JP2001330819A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unify the thickness of a liquid crystal layer over the entire display region. SOLUTION: A liquid crystal display device is characterized in the following. Two kinds of members formed by successively laminating electrodes and alignment layers on mother glasses are stuck to each other using a sealing part at a peripheral part of a display region and a dummy member at a non-display region and then the both mother glasses are cut at the non-display region to form the liquid crystal display device formed by sticking a signal electrode member formed by successively laminating plural signal electrodes and alignment layers on the glass substrate to a scanning electrode member formed by successively laminating plural scanning electrodes and alignment layers on the glass substrate via a liquid crystal layer enclosed by the sealing part and the thickness in the thickness direction of the liquid crystal layer is unified over the entire sealing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device such as a memory-type bistable liquid crystal display device using chiral nematic liquid crystal, in which the thickness of a liquid crystal layer is small and uniformity in a plane is required.

[0002]

2. Description of the Related Art In recent years, there is a need in the market for a liquid crystal display device in which the thickness of a liquid crystal layer is small and uniformity in a plane is required. As such a liquid crystal display device, for example, a technique of a memory-type bistable liquid crystal display device using a chiral nematic liquid crystal has been proposed (Japanese Patent Laid-Open No. Hei 7-248485).
Reference).

[0003] This memory-type bistable liquid crystal display device has:
A signal waveform having a delay time introduced between the reset pulse and the selection pulse is provided, thereby shortening the delay time.

[0004] That is, it is said that the transition to the metastable state (0 ° or 360 °) after the Freedericks transition involves a backflow phenomenon. In order to make the most of this phenomenon, a reset pulse and a reset pulse are required. An interval is provided between the selected pulse and the selected pulse. This makes it easier to shift to a metastable state. As a result, the write time per line (selection time) of matrix driving is reduced, and a flicker-less high duty cycle is achieved. It is intended to realize a simple matrix drive.

[0005]

In such a memory-type bistable liquid crystal display device, as the thickness of the liquid crystal layer becomes smaller,
Since the selection time can be shortened, it is necessary to considerably reduce the thickness of the liquid crystal layer and to make the thickness of the liquid crystal layer uniform over the liquid crystal display area.

However, when the signal electrode member and the scanning electrode member are bonded to each other, distortion occurs in the substrate even though spherical spacers having the same diameter are arranged on the entire surface of the substrate in both the display region and the non-display region. In this case, the seal portion is hardened without being uniformly crushed, whereby the layer thickness tends to be large near the seal portion in the display area. As a result, the liquid crystal layer has a desired thickness in the display area. It was difficult to set the thickness uniformly.

This problem will be described with reference to the liquid crystal display devices P and P ′ shown in FIGS. Although both the signal electrode member and the scanning electrode member are cut from the mother glass, a case where six liquid crystal display devices P and P 'are obtained from the mother glass will be described.

FIG. 4 is a plan view of the liquid crystal display device P before division, and FIG. 5 is a schematic sectional view taken along the line bb 'of FIG. FIG. 6 is also a schematic cross-sectional view of the liquid crystal display device P ′ taken along the line bb ′ shown in FIG.

According to the liquid crystal display device P, the transparent substrate 1
A signal electrode 2 and an alignment film 3 are sequentially formed on the substrate, thereby forming a signal electrode member 4. Further, a colored layer 6 for a color filter and a light shielding layer 7 are formed on the transparent substrate 5,
An overcoat layer 8, a scanning electrode 9, and an alignment film 10 are sequentially laminated on these, thereby forming a scanning electrode member 11. Then, the signal electrode member 4 and the scanning electrode member 11 are bonded via the liquid crystal layer 12 by the seal portion 13 and the dummy seal portion 14. Reference numeral 15 denotes a spacer, and reference numeral 16 denotes a display area.

However, before the mother glass is cut as described above, when the signal electrode member 4 and the scanning electrode member 11 are bonded to each other, the substrate is distorted by crushing the seal portion 13, thereby causing distortion. , Display area 1
In the vicinity of the seal portion 13 of No. 6, the layer thickness was large.

For example, as a sealing material, Mitsui Chemicals, Inc.
Using "STRIKE BOND XN-21-S" manufactured by KK
Pressing and heating at 0 kg / cm ² and 150 ° C. caused distortion, and such distortion remained even after the pressing and heating were released.

In the above configuration, the spacer 15 is used. However, a similar problem occurs even when the columnar spacer 17 is formed as in the liquid crystal display device P 'shown in FIG. In the figure, the same parts as those in FIG. 4 are denoted by the same reference numerals.

In order to solve such a problem, there has been proposed a technique in which a groove having a depth of about 1.5 μm is formed by etching using a hydrogen fluoride or the like in a portion of the transparent substrate where the sealing portion contacts (see, for example, Japanese Patent Application Laid-Open Publication No. HEI 9-157556). See Heihei 8-21395).

However, there is a problem that forming such a groove increases the production cost, and it is difficult to form the groove with high accuracy, so that the entire groove cannot be formed to a uniform depth.

Accordingly, an object of the present invention is to provide a liquid crystal display device having a small liquid crystal layer thickness, in which the layer thickness is made uniform over the entire display area and the production cost is reduced.

Another object of the present invention is to provide a memory-type bistable liquid crystal display device in which the thickness of a liquid crystal layer is made uniform and flickerless high-duty simple matrix driving is realized.

Another object of the present invention is to provide a high-quality liquid crystal display device having a uniform cell gap and no color unevenness.

[0018]

According to the liquid crystal display device of the present invention, two kinds of members formed by sequentially laminating an electrode and an alignment layer on a mother glass are further provided by a seal portion on the outer peripheral portion of the display region. In a non-display area, a signal electrode member in which a large number of signal electrodes and an alignment film are sequentially laminated on a glass substrate by bonding together with a dummy member, and then cutting both mother glasses in the non-display area, A scan electrode member formed by sequentially laminating a large number of scan electrodes and an alignment film on a glass substrate is bonded via a liquid crystal layer surrounded by a seal portion, and a liquid crystal layer thickness is applied to the entire seal portion. It is characterized by uniform thickness in the direction.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a method for manufacturing a liquid crystal display device according to the present invention will be described. In this example, a color liquid crystal display device is used as an example.

The one member manufactured through the following steps (a) to (c) and the other member formed by sequentially laminating an electrode and an alignment layer on a mother glass are sealed at the outer peripheral portion of the display area. Then, in the non-display area, the two pieces of mother glass are cut in the non-display area using a dummy member. (A) A colored layer is formed in each display area on the mother glass, and a dummy layer is formed in a non-display area between the display areas. (B) An electrode is formed on the colored layer in each display area. (C) forming an alignment film on the electrode;

Next, a method for manufacturing the liquid crystal display devices A and B according to the present invention will be described in detail with reference to FIGS. 1 to 3 and FIGS.

Both the signal electrode member as the other member and the scanning electrode member as the one member are made of mother glass.
A case where the liquid crystal display devices A and B are manufactured will be exemplified.

FIG. 1 is a plan view of the substrate before division, and FIGS. 2 and 3 are schematic cross-sectional views taken along the line aa 'shown in FIG. 7 to 9 are process diagrams. The same parts as those of the liquid crystal display device shown in FIGS. 4 and 5 are denoted by the same reference numerals. Manufacturing Method of Liquid Crystal Display A The manufacturing method of the liquid crystal display A of the present invention will be described with reference to FIGS. Regarding the signal electrode member 4, a film made of ITO or the like is formed on a transparent substrate 1 which is a mother glass (for example, 300 × 360 mm) by a sputtering method or vapor deposition, and then a large number of signals arranged on one side by photolithography. The electrode 2 is formed. Then, a resin made of a polyimide resin is coated and formed on the signal electrode 2 and then rubbed in one direction, thereby forming the alignment film 3.

Then, a seal portion 13 is formed along the outer periphery of each of the six display regions 16 provided as described above. Simultaneously with the formation of the seal portion 13, a dummy seal portion 14a as the dummy member is also formed in a non-display region between the display regions 16. The dummy seal portion 14a may be provided with the same material as the seal portion 13. For example, there is a thermosetting resin such as an epoxy resin or an acrylic resin, or an ultraviolet curable resin.

The other scanning electrode member 11 is manufactured by a process including the following steps (a) and (b). (A) Process A transparent substrate 5 which is a mother glass (for example, 300 × 360 mm) is prepared. Then, a metal film of chromium, aluminum, silver, or the like is formed on the transparent substrate 5, and thereafter, a light shielding film 7 having a predetermined pattern is formed by photolithography.
(Layer thickness: 1000 to 3000 mm). Instead of such a metal film light shielding film 7, a light shielding film 7 made of black resin is used.
(Thickness: 1.3 to 1.5 μm).

Then, a colored layer 6 for a color filter (having a thickness of 1....) Is formed in a region of the transparent substrate 5 where the light shielding film 7 is not formed.
3 to 1.5 μm). The coloring layer 6 is formed by a pigment dispersion method, that is, a method in which a photosensitive resist prepared in advance with a pigment (red, green, and blue) is applied on a substrate, and is formed by photolithography.

Further, a dummy layer 18 is formed on the non-display area. For example, a resist composed of an acrylic photosensitive polymer, a polyimide photosensitive polymer, or the like is applied, exposed using a photomask, and developed, so that the light-shielding film 7 or the colored layer 6 has a thickness substantially equal to that of the non-display area. The dummy layer 18 is formed so as to be as follows.

Next, the light shielding film 7, the coloring layer 6, and the dummy layer 18
An overcoat layer 8 made of an acrylic resin is applied by a spinner method and formed on the substrate. (B) Step In this step, a film made of ITO or the like is formed by sputtering or vapor deposition, and then a number of scanning electrodes 9 arranged on one side are formed by photolithography. It is preferable to form a layer made of SiO ₂ or SiN between the overcoat layer 8 and a film made of ITO or the like in order to improve adhesion. (C) Step Then, a resin made of a polyimide resin is coated on the scan electrode 9 by coating, and then rubbed in one direction, thereby forming an alignment film 10. Although the scanning electrodes 9 are formed simultaneously in the non-display area,
It is electrically insulated from the inner electrodes. Thereafter, a large number of spherical spacers 15 made of resin are sprayed.

After the above steps (a) to (c),
The signal electrode member 4 and the scanning electrode member 11 have a layer thickness of 1.5 μm.
Liquid crystal layer 12 (a liquid crystal composition exhibiting a nematic phase at room temperature "ZLI-1557 manufactured by E. Merck") and an optically active additive "S-811 manufactured by E. Merck" were added to make the helical pitch P 2.7 μm. (Adjusted), and are bonded together by the seal portion 13 and the dummy seal portion 14a.

Next, such a bonded mother glass substrate is pressure-bonded, divided at a non-display area, and a liquid crystal material is injected into each liquid crystal display device A through a part of the opening of the seal portion 13. Later, the inlet is sealed. The dividing portion is provided between the seal portion 13 and the dummy seal portion 14a.

According to the liquid crystal display device A obtained by the above-described method, the dummy layer 18 is formed in the non-display area so as to have substantially the same thickness as the light-shielding film 7 or the colored layer 6, so that the signal electrode member 4 When the sealing portion 13 and the dummy sealing portion 14a are crushed and hardened evenly when the scanning electrode member 11 and the scanning electrode member 11 are bonded to each other,
3, the thickness of the liquid crystal layer in the thickness direction is made uniform, so that no distortion occurs in the substrate.

Further, according to the liquid crystal display device A having the above configuration, a polarizing plate is further provided outside each of the signal electrode member 4 and the scanning electrode member 11, and the liquid crystal is composed of a chiral nematic liquid crystal. The layer 12 has a twisted structure in an initial state, and has two metastable states different from the initial state due to a voltage difference applied after applying a voltage causing a Freedericks transition to the initial state. Bistable type.

For example, the twist angle φ ₀ in the initial state
When the twisted state of φ ₀ + π (= 360 °) with respect to (= 180 °) is set to be a dark state and the positional relationship (crossed Nicols) of the two polarizing plates is set, the bright state has a twist angle φ ₀ −π.
(= 0 °).

Next, the liquid crystal display device A using the bistable type is switched between 0 ° and 360 ° across an unstable state (unstable region) as shown in FIG.

When such switching is performed, the selection voltage after applying a voltage that causes the Freedericksz transition in the initial state is set to 360 ° when the selection voltage is lower than V1, 0 ° when the selection voltage is increased to V2, and Vl to V
If it is between 2, an unstable state in which 0 ° and 360 ° are mixed occurs.

For example, by making both polarizing plates cross Nicol,
Φ ₀ + for the initial twist angle φ ₀ (180 °)
The twisted state of π (360 °) is a dark state, φ ₀ −π (0
If the state of (°) is a bright state, the unstable state is a mixture of two states (bright state and black state), indicating a state between white and black. Further, the switching using the two metastable states as described above is similarly performed by using the relationship where the selection voltages are set to V3 and V4 as shown in FIG.

Further, matrix driving of the liquid crystal display device A will be described with reference to FIG. Assuming that the scanning potential is VS and the signal potential is Vd, a selection pulse value (selection voltage) V1 (= ± | VS + Vd |) for expressing the 0 ° state, and 36
Selection pulse value (selection voltage) for developing 0 ° state
For V2 (= ± | VS−Vd |), V2−V1 = 2
Vd. When the condition of 2Vd> △ 1 and △ 2 is satisfied in the values of the widths △ 1 and △ 2 of the unstable region, 3
A 60 ° / 0 ° state is developed and matrix driving can be performed. Manufacturing method of liquid crystal display device B In the liquid crystal display device A, the signal electrode member 4 and the scanning electrode member 11 are bonded via a number of spacers 15, but a columnar spacer is provided instead. The dummy seal portion 14a on the non-display area is the dummy member. The same parts as those of the liquid crystal display device A are denoted by the same reference numerals.

FIG. 3 is a cross-sectional view of the liquid crystal display device B before the mother glass is divided, and FIG. 8 shows a manufacturing process.

The signal electrode member 4 has the same manufacturing method as that of the liquid crystal display device A and has a mother glass (for example, 300 ×
A large number of signal electrodes 2 arranged on one side are formed on a transparent substrate 1 (360 mm), and a resin made of polyimide resin is coated on the signal electrodes 2 by coating, and then rubbed in one direction. Thus, an orientation film 3 is formed. Then, the seal portion 13 and the dummy seal portion 14a are simultaneously formed in the six display regions 16.

The other scanning electrode member 11 is manufactured by a process including the following steps (a) and (b). (A) Process A metal film of chromium, aluminum, silver, or the like (thickness of 1000 to 3000 °) or a black resin (thickness of 1.3 to 1.5 μm) is formed on a transparent substrate 5 which is a mother glass (for example, 300 × 360 mm). ) Is provided,
Then, a colored layer 6 (thickness: 1.3 to 1.5 μm) for a color filter is formed in a region where the light shielding film 7 is not formed. Further, a dummy layer 18 is formed on the non-display area.
Next, an overcoat layer 8 made of an acrylic resin is applied on the light-shielding film 7, the colored layer 6, and the dummy layer 18 by a spinner method. (B) Step In this step, a film made of ITO or the like is formed by sputtering or vapor deposition, and then a number of scanning electrodes 9 arranged on one side are formed by photolithography. It is preferable to form a layer made of SiO ₂ or SiN between the overcoat layer 8 and a film made of ITO or the like in order to improve adhesion. (C) Step Then, a resin made of a polyimide resin is coated on the scan electrode 9 by coating, and then rubbed in one direction, thereby forming an alignment film 10. Further, a part of the scanning electrode 9 is also formed in a non-display area.

Thereafter, the columnar spacer 17 is formed in the region between pixels (non-pixel region), and the columnar spacer 19 as the dummy member is formed on the dummy layer 18.

The columnar spacers 17 and 19 are formed by applying a resist made of, for example, an acrylic photosensitive resin or a polyimide photosensitive resin, exposing using a photomask, developing, and uniforming the thickness.

After going through each of the above steps (a) to (c),
The signal electrode member 4 and the scanning electrode member 11 have a layer thickness of 1.5 μm.
Are adhered by the seal part 13 and the dummy seal part 14a and the columnar spacers 17 and 19 via the liquid crystal layer 12 of FIG.

Then, such a bonded mother glass substrate is pressure-bonded, divided at a non-display area, and a liquid crystal material is injected into each liquid crystal display device B through a part of the opening of the seal portion 13. Later, the inlet is sealed.

Thus, according to the liquid crystal display device B obtained by the above-described manufacturing method, the dummy layer 18 and the columnar spacers 17 and 19 are formed in the non-display area so as to have substantially the same thickness as the light shielding film 7 or the colored layer 6. In doing so, when the signal electrode member 4 and the scanning electrode member 11 are bonded to each other, the seal portion 13 and the dummy seal portion 14a are evenly crushed and hardened, and the thickness of the seal portion 13 in the liquid crystal layer thickness direction is made uniform. This eliminates distortion of the substrate.

Further, in the liquid crystal display device B, even when compared with the liquid crystal display device A, the columnar spacers 17 and 19 are formed, so that the columnar spacers 17 and 19 are provided in the liquid crystal layer more uniformly than the spherical spacers 15 arranged by scattering. As a result, the degree of variation in the thickness of the liquid crystal layer is further improved, and the layer thickness becomes uniform.

The liquid crystal display device B having the above configuration also has a configuration in which a polarizing plate is disposed outside each of the signal electrode member 4 and the scanning electrode member 11, and the liquid crystal layer 13 made of chiral nematic liquid crystal. Has a twisted structure in the initial state, and has two metastable states different from the initial state due to the voltage difference applied after applying a voltage that causes the Freedericksz transition in the initial state. Type.

When the light shielding film 7 and the colored layer 6 are formed, the thickness of the dummy layer 18 is adjusted by changing the photomask used therewith so that the dummy layer 18 is formed of the same material as the dummy layer 18. May be. This manufacturing process is shown in FIG.

It should be noted that the present invention is not limited to the above embodiments, and various changes and improvements may be made without departing from the scope of the present invention. For example, the same operation and effect can be obtained in a ferroelectric liquid crystal display device or an antiferroelectric liquid crystal display device using a chiral smectic liquid crystal having a small liquid crystal layer thickness. Furthermore, the liquid crystal layer thickness is 5μ.
The same effect can be obtained even with a normal STN or TN type liquid crystal display device of about m. Moreover, in the embodiment, the structure of the simple matrix drive system has been described as follows, but the same operation and effect can be obtained by other drive systems, for example, the structure of the active matrix drive system.

[0050]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a dummy layer 18 is formed on a non-display area, and a dummy seal portion 14a and a columnar spacer 19 are formed.
Is provided, the height of the light-shielding film 7 or the coloring layer 6 on the display area 16 is made equal.

Therefore, the present inventor has set the height d1 of the display area 16 on the transparent substrate 5 (the thickness of the scanning electrode member 11 in the display area 16) and the height d2 of the non-display area on the liquid crystal display device B. (The thickness of the scanning electrode member 11 in the non-display area) is changed in many ways, and the signal electrode member 4 and the scanning electrode member 11 are each separated via the liquid crystal layer 12 having a layer thickness of 1.5 μm. Dummy seal part 1
4a, the bonded mother glass substrate was bonded by pressure bonding, divided in a non-display area, and a liquid crystal material was injected to obtain a liquid crystal display device B.

For the measurement of the heights d1 and d2, a DEKTAK device for detecting the upper and lower touches of the stylus and measuring the surface shape by bringing the stylus into contact with the object to be measured and moving the object to be measured. Using, measure the thickness of each film,
Then, a method was used in which the calculation was performed in consideration of the substrate structure.

Then, these various liquid crystal display devices were evaluated and classified into “good” and “bad” for 2 minutes. "Good" indicates that flicker-less high-duty simple matrix driving is realized, thereby achieving high quality without color unevenness. This is the case where unevenness occurs. D1-d2 = 2.1 μm ⇒ “bad” d1-d2 = 1.8 μm ⇒ “bad” d1-d2 = 1.6 μm ⇒ “bad” d1-d2 = 1.4 μm ⇒ “bad” d1 −d2 = 1.2 μm ⇒ “good” d1-d2 = 1.1 μm ⇒ “good” d1-d2 = 1.0 μm ⇒ “good” d1-d2 = 0.9 μm ⇒ “good” d1-d2 = −0.9 μm ⇒ “good” d1-d2 = −1.0 μm ⇒ “good” d1-d2 = -1.1 μm ⇒ “good” d1-d2 = -1.2 μm ⇒ “good” d1 −d2 = −1.4 μm ⇒ “bad” Thus | d1-d2 | ≦ 1.2, preferably | d1-
By setting d2│ ≦ 1.0, a flickerless high-duty simple matrix drive was realized, thereby achieving high quality without color unevenness.

When d1−d2 = 1.4 to 2.1 μm, the outer circumference of the display area 16 is used as a starting point, and when the cell gap difference there is set to 0.00, the display area is moved from the starting point to within the display area. When the change of the cell gap difference was followed by moving the measurement position toward, the result as shown in FIG. 12 was obtained.

When the thickness of the entire seal portion 13 in the liquid crystal layer thickness direction (seal height) was measured, as shown in FIG. 15, the seal height increased toward the inside of the liquid crystal cell.

Next, d1−d2 = −1.2 to 1.2 μm
In the case of, by similarly moving the measurement position from the outer periphery of the display area 16 toward the inside of the display area and following the change of the cell gap difference, the result shown in FIG. 13 is obtained. Was done.

FIG. 16 shows the result of measurement of the seal portion.
As shown in the figure, the seal heights are uniform. When the seal height was 0.05 μm or less with respect to the seal width of 600 μm, it was confirmed that the cell gap difference was 0.10 μm or less.

Further, when d1−d2 <−1.4 μm, the change in the cell gap difference was similarly traced starting from the outer periphery of the display area 16, and the result shown in FIG. 14 was obtained. Was done.

When the thickness (seal height) of the entire seal portion in the thickness direction of the liquid crystal layer was measured, as shown in FIG. 17, the seal height became lower toward the inside of the liquid crystal cell.

As is clear from these results, d1-
By reducing d2 to -1.2 to 1.2 μm,
It can be seen that the gap difference in the display area is significantly reduced.

As described above, two types of members formed by sequentially laminating an electrode and an alignment layer on a mother glass are bonded together with a seal portion on the outer peripheral portion of the display region and a dummy member on the non-display region. According to the liquid crystal display devices A and B in which both mother glasses are cut in the non-display area,
The thickness of the liquid crystal layer in the thickness direction can be made uniform with respect to the entire seal portion, thereby preventing the substrate from being distorted.

[0062]

As described above, according to the liquid crystal display device of the present invention, two types of members formed by sequentially laminating an electrode and an alignment layer on a mother glass are provided at the outer peripheral portion of the display region by a sealing portion. Further, in a non-display area, a signal electrode member is formed by laminating a number of signal electrodes and an orientation film on a glass substrate by laminating with a dummy member and then cutting both mother glasses in the non-display area. And a scanning electrode member formed by sequentially laminating a large number of scanning electrodes and an alignment film on a glass substrate via a liquid crystal layer surrounded by a sealing portion, and bonding the liquid crystal to the entire sealing portion. By aligning the thickness in the layer thickness direction, especially in a liquid crystal display device having a small liquid crystal layer thickness, the layer thickness can be remarkably uniformed over the entire display area, and the production cost can be reduced. High reliability liquid crystal display device could be provided.

Further, according to the present invention, it is possible to provide a memory-type bistable liquid crystal display device in which the thickness of the liquid crystal layer is made uniform and flickerless high-duty simple matrix driving is realized.

Further, in the present invention, a high-quality liquid crystal display device having excellent characteristics for color liquid crystal display and having a uniform cell gap and no color unevenness can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display device of the present invention before a mother glass is divided.

FIG. 2 is a schematic cross-sectional view taken along the line aa ′ shown in FIG.

FIG. 3 is a schematic cross-sectional view taken along the line aa ′ of FIG. 1;

FIG. 4 is a plan view of a conventional liquid crystal display device before a mother glass is divided.

FIG. 5 is a schematic sectional view taken along the line bb 'of FIG. 4;

FIG. 6 is a schematic cross-sectional view taken along the line bb ′ of FIG. 4;

FIG. 7 is a process chart relating to a method of manufacturing the liquid crystal display device of the present invention.

FIG. 8 is a process chart relating to a method for manufacturing the liquid crystal display device of the present invention.

FIG. 9 is a process chart relating to a method for manufacturing the liquid crystal display device of the present invention.

FIG. 10 is an explanatory diagram showing a relationship between a selection voltage and an unstable state (unstable region) in a bistable liquid crystal display device.

FIG. 11 is an explanatory diagram showing a switching state in a bistable liquid crystal display device.

FIG. 12 is a diagram showing a relationship between a cell gap measurement position and a gap difference.

FIG. 13 is a diagram showing a relationship between a cell gap measurement position and a gap difference.

FIG. 14 is a diagram showing a relationship between a cell gap measurement position and a gap difference.

FIG. 15 is a diagram showing a relationship between a position of a seal portion and a seal height.

FIG. 16 is a diagram showing a relationship between a position of a seal portion and a seal height.

FIG. 17 is a diagram showing a relationship between a position of a seal portion and a seal height.

DESCRIPTION OF SYMBOLS 1,5 Transparent substrate Signal electrode 3,10 Alignment film 4 Signal electrode member Coloring layer Light shielding layer 11 Forward scanning electrode member 12 Liquid crystal layer 13 Seal part 14,14a Dummy seal part 16 Display area 17,19 Column spacer 18 Dummy layer

Claims (1)

[Claims] 1. Two kinds of members formed by sequentially laminating an electrode and an orientation layer on a mother glass are adhered by a seal portion in an outer peripheral portion of a display region and by a dummy member in a non-display region. By cutting both mother glasses in the non-display area, a signal electrode member formed by sequentially laminating a number of signal electrodes and an alignment film on a glass substrate, and a number of scanning electrodes and an alignment film on the glass substrate A liquid crystal display device characterized in that a scanning electrode member formed by successively laminating a liquid crystal layer and a sealing member are bonded together via a liquid crystal layer surrounded by a sealing portion, and the thickness of the sealing portion in the thickness direction of the liquid crystal layer is made uniform. .