JP3683637B2 - Liquid crystal display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that performs color and monochrome display.
[0002]
[Prior art]
Among the flat panel displays comparable to the image quality of CRT, TFT (Thin Film Transistor) -LCD is most promising at present. The market is expected to expand further by application to consumer and home appliances such as personal computers, word processors, office automation equipment, and liquid crystal televisions.
[0003]
A normally white mode TN (Twisted Nematic) type LCD that is currently most frequently used will be described with reference to FIG.
In the TN type LCD, two alignment films 101 and 102 whose alignment directions are relatively shifted by 90 ° are attached to upper and lower glass substrates 103 and 104, and a TN liquid crystal 105 of about 5 μm is sandwiched between the alignment films 101 and 102. Yes. The liquid crystal molecules in contact with the alignment films 101 and 102 are aligned along the alignment direction of the alignment films 101 and 102 depending on the properties of the liquid crystal, and the surrounding liquid crystal molecules are aligned along the liquid crystal molecules on the surfaces of the alignment films 101 and 102. As a result, the liquid crystal molecules are aligned between the two alignment films 101 and 102 so as to be twisted by 90 ° as shown in FIG. Further, two polarizing plates 106 and 107 with the deflection axes aligned in the alignment direction are attached to the surface of the two substrates 103 and 104 that does not sandwich the liquid crystal.
[0004]
When light is incident on the liquid crystal panel having such a structure, the light passing through the upper polarizing plate 106 becomes linearly polarized light and enters the liquid crystal 105. As a result, light passes through the 90 ° twisted liquid crystal and is also twisted by 90 °, so that it can pass through the lower polarizing plate 107. At this time, the display is in a “bright” state.
On the other hand, when a voltage is applied between the electrodes (not shown) of the upper and lower glass substrates 103 and 104 as shown in FIG. 11 (b), the liquid crystal molecules stand upright and are twisted. However, the surface of the alignment films 101 and 102 remains along the alignment direction of the alignment films 101 and 102 because the alignment regulating force on the surface is stronger. Since such a liquid crystal is isotropic, the polarization of the linearly polarized light incident on the liquid crystal layer 105 does not rotate. In this case, the display is in the “dark” state. If the voltage is not applied again, the display returns to the “bright” state due to the regulating force of the alignment films 101 and 102.
[0005]
It is already known that the normally white mode and the normally black mode can be selected as shown in FIG. 12 by changing the directions of the two deflecting plates 106 and 107.
In this way, LCDs are not display elements that emit light themselves, such as CRT (Cathode-Ray-Tube) and PDP (Plasma Display Panel), but by acting as a shutter to determine whether or not the liquid crystal transmits incident light. It is a device to display.
[0006]
The twist angle of the liquid crystal molecules changes continuously depending on the balance between the magnitude of the applied voltage and the alignment regulating force of the alignment film. For this reason, as shown in FIG. 3, the transmittance continuously changes depending on the voltage, and a subtle halftone display becomes possible.
Furthermore, color display is possible by attaching a color filter to a panel having a structure as shown in FIG. Three types of color filters, red (R), green (G), and blue (B), which are the three primary colors of light, form red, fringe, and blue picture elements, respectively. These three picture elements form one pixel. . Eight colors can be displayed by combining the brightness of the three picture elements of R, G, and B, and multi-color display can be performed by adding gradation to each picture element.
[0007]
In order to perform full color display, at least R, G, and B filters are generally provided in one pixel, and a TFT is generally formed as a switching element for each R, G, and B picture element.
For example, in the case of a 640 × 480 dot medium-definition VGA panel, the number of TFTs in a full-color liquid crystal display panel is 640 × 3 × 480 = 921600 when one transistor is adopted for each of R, G, and B in one pixel. It is necessary to manufacture a transistor on the display surface. If an arbitrary color can be displayed with one pixel, the number of transistors can be reduced to 307200, which is 1/3 of the number of transistors. In other words, it becomes possible to display three times the definition with the same manufacturing difficulty level.
[0008]
As a method for enabling multicolor display without using a color filter, there is an ECB (Electrically Controlled Birefringence) method. This method utilizes the fact that the peak of the amount of light transmitted through the liquid crystal cell has wavelength dependency due to the birefringence effect of the liquid crystal.
In the ECB type LCD, as shown in FIG. 13, light polarized in the θ direction is divided into light that vibrates in the “n⊥” direction and the “n //” direction when entering the liquid crystal layer.
[0009]
In the birefringent material 112, each light travels at a different phase velocity and is synthesized again. Therefore, the polarization state after passing through the birefringent material 112 is different from that before the birefringent material 112 is transmitted. Since the phase difference between the “n⊥” direction and the “n //” direction changes depending on the wavelength λ, the polarization state after transmission varies depending on the wavelength, that is, the transmittance varies depending on the wavelength, and coloring occurs. For example, when the phase difference of light of wavelength λ is 2 mπ, the original linearly polarized light is obtained, and when the phase difference is π + 2mπ, linearly polarized light rotated by 2θ as shown in FIG.
[0010]
As such a birefringent material 112, for example, if a cell in which nematic liquid crystals having dielectric anisotropy are arranged in a specific direction is sandwiched between paranicol polarizers 110 and 111, light of wavelength λ is turned on at 2 mπ and turned off at π + 2mπ. It becomes. When θ is 45 °, the contrast between the ON state and the OFF state is maximized.
Further, when a change in voltage is observed in the liquid crystal panel, the effective retardation of the liquid crystal 112 changes as shown in FIG. 14, and the color changes because the transmitted wavelength changes.
[0011]
Such an ECB system is generally difficult to display in full color, and is limited to multicolor display of about 8 colors.
Note that the symbol d in FIG. 14 indicates the thickness of the liquid crystal.
[0012]
[Problems to be solved by the invention]
By the way, although the technology of color multicoloring is attracting attention because it is gorgeous and conspicuous, there are not so many applications that must actually be in color display.
Especially for business use, it is overwhelmingly more often to run word software or spreadsheet software than to handle full-color image data.
[0013]
In this case, the number of characters that can be displayed is more important than the number of colors that can be displayed. For businessmen who always carry a personal computer and work, it is preferable that the battery drive time is as long as 1 minute.
That is, the desired color display is different for hobby use and business use.
However, when displaying a monochrome-centered image such as word processing software on a full-color liquid crystal display panel having R, G, and B filters as described above, one transistor drives three transistors simultaneously. Therefore, it is impossible to obtain a character display or line drawing with higher definition in the monochrome mode. For this reason, the current situation is that kanji characters with a large number of strokes tend to be crushed. In addition, since the light transmission characteristics of the color filter are fixed, power consumption is not reduced even if monochrome display is performed.
[0014]
The present invention has been made in view of such problems, and an object of the present invention is to provide a liquid crystal display device that enables full-color display and high-definition monochrome display and can reduce power consumption. To do.
[0015]
[Means for Solving the Problems]
(Means)
As shown in FIGS. 1 to 3 and 5 , the above-described problem has a coloring ECB type liquid crystal panel 3 having a plurality of picture element regions and a plurality of optical shutter mechanisms 5 b, 5 c, 5 x, 5 y. A driving liquid crystal panel 5 disposed opposite to the ECB liquid crystal panel 3 so that each of the plurality of optical shutter mechanisms 5b, 5c, 5x, 5y coincides with any of the plurality of picture element regions ; , chromatic performs control of the ECB type color control and monochrome color display switching of the liquid crystal panel 3, the light shutter mechanism 5b of the driving liquid crystal panels 5, 5c, 5x, and a control circuit 7 for controlling the 5y When the color display is performed, the control circuit 7 adjusts the voltage applied to the ECB type liquid crystal panel 3 to determine the color of the light transmitted through each of the plurality of picture element regions. The voltage applied to the moving liquid crystal panel 5 is adjusted to determine whether or not each of the optical shutter mechanisms 5b, 5c, 5x and 5y transmits light. The applied voltage is adjusted to make the color of light transmitted through each of the plurality of pixel regions the same, and the voltage applied to the driving liquid crystal panel 5 is adjusted to adjust the plurality of optical shutter mechanisms 5b, 5c. , 5x, 5y each determines whether or not light is transmitted, and the ECB liquid crystal panel 3 is overlaid with a compensation panel 8 for retardation correction, and the retardation of the compensation panel 8 is used as the ECB liquid crystal panel. This is solved by a liquid crystal display device characterized in that it has the same size as the retardation 3 and the opposite polarity .
[0016]
In the liquid crystal display device, a liquid crystal panel or a twisted phase film is used as the compensation panel 8.
In the liquid crystal display device, as illustrated in FIG. 10, a plurality of pixel electrodes constituting the plurality of optical shutter mechanisms 5b, 5c, 5x, and 5y are formed on the driving liquid crystal panel 5, and the pixel electrodes are gates. Two pixel electrodes 5h and 5j exist in one region surrounded by the bus 5x and the drain bus 5y.
[0017]
(Work)
Next, the operation of the present invention will be described.
According to the present invention, an ECB liquid crystal panel is dedicated to color display instead of a layered color filter under or above a driving liquid crystal panel having an optical shutter mechanism such as a TFT. Monochrome / color display can be switched by controlling the color of the image.
[0018]
Therefore, in monochrome, it is possible to display at a resolution three times that of color display, and more than three times the panel transmittance compared to the case of using a layered color filter, and the backlight brightness is 1 Low power consumption operation is enabled by dropping to / 3.
Naturally, color display and monochrome display are possible even in the conventional method, but since the transmission characteristics of the color filter are fixed, the display density and the panel transmittance cannot be changed.
[0019]
Further, by using two pixel electrodes in a region surrounded by the gate bus and the drain bus, the resolution at the time of color display can be doubled by 1 to 2 times, and at the time of monochrome, it can be 1 to 6 times.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Accordingly, embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a configuration diagram illustrating a liquid crystal display device according to a first embodiment of the present invention.
In FIG. 1, on the backlight 1, a first deflecting plate 2, a coloring ECB liquid crystal panel 3, a second deflecting plate 4, a driving liquid crystal panel 5, and a third deflecting plate 6 are bonded together in order. Yes. The control circuit 7 turns the backlight 1 on and off, adjusts its brightness, drives the coloring ECB liquid crystal panel 3, or drives the driving liquid crystal panel 5.
[0021]
The coloring ECB liquid crystal panel 3 has first and second transparent electrodes 3a and 3b having a simple matrix structure as shown in FIG. That is, a plurality of striped first transparent electrodes 3a are formed in parallel on the first transparent substrate 3c, and the striped second transparent electrodes 3b extending in a direction orthogonal to the first transparent electrodes 3a. Are formed in parallel on the second transparent substrate 3d, and the intersection of the first transparent electrode 3a and the second transparent electrode 3b becomes a pixel region, and the voltage birefringence in the pixel region is One of red (R), green (G), and blue (B) light is transmitted. An alignment film (not shown) is formed on each of the first transparent electrode 3a and the second transparent electrode 3b. The alignment directions of the alignment films are the first transparent substrate 3c and the second transparent electrode. It is determined by the twist angle of the liquid crystal 3e sealed between the substrates 3d.
[0022]
As shown in FIG. 3, the driving liquid crystal panel 5 serving as a light shutter is an active matrix drive in which a plurality of TFTs 5b are arranged in a matrix on a first transparent substrate 5a. The pixel electrode 5c is connected. Further, a counter transparent electrode 5e facing the pixel electrode 5c is disposed on the second substrate 5d. An alignment film (not shown) is formed on each surface of the pixel electrode 5c and the counter electrode 5e, and the alignment directions of these alignment films are orthogonal to each other. Further, a TN liquid crystal 5f is sealed between the first transparent substrate 5a and the second transparent substrate 5d. Each of the pixel electrodes 5c is arranged so as to coincide with one of the red (R), green (G), and blue (B) picture element regions of the ECB color development panel. One pixel region is constituted by the three pixel electrodes 5c corresponding to the picture elements.
[0023]
In FIG. 3, 5x indicates a gate bus line, and 5y indicates a drain bus line.
The respective deflection axes of the first deflection plate 2 and the second deflection plate 4 are determined by the twist angle of the liquid crystal in the coloring ECB liquid crystal panel 3. Further, the deflection axis of the third deflection plate 6 is parallel Nicol with respect to the deflection axis of the second deflection plate 4 so that the liquid crystal display device is normally white and is advantageous for high-transmission white color development. It has become. In addition, when setting it to normally black, it sets to cross Nicole.
[0024]
A liquid crystal display device having such a configuration was prototyped and its characteristics were evaluated.
The driving liquid crystal panel 5 has a generally known structure that does not have a color filter, and has no special characteristics different from the conventional one.
In addition, the arrangement of the first and second deflecting plates 2 and 4 on the upper and lower sides of the coloring ECB liquid crystal panel 3 is parallel Nicol that is advantageous for coloring a highly transmissive white color. The retardation R ₀ has a homogeneous alignment of 1500 nm, and the twist angle of the liquid crystal 3e is 180 degrees. The reason why the retardation is 1500 nm is that a retardation change of 0 to 1500 nm is required to obtain red, green, blue, and white under parallel Nicols.
[0025]
Next, FIG. 4 shows the voltage change of the transmittance of the color developing ECB liquid crystal panel 3.
In FIG. 4, when the applied voltage between the first and second transparent electrodes 3a and 3b of the ECB liquid crystal panel 3 for color development is increased, the retardation is reduced due to the change in the refractive index of the liquid crystal 3e, and the retardation corresponds to the retardation. Color development is obtained. That is, green is applied when the applied voltage is 0V, red when the applied voltage is 2.4V, yellow when the applied voltage is 2.5V, blue when the applied voltage is 3.2V, and black when the applied voltage is 4.4V. However, in the case of 6V, gray was obtained, but white display was not obtained.
[0026]
As long as color is displayed only with the liquid crystal panel of this configuration, high-transmission black and white display cannot be achieved, so it is possible to use gray instead of white to make gray display, but light transmission in the case of gray The rate is as low as several percent.
Therefore, in order to perform high-transmission monochromatic display, it is necessary to use yellow for monochrome display. In this case, since the light transmittance is 20%, the light transmittance nearly double that in color display can be obtained. Actually, as a result of displaying the color developing ECB liquid crystal panel 3 in combination with the driving liquid crystal panel 5, it was possible to obtain the same color display as the conventional system. Naturally, full-color display is possible.
[0027]
At the time of color display, in the ECB liquid crystal panel 3 for color development, the intersection region of the first transparent electrode 3a and the second transparent electrode 3b selects light of red (R), green (G), or blue (B). Then, a voltage is applied by the control circuit 7 so as to be a kind of filter that transmits. The voltage application is constant for each of the intersecting regions so as not to change in the intersecting region of the first transparent electrode 3a and the second transparent electrode 3b at the time of color display, and the R, G, B colors obtained thereby. The arrangement is made in the form of stripes, mosaics, deltas or squares as in the case of ordinary color filters.
[0028]
In monochrome display, a voltage of about 2.5 V is applied between all of the first transparent electrodes 3b and all of the second transparent electrodes 3d, so that yellow transmission with the maximum transmittance is achieved at all electrode intersections. Generate a filter.
In the liquid crystal display device having the above-described structure, as a matter of course, the gray level or the yellow level can be switched between the color display and the monochrome display without any problem.
[0029]
As described above, in the present embodiment, the ECB liquid crystal panel 3 serves as a color filter and the shutter of the pixel region serves as a general driving liquid crystal panel 5. The same definition. Moreover, the color developing ECB liquid crystal panel 3 only needs to play the role of a color filter, and the display color only needs to be constant. Therefore, the response speed in the liquid crystal tilt direction with respect to the voltage change need not be a problem, and the configuration is simple. Therefore, simple and inexpensive simple matrix driving can be adopted.
[0030]
In color display, three pixel electrodes corresponding to red, green, and blue form one pixel region. In monochrome display, one pixel electrode forms one pixel region, which is three times that in color display. High transmittance can be displayed with high definition.
Moreover, during monochrome display, the light transmittance of the panel is greatly improved, and even if it is simply considered, the amount of light transmitted from one pixel is about three times or more than when a normal color filter is used. Therefore, the luminance of the backlight 1 can be reduced to about 1/3 by the control circuit 7, and low power consumption operation is possible.
(Second Embodiment)
As an improvement of the first embodiment, a method of canceling the retardation of the color developing ECB display panel 3 when no voltage is applied by laminating compensation panels can be considered. The principle of the improvement is shown in FIG.
[0031]
The compensation panel 8 shown in FIG. 5 (b) has a negative retardation and works as -Ro with respect to the retardation Ro of the ECB liquid crystal panel 3 of FIG. 5 (a). There are optically anisotropic films and twisted phase plates formed by stretching.
As a result, the long sleeve direction of the closest liquid crystal molecules of the ECB liquid crystal panel 3 and the compensation panel 8 is orthogonal, and the twist directions are opposite to each other. In this configuration, the retardation Re of the ECB liquid crystal panel 3 when no voltage is applied is compensated to be zero, and the polarization state of the emitted light is the same linear polarization as that of the incident light, so that it is bright when no voltage is applied (V = 0). Achromatic white can be obtained.
[0032]
On the other hand, in the ECB liquid crystal panel 3, the retardation decreases as the voltage application increases, and the color develops according to the effective retardation Re = Ro−R (v). R (v) is the retardation of the ECB liquid crystal panel 3 when a voltage is applied, and changes depending on the magnitude of the applied voltage. However, when the compensation panel 8 is not provided, white display is impossible even when the applied voltage is increased as shown in FIG.
[0033]
By the way, as shown in FIG. 5 (d), when the liquid crystal molecules 3e of the ECB liquid crystal panel 3 are completely raised by applying a high voltage, the transmitted light should be colored green because the retardation of the compensation panel 8 is 1500 nm.
However, in actuality, as shown in FIG. 6, the ECB liquid crystal panel 3 is not zero because the residual retardation Rrem due to anchoring cannot be erased, and does not develop green.
[0034]
In order to eliminate such inconvenience, the problem is solved by increasing the retardation of the compensation panel 8 by Rrem as shown in FIG.
The effective retardation of the ECB liquid crystal panel 3 of this structure is as shown in FIG. 7 when R′o = 1800 nm, and a retardation change of 0 to 1500 nm can be obtained within 5V.
[0035]
Next, the transmittance (T) -applied voltage (V) characteristics are shown in FIG. 8, and the chromaticity change is shown in FIG. As can be seen from FIG. 9, white, blue, red, and green colors can be obtained by using the compensation panel.
In addition, when the compensation panel 8 is used from FIG. 8, the panel transmittance during white display of the ECB liquid crystal panel 3 is significantly higher than 35% when color is developed, and about 10% when color is displayed. I understood that In addition, the applied voltage of the ECB liquid crystal panel 3 in the case of white display is 0 V, and low power consumption during monochrome display is possible.
[0036]
This panel was driven to overlap with the drive panel in the same manner as in the first embodiment. In the color display, the first embodiment is maintained as it is, but in the monochrome mode, a good monochrome display is obtained. In addition, the total transmittance after overlapping was 3 times or more that in color display. A white display is obtained with zero applied voltage.
As the compensation panel 8 described above, a liquid crystal panel having a retardation opposite to that of the ECB panel may be used. However, since the panel configuration has three layers, there is a drawback in that the weight and manufacturing cost increase. As a result of the display, a good image quality that is the same as that obtained when the optically anisotropic film was used was obtained. The retardation was combined with the above conditions.
(Third embodiment)
In the first and second embodiments, the definition can be increased to about three times during monochrome display. However, it is only in the vertical or horizontal direction, and the definition cannot be increased simultaneously in the vertical and horizontal directions. This is because the planar shape of one pixel electrode is a rectangle, and the aspect ratio during monochrome display is different from that during normal color display.
[0037]
As a countermeasure against this, it can be solved to some extent by applying the device as shown in FIG. 10 to the pixel electrode 5c of the driving liquid crystal panel 5.
That is, as shown in FIG. 10, two TFTs 5f and 5g and two pixel electrodes 5h and 5j are provided in one region surrounded by the gate bus 5x and the drain bus 5y shown in FIG. The definition can be 6 times that of the display. If the two pixels in the y direction are arranged in different colors, it becomes possible to increase the fineness in color.
[0038]
Of course, monochrome normal resolution display is also possible in all of the above embodiments. In this case, there is no problem of changing the aspect ratio, but the advantage of high transmission remains.
(Fourth embodiment)
In the above embodiment, the TFT drive system is used for the gradation display panel on the color development panel. However, there is no problem even if another method is used for this.
[0039]
For example, an STN panel may be used. However, the number of gradations was reduced compared to the TFT method, and full color display was not possible, but gradation display of about 256 colors was possible.
[0040]
【The invention's effect】
As described above, according to the present invention, the color display is performed by the ECB type liquid crystal panel, and the pixel light shielding and light transmission control is performed by the normal liquid crystal panel for monochrome display. Maintains the same image quality as before, and can be changed to high definition and low power consumption during monochrome display.
[0041]
Further, by using two pixel electrodes in a region surrounded by the gate bus and the drain bus, the resolution at the time of color display can be doubled by 1 to 2 times, and at the time of monochrome, it can be 1 to 6 times.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a liquid crystal display device according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a schematic configuration of an ECB type liquid crystal panel used in the liquid crystal display device of the first embodiment of the present invention.
FIG. 3 is a perspective view showing a schematic configuration of a driving liquid crystal panel used in the liquid crystal display device according to the first embodiment of the present invention.
FIG. 4 is a characteristic diagram showing an applied voltage and light transmittance of an ECB type liquid crystal panel used in the liquid crystal display device according to the first embodiment of the present invention.
FIG. 5 is a diagram showing light transmission states of an ECB liquid crystal panel and a compensation panel used in a liquid crystal display device according to a second embodiment of the present invention.
FIG. 6 is a characteristic diagram showing a relationship between applied voltage and retardation of an ECB type liquid crystal panel used in a liquid crystal display device according to a second embodiment of the present invention.
FIG. 7 is a characteristic diagram showing a relationship between an applied voltage of an ECB liquid crystal panel used in a liquid crystal display device according to a second embodiment of the present invention and a retardation of an ECB liquid crystal panel whose retardation is compensated by the compensation panel.
FIG. 8 is a characteristic diagram showing a relationship between applied voltage and light transmittance of an ECB type liquid crystal panel obtained by the liquid crystal display device of the second embodiment of the present invention.
FIG. 9 is a characteristic diagram showing changes in chromaticity of an ECB liquid crystal panel used in a liquid crystal display device according to a second embodiment of the present invention.
FIG. 10 is a plan view showing a pixel electrode used in a liquid crystal display device according to a third embodiment of the present invention.
FIG. 11 is an exploded perspective view showing a general TN liquid crystal display device and its operation.
FIG. 12 is a diagram illustrating voltage / light transmission characteristics of a normally white mode and a normally black mode of a general TN liquid crystal display device;
FIG. 13 is an exploded perspective view showing the principle of a general ECB liquid crystal display device.
FIG. 14 is a diagram illustrating a principle of a color change due to a birefringence of a general ECB type liquid crystal display device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Backlight 2 1st deflection plate 3 Color development ECB liquid crystal panel 4 2nd deflection plate 5 Drive liquid crystal panel 6 3rd deflection plate 7 Control circuit 8 Compensation panel

Claims (4)

An ECB liquid crystal panel for color development having a plurality of pixel regions;
A driving liquid crystal panel having a plurality of optical shutter mechanisms, each of the plurality of optical shutter mechanisms being disposed to face the ECB type liquid crystal panel so as to coincide with any one of the plurality of pixel regions ;
A control circuit for controlling the color and monochrome / color display switching of the ECB type liquid crystal panel and controlling the optical shutter mechanism of the driving liquid crystal panel ;
When performing color display, the control circuit determines the color of light transmitted through each of the plurality of picture element regions by adjusting a voltage applied to the ECB type liquid crystal panel, and a voltage applied to the driving liquid crystal panel. To determine whether or not to transmit light by each of the plurality of optical shutter mechanisms,
For monochrome display, the voltage applied to the ECB liquid crystal panel is adjusted to make the color of light transmitted through each of the plurality of pixel regions the same, and the voltage applied to the driving liquid crystal panel is adjusted. Determine whether to transmit light by each of the plurality of optical shutter mechanisms,
A compensation panel for retardation correction is overlaid on the ECB type liquid crystal panel, and the retardation of the compensation panel is the same as the retardation of the ECB type liquid crystal panel and has a reverse polarity. . 2. The liquid crystal display device according to claim 1, wherein the retardation of the ECB liquid crystal panel and the compensation panel is increased by the amount of residual retardation due to anchoring of the ECB liquid crystal panel. The liquid crystal display device according to claim 1, wherein a liquid crystal panel or a twisted phase film is used as the compensation panel. The driving liquid crystal panel is formed with a plurality of pixel electrodes constituting the plurality of optical shutter mechanisms, and the pixel electrode has two pixel electrodes in one region surrounded by a gate bus and a drain bus. The liquid crystal display device according to claim 1.

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