JP2001255517A - Substrate for liquid crystal display device and the liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate for liquid crystal display device, capable of preventing light leakage at black displaying and obtaining a liquid crystal display having uniform black display and high display quality by utilizing glass or the like, where the product of its photoelastic modulus C and a thickness d is limited, and to provide a liquid crystal display device. SOLUTION: CF substrates 11, 21 and 31 for liquid crystal display device each having >=0 and <=2.32 [brewster.mm] product of a thickness dCF and a photoelastic modulus CCF are used. These substrates are made of glass or plastic. The glass has >=0.1 and <=76.9 wt.% PbO component, >=0.1 and <=86.5 wt.% CaO component, >=0.1 and <=51.9 wt.% Na2O component and >=0.1 and <=63.5 wt.% BaO component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate for a liquid crystal display device and a liquid crystal display device, and more particularly to a flat display, particularly a large liquid crystal display having a wide viewing angle.

[0002]

2. Description of the Related Art Generally, liquid crystal displays such as TF
In the T liquid crystal display device, a transparent electrode is formed on a transparent plate glass substrate, and a CF substrate and a TFT substrate are placed so that the transparent electrodes face each other, a liquid crystal is sandwiched between the substrates, and a polarizing plate is provided outside the substrate. Are attached so as to be orthogonal to each other. By adjusting the alignment state of the liquid crystal with an external voltage, the light incident on the liquid crystal display becomes a transmission state or a non-transmission state, and displays a gray scale.

[0003] The screen size of a liquid crystal display is increasing. As a direction for increasing the size of a liquid crystal display, a plasma-addressed liquid crystal (hereinafter, referred to as “PALC”) is known. As shown in FIG. 1, the plasma addressed liquid crystal display device includes a CF substrate 31, a dielectric layer substrate 21, and a plasma substrate 11. The liquid crystal layer 3 is formed by the CF substrate 31 on which the transparent electrode is formed and the dielectric layer substrate 21.
5 and the dielectric layer substrate 21 and the plasma substrate 1
An anode electrode 12 and a cathode electrode 13 are provided in the plasma chamber between the two. Switching is performed according to the plasma state of the rare gas existing in the plasma chamber, and a voltage is applied to the liquid crystal layer 35 between the virtual electrode and the transparent electrode, thereby enabling display. In the plasma-addressed liquid crystal, light leakage occurs during black display, and the light leakage appears as uneven brightness, which may degrade display quality.

[0004]

According to the present invention, light leakage during black display can be prevented by using glass or the like in which the product of the photoelastic constant C and the thickness d of the glass is limited.
It is an object of the present invention to provide a liquid crystal display device substrate and a liquid crystal display device which can provide a liquid crystal display having a uniform black display and a high display quality.

[0005]

According to the present invention, the product of the thickness d _CF and the photoelastic constant C _CF is 0 or more and 2.32 [blews].
ter · mm] or less.

Further, the present invention is a substrate for a liquid crystal display device CF whose material is glass or plastic.

In the present invention, the glass is preferably made of PbO
Is a CF substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 76.9 wt% or less.

Further, the present invention is a CF substrate for a liquid crystal display device, wherein the glass contains CaO in a component ratio of 0.1 wt% or more and 86.5 wt% or less.

In the present invention, the glass is preferably made of Na ₂ O
Is a CF substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 51.9 wt% or less.

In the present invention, the glass is preferably made of BaO
Is a CF substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 63.5 wt% or less.

Further, according to the present invention, the product of the thickness d _PL and the photoelastic constant C _PL is 0 or more and 2.32 [brewster · m].
m] or less.

Further, the present invention is a plasma substrate for a liquid crystal display device, whose material is glass or plastic.

In the present invention, the above-mentioned glass is preferably made of PbO
In a component ratio of 0.1 wt% or more and 76.9 wt% or less.

Further, the present invention is the plasma substrate for a liquid crystal display device, wherein the glass contains CaO in a component ratio of 0.1 wt% or more and 86.5 wt% or less.

In the present invention, the glass is preferably made of Na ₂ O
Is a plasma substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 51.9 wt% or less.

In the present invention, the glass is BaO
Is a plasma substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 63.5 wt% or less.

Further, according to the present invention, the thickness d _μ and the photoelastic constant C
The product of _μ is 0 or more and 2.32 [brewster · mm]
The following is a dielectric layer substrate for a liquid crystal display device.

Further, the present invention is a dielectric layer substrate for a liquid crystal display device, whose material is glass or plastic.

In the present invention, the glass is preferably made of PbO
Is a dielectric layer substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 76.9 wt% or less.

Further, the present invention is a dielectric layer substrate for a liquid crystal display device, wherein said glass contains CaO in a component ratio of 0.1 wt% or more and 86.5 wt% or less.

Further, in the present invention, the glass is preferably made of Na ₂ O
Is a dielectric layer substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 51.9 wt% or less.

In the present invention, the glass is BaO
Is a dielectric layer substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 63.5 wt% or less.

Further, according to the present invention, the product of the thickness d _TFT and the photoelastic constant C _TFT is 0 or more and 2.32 [brewster].
[Mm] or less.

Further, the present invention is a TFT substrate for a liquid crystal display device whose material is glass or plastic.

In the present invention, the glass is preferably made of PbO
Is a TFT substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 76.9 wt% or less.

Further, the present invention is a TFT substrate for a liquid crystal display device, wherein said glass contains CaO at a component ratio of 0.1 wt% or more and 86.5 wt% or less.

In the present invention, the glass is preferably made of Na ₂ O
Is a TFT substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 51.9 wt% or less.

In the present invention, the glass is BaO
Is a TFT substrate for a liquid crystal display device having a component ratio of 0.1 wt% or more and 63.5 wt% or less.

Further, the present invention is a plasma-addressed liquid crystal display device comprising the above-described CF substrate, plasma substrate and dielectric layer substrate as components.

Further, the present invention is a TFT liquid crystal display device comprising the above-described CF substrate and TFT substrate as constituent elements.

The operation of the present invention will be described. When the glass that composes the liquid crystal display is in a state where no thermal stress is applied, it is a transparent light isotropic body, so the two polarizing plates are in a crossed Nicols state, and the glass is sandwiched between them. , Black state, no light leakage, and no brightness unevenness. However, heat is generated from the backlight and the driving circuit that constitute the liquid crystal display, and generates thermal stress on the liquid crystal panel. When stress is applied to the glass, the incident light travels separately in the two principal stress directions and produces a phase difference when exiting the glass. It is known experimentally that the following equation holds for the phase difference at this time (see the Optical Measurement Handbook, published by Asakura Shoten). Δ = 2πC · d · (σx−σy) / λ Equation 1 where Δ: phase difference, C: photoelastic constant, σx, σy: principal stress in the first axis and second axis directions, λ: The wavelength of light, d: thickness of glass.

Using this phase difference Δ, it is known that the light intensity I is derived as follows: I = a ² sin ² (2α) sin ² (Δ / 2) (2) here,
α: The angle between the polarization direction of light and the principal stress.

As the light intensity I increases, light leakage increases and the uniformity of the display decreases. Therefore, if the C · d of the glass is reduced, the phase difference Δ that occurs is reduced according to Equation 1, and the light intensity I is reduced. Therefore, light leakage during black display of the liquid crystal display is reduced, and the luminance distribution is extremely low. Thus, a liquid crystal panel with low display quality can be obtained.

The degree of luminance uniformity will be described.
Ideally, the light intensity for black display is 0, but in reality, even if it is black, the light intensity is not 0 but has a finite value. When the panel displays black, the light intensity has a distribution that varies depending on the location. It can be said that the smaller the variation of the distribution and the lower the absolute value, the higher the uniformity. Empirically, if the value obtained by dividing the luminance (Lmax) at the maximum luminance point in the black display of the liquid crystal panel by the average value (Lave) of the luminance at each point is 1.5 times or less, it is difficult to feel unevenness. I understood.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. As an example, the wide viewing angle technology and PAL
A display combining C will be described.

The structure of PALC will be described. FIG. 1 is a sectional view of a plasma addressed liquid crystal display. PALC is broadly divided into a plasma switch portion and a color filter (hereinafter abbreviated as “CF”) portion. First, an anode electrode 12 is formed on a glass plasma substrate 11 having a thickness of about 2 mm.
And a cathode electrode 13 are provided in a row, and a partition wall 14 is formed to separate a plasma generation region on the anode electrode 12. On top of this, a dielectric layer 21 is formed to separate the plasma region from the liquid crystal portion. A glass thin plate is used for the dielectric layer 21 (hereinafter, this thin glass is referred to as a “microsheet”). Partition wall 14
During the interval, a rare gas is filled after vacuuming for plasma discharge. Orientation films 22 and 32 are applied to the facing surfaces of the dielectric layer 21 and the CF substrate 31, respectively.
Then, a wall 33 is formed, and spacers 34 are dispersed and bonded to maintain a specified cell gap. The gap is filled with the liquid crystal 35. Polarizing plates 41 and 42 are attached to both outer surfaces of the plasma substrate 11 and the CF substrate 31 so that the polarization axes are perpendicular to each other. A backlight (not shown) is provided outside the polarizing plate 41 on the plasma substrate 11 side.

The materials of the CF substrate 31, the plasma substrate 11, and the dielectric layer substrate 21 will be described. The material of each substrate is typically glass, but quartz or plastic can also be used.

The product of the photoelastic constant C of each substrate and the thickness d of the glass will be described. According to equation 2, the light intensity I
Is I∝sin ² (Δ / 2), and since the thermal stress generated by the bias of the heat distribution generated by the backlight and the driving circuit of the liquid crystal panel is small, and Δ≪1, it follows that I∝ (Δ / 2) ² ... Equation 3 can be rewritten as I∝ (C · d) ² . In an actual panel, since light is scattered, the leakage light I is A + B · (C · d) ² . From experiments, it was found that the maximum C · d at which the luminance ratio (maximum / average) was 1.5
Was 2.32.

The dielectric layer (microsheet) glass and its material will be described. Microsheets are usually 50
The photoelastic constant _Cμ may be 46.4 or less because it is very thin, μm. By the way, the microsheet is required to have mechanical strength because it is thin and difficult to handle. JP 4
In the microsheet having the structure disclosed in JP-A-313788, a thicker microsheet can be manufactured. Therefore, the photoelastic constant C _μ at a thickness of 0.7 mm or more is 3.
It is necessary to set it to 3 [brewster] or less. PbO (51), BaO (52), Ca on glass (SiO ₂ )
FIG. 2 shows the change characteristic of the photoelastic constant when the composition is changed by adding O (53), Na ₂ O (54) and B ₂ O ₃ (55).
Shown in (Schwiecker, Title: Kompo
nentabhangigkeit der spaa
ungsoptischen Koeffificent
en von Glas. Glastech. Ber.
30, 84-88 (1957)). The horizontal axis shows the component ratio of each additive, and the balance is SiO2, while the vertical axis shows the photoelastic constant C. PbO, Ba
When O, CaO, and Na ₂ O are added to glass (residual SiO ₂ ), the photoelastic constant C can be reduced to 3.3 or less as shown in FIG. Since the photoelastic constant C must be a positive value, PbO is 0.1 wt% or more and 76.9.
wt% or less, CaO is 0.1 wt% or more and 86.5 wt%
Hereinafter, Na ₂ O must be 0.1 wt% or more and 51.9 wt% or less, and BaO must be 0.1 wt% or more and 63.5 wt% or less. In particular, the photoelastic constant of 2.32 or less is at least 63.5 wt% of PbO and 44.2 wt% of CaO.
% Or _more, Na 2 _O26.9wt% or more, BaO46.2
wt% or more. A non-alkali glass is desirable for the microsheet because it touches the liquid crystal, but an alkali glass can also be used by applying a thin film for preventing elution of alkali such as SiO ₂ .

The glass for a plasma substrate will be described. Since the glass of the plasma switch part is responsible for the structural strength of the PALC, a thick glass is required. Moreover, the glass is sandwiched between two polarizing plates, so that the optical characteristics are important. It is the thickest of the glasses that make up PALC, and according to Equation 1, the effect of photoelasticity is greatest. Therefore, among other constituent glasses, a glass having a small photoelastic constant C is required. Alkali glass can be used for the plasma substrate glass because it does not touch the liquid crystal. From the viewpoint of strength, the thickness needs to be 0.7 mm or more. By adding PbO, BaO, CaO, and Na ₂ O to the glass, the photoelastic constant C can be reduced as shown in FIG. Since the photoelastic constant must be a positive value, PbO is 0.1 wt% or more and 76.9 wt%.
Hereinafter, CaO is 0.1 wt% or more and 86.5 wt% or less,
Na ₂ O is 0.1 wt% or more and 51.9 wt% or less, Ba
O must be not less than 0.1 wt% and not more than 63.5 wt%.

The CF substrate will be described. In the CF substrate, RGB colors are formed in stripes on glass having a thickness of about 1 mm, and a gap between the colors is filled with black resin to form a light shielding portion.

The glass substrate for CF and its material will be discussed.
I will tell. Structural strength obtained with glass for plasma substrates
Therefore, the CF glass can be made thinner,
Therefore, 0.7 mm is necessary from the viewpoint of strength. On glass
PbO, BaO, CaO, Na ₂By adding O
Therefore, as shown in FIG.
it can. The photoelastic constant C must be a positive value
And PbO is 0.1 wt% or more and 76.9 wt% or less, and C
aO is 0.1 wt% or more and 86.5 wt% or less, Na ₂O
Is 0.1 wt% or more and 51.9 wt% or less, and BaO is 0.1 wt% or less.
It must be 1 wt% or more and 63.5 wt% or less.
The glass for CF substrate does not directly touch the liquid crystal
And alkali glass can be used.

The formation of the wall will be described. Since it is necessary to surround the RGB pixels with a lattice-like wall, a wall having a height of about 3 μm can be formed by forming a negative resist in a lattice-like manner.

The formation of the alignment film will be described. Since the liquid crystal injected into the panel is an n-type liquid crystal, it is necessary to form a vertical alignment film that allows the liquid crystal to stand on both substrates in contact with the liquid crystal. An alignment film is formed on a CF substrate and a microsheet.

The bonding of the CF substrate and the plasma substrate will be described. 6 μm spherical plastic beads (manufactured by Sekisui Chemical) were sprayed on the CF substrate, a sealing material (manufactured by Mitsui Toatsu) was applied to the periphery of the substrate, and the CF substrate and the plasma substrate were bonded and thermally cured. (Hereafter referred to as "cell")

The liquid crystal mixture will be described. The following compound 1 and a polymerization initiator were mixed in the liquid crystal material as a photocurable resin. The polymerization initiator includes Irgacure 651
(Made by Ciba-Geigy). The photocurable resin is necessary to fix the orientation of the liquid crystal molecules.

Embedded image

When S811 (manufactured by Merck) is mixed with the liquid crystal so that the cell thickness is twisted by 40 to 110 °, preferably 90 °, the brightest panel in the bright state of the panel can be obtained.

The injection will be described. The liquid crystal mixture is injected through a hole previously formed in the cell, and
Seal the hole with resin.

The method of controlling the axisymmetric alignment will be described.
A circuit for driving plasma discharge and a circuit for driving liquid crystal were connected to the cell, and a voltage was applied so that the liquid crystal moved slightly while the plasma was discharged. Irradiation of UV light from the plasma substrate side fixes the orientation of the liquid crystal.

The phase difference plate will be described. By providing the retardation plate between the polarizing plates, the viewing angle characteristics in the direction of 45 ° with respect to the polarization axis are improved.

Embodiment 1 will be described. The glass for a plasma substrate has a photoelastic constant of 2.80 and a thickness of 0.8 mm (C × d =
2.24) was obtained by polishing OA-2 (manufactured by NEC Corporation). A hole for evacuation was made in one place of the glass, and an Ni paste was applied and baked on the glass by screen printing to form an anode electrode and a cathode electrode in a row.

A glass paste was screen-printed several times on the anode electrode and fired to form a partition having a height of about 200 μm. Polish the partition walls to make the height uniform, 50 μm
Thick microsheet (photoelastic constant 3.26 [brews]
ter] (C × d = 0.163), a glass frit was linearly applied to the periphery, and bonded on the partition wall. After firing, air was exhausted from the exhaust port at 10 ⁻⁶ Torr (1.33 × 1
0 ^-4 Pa) and exhaust several Torr.
(About 7 × 10 ³ Pa). Glass for CF substrate has a photoelastic constant of 2.80 [brewster],
OA-10 (manufactured by NEC Corporation) having a thickness of 0.7 mm (C × d = 1.96) was used. On the CF substrate, signal electrodes were formed in stripes corresponding to the RGB monochrome pixels using ITO for signal writing.

The formation of the wall will be described. OMR83 (manufactured by Tokyo Ohkasha Co., Ltd.) on the CF substrate, about 3 μm high in a grid
Was made in the BM part.

The formation of the alignment film will be described. JALS
-204: A vertical alignment film (manufactured by Nippon Synthetic Rubber Co., Ltd.) was formed on both the CF substrate and the microsheet.

In order to fill the non-display area of the CF substrate with liquid crystal injection, two holes were drilled in the non-display area. Spacers are sprayed to maintain the cell thickness, and the BM
The portions (black stripes) corresponded to the partition walls of the plasma substrate, and the ITO signal electrodes of CF and the partition walls of the plasma substrate were bonded so as to be orthogonal to each other. 2 opened on CF substrate
Air was evacuated from the holes, a mixture of liquid crystal and a photocurable resin was injected, and the mixture was sealed with a sealing material.

The liquid crystal mixture will be described. 0.3 wt% of the above compound 1 and 0.1 wt% of a polymerization initiator Irgacure 651 were mixed as a photo-curable resin with an n-type liquid crystal material (Δε = −4.0, Δn = 0.08). In the liquid crystal, S811 (manufactured by Merck) was mixed at 6 μm so as to be twisted by 90 °.

The method of controlling the axisymmetric alignment will be described.
A circuit for plasma discharge and a circuit for driving liquid crystal were connected to this cell, and a voltage of about 10 V was applied to the liquid crystal mixture while the plasma was discharged. While maintaining this state, UV light (365 nm, intensity 6 m
(W / cm ² ) for 10 minutes to fix the orientation of the liquid crystal.

A description will be given of the attachment of the polarizing plate. A polarizing plate (EG1425DUHC, manufactured by Nitto Denko) was attached to the front and back of the panel prepared as described above so as to form a cross Nicol.

Embodiment 2 will be described. The glass for a plasma substrate has a photoelastic constant of 1.36 and a thickness of 1.7 mm (C × d =
2.34) SF4 (manufactured by SCHOTT, see FIG. 4). A hole for exhaust was made in one place of the glass, and N
The i-paste was applied and baked on glass by screen printing to form an anode electrode and a cathode electrode in a row. A glass paste was screen-printed several times on the anode electrode and fired to form a partition having a height of about 200 μm. The partition is polished to make the height uniform, and a 50 μm thick microsheet (photoelastic constant 3.26 [brewster],
A glass frit was linearly applied to the periphery of (C × d = 0.163) and stuck on the partition walls. After firing, air is exhausted from the exhaust port at 10 ⁻⁶ Torr (1.33 × 10 ⁻⁴ Pa).
It was evacuated to a degree, and a rare gas was sealed up to several tens Torr (about 7 × 10 ³ Pa). The glass for a CF substrate has a photoelastic constant of 2.34 [brewster] and a thickness of 0.99 mm (C ×
d = 2.32) SF5 (manufactured by SCHOTT) was used.
On the CF substrate, signal electrodes were formed in stripes corresponding to RGB single color pixels using ITO for signal writing.

The formation of the wall, the formation of the alignment film, the hole for injecting the liquid crystal, the liquid crystal mixture, the method of controlling the axially symmetric alignment, and the bonding of the polarizing plate are the same as those in Example 1, and the description is omitted.

A comparative example will be described. The polarizing plate was placed in a crossed Nicols state, and AF45 glass (size: 640 × 1000 × 1.9 mmt, photoelastic constant: 3.times.
26, Cxd = 6.19): manufactured by SCHOTT). A backlight was applied from behind to measure the luminance in the black state. At that time, so that the temperature distribution does not occur in the glass,
The glass was viewed away from the backlight. Next, the same luminance measurement was performed by bringing the glass into close contact with the backlight so that heat distribution appeared in the glass.

The observation results of Examples 1 and 2 and Comparative Example will be described. The panels prepared as described in Examples 1 and 2 and Comparative Example were placed on a backlight and observed in an off state. Observation points are as follows. The entire liquid crystal panel is virtually divided into four parts in the vertical and six parts in the horizontal to form 24 regions. Was measured with a luminance meter (BM-5A: manufactured by Topcon Corporation). FIG. 3 shows the measurement results. As shown in the measurement results, when the luminance distribution is defined as maximum luminance / average luminance, Example 1 (C × d = 2.24, 0.163,
1.96), 1.43 times, Example 2 (C × d = 2.3)
1, 0.163, 2.32), it becomes 1.50 times, and in Examples 1 and 2, even if the backlight is thermally saturated, the luminance distribution becomes 1.5 times or less and light leakage occurs. Did not. On the other hand, the luminance distribution of the comparative example (C × d = 6.19) was 2.7 times, and light leakage occurred.

According to the present invention, even when a mechanical stress or a thermal stress is applied to the panel, the product of the photoelastic constant of the glass and the thickness of the glass is small. A liquid crystal display panel with high uniformity of black display and excellent display quality with little luminance unevenness was realized.

In the first and second embodiments, the plasma addressing type liquid crystal display device including the CF substrate, the plasma substrate, and the dielectric layer substrate has been described.
Similarly, a liquid crystal display device having a T substrate as a component can provide a liquid crystal display having a uniform black display and a high display quality.

[0065]

According to the present invention, by using a glass or the like in which the product of the photoelastic constant C and the thickness d of the glass is limited, light leakage at the time of black display can be prevented, and the black display can be prevented. A substrate for a liquid crystal display device and a liquid crystal display device that can be a liquid crystal display with high uniform display quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a PALC.

FIG. 2 is an explanatory diagram of a change characteristic of a photoelastic constant when a composition of glass is changed.

FIG. 3 is a table showing observation results of Examples 1 and 2 and Comparative Example.

DESCRIPTION OF SYMBOLS 11 Plasma substrate 12 Electrode 13 Electrode 14 Partition wall 21 Dielectric layer 22 Alignment film 31 CF substrate 32 Alignment film 33 Wall 34 Spacer 35 Liquid crystal layer 41, 42 Polarizer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H090 JA09 JB02 JB03 JD01 LA04 LA15 4G062 AA04 BB01 DA02 DB01 DC01 DD01 DE01 DF02 DF03 DF04 DF05 DF06 DF07 EA01 EB02 EB03 EB04 EB05 EB06 EC01 ED01 EE04 EE03 EE03 EG04 EG05 EG06 FA01 FA10 FB01 FC01 FD01 FE01 FF01 FG01 FH01 FJ01 FK01 FL01 GA01 GA10 GB01 GC01 GD01 GE01 HH01 HH03 HH05 HH07 HH09 HH11 HH13 HH15 HH17 HH20 JJ01 KK03 NN05 KK07 JJ05 KK07 JJ05 KK EB02 ED14 ED20

Claims (26)

[Claims] 1. The product of the thickness d _CF and the photoelastic constant C _CF is
A CF substrate for a liquid crystal display device having a value of 0 or more and 2.32 [brewster · mm] or less. 2. The substrate for a liquid crystal display device CF according to claim 1, wherein the material is glass or plastic. 3. The CF substrate for a liquid crystal display device according to claim 2, wherein said glass contains PbO at a component ratio of 0.1 wt% or more and 76.9 wt% or less. 4. The CF substrate for a liquid crystal display device according to claim 2, wherein said glass contains CaO in a component ratio of 0.1 wt% or more and 86.5 wt% or less. 5. The glass according to claim 1, wherein the glass contains 0.1 wt% of Na ₂ O.
The CF substrate for a liquid crystal display device according to claim 2, wherein the CF substrate has a component ratio of 51.9 wt% or less. 6. The CF substrate for a liquid crystal display device according to claim 2, wherein said glass contains BaO in a component ratio of 0.1 wt% or more and 63.5 wt% or less. 7. The product of the thickness d _PL and the photoelastic constant C _PL is:
A plasma substrate for a liquid crystal display device having a value of 0 or more and 2.32 [brewster · mm] or less. 8. The plasma substrate for a liquid crystal display device according to claim 7, wherein the material is glass or plastic. 9. The plasma substrate for a liquid crystal display device according to claim 8, wherein said glass contains PbO in a component ratio of 0.1 wt% or more and 76.9 wt% or less. 10. The glass contains 0.1% by weight of CaO.
The plasma substrate for a liquid crystal display device according to claim 8, wherein the plasma substrate has a component ratio of at least 86.5 wt% or less. 11. The glass contains 0.1 wt% of Na ₂ O.
9. The composition according to claim 8, wherein the component ratio is not less than 51.9% by weight.
A plasma substrate for a liquid crystal display device according to the above. 12. The glass according to claim 1, wherein the glass contains 0.1% by weight of BaO.
9. The plasma substrate for a liquid crystal display device according to claim 8, having a component ratio of at least 63.5 wt% or less. 13. The product of the thickness d _μ and the photoelastic constant C _μ is 0
A dielectric layer substrate for a liquid crystal display device having a value of 2.32 [brewster · mm] or less. 14. The dielectric layer substrate for a liquid crystal display device according to claim 13, wherein the material is glass or plastic. 15. The glass according to claim 1, wherein PbO is 0.1 wt%.
15. It has a component ratio of at least 76.9 wt%.
The dielectric layer substrate for a liquid crystal display device according to the above. 16. The above glass contains 0.1 wt% of CaO.
15. It has a component ratio of at least 86.5 wt% or less.
The dielectric layer substrate for a liquid crystal display device according to the above. 17. The glass according to claim 1, wherein the glass contains 0.1 wt% of Na ₂ O.
2. The composition according to claim 1, which has a component ratio of not less than 51.9% by weight and not more than 51.9% by weight.
5. The dielectric layer substrate for a liquid crystal display device according to 4. 18. The glass according to claim 1, wherein the glass contains 0.1 wt% of BaO.
15. It has a component ratio of 63.5 wt% or less.
The dielectric layer substrate for a liquid crystal display device according to the above. 19. A TFT substrate for a liquid crystal display device, wherein a product of a thickness d _TFT and a photoelastic constant C _TFT is 0 or more and 2.32 [brewster · mm] or less. 20. The TFT substrate for a liquid crystal display device according to claim 19, wherein the material is glass or plastic. 21. The above-mentioned glass contains 0.1 wt% of PbO.
21. The composition having a component ratio of at least 76.9 wt% or less.
The TFT substrate for a liquid crystal display device according to the above. 22. The glass according to claim 1, wherein the glass contains 0.1% by weight of CaO.
21. The composition having a component ratio of at least 86.5 wt% or less.
The TFT substrate for a liquid crystal display device according to the above. 23. The glass according to claim 1, wherein Na ₂ O is 0.1 wt.
3. The composition according to claim 2, which has a component ratio of not less than 51.9% by weight and not more than 51.9% by weight.
0. A TFT substrate for a liquid crystal display device according to 0. 24. The glass according to claim 1, wherein the glass contains 0.1% by weight of BaO.
21. It has a component ratio of 63.5 wt% or less.
The TFT substrate for a liquid crystal display device according to the above. 25. A plasma addressed liquid crystal display device comprising the CF substrate according to claim 1, the plasma substrate according to claim 7, and the dielectric layer substrate according to claim 13. 26. The CF substrate according to claim 1, wherein
A TFT liquid crystal display device comprising the TFT substrate described above as a component.