JPH08262399A - Color liquid crystal display device - Google Patents

Abstract

PURPOSE: To embody a bright and highly colorful multicolor display by coloring light without using color filters and displaying plural colors with the same pixels and displaying white and lack and three primary colors of red, green and blue, which are the basis of the display. CONSTITUTION: Polarizing plates 21, 22 are arranged across a liquid crystal cell 10 formed by subjecting liquid crystal molecules to 90 deg. twist orientation and two sheets of phase difference plates 23, 24 are arranged between a liquid crystal cell 10 and a front side of the polarizing plate 21. A reflection plate 20 is arranged on the rear surface side of the rear side polarizing plate 22. The transmission axis of the front side polarizing plate 21 is set in a direction of 120 to 130 deg., the transmission axis of the rear side polarizing plate 22 in a direction 150-150 deg., the delay axis of the one phase difference plate 23 in a direction of 40 to 50 deg. and the delay axis of the other phase difference plate 24 in a direction of 130 to 150 deg. with the liquid crystal molecule orientation direction of the liquid crystal cell 10 on the rear surface side substrate 11 and the value of Δnd of the liquid crystal cell 10 is set at 800 to 900nm, the value of retardation of the one phase difference plate 23 at 550 to 600nm and the value of retardation of the other phase difference plate 24 at 400 to 450nm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display device for obtaining a colored display without using a color filter.

[0002]

2. Description of the Related Art As a color liquid crystal display device capable of providing a colored display, one that colors light using a color filter is generally used. However, since this color liquid crystal display device uses a color filter to color light, it has a problem that the light transmittance is low and the display is dark.

This is due to the absorption of light by the color filter, and the color filter absorbs not only the wavelength light outside the wavelength band corresponding to the color but also the light in the wavelength band at a considerably high absorption rate. Therefore, the colored light that has passed through the color filter becomes light in which the light intensity is significantly reduced compared to the light in the wavelength band before entering the color filter, and the display becomes dark.

The liquid crystal display device has a transmissive type which uses the light from the backlight for display, and an external light (natural light, indoor illumination light, etc.) which is arranged on the back side. There is a reflection type that reflects and displays with a reflection plate, but when the above color liquid crystal display device is a reflection type, light that enters from the front surface side, is reflected by the reflection plate on the back surface side and is emitted to the front surface side is displayed. Since the light intensity is doubly reduced by passing through the color filter twice, the display becomes extremely dark and almost unusable as a display device.

Moreover, in the above color liquid crystal display device, since the display color of each pixel is determined by the color of the color filter corresponding to that pixel, in order to display many colors,
For example, it is necessary to obtain a desired display color by controlling the light transmission of each pixel by forming a set of three pixels corresponding to the color filters of the three primary colors of red, green and blue. The intensity of light is significantly weakened and the display color is dark.

On the other hand, as a conventional color liquid crystal display device for obtaining a colored display without using a color filter, an EC
A B-type (birefringence effect type) liquid crystal display device is known.
In this ECB type liquid crystal display device, a liquid crystal cell sandwiching a liquid crystal between a pair of substrates is sandwiched, and a polarizing plate is arranged on each of the front surface side and the back surface side of the liquid crystal cell. , The linearly polarized light that has passed through one of the polarizing plates and becomes incident light becomes elliptically polarized light with different polarization states due to the birefringence effect of the liquid crystal layer in the process of passing through the liquid crystal cell, and the other light The light incident on the polarizing plate of 1 and transmitted through the other polarizing plate becomes colored light having a color corresponding to the ratio of the light intensities of the respective wavelength lights forming the light.

That is, the ECB type liquid crystal display device is
Light is colored by utilizing the birefringence effect of the liquid crystal layer of the liquid crystal cell and the polarization effect of the pair of polarizing plates without using a color filter. Therefore, there is no absorption of light by the color filter. It is possible to obtain a bright color display by increasing the transmittance.

Moreover, in the above ECB type liquid crystal display device, the birefringence of the liquid crystal layer changes depending on the alignment state of the liquid crystal molecules according to the voltage applied between the electrodes of the two substrates of the liquid crystal cell, and accordingly the other birefringence is Since the polarization state of each wavelength light entering the polarizing plate changes, the color of the colored light can be changed by controlling the voltage applied to the liquid crystal cell, and therefore, the same pixel displays multiple colors. be able to.

[0009]

However, in the conventional ECB type liquid crystal display device, white and black which are the basics of display cannot be obtained, and red, green and blue which are the three primary colors of light can be displayed. Therefore, it is impossible to display full-color or multi-color with rich colors called multi-color.

According to the present invention, light can be colored without using a color filter, and a plurality of colors can be displayed by the same pixel. Moreover, white and black, which are the basics of display, and red,
It is an object of the present invention to provide a color liquid crystal display device capable of displaying three primary colors of green and blue to realize a clear and rich multicolor display.

[0011]

A color liquid crystal display device of the present invention includes a liquid crystal cell in which a liquid crystal is sandwiched between a pair of substrates having electrodes, and a liquid crystal cell sandwiched between the front surface side and the back surface side. The front side polarizing plate and the back side polarizing plate arranged, the two retardation plates arranged to be laminated between the front side polarizing plate and the liquid crystal cell, and the back side of the back side polarizing plate. And a liquid crystal molecule of the liquid crystal cell, the molecules of the liquid crystal of the liquid crystal cell are twist-aligned at a twist angle of approximately 90 ° from the rear surface side substrate of the liquid crystal cell to the front surface side substrate, and the rear surface side substrate of the liquid crystal cell is formed. When the alignment direction of the liquid crystal molecules above is 0 °, the transmission axis or the absorption axis of the front-side polarizing plate is 120 ° to 130 ° in the direction opposite to the twist direction of the liquid crystal molecules viewed from the surface side, The transmission axis of the back side polarizing plate Indicates that the absorption axis is in the direction of 150 ° to 170 ° in the opposite direction to the liquid crystal molecule twist direction, and the slow axis or the fast axis of one retardation plate is 40 ° in the direction opposite to the liquid crystal molecule twist direction. ˜50 °, and the slow axis or the fast axis of the other retardation plate is in the direction of 130 ° to 150 ° opposite to the liquid crystal molecule twist direction, and the refractive index of the liquid crystal of the liquid crystal cell is different. The value of the product Δnd of the directionality Δn and the liquid crystal layer thickness d is 800 nm to 900 nm, the retardation value of the one retardation plate is 550 nm to 600 nm,
The retardation value of the other retardation plate is 400 nm
It is characterized by being set to ˜450 nm.

[0012]

The color liquid crystal display device of the present invention utilizes external light and reflects the light incident from the front surface side by the reflection plate disposed on the back surface side for display. The incident light from the side is transmitted through the front-side polarizing plate to become linearly polarized light, and the light is sequentially transmitted through the two retardation plates and the liquid crystal cell and is incident on the back-side polarizing plate, and is also transmitted through this back-side polarizing plate. The light is reflected by the reflection plate, sequentially passes through the back side polarizing plate, the liquid crystal cell, the two retardation plates and the front side polarizing plate, and is emitted to the front side.

Then, in a non-selected state (a state in which the liquid crystal molecules are in the initial twist alignment state) in which a voltage for rising and aligning the liquid crystal molecules is not applied between the electrodes of the liquid crystal cell, the light passes through the front side polarizing plate and is incident. In the process of passing the linearly polarized light passing through the two retardation plates and the liquid crystal cell, the polarization state can be changed by the birefringence action of the liquid crystal layer of each retardation plate and the liquid crystal cell, and each wavelength light has an ellipse with a different polarization state. Light that has become polarized light and enters the back-side polarizing plate, and the light that has passed through this back-side polarizing plate becomes colored light of a color that corresponds to the ratio of the light intensities of the light components of that wavelength. The light is reflected by the reflection plate and emitted to the front surface side of the liquid crystal display device.

When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence action of the liquid crystal layer changes due to the change in the alignment state of the liquid crystal molecules due to the voltage, and the polarization of the light incident on the back side polarizing plate accordingly. Since the state changes, the coloring of the light changes according to the ratio of the light intensities of the light beams of the respective wavelengths that pass through this back-side polarizing plate, and the light is reflected by the reflector and emitted to the front surface side of the liquid crystal display device.

As described above, the color of the emitted light of this color liquid crystal display device, that is, the display color, changes depending on the voltage applied to the liquid crystal cell. Then, the twist angle of the liquid crystal molecules of the liquid crystal cell, the direction of the transmission axis or the absorption axis of the front and back polarizing plates, and the direction of the slow axis or the fast axis of the two retardation plates are set as described above. Further, when the Δnd of the liquid crystal cell and the retardation of each retardation plate are set to the above values, the change of the display color due to the change of the applied voltage to the liquid crystal cell 10 is changed to the three primary colors of red, green, blue and black. The change includes white and white.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a color liquid crystal display device of this embodiment. This liquid crystal display device includes a liquid crystal cell 10 and front side polarizing plates arranged on the front surface side and the back surface side of the liquid crystal cell 10. 21 and the back side polarizing plate 22, two retardation plates 23 and 24 which are laminated between the front side polarizing plate 21 and the liquid crystal cell 10, and are arranged on the back side of the back side polarizing plate 22. And a reflective plate 20. The reflection plate 20 is an omnidirectional reflection plate in which a metal film such as silver or aluminum is deposited on the surface of a base sheet made of a resin film or the like.

The liquid crystal cell 10 has transparent electrodes 13 and 14 made of an ITO film or the like, on which alignment films 15 and 16 are formed.
A pair of transparent substrates (for example, glass substrates) 11 on which
A nematic liquid crystal 18 is sandwiched between 12 and molecules of the nematic liquid crystal are twisted between the substrates 11 and 12, and the substrates 11 and 12 are bonded to each other via a frame-shaped sealing material 17. Is sealed in a region surrounded by the sealing material 17 between the two substrates 11 and 12.

The liquid crystal cell 10 is of an active matrix type using TFTs (thin film transistors) as active elements, for example, and a plurality of electrodes 13 formed on a substrate 11 on the back side thereof are arranged in rows and columns. The pixel electrodes, and the electrodes 14 formed on the substrate 12 on the front side are counter electrodes in the form of a single film facing all of the pixel electrodes 13.

Although not shown in FIG. 1, on the substrate 11 on which the pixel electrodes 13 are formed, a plurality of TFTs respectively connected to the pixel electrodes 13 and gate wirings for supplying gate signals to the TFTs in each row are provided. And data wiring for supplying a data signal to the TFTs in each column.

Further, the alignment films 15 and 16 provided on both the substrates 11 and 12 are horizontal alignment films made of polyimide or the like, and the alignment films 15 and 16 are subjected to alignment treatment (rubbing treatment) in directions substantially orthogonal to each other. The molecules of the liquid crystal 18 are regulated by the alignment films 15 and 16 in the alignment direction on both the substrates 11 and 12 (on the alignment films 15 and 16), and a slight pretilt with respect to the surfaces of the alignment films 15 and 16. In a state of being inclined at an angle, the two substrates 11 and 12 are twist-aligned at a twist angle of approximately 90 °.

FIG. 2 shows both substrates 11 and 12 of the liquid crystal cell 10.
Liquid crystal display of the orientation direction of the liquid crystal molecules and the optical axes of the respective polarizing plates 21 and 22 and the retardation plates 23 and 24 (transmission axis or absorption axis in the polarizing plate, slow axis or fast axis in the retardation plate) FIG. 3 is a view as seen from the front side of the device, and in this embodiment, the front and back polarizing plates 21 and 22 are arranged on the transmission axis 21 thereof.
a and 22a are arranged in the following directions, and two retardation plates 23 and 24 are arranged with their slow axes 23a and 24a being in the following directions.

As shown in FIG. 2, liquid crystal molecule orientation directions 11a and 12a on both substrates 11 and 12 of the liquid crystal cell 10 are shown.
Are substantially orthogonal to each other, and the liquid crystal molecules rotate clockwise (clockwise in the figure) when viewed from the front surface side from the rear surface side substrate 11 to the front surface side substrate 12, as indicated by the broken line arrow. It is twist-oriented at a twist angle of approximately 90 °.

When the liquid crystal molecule orientation direction 11a on the back surface side substrate 11 of the liquid crystal cell 10 is set to 0 °, the transmission axis 21a of the front side polarizing plate 21 is opposite to the liquid crystal molecule twist direction as seen from the front side. Direction (counterclockwise in the figure) is approximately 125 °, and the transmission axis 22a of the back side polarizing plate 22
Is approximately 160 in the direction opposite to the twist direction of the liquid crystal molecules.
It is in the direction of °.

Of the two phase difference plates 23 and 24,
The slow axis 23a of the first retardation plate 23 adjacent to the front-side polarizing plate 21 is in a direction substantially 45 ° opposite to the liquid crystal molecule twist direction with respect to the direction of 0 ° described above.
The slow axis 24a of the second retardation plate 24 adjacent to 0 is approximately 140 ° in the direction opposite to the liquid crystal molecule twist direction with respect to the 0 ° direction.

In the liquid crystal cell 10, the product Δnd of the refractive index anisotropy Δn of the liquid crystal 18 and the liquid crystal layer thickness d has a value of about 83.
The first retardation plate 2 is designed to have a thickness of 0 nm.
No. 3 has a retardation value of about 570 nm, and the second retardation plate 24 has a retardation value of about 430 nm.

Further, in this embodiment, as the front side polarizing plate 21, a polarizing plate having a low degree of polarization with respect to light in the short wavelength region of visible light (light of blue component) is used, and the back side polarizing plate 2
For 2, a polarizing plate with a normal degree of polarization is used. The average polarization degree of the front side polarizing plate 21 with respect to light in the visible light region is about 94%, and the average polarization degree of the back side polarizing plate 22 is about 99%.
Is.

This color liquid crystal display device utilizes outside light, and the light incident from the front side is arranged on the back side of the reflection plate 2.
This liquid crystal display device reflects the light at 0, and the electrodes 13 and 14 of both substrates 11 and 12 of the liquid crystal cell 10 are displayed.
A display is driven by applying a voltage between them.

In this color liquid crystal display device, incident light from the surface side thereof passes through the front side polarizing plate 21 to become linearly polarized light, and the light sequentially passes through the two retardation plates 23 and 24 and the liquid crystal cell 10. The light that has passed through and entered the back side polarizing plate 22 is reflected by the reflection plate 20, and the back side polarizing plate 22, the liquid crystal cell 10, the two phase difference plates 24 and 23, and the front side. The light is sequentially transmitted through the polarizing plate 21 and emitted to the front surface side.

Then, in a non-selected state (a state in which the liquid crystal molecules are in the initial twist alignment state) in which a voltage for rising and aligning the liquid crystal molecules is not applied between the electrodes 13 and 14 of the liquid crystal cell 10, the front side polarizing plate 21 is placed. In the process in which the linearly polarized light that is transmitted and incident passes through the two retardation plates 23 and 24 and the liquid crystal cell 10, the polarization state is changed by the birefringence action of each of the retardation plates 23 and 24 and the liquid crystal layer of the liquid crystal cell 10. Each wavelength light becomes elliptically polarized light having a different polarization state, enters the back side polarizing plate 22, and the light transmitted through the back side polarizing plate 22 is the light of each wavelength light forming the light. Colored light of a color corresponding to the intensity ratio is obtained, and the light is reflected by the reflection plate 20 and emitted to the front surface side of the liquid crystal display device.

The light reflected by the reflector 20 is
In the process of exiting to the front surface side, the liquid crystal layer of the liquid crystal cell 10 and the phase difference plates 23 and 24 are subjected to birefringence action opposite to that at the time of incidence, and become substantially the same linear polarized light as at the time of incidence to the surface side polarizing plate 21. Since the light is incident, the light that passes through the front-side polarizing plate 21 and exits is colored light that is almost the same as the light reflected by the reflector 20.

When a voltage is applied between the electrodes 13 and 14 of the liquid crystal cell 10, the liquid crystal molecules are vertically aligned while maintaining the twist alignment state, and the birefringence action of the liquid crystal layer is changed by the change of the alignment state of the liquid crystal molecules. To do. The birefringence effect of the liquid crystal layer becomes smaller as the rising angle of the liquid crystal molecules becomes larger.

When the birefringence effect of the liquid crystal layer of the liquid crystal cell 10 changes, the retardation plates 23 and 2 are changed accordingly.
4 and the liquid crystal cell 10 and incident on the back-side polarizing plate 22 changes its polarization state.
The coloring of the light changes according to the ratio of the light intensity of each wavelength light passing through the light, and the light is reflected by the reflection plate 20 and emitted to the front surface side of the liquid crystal display device.

As described above, the color of the emitted light of this color liquid crystal display device, that is, the display color, changes depending on the voltage applied to the liquid crystal cell 10. The colors that can be displayed by one pixel of this color liquid crystal display device include all of the three primary colors of red, green, and blue, black that is a nearly achromatic dark display, and white that is a nearly achromatic bright display. .

That is, as in this embodiment, the twist angles of the liquid crystal molecules of the liquid crystal cell 10, the directions of the transmission axes 21a and 22a of the front and back side polarizing plates 21 and 22, and the two retardation plates 23 and 24. The direction of the slow axes 23a and 24a of FIG.
And the value of Δnd of the liquid crystal cell 10 is about 830 nm, the retardation value of the first retardation plate 23 is about 570 nm, and the retardation value of the second retardation plate 24 is about In the color liquid crystal display device having a thickness of 430 nm, the change in the display color due to the change in the voltage applied to the liquid crystal cell 10 is a change including red, green, blue, and black and white. Note that these display colors are the same as those of the liquid crystal cell 10.
Red → green →
Obtained in the order of blue → black → white.

Therefore, according to the above color liquid crystal display device, light can be colored without using a color filter to obtain a bright color display, and a plurality of colors can be displayed in the same pixel. In addition to displaying white and black, which are the basics of display, the three primary colors of red, green, and blue are also displayed, so that a clear and rich multicolor display can be realized.

The display color is the color of one pixel. However, in the color liquid crystal display device, in addition to the display colors of the individual pixels, a combination of the display colors of a plurality of adjacent pixels is combined. It is also possible to express colors.

Further, in the conventional ECB type liquid crystal display device,
In order to display a plurality of colors, it is necessary to use a liquid crystal cell having a large Δnd value.
Since the light is colored by utilizing the birefringence effect between the two retardation films 23 and 24 and the liquid crystal layer of the liquid crystal cell 10, the value of Δnd of the liquid crystal cell 10 is about 830 nm as described above.
And can be relatively small.

The fact that the value of Δnd of the liquid crystal cell 10 may be small means that one or both of the refractive index anisotropy Δn of the liquid crystal 18 and the liquid crystal layer thickness d can be made small, and the liquid crystal layer thickness d. Is smaller, the strength of the electric field applied to the liquid crystal layer is higher, and the viscosity of the liquid crystal having smaller Δn is low, so that the response becomes faster and the threshold voltage also lowers.

Therefore, the color liquid crystal display device can display a plurality of colors with a lower applied voltage than the conventional ECB type liquid crystal display device, and the retardation of the retardation plates 23 and 24 can be obtained. Since the value of is larger than that of an ordinary retardation plate, a large birefringence effect can be obtained by these retardation plates 23 and 24, so that many colors can be displayed and the color purity can be improved. .

Further, in the above-mentioned embodiment, a polarizing plate having a low degree of polarization with respect to light in the short wavelength region of the visible light region is used as the front side polarizing plate 21 on which the incident light to the liquid crystal display device first enters. Therefore, it is possible to increase the incident amount of the light in the short wavelength range, that is, the light of the blue component, and display blue, which is difficult to be displayed as a display color, in a bright and clear color.

Moreover, in the color liquid crystal display device, since the two retardation plates 23 and 24 are disposed on the front surface side of the liquid crystal cell 10, the viewing angle dependence of the light emission rate is determined by the retardation plates 23 and 24. It can be reduced by 24, and therefore, the viewing angle at which the displayed image can be viewed brightly and with good contrast can be widened.

In the above embodiment, two retardation plates 2 are used.
Of 3, 24, the retardation plate 23 having the larger retardation value is arranged adjacent to the front polarizing plate 21, and the retardation plate 24 having the smaller retardation value is arranged adjacent to the liquid crystal cell 10. On the contrary, the retardation plate 24 having a smaller retardation value may be disposed adjacent to the front polarizing plate 21, and the retardation plate 23 having a larger retardation value may be disposed adjacent to the liquid crystal cell 10. .

Furthermore, in each of the above embodiments, the directions of the transmission axes 21a and 22a of the front and back polarizing plates 21 and 22 are set to
The directions of the slow axes 23a and 24a of the two retardation plates 23 and 24 are set as shown in FIG.
The direction of the transmission axes 21a and 22a of the two may be the direction of the absorption axis, and the slow axes 23a and 2 of the retardation plates 23 and 24 may be the same.
The direction of 4a may be the direction of the fast axis.

The directions of the optical axes of the polarizing plates 21 and 22 and the phase difference plates 23 and 24, the value of Δnd of the liquid crystal cell 10 and the retardation values of the phase differences 23 and 24 are as follows.
The present invention is not limited to the above-mentioned embodiments, and when the alignment direction 11a of liquid crystal molecules on the back surface side substrate 11 of the liquid crystal cell 10 is set to 0 °, the transmission axis or the absorption axis of the front side polarizing plate 21 is the front side. The direction of 120 ° to 130 ° in the direction opposite to the twist direction of the liquid crystal molecules, and the transmission axis or the absorption axis of the back side polarizing plate 22 is in the direction of 150 ° to 170 ° in the direction opposite to the twist direction of the liquid crystal molecules. Two retarders 2
One of the retardation plates 3, 24 has a slow axis or a fast axis of 40 ° to 5 in a direction opposite to the liquid crystal molecule twist direction.
0 ° direction, the slow axis or the fast axis of the other retardation plate is
130 ° to 15 ° in the direction opposite to the twist direction of the liquid crystal molecules.
In the direction of 0 °, the value of Δnd of the liquid crystal cell 10 is 800
nm to 900 nm, the retardation value of the one retardation plate is 550 nm to 600 nm, and the retardation value of the other retardation plate is in the range of 400 nm to 450 nm, white and black, which are the basics of display, and red. By displaying the three primary colors of green, green, and blue, it is possible to realize a clear and colorful multicolor display.

Although the active matrix type liquid crystal cell 10 is used in the above embodiment, the liquid crystal cell 10 may be a simple matrix type or a segment type. Good.

[0046]

According to the color liquid crystal display device of the present invention, light is colored without using a color filter to obtain a bright color display, and a plurality of colors and achromatic white and black are formed in the same pixel. It is possible to display, and moreover, by displaying white and black which are the basics of display and the three primary colors of red, green and blue,
It is possible to realize a multicolor display that is clear and rich in color.

[Brief description of drawings]

FIG. 1 is a sectional view of a color liquid crystal display device showing an embodiment of the present invention.

FIG. 2 is a diagram showing the alignment direction of liquid crystal molecules on both substrates of the liquid crystal cell and the orientations of the optical axes of each polarizing plate and the retardation plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Liquid crystal cell 11a ... Liquid crystal molecule alignment direction on a back surface side substrate 12a ... Liquid crystal molecule alignment direction on a front surface side substrate 20 ... Reflector plates 21, 22 ... Polarizing plates 21a, 22a ... Transmission axis 23, 24 ... Phase difference plate 23a , 24a ... Slow axis

Claims (1)

[Claims] 1. A liquid crystal cell in which a liquid crystal is sandwiched between a pair of substrates on which electrodes are formed, and a front side polarizing plate and a back side polarizing plate which are arranged on the front side and the back side of the liquid crystal cell.
The retardation plate is arranged between the front-side polarizing plate and the liquid crystal cell and is laminated on each other, and the reflection plate is disposed on the back side of the back-side polarizing plate. The molecules are twisted at a twist angle of approximately 90 ° from the back side substrate of the liquid crystal cell to the front side substrate, and the orientation direction of the liquid crystal molecules on the back side substrate of the liquid crystal cell is 0 °. Then, the transmission axis or the absorption axis of the front side polarizing plate is 120 ° to 130 ° in the direction opposite to the liquid crystal molecule twist direction viewed from the front side, and the transmission axis or the absorption axis of the back side polarizing plate is A direction of 150 ° to 170 ° in a direction opposite to the liquid crystal molecule twist direction, and a slow axis or a fast axis of one retardation plate is in a direction of 40 ° to 50 ° in a direction opposite to the liquid crystal molecule twist direction. , The slow axis of the other retarder or The phase axis is in the direction of 130 ° to 150 ° opposite to the twist direction of the liquid crystal molecules, and the product Δnd of the refractive index anisotropy Δn of the liquid crystal of the liquid crystal cell and the liquid crystal layer thickness d has a value of 800 nm to 900 nm, the retardation value of the one retardation plate is 550 nm to 600 n
m, the retardation value of the other retardation plate is 400
A color liquid crystal display device, wherein the color liquid crystal display device is set to nm to 450 nm.