JPH07120777A - Color liquid crystal display device - Google Patents

Abstract

PURPOSE:To obtain a small-sized and high-definition color display. CONSTITUTION:A 1st liquid crystal display panel 2 where a liquid crystal display element 4 provided with a cyan filter 12a and a magenta filter 12b is arranged between a pair of retardation films 5 and 6, and a polarizing plate 36 is arranged on the side of the film 5 opposite to the element 4; and a 2nd liquid crystal display panel 3 where a liquid crystal display element 7 is arranged between a pair of polarizing plates 8 and 9 and which is adjusted to develop yellow(Y) color are laminated and arranged. Cyan(C) color light and magenta(M) color light from the panel 2 are mixed by additive color mixture, and the color- mixed light is mixed with the yellow(Y) color light from the panel 3 by subtractive color mixture. Thus, eight-color display is executed. Even when the high- definition display is realized by increasing the number of picture elements in comparison with the conventional device, the device is restrained from getting larger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display device.

[0002]

2. Description of the Related Art As a method for realizing color display using a liquid crystal display element, there is a method using a color filter, for example. This is arranged corresponding to a pixel provided with a plurality of color filters colored in the three primary colors of light (red, green, and blue). By combining one set of a red filter, a green filter, and a blue filter as one dot, and controlling the alignment state of liquid crystal molecules of a pixel corresponding to each filter to bring the pixel into a light transmitting state or a light blocking state, The display is done. In such a method, color display is realized by additive color mixing.

In addition to the above method, there is a method of utilizing the birefringence of liquid crystal. This uses a color polarizing plate, for example, a stack of at least three STN (super twisted nematic) type liquid crystal display panels that develop colors of cyan, magenta and yellow. In such a method, color display is realized by subtractive color mixing. This example is described in, for example, Japanese Patent Laid-Open No. 3-1502.
2, disclosed in Japanese Patent Laid-Open No. 4-234725.

[0004]

In the method using the color filter described above, one set of three color filters constitutes one dot, and the output line from the liquid crystal driving IC (integrated circuit) is This is three times as large as that in monochrome display, and the number of driving ICs to be mounted is increased. As a result, the wiring becomes complicated, and the area that does not directly contribute to the display increases, resulting in an increase in the size of the liquid crystal display device. In particular, when an attempt is made to increase the definition of the display, the number of pixels increases, so that the above inconvenience becomes more remarkable.
Further, since many driving ICs are mounted, particularly in the case of a low duty driving design, there are restrictions on the dimensions of the driving ICs, which is great for miniaturization of the liquid crystal display device and high definition display. It becomes an obstacle.

A liquid crystal display device using a color filter has a transmittance of about 2.5% to 3.5%. With this transmittance, the minimum luminance of 60 on the display screen required for display is 60.
When trying to obtain cd / m ² , 2400 cd on the light source side
A brightness of at least / m ² is required. In order to satisfy this, a high-luminance light source is necessary, which increases the power consumption of the device.

An object of the present invention is to provide a color liquid crystal display device which is compact and which can provide a high-definition display.

[0007]

The present invention comprises at least two aspects.
A color liquid crystal display characterized in that a first liquid crystal display panel including a liquid crystal display element having a color filter for a color and a second liquid crystal display panel for emitting a color different from the color filters for the two colors are laminated. It is a device.

[0008]

According to the present invention, two color filters are formed on the liquid crystal display element of the first liquid crystal display panel, and the first liquid crystal display panel emits two colors by the color filters. The second liquid crystal display panel emits a color different from the colors of the two color filters. The two liquid crystal display panels are stacked to form a color liquid crystal display device. A color display of a plurality of colors can be realized by combining a total of three colors of two colors of the color filter and one color different from these two colors. 2 that occurs in the first liquid crystal display panel
The color lights are mixed by the additive color mixture, and the mixed light and the light generated in the second liquid crystal display panel are mixed by the subtractive color mixture. For example, 3 for cyan, magenta, and yellow
Eight colors (white, black, red,
Color display of green, blue, cyan, yellow, magenta) is possible.

As described above, in the color liquid crystal display device of the present invention, two liquid crystal display panels are used instead of arranging the three color filters of red, green and blue on one liquid crystal display panel as in the prior art. Are to be laminated. Two color filters are provided on the first liquid crystal display panel, and one set of the color filters constitutes one dot on the display. Therefore, the number of output lines from the liquid crystal driving IC is reduced as compared with the conventional one, and the number of driving ICs to be mounted is also reduced.

Therefore, even if the number of pixels is increased and the display is made finer, the wiring is complicated, and the area not directly contributing to the display is increased and the size of the device is reduced. Therefore, it is possible to obtain a compact and high-definition color display.

Further, when three colors of cyan, magenta and yellow are appropriately selected, the transmittance is higher than that of the conventional one, and a bright display can be obtained. The ideal transmittance of light passing through the conventional red, green, and blue color filters is 30%,
Although they are 55% and 15%, the transmittances of cyan, yellow, and magenta are 70%, 81%, and 15%, respectively, because the transmission wavelength region is longer than the light of the three colors. Therefore, as described above, a bright display can be obtained, the brightness of the light source can be set low, and the power consumption of the device can be reduced.

[0012]

1 is a sectional view showing the structure of a color liquid crystal display device 1 according to an embodiment of the present invention. The color liquid crystal display device 1 is configured by stacking a first liquid crystal display panel 2 and a second liquid crystal display panel 3. First liquid crystal display panel 2
Is configured by disposing an STN type liquid crystal display element 4 between a pair of retardation films 5 and 6 and disposing a polarizing plate 36 on the side of the retardation film 5 opposite to the element 4. The display panel 3 is configured by arranging an STN type liquid crystal display element 7 between a pair of polarizing plates 8 and 9. The liquid crystal display element 4 of the first liquid crystal display panel 2 is provided with a color filter 12 including two color filters 12a and 12b.
Light colored in two colors is obtained. Also, from the second liquid crystal display panel 3, light colored in a color different from the colors of the two color filters 12 is obtained.

Liquid crystal display element 4 of first liquid crystal display panel 2
Includes transparent substrates 10 and 11, a color filter 12, a resin layer 13, transparent electrodes 14 and 15, alignment films 16 and 17, a liquid crystal layer 18, and an adhesive 19. For example, the translucent substrates 10 and 11 made of glass or synthetic resin are adhered with an adhesive 19 with a liquid crystal layer 18 interposed therebetween. The liquid crystal layer 18 is made of, for example, a well-known STN type liquid crystal material, and the adhesive 19 is made of, for example, an ultraviolet curable resin or a thermosetting resin. A plurality of color filters 12 are formed in a matrix on the liquid crystal layer side surface of the substrate 11. The color filter 12 includes, for example, a cyan filter 12a and a magenta filter 12b, and each of the filters 12a and 12b is realized by a synthetic resin colored in cyan (C) color and magenta (M) color, respectively. Such a color filter 12 is formed by, for example, a dispersion method, a dyeing method, a printing method or an electrodeposition method. For example, a phthalocyanine blue / phthalocyanine green pigment is used as the pigment of the cyan filter 12a, and an anthraquinone red / phthalocyanine blue pigment is used as the pigment of the magenta filter 12b. On the substrate 11 on which the color filter 12 is formed,
The resin layer 13 having a light-transmitting property is formed, and the unevenness due to the color filter 12 is flattened.

Transparent electrodes 14 and 15 are formed on the liquid crystal layer side surface of the substrate 10 and on the resin layer 13 of the substrate 11, respectively. The transparent electrodes 14 and 15 are, for example, IT
It is realized by O (Indium Tin Oxide) or SnO ₂ and is formed into a plurality of mutually parallel strips. Also, the electrode 1
4 and the electrode 15 are orthogonal to each other so that the substrate 1
0 and 11 are arranged. At this time, the intersection of the electrodes 14 and 15 corresponds to the color filter 12. Alignment films 16 and 17 are formed on the substrate 10 and the resin layer 13 on which the transparent electrodes 14 and 15 are formed. Alignment films 16 and 17
Is realized by a polyimide resin, for example, and its surface is subjected to an orientation treatment such as a rubbing treatment. Such a liquid crystal display element 4 is arranged between the pair of retardation films 5 and 6. The retardation films 5 and 6 are selected such that when they are arranged so that their uniaxially stretched directions are parallel to each other, the transmitted light is achromatic. For example, as the retardation film 5, NRF-RF440 manufactured by Nitto Denko Corporation is selected,
As the retardation film 6, NRF-RF430 also manufactured by Nitto Denko Corporation is selected. The polarizing plate 36 disposed on the side of the retardation film 5 opposite to the element 4 may be, for example, NP manufactured by Nitto Denko Corporation.
F-1220DU is selected.

On the other hand, the liquid crystal display element 7 of the second liquid crystal display panel 3 in the so-called "yellow mode" display mode.
Includes transparent substrates 20 and 21, transparent electrodes 22 and 23, alignment films 24 and 25, a liquid crystal layer 26, and an adhesive 27. These members are realized by the same members as the liquid crystal display element 4, for example. The translucent substrates 20 and 21 are adhered with an adhesive 27 with a liquid crystal layer 26 interposed therebetween. The transparent electrode 2 is formed on the surface of the substrates 20 and 21 on the liquid crystal layer side.
2 and 23 are formed respectively. The transparent electrodes 22, 23
Like the transparent electrodes 14 and 15, each is formed into a plurality of parallel strips, and the electrodes 22 and 23 are
The substrates 20 and 21 are arranged so that and are orthogonal to each other. Substrates 20 and 21 on which transparent electrodes 22 and 23 are formed
Alignment films 24 and 25 are respectively formed on the top. Such a liquid crystal display element 7 is arranged between the pair of polarizing plates 8 and 9. As the polarizing plates 8 and 9, for example, NPF-G1220DU manufactured by Nitto Denko Corporation is selected.

The transparent electrodes 14, 15, 22, 23 provided in parallel with each other in each of the liquid crystal display panels 2, 3 are formed with the same line width and the same interval, and the electrode 1
The liquid crystal display panels 2 and 3 are laminated so that the intersections of the electrodes 4 and 15 and the intersections of the electrodes 22 and 23 coincide with each other. In the color liquid crystal display device 1, the electrodes 14, 15, 22,
Display is performed using 23 intersections as pixels.

FIG. 2 is an exploded perspective view showing the color liquid crystal display device 1. For example, the light source 28 is arranged on the opposite side of the first liquid crystal display panel 2 from the second liquid crystal display panel 3. The light source 28 is realized by a cold cathode fluorescent lamp having the spectral characteristic shown in FIG. Of the white light 29a emitted from the light source 28, only the light in the specific vibration direction selected by the polarizing plate 36 enters the liquid crystal display element 4 via the retardation film 5. Signal sources 33 and 34 are connected to the liquid crystal display element 4, and drive signals corresponding to cyan (C) color components and magenta (M) color components are applied thereto. The alignment state of the liquid crystal molecules of the liquid crystal layer 18 is changed by applying the drive signal. Incident light is controlled by this state change. Transmitted light 29 transmitted through the liquid crystal display element 4 and transmitted through the retardation film 6
b is cyan (C) color light or magenta (M) color light. These colored lights are mixed by additive color mixing.

Light 29b transmitted through the first liquid crystal display panel 2
Then, only the light in the specific vibration direction of the transmitted light 29b is selected by the polarizing plate 9 and enters the liquid crystal display element 7. A signal source 35 is connected to the liquid crystal display element 7,
A drive signal corresponding to the yellow (Y) color component is applied.
By applying the drive signal, the alignment state of the liquid crystal molecules of the liquid crystal layer 26 is changed similarly to the liquid crystal display element 4.
Incident light is controlled by this state change. The light transmitted through the liquid crystal display element 7 and the polarization plate 8 is yellow (Y).
It becomes colored light. This is because the second liquid crystal display panel 3 is a so-called "yellow mode" liquid crystal display panel. The yellow (Y) color light is subtractively mixed with the light that is additively mixed in the first liquid crystal display panel 2.

FIG. 4 is a diagram showing the positional relationship of the respective constituent members of the color liquid crystal display device 1. If the horizontal direction is the XX direction and the vertical direction is the YY direction with respect to the display screen, the angle a formed by the polarization axis 36a of the polarizing plate 36 and the XX direction is selected to be 175 °, for example. The angle b formed by the uniaxial stretching direction 5a of the retardation film 5 and the XX direction is selected to be 62.5 °, for example. The angle c formed by the uniaxial stretching direction 6a of the retardation film 6 and the XX direction is selected to be 120.5 °, for example. Polarizing plate 9
The angle d formed by the polarization axis 9a of X and the XX direction is, for example, 9
Selected to 5 °. Further, the polarization axis 8a of the polarizing plate 8 and XX
The angle e formed with the direction is selected to be 45 °, for example.

Further, the alignment films 16 and 1 of the liquid crystal display element 4 are arranged.
The angle θ formed by the alignment treatment directions 16a and 17a of 7 is appropriately selected so that the element 4 becomes an STN type liquid crystal display element. The angle φ formed by the alignment treatment directions 24a and 25a of the alignment films 24 and 25 of the liquid crystal display element 7 is selected to be 40 °, for example.

Table 1 below shows the display states of the liquid crystal display panels 2 and 3 in the case of performing 8-color display.
The color liquid crystal display device 1 of this embodiment mixes cyan (C) color light and magenta (M) color light by additive color mixing, and further mixes yellow (Y) color light by subtractive color mixing. The color display of eight colors (white, black, red, green, blue, cyan, yellow, magenta) is performed by appropriately selecting the transmission. Next, the display principle in the case of performing 8-color display will be described.

[0022]

[Table 1]

FIG. 5 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when white (W) color display is performed. During white display, the pixels corresponding to the cyan filter 12a and the magenta filter 12b of the first liquid crystal display panel 2 are turned on (selected), and the second liquid crystal display panel 3
The pixels of are also turned on (selected). Cyan filter 1
By turning on the pixel corresponding to 2a, the spectral characteristic shown in FIG. 5 (1) is obtained, and by turning on the pixel corresponding to the magenta filter 12b, shown in FIG. 5 (2). Spectral characteristics can be obtained. These lights are mixed by additive color mixing. Further, by turning on the pixels of the second liquid crystal display panel 3, the spectral characteristic shown in FIG. 5C is obtained, and the light of the additive color mixture and the subtractive color mixture are mixed to obtain almost white (W ) Color display.

FIG. 6 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when black (BL) color display is performed.
Since the pixels corresponding to the cyan filter 12a and the magenta filter 12b of the liquid crystal display element 4 are in the off (non-selected) state, transmitted light cannot be obtained as shown in FIGS. 6 (1) and 6 (2). Further, in the off state of the liquid crystal display element 7, the spectral characteristic as shown in FIG. 6C is obtained, but since it is shielded by the element 4 as described above, black display is performed.

FIG. 7 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when red (R) color display is performed. During red display, the pixel corresponding to the cyan filter 12a is turned off, the pixel corresponding to the magenta filter 12b is turned on, and the pixel of the second liquid crystal display panel 3 is turned off. By setting each pixel in the above-described state, the spectral characteristics shown in FIGS. 7 (1) to 7 (3) are obtained, mixed by additive color mixing and subtractive color mixing, and shown in FIG. 7 (4). Spectral characteristics can be obtained. This light is colored almost in red (R).

FIG. 8 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when green (G) color display is performed. During green display, the pixel corresponding to the cyan filter 12a is turned on, the pixel corresponding to the magenta filter 12b is turned off, and the pixel of the second liquid crystal display panel 3 is turned off. By setting each pixel in the above-described state, the spectral characteristics shown in FIGS. 8 (1) to 8 (3) can be obtained, and the spectral characteristics are mixed by the additive color mixture and the subtractive color mixture, and are shown in FIG. 8 (4). Spectral characteristics can be obtained. This light is colored almost green (G). In addition,
When performing green display, gradation display is performed on the second liquid crystal display panel 3, and transmitted light colored blue (B) is blocked. As a result, the above-described almost green (G) colored display is obtained. The gradation display on the second liquid crystal display panel 3 is realized by, for example, a frame thinning method or a pulse width modulation method.

FIG. 9 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when blue (B) color display is performed. During blue display, the pixel corresponding to the cyan filter 12a is turned on, the pixel corresponding to the magenta filter 12b is turned off, and the pixel of the second liquid crystal display panel 3 is turned on. By setting each pixel in the above-described state, the spectral characteristics shown in FIGS. 9 (1) to 9 (3) are obtained, and the spectral characteristics are mixed by the additive color mixture and the subtractive color mixture, and are shown in FIG. 9 (4). Spectral characteristics can be obtained. This light is colored almost blue (B). In addition,
When performing blue display, gradation display is performed in the pixel corresponding to the cyan filter 12a, and transmitted light colored green (G) is blocked. As a result, the above-described almost blue (B) colored display is obtained. This gradation display is realized by, for example, the frame thinning method or the pulse width modulation method described above. Cyan filter 1
When gradation display is performed by the pixel corresponding to 2a, although the transmitted light in the cyan wavelength band of 400 nm to 550 nm becomes small, the light from the light source such as a backlight has a green wavelength band of 535 nm to 560 nm. Transmitted light becomes smaller. Therefore, the wavelength band of transmitted light is as shown in FIG.
As shown in (4), it becomes 400 nm to 500 nm, and blue display is obtained.

FIG. 10 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when cyan (C) color display is performed. During cyan display, the pixel corresponding to the cyan filter 12a is turned on, the pixel corresponding to the magenta filter 12b is turned off, and the second liquid crystal display panel 3 is turned on. 10 (1) to 10 (3) by setting each pixel in the above-described state.
The spectral characteristics shown in FIG. 10 are obtained, and the colors are mixed by the additive color mixing and the subtractive color mixing to obtain the spectral characteristics shown in FIG. This light is almost cyan (C) colored.

FIG. 11 is a graph showing the spectral characteristics of each of the liquid crystal display panels 2 and 3 when displaying yellow (Y) colors. During yellow display, the pixel corresponding to the cyan filter 12a is turned on, the pixel corresponding to the magenta filter 12b is turned on, and the second liquid crystal display panel 3 is turned off. 11 (1) to 11 (3) by setting each pixel in the above-described state.
The spectral characteristics shown in FIG. 11 are obtained and mixed by additive color mixing and subtractive color mixing to obtain the spectral characteristics shown in FIG. 11 (4). This light is colored almost yellow (Y).

FIG. 12 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing magenta (M) color display. During magenta color display, the pixels corresponding to the cyan filter 12a are turned off, and the magenta filter 12a
The pixel corresponding to b is turned on, and the second liquid crystal display panel 3 is turned on. 12 (1) to FIG.
The spectral characteristic shown in (3) is obtained, and color mixing is performed by additive color mixing and subtractive color mixing, and the spectral characteristic shown in FIG. 12 (4) is obtained. This light is colored almost magenta (M).

As described above, eight color displays are carried out. In this embodiment, the cyan filter 12a and the magenta filter 12 are provided on the first liquid crystal display panel 2.
Although the example in which b is provided has been described, an example in which a cyan filter and a yellow filter are provided and an example in which a magenta filter and a yellow filter are provided are also within the scope of the present invention. Here, the display color of the second liquid crystal display panel 3 is selected as a magenta color when a cyan filter and a yellow filter are provided, and is selected as a cyan color when a magenta filter and a yellow filter are provided. The yellow filter is made of, for example, an isoindolinone-based yellow pigment, and is formed in the same manner as the cyan filter 12a and the magenta filter 12b described above.

In the present embodiment, the second liquid crystal display panel 3
Although the example in which the liquid crystal display panel of yellow mode is described has been described, it is not necessary to limit to the liquid crystal display panel of the yellow mode, and if the second liquid crystal display panel has a yellow (Y) display color, what can be done? It does not matter even if it has a different structure. For example, by using a color polarizing plate, yellow (Y)
An example of obtaining a color is also within the scope of the present invention. Also,
As described above, a color polarizing plate may be used when the display color of the second liquid crystal display panel 3 is magenta (M) color or cyan (C) color, and any color can be used as long as a desired display color can be obtained. It does not matter even if it has such a configuration.

Further, although the example in which the light from the light source 28 passes through the first liquid crystal display panel 2 and the second liquid crystal display panel 3 in this embodiment has been described, the second liquid crystal display panel 3 and the first liquid crystal display panel are described. Even when passing through the order of 2, it is possible to perform the same color display.

FIG. 13 is a plan view showing the display screens 30 and 31. 13 (1) shows a display screen 30 of the color liquid crystal display device 1 of this embodiment, and FIG. 13 (2) shows a display screen 31 of the conventional color liquid crystal display device. In the color liquid crystal display device 1, color display is performed with two pixels corresponding to one set of the cyan filter 12a and the magenta filter 12b as one dot. Reference numeral P1 in FIG. 13 (1) indicates the pitch of the one dot. On the other hand, in a conventional color liquid crystal display device, three pixels corresponding to one set of the red filter 32a, the green filter 32b and the blue filter 32c form one dot for color display. Reference numeral P2 in FIG. 13 (2) indicates the pitch of one dot in the conventional color liquid crystal display device.

According to this embodiment, the length of the pitch P1 is ⅔ of the length of the conventional pitch P2. Therefore, it is possible to increase the number of dots with respect to the entire display screen area. Further, since one dot consists of two pixels corresponding to a set of a cyan filter and a magenta filter, the output line from the liquid crystal driving IC can be reduced to 2/3 of that of the conventional one, and the driving IC to be mounted can be reduced. Is reduced in number. Therefore, the display can be made finer. In addition, it is possible to reduce the complexity of the wiring and the increase in the area that does not directly contribute to the display and the increase in the size of the device. Therefore, it is possible to obtain a compact and high-definition color display.

Further, although the conventional color liquid crystal display device mixes the light from the color filters 32a to 32c by additive color mixing, the ideal transmittance of the light passing through the filters is the red filter 32a and the green. 30% and 55% for the filter 32b and the blue filter 32c, respectively.
% And 15%. On the other hand, the transmittance of light that passes through the cyan filter 12a, the magenta filter 12b, and the second liquid crystal display panel 3 (yellow) of this embodiment is 7 respectively.
It becomes 0%, 15% and 81%. This is cyan (C)
This is because the color, magenta (M) color, and yellow (Y) color have a longer light transmission wavelength band than the conventional red (R) color, green (G) color, and blue (B) color. Therefore, a bright display can be obtained. As a result, the brightness of the light source 28 can be set low, and the power consumption of the device can be reduced.

In this embodiment, an example in which eight colors are displayed by combining cyan (C) color, magenta (M) color, and yellow (Y) color has been described. The display examples are also within the scope of the present invention.

[0038]

As described above, according to the present invention, color display is performed by a combination of two colors generated in the first liquid crystal display panel and one color generated in the second liquid crystal display panel. Since the first liquid crystal display panel is provided with color filters of two colors, and one combination of the color filters constitutes one dot on the display, the number of pixels is increased as compared with the conventional one, and the display is performed with high definition. Even if the size of the device is increased, the output line wiring from the liquid crystal driving IC becomes complicated, and the area that does not directly contribute to the display increases, and the increase in size of the device is reduced. Therefore, it is possible to obtain a compact and high-definition color display.

[Brief description of drawings]

FIG. 1 is a color liquid crystal display device 1 according to an embodiment of the present invention.
It is a cross-sectional view showing the configuration of.

FIG. 2 is an exploded perspective view showing the color liquid crystal display device 1.

FIG. 3 is a diagram showing a spectral characteristic of a light source 28.

FIG. 4 is a diagram showing a positional relationship between respective constituent members of the color liquid crystal display device 1.

FIG. 5 is a graph showing the spectral characteristics of each liquid crystal display panel 2 and 3 when performing white (W) color display.

FIG. 6 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing black (BL) color display.

FIG. 7 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing red (R) color display.

FIG. 8 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when green (G) color display is performed.

FIG. 9 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when blue (B) color display is performed.

FIG. 10 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing cyan (C) color display.

FIG. 11 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing yellow (Y) color display.

FIG. 12 is a graph showing the spectral characteristics of the liquid crystal display panels 2 and 3 when performing magenta (M) color display.

FIG. 13 is a plan view showing display screens 30 and 31.

[Explanation of symbols]

 1 Color Liquid Crystal Display 2 First Liquid Crystal Display Panel 3 Second Liquid Crystal Display Panel 4,7 Liquid Crystal Display Element 5,6 Retardation Film 8,9,36 Polarizing Plate 12 Color Filter 12a Cyan Filter 12b Magenta Filter

Claims (1)

[Claims] 1. A first liquid crystal display panel including a liquid crystal display element having a color filter of at least two colors, and a second liquid crystal display panel that emits a color different from the color filters of the two colors are stacked. A color liquid crystal display device characterized by.