JPH10153771A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device with a stereoscopic image display function, which has a low power consumption and is thin and lightweight. SOLUTION: Polarizing layers 14 and 15 and a phase difference layer 18 are formed on the inside surface of an opposite substrate 102, and a pixel electrode 25 provided on the inside surface of an active matrix substrate 101 is used as a light reflecting layer. The axis of polarization of polarizing layers 14 and 15 cross each other and are arranged corresponding to right-eye pixels and left-eye pixels respectively. The phase difference layer 18 includes an area 16 which does not have a phase difference giving function and an area 17 which has the phase difference giving function, and those are arranged opposite the polarizing layer 14 and polarizing layer 15 respectively. Therefore, light which is made incident from the side of the opposite substrate 102 is reflected by the pixel electrode 25, passed through the polarizing layers 14 and 15, and projected form the side of the opposite substrate 102 as linear polarized light beams which are polarized in mutually different directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television device, a game machine, a personal computer, a CAD, and the like.
The present invention relates to a liquid crystal display device capable of displaying a three-dimensional image having a three-dimensional effect used in devices, medical monitor devices, portable information terminals, and the like.

[0002]

2. Description of the Related Art Attempts to reproduce a three-dimensional image or a three-dimensional image have been made for a long time. There are various types of methods for achieving this, including methods using laser holograms and the like. Among them, the following two systems are available as a high-quality stereoscopic image display system capable of displaying a moving image in three primary colors. Both methods are based on the principle of displaying images for the right eye and the left eye individually, and using the binocular parallax based on the left-right image shift to remind the observer of the sense of depth. is there.

[0003] The first method is a method in which images for the left and right eyes are made into linearly polarized light whose polarization directions are at an angle of 90 ° to each other, and observed through polarized glasses, so that a viewer can perceive a stereoscopic image. It is a method. In this scheme,
When performing the projection display, the right-eye image and the left-eye image are superimposed on the screen using two polarization projectors. In the case of direct-view display, images from two display devices are combined by a half mirror or a polarizing mirror.

The second method is to display images for both the left and right eyes in a time-division manner on a single display device, and to open and close glasses having an electric shutter function alternately in synchronization with the displayed image. This is a shutter glasses system for displaying a stereoscopic image. This method can be applied to both projection display and direct-view display.

[0005] In each of the above-described methods, the right-eye image and the left-eye image are both presented as two-dimensional images. As a means for displaying a two-dimensional image, a liquid crystal display (LCD), a cathode ray tube (CRT), a plasma display, or the like is used depending on the application.

[0006] Among them, the polarizing glasses method requires two display devices and a projection device in order to always simultaneously project two images having different polarization axes, so that it is expensive and the size of the whole device becomes large. Therefore, it was not suitable for home use.

In order to solve such a problem of the polarized glasses system, for example, Japanese Patent Application Laid-Open No. 58-184929 proposes a method of displaying a three-dimensional image using a single display device. In this method, a mosaic polarizing layer in which the polarization axes are orthogonal between adjacent pixels is brought into close contact with the outside of one display device (CRT or LCD), and an observer can display both left and right images presented by the display device. The two-dimensional image for the eye is observed through polarized glasses. Thereby, the observer can perceive the stereoscopic image. However, Japanese Patent Application Laid-Open No. 58-184929 discloses an LC display as a display device.
When D is used, the position where the mosaic polarizing layer is provided is not specified at all. Therefore, a method described in JP-A-58-184929 will be described below assuming that the polarizing layer is provided on the outer surface of the liquid crystal display device.

FIG. 8 is a conceptual diagram of a liquid crystal display device having a three-dimensional display function proposed in Japanese Patent Application Laid-Open No. 58-184929.

The display device main body 701 has a right-eye pixel 706 and a left-eye pixel 707 for displaying a right-eye image and a left-eye image, respectively. Pixels 706 and 707
The display screen is constituted by two types of polarizing layers 703 whose polarization axes are orthogonal to each other on the front surface of the display screen.
704 are arranged alternately. That is, the polarizing layer 70
Reference numerals 3 and 704 denote a right-eye pixel 706 and a left-eye pixel 70
7, and separates the image for the right eye and the image for the left eye. When observing the stereoscopic image, the observer operates the polarizing layer 703 disposed in front of the right-eye pixel 706.
Polarizing glasses 712 having a polarizing plate 712b for the right eye whose polarization axis coincides with that of the right eye, and a polarizing plate 712a for the left eye whose polarization axis coincides with the polarizing layer 704 disposed in front of the pixel 707 for the left eye. Thereby, the right and left eyes of the observer can observe only the corresponding images, and can see a three-dimensional image having a three-dimensional effect.

The display device main body 701 has a pair of glass substrates 702a and 702b arranged with a liquid crystal layer 705 interposed therebetween. One (left side in FIG. 8) glass substrate 702
The right-eye pixel 706 and the left-eye pixel 707 are formed on the liquid crystal layer 705 side of a, and an alignment film 710a is formed thereon. A polarizing plate 708 is provided on a side of the glass substrate 702a opposite to the liquid crystal layer 705. The liquid crystal layer 7 on the other glass substrate 702b
On the 05 side, a transparent electrode 709b and an alignment film 710b are formed in this order. Note that the periphery of the liquid crystal layer 705 is sealed with a seal member 711.

However, the conventional display device having such a configuration has the following problems.

As shown in FIG. 9, a glass substrate 702b is provided between the right-eye pixel 706 and the left-eye pixel 707 of the display device main body 701 and the right-eye polarization layer 703 and the left-eye polarization layer 704. Is interposed. For this reason, when the observer observes the display screen from the front direction, as shown by a dashed line in FIG. 9, a normal stereoscopic image can be observed. Moves up and down from the front direction, the right-eye pixel 706 may be observed through the left-eye polarizing layer 704 and the left-eye pixel 707 may be observed through the right-eye polarizing layer 703. In this case, a phenomenon (crosstalk) in which the images for the left and right eyes are mixed with the opposite eyes occurs, and a normal stereoscopic image cannot be obtained. In FIG. 9, for simplicity,
Some components of the display device main body 701 in FIG. 8 are omitted.

In order to solve the problem of crosstalk, Japanese Patent Application Laid-Open No. 62-135810 discloses a display device using a single transmissive liquid crystal display device, in which a glass substrate constituting the transmissive liquid crystal display device is used. It is proposed that a polarizing layer having a partially different polarization direction is provided on the inside. In this display device, the right-eye pixel and the left-eye pixel of the transmissive liquid crystal display element are adjacent to the right-eye polarization layer and the left-eye polarization layer, respectively. Therefore, even if the direction in which the observer observes the display screen moves up and down from the front direction of the display screen, the above-described crosstalk does not occur.
Therefore, the range in which a stereoscopic image can be viewed is not limited, and a display device capable of displaying a stereoscopic image with a wide viewing angle can be obtained.

[0014]

However, in a liquid crystal display device having a stereoscopic display function of a polarized glasses system, since a transmission type liquid crystal display element has been conventionally used, a light source (backlight) for illuminating the liquid crystal display element is used. Is required,
Power consumption increases. For this reason, for example, in a field of use of a battery such as a portable information terminal, there is a problem that the time that can be used by one charge is limited. In addition, since a transmissive liquid crystal display element requires an illumination light source, there is a problem in that the manufacturing cost of the display device increases.

The present invention has been made in view of the above situation, and has as its object to provide a thin and lightweight liquid crystal display device which does not require an illumination light source, has low power consumption, and has a three-dimensional display function which can be used for a long time. A liquid crystal display device which can be manufactured at low cost, eliminates crosstalk occurring when displaying a three-dimensional image, and achieves good display at a wide viewing angle, thereby expanding the field of use. It is to provide.

[0016]

A liquid crystal display device according to the present invention is a liquid crystal display device having a display screen comprising a plurality of pixels, the plurality of pixels including a right-eye pixel and a left-eye pixel. The device includes a first substrate having a first display electrode, and a second substrate having a second display electrode arranged to face the first display electrode of the first substrate. Board and
A polarizing layer provided on at least one of the first substrate and the second substrate; and a reflective film provided on one of the first substrate and the second substrate. The first layer is arranged so as to correspond to the pixel for the right eye.
And a second region arranged so as to correspond to the pixel for the left eye. In the first region,
The first polarized light is selectively transmitted, and in the second region, a second polarized light different from the first polarized light is selectively transmitted, thereby achieving the above object.

The polarizing layer is provided on the second substrate, and the first display electrode provided on the first substrate is a reflective display electrode which also functions as the reflective film. You may.

In one embodiment, the first polarized light transmitted through the first region of the polarizing layer and the second polarized light transmitted through the second region have polarization directions orthogonal to each other. Is linearly polarized light.

In another embodiment, the first polarized light transmitted through the first region of the polarizing layer and the second polarized light transmitted through the second region have opposite directions. Is circularly polarized light whose polarization direction is rotated.

In still another embodiment, the liquid crystal display device further includes an optical rotation layer or a phase difference layer disposed so as to correspond to at least one of the right-eye pixel and the left-eye pixel. .

In still another embodiment, the first
The substrate further includes a switching element connected to the first display electrode, and a wiring connected to the switching element. Alternatively, the first substrate further includes a switching element connected to the first display electrode, a wiring connected to the switching element, and an interlayer insulating film formed on the switching element and the wiring. And the first display electrode is formed on the interlayer insulating film so as to cover the switching element.

Preferably, the liquid crystal display device further includes a liquid crystal layer sandwiched between the first substrate and the second substrate, and includes an electric field control birefringence mode, a guest / host mode, Display is performed using any one of the twisted nematic modes.

In still another embodiment, the liquid crystal display device includes a liquid crystal layer sandwiched between the first substrate and the second substrate, and a liquid crystal layer on the first substrate and the second substrate. The alignment film further includes a liquid crystal molecule included in the liquid crystal layer, a region corresponding to the pixel for the right eye and a region corresponding to the pixel for the left eye. An orientation process is performed so as to be oriented in a direction perpendicular to the direction.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In a reflection type liquid crystal display device of Embodiment 1, a reflection type pixel electrode is provided on an active matrix substrate, and at least a polarization layer out of a polarization layer and a phase difference layer is provided on an inner surface of a counter substrate. A layer is provided, and light of different polarization states corresponding to the right-eye pixel and the left-eye pixel is emitted from the counter substrate side to display an image. Here, the pixels of the liquid crystal display device are divided into a plurality of groups including at least one pixel, and the pixels belonging to the same group are
It is assumed that the same image is displayed.

FIG. 1 is a sectional view showing a schematic configuration of a reflection type liquid crystal display device 100 according to the present embodiment.

The reflection type liquid crystal display device 100 has an active matrix substrate 101, a counter substrate 102, and a liquid crystal layer 21 interposed therebetween. The active matrix substrate 101 has a transparent insulating substrate 22, and a thin film transistor (TF) as a switching element is provided on the surface of the liquid crystal layer 21 side as shown in FIG.
T) 23 are provided in a matrix, and an interlayer insulating film 24 is provided thereon. Further, on the insulating film 24, for example, a reflective pixel electrode 25 made of a metal material such as Al or Ag is formed in a matrix, and is connected to the TFT 23 via a through hole provided in the insulating film 24, respectively. Have been. An alignment film 20 is formed thereon. The alignment film 20 is formed such that the liquid crystal molecules in contact therewith are aligned in the same direction over the entire display screen.
An orientation treatment has been performed.

FIG. 2 shows an active matrix substrate 101.
A more detailed configuration will be described. FIG. 2 shows a configuration for one pixel.

On the transparent insulating substrate 22, a gate electrode 26 connected to a gate signal wiring (not shown) is formed of, for example, Ta or Al. On the gate signal line and the gate electrode 26, for example, SiN or S
A gate insulating film 27 is formed from iO ₂ . On the gate insulating film 27 above the gate electrode 26, the TFT 2
Three semiconductor layers 28 are provided. As shown in FIG. 2, a contact layer 29 of the source electrode 30 and a contact layer 31 of the drain electrode 32 are formed on the semiconductor layer 28 with a gap therebetween. For example, an amorphous silicon (a-Si) layer is used as the semiconductor layer 28, and n ⁺ Si layers are used as the contact layers 29 and 31. Source electrode 30 is connected to a source signal wiring (not shown). Thus, the TFT 23 is completed.

The interlayer insulating film 24 is formed over the entire surface of the substrate 22 so as to cover the TFT 23, and as a material thereof, for example, a photosensitive organic material such as a photosensitive acrylic resin can be used. Drain electrode 3 of interlayer insulating film 24
2, a through hole is provided. Pixel electrodes 25 made of, for example, Al or Ag are formed in a matrix on the interlayer insulating film 24 so as to be connected to the drain electrodes 32 of the TFTs 23 via the through holes. When an alignment film 20 made of, for example, polyimide or the like is formed thereon and subjected to an alignment process, the active matrix substrate 101 is completed. The alignment film 2
The zero alignment process is performed so that the liquid crystal molecules in contact therewith are aligned in the same direction over the entire display screen.

Next, the configuration of the counter substrate 102 will be described.
A color filter 13 is formed on the inner surface of the transparent insulating substrate 11, that is, on the surface adjacent to the liquid crystal layer 21. The color filter 13 includes a color filter composed of red (R), green (G), and blue (B) pixels, and cyan (C), magenta (M), and yellow ( Y) A color filter composed of pixels or the like is used depending on the field in which the reflective liquid crystal display device 100 is used. On the color filter 13, the polarizing layer 1
4, 15 and the retardation layer 18 are provided.

The polarizing layers 14 and 15 have polarization axes 14a and 15a, respectively, which are orthogonal to each other, and are arranged such that one corresponds to the right-eye pixel group and the other corresponds to the left-eye pixel group. In the present embodiment, each pixel group includes one row of pixels (pixels corresponding to the same gate signal wiring) arranged in the horizontal direction, and each pixel row includes one pixel for the right eye and one pixel for the left eye. And assigned to. Therefore, the polarizing layers 14 and 15 are also arranged alternately for each pixel row (that is, in a stripe shape extending in the horizontal direction). The phase difference layer 18 includes a region 16 that does not provide a phase difference to the incident light and a region 17 that provides a phase difference. As shown in FIG. 1, the region 16 is a polarizing layer 14, and the region 17 is a polarizing layer. 15 are arranged. Therefore,
The regions 16 and 17 are also arranged alternately for each pixel row. Further, a region 1 having a phase difference providing function
7 is 45 degrees with respect to the polarization axis 15a of the corresponding polarization layer 15.
It has a slow axis shifted by ° and gives a phase difference of half a wavelength. By arranging the polarizing layers 14 and 15 and the regions 16 and 17 of the retardation layer 18 in a stripe shape extending in the horizontal direction, the resolution in the vertical direction is reduced to 1/1.
However, since the resolution in the horizontal direction does not decrease, the decrease in resolution when observing a stereoscopic image can be apparently reduced.

On the retardation layer 18, there are provided a transparent electrode 19 as a counter electrode, and an alignment film 20 which has been subjected to alignment processing in the same direction over the entire surface. Further, if necessary, an antireflection layer 12 for preventing ambient light from being reflected may be provided on the outer surface of the counter substrate 102.

The polarizing layers 14 and 15 of the counter substrate 102 are formed from a material in which a dichroic dye dye or iodide is mixed with a photo-alignment organic material. This material is applied on the substrate 11 to a predetermined film thickness, and a mask coated with a mask in which openings corresponding to one row of pixels provided in accordance with the pixel shape and light shielding portions are alternately arranged. In the state of being superimposed on top, linearly polarized ultraviolet (UV) light is irradiated. Thus, the portion irradiated with the UV light through the opening becomes a polarizing layer having a polarization axis along the polarization direction of the UV light. Next, the mask is arranged so that the UV light non-irradiated portion is located below the opening,
Irradiation is performed with linearly polarized UV light polarized in a direction different from that of the linearly polarized light by 90 °. Thus, pixel 1
It is possible to form a polarizing layer in which the polarizing axes alternately arranged for each row are different from each other by 90 °. For the production of this polarizing layer,
As described in JP-A-7-261024, a polymer material that undergoes a photoisomerization reaction (for example, a polymer having azobenzene as a side chain) and a dichroic dye can be used.

The retardation layer 18 is formed in a manner substantially similar to that of the polarizing layers 14 and 15. That is, a material for a retardation layer, for example, a photopolymerizable liquid crystal material is applied to a predetermined thickness on the substrate 11, and openings and light-shielding portions corresponding to one row of pixels are alternately arranged thereon. The linearly polarized UV light is irradiated in a state in which the opening mask corresponds to the portion which becomes the region 17 having the phase difference providing function, with the opening corresponding to the mask. As a result, a region 17 that gives a phase difference of half a wavelength having an optical axis along the polarization direction of the irradiated UV light is formed. For the production of this retardation layer, an ultraviolet-curable liquid crystal material exhibiting a nematic phase at room temperature disclosed in JP-A-8-29618 can be used.

The liquid crystal layer 21 is of a guest-host mode, and is formed by mixing a black p-type dye as a dichroic dye and a nematic liquid crystal material having a positive dielectric anisotropy. I have. Here, the alignment direction of the liquid crystal molecules and the dichroic dye molecules is determined by the light absorption axis of the dichroic dye molecules when the liquid crystal molecules and the dichroic dye molecules are aligned. It is set so as to be parallel to the polarization direction. Thus, when the TFT 23 is off, that is, when no electric field is applied to the liquid crystal layer 21, the polarized light incident on the liquid crystal layer 21 is absorbed by the dichroic dye molecules, and black display is performed. On the other hand, TF
When T23 is on, that is, when an electric field is applied to the liquid crystal layer 21, the orientation direction of the liquid crystal molecules and the dichroic dye molecules changes due to the electric field, and the polarized light incident on the liquid crystal layer 21 is changed by the dichroic dye molecules. The liquid crystal layer 21 without being absorbed
Through.

In the reflection type liquid crystal display device 100 having such a configuration, light from the surroundings is incident on the counter substrate 102 and the polarization directions are mutually changed by the polarizing layers 14 and 15 alternately arranged for each pixel row. It is converted to orthogonal linearly polarized light. Thereafter, by passing through the retardation layer 18, the polarization direction of one of the linearly polarized lights is aligned with the polarization direction of the other linearly polarized light, and reaches the liquid crystal layer 21 in that state. Therefore, the liquid crystal layer 21 can adjust the amount of transmitted light over the entire screen.

Specifically, when the TFT 23 is in the off state, light is absorbed and black display is performed. In contrast, T
When the FT 23 is in the ON state, the light passes through the liquid crystal layer 21 and is reflected by the reflective pixel electrode 25 of the active matrix substrate 101. The light follows the opposite optical path while maintaining the polarization direction. 18 is incident. here,
The light incident on the region 17 having the phase difference providing function of the phase difference layer 18 is provided with a phase difference of a half wavelength and has a polarization direction of 9.
The light is rotated by 0 °. Accordingly, linearly polarized light having a polarization direction orthogonal to each other is alternately emitted from the retardation layer 18 for each row of pixels, and the polarization layers 14 and 15 are polarized in directions matching the respective polarization axes. Linearly polarized light is incident. As a result, light corresponding to the image for the right eye and light corresponding to the image for the left eye are emitted from the opposite substrate 102 as linearly polarized light polarized in directions orthogonal to each other.

As described above, also in the reflection type liquid crystal display device 100 of the first embodiment, it is possible to alternately emit the right-eye image light and the left-eye image light for each pixel row. . In such a liquid crystal display device 100, when the observer wears polarizing glasses (not shown) provided with polarizing plates each having a polarizing axis corresponding to the polarizing axis of the polarizing layers 14 and 15, the viewer can see the counter substrate 102 side. Can observe a three-dimensional image. The display device 100 according to the first embodiment
Is a reflection type using ambient light, so that it is not necessary to use an illumination light source (backlight), and as a result, a stereoscopic image display device with low power consumption can be realized. Therefore, the applicable range of the liquid crystal display device having the function of displaying a stereoscopic image can be expanded.

In the reflection type liquid crystal display device 100 according to the first embodiment, an ordinary two-dimensional image can be displayed by applying an image signal to each pixel by a known method. In this case, the observer does not need to wear polarized glasses.

Further, the display device 100 of the first embodiment
Uses a pixel electrode provided inside the display device, that is, on the inner surface of the active matrix substrate 101, as a light reflection layer. Therefore, blurring of the pixel outline due to the thickness of the transparent insulating substrate 22 does not occur, and good display quality can be obtained.

In this embodiment, an example is described in which a switching element for driving a pixel is provided for each pixel, but the present invention is not limited to this. For example, the display may be performed in a twisted nematic mode or the like. When the display is performed in the guest host mode, it is necessary to increase the voltage on / off ratio at the time of driving the liquid crystal in order to increase the contrast ratio. However, in the first embodiment, the switching element is formed on the substrate. By doing so, the voltage on / off ratio at the time of driving the liquid crystal can be increased, the contrast ratio can be increased, and the display quality can be improved.

(Embodiment 2) Next, a reflective liquid crystal display device according to Embodiment 2 of the present invention will be described with reference to FIG.

FIG. 3 is a sectional view showing a schematic configuration of a reflection type liquid crystal display device 200 according to the second embodiment. Note that FIG.
, The same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

The reflection type liquid crystal display device 200 has an active matrix substrate 201, a counter substrate 202, and a liquid crystal layer 21 interposed therebetween. The configuration of the active matrix substrate 201 is the same as that of the first embodiment except for the alignment film 220. The alignment film 220
It includes regions 220a and 220b that have been subjected to different alignment treatments, and are arranged such that the region 220a corresponds to the right-eye pixel and the region 220b corresponds to the left-eye pixel. Also in the present embodiment, one row of pixels arranged in the horizontal direction is alternately used for the right eye and the left eye similarly to the first embodiment.
a and 220b are alternately arranged for each row of pixels. Note that the alignment processing of the regions 220a and 220b is performed by using the alignment film 22.
The alignment is performed so that the alignment directions of the liquid crystal molecules in contact with 0 are orthogonal to each other.

The structure of the counter substrate 202 is the same as that of the first embodiment, except that the phase difference layer is omitted and the structure of the alignment film 220 'is omitted. The alignment film 220 ′ is, like the alignment film 220 on the active matrix substrate 201 side,
An area 220a 'corresponding to the pixel for the right eye and an area 220b' corresponding to the pixel for the left eye are included. Region 220
The a ′ and the region 220b ′ are subjected to different alignment treatments so that the alignment directions of the liquid crystal molecules in contact with the alignment film 220 ′ are orthogonal to each other, and are alternately arranged for each pixel row. Therefore, the region 220a 'of the alignment film 220' is
0b 'will face area 220b. Note that the alignment direction of each region of the alignment films 220 and 220 ′ is determined by the opposite regions 220a and 220a ′ (or 220b).
And 220b ') are determined so as to regulate the alignment direction of the liquid crystal molecules 21a (or 21b) in the liquid crystal layer 21 interposed therebetween in the same direction.

As in the first embodiment, a liquid crystal material of a guest-host mode is used for the liquid crystal layer 21. Here, a black p-type dye as a dichroic dye and a positive dielectric anisotropy are used. It uses a mixture with a nematic liquid crystal material. Here, the liquid crystal molecules 21a between the region 220a of the alignment film 220 and the region 220a 'of the alignment film 220'
Is orthogonal to the alignment direction of the liquid crystal molecules 21b in the region 220b and the region 220b ′. In the entire display screen, regions of the liquid crystal layer having the orthogonal alignment direction are alternately formed for each pixel row. Is done. As a result, in both the right-eye pixel and the left-eye pixel, the polarization direction of light that has passed through the polarizing layers 14 and 15 of the counter substrate 202 and entered the liquid crystal layer 21 and an electric field is applied to the liquid crystal layer 21. The absorption axis of the dichroic dye molecules in the liquid crystal layer 21 in the absence state can be made parallel.

As an alignment treatment method for the alignment films 220 and 220 ', a photo alignment method was used. As the alignment material, for example, a photosensitive resin polyvinyl cinnamate is used as the substrate 22 of the active matrix substrate 201 and the substrate 1 of the opposing substrate 202.
1 is applied so as to have a predetermined film thickness, and a mask in which openings and light-shielding portions are alternately arranged for each row of pixels according to the pixel shape is overlaid on the applied alignment material. Then, ultraviolet (UV) light having linearly polarized light is irradiated vertically or obliquely. In this manner, regions 220a, 220b, 220a ', and 220b' having an alignment direction along the polarization direction of the irradiation light are formed.

In the reflection type liquid crystal display device 200 having such a configuration, the light from the surroundings incident from the counter substrate 202 passes through the polarizing layers 14 and 15 to form the pixel 1.
The light is alternately converted into linearly polarized light whose polarization direction is orthogonal to each other for each row, passes through the alignment film 220 ′, and enters the liquid crystal layer 21.
The alignment direction of the liquid crystal molecules of the liquid crystal layer 21 is determined by the polarization layers 14 and 15.
Are alternately orthogonal to each other for each pixel row so as to correspond to the polarization axis of, so that the amount of light transmitted through the liquid crystal layer 21 is adjusted over the entire screen by adjusting the orientation direction of the liquid crystal molecules and dichroic dye molecules. can do. Specifically, when the TFT is off, light is absorbed and black display is performed. On the other hand, when the TFT is in the ON state, light passes through the liquid crystal layer 21 and is reflected by the reflective pixel electrode 25.

The light reflected by the reflective pixel electrode 25 follows the opposite optical path while maintaining the polarization direction, and again enters the polarizing layers 14 and 15. Therefore, the polarizing layer 14,
The polarization axis of the light 15 coincides with the polarization direction of the light incident thereon, and the polarizing layers 14 and 15 transmit the incident light and emit the light from the counter substrate 202. In this way,
Light corresponding to the image for the right eye and light corresponding to the image for the left eye are emitted as linearly polarized light polarized in directions orthogonal to each other.

In such a liquid crystal display device 200, if the observer wears polarizing glasses (not shown) made of polarizing plates each having a polarizing axis corresponding to the polarizing axis of the polarizing layers 14 and 15, the counter substrate can be mounted. A three-dimensional image can be observed from the 202 side. In addition, the liquid crystal display device 200 can display a normal two-dimensional image by applying an image signal to each pixel by a known method. In this case,
The observer does not need to wear polarized glasses.

The display device 200 according to the second embodiment
Is a reflection type using ambient light, so that it is not necessary to use an illumination light source (backlight), and as a result, a stereoscopic image display device with low power consumption can be realized. Therefore, the field of use of the display device having the stereoscopic image display function can be expanded. Further, in the display device 200 according to the second embodiment, the pixel electrode 25 provided on the inner surface of the active matrix substrate 201 is used as a light reflection layer. Therefore, blurring of the pixel outline due to the thickness of the transparent insulating substrate 22 does not occur, and good display quality can be obtained.

In the second embodiment, the active matrix substrate emits linearly polarized light having different polarization directions from the right-eye pixel and the left-eye pixel. However, circularly polarized light may be emitted instead of linearly polarized light. In this case, as shown in FIG. 10, the light incident side (the transparent insulating substrate 11 side) of the polarizing layers 14 and 15 provided on the inner surface of the counter substrate 202 'has a function of a circularly polarizing filter. The retardation layer 218 is provided.

More specifically, it includes a region corresponding to the right-eye pixel (hereinafter, referred to as a right-eye region) and a region corresponding to the left-eye pixel (hereinafter, referred to as a left-eye region). The phase difference layer 218 is provided on the light incident side of the polarizing layers 14 and 15 such that the right eye region corresponds to the right eye polarizing layer 14 and the left eye region corresponds to the left eye polarizing layer 15. Deploy. At this time, the slow axis in the region for the right eye of the retardation layer 218 is arranged at an angle of 45 ° with respect to the polarization axis 14 a of the polarizing layer 14, and the slow axis in the region for the left eye is the polarization of the polarizing layer 15. 45 ° with respect to axis 15b in the direction opposite to that of the right-eye pixel
It is arranged at an angle. Therefore, the retardation layer 218 has a slow axis in the same direction in the right-eye region and the left-eye region. The phase difference between the right-eye region and the left-eye region is adjusted to be a quarter wavelength.

In the reflection type liquid crystal display device having such a configuration, the light is reflected by the reflection type pixel electrode 25, passes through the liquid crystal layer 21, and is emitted from the right eye polarization layer 14 and the left eye polarization layer 15. The light is linearly polarized light whose polarization directions are orthogonal. This light enters the retardation layer 218 and is converted into circularly polarized light having opposite rotation directions in the right eye region and the left eye region. In this way, for example, clockwise circularly polarized light is emitted from the right-eye pixel, and counterclockwise circularly polarized light is emitted from the left-eye pixel. By attaching polarizing glasses provided with polarizing plates to the left and right eyes, only the left-eye image and the right-eye image can enter the left and right eyes of the observer, respectively. In this case, even when the observer moves the head up and down or tilts, the images corresponding to both eyes enter. For this reason, crosstalk in which an image looks double does not occur, and the viewer can perceive a stereoscopic image with better display quality.

In the second embodiment, the case where the display is performed in the guest / host mode has been described as an example. Alternatively, for example, a twisted nematic mode may be used.

(Embodiment 3) Next, a third embodiment of the reflection type liquid crystal display device of the present invention will be described with reference to FIGS. In these drawings, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.

FIG. 4 is a sectional view showing a schematic configuration of a reflection type liquid crystal display device 300 according to the third embodiment.

The reflection type liquid crystal display device 300 has an active matrix substrate 301, a counter substrate 302, and a liquid crystal layer 21 interposed therebetween. The configuration of the active matrix substrate 301 is the same as that of the first embodiment except for the alignment film 320. The alignment film 320
As in the second embodiment, the region 320a includes regions 320a and 320b that have been subjected to different alignment treatments.
Corresponds to the pixel for the right eye, and the region 320b is arranged so as to correspond to the pixel for the left eye. Also in the present embodiment, as in Embodiments 1 and 2, one row of pixels arranged in the horizontal direction is alternately used for the right eye and the left eye, so that the regions 320a of the alignment film 320, 320b are also arranged alternately for each row of pixels. The area 320
The alignment processes a and 320b are performed such that the alignment directions of the liquid crystal molecules in contact with the alignment film 320 are orthogonal to each other.

The opposite substrate 302 has an inner surface (the liquid crystal layer 21).
A transparent insulating substrate 11 on which a color filter 13, polarizing layers 14, 15, a retardation layer 318, a counter electrode 19, and an alignment film 320 'are formed. Further, an antireflection layer 12 for preventing the reflection of ambient light may be provided on the outer surface as needed.

The color filter 13 includes a color filter composed of red (R), green (G), and blue (B) pixels, and cyan (C) and magenta (M) corresponding to the image display of the reflection type. , A color filter composed of yellow (Y) pixels is used depending on the field in which the reflection type liquid crystal display device 300 is used. The polarizing layers 14 and 15 are the same as those in the first embodiment.
As in the above, the polarization axes 14a and 15a are orthogonal to each other, and the polarization layer 14 alternates for each pixel row such that the polarization layer 14 corresponds to the right-eye pixel and the polarization layer 15 corresponds to the left-eye pixel. (That is, in a stripe shape extending in the horizontal direction). The polarizing layers 14 and 15 can be formed in the same manner as in the first embodiment.

The retardation layer 318 is composed of regions 316 and 317 having slow axes orthogonal to each other. This retardation layer 3
18 can be manufactured in the same manner as in the first embodiment. As shown in FIG. 4, the region 316 includes the polarizing layer 14.
And the region 317 is arranged so as to correspond to the polarizing layer 15. Therefore, the regions 316 and 317 are also alternately arranged for each pixel row. Further, the slow axis of the region 316 corresponds to the polarization axis 14a of the corresponding polarizing layer 14.
, And the slow axis of the region 317 is set to the polarization axis 15 a of the corresponding polarization layer 15.
, And is arranged to be rotated 45 ° clockwise with respect to.

On the retardation layer 18, a transparent electrode 19 as a counter electrode and an alignment film 320 'are provided.
The alignment film 320 'includes regions 320a' and 320b 'for aligning liquid crystal molecules in different directions. As shown in FIG. 4, these regions are alternately arranged for each row of pixels so as to correspond to the regions 320a and 320b of the alignment film 320 on the active matrix substrate 301 side. Here, the region 320a ′ has been subjected to an alignment process so as to align the liquid crystal molecules in a direction rotated 45 ° counterclockwise with respect to the polarization axis 14a of the corresponding polarization layer 14.
The region 320 b ′ corresponds to the polarization axis 1 of the corresponding polarization layer 15.
An alignment process is performed so that the liquid crystal molecules are aligned in a direction rotated 45 ° counterclockwise with respect to 5a. The facing regions of the alignment films 320 and 320 'are processed so that the liquid crystal molecules are aligned in the same direction.

FIG. 5 shows an optical configuration of the reflection type liquid crystal display device 300. The axis direction L2 of the slow axis in the corresponding region 316 (317) of the retardation layer 318 is θ1 in the clockwise direction with respect to the axis direction L1 of the polarization axis 14a (15a) of the polarizing layer 14 (or 15). Are arranged at an angle. Also, the liquid crystal molecules 321a in the corresponding region
The orientation direction L3 of (321b) is disposed at an angle of θ2 counterclockwise with respect to L1. In the present embodiment, as described above, θ1 = 45 ° and θ2 = 45 °.

As the alignment treatment method for the alignment films 320 and 320 ', a photo-alignment method was used as in the second embodiment.
As an alignment material, for example, a photosensitive resin polyvinyl cinnamate is applied on the substrate 22 of the active matrix substrate 301 and the substrate 11 of the counter substrate 302 so as to have a predetermined thickness, and an opening is provided for each pixel row according to the pixel shape. Ultraviolet (UV) light having linearly polarized light is irradiated vertically or obliquely in a state where a mask in which the portions and the light shielding portions are alternately arranged is superimposed on the applied alignment material. In this manner, the region 32 having the alignment direction along the polarization direction of the irradiation light
0a, 320b, 320a 'and 320b' are formed.

The liquid crystal layer 321 may be of an electric field controlled birefringence (ECB) mode. In the present embodiment, as a liquid crystal material having a positive dielectric anisotropy, ZL manufactured by Merck with a refractive index anisotropy Δn1 of 0.094 is used.
A liquid crystal layer 3 using I4792 and having a thickness d1 of 5.5 μm.
21 was formed. Therefore, the retardation Δn1 · d1 of the liquid crystal layer 321 is 517 nm. Correspondingly, the retardation layer 318 (optical anisotropy Δn2, thickness d
The retardation Δn2 · d2 of 2) has a wavelength λ of 550.
When light of nm is incident, (Δn1 · d1−Δn2 ·
d2) /λ=0.25. Specifically, Δn2 · d2 was set to 380 nm. This gives T
When the FT 23 is in the off state, the polarized light reflected by the reflective pixel electrode 25 of the active matrix substrate 301 cannot pass through the polarizing layers 14 and 15, so that a black display is obtained. The polarized light reflected by the electrode 25 is
15 can be passed, so that white display is obtained. In addition,
The setting of the value of (Δn1 · d1−Δn2 · d2) / λ is not limited to the above-described numerical value, but may be set to any value as long as it can realize monochrome display.

FIG. 6 is a diagram for explaining the operation principle of the reflective liquid crystal display device 300 according to the fourth embodiment. For convenience of explanation, the liquid crystal display device 300 is exploded. FIG.
In the light-shielding state shown in (a), when the incident light 10 passes through the polarizing layer 14, it becomes linearly polarized light 61 having a polarization direction parallel to the polarization axis direction L1 of the polarizing layer 14. The linearly polarized light 61 passes through the region 316 of the retardation layer 318 and the liquid crystal layer 321, and becomes, for example, clockwise circularly polarized light 63. This circularly polarized light 6
3 is reflected by the reflective pixel electrode 25 and becomes a counterclockwise circularly polarized light 64. When the circularly polarized light 64 passes through the liquid crystal layer 321 having retardation as described above and the region 316 of the retardation layer 318, it becomes linearly polarized light 62 having a polarization direction orthogonal to the polarization direction of the linearly polarized light 61. For this reason, the linearly polarized light 62 cannot pass through the polarizing layer 14 and displays black. When the light passing through the liquid crystal layer 321 and entering the reflective pixel electrode 25 is counterclockwise circularly polarized light, the light reflected by the pixel electrode 25 becomes clockwise circularly polarized light.

On the other hand, in the light transmitting state shown in FIG.
The TFT 23 is turned on, and a voltage is applied to the liquid crystal layer 321. As a result, the orientation of the liquid crystal molecules 321a is such that the retardation relationship between the retardation layer 318 and the liquid crystal layer 321 is (Δn1 · d1−Δn2 · d2) /λ=0±0.1.
It changes to satisfy. In this state, the polarizing layer 14
Linearly polarized light 61 having a polarization direction parallel to the polarization axis 14a
Is the region 3 of the retardation layer 318 while maintaining the polarization state.
16 and the liquid crystal layer 321. The polarization state of the linearly polarized light 61 is maintained even when the linearly polarized light 61 is reflected by the reflective pixel electrode 25, and is further maintained while the linearly polarized light 61 passes through the liquid crystal layer 321 and the region 316 of the retardation layer 318. Therefore, in this state, the reflected light from the reflective pixel electrode 25 passes through the polarizing layer 14 and is emitted, so that white display is performed.

As described above, also in the reflection type liquid crystal display device 300 of the third embodiment, the light corresponding to the image for the right eye and the light corresponding to the image for the left eye are linearly polarized in directions orthogonal to each other. The polarized light is emitted from the counter substrate 302 side. Therefore, the observer can observe a three-dimensional image from the counter substrate 302 side by wearing polarizing glasses (not shown) made of polarizing plates each having a polarizing axis corresponding to the polarizing axis of the polarizing layers 14 and 15. Can be. When the observer does not wear polarized glasses, the observer observes a two-dimensional image.

In the third embodiment, since the display is performed in the electric field control birefringence (ECB) mode, it is also possible to perform the gradation display.

In the third embodiment, since a three-dimensional image is displayed by a reflection type liquid crystal display device using ambient light, it is not necessary to use an illumination light source (backlight). An image display device can be realized. Therefore, the field of use of the display device having the stereoscopic image display function can be expanded. Further, since the polarizing layer and the retardation layer are formed on the inner surface of the opposing substrate, crosstalk due to the thickness of the transparent insulating substrate does not occur, and good display quality can be obtained. Further, by adopting a configuration in which a switching element is formed,
Since the voltage on / off ratio at the time of driving the liquid crystal can be increased, the contrast ratio can be improved, and the display quality can be improved.

Further, by providing a liquid crystal display device with a retardation layer having a retardation function, the types of display modes that can be used can be increased. For example, in the reflective liquid crystal display device 300 according to the third embodiment,
In addition to electric field control birefringence mode, guest / host mode,
Alternatively, a twisted nematic mode can be used, and the setting of each component of the liquid crystal display device 300 can be appropriately changed according to the display mode.

(Embodiment 4) Next, a reflection type liquid crystal display device according to a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 7, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals.

FIG. 7 is a sectional view showing a schematic configuration of a reflection type liquid crystal display device 400 according to the fourth embodiment.

The reflection type liquid crystal display device 400 has an active matrix substrate 401, a counter substrate 402, and a liquid crystal layer 421 interposed therebetween. The configuration of the active matrix substrate 401 is the same as that of the active matrix substrate 101 in the first embodiment. The alignment film 20 is subjected to an alignment process so that the liquid crystal molecules in contact therewith are aligned in the same direction over the entire display screen.

The counter substrate 402 of the first embodiment is identical to the counter substrate 10 of the first embodiment except that another phase difference layer 418 is provided between the phase difference layer 18 and the counter electrode 19.
2 has the same configuration as that of FIG.

The polarizing layers 14 and 15 have polarizing axes 14a and 15a, respectively, which are orthogonal to each other. The polarizing layers 14 and 15 correspond to right-eye pixels and the polarizing layer 15 corresponds to left-eye pixels. Are located. Also in the fourth embodiment,
Pixels 1 arranged in the horizontal direction as in the first embodiment.
Since the rows are alternately used for the right eye and the left eye, the polarizing layers 14 and the polarizing layers 15 are alternately arranged for each row of pixels (that is, in a stripe shape extending in the horizontal direction). The phase difference layer 18 has a region 16 that does not give a phase difference to the incident light and a region 17 that gives a phase difference, and as shown in FIG.
4 so that the region 17 corresponds to the polarizing layer 15,
They are alternately arranged for each pixel row. Further, the slow axis of the region 17 is arranged to be rotated by 45 ° with respect to the polarization axis 15a of the corresponding polarizing layer 15, and gives a phase difference of half a wavelength to the incident light.

On the entire surface of the retardation layer 18, a retardation layer 43 is provided. The slow axis of the phase difference layer 43 is rotated clockwise by 45 with respect to the polarization axis 14a of the polarizing layer 14.
° Rotated and arranged. As the retardation layer 43, an ultraviolet curable liquid crystal material exhibiting a nematic phase at room temperature, which is disclosed in JP-A-8-29618, can be used for producing the retardation layer.

On the retardation layer 18, a transparent electrode 19 as a counter electrode and an alignment film 20 are provided. As described above, the alignment film 20 has been subjected to the alignment process so as to align the liquid crystal molecules in the same direction over the entire display screen. Here, the orientation direction of the orientation film 20 on the side of the counter substrate 402 is arranged to be rotated 45 ° counterclockwise with respect to the polarization axis 14 a of the polarization layer 14. The alignment film of the alignment film 20 on the active matrix substrate 401 side is a liquid crystal layer 42
It is set according to the twist angle of 1.

As the liquid crystal layer 421, an electric field controlled birefringence (ECB) mode can be used. In the present embodiment, as a liquid crystal material having a positive dielectric anisotropy, ZL manufactured by Merck with a refractive index anisotropy Δn1 of 0.094 is used.
A liquid crystal layer 4 using I4792 and having a thickness d1 of 5.5 μm;
21 was formed. Therefore, the retardation Δn1 · d1 of the liquid crystal layer 421 is 517 nm. Correspondingly, the retardation layer 318 (optical anisotropy Δn2, thickness d
The retardation Δn2 · d2 of 2) has a wavelength λ of 550.
When light of nm is incident, (Δn1 · d1−Δn2 ·
d2) /λ=0.5 Specifically, Δn2 · d2 was set to 240 nm. This gives T
When the FT 23 is off, the polarized light reflected by the reflective pixel electrode 25 of the active matrix substrate 401 can pass through the polarizing layers 14 and 15 to display white. When the TFT 23 is on, the reflected pixel The polarized light reflected by the electrode 25 is applied to the polarizing layers 14, 1
5 cannot be passed, so that black display is performed. In addition,
The setting of the value of (Δn1 · d1−Δn2 · d2) / λ is not limited to the above-described numerical value, but may be set to any value as long as it can realize monochrome display.

As described above, also in the reflection type liquid crystal display device 400 of the fourth embodiment, the light corresponding to the image for the right eye and the light corresponding to the image for the left eye are linearly polarized in directions orthogonal to each other. The polarized light is emitted from the counter substrate 402 side. Therefore, if the observer wears polarizing glasses (not shown) made of polarizing plates each having a polarizing axis corresponding to the polarizing axis of the polarizing layers 14 and 15, the observer can observe a three-dimensional image from the counter substrate 402 side. Can be. When the observer does not wear polarized glasses, the observer observes a two-dimensional image.

Further, in the fourth embodiment, since the display is performed in the electric field control birefringence (ECB) mode, it is possible to perform the gradation display. Or instead of ECB mode,
For example, using a nematic liquid crystal twisted 240 ° (for example, SD-4107 manufactured by Chisso Corporation) as a liquid crystal layer,
The display in the twisted nematic mode may be performed. In this case, the alignment direction of the alignment film 20 is also set to correspond to the twist angle of the liquid crystal layer of 240 °. Also, R-
If the liquid crystal display device is of a reflective display mode using a polarizing plate such as an OCB (Reflective-Optically Compensated Bend) mode, the reflective liquid crystal display device 40 of the fourth embodiment will be described.
0 can be used as the display mode.

In the first to fourth embodiments, each pixel group is composed of one row of pixels arranged in the horizontal direction. However, the present invention is not limited to this. Even when one pixel group is composed of one column of pixels arranged in the vertical direction (that is, pixels connected to one source signal line),
The effects described above can be obtained. In this case, the regions of the polarizing layer and the retardation layer and / or the regions of the alignment film are also alternately arranged for each column of pixels. Alternatively, each pixel group may be composed of only one pixel, and the right-eye pixels and the left-eye pixels may be arranged in a checkered pattern (checkered flag shape) in which the pixels for the right and the left are distributed for each pixel in the vertical and horizontal directions. Alternatively, each pixel group may be composed of a plurality of rows of pixels or a plurality of columns of pixels. In this case, the resolution is reduced as compared with the case where each pixel group is constituted by one row of pixels or one column of pixels.

In the first to fourth embodiments, the polarizing layer and the retardation layer are provided inside the liquid crystal display device (on the inner surface of the opposing substrate). May be arranged outside. Also,
The same applies to the light reflection layer, and the first to fourth embodiments described above.
In the above, the pixel electrode of the liquid crystal display device was also used as the light reflection layer, but the pixel electrode may be formed of a transparent electrode and the light reflection layer may be provided outside the liquid crystal display device according to the purpose.

The structure of the TFT element substrate of the present invention is as follows.
The structure of the switching element, the wiring connected to the switching element, the interlayer insulating film formed on the switching element and the wiring, and the display electrode formed thereon is not limited. A structure including a switching element, a wiring connected to the switching element, and a display electrode, which is not provided, may be employed.

As a driving method of the reflection type liquid crystal display device of the present invention, in addition to the active matrix driving method using TFTs described in the above-described first to fourth embodiments, a multi-pixel driving method may be used depending on cost and application. A plex driving method, a multi-line driving method, an active matrix driving method using an MIM element, or the like may be used.

The present invention is not limited to the configuration in which the polarizing layer or the polarizing layer and the retardation layer are provided on one substrate. For example, when the reflective display mode such as the STN mode or the TN mode is used, a polarizing layer is also formed on the first substrate and the second substrate to realize the reflective mode using two polarizing plates. An element configuration in which light transmitted through the two polarizing layers is reflected by the light reflecting layer can be employed.

The order of providing the color filter, the counter electrode, the polarizing layer, and the retardation layer is the same as in the first to fourth embodiments.
The order is not limited to that described above, and may be changed as necessary.

Further, in the first to fourth embodiments, the reflection type liquid crystal display device for displaying a color image has been described. However, the present invention can also be applied to a reflective liquid crystal display device that performs monochrome display.

Further, the reflection type liquid crystal display device of the present invention is not limited to a direct-viewing use such as a portable information terminal, but may be used for a projection use such as a projector and an OHP. However, when the reflective liquid crystal display device of the present invention is used, for example, as a display unit of a portable information terminal, it is very advantageous in that confidentiality of displayed information can be enhanced. This is because information that requires confidentiality cannot be viewed by anyone other than the observer wearing polarized glasses if displayed as a stereoscopic image. The stereoscopic image appears to the observer's eyes who do not wear polarizing glasses as a mere blurred double image.

[0091]

As described above, according to the present invention,
In a liquid crystal display element and a liquid crystal display device having a polarizing layer having a polarizing function, an illumination light source can be eliminated by providing a light reflecting layer and using ambient light.
For this reason, it is possible to provide a liquid crystal display device having a stereoscopic image display function that can achieve low power consumption and can be used for a long time at low cost.

When a switching element is formed on one of the substrates of the liquid crystal display element, the voltage on / off ratio at the time of driving the liquid crystal can be increased, so that the contrast ratio can be improved. The display quality can be improved.

Further, in the reflection type liquid crystal display device of the present invention, a plurality of regions each having at least one pixel and having a polarization selection function are provided. If the regions having directions extend in the horizontal direction and the regions having different polarization directions are arranged alternately in the vertical direction, the reduction in resolution when observing a stereoscopic image can be apparently reduced.

Furthermore, the reflection type liquid crystal display device of the present invention
Since the number of observers can be limited by wearing polarized glasses, it is suitable for displaying an image corresponding to information requiring confidentiality.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a reflective liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of one pixel of an active matrix substrate in the reflection type liquid crystal display device of FIG.

FIG. 3 is a cross-sectional view illustrating a configuration of a reflective liquid crystal display device according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a configuration of a reflective liquid crystal display device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing an optical arrangement in the reflective liquid crystal display device of FIG.

6A and 6B are diagrams for explaining the operation principle of the reflection type liquid crystal display device of FIG. 4, in which FIG. 6A shows a case where no voltage is applied, and FIG. 6B shows a case where a voltage is applied.

FIG. 7 is a cross-sectional view illustrating a configuration of a reflective liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 8 is a conceptual diagram of a conventional liquid crystal display device having a stereoscopic display function using polarized glasses.

9 is a diagram illustrating how crosstalk occurs in the liquid crystal display device of FIG.

FIG. 10 is a cross-sectional view showing a configuration of a modification of the reflective liquid crystal display device according to the second embodiment of the present invention.

[Explanation of symbols]

100, 200, 300, 400 Liquid crystal display device 101, 201, 301, 401 Active matrix substrate 102, 202, 302, 402 Counter substrate 11, 22 Insulating substrate 12 Anti-reflection layer 14, 15 Polarizing layer 18, 218, 418 Phase difference layer 19 Counter electrode 20, 220, 220 ', 320' Alignment film 21, 321 Liquid crystal layer 23 TFT 25 Reflective pixel electrode

Claims (9)

[Claims] 1. A liquid crystal display device having a display screen including a plurality of pixels, wherein the plurality of pixels include a right-eye pixel and a left-eye pixel, and the device includes a first display electrode A second substrate having a second display electrode arranged to face the first display electrode of the first substrate; a first substrate and the second substrate A polarizing layer provided on at least one of the first and second substrates; and a reflective film provided on one of the first substrate and the second substrate. A first region disposed to correspond to the pixel for the left eye, and a second region disposed to correspond to the pixel for the left eye. Is selectively transmitted, and a second polarization different from the first polarization is selectively transmitted in the second region. Crystal display device. 2. The display device according to claim 1, wherein the polarizing layer is provided on the second substrate, and the first display electrode provided on the first substrate is a reflective display electrode that also functions as the reflective film. The liquid crystal display device according to claim 1, wherein 3. The first polarized light transmitted through the first region of the polarizing layer and the second polarized light transmitted through the second region of the polarizing layer are straight lines whose polarization directions are orthogonal to each other. 3. The liquid crystal display device according to claim 1, which is polarized light. 4. The polarization direction of the first polarized light transmitted in the first region and the second polarized light transmitted in the second region of the polarizing layer are rotated in directions opposite to each other. 3. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is circularly polarized light. 5. The liquid crystal display device further includes an optical rotation layer or a retardation layer disposed so as to correspond to at least one of the right-eye pixel and the left-eye pixel.
The liquid crystal display device according to claim 3. 6. The device according to claim 1, wherein the first substrate further includes a switching element connected to the first display electrode, and a wiring connected to the switching element. The liquid crystal display device according to one. 7. The first substrate includes a switching element connected to the first display electrode, a wiring connected to the switching element, an interlayer insulating film formed on the switching element and the wiring. The liquid crystal display device according to claim 1, further comprising: a first display electrode formed on the interlayer insulating film so as to cover the switching element. . 8. The liquid crystal display device further includes a liquid crystal layer sandwiched between the first substrate and the second substrate, wherein the liquid crystal display device has an electric field control birefringence mode, a guest / host mode, and a twisted mode. The display according to any one of claims 1 to 7, wherein the display is performed using any one of the nematic modes.
The liquid crystal display device according to any one of the above. 9. The liquid crystal display device, comprising: a liquid crystal layer sandwiched between the first substrate and the second substrate; and an alignment film formed on the first substrate and the second substrate. The alignment film further includes: liquid crystal molecules included in the liquid crystal layer are aligned in a direction orthogonal to a region corresponding to the right-eye pixel and a region corresponding to the left-eye pixel. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is subjected to an alignment treatment.