JP2007114295A - Display device and electronic device - Google Patents

Abstract

A display device capable of faithfully reproducing colors existing in the natural world and having excellent image expressive power is provided.
A display device according to the present invention is a display device that performs color display by emitting light of a plurality of different colors, and includes a plurality of subpixels corresponding to the plurality of colors, and each subpixel. A plurality of colored portions formed in corresponding portions, and a color filter formed corresponding to the plurality of sub-pixels, in the plurality of sub-pixels, The plurality of different colors having the same width in the lateral direction are the first color in the range of 0.643 ≦ x, y ≦ 0.333, 0.257 ≦ x, 0. A second color in the range of 606 ≦ y, a third color in the range of x ≦ 0.164, 0.453 ≦ y, and a second color in the range of x ≦ 0.151 and y ≦ 0.056. It consists of 4 colors.
[Selection] Figure 41

Description

  The present invention relates to a display device and an electronic apparatus, and more particularly to a technique for improving display color reproducibility.

  In color image display devices such as liquid crystal displays and organic electroluminescence (hereinafter abbreviated as EL) displays, the additive color mixture of three colors of red (R), green (G), and blue (B) is usually used. Various colors are reproduced. In this case, the reproducible color range (color reproduction range) in the image display is limited to a region expressed as the sum of three color vectors in a three-dimensional color space. In recent years, image display devices have improved the ability to express images with the diversification of applications, and for example, the expression of subtle shades is required. In other words, it is required to expand the color reproduction range. One means for increasing the color reproduction range is to increase the color saturation. However, in order to increase the color saturation, it is necessary to narrow the wavelength region of the color and bring it closer to monochromatic light. Therefore, unless a special light source such as laser light is used, the light utilization efficiency is lowered.

Thus, attempts have been made to expand the color reproduction range by increasing the number of colors used for display. For example, Patent Document 1 below discloses a video display device using four colors. In this video display device, R, G, and B of the four colors are made to coincide with sRGB chromaticity which is one of standard color spaces, and a color reproduction range is obtained by adding cyan (C) color. Is expanding.
JP 2003-228360 A

  However, in the video display device described in Patent Document 1, the chromaticities of R, G, and B of the four colors are matched with the sRGB chromaticity, so that a color that exists in nature, for example, a color called PointerGamut Does not contain enough area. Since the cyan color is added, the color reproduction range is an area surrounded by a quadrangle, which is of course better than sRGB itself. For example, in the Red-Yellow-Green area and the Red-Magenta-Blue area. Does not include PointerGamut.

  FIG. 24 is a u′v ′ chromaticity diagram showing the color reproduction range of the video display device described in Patent Document 1. In this figure, in addition to the color reproduction range of the video display device, PointerGamut which is a database of colors existing in nature and the color reproduction range of the standard color space sRGB are shown. Since the color gamut of sRGB originally does not include PointerGamut, cyan is added. Therefore, PointerGamut is included around the added cyan color. On the other hand, since R, G, and B are sRGB colors, the Red-Yellow-Green region and the Red-Magenta-Blue region do not include PointerGamut. For this reason, there has been a problem that vivid colors cannot be reproduced in these regions, and colors defined in PointerGamut cannot be faithfully reproduced.

  The present invention has been made in order to solve the above-described problems, and in particular, can accurately reproduce colors existing in the natural world and can prevent deterioration of display quality when observed from a predetermined direction. Another object of the present invention is to provide a display device having excellent image expressive power and an electronic device using the display device.

  In order to achieve the above object, the present inventors assume a liquid crystal display device having a color filter and a backlight, or a combination of a color filter and an organic EL device, and exhibit various different spectral characteristics. The color gamut that can be expressed for the combination of the color filter and the backlight is obtained by simulation. As a result, the color gamut surrounded by a rectangle connecting the coordinates of the four colors of red, green, blue, and cyan is a database of natural colors called PointerGamut (MRPointer, The Gamut of Real Surface Colors, COLOR Research and Application , Vol.5 Num.3, pp.145-155, 1980). Here, PointerGamut is a database in which color charts (color samples) and the like are measured, and those with high saturation are collected for each hue. Since highly saturated ones are collected, they are often used for evaluation of color gamut.

That is, the display device of the present invention is a display device that performs color display by emitting light of a plurality of different colors, and corresponds to the plurality of subpixels corresponding to the plurality of colors and the subpixels. A color filter formed in correspondence with the plurality of sub-pixels, wherein in each of the plurality of sub-pixels, a longitudinal direction or a short side of each of the coloring portions. The plurality of different colors having the same width in the direction are the first color in the range of 0.643 ≦ x, y ≦ 0.333, and 0.257 ≦ x, 0.606 ≦ in the xy chromaticity diagram. a second color in the range of y, a third color in the range of x ≦ 0.164, 0.453 ≦ y, and a fourth color in the range of x ≦ 0.151 and y ≦ 0.056. It consists of color.
Although details will be described later as a specific example, according to this configuration, since the color reproduction range in this display device includes PointerGamut, colors existing in the natural world can be faithfully reproduced, and the expressive power of the image can be improved. Can be increased.

The display device of the present invention is a display device that performs color display by emitting light of a plurality of different colors, and corresponds to the plurality of subpixels corresponding to the plurality of colors and the subpixels. A color filter formed in correspondence with the plurality of sub-pixels, wherein in each of the plurality of sub-pixels, a longitudinal direction or a short side of each of the coloring portions. In the u′v ′ chromaticity diagram, the different colors having the same direction width are the first color in the range of 0.450 ≦ u ′ and the second color in the range of 0.569 ≦ v ′. , A third color in the range of u ′ ≦ 0.076, and a fourth color in the range of v ′ ≦ 0.149.
While the above configuration is expressed by an xy chromaticity diagram, this configuration is expressed by a u′v ′ chromaticity diagram. Even in this configuration, since the color reproduction range in this display device includes PointerGamut, colors existing in the natural world can be faithfully reproduced, and the expressiveness of the image can be further enhanced. The upper limit or lower limit of the coordinates in the u'v 'chromaticity diagram of this configuration is obtained from the examples described later, and the upper limit or lower limit value when expressed in the above xy chromaticity diagram system is used as it is. It is not converted to the u'v 'chromaticity diagram system.

  The display device of the present invention is a display device that performs color display by emitting light of a plurality of different colors, and corresponds to the plurality of subpixels corresponding to the plurality of colors and the subpixels. A color filter formed in correspondence with the plurality of sub-pixels, wherein in each of the plurality of sub-pixels, a longitudinal direction or a short side of each of the coloring portions. The plurality of different colors having the same direction width are a first color of a red hue and a second color and a third color of two hues selected from blue to yellow hues. And a fourth color having a blue hue. According to this configuration, since the color reproduction range includes PointerGamut, colors existing in the natural world can be faithfully reproduced, and a liquid crystal display device with higher image expressive power can be realized.

  The display device of the present invention is a display device that performs color display by emitting light of a plurality of different colors, and corresponds to the plurality of subpixels corresponding to the plurality of colors and the subpixels. A color filter formed in correspondence with the plurality of sub-pixels, wherein in each of the plurality of sub-pixels, a longitudinal direction or a short side of each of the coloring portions. The width of the direction is equal, and the color filter has a wavelength peak of light transmitted through the color filter of a first color at 600 nm or more, a second color at 500-590 nm, and 485-535 nm. It has a 3rd color and a 4th color which exists in 400-500 nm, It is characterized by the above-mentioned. According to this configuration, since the color reproduction range includes PointerGamut, colors existing in the natural world can be faithfully reproduced, and a liquid crystal display device with higher image expressive power can be realized.

  In the display device of the present invention, in the plurality of sub-pixels, the width in the longitudinal direction or the short-side direction of each colored portion is formed in a region between adjacent sub-pixels among the plurality of sub-pixels. It is defined by the light shielding film formed.

  In addition, the display device of the present invention includes a backlight that emits light for transmitting the color filter, and the backlight has a blue light wavelength peak at 435 nm to 485 nm and a wavelength of green light. The peak of 550 nm-545 nm and the peak of the wavelength of red light are 610 nm-650 nm.

  In the display device of the present invention, the backlight includes any one of a light emitting diode, a fluorescent tube, and an organic electroluminescence device.

The display device of the present invention includes an organic electroluminescence device that emits light for transmitting the color filter, and the light emitting portion of the organic electroluminescence device has a white light emitting layer that emits white light, The color light of the plurality of colors is obtained by a combination of a color filter and the white light emitting layer. In addition, an organic electroluminescence device that emits light for transmitting the color filter is provided, and a light emitting unit of the organic electroluminescence device includes a red light emitting layer that emits red light, a green light emitting layer that emits green light, and blue A blue light emitting layer that emits light, and a combination of a colored portion corresponding to the first color of the color filter and a red light emitting layer of the light emitting portion, corresponding to the second color of the color filter A combination of a colored portion and a green light emitting layer of the light emitting portion, a combination of a colored portion corresponding to the third color of the color filter and a green light emitting layer of the light emitting portion, and a fourth color of the color filter. A combination of a corresponding colored portion and a blue light emitting layer of the light emitting portion is used to obtain colored light of the plurality of colors.
According to this configuration, since the color reproduction range includes PointerGamut, colors existing in the natural world can be faithfully reproduced, and an organic EL device with higher image expressive power can be realized.

An electronic apparatus of the present invention includes the display device of the present invention or the liquid crystal display device of the present invention.
According to this configuration, an electronic apparatus having a display unit with excellent color reproducibility can be realized by including the display device of the present invention or the liquid crystal display device of the present invention.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, an example of application of the present invention to an active matrix transflective liquid crystal display device using a TFT (Thin-Film Transistor) element as a switching element is shown. FIG. 1 is an exploded schematic perspective view showing the overall configuration of the transflective liquid crystal display device of this embodiment.
As shown in FIG. 1, the liquid crystal display device 3 of the present embodiment includes a color filter substrate 80 and an element substrate (counter substrate) 90 that are disposed to face each other with a liquid crystal layer (not shown) interposed therebetween. And a backlight (not shown) disposed on the opposite side to the viewing side of the liquid crystal panel.

  The element substrate 90 is schematically configured by forming a TFT element 94, a pixel electrode 95, and the like on the surface of the substrate body 91 on the liquid crystal layer side, and forming an alignment film (not shown) on the liquid crystal layer side. More specifically, in the element substrate 90, a large number of data lines 92 and a large number of scanning lines 93 are provided on the surface of the substrate body 91 so as to cross each other. A TFT element 94 is formed in the vicinity of the intersection of each data line 92 and each scanning line 93, and a pixel electrode 95 is connected to each data line 92 via each TFT element 94. Looking at the entire surface of the element substrate 90 on the liquid crystal layer side, a large number of pixel electrodes 95 are arranged in a matrix, and the region where each pixel electrode 95 is formed in the liquid crystal display device 3 is an individual subpixel. . On the other hand, the color filter substrate 80 includes a reflective layer 12, a color filter 13 having colored portions 13R, 13G, 13B, and 13C on the surface of the substrate body 11 on the liquid crystal layer side, a light shielding layer 15, and an overcoat layer (not shown). ), A common electrode 81, and an alignment film (not shown). The reflection layer 12 is provided corresponding to a light reflection region provided in at least one sub-pixel. In the subpixel, a light transmission region is provided in addition to the light reflection region, and the reflection layer 12 is not formed in the light transmission region.

  In FIG. 1, as an example of the first to fourth colors, the color filter 13 has four colored portions, that is, a red colored portion 13R, a green colored portion 13G, a blue colored portion 13B, and a cyan colored portion 13C. The four sub-pixels constitute one pixel. That is, color reproduction of color display is performed by additive color mixing of four color lights composed of first to fourth colors. Therefore, the liquid crystal display device according to the present embodiment has a wider color reproduction range than that in which color display is performed with three colors of R, G, and B.

  FIG. 2 is an xy chromaticity diagram showing the color gamut of the liquid crystal display device of this embodiment. In FIG. 1, the first to fourth colors have been described as red (R), green (G), cyan (C), and blue (B). In each table, the first to fourth colors are not limited to red (R), green (G), cyan (C), and blue (B), but include other colors. The xy coordinate values that each color can take are in a range surrounded by a broken-line rectangle in FIG. That is, as shown in [Table 1] below, the coordinates of the first color are 0.643 ≦ x ≦ 0.690, 0.299 ≦ y ≦ 0.333, and the coordinates of the second color are 0.257. ≦ x ≦ 0.357, 0.606 ≦ y ≦ 0.653, the coordinates of the third color are 0.098 ≦ x ≦ 0.164, 0.453 ≦ y ≦ 0.494, the coordinates of the fourth color Are in the chromaticity range of 0.134 ≦ x ≦ 0.151 and 0.034 ≦ y ≦ 0.056.

  Similarly, FIG. 3 shows the color gamut of the liquid crystal display device of this embodiment in a u′v ′ chromaticity diagram. The u′v ′ coordinate values that each color can take are in a range surrounded by a broken-line quadrangle in FIG. That is, as shown in [Table 2] below, the coordinates of the first color are 0.450 ≦ u ′ ≦ 0.530, 0.517 ≦ v ′ ≦ 0.525, and the coordinates of the second color are 0. 100 ≦ u ′ ≦ 0.150, 0.569 ≦ v ′ ≦ 0.574, the coordinates of the third color are 0.046 ≦ u ′ ≦ 0.076, 0.499 ≦ v ′ ≦ 0.517, The coordinates of the fourth color are in the chromaticity range of 0.158 ≦ u ′ ≦ 0.194 and 0.099 ≦ v ′ ≦ 0.149.

  2 and 3, the color reproduction range that can be expressed by the coordinates of the three colors of sRGB is indicated by a dotted triangle. On the other hand, the coordinates of the three colors of the first color, the second color, and the fourth color in the liquid crystal display device of the present embodiment are located on the outer side of the chromaticity diagram than the coordinates of the three colors of sRGB. In addition, the color gamut that can be expressed by the addition of the third color is an area surrounded by a solid quadrilateral. This quadrangular shape is a quadrangular shape that sets a representative color in the coordinate range that each color can take and connects the representative colors. Therefore, the color gamut surrounded by the rectangle is merely an example, but as shown in FIG. 3, the sRGB triangle does not include a part of PointerGamut, whereas the color gamut of the present embodiment The quadrangle will contain PointerGamut. Therefore, the liquid crystal display device according to the present embodiment can reproduce all of the colors defined by PointerGamut, that is, can faithfully reproduce colors existing in the natural world, and can further enhance image expressive power.

  Looking at the color reproduction range of sRGB in detail, the area that does not contain PointerGamut is large: (1) Red-Yellow-Green area (upper side of inverted triangle in u'v 'chromaticity diagram), (2) Red-Magenta- A blue region (right side of inverted triangle in u'v 'chromaticity diagram) and (3) Green-Cyan-Blue region (left side of inverted triangle in u'v' chromaticity diagram) are divided into three. Here, when viewing the video display device of Patent Document 1, as shown in FIG. 24, the region (3) is included by adding cyan. However, since the colors of R, G, and B other than cyan are set to be the same as that of sRGB, the regions (1) and (2) are not included. On the other hand, as described above, the color reproduction range of the liquid crystal display device of the present embodiment also includes the areas (1) and (2) of PointerGamut, so that it is brighter than the video display device of Patent Document 1. Color can be reproduced.

  However, in the present embodiment, the x coordinate on the xy chromaticity diagram, the upper and lower limits of the y coordinate, the u ′ coordinate on the u′v ′ chromaticity diagram, and the upper and lower limits of the v ′ coordinate are all defined. The coordinate values are in a range surrounded by a broken-line quadrangle in FIGS. However, even if not all of these are specified, in the xy chromaticity diagram, the coordinates of the first color are x ≧ 0.643, the coordinates of the second color are y ≧ 0.606, and the coordinates of the third color are x If .ltoreq.0.164 and the coordinates of the fourth color satisfy y.ltoreq.0.056, PointerGamut is included, and the above effect can be obtained. Similarly, in the u′v ′ chromaticity diagram, the coordinates of the first color are u ′ ≧ 0.450, the coordinates of the second color are v ′ ≧ 0.569, and the coordinates of the third color are u ′ ≦≦. If 0.076 and the coordinates of the fourth color satisfy v ′ ≦ 0.149, PointerGamut is included, and the above effect is obtained.

Note that PointerGamut is shown only in FIG. 3 of the u′v ′ chromaticity diagram and not shown in FIG. 2 of the xy chromaticity diagram. The reason is that the xy chromaticity diagram is known to have a distance on the diagram that does not coincide with the difference due to human perception, and is not suitable for evaluating the color inclusion relationship. On the other hand, the u′v ′ chromaticity diagram is defined in order to improve the non-uniformity of the chromaticity diagram, and is suitable for evaluating the color inclusion relationship. For this reason, PointerGamut is shown only on the u'v 'chromaticity diagram. The original data in the paper describing PointerGamut is given saturation according to lightness for each hue, but in FIG. 3, the maximum saturation is plotted for each hue regardless of lightness. Further, the u ′ coordinate and the v ′ coordinate can be obtained from the x coordinate and the y coordinate based on the following equations (1) and (2).
u ′ = 4x / (− 2x + 12y + 3) (1)
v ′ = 9y / (− 2x + 12y + 3) (2)

  In FIG. 2 and FIG. 3, the reason why the xy chromaticity or u′v ′ chromaticity is specified by defining the range for each color of R, G, B, and C is that the color filter and backlight constituting the liquid crystal display device. This is because there is a certain degree of freedom in the xy chromaticity or u'v 'chromaticity of each color due to the spectral characteristics. Therefore, in the following, specific examples of various color filters and backlights will be given as examples, and the xy chromaticity and u′v ′ chromaticity when using the combination of the color filters and the backlight will be shown. The above ranges (lower limit, upper limit) are values based on the following five examples.

[Example 1]
FIG. 4 to FIG. 7 show the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when using the color filter, the backlight, and these. 4 shows the spectral characteristics of the color filter, FIG. 5 shows the spectral characteristics of the backlight, FIG. 6 shows the xy chromaticity diagram, and FIG. 7 shows the u′v ′ chromaticity diagram. 6 and 7, the sRGB color reproduction range is also shown for comparison. Further, in order to confirm the color inclusion relationship, FIG. 7 also shows PointerGamut. As is well known, the liquid crystal display device is composed of many members other than the color filter and the backlight, but the color filter and the backlight greatly contribute to the color reproducibility. For this reason, only the spectral characteristics of the color filter and the backlight are shown here.

  In Example 1, as a color filter, as shown in FIG. 4, the peak wavelength for the fourth color light is 400 to 490 nm, the peak wavelength for the third color light is 490 to 520 nm, and the second color light is used. A peak wavelength of 520 to 570 nm and a peak wavelength of 600 nm or more for the first color light were used. Moreover, as a backlight, what was equipped with LED of 3 colors was used, and as shown in FIG. 5, the peak wavelength of each LED used what is 460 nm of blue, 540 nm of green, and 640 nm of red.

  As a result of the simulation using the color filter and the backlight, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 6 and 7 (specific coordinate values are [Refer to [Table 3] and [Table 4].) A color gamut indicated by a quadrilateral connecting the colors was obtained. In particular, as shown in FIG. 7, the color gamut of Example 1 includes almost all PointerGamut. Therefore, more vivid colors can be reproduced as compared with sRGB and the video display device disclosed in Patent Document 1.

[Example 2]
FIGS. 8 to 11 show the color filter, the backlight, and the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when these are used. 8 shows the spectral characteristics of the color filter, FIG. 9 shows the spectral characteristics of the backlight, FIG. 10 shows the xy chromaticity diagram, and FIG. 11 shows the u′v ′ chromaticity diagram. 10 and 11, the sRGB color reproduction range is also shown for comparison. Furthermore, PointerGamut is also shown in FIG. 11 in order to confirm the color inclusion relationship.

  In Example 2, the same color filter as in Example 1 was used as shown in FIG. On the other hand, unlike Example 1, the backlight used was equipped with a fluorescent tube having peak colors of three colors. As shown in FIG. 9, the peak wavelengths used were blue at 435 nm, green at 545 nm, and red at 630 nm.

  As a result of the simulation using the color filter and the backlight, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 10 and 11 (specific coordinate values are [Refer to [Table 5] and [Table 6].) A color gamut indicated by a quadrilateral connecting the colors was obtained. In particular, as shown in FIG. 11, the color gamut of Example 2 includes almost all PointerGamut. Therefore, even when a three-color wavelength fluorescent tube type backlight is used, a more vivid color can be reproduced as compared with sRGB and the video display device disclosed in Patent Document 1.

[Example 3]
12 to 15 show the color filter, the backlight, and the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when these are used. 12 shows the spectral characteristics of the color filter, FIG. 13 shows the spectral characteristics of the backlight, FIG. 14 shows the xy chromaticity diagram, and FIG. 15 shows the u′v ′ chromaticity diagram. 14 and 15 also show the sRGB color reproduction range for comparison. Further, FIG. 15 also shows PointerGamut in order to confirm the color inclusion relationship.

  In Example 3, the same color filter as in Example 1 was used as shown in FIG. On the other hand, as in Example 1, a backlight including three colors of LEDs was used, but a backlight having a peak wavelength different from that in Example 1 was used. That is, as shown in FIG. 13, the peak wavelength of each LED used was 465 nm for blue, 520 nm for green, and 635 nm for red (in Example 1, 460 nm, 540 nm, and 640 nm).

  As a result of the simulation with the setting using the above color filter and backlight, as shown in FIGS. 14 and 15, the xy chromaticity and u′v ′ chromaticity of each color are obtained (specific coordinate values are: [Refer to [Table 7] and [Table 8].) A color reproduction range indicated by a quadrangular shape connecting each color was obtained. In particular, as shown in FIG. 15, the color gamut of Example 3 is (1) Red-Yellow-Green region (upper side of inverted triangle in u′v ′ chromaticity diagram) compared to Examples 1 and 2. Is slightly narrower. However, compared with the color reproduction gamut of sRGB, (2) Red-Magenta-Blue region (right side of inverted triangle in u'v 'chromaticity diagram), (3) Green-Cyan-Blue region (u'v 'Left side of inverted triangle in chromaticity diagram) contains more PointerGamut. Therefore, even when a three-color LED type backlight having different peak wavelengths is used (a single LED is changed), more vivid colors can be reproduced as compared with sRGB and the video display device of Patent Document 1. .

[Example 4]
FIG. 16 to FIG. 19 show the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when the color filter, the backlight, and these are used. 16 shows the spectral characteristics of the color filter, FIG. 17 shows the spectral characteristics of the backlight, FIG. 18 shows the xy chromaticity diagram, and FIG. 19 shows the u′v ′ chromaticity diagram. 18 and 19 also show the sRGB color reproduction range for comparison. Furthermore, PointerGamut is also shown in FIG. 19 in order to confirm the color inclusion relationship.

  In Example 4, the same color filter as in Example 1 was used as shown in FIG. On the other hand, the backlight used was a three-color wavelength fluorescent tube type as in Example 2, but a backlight having a peak wavelength different from that in Example 2 was used. That is, as shown in FIG. 17, each peak wavelength is the same as that in Example 2 in that blue is 435 nm and green is 545 nm, but red is 610 nm (red in Example 2 is red). 630 nm).

  As a result of the simulation using the color filter and the backlight, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 18 and 19 (specific coordinate values are [Refer to [Table 9] and [Table 10].) A color gamut indicated by a quadrilateral connecting the colors was obtained. In particular, as shown in FIG. 19, the color gamut of Example 4 is (2) Red-Magenta-Blue region (right side of inverted triangle in u'v 'chromaticity diagram) as compared with Examples 1 and 2. Is slightly narrower. Further, when the second color is viewed, it does not include Green of sRGB. These are caused by the spectral characteristics of the color filter and the backlight set in the fourth embodiment. However, from the viewpoint of whether or not PointerGamut is included, (1) Red-Yellow-Green region (upper side of inverted triangle in u'v 'chromaticity diagram), (3) Green-Cyan-Blue region (u Any of the left side portions of the inverted triangle in the “v” chromaticity diagram) includes more PointerGamut than the sRGB color reproduction range. Therefore, even when using a three-color wavelength fluorescent tube type backlight having a different peak wavelength (changing the fluorescent material), the color defined in PointerGamut is different from that of the image display device of sRGB or Patent Document 1. It can be reproduced more faithfully.

[Example 5]
FIG. 20 to FIG. 23 show the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when the color filter, the backlight, and these are used. 20 shows the spectral characteristics of the color filter, FIG. 21 shows the spectral characteristics of the backlight, FIG. 22 shows the xy chromaticity diagram, and FIG. 23 shows the u′v ′ chromaticity diagram. 22 and 23, the sRGB color reproduction range is also shown for comparison. Furthermore, PointerGamut is also shown in FIG. 23 to confirm the color inclusion relationship.

  In Example 5, the same backlight as in Example 4 was used as shown in FIG. On the other hand, a color filter different from those in Examples 1 to 4 was used. That is, as shown in FIG. 20, the characteristics of the fourth color are different from those of Examples 1 to 4, and the peak is shifted to the long wavelength side (about 460 nm) and the transmittance is improved. The characteristic of the color filter is different because the additive color material is different.

  As a result of the simulation using the color filter and the backlight, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 22 and 23 (specific coordinate values are [Refer to [Table 11] and [Table 12]), and a color gamut indicated by a rectangle connecting the colors was obtained. In particular, as shown in FIG. 23, the color gamut of Example 5 is (2) Red-Magenta-Blue region (right side of an inverted triangle in the u'v 'chromaticity diagram) as compared to Examples 1 and 2. Is equivalent to sRGB. Further, when the second color is viewed, it does not include Green of sRGB. These are caused by the spectral characteristics of the color filter and the backlight set in the fifth embodiment. However, from the viewpoint of whether or not PointerGamut is included, (2) Red-Magenta-Blue region is equivalent to sRGB, but (1) Red-Yellow-Green region (u'v 'chromaticity diagram) (3) Green-Cyan-Blue region (left side of inverted triangle in u'v 'chromaticity diagram) contains more PointerGamut than sRGB color gamut. Yes. For these reasons, even when the color filter is changed, the color defined in PointerGamut can be reproduced more faithfully than sRGB or the video display device disclosed in Patent Document 1.

[Example 6]
FIG. 26 to FIG. 29 show the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when the color filter and backlight of Example 6 are used. 26 shows the spectral characteristics of the color filter, FIG. 27 shows the spectral characteristics of the backlight, FIG. 28 shows the xy chromaticity diagram, and FIG. 29 shows the u′v ′ chromaticity diagram. 28 and 29, the sRGB color reproduction range is also shown for comparison. Furthermore, PointerGamut is also shown in FIG. 29 in order to confirm the color inclusion relationship.

  In Example 6, a backlight with wavelength conversion was used. That is, as shown in FIG. 27, by irradiating the phosphor with light having an original peak wavelength of 450 nm, part of the light with a peak wavelength of 450 nm is converted into light with a relatively broad luminance distribution with a peak wavelength of 565 nm. It is a thing. As a result, both have a peak wavelength of 450 nm before conversion and a peak wavelength of 565 nm after conversion. On the other hand, a color filter different from those in Examples 1 to 5 was used. That is, as shown in FIG. 26, the transmittance of the fourth color is higher than that of the other embodiments, and is almost equal to that of the third color. The characteristic of the color filter is different because the additive color material is different.

  As a result of the simulation using the color filter and the backlight, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 28 and 29 (specific coordinate values are [Refer to [Table 13] and [Table 14]), and a color gamut indicated by a rectangle connecting the colors was obtained. In particular, as shown in FIG. 29, the color gamut of Example 6 includes sRGB and further includes PointerGamut except for a small portion of the Red-Magenta-Blue region. For these reasons, even when a backlight with wavelength conversion is used, the color defined by PointerGamut can be reproduced more faithfully than sRGB or the video display device disclosed in Patent Document 1.

In the present embodiment, in the xy chromaticity, the first color may be 0.643 ≦ x, y ≦ 0.333, and preferably 0.643 ≦ x ≦ 0.690, 0. It is sufficient if 299 ≦ y ≦ 0.333. The second color may be 0.257 ≦ x, 0.606 ≦ y, and preferably 0.257 ≦ x ≦ 0.357, 0.606 ≦ y ≦ 0.670. . The third color may be x ≦ 0.164, 0.453 ≦ y, and preferably 0.098 ≦ x ≦ 0.164, 0.453 ≦ y ≦ 0.759. . The fourth color may be x ≦ 0.151 and y ≦ 0.056, and preferably 0.134 ≦ x ≦ 0.151 and 0.034 ≦ y ≦ 0.056. .
Furthermore, in u′v ′ chromaticity, the first color may be 0.450 ≦ u ′, preferably 0.450 ≦ u ′ ≦ 0.530, 0.517 ≦ v ′ ≦ 0. It may be 525. The second color may be 0.569 ≦ v ′, and preferably 0.100 ≦ u ′ ≦ 0.150 and 0.569 ≦ v ′ ≦ 0.577. The third color may be u ′ ≦ 0.076, and preferably 0.040 ≦ u ′ ≦ 0.076 and 0.499 ≦ v ′ ≦ 0.576. The fourth color may be v ′ ≦ 0.149, and preferably 0.158 ≦ u ′ ≦ 0.194 and 0.099 ≦ v ′ ≦ 0.149.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
In this embodiment, an example of application of the present invention to an active matrix bottom emission type organic EL device using a TFT element as a switching element will be described.
FIG. 30 is a cross-sectional view showing the overall configuration of the organic EL device of this embodiment.
As shown in FIG. 30, the organic EL device 20 of the present embodiment is generally configured by a glass substrate 21, a TFT element 22 and a light emitting unit 23 formed on the glass substrate 21, and a sealing substrate 24. . Specifically, the TFT element 22 is formed on the glass substrate 21, and the TFT element 22 is covered with an insulating film 25. A first partition layer 26 made of an inorganic insulating film and a second partition layer 27 made of an organic insulating film are laminated between the sub-pixels on the insulating film 25, and these first and second layers are stacked on the glass substrate 21. A plurality of sub-pixels constituting a color pixel are partitioned in a matrix form by the partition layers 26 and 27. These first and second partition layers 26 and 27 are suitable for forming an organic functional layer such as a hole injection / transport layer and a white light emitting layer, which will be described later, by a droplet discharge method such as an inkjet method.

  Within each sub-pixel, a colored portion of a different color that forms a color filter is formed. In FIG. 30, as an example of the first to fourth colors, the color filter 28 includes four colored portions, that is, a red colored portion 28R, a green colored portion 28G, a blue colored portion 28B, and a cyan colored portion 28C. Each pixel has one, and four subpixels of R, G, B, and C constitute one pixel. That is, color display color reproduction is performed by an additive color mixture of four color lights including red (R), green (G), blue (B), and cyan (C). Therefore, the organic EL device 20 according to the present embodiment has a wider color reproduction range than that which performs color display with three colors of R, G, and B. A pixel electrode 29 (anode) electrically connected to the TFT element 22 by a contact hole that penetrates the insulating film 25 and the color filter 28 is formed.

  On each pixel electrode 29, a hole injection / transport layer 30 made of an organic material and a white light emitting layer 31 are sequentially laminated, and a common electrode 32 made of a metal film such as aluminum is formed on the white light emitting layer 31. Cathode) is formed. In the present embodiment, the white light emitting layers 31 of all the subpixels are formed of the same organic material that can emit white light. As a material for forming the hole injection / transport layer 30, polymer materials such as polythiophene, polystyrene sulfonic acid, polypyrrole, polyaniline, and derivatives thereof can be suitably used. As a forming material (light emitting material) of the white light emitting layer 31, a polymer light emitting material or a low molecular weight organic light emitting dye, that is, a light emitting material such as various fluorescent materials or phosphorescent materials can be used. Among the conjugated polymers that serve as a light-emitting substance, those containing an arylene vinylene or polyfluorene structure are particularly preferable. When the white light emitting layer 31 is formed by an ink jet method (droplet discharge method), it is desirable to use a polymer material as the light emitting material. For example, polydioctylfluorene (PFO) and MEH-PPV are mixed at a ratio of 9: 1. What was done can be used suitably. In the present embodiment, the light emitting section 23 has the two-layer structure, but an electron transport layer, an electron injection layer, or the like may be provided on the light emitting layer as necessary.

  The surface of the glass substrate 21 configured as described above is covered with the sealing layer 33 and further sealed with the sealing substrate 24. A material having a gas barrier property is preferable as the material of the sealing layer 33. For example, silicon oxide, silicon nitride, or silicon oxynitride can be suitably used. Glass or the like can be used for the sealing substrate 24.

  Of course, it is possible to form separate organic materials as the white light emitting layer 31 in the present embodiment, and further, the thickness of the light emitting layer is changed for each sub-pixel and the pixel electrode 29 (anode) is a semi-transmissive structure. In addition, a configuration may be adopted in which light emission characteristics are controlled by an optical path length difference using an optical resonator structure between the pixel electrode 29 (anode) and the common electrode 32 (cathode). Although not shown in the present embodiment, it is of course possible to realize a similar configuration using a color filter and a light emitting layer in an active matrix top emission type organic EL device.

[Example 7]
FIG. 31 to FIG. 34 show the color filter of Example 7, the spectral characteristics of the organic EL device, and the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when these are used. In FIG. 30, the first to fourth colors are described as red (R), green (G), cyan (C), and blue (B). However, in the following figures and tables, The first to fourth colors are not limited to red (R), green (G), cyan (C), and blue (B), but include other colors. 31 shows the spectral characteristics of the color filter, FIG. 32 shows the spectral characteristics of the organic EL device (white light emitting layer), FIG. 33 shows the xy chromaticity diagram, and FIG. 34 shows the u′v ′ chromaticity diagram. 33 and 34 also show the sRGB color reproduction range for comparison. Further, in order to confirm the color inclusion relationship, FIG. 34 also shows PointerGamut.

  As a result of the simulation with the setting using the color filter and the white light emitting layer, as shown in FIGS. 33 and 34, the xy chromaticity and u′v ′ chromaticity of each color are obtained (specific coordinate values). [Refer to [Table 15] and [Table 16]), a color gamut indicated by a quadrilateral connecting the colors was obtained. In particular, as shown in FIG. 34, the color gamut of the seventh embodiment is sufficiently wider than those of the first to sixth embodiments using liquid crystal, including sRGB and further including PointerGamut. For these reasons, even when an organic EL device is used, colors defined in PointerGamut can be reproduced more faithfully than sRGB or the video display device disclosed in Patent Document 1.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to FIG.
Similarly to the second embodiment, this embodiment is an application example of the present invention to an active matrix bottom emission type organic EL device using a TFT element as a switching element.
FIG. 35 is a cross-sectional view showing the overall configuration of the organic EL device of this embodiment. The basic configuration of the organic EL device of this embodiment is the same as that of the second embodiment, but instead of the configuration in which a white light emitting layer is provided for all subpixels, light emission that emits light of a different color for each subpixel. Only the point which provided the layer differs from 2nd Embodiment. Therefore, in FIG. 35, the same code | symbol is attached | subjected to the same component as FIG. 30, and detailed description is abbreviate | omitted.

  In the case of the organic EL device 40 of this embodiment, as shown in FIG. 35, a light emitting layer that emits light of a different color is formed for each sub-pixel. In FIG. 35, as examples of the first to fourth colors, a red light emitting layer 31R, a green light emitting layer 31G, a blue light emitting layer 31B, and a green light emitting layer 31G are formed. For example, four colored portions of a red light emitting layer 31R, a green light emitting layer 31G, a blue light emitting layer 31B, and a green light emitting layer 31G are formed from the left subpixel to the right subpixel in FIG. The second and fourth green light emitting layers 31G may be the same or different in material and film thickness. For example, as the material of each light emitting layer, cyanopyriphenylene vinylene can be used for the red light emitting layer 31R, polyphenylene vinylene or the like can be used for the green light emitting layer 31G and the blue light emitting layer 31B. And in each sub pixel, the colored part of the different color which comprises a color filter is formed. The color filter side is the same as in the second embodiment. That is, the four colored portions of the red colored portion 28R, the green colored portion 28G, the blue colored portion 28B, and the cyan colored portion 28C are arranged for each subpixel from the left subpixel to the right subpixel in FIG. The four subpixels R, G, B, and C constitute one pixel.

  That is, from the left side of FIG. 35, the red colored portion 28R of the color filter 28 is formed on the red light emitting layer 31R of the light emitting portion 23, the green colored portion 28G is formed on the green light emitting layer 31G, and the blue colored portion 28B is formed on the blue light emitting layer 31B. Each of the cyan colored portions 28C corresponds to the light emitting layer 31G. As a result, the color is obtained by additive color mixing of four color lights including red (R), green (G), blue (B), and cyan (C). The display color is reproduced. Therefore, the organic EL device 40 of the present embodiment has a wider color reproduction range than that for performing color display with three colors of R, G, and B.

[Example 8]
36 to 39 show the color filter of Example 8, the spectral characteristics of the organic EL device, and the xy chromaticity and u′v ′ chromaticity of each of the first to fourth colors when these are used. In FIG. 35, the first to fourth colors are described as red (R), green (G), cyan (C), and blue (B). However, in the following figures and tables, The first to fourth colors are not limited to red (R), green (G), cyan (C), and blue (B), but include other colors. 36 shows a spectral characteristic of the color filter, FIG. 37 shows a spectral characteristic of the organic EL device (each color light emitting layer), FIG. 38 shows an xy chromaticity diagram, and FIG. 39 shows a u′v ′ chromaticity diagram. 38 and 39 also show the sRGB color reproduction range for comparison. Furthermore, PointerGamut is also shown in FIG. 39 in order to confirm the color inclusion relationship.

  In Example 8, as shown in FIG. 37, the peak wavelength of light emitted from the blue light emitting layer is 455 nm, the peak wavelength of light emitted from the green light emitting layer is 530 nm, and the peak of light emitted from the red light emitting layer. The one having a wavelength of 650 nm was used. When viewed as a whole unit pixel composed of four sub-pixels, a luminance distribution as shown by a broken line is shown. Regarding the entire luminance distribution, the peak luminance of the green light is larger than that of the other colors because, as described in the above embodiment, one unit pixel has two green light emitting layers. Because. On the other hand, the same color filter as in Example 7 was used.

  As a result of the simulation with the setting using the color filter and each light emitting layer, the xy chromaticity and u′v ′ chromaticity of each color are obtained as shown in FIGS. 38 and 39 (specific coordinate values). [Refer to [Table 17] and [Table 18]), a color gamut indicated by a quadrilateral connecting the colors was obtained. In particular, as shown in FIG. 39, the color gamut of the eighth embodiment is sufficiently wider than those of the first to sixth embodiments using the liquid crystal and includes sRGB and also includes PointerGamut. For these reasons, even when an organic EL device is used, colors defined in PointerGamut can be reproduced more faithfully than sRGB or the video display device disclosed in Patent Document 1.

[Fourth Embodiment]
Next, with reference to FIGS. 40 and 41, a fourth embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this embodiment, it is possible to combine suitably with each above-mentioned embodiment and each Example in the range which does not deviate from the meaning of this invention.

First, the configuration and the like of the liquid crystal display device 100 will be described. 40 and 41, as examples of the first to fourth colors, the color filter has a transmissive type having four colors of R (red), B (blue), G (green), and C (cyan). The liquid crystal display device will be described as an example, but the first to fourth colors are not limited to R (red), B (blue), G (green), and C (cyan), but are other colors. May be.
FIG. 40 is a cross-sectional view schematically showing a schematic configuration of the liquid crystal display device 100 according to the present embodiment. In FIG. 40, the color filter substrate 192 is disposed on the observation side, and the element substrate 191 is disposed on the opposite side of the color filter substrate 192 with the liquid crystal layer 4 interposed therebetween. In FIG. 40, the region corresponding to each color of R, G, B, and C shows one subpixel SG, and the pixel arrangement of 1 row × 4 columns corresponding to R, G, B, and C is 1 One pixel AG is shown.

  In the liquid crystal display device 100, an element substrate 191 and a color filter substrate 192 disposed so as to face the element substrate 191 are bonded to each other through a frame-shaped sealing material 5. A liquid crystal layer 4 is formed by enclosing a TN (Twisted Nematic) type liquid crystal.

  Here, the liquid crystal display device 100 is a liquid crystal display device for color display configured using four colors of R, G, B, and C, and an a-Si type TFT (Thin Film Transistor) as a switching element. An active matrix liquid crystal display device using the element. The liquid crystal display device 100 is a transmissive liquid crystal display device.

  First, the planar configuration of the element substrate 191 will be described. On the element substrate 191, a plurality of data lines 132, a plurality of scanning lines 33b, a plurality of TFT elements 121, a plurality of pixel electrodes 10, and the like are mainly formed.

  A TFT element 121 is provided in the vicinity of the intersection of each data line 132 and each scanning line 33b, and each TFT element 121 is electrically connected to each data line 132, each scanning line 33b, each pixel electrode 10, and the like. It is connected to the. Each TFT element 121 and each pixel electrode 10 are provided at a position corresponding to each sub-pixel SG. Each pixel electrode 10 is formed of a transparent conductive material such as ITO (Indium-Tin Oxide).

  An area in which a plurality of one pixel AG is arranged in a matrix form is an effective display area V. In the effective display area V, images such as letters, numbers, and figures are displayed. The area outside the effective display area V is a frame area 38 that does not contribute to display. An alignment film 17 is formed on each data line 132, each scanning line 33b, each TFT element 121, each pixel electrode 10, and the like.

  Next, the planar configuration of the color filter substrate 192 will be described. The color filter substrate 192 includes colored portions 6R, 6G, 6B, and 6C having four colors of light shielding layers BM, R, G, B, and C, a common electrode 8, and the like. In the following description, when referring to any color, it is simply referred to as “color filter 6”, and when distinguishing between colors, it is referred to as “colored portion 6R”. The BM is formed at a position that partitions each subpixel SG. The common electrode 8 is made of a transparent conductive material such as ITO like the pixel electrode, and is formed over substantially the entire surface of the color filter substrate 192. The common electrode 8 is electrically connected to one end side of the wiring in the corner region of the sealing material 5, and the other end side of the wiring is connected to an output terminal (grounding terminal) corresponding to the COM of the driver IC. Electrically connected.

  Next, a cross-sectional configuration of the liquid crystal display device 100 will be described with reference to FIG. FIG. 40 is a cross-sectional view taken at a position passing through the color filters 6 of each color of R, G, C, and B, in particular. Note that, between B′-B in FIG. 40, the plurality of sub-pixels SG and pixels AG not shown are similar to the sub-pixels SG and pixels AG corresponding to the coloring portions 6R, 6G, 6B, and 6C. Is formed.

  The substrate body 1 of the element substrate 191 is formed of an insulating material such as glass or quartz. On the substrate body 1, a pixel electrode 10 is formed for each subpixel SG. Data lines 132 are formed on the substrate body 1 and in the vicinity of the edge of each pixel electrode 10. Each pixel electrode 10 is electrically connected to the corresponding data line 132 through the TFT element 121. An alignment film 17 made of a polyimide film or the like is formed above the substrate body 1, the pixel electrode 10, the TFT element 121, and the data line 132. The alignment film 17 is rubbed in a predetermined direction. Yes. In addition, a polarizing plate 111 is disposed on the opposite side of the substrate body 1 from the liquid crystal layer 4 side, and a backlight 115 as an illumination device is disposed on the opposite side of the polarizing plate 111 from the substrate body 1. ing. The backlight 115 is preferably a point light source such as an LED (Light Emitting Diode) or a combination of a linear light source such as a cold cathode fluorescent tube and a light guide plate.

  On the other hand, on the substrate body 2, for each sub-pixel SG, a color filter 6 composed of any of the four colors R, G, B, and C is provided in a stripe shape in the arrangement order of RGCBRGCB. . The colored portions 6R, 6G, 6C, and 6B are opposed to the corresponding pixel electrodes 10. Further, on the substrate main body 2, at positions where the colored portions 6R, 6G, 6C, and 6B are partitioned, the light from one subpixel SG to the other subpixel SG is separated with an adjacent subpixel SG. A light shielding layer BM is formed to prevent mixing. An overcoat layer 19 made of an acrylic resin or the like is formed on the color filter 6 and the light shielding layer BM. The overcoat layer 19 has a function of protecting the color filter 6 and the like from corrosion and contamination due to chemicals and the like used during the manufacturing process of the liquid crystal display device 100. A common electrode 8 made of ITO or the like is formed on the overcoat layer 19. Photo spacers 122 are provided at predetermined positions on the common electrode 8. Note that the photo spacer 122 may be generally referred to as a columnar spacer, a scallop or a rib. An alignment film 120 made of a polyimide film or the like is formed on the common electrode 8 and the photo spacer 122, and the alignment film is rubbed in a predetermined direction. A polarizing plate 112 is disposed on the opposite side of the substrate body 2 from the liquid crystal layer 4. The substrate main body 1 and the substrate main body 2 are opposed to each other with a sealant 5 interposed therebetween, and liquid crystal is sealed between the two substrates to form a liquid crystal layer 4. In the liquid crystal display device 100, the liquid crystal layer 4 is defined to have a constant thickness by the photo spacer 122.

  When transmissive display is performed in the liquid crystal display device 100 having the above configuration, the illumination light emitted from the backlight 115 travels along the path T shown in FIG. 40, and the pixel electrodes 10 and R, G, C, B The colored portions 6R, 6G, 6C, and 6B are passed through to the observer. In this case, the illumination light exhibits a predetermined hue and brightness by passing through the color filter 6 and the like. Thus, a desired color display image is visually recognized by the observer. In particular, since the liquid crystal display device 100 is configured using four colors R, G, C, and B, a decrease in luminance of light of G color having high human visibility is suppressed. In the CIE chromaticity diagram, the color reproduction range (chromaticity region) is larger than that of a liquid crystal display device composed of three colors of R, G, and B.

  Next, FIG. 41 will be described. FIG. 41 is a partial plan view showing a planar layout corresponding to two pixels in the color filter substrate 192. In FIG. 41, in order to facilitate understanding of the relative positional relationship between each element of the color filter substrate 192 and each element of the element substrate 191, the pixel electrode 10, the TFT element 121 provided on the element substrate 191 side, Data lines 132 and scan lines 33b are also shown.

  First, the planar configuration of the color filter substrate 192 will be described.

  On the substrate body 2, a color filter 6 including the colored portions 6 </ b> R, 6 </ b> G, 6 </ b> C, and 6 </ b> B is provided for each subpixel SG. The color filter 6 is arranged in stripes in the arrangement order of the colored portions 6R, 6G, 6C, and 6B in the X direction for each pixel AG. The four colors of the coloring portions 6R, 6G, 6C, and 6B constitute one color pixel that is the minimum unit for color display. A light shielding layer BM is disposed at a position that partitions the colored portions 6R, 6G, 6C, and 6B. An overcoat layer 19 is provided on each of the colored portions 6R, 6G, 6C and 6B and the light shielding layer BM, and a common electrode 8 is provided on the overcoat layer 19 over the entire surface. A photo spacer 122 having a columnar shape is formed on the common electrode 8 in the vicinity of the TFT element 121 of the sub-pixel SG corresponding to the colored portion 6C. In the manufacturing process of the liquid crystal display device 100, the photo spacer 122 is formed by applying an organic insulating film such as an acrylic resin or a polyimide resin on the common electrode 8, and then exposing and developing the film using a photolithography technique. By doing so, it can be formed at a desired position and in a desired shape. When the photo spacer 122 is formed in a columnar shape, the diameter is preferably set to about 10 to 20 μm and the height is set to about 3 to 6 μm. The relative positional relationship between the photo spacer 122 and main elements of the element substrate 191 will be described later. On the common electrode 8 and the surface of the photo spacer 122, an alignment film 120 that has been subjected to a rubbing process is provided. Various known methods can be adopted as the rubbing process.

  Next, a planar positional relationship between main elements of the color filter substrate 192 and main elements of the element substrate 191 will be described.

  In the element substrate 191, the pixel electrode 10 is disposed at a position corresponding to each of the colored portions 6R, 6G, 6C, and 6B. In the element substrate 191, the data lines 132 are arranged so as to extend in the Y direction between the colored portions 6R, 6G, 6C, and 6B adjacent to each other in the X direction. Therefore, each data line 132 overlaps the light shielding layer BM in a plane. Further, on the element substrate 191, the scanning lines 33b are arranged so as to extend in the X direction between the colored portions 6R, 6G, 6C, and 6B adjacent to each other in the Y direction. For this reason, each scanning line 33b overlaps with the light shielding layer BM in a plane. In the element substrate 191, the TFT elements 121 are provided at positions corresponding to the corners of the colored portions 6R, 6G, 6C, and 6B. The photo spacer 122 is near the position corresponding to the corner of the pixel electrode 10 corresponding to the C (cyan) colored portion 6C on the color filter substrate 192 side, and corresponds to the intersection position of the data line 132 and the scanning line 33b. It is provided in the position to do.

  Here, in each subpixel SG corresponding to each coloring portion 6R, 6G, 6C, and 6B, the width in the X direction, which is the direction in which the plurality of data lines 132 are arranged, is preferably equal to each subpixel SG. In other words, it is preferable that the width in the lateral direction of each sub-pixel SG is equal. In addition, it is preferable that the width in the Y direction, which is the direction in which the plurality of scanning lines 33b are arranged, is equal for each subpixel SG. In other words, it is preferable that the width in the longitudinal direction of each sub-pixel SG is equal. In this description, the corresponding colors of the sub-pixels SG will be described with examples of four colors of R (red), B (blue), G (green), and C (cyan). The portion may correspond to hues such as blue-green, yellow, dark green, emerald, and yellow-green described later.

  In the subpixel SG corresponding to any color in each subpixel SG corresponding to each coloring portion 6R, 6G, 6C and 6B, the width in the short side direction or the longitudinal direction is different from that of the subpixel SG corresponding to the other color. When configured in this way, only the sub-pixel SG corresponding to a narrow color is darkly displayed when observed from the short side direction or the long side direction. Therefore, there is a problem that it is difficult to obtain desired display characteristics. Further, there is a problem that it is difficult in the manufacturing process to form only predetermined pixels with a width different from that of other pixels. In that respect, when the width in the short side direction or the long side direction is made equal to that of the sub pixels SG corresponding to the other colors, the sub pixels SG corresponding to all the colors are observed when viewed from the short side direction or the long side direction. The display can be performed with substantially uniform brightness, and the manufacturing process is simplified. Therefore, the above problem does not occur. Note that whether the width in the short side direction or the long side direction is equal can be appropriately selected depending on which direction is mainly observed in the display device.

  Further, it is more preferable that the widths in the short-side direction and the long-side direction are equal in the sub-pixels SG corresponding to all the colors of the coloring portions 6R, 6G, 6C, and 6B. With this configuration, the display quality is not deteriorated and the manufacturing process is simplified even when observed from either the short side direction or the long side direction.

  In addition, in the subpixels SG corresponding to all the colors of the colored portions 6R, 6G, 6C, and 6B, it is more preferable that the areas of the colored portions 6R, 6G, 6C, and 6B in the subpixel SG are equal. With this configuration, the display quality is not deteriorated and the manufacturing process is simplified even when observed from either the short side direction or the long side direction.

  Further, in the sub-pixels SG corresponding to the colored portions 6R, 6G, 6C, and 6B, the width and area of the colored portions 6R, 6G, 6C, and 6B in the sub-pixel SG are formed between the sub-pixels. It is preferable to be defined by the light shielding layer BM. With this configuration, the widths and areas of the sub-pixels SG corresponding to all colors can be formed equally for each sub-pixel simply and accurately.

  In the present embodiment, the light shielding layers BM formed between the sub-pixels have the same width, but the width and area of each colored portion of the sub-pixel SG corresponding to all colors are the same. In order to form, the width of the light shielding layer BM may be varied. With this configuration, the widths and areas of the colored portions of the sub-pixels SG corresponding to all colors can be made equal for each sub-pixel only by changing the width of the light shielding layer BM.

  In the present invention, the light shielding layer BM formed between the sub-pixels is not limited to the configuration provided on the color filter substrate 192 side. For example, the above-described effects can be obtained even when the light shielding layer BM is provided on the element substrate 191 side or the light shielding layer formed on each of the color filter substrate 192 and the element substrate 191 is used as the light shielding layer BM.

  The material of the light shielding layer BM formed between the sub-pixels can be any material that can shield light such as a black resin layer, a laminated structure of colored layers of different colors formed simultaneously with the color filter 6, and a metal layer. The configuration of can also be applied. Further, the data line 132 and / or the scanning line 33b may be used as the light shielding layer without providing the light shielding layer BM or together with the light shielding layer BM. By using the data line 132 and / or the scanning line 33b as a light shielding layer, it is not necessary to separately form a light shielding layer, and the number of steps and manufacturing cost can be reduced.

  In the above description, four examples of R (red), B (blue), G (green), and C (cyan) have been described as examples of the first to fourth colors. The color corresponding to each sub-pixel may be a hue such as blue-green, yellow, dark green, emerald, and yellow-green described later. In the present invention, the color corresponding to each sub-pixel can be selected from a predetermined range of colors according to the characteristics required of the display device.

  Hereinafter, the colored region corresponding to each sub-pixel in the present invention will be described. Here, the colored region is a plurality of colored portions corresponding to a plurality of different colors in a color filter, for example.

  Each colored area comprises one pixel with four colored areas. The four colored areas are the blue hue colored area, the red hue colored area, and the hue from blue to yellow in the visible light area (380 to 780 nm) whose hue changes according to the wavelength. It consists of colored areas of two types of hues selected from among them. Although it is used here as a system, for example, if it is a blue system, it is not limited to a pure blue hue, but includes a bluish purple or a bluish green. If it is a red hue, it is not limited to red but includes orange. These colored regions may be composed of a single colored portion or may be composed of a plurality of colored portions having different hues. In addition, although these colored regions are described in terms of hue, the hue can be set by changing the saturation and lightness as appropriate.

  As a specific hue range, a colored region of a blue hue is blue-violet to blue-green, and more preferably indigo to blue. The colored region of the red hue is orange to red. One colored region selected with a hue from blue to yellow is blue to green, more preferably blue-green to green. The other colored region selected with a hue from blue to yellow is from green to orange, more preferably from green to yellow. Or it is green to yellowish green. Here, the same hue is not used for each colored region. For example, when a green hue is used in two colored regions selected from hues of blue to yellow, the other uses a blue or yellowish green hue for one green. Thereby, a wider range of color reproducibility than the conventional R, G, and B colored regions can be realized.

  Although a wide range of color reproducibility has been described in terms of hue, the following is expressed by the wavelength of light transmitted through the colored region. The blue colored region is a colored region having a wavelength peak of light transmitted through the region of 415 to 500 nm, and preferably a colored region of 435 to 485 nm. The red colored region is a colored region having a wavelength peak of light transmitted through the region of 600 nm or more, and preferably a colored region of 605 nm or more. One colored region selected with a hue from blue to yellow is a colored region in which the peak of the wavelength of light transmitted through the region is 485 to 535 nm, and preferably a colored region that is 495 to 520 nm. The other colored region selected by the hue from blue to yellow is a colored region having a wavelength peak of light transmitted through the region of 500-590 nm, preferably a colored region of 510-585 nm, or 530- This is a colored region at 565 nm.

  Next, it is expressed by an xy chromaticity diagram. The blue colored region is a colored region in which x ≦ 0.151 and y ≦ 0.056, and preferably colored in which 0.134 ≦ x ≦ 0.151 and 0.034 ≦ y ≦ 0.056. It is an area. The red coloring region is a coloring region in which 0.643 ≦ x and y ≦ 0.333, and preferably in a coloring region in which 0.643 ≦ x ≦ 0.690 and 0.299 ≦ y ≦ 0.333. It is an area. One colored region selected in a hue from blue to yellow is a colored region in which x ≦ 0.164, 0.453 ≦ y, and preferably 0.098 ≦ x ≦ 0.164, 0.453. It is a colored region in ≦ y ≦ 0.759. The other colored region selected with a hue from blue to yellow is a colored region in 0.257 ≦ x, 0.606 ≦ y, and preferably 0.257 ≦ x ≦ 0.357, 0.606. It is a colored region in ≦ y ≦ 0.670. These four colored areas can be applied within the above-described range when the sub-pixel includes a transmission area and a reflection area.

  As the backlight of the present invention, an LED, a fluorescent tube, or an organic EL may be used as an RGB light source. Alternatively, a white light source may be used. The white light source may be a white light source generated by a blue light emitter and a YAG phosphor. The following are preferable as the RGB light source. B has a wavelength peak at 435 nm to 485 nm. G has a wavelength peak at 520 nm to 545 nm. R has a wavelength peak at 610 nm-650 nm. A wider range of color reproducibility can be obtained by appropriately selecting the color filter according to the wavelength of the RGB light source. In addition, a light source having a plurality of peaks, for example, having peaks at wavelengths of 450 nm and 565 nm may be used.

  As an example of the configuration of the four colored regions, for example, colored regions of red, blue, green, and yellow. Colored areas with hues of red, blue, dark green, and yellow. Colored areas of red, blue, emerald, and yellow. Colored areas with hues of red, blue, dark green, and yellowish green. Colored areas with hues of red, blue-green, dark green, and yellow-green are exemplified.

  In addition, it is possible to make each said color and hue respond | correspond to the said subpixel SG as the coloring parts 6R, 6G, 6B, and 6C. For example, red, yellow-green, dark green, and blue colored portions are provided, or the above-described red-based colored region and the other colored region selected from the blue to yellow hues for the sub-pixel SG, respectively. The one colored region selected by the hue from blue to yellow and the blue colored region can correspond to each other.

[Electronics]
An example of an electronic apparatus including the liquid crystal display device of the above embodiment will be described.
FIG. 25 is a perspective view showing an example of a mobile phone. In FIG. 25, reference numeral 1000 denotes a mobile phone body, and reference numeral 1001 denotes a display unit using the liquid crystal display device.
Since the electronic device shown in FIG. 25 includes the liquid crystal display device of the above-described embodiment, a portable electronic device including a liquid crystal display unit with excellent color reproducibility can be realized.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, an example in which the present invention is applied to an active matrix type transflective liquid crystal display device or an organic EL device using a TFT element has been shown. However, the present invention is not limited to this, and a polysilicon TFT element is used. The present invention can also be applied to liquid crystal display devices such as an active matrix type used, an active matrix type using a TFD element, a passive matrix type, a transmission type, and a reflection type. Alternatively, the present invention can be applied not only to a liquid crystal display device and an organic electroluminescence device but also to various display devices such as a plasma display. Furthermore, examples of the electronic device of the present invention include a portable information terminal (PDA), a photo viewer, and the like in addition to a mobile phone.

1 is a perspective view illustrating a schematic configuration of a liquid crystal display device according to a first embodiment of the present invention. 4 is an xy chromaticity diagram showing a color reproduction range of the liquid crystal display device. FIG. FIG. 6 is a u′v ′ chromaticity diagram showing a color reproduction range of the liquid crystal display device. FIG. 3 is a diagram illustrating spectral characteristics of a color filter of Example 1. FIG. 3 is a diagram showing spectral characteristics of the backlight of Example 1. 2 is an xy chromaticity diagram of Example 1. FIG. FIG. 4 is a u′v ′ chromaticity diagram of Example 1. 6 is a diagram illustrating spectral characteristics of a color filter of Example 2. FIG. FIG. 6 is a diagram showing the spectral characteristics of the backlight of Example 2. 6 is an xy chromaticity diagram of Example 2. FIG. FIG. 6 is a u′v ′ chromaticity diagram of Example 2. 6 is a diagram illustrating spectral characteristics of a color filter according to Example 3. FIG. FIG. 6 is a diagram showing the spectral characteristics of the backlight of Example 3. 6 is an xy chromaticity diagram of Example 3. FIG. 14 is a u′v ′ chromaticity diagram of Example 3. FIG. 6 is a diagram illustrating spectral characteristics of a color filter according to Example 4. FIG. FIG. 6 is a diagram showing the spectral characteristics of the backlight of Example 4. FIG. 10 is an xy chromaticity diagram of Example 4. FIG. 10 is a u′v ′ chromaticity diagram of Example 4. FIG. 10 is a diagram illustrating spectral characteristics of a color filter of Example 5. FIG. 10 is a diagram showing the spectral characteristics of the backlight of Example 5. FIG. 10 is an xy chromaticity diagram of Example 5. FIG. 10 is a u′v ′ chromaticity diagram of Example 5. FIG. 10 is a u′v ′ chromaticity diagram showing a color reproduction range of the video display device of Patent Document 1. It is a perspective view which shows an example of the electronic device of this invention. 10 is a diagram illustrating spectral characteristics of a color filter according to Example 6. FIG. It is a figure which shows the spectral characteristics of the backlight of Example 6. FIG. FIG. 10 is an xy chromaticity diagram of Example 6. FIG. 10 is a u′v ′ chromaticity diagram of Example 6. It is sectional drawing which shows schematic structure of the organic EL apparatus which is 2nd Embodiment of this invention. FIG. 10 is a diagram illustrating spectral characteristics of a color filter of Example 7. It is a figure which shows the spectral characteristics of the backlight of Example 7. FIG. FIG. 10 is an xy chromaticity diagram of Example 7. FIG. 10 is a u′v ′ chromaticity diagram of Example 7. It is sectional drawing which shows schematic structure of the organic EL apparatus which is 3rd Embodiment of this invention. FIG. 10 is a diagram illustrating spectral characteristics of a color filter of Example 8. It is a figure which shows the spectral characteristics of the backlight of Example 8. FIG. FIG. 10 is an xy chromaticity diagram of Example 8. FIG. 10 is a u′v ′ chromaticity diagram of Example 8. It is sectional drawing which shows schematic structure of the liquid crystal display device which is 4th Embodiment of this invention. It is a top view which shows schematic structure of the pixel of the liquid crystal display device which is 4th Embodiment of this invention.

Explanation of symbols

  3 ... Liquid crystal display device 13, 28 ... Color filter, 13R, 28R ... Red colored part, 13G, 28G ... Green colored part, 13B, 28B ... Blue colored part, 13C, 28C ... Cyan colored part, 20, 40 ... Organic EL device.

Claims (23)

A display device that performs color display by emitting colored light of a plurality of different colors,
A plurality of sub-pixels corresponding to the plurality of colors;
A plurality of colored portions formed in portions corresponding to the sub-pixels, and a color filter formed corresponding to the plurality of sub-pixels,
Within the plurality of subpixels, the widths of the colored portions in the longitudinal direction or the lateral direction are equal,
The plurality of different colors are represented in an xy chromaticity diagram.
A first color in the range of 0.643 ≦ x, y ≦ 0.333;
A second color in the range of 0.257 ≦ x, 0.606 ≦ y;
a third color in the range of x ≦ 0.164, 0.453 ≦ y;
A display device comprising a fourth color in a range of x ≦ 0.151 and y ≦ 0.056. A display device that performs color display by emitting colored light of a plurality of different colors,
A plurality of sub-pixels corresponding to the plurality of colors;
A plurality of colored portions formed in portions corresponding to the sub-pixels, and a color filter formed corresponding to the plurality of sub-pixels,
Within the plurality of subpixels, the widths of the colored portions in the longitudinal direction or the lateral direction are equal,
In the u′v ′ chromaticity diagram, the different colors are
A first color in the range of 0.450 ≦ u ′;
A second color in the range of 0.569 ≦ v ′;
a third color in the range u ′ ≦ 0.076;
A display device comprising a fourth color in a range of v ′ ≦ 0.149. A display device that performs color display by emitting colored light of a plurality of different colors,
A plurality of sub-pixels corresponding to the plurality of colors;
A plurality of colored portions formed in portions corresponding to the sub-pixels, and a color filter formed corresponding to the plurality of sub-pixels,
Within the plurality of subpixels, the widths of the colored portions in the longitudinal direction or the lateral direction are equal,
The different colors include a first color of a red hue,
A second color and a third color of two hues selected from hues from blue to yellow;
A display device comprising a fourth color of a blue hue.   The display device according to claim 3, wherein the blue hue is a hue from blue purple to blue green.   The display device according to claim 4, wherein the blue hue is indigo to blue.   The display device according to claim 3, wherein the red hue is an orange to red hue.   4. The display device according to claim 3, wherein one of the two hues selected from the blue to yellow hues is a blue to green hue.   The display device according to claim 7, wherein one of the two types of hues is a blue-green to green hue.   The display device according to claim 3, wherein the other of the two hues selected from the hues from blue to yellow is a hue from green to orange.   The display device according to claim 9, wherein the other of the two hues is a hue from green to yellow.   The display device according to claim 9, wherein the other of the two kinds of hues is a hue of green to yellow-green. A display device that performs color display by emitting colored light of a plurality of different colors,
A plurality of sub-pixels corresponding to the plurality of colors;
A plurality of colored portions formed in portions corresponding to the sub-pixels, and a color filter formed corresponding to the plurality of sub-pixels,
Within the plurality of subpixels, the widths of the colored portions in the longitudinal direction or the lateral direction are equal,
The color filter has a first color whose wavelength of light transmitted through the color filter is 600 nm or more, a second color at 500 to 590 nm, and a third color at 485 to 535 nm, A display device having a fourth color of 400-500 nm.   The display device according to claim 12, wherein the first color has a wavelength peak of light of 605 nm or more transmitted through the color filter.   The display device according to claim 12, wherein the second color has a wavelength peak of 510 to 585 nm of light transmitted through the color filter.   The display device according to claim 12, wherein the second color has a wavelength peak of light of 530 to 565 nm transmitted through the color filter.   The display device according to claim 12, wherein the third color has a peak wavelength of 495 to 520 nm of light transmitted through the color filter.   The display device according to claim 12, wherein the fourth color has a wavelength peak of light transmitted through the color filter at 435 to 485 nm.   Within the plurality of sub-pixels, the width in the longitudinal direction or the short-side direction of each colored portion is defined by a light shielding film formed in a region between adjacent sub-pixels among the plurality of sub-pixels. The display device according to claim 1, wherein the display device is a display device. A backlight that emits light for transmitting the color filter;
The backlight is
There is a peak of blue light wavelength at 435nm-485nm,
The peak of the wavelength of green light is at 520 nm-545 nm,
19. The display device according to claim 1, wherein the wavelength peak of red light is in a range of 610 nm to 650 nm.   The display device according to claim 19, wherein the backlight includes any one of a light emitting diode, a fluorescent tube, and an organic electroluminescence device. An organic electroluminescence device that emits light for transmitting the color filter;
The light emitting part of the organic electroluminescence device has a white light emitting layer that emits white light, and the color light of the plurality of colors is obtained by a combination of the color filter and the white light emitting layer. The display device according to claim 18. An organic electroluminescence device that emits light for transmitting the color filter;
The light emitting part of the organic electroluminescence device has a red light emitting layer that emits red light, a green light emitting layer that emits green light, and a blue light emitting layer that emits blue light,
A combination of a colored portion corresponding to the first color of the color filter and a red light emitting layer of the light emitting portion;
A combination of a colored portion corresponding to the second color of the color filter and a green light emitting layer of the light emitting portion;
A combination of a colored portion corresponding to the third color of the color filter and a green light emitting layer of the light emitting portion;
The color light of the plurality of colors is obtained by a combination of a colored portion corresponding to the fourth color of the color filter and a blue light emitting layer of the light emitting portion. The display device described in 1. An electronic apparatus comprising the display device according to any one of claims 1 to 22.

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