JP2008175875A - Dual-view liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dual-view liquid crystal display having enhanced luminance as compared with a conventional one. <P>SOLUTION: In the dual-view liquid crystal display having a liquid crystal display panel having a first substrate, a second substrate and a liquid crystal interposed between the first and the second substrates and a backlight, video lines and scanning lines are formed on the first substrate; a color filter is formed on the second substrate; the backlight is disposed on the second substrate side; a barrier substrate is disposed between the backlight and the second substrate; a polarizing plate is disposed on a surface on the backlight side of the barrier substrate and a parallax barrier is disposed on a surface on the second substrate side of the barrier substrate. A surface on the barrier substrate side of the parallax barrier is a reflection surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a two-screen liquid crystal display device capable of displaying two different images, and more particularly to a two-screen liquid crystal display device with improved brightness.

As a stereoscopic display device, a parallax barrier (parallax barrier) type stereoscopic display device is known. In this parallax barrier type stereoscopic display device, parallax images for the right eye and left eye are alternately arranged, and a parallax barrier is arranged in front of this image, whereby the parallax image for the right eye is displayed by the observer. A three-dimensional stereoscopic image is displayed by presenting a parallax image for the left eye to the left eye of the observer on the right eye.
2. Description of the Related Art A two-screen display device that applies the principle of a parallax barrier type stereoscopic display device is known. (See Patent Document 1 and Non-Patent Document 1 below)
FIG. 15 is a diagram showing the principle of the two-screen display device, in which A is an image for an observer of KA, B is an image for an observer of KB, BARIA is a parallax barrier, and THBA is a parallax. It is a slit-shaped opening of a barrier (BARIA).
In FIG. 15, the distance (T1 in FIG. 15) between the parallax barrier (BARIA) and the image plane on which the images A and B are formed, and the width (THBA) of the opening (THBA) in the parallax barrier (BARIA) By appropriately setting T2), it is possible to display different images for the KA observer and the KB observer, for example, a movie for the KA observer and navigation information for the KB observer. .

As prior art documents related to the invention of the present application, there are the following.
JP 2005-78080 A 3D Display Systems Hardware Research at Sharp Laboratories of Europe http://www.sharp-world.com/corporate/rd/tj2/pdf/6.pdf

In this way, in a conventional two-screen display device using a parallax barrier, light that has passed through the opening of the parallax barrier is transmitted only through the necessary pixels, and is blocked by a portion that is not the opening of the parallax barrier. Two screens for the KA observer and the KB observer are displayed.
Therefore, it can be said that the larger the ratio (aperture ratio) of the width of the opening of the parallax barrier is, the higher the light utilization efficiency is. However, the conventional two-screen display device has a problem that the luminance is lowered.
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a two-screen display device with improved luminance as compared with the prior art.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

In the case of realizing a two-screen liquid crystal display device using a parallax barrier, the ratio of the portion shielded by the parallax barrier is about 70% of the entire screen, which has been a major factor in reducing the luminance. The inventors of the present application have focused on the light that is absorbed and discarded by the parallax barrier, studied the method of minimizing this light as much as possible and maximizing the light that passes through the parallax barrier, and made the present invention. is there.
Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) A two-screen liquid crystal display device having a first substrate, a second substrate, a liquid crystal display panel having a liquid crystal sandwiched between the first substrate and the second substrate, and a backlight. A video line and a scanning line are formed on the first substrate, a color filter is formed on the second substrate, and the backlight is disposed on the second substrate side. A barrier substrate disposed between the second substrate, a polarizing plate disposed on the backlight side surface of the barrier substrate, and a parallax disposed on the second substrate side surface of the barrier substrate; A surface of the parallax barrier on the side of the barrier substrate is a reflecting surface.

(2) A two-screen liquid crystal display device having a first substrate, a second substrate, a liquid crystal display panel having a liquid crystal sandwiched between the first substrate and the second substrate, and a backlight. A video line and a scanning line are formed on the first substrate, a color filter is formed on the second substrate, and the backlight is disposed on the second substrate side. A polarizing plate disposed on the backlight side surface, a barrier substrate disposed between the backlight and the polarizing plate, and a parallax barrier disposed on the polarizing plate side surface of the barrier substrate The surface of the parallax barrier on the barrier substrate side is a reflective surface.
A two-screen liquid crystal display device.
(3) In (2), a viewing angle limiting film is provided between the backlight and the barrier substrate.

(4) A two-screen liquid crystal display device having a first substrate, a second substrate, a liquid crystal display panel having a liquid crystal sandwiched between the first substrate and the second substrate, and a backlight. A video line and a scanning line are formed on the first substrate, a color filter is formed on the second substrate, and the backlight is disposed on the second substrate side. The first retardation film disposed on the backlight side surface, the parallax barrier disposed on the backlight side surface of the first retardation film, and the parallax barrier disposed on the backlight side surface A second retardation film, a polarization reflection layer disposed on the backlight side surface of the second retardation film, and a polarizing plate disposed on the backlight side surface of the polarization reflection layer And the surface of the parallax barrier on the side of the barrier substrate is a reflective surface. You have me.

(5) A two-screen liquid crystal display device having a first substrate, a second substrate, a liquid crystal display panel having a liquid crystal sandwiched between the first substrate and the second substrate, and a backlight. A video line and a scanning line are formed on the first substrate, a color filter is formed on the second substrate, and the backlight is disposed on the second substrate side. A parallax barrier disposed on the backlight side surface, a first retardation film disposed in an opening of the parallax barrier, and a second retardation film disposed on the backlight side surface of the parallax barrier A polarization reflection layer disposed on the backlight side surface of the second retardation film, and a polarizing plate disposed on the backlight side surface of the polarization reflection layer, and the parallax barrier The surface on the barrier substrate side is a reflective surface.
(6) In (1), (4), and (5), a viewing angle limiting film is provided between the backlight and the polarizing plate.
(7) In any one of (1) to (6), the width of the slit-shaped opening of the parallax barrier is not less than 32 μm and not more than 45 μm.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the two-screen display device of the present invention, the luminance can be improved as compared with the conventional case.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted.
[Example 1]
FIG. 1 is a block diagram showing a schematic configuration of a two-screen liquid crystal display device according to Embodiment 1 of the present invention. In the figure, SUB (TFT) is a TFT substrate, SUB (CF) is a CF substrate, POL1 and POL2 are polarizing plates, BAR is a backlight, SUB (GL) is a barrier substrate, BARIA is a parallax barrier, and THBA is a parallax barrier ( BARI) is a slit-shaped opening.
The barrier substrate (SUB (GL) is disposed between the backlight (BAR) and the CF substrate (SUB (CF)). The parallax barrier (BARIA) is the CF substrate (SUB (GL) of the SUB (GL)). The polarizing plate (POL1) is disposed on the surface on the backlight (BAK) side of the barrier substrate (SUB (GL)).
In the present embodiment, the backlight (BAR) side surface of the parallax barrier (BARIA) is a reflective surface. In other words, the backlight (BAR) side surface of the parallax barrier (BARIA) has a high reflectance as much as possible, and a material having a uniform reflectance as much as possible in a sufficiently wide wavelength range for a liquid crystal display panel (for example, Al 3 layers Cr, resin black matrix, etc.) are used. The light reflected by the reflecting surface can contribute to the luminance as much as the light directly emitted from the backlight (BAR).
Further, the surface of the parallax barrier (BARIA) on the CF substrate (SUB (CF)) side is made of a material having as low a reflectance as possible (for example, a three-layer Cr black surface, a resin black matrix diffuse reflection processing surface, an Al blackening processing surface). Etc.). This makes it possible to maintain high color purity.
As described above, the present invention makes the light absorbed by the parallax barrier (BARIA) to the backlight (BAR) side by making the backlight (BAR) side surface of the parallax barrier (BARIA) a reflective surface. It is intended to be reflected and reused.

FIG. 14 is a block diagram showing a schematic configuration of a conventional two-screen liquid crystal display device.
In the conventional two-screen liquid crystal display device shown in FIG. 14, the light that has been absorbed by the parallax barrier (BARIA) is reflected by the backlight (BAR) side surface of the parallax barrier (BARIA) as a reflecting surface. In the case of reflection on the (BAR) side and reuse, it is necessary to dispose the parallax barrier (BARIA) closer to the backlight (BAR) than the CF substrate (SUB (CF)).
For this purpose, in the conventional two-screen liquid crystal display device shown in FIG. 14, a parallax barrier (BARIA) is provided under the TFT substrate (SUB (TFT)). In order to obtain a required viewing angle, it is necessary to thin the TFT substrate (SUB (TFT)) to about 0.1 mm.
However, it is extremely difficult to thin a TFT substrate (SUB (TFT)) to which wiring is provided to about 0.1 mm.
Therefore, in the present invention, as shown in FIG. 1, in the conventional two-screen liquid crystal display device shown in FIG. 14, the TFT substrate (SUB (TFT)) and the CF substrate (SUB ( CF)), the order of overlapping with the parallax barrier (BARIA) is reversed, and the parallax barrier (BARIA), the CF substrate (SUB (CF)), and the TFT substrate (SUB (TFT)) in ascending order from the backlight (BAR) side. ).

FIG. 2 is a cross-sectional view of a principal part showing an example of the CF substrate (SUB (CF)) and the TFT substrate (SUB (TFT)) shown in FIG.
In the example shown in FIG. 2, a pair of substrates (SUB1, SUB2) is provided with a liquid crystal layer (LC) interposed therebetween. In the example shown in FIG. 2, the main surface side of the substrate (SUB2) is the observation side. Thus, the example shown in FIG. 2 has a structure in which the liquid crystal is sandwiched between a pair of substrates.
For example, on the liquid crystal layer side of a substrate (SUB2) such as a glass substrate, a black matrix (BM), a color filter layer (FIR), an overcoat film (OC) are sequentially formed from the substrate (SUB1) toward the liquid crystal layer (LC). ), An alignment film (AL2) is formed.
Here, the substrate (SUB2), the black matrix (BM), the color filter layer (FIR), the overcoat film (OC), and the alignment film (AL2) constitute a CF substrate (SUB (CF)).

Further, for example, on the liquid crystal layer side of the substrate (SUB1) such as a glass substrate, the base insulating film (PAS4), the gate insulating film (GI), and the interlayer insulation are sequentially arranged from the substrate (SUB1) to the liquid crystal layer (LC). A film (PAS3), a video line (DL), an interlayer insulating film (PAS2), a counter electrode (COM), an interlayer insulating film (PAS1), a pixel electrode (PIX), and an alignment film (AL1) are formed. Note that scanning lines (GL) are formed between the gate insulating film (GI) and the interlayer insulating film (PAS3), but are not shown in FIG.
Here, the substrate (SUB1), base insulating film (PAS4), gate insulating film (GI), interlayer insulating film (PAS3), video line (DL), interlayer insulating film (PAS2), counter electrode (COM), interlayer insulating The film (PAS1), the pixel electrode (PIX), and the alignment film (AL1) constitute a TFT substrate (SUB (TFT)).
The counter electrode (COM) is formed in a planar shape, and the pixel electrode (PIX) and the counter electrode (COM) are overlapped with each other via the interlayer insulating film (PAS1), thereby forming a storage capacitor. is doing.
In the example shown in FIG. 2, a liquid crystal display panel is composed of a TFT substrate (SUB (TFT)) provided with pixel electrodes, thin film transistors, and the like, and a CF substrate (SUB (CF)) on which color filters and the like are formed. However, in the liquid crystal display panel shown in FIG. 2, the TFT substrate (SUB (TFT)) and the CF substrate (SUB (CF)) are overlapped with a predetermined gap therebetween, and in the vicinity of the peripheral portion between the two substrates. Both substrates are bonded together by a sealing material provided in a frame shape, and liquid crystal is sealed and sealed inside the sealing material between the substrates from the liquid crystal sealing port provided in a part of the sealing material. A polarizing plate is pasted on the outside.

In the present invention, the surface of the parallax barrier (BARIA) on the backlight (BAR) side is used as a reflective surface, so that the light that is discarded is reused. The light after reflection is used as the backlight. It is desirable that the light attenuation factor be as small as possible before reaching (BAR). In the embodiment shown in FIG. 1, there is a polarizing plate (POL2) in the meantime, which may be a light attenuation factor.
The polarizing plate (POL2) is preferably installed on the side farther than the backlight (BAR) with respect to the position of the parallax barrier (BARIA), but the thickness of the current polarizing plate (POL2) is 0.2 mm. When the polarizing plate (POL2) is installed between the parallax barrier (BARIA) and the CF substrate (SUB (CF)), the thickness cannot satisfy the viewing angle control condition.
Therefore, as shown in FIG. 3, by making this polarizing plate (POL2) a coating-type polarizing layer, the polarizing plate (POL2) is placed between the parallax barrier (BARIA) and the CF substrate (SUB (CF)). It becomes possible to install.

As a method of reusing the light reflected by the parallax barrier (BARIA) without passing through the polarizing plate (POL2), as shown in FIG. 4, a polarizing reflector (PSB), a (1/4) wavelength film, There is a method using (PHO1, PHO2).
That is, as shown in FIG. 4, the polarizing reflector (PSB) is disposed between the parallax barrier (BARIA) and the polarizing plate (POL2), and the parallax barrier (BARIA) is further formed by the polarizing reflecting film (PSB). ) Is provided with a (¼) wavelength film (PHO2), and the slit-like opening (THBA) of the parallax barrier (BARIA) has a (¼) wavelength. A film (PHO1) is disposed.
The operation of the two-screen liquid crystal display device shown in FIG. 4 will be described below with reference to FIG.
The linearly polarized light (R1) whose polarization direction has passed through the polarizing plate (POL2) is the first direction (P direction) passes through the polarization reflector (PSB) and is applied to the (¼) wavelength film (PHO2). Incident.
The linearly polarized light (R1) is converted into circularly polarized light (for example, right-handed circularly polarized light) (R2) by the (1/4) wavelength film (PHO2), and the opening portion of the parallax barrier (BARIA) ( (THBA) is incident on a (1/4) wavelength film (PHO1).
The circularly polarized light (R2) is converted into linearly polarized light (R3) whose polarization direction is the first direction (P direction) by the (1/4) wavelength film (PHO1) and emitted.

In addition, the linearly polarized light (R4) having the polarization direction passing through the polarizing plate (POL2) in the first direction (P direction) passes through the polarization reflector (PSB), and becomes a (1/4) wavelength film (PHO2). ).
The linearly polarized light (R4) is converted into circularly polarized light (for example, rightward circularly polarized light) (R5) by the (1/4) wavelength film (PHO2), and is reflected on the reflection surface of the parallax barrier (BARIA). Reflected. At that time, light (R5) of circularly polarized light (for example, right-handed circularly polarized light) is converted into light (R6) of circularly polarized light (for example, left-handed circularly polarized light) in a different direction.
Light (R6) of circularly polarized light in different directions (for example, left-handed circularly polarized light) is incident on the (¼) wavelength film (PHO2), and the polarization direction is changed by the (¼) wavelength film (PHO2). It is converted into linearly polarized light (R7) in the second direction (S direction).
The linearly polarized light (R7) whose polarization direction is the second direction (S direction) is incident on the polarization reflector (PSB), but since the polarization direction is the second direction, the polarization reflector (PSB). ) Is reflected. At that time, the linearly polarized light (R7) whose polarization direction is the second direction (S direction) is converted into the linearly polarized light (R7) whose polarization direction is the first direction (P direction).
The linearly polarized light (R7) is converted into circularly polarized light (for example, rightward circularly polarized light) (R8) by the (1/4) wavelength film (PHO2), and the (1/4) wavelength film (PHO1). ).
The circularly polarized light (R8) is converted into linearly polarized light (R9) whose polarization direction is the first direction (P direction) by the (1/4) wavelength film (PHO1) and is emitted.
Instead of disposing the (¼) wavelength film (PHO1) in the slit-shaped opening (THBA) of the parallax barrier (BARIA), as shown in FIG. 6, the CF substrate of the parallax barrier (BARIA) ( You may make it arrange | position the (1/4) wavelength film | membrane (PHO1) in the surface at the side of SUB (CF)).

[Example 2]
When a two-screen display effect is obtained using a parallax barrier (BARIA), it is necessary to suppress the generation of side lobes.
For example, as shown in FIG. 7, it is necessary that the right KA observer can see the letter “A” and the left KB observer can see the letter “B”. However, when the viewer of the right KA further increases the viewing angle, the letter “B” that he / she does not want to see is seen as a side lobe. The letter “A” that is not desired may appear as a sidelobe. FIG. 7 is a schematic diagram for explaining a state in which a side lobe is generated in the two-screen liquid crystal display device.
In the present embodiment, the generation of the side lobe is suppressed, and FIG. 8 is a block diagram showing a schematic configuration of the two-screen liquid crystal display device according to the second embodiment of the present invention.
In FIG. 8, PCF is a light control film (viewing angle limiting film of the present invention). In this example, a light control film (PCF) is disposed between the backlight (BAR) and the polarizing plate (POL2). This is different from the two-screen liquid crystal display device of the above-described embodiment.
In this embodiment, the polarizing reflector (PSB) shown in FIGS. 4 and 6 and the (¼) wavelength film (PHO1, PHO2) are provided on the polarizing plate (POL2) on the CF substrate (SUB (CF)) side. ) And the light reflected by the parallax barrier (BARIA) may be reused without passing through the polarizing plate (POL2).

FIG. 9 is a graph showing the transmittance corresponding to the change in the viewing angle of the light control film (PCF).
By applying this light control film (PCF), it is possible to block the light from the pixel causing the side lobe and suppress the side lobe generation.
For example, as shown in FIG. 10, the right KA observer can see the letter “A”, and the left KB observer can see the letter “B” in the right side. Even when the observer of KA further increases the viewing angle, the letter “B” does not appear as a sidelobe, and similarly, the letter “A” does not appear as a sidelobe to the observer of the left KB. can do. In addition, FIG. 10 is a schematic diagram showing a state in which generation of side lobes is suppressed by applying a light control film (PCF) in the state of FIG.
By using a light control film (PCF), the occurrence of side lobes can be suppressed. However, due to the transmittance characteristics of the light control film (PCF) shown in FIG. 9, before and after passing through the light control film (PCF) as shown in FIG. In the vicinity of the viewing angle of 30 °, the luminance is greatly reduced, and thereby the luminance of the two-screen liquid crystal display device is lowered.
FIG. 11 is a graph showing the luminance distribution before transmitting through the light control film (PCF) and the luminance distribution after transmitting through the light control film (PCF). In FIG. 11, (a) is the luminance distribution before passing through the light control film (PCF), and (b) is the luminance distribution after passing through the light control film (PCF).

In the two-screen liquid crystal display device, the following values can be given as the main variables affecting the viewing angle.
(1) Width of slit-like opening (THBA) of parallax barrier (BARIA),
(2) The distance between the parallax barrier (BARIA) and the color filter (FIR), that is, the thickness of the CF substrate (SUB2).
Further, when the input value of the linear function of these two values is determined, in the conventional two-screen liquid crystal display device shown in FIG. 14, the inner crosstalk start angle (θa2) shown in FIG. The outer crosstalk start angle (θb2) can be obtained by the following equation (1).
[Equation 1]
θa2 = sin ⁻¹ (n × sin (tan ⁻¹ ((ac) / 2d)))
θb2 = sin ⁻¹ (n × sin (tan ⁻¹ (((p + c / 2) −a / 2) / d)))
.... (1)
Here, a is the width of the slit-shaped opening (THBA) of the parallax barrier (BARIA), n is the refractive index of the CF substrate (SUB2) and the barrier substrate (SUB (GL)) (here, the refraction of glass) Ratio), d is the thickness of the CF substrate (SUB2), p is the width of one subpixel, and c is the width of the black matrix.

Also in the present embodiment, the inner crosstalk start angle (θa2) and the outer crosstalk start angle (θb2) can be obtained according to the above-described equation (1).
In this example, n is 1.52, d is 91 μm, p is 190 μm, c is 25 μm, and a is a variable. The inner crosstalk start angle (θa2), the outer crosstalk start angle (θb2), and viewing angle dependence. A graph in which the luminance change index is calculated is shown in FIG. Note that the graph of FIG. 13 is calculated under the precondition that the pixel vignetting phenomenon due to the black matrix (BM) does not occur and that sufficient luminance can be obtained in the vicinity of the viewing angle of 30 ° where the luminance is to be obtained most. Has been.
As can be seen from FIG. 13, the inner crosstalk start angle (θa2) is 10 ° or less because the width (a) of the slit-shaped opening (THBA) of the parallax barrier (BARIA) is 45 μm or less and the outer side. The reason why the crosstalk start angle (θb2) is 50 ° or more is that the width (a) of the slit-like opening (THBA) of the parallax barrier (BARIA) is 45 μm or less and the viewing angle dependent luminance change index is 80 or less. It can be seen that the width (a) of the slit-shaped opening (THBA) of the parallax barrier (BARIA) is 32 μm or more.
Therefore, when n is 1.52, d is 91 μm, p is 190 μm, and c is 25 μm, it is understood that a is optimally 32 μm or more and 45 μm or less.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

It is a block diagram which shows schematic structure of the 2 screen liquid crystal display device of Example 1 of this invention. FIG. 2 is a cross-sectional view of a main part illustrating an example of a CF substrate (SUB (CF)) and a TFT substrate (SUB (TFT)) illustrated in FIG. 1. It is a block diagram which shows schematic structure of the modification of the 2 screen liquid crystal display device of Example 1 of this invention. It is a block diagram which shows schematic structure of the modification of the 2 screen liquid crystal display device of Example 1 of this invention. It is a figure for demonstrating operation | movement of the 2 screen liquid crystal display device shown in FIG. It is a block diagram which shows schematic structure of the modification of the 2 screen liquid crystal display device of Example 1 of this invention. It is a schematic diagram for demonstrating the state in which the side lobe generate | occur | produced in the 2 screen liquid crystal display device. It is a block diagram which shows schematic structure of the 2 screen liquid crystal display device of Example 2 of this invention. It is a graph which shows the transmittance | permeability corresponding to the viewing angle change of a light control film (PCF). In the state of FIG. 7, it is a schematic diagram which shows the state which suppressed generation | occurrence | production of the side lobe by applying a light control film (PCF). It is a graph which shows the luminance distribution before permeate | transmitting a light control film (PCF), and the luminance distribution after permeate | transmitting a light control film (PCF). It is a figure for demonstrating the inner side crosstalk start angle ((theta) a2) and the outer side crosstalk start angle ((theta) b2) in the two-screen liquid crystal display device of Example 2 of this invention. In the two-screen liquid crystal display device according to Embodiment 2 of the present invention, the inner crosstalk start angle (θa2) and the outer crosstalk start angle (θ It is a graph which shows (theta) b2) and the calculation result of a viewing angle dependence luminance change index. It is a block diagram which shows schematic structure of the conventional 2 screen liquid crystal display device. It is a figure which shows the principle of a 2 screen display apparatus.

Explanation of symbols

KA, KB observer A image of observer (KA) B image of observer (KB) BARIA parallax barrier THBA slit-like opening of parallax barrier SUB (GL) barrier substrate SUB (TFT) TFT substrate SUB (CF) CF Substrate POL1, POL2 Polarizing plate BAR Backlight LC Liquid crystal layer SUB1, SUB2 Substrate BM Black matrix FIR Color filter layer OC Overcoat film AL1, AL2 Alignment film PAS4 Base insulation film PAS1-PAS3 Interlayer insulation film GI Gate insulation film COM Counter electrode PIX Pixel electrode PSB Polarizing reflector PHO1, PHO2 (1/4) wavelength film PCF Light control film

Claims (7)

A liquid crystal display panel having a first substrate, a second substrate, and a liquid crystal sandwiched between the first substrate and the second substrate;
A two-screen liquid crystal display device having a backlight,
A video line and a scanning line are formed on the first substrate.
A color filter is formed on the second substrate,
The backlight is disposed on the second substrate side,
A barrier substrate disposed between the backlight and the second substrate;
A polarizing plate disposed on a surface of the barrier substrate on the backlight side;
A parallax barrier disposed on a surface of the barrier substrate on the second substrate side,
2. A two-screen liquid crystal display device, wherein a surface of the parallax barrier on the side of the barrier substrate is a reflective surface. A liquid crystal display panel having a first substrate, a second substrate, and a liquid crystal sandwiched between the first substrate and the second substrate;
A two-screen liquid crystal display device having a backlight,
A video line and a scanning line are formed on the first substrate.
A color filter is formed on the second substrate,
The backlight is disposed on the second substrate side,
A polarizing plate disposed on a surface of the second substrate on the backlight side;
A barrier substrate disposed between the backlight and the polarizing plate;
A parallax barrier disposed on the polarizing plate side surface of the barrier substrate,
2. A two-screen liquid crystal display device, wherein a surface of the parallax barrier on the side of the barrier substrate is a reflective surface.   The two-screen liquid crystal display device according to claim 2, further comprising a viewing angle limiting film disposed between the backlight and the barrier substrate. A liquid crystal display panel having a first substrate, a second substrate, and a liquid crystal sandwiched between the first substrate and the second substrate;
A two-screen liquid crystal display device having a backlight,
A video line and a scanning line are formed on the first substrate.
A color filter is formed on the second substrate,
The backlight is disposed on the second substrate side,
A first retardation film disposed on a surface of the second substrate on the backlight side;
A parallax barrier disposed on a surface of the first retardation film on the backlight side;
A second retardation film disposed on the backlight side surface of the parallax barrier;
A polarization reflection layer disposed on a surface of the second retardation film on the backlight side;
A polarizing plate disposed on the surface of the polarized light reflecting layer on the backlight side,
2. A two-screen liquid crystal display device, wherein a surface of the parallax barrier on the side of the barrier substrate is a reflective surface. A liquid crystal display panel having a first substrate, a second substrate, and a liquid crystal sandwiched between the first substrate and the second substrate;
A two-screen liquid crystal display device having a backlight,
A video line and a scanning line are formed on the first substrate.
A color filter is formed on the second substrate,
The backlight is disposed on the second substrate side,
A parallax barrier disposed on the backlight side surface of the second substrate;
A first retardation film disposed in the opening of the parallax barrier;
A second retardation film disposed on the backlight side surface of the parallax barrier;
A polarization reflection layer disposed on a surface of the second retardation film on the backlight side;
A polarizing plate disposed on the surface of the polarized light reflecting layer on the backlight side,
2. A two-screen liquid crystal display device, wherein a surface of the parallax barrier on the side of the barrier substrate is a reflective surface.   6. The two-screen liquid crystal display device according to claim 1, further comprising a viewing angle limiting film disposed between the backlight and the polarizing plate.   7. The two-screen liquid crystal display device according to claim 1, wherein the width of the slit-shaped opening of the parallax barrier is not less than 32 μm and not more than 45 μm.

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