheral sealant having a width of 2 is formed around the other substrate.
The liquid crystal injection port was formed by cutting out a part of the peripheral seal.

The alignment films face each other on the two substrates thus formed, the transparent electrodes provided on the respective substrates are orthogonal to each other, and a gap having a thickness of 1.8 μm is formed between the alignment films. Then, the cells were heated and pressure-bonded to prepare a cell.

This cell was placed in a decompression container at 0.1 Tor.
After reducing the pressure to r, the heater for panel temperature control of this cell
An AC voltage of 40 V and 1.33 A was applied to raise the temperature in the void to 85 ° C. Then, the liquid crystal in the liquid crystal injection port (Dainippon Ink Co., Ltd.: DOF0004, phase transition ^{_{temperatures: I SO -69.5 ℃ -N * -64}} ℃ -S A -51.5
_C- SC ^* -7.5 C-C) was contacted, the vacuum was gradually released, and the liquid crystal was injected by the vacuum capillary method. The injection of the liquid crystal into the void was completed in 200 minutes, and a liquid crystal display element having no bubbles remaining in the liquid crystal was obtained.

[Example 2] The cell used in Example 1 except that the temperature inside the gap was raised to 100 ° C by applying an alternating voltage of 45 V and 1.5 A to the heater for panel temperature control of the cell. The liquid crystal was injected in the same manner as in Example 1, using the liquid crystal and the liquid crystal. The injection of the liquid crystal into the void was completed in 180 minutes, and a liquid crystal display element having no bubbles remaining in the liquid crystal was obtained.

[Comparative Example 1] The cell and liquid crystal used in Example 1 were used, except that the cell temperature was adjusted to 85 ° C. by heating with an infrared lamp without applying an AC voltage to the cell panel temperature control heater. Then, liquid crystal was injected in the same manner as in Example 1. It took 230 minutes to inject the liquid crystal into the void, and air bubbles remained in the liquid crystal of the obtained liquid crystal display element, and uneven alignment occurred.

[Embodiment 3] Glass substrate (190 × 250)
(mm square), a black matrix is formed on one surface by a sputtering method, and a segment electrode (ITO transparent electrode) is patterned thereon by a photolithography method with a width of 300 μm, and a polyimide resin LQ-1800 is formed thereon.
(Manufactured by Hitachi Chemical Co., Ltd.) was applied by a spin coater, dried, and then rubbed to form an alignment film, thereby forming a substrate (A).

Another glass substrate (200 × 240 m)
As shown in FIG. 4, an ITO film having a surface resistivity of 25 Ω / □ is formed in a stripe pattern with a width of 1 mm and an interval of 0.5 mm on one side of (m square), and a panel temperature including a large number of heater units is formed. A tuning heater is formed, a common electrode (ITO transparent electrode) is patterned on the surface on the opposite side by photolithography to have a width of 300 μm, and an alignment film is formed thereon in the same manner as the substrate (A). (B) was prepared.

A peripheral sealant having a width of 2 is formed around the other substrate.
The liquid crystal injection port was formed by cutting out a part of the peripheral seal.

Alignment films face each other on the two substrates thus formed, transparent electrodes provided on the respective substrates are orthogonal to each other, and a gap having a thickness of 1.8 μm is formed between the alignment films. Then, the cells were heated and pressure-bonded to prepare a cell.

This cell was placed in a vacuum vessel at 0.1 Torr.
After reducing the pressure to r, an AC voltage of 42V, 0.084A was applied to a heater unit (10 heater units with a length of 15 mm in the injection direction) of the liquid crystal injection port of the heater for panel temperature control of this cell, Adjust the temperature in the air gap at the liquid crystal inlet to 85
The temperature was raised to ℃. Next, a liquid crystal (manufactured by Dainippon Ink and Chemicals, Inc .: DOF0004) was brought into contact with the liquid crystal injection port, and the liquid crystal was injected by a vacuum capillary method. The liquid crystal was injected by interlocking with the movement of the liquid crystal injection tip and by moving the heating in heater units by 15 mm in the injection direction for 10 minutes. Injection of the liquid crystal into the void was completed in 250 minutes, and a liquid crystal display element having no bubbles remaining in the liquid crystal was obtained.

[0046]

According to the method of manufacturing a liquid crystal display element of the present invention, a liquid crystal display element cell which has been conventionally used can be used to easily and quickly produce a liquid crystal without the need for any other special device. A remarkable effect that a liquid crystal display device that can be injected into a cell and bubbles are not substantially left in the liquid crystal can be manufactured can be achieved. Therefore, the method for producing a liquid crystal display device of the present invention is particularly effective for producing a liquid crystal display device using a ferroelectric liquid crystal having a large viscosity.

Further, in the method for manufacturing a liquid crystal display element of the second invention, the liquid crystal injection element is substantially straight when the liquid crystal is injected, and it is easier to obtain a liquid crystal display element in which bubbles are not substantially left in the liquid crystal. It is possible to obtain a remarkable effect that the manufacturing can be reliably performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing an enlarged part of an embodiment (cell for color liquid crystal display element) of a cell for liquid crystal display element used in the first invention.

FIG. 2 is a cross-sectional view schematically showing an enlarged part of one embodiment (cell for monochrome liquid crystal display element) of the cell for liquid crystal display element used in the first invention.

3 is a schematic plan view of the color liquid crystal display element cell 10 shown in FIG. 1 as viewed from the side where a panel temperature adjustment heater 22 is provided.

FIG. 4 is a schematic plan view seen from the panel temperature adjusting heater side provided on the outer surface of one transparent substrate of the cell for color liquid crystal display element used in the second invention.

[Explanation of symbols]

 10 Cell for Color Liquid Crystal Display Element 11 Transparent Substrate 12 Black Mask 13 Color Filter 14 Overcoat Layer 15 Transparent Substrate 16 Insulating Layer 17 Alignment Film 18 Transparent Substrate 19 Transparent Electrode 20 Insulating Layer 21 Alignment Film 22 Panel Temperature Control Heater 23 Gap 24 Terminal Member 25 Terminal member 26 Variable resistor 27 AC power supply 28 Liquid crystal inlet 30 Monochrome liquid crystal display cell 31 Transparent substrate 32 Transparent electrode 33 Insulating layer 34 Alignment film 35 Transparent substrate 36 Transparent electrode 37 Insulating layer 38 Alignment film 39 For panel temperature control Heater 40 Air gap 50 Color liquid crystal display element cell 51 Transparent substrate 52 Panel temperature control heater 52a to 52h Heater unit 53a to 53h Terminal member 54a to 54h Terminal member 55 Liquid crystal inlet

Claims (2)

[Claims] 1. A liquid crystal driving electrode and an alignment film are provided on two substrates so that the alignment films face each other and a space for enclosing a liquid crystal and a liquid crystal injection port are formed between the alignment films. And liquid crystal is injected into the cell for liquid crystal display element, which is provided with a panel temperature adjustment heater on at least one entire surface of the substrate, while heating the liquid crystal display element cell by applying current to the panel temperature adjustment heater. A method for manufacturing a liquid crystal display element, comprising: 2. A liquid crystal driving electrode and an alignment film are provided on two substrates so that the alignment films face each other and a space for enclosing a liquid crystal and a liquid crystal injection port are formed between the alignment films. In a cell for a liquid crystal display element, a panel temperature adjusting heater comprising a plurality of heater units divided into gaps extending in a direction perpendicular to the liquid crystal injection direction is provided on at least one entire surface of the substrate. When injecting the liquid crystal, it is possible to inject the liquid crystal while sequentially applying heat to the tip of the liquid crystal from the corresponding heater unit in association with the movement of the tip of the liquid crystal in the void. A method for manufacturing a characteristic liquid crystal display device.