JP6268710B2 - Color filter and organic electroluminescence display device - Google Patents

Description

  The present invention, when used in an organic electroluminescence display device, can perform display with good luminance while suppressing display defects due to reflection of external light, and can perform good white display in white subpixels. The present invention relates to a color filter and an organic electroluminescence display device using the color filter.

  An organic electroluminescence (hereinafter abbreviated as “organic EL”) display device has high visibility due to self-coloring, and, unlike a liquid crystal display device, is an all-solid-state display, has excellent impact resistance, and has a high response speed. Attention has been focused on advantages such as little influence from temperature changes and a large viewing angle.

The organic EL display device has an organic EL element based on a laminated structure in which an anode, an organic EL layer including a light emitting layer, and a cathode are laminated in this order. In addition, the organic EL display device can perform color display by the color of light from the light emitting layer of the organic EL element. In order to perform color display with better color development, the light emitting layer and the colored layer are provided. A combination with a color filter is also widely used.
In such an organic EL display device, since display is performed by driving an organic EL element, it is required to perform display with high luminance with lower power consumption.

  Therefore, in recent years, an organic EL display device including a pixel unit having four sub-pixels in which a white sub-pixel is added to three sub-pixels of red, green, and blue has been proposed (for example, Patent Document 1). ). In the organic EL display device described above, as a color filter, a transparent base material, and a colored portion provided on the transparent base material in a pattern shape corresponding to the three-color sub-pixels and having a patterned colored layer; It has been proposed to use a pixel having a white portion having a transparent layer that is provided in a pattern corresponding to a white subpixel and transmits white light as it is.

  Incidentally, one of the anode and the cathode of the organic EL element in the organic EL display device is usually composed of a metal electrode layer. Therefore, in an organic EL display device, when used outdoors, there is a problem that display failure such as a decrease in contrast occurs due to external light being reflected by the metal electrode layer of the organic EL element.

To solve the above-described problem, for example, a technique for preventing external light reflection by providing a circularly polarizing plate on the observer side of the organic EL display device has been proposed.
However, when a circularly polarizing plate is used, the above-described display failure due to external light reflection can be suppressed, but the circularly polarizing plate prevents transmission of light such as white light emitted from the organic EL element of the organic EL display device. Therefore, there is a problem that only a luminance of 50% or less can be obtained as compared with the luminance when the circularly polarizing plate is not used.

JP 2007-516564 A

  In view of the above circumstances, the present inventors have conducted intensive research, and as a result, found that the above-described display failure due to external light reflection is mainly due to external light reflection in the white subpixel of the organic EL display device. . Accordingly, the present inventors suppress the above-described display failure due to the reflection of external light in the organic EL display device by forming a light absorption layer capable of absorbing external light in the white portion of the color filter. However, an attempt was made to realize display with good luminance. In making such an attempt, the present inventors further adjust the transmission spectrum of the white part and attenuate the intensity of green light contained in the reflected light from the intensity of light of other colors, It has been found that the reflected light can be made difficult to be recognized by the observer, and better white display can be performed in the white subpixel. The present invention has been made based on the above findings.

  The present invention, when used in an organic EL display device, can perform display with good luminance while suppressing display defects due to reflection of external light, and can perform good white display in a white subpixel. A main object is to provide a filter and an organic EL display device using the filter.

  In order to solve the above-described problems, the present invention provides a transparent base material, a colored portion having a patterned colored layer provided on the transparent substrate, and a patterned white portion provided on the transparent substrate. And a light absorption layer composed of a resin containing a colorant is formed on the white part on the transparent substrate, and the average transmittance of the white part is 50% to 98%. The color filter is characterized in that the transmission spectrum of the white portion has a minimum value in a wavelength range of 500 nm to 650 nm.

According to the present invention, since the light absorption layer is formed in the white portion, when the color filter of the present invention is used in an organic EL display device, it is possible to suppress a display defect due to reflection of external light and to be favorable. The display can be performed with luminance.
In addition, according to the present invention, since the transmission spectrum of the white portion has a minimum value in the above-described wavelength range, a good white display can be performed in the white subpixel of the organic EL display device.

  In the said invention, it is preferable that the difference of the average transmittance | permeability of the wavelength range of 380 nm-500 nm and the average transmittance | permeability of the wavelength range of 650 nm-780 nm of the said white part exists in the range of +/- 30%. By setting the difference in the average transmittance of each wavelength region within the above-described range, the transmission spectrum of the white part other than the wavelength region of 500 nm to 650 nm can be made flatter, and the color filter of the present invention is used. The reflected light can be made more difficult to be recognized by the observer in the white subpixel of the organic EL display device.

  In the said invention, the said colored part contains the blue colored part which has a pattern-like blue colored layer, and at least one part of the said white part on the said transparent base material is comprised from the same material as the said blue colored layer. A light adjustment layer may be formed. By using the light absorbing layer and the light adjusting layer in combination, the average transmittance of the white part and the transmission spectrum of the white part of the color filter of the present invention can be adjusted to desired values.

  The present invention has a transparent substrate, a colored portion provided on the transparent substrate and having a patterned colored layer, and a patterned white portion provided on the transparent substrate, and the transparent substrate A light absorption layer composed of a resin containing a colorant is formed in the white part above, and the average transmittance of the white part is in the range of 50% to 98%, and the white part is transmitted. A color filter having a minimum value in a wavelength range of 500 nm to 650 nm, a counter substrate, and an organic EL element formed on the counter substrate and having an organic EL layer including a light emitting layer, and Provided is an organic EL display device in which the organic EL element is disposed between a color filter and the counter substrate.

  According to the present invention, by having the above-described color filter, it is possible to perform display with good luminance while suppressing display defects due to external light reflection, and it is possible to perform good white display in the white subpixel. An organic EL display device can be obtained.

  The present invention has a transparent substrate, a colored portion provided on the transparent substrate and having a patterned colored layer, and a patterned white portion provided on the transparent substrate, and the transparent substrate A light absorption layer composed of a resin containing a colorant is formed in the white part above, and the average transmittance of the white part is in the range of 50% to 98%, and the white part is transmitted. A color filter having a minimum value in a wavelength range of 500 nm to 650 nm, and an organic EL element formed on the colored layer of the color filter and having an organic EL layer including a light emitting layer. An organic EL display device is provided.

  According to the present invention, by having the above-described color filter, it is possible to perform display with good luminance while suppressing display defects due to external light reflection, and it is possible to perform good white display in the white subpixel. An organic EL display device can be obtained.

  When used in an organic EL display device, the color filter of the present invention can perform display with good luminance while suppressing display defects due to reflection of external light, and can perform good white display in white subpixels. There is an effect that can be done.

It is a schematic sectional drawing which shows an example of the color filter of this invention. It is a schematic sectional drawing which shows the other example of the color filter of this invention. It is a schematic sectional drawing which shows an example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is explanatory drawing explaining an example of the display method using the organic electroluminescence display of this invention. It is process drawing which shows an example of the manufacturing method of the color filter of this invention. It is explanatory drawing explaining an example of the display method using the conventional organic EL display apparatus. It is explanatory drawing explaining the other example of the display method using the conventional organic EL display apparatus. It is a graph which shows the transmission spectrum of the white part of the color filter of Examples 1-4 and a comparative example.

  Hereinafter, the color filter and the organic EL display device of the present invention will be described.

A. Color filter The color filter of the present invention comprises a transparent substrate, a colored portion provided on the transparent substrate and having a patterned colored layer, and a patterned white portion provided on the transparent substrate. A light absorption layer composed of a resin containing a colorant is formed on the white part on the transparent substrate, and the average transmittance of the white part is within a range of 50% to 98%. In addition, the transmission spectrum of the white portion has a minimum value in a wavelength region of 500 nm to 650 nm.

  Here, the colored portion and the white portion in the present invention correspond to the colored subpixel and the white subpixel constituting the pixel portion of the organic EL display device when the color filter of the present invention is used in the organic EL display device. The part arrange | positioned so that it may do.

  Moreover, when the transmittance | permeability of a white part measures the transmittance | permeability of a white part over the visible light whole region (380 nm-780 nm) that the transmission spectrum of a white part has a minimum value in the wavelength range of 500 nm-650 nm It means having a wavelength at which the transmittance of the white part is the minimum value.

Further, in the following description, transmitted light refers to light from the light emitting layer that has passed through the white part, and the laminated portion of the transparent base material and the light absorbing layer in the white part is once applied from one surface to the other surface. Light transmitted from the light emitting layer.
Reflected light refers to external light reflected from the white part, and is reflected by a metal or the like after passing through the laminated part of the transparent base material and the light absorbing layer in the white part from one side to the other side. Again, it refers to external light that has passed through the laminated portion from the other surface to one surface, that is, transmitted through the laminated portion twice.

  In the following description, light obtained by transmitting light from the light emitting layer through the colored portion may be referred to as colored transmitted light, and external light reflected from the colored portion may be referred to as colored reflected light. .

The color filter of the present invention will be described with reference to the drawings.
1 and 2 are schematic cross-sectional views showing an example and other examples of the color filter of the present invention. As illustrated in FIGS. 1 and 2, the color filter 10 of the present invention includes a transparent base material 1 and a patterned colored layer (a red colored layer 2R in FIGS. 1 and 2) provided on the transparent base material 1. A colored portion 10C (in FIG. 1 and FIG. 2, a red colored portion 10R, a green colored portion 10G, and a blue colored portion 10B) having a green colored layer 2G and a blue colored layer 2B) and the transparent substrate 1 are provided. The white portion 10W on the transparent substrate 1 is formed with a light absorbing layer 3 made of a resin containing a coloring material. Further, the color filter 10 of the present invention is characterized in that the average transmittance of the white portion 10W is in a range of 50% to 98%, and the transmission spectrum of the white portion 10W has a minimum value in a wavelength region of 500 nm to 650 nm. And
1A and 1B show an example in which the light absorption layer 3 is formed in a pattern on the white portion 10W on the transparent substrate 1, and FIG. 1C shows the light absorption. An example in which the layer 3 is formed on the entire surface of the transparent substrate 1 including the white portion 10W is shown.
In addition, as illustrated in FIGS. 2A and 2B, when the colored portion 10 </ b> C includes the blue colored portion 10 </ b> B having the patterned blue colored layer 2 </ b> B, the white portion 10 </ b> W on the transparent substrate 1 At least in part, the light adjustment layer 4 made of the same material as the blue colored layer 2B may be formed.
Moreover, as illustrated in FIGS. 1A and 1B and FIGS. 2A and 2B, the color filter 10 of the present invention partitions the colored portions 10R, 10G, and 10B and the white portion 10W. You may have the light-shielding part 5. FIG. Further, as illustrated in FIG. 4 described later, a protective layer 6 may be formed on the colored layers 2R, 2G, 2B and the light absorption layer 3.

The color filter of the present invention is used for an organic EL display device. Such an organic EL display device will be described with reference to the drawings.
FIG. 3 is a schematic cross-sectional view showing an example of an organic EL display device using the color filter of the present invention. FIG. 3 shows an example in which the organic EL display device is a top emission type organic EL display device. As illustrated in FIG. 3, the organic EL display device 100 includes a color filter 10, a counter substrate 20, and an organic EL element 30 formed on the counter substrate 20. An organic EL element 30 is disposed between the base materials 20. Moreover, the organic EL element 30 is normally formed on the first electrode layer 31a on the counter substrate 20, the organic EL layer 32 including the light emitting layer, and the organic EL layer 32 formed on the first electrode layer 31a. It has the 2nd electrode layer 31b formed on it. In this case, for example, a metal electrode layer is used for the first electrode layer 31a, and a transparent electrode layer is used for the second electrode layer 31b. In the present invention, the sealing material 40 is usually disposed between the color filter 10 and the counter substrate 20 and on the outer periphery of the color filter 10 and the counter substrate 20. The color filter 10 can be the same as the content described in FIG. 1, and thus the description thereof is omitted here.
Although not shown, when the organic EL display device is a top emission type organic EL display device, the organic EL element is arranged so that the side opposite to the light absorption layer side of the color filter faces the organic EL element. Also good.

FIG. 4 is a schematic sectional view showing another example of the organic EL display device using the color filter of the present invention. FIG. 4 shows an example in which the organic EL display device is a bottom emission type organic EL display device. In this case, the organic EL display device 100 includes a color filter 10 and an organic EL element 30 formed on the protective layer 6 of the color filter 10. The organic EL element 30 is typically a first electrode layer 31a formed on the color filter 10, an organic EL layer 32 formed on the first electrode layer 31a, and a second electrode formed on the organic EL layer 32. And an electrode layer 31b. In this case, for example, a transparent electrode layer is used for the first electrode layer 31a, and a metal electrode layer is used for the second electrode 31b. As shown in FIG. 4, the bottom emission type organic EL display device 100 may have a counter substrate 20. In this case, the opposing base material 20 is used as a sealing base material, and can be used together with the sealing material 40, for example.
Note that the reference numerals not described in FIG. 4 can be the same as the reference numerals described in FIG. 1 and FIG.

According to the present invention, since the light absorption layer is formed in the white portion, when the color filter of the present invention is used in an organic EL display device, it is possible to suppress a display defect due to reflection of external light and to be favorable. The display can be performed with luminance.
In addition, according to the present invention, since the transmission spectrum of the white portion has a minimum value in the above-described wavelength range, a good white display can be performed in the white subpixel of the organic EL display device.

More specifically, according to the present invention, since the light absorption layer is formed in the white portion, when the color filter of the present invention is used in the organic EL display device, the light is incident on the inside of the organic EL display device. Since a part of the external light can be absorbed by the light absorption layer, the intensity of the reflected light can be attenuated, and the occurrence of display defects due to the reflection of the external light can be suppressed. In addition, when the average transmittance of the white portion is within the above range, the transmitted light emitted to the outside of the organic EL display device in the white subpixel of the organic EL display device can be obtained even when the light absorption layer is formed. It is possible to suppress a decrease in luminance.
In addition, since the transmission spectrum of the white portion has a minimum value in the above-described wavelength range, the intensity of the green light contained in the reflected light can be made lower, so that the reflected light is not easily recognized by the observer. It becomes possible. Therefore, good white display can be performed in the white subpixel of the organic EL display device.

  Here, the effect when the color filter of the present invention is used in an organic EL display device will be described in comparison with the case where a conventional color filter is used in an organic EL display device.

First, a case where a conventional color filter is used in an organic EL display device will be described.
7 and 8 are explanatory diagrams for explaining an example of a display method using an organic EL display device (conventional organic EL display device) using a conventional color filter and another example. In the following description, the case where the light from the light emitting layer of the organic EL element corresponding to each subpixel is white light will be described.
Conventionally, in the organic EL display device 100 ′ having white sub-pixels exemplified in FIGS. 7A and 7B, display defects due to reflection of external light have been cited as a problem. When completing the present invention, the present inventors first found that the above display failure is mainly caused by external light reflection in the white subpixel of the organic EL display device 100 ′.
That is, when the organic EL display device 100 ′ is used outdoors, as illustrated in FIG. 7A, the external light Ls is emitted from the red colored portion 10R of the color filter 10 ′ disposed on the viewer side, green-colored. The light passes through the colored portion 10C such as the portion 10G and the blue colored portion 10B and the white portion 10W, and enters the organic EL display device 100 ′. The external light Ls is reflected by the first electrode layer 31a (metal electrode layer) of the organic EL element 30, and is again transmitted through the colored portion 10C and the white portion 10W of the color filter 10 ′, and the organic EL display device. 100 'is emitted as colored reflected light such as red reflected light Lr (R), green reflected light Lr (G), and blue reflected light Lr (B), and reflected light Lr'.
On the other hand, as illustrated in FIG. 7B, the white light Lw passes through the above-described colored portion 10C and the white portion 10W of the color filter 10 ′ arranged on the viewer side, and is transmitted through the organic EL display device 100 ′. The light is emitted to the outside as red transmitted light Lt (R), green transmitted light Lt (G), blue transmitted light Lt (B), and transmitted light Lt ′.
Here, as illustrated in FIGS. 7A and 7B, in the conventional organic EL display device 100 ′, as the color filter 10 ′, a patterned colored layer (in FIG. 7, a red colored layer 2R, a green color). What has the colored part 10C which has the colored layer 2G and the blue colored layer 2B), and the white part 10W which has the transparent layer 7 which permeate | transmits white light Lw as it is is used. Further, the transparent layer 7 described above generally has a property of allowing the external light Ls to pass through as it is. Therefore, as illustrated in FIG. 7A, in the white sub-pixel of the organic EL display device 100 ′, the external light Ls incident on the inside of the organic EL display device 100 ′ is reflected while maintaining the same intensity. It is emitted as light Lr ′. On the other hand, in the colored subpixel of the organic EL display device 100 ′, the external light Ls incident on the organic EL display device is colored after a part of the light is absorbed by the colored layer in the process of passing through the colored layer twice. Since it is emitted as reflected light, it becomes light with a very small intensity compared with the reflected light Lr ′ in the white sub-pixel described above.
Therefore, as illustrated in FIGS. 7A and 7B, when the organic EL display device 100 ′ is used outdoors, the transmitted light Lt ′ and the reflected light Lr ′ having high intensity are generated in the white subpixel. In contrast, since the colored sub-pixel emits colored transmitted light and colored reflected light having a very small intensity with respect to the reflected light Lr ′, the difference in intensity between the reflected light and the colored reflected light is emitted. As a result, the luminance of the white sub-pixel is relatively high and the luminance of the other colored sub-pixels is relatively low, which causes problems such as a decrease in contrast.

  Further, with respect to the above problem, as illustrated in FIGS. 8A and 8B, it has been proposed to arrange the circularly polarizing plate 50 on the observer side of the organic EL display device 100 ″. The circularly polarizing plate 50 is formed by laminating a polarizing film and a retardation film, and the retardation film is controlled so that the retardation becomes 1/4 of the wavelength of light. When such a circularly polarizing plate 50 is used, as illustrated in Fig. 8A, the external light Ls incident on the color filter 10 'is first linearly polarized by the polarizing film, and then the retardation film. Then, the circularly polarized state is reversed when reflected by the first electrode layer 31a of the organic EL element 30. After that, when the reflected light passes through the retardation film again, Color fill Therefore, the linearly polarized light is absorbed when it reaches the polarizing film again, so that the circularly polarizing plate 50 having the above-described characteristics can be obtained. By providing the external light Ls that has entered the organic EL display device 100 ″, as illustrated in FIG. 8A, the external light Ls can be hardly emitted as reflected light or colored reflected light. However, when the circularly polarizing plate 50 is provided, as illustrated in FIG. 8B, the intensity of the white light Lw emitted from the light emitting layer of the organic EL layer 32 of the organic EL element 30 is also equal to the circularly polarizing plate 50. The intensity of red transmitted light Lt (R) ", green transmitted light Lt (G)", blue transmitted light Lt (B) ", and transmitted light Lt" is greatly reduced. As a result, the luminance of the organic EL display device 100 ″ decreases.

On the other hand, the color filter of the present invention can eliminate the above-described problems when the circularly polarizing plate is not used and the problems when the circularly polarizing plate is used by using the light absorption layer as follows. it can.
5A and 5B are explanatory views showing an example of a display method using an organic EL display device using the color filter of the present invention (organic EL display device of the present invention).
First, the effect | action with respect to reflected light Lr is demonstrated using Fig.5 (a). Here, in this invention, since the light absorption layer 3 is comprised from resin containing a coloring material, it has a function which absorbs light. Therefore, in the organic EL display device 100 using the color filter 10 of the present invention, in the white portion 10W, in the process in which the external light Ls is transmitted twice through the laminated portion of the light absorption layer 3 and the transparent base material 1, respectively. Since part of the light is absorbed, the reflected light Lr is attenuated compared to the original outside light Ls, and becomes light with a low intensity. Therefore, since the intensity of the reflected light Lr observed in the white subpixel of the organic EL display device 100 can be reduced, it is possible to suppress the above-described display failure due to external light reflection. Note that the behavior of the colored reflected light in the colored portion 10C of the organic EL display device 100 is the same as that described with reference to FIG.

Next, the effect | action with respect to transmitted light is demonstrated using FIG.5 (b). In the present invention, since the white portion 10W includes the light absorption layer 3, a part of the white light Lw is absorbed, but the average transmittance of the white portion 10W is within the above-described range. The attenuation of the intensity of the white light Lw due to transmission through the light absorption layer 3 can be made small. More specifically, the attenuation of the intensity of the white light Lw can be made smaller than when the circularly polarizing plate is arranged on the viewer side.
In addition, by using the light absorption layer 3 described above, it is not necessary to arrange the circularly polarizing plate 50 in the colored sub-pixel of the organic EL display device. Therefore, the red transmitted light Lt (R) and the green transmitted light Lt ( G) and the blue transmitted light Lt (B) can have good luminance, and the entire organic EL display device 100 can have good luminance.

  Note that reference numerals that are not described in FIGS. 5, 7, and 8 can be the same as those described in FIGS. 1, 3, and the like, and thus description thereof is omitted here.

Since the color filter of the present invention further has a minimum value in the wavelength range of 500 nm to 650 nm in the transmission spectrum of the white portion, the intensity of green light contained in the reflected light can be further reduced. Good white display can be performed in the white subpixel of the EL display device.
The reason for this is considered as follows.
When a color filter having a light absorption layer formed in the white part is used in an organic EL display device, transmitted light and reflected light whose intensity is attenuated by the light absorption layer are observed in the white subpixel of the organic EL display device. Is done. Therefore, when the reflected light has color, there is a concern that it is difficult to perform a desired white display in the white subpixel. Since the color of the reflected light is determined by the transmission characteristics of the white part, in order to avoid the above-mentioned concern, for the transmission characteristics of the white part, for example, the transmission spectrum in the visible light region is made flat and the reflected light It can be considered that it is preferable to make the intensity of light of each color in the visible light region included in the film uniform.
However, since the human eye can easily perceive green light in the visible light range, even if the intensity of light of each color in the visible light range of reflected light is uniform, the observer May recognize green light contained in the reflected light.
On the other hand, the color filter of the present invention has a minimum value in the wavelength range of 500 nm to 650 nm in the transmission spectrum of the white portion, so the intensity of green light contained in the reflected light is compared with the intensity of light of other colors. Therefore, the reflected light can be made harder to be observed by the observer.

Moreover, the color filter of the present invention can suppress reflection unevenness in the organic EL display device because the transmission spectrum of the white portion has a minimum value in the wavelength range of 500 nm to 650 nm. The reason for this is considered as follows.
Here, the reflection unevenness is caused by the fact that external light incident on one subpixel from an oblique direction with respect to the display surface in the organic EL display device is reflected by the metal electrode layer of the organic EL element, and other subpixels of different colors. This is a problem that occurs because two colors of light are mixed and observed by a viewer in a part of the other sub-pixels. Such reflection unevenness is particularly easily observed when external light incident from the colored subpixel is emitted as reflected light from the white subpixel.
As described above, when the light absorption layer is formed in the white portion, it is possible to attenuate the reflected light that causes the above-described reflection unevenness, so that the uneven reflection in the white portion is suppressed. Is possible. However, as described above, since the visibility of green light is high, when the white portion has a flat transmission characteristic, external light incident from the green sub-pixel is emitted as reflected light from the white sub-pixel. There is a concern that the uneven reflection due to the above cannot be sufficiently suppressed.
On the other hand, the color filter of the present invention has a minimum value in the wavelength region of 500 nm to 650 nm of the white portion, so that the intensity of green light contained in the reflected light is attenuated more than the intensity of light of other colors. It is also possible to sufficiently suppress reflection unevenness caused by external light incident from the green subpixel being emitted as reflected light from the white subpixel.

  In the above description, for ease of explanation, the case where the average transmittance of the transparent base material and the influence of the transmission spectrum are not taken into account has been described. However, the transparent base material has the transmission characteristics described above in the organic EL display device. In the case where the above problem is affected, it is possible to adjust the average transmittance and transmission spectrum of the white portion using the light absorption layer in consideration of these.

As described above, the color filter of the present invention has a light absorption layer and, if necessary, a light adjustment layer formed on the white portion on the base material, so that the white portion has a predetermined average transmittance and transmission spectrum. The transmission characteristics such as In other words, the color filter of the present invention is characterized in that it can be adjusted using a light absorption layer or the like so that the white portion of the color filter exhibits a predetermined transmission characteristic.
Details of the color filter of the present invention will be described below.

1. Characteristics of the color filter The color filter of the present invention has the above-mentioned transmission characteristics as a result of the light absorption layer described later and a light adjustment layer being formed as necessary in the white part on the transparent substrate. It is characterized by. In other words, the light absorption layer is adjusted so that the white portion has the above-described transmission characteristics. More specifically, the adjustment of the transmission characteristics in the white part is performed by adjusting the composition and thickness of the light absorbing layer such as the type of the coloring material contained in the resin constituting the light absorbing layer and the content of the coloring material. It is characterized by being performed.
Hereinafter, the transmission characteristics of the white part, which are conditions for adjusting the composition and thickness of the light absorption layer, will be described.

  The color filter of the present invention is characterized in that the average transmittance of the white part is in the range of 50% to 98%, and the transmission spectrum of the white part has a minimum value in the wavelength range of 500 nm to 650 nm.

  Here, in the white part, since a light absorption layer composed of a resin containing a colorant is formed, the reflectance of external light in the white part is smaller than when a conventional transparent layer is provided. It is possible to attenuate the intensity of the reflected light. However, when the purpose is only to attenuate the intensity of the reflected light, the average transmittance of the white portion is also reduced, so that the intensity of the transmitted light becomes weak and it becomes difficult to display with good luminance. Is concerned.

Therefore, the present invention is characterized in that the average transmittance of the white portion is in the range of 50% to 98%. In the present invention, by setting the average transmittance to be equal to or higher than the above lower limit value, when the color filter of the present invention is used in an organic EL display device, it is possible to perform display with good luminance. More specifically, display with higher luminance can be performed as compared with an organic EL display device using a circularly polarizing plate. If the average transmittance is equal to or lower than the above upper limit value, the intensity of reflected light can be attenuated to such an extent that display defects due to external light reflection can be suppressed.
The average transmittance may be 50% or more, and more preferably 60% or more. The average transmittance may be 98% or less, more preferably 90% or less, and still more preferably 80% or less.
This is because, by setting the average transmittance to the above-described condition, it is possible to more suitably suppress display defects due to external light reflection.
The average transmittance of the white part is a value obtained by averaging the transmission spectrum of the white part over the entire visible light range (380 nm to 780 nm). Moreover, the average transmittance of the white part can be obtained by a general measurement method, and can be obtained, for example, by measuring using a microspectroscope OSP-SP2000 (manufactured by OLYMPUS).

Moreover, in this invention, the transmission spectrum of a white part has a minimum value in the wavelength range of 500 nm-650 nm. Since the transmission spectrum of the white part has a minimum value in the above-described wavelength range, the intensity of the green light contained in the reflected light can be made lower, so that the reflected light is not easily recognized by the observer. be able to. Thereby, a favorable white display can be performed in the white subpixel of the organic EL display device using the color filter of the present invention.
The wavelength range having the minimum value is preferably a wavelength range of 550 nm to 650 nm, and more preferably a wavelength range of 550 nm to 620 nm.
By having the minimum value in the wavelength range described above, the intensity of the green light contained in the reflected light can be further attenuated, and the reflected light can be made more difficult to be recognized by the observer.

Further, the transmission spectrum of the white part is not particularly limited as long as it has a minimum value in the above-described wavelength region, but it is preferable that the wavelength region other than the above-described wavelength region is flat. By attenuating light of colors other than green light included in the reflected light to the same extent, it is possible to make the reflected light less colored and less likely to be recognized by the observer. Become.
Specifically, the difference between the average transmittance in the wavelength range of 380 nm to 500 nm and the average transmittance in the wavelength range of 650 nm to 780 nm of the white part is within a range of ± 30%, and particularly within a range of ± 25%. In particular, it is preferably within a range of ± 20%. By making the difference in average transmittance of each wavelength region of the white part within the above-described range, the reflected light can be made less colored, and the reflected light is less likely to be recognized by the observer. be able to. Therefore, better white display can be performed in the white subpixel of the organic EL display device using the color filter of the present invention.

In addition, as the white part, when the average transmittance in the wavelength region of 380 nm to 500 nm and 650 nm to 780 nm of the white part is α and the average transmittance in the wavelength region of 500 nm to 650 nm is β, the difference (α -Β) is not particularly limited as long as it can reduce the green light contained in the reflected light, but is preferably 5% or more, more preferably 7% or more, and particularly preferably 10% or more. When the difference between the average transmittance in the wavelength region of 380 nm to 500 nm and 650 nm to 780 nm in the white portion and the average transmittance in the wavelength region of 500 nm to 650 nm is less than the above-described value, the green light contained in the reflected light This is because it may be difficult to sufficiently attenuate the strength.
The difference (α−β) is preferably 30% or less, more preferably 25% or less, and particularly preferably 20% or less. When the difference between the average transmittance in the wavelength range of 380 nm to 500 nm and 650 nm to 780 nm of the white part and the average transmittance in the wavelength range of 500 nm to 650 nm exceeds the above-described value, other than the green light included in the reflected light This is because light may be easily observed.

As a method for adjusting the transmission spectrum or the like of the white part, specifically, a colorant that absorbs light in a wavelength range of 500 nm to 650 nm, more specifically, a resin layer containing a blue colorant is provided in the white part. Adjustments are made accordingly.
As a resin layer containing the said blue coloring material, a light absorption layer is mentioned, for example. Moreover, when the coloring part mentioned later contains the blue coloring part which has a pattern-like blue coloring layer, it is formed in the at least one part of the said white part on the said transparent base material, and is comprised from the same material as the said blue coloring layer. A light adjustment layer is mentioned.

2. Next, the configuration of the color filter of the present invention will be described.
The color filter of this invention has a transparent base material, a colored layer, and a light absorption layer.

(1) Light absorption layer The light absorption layer in this invention is demonstrated.
The light absorption layer in this invention is formed in the said white part on the said transparent base material, and is comprised from resin containing a coloring material. The light absorbing layer is provided to give the above-described transmission characteristics to the white portion of the color filter.

  The light absorbing layer only needs to be formed on one surface of the transparent substrate, may be formed on the same surface as the colored layer described later, and is on the surface opposite to the colored layer side. Usually, it is formed on the same surface as the colored layer.

The formation position of the light absorption layer on the transparent substrate is not particularly limited as long as it is formed at least in the white part. For example, as illustrated in FIGS. 1A and 1B, the light absorption layer 3 may be formed in a pattern on the white portion 10W on the transparent substrate 1, as illustrated in FIG. The light absorption layer 3 may be formed on the entire surface of the transparent substrate 1 including the white portion 10W. As illustrated in FIGS. 1A and 1B, in the present invention, when the light absorption layer 3 is formed in a pattern on the white portion 10W on the transparent substrate 1, the transmission characteristics of the light absorption layer 3 are Since the colored portion 10C is not affected, the characteristics of the white portion 10W can be made more optimal. On the other hand, as illustrated in FIG. 1C, when the light absorption layer 3 is formed on the entire surface of the transparent substrate 1 including the white portion 10W, the intensity of the reflected light that causes the above-described reflection unevenness is increased. Since it can attenuate more, the said reflection nonuniformity can be suppressed more suitably.
In the present invention, from the viewpoint of imparting desired transmission characteristics to the white portion, the light absorption layer is preferably formed in a pattern on the white portion on the transparent substrate.

  When the light absorption layer is formed in a pattern, the pattern shape of the light absorption layer is appropriately determined according to the pattern shape of the white portion. The pattern shape of the white part is appropriately determined depending on the pattern arrangement of the pixel part used in the organic EL display device. The pattern arrangement of the pixel portion can be the same as that used in a general organic EL display device, and specifically includes a stripe arrangement, a mosaic arrangement, a dot arrangement, a pen tile arrangement, and the like. .

The thickness of the light absorption layer is appropriately selected according to the composition of the material of the light absorption layer and is not particularly limited. In this invention, it is preferable to form so that it may have thickness equivalent to the colored layer mentioned later. It is because it becomes easy to form another structure on the colored layer and the light absorption layer of the color filter.
Specifically, the thickness of the light absorption layer is in the range of 0.1 μm to 10.0 μm, in particular, in the range of 0.5 μm to 7.0 μm, particularly in the range of 1.0 μm to 5.0 μm. Preferably there is.

A light absorption layer is comprised from resin containing a coloring material.
The resin is not particularly limited as long as it can form a light absorbing layer capable of dispersing a colorant and imparting desired white transmittance and transmission characteristics such as a transmission spectrum to the white portion. However, a light-transmitting photosensitive resin can be preferably used.

The type of the photosensitive resin having translucency is not particularly limited, and any of a negative photosensitive resin and a positive photosensitive resin can be used.
The negative photosensitive resin used is not particularly limited, and a commonly used negative photosensitive resin can be used. For example, a chemically amplified photosensitive resin based on a crosslinked resin, specifically, a chemically amplified photosensitive resin in which a crosslinking agent is added to polyvinylphenol and an acid generator is further added. In addition, as an acrylic negative photosensitive resin, a photopolymerization initiator that generates a radical component upon irradiation with ultraviolet rays, a component that has an acrylic group in the molecule, causes a polymerization reaction by the generated radical, and cures thereafter, What contains the functional group (for example, the component which has an acidic group in the case of image development by an alkaline solution) which can melt | dissolve an unexposed part by image development can be used. Among the above-mentioned components having an acrylic group, examples of relatively low molecular weight polyfunctional acrylic molecules include dipentaerythritol hexaacrylate (DPHA), dipentaerythritol pentaacrylate (DPPA), and tetramethylpentatriacrylate (TMPTA). Can be mentioned. Examples of the high molecular weight polyfunctional acrylic molecule include a polymer in which an acrylic group is introduced via an epoxy group into a part of the carboxylic acid group of the styrene-acrylic acid-benzyl methacrylate copolymer, and methyl methacrylate-styrene- An acrylic acid copolymer etc. are mentioned.
Moreover, the positive photosensitive resin used is not particularly limited, and a commonly used positive photosensitive resin can be used. Specifically, a chemically amplified photosensitive resin using a novolac resin as a base resin can be used.

Next, the coloring material will be described.
In this invention, the average transmittance | permeability of a white part is adjusted by making a light absorption layer contain a coloring material. Moreover, in this invention, it is preferable to adjust so that the transmission spectrum of a white part may have the minimum value in the range of 500 nm-650 nm by making a light absorption layer contain a coloring material.
In the present invention, one colorant may be used, and two or more colorants may be used.
Examples of such a colorant include a blue colorant, a purple colorant, and a red colorant.

The blue colorant is preferably blue phthalocyanine, for example. Examples of the blue phthalocyanine include C.I. I. Pigment Blue (hereinafter sometimes referred to as PB) 15: 1, PB15: 2, PB15: 3, PB15: 4, PB15: 6. In the present invention, two kinds of blue phthalocyanines may be used as the blue coloring material.
Examples of the purple colorant include C.I. I. CI pigment violet (hereinafter sometimes referred to as PV) 19, PV23, PV29, PV32 and the like.
Moreover, as a red coloring material, C.I. I. Pigment red (hereinafter sometimes referred to as PR) 177, PR254, PR122, and PR209.

  In this invention, you may have coloring materials other than the blue coloring material mentioned above, a purple coloring material, and a red coloring material. Examples of such a coloring material include a black coloring material.

  The content of the colorant is appropriately selected according to the spectrum of transmitted light and reflected light of the light absorption layer, reflected light, average transmittance, thickness, and the like. In the range of 0.1 to 10.0 parts by mass, in particular in the range of 0.5 to 7.0 parts by mass, particularly 1.0 to 5.0 parts by mass with respect to 100 parts by mass. It is preferably within the range of parts. This is because when the content of the coloring material is less than the above range or exceeds the above range, it may be difficult to adjust the transmission characteristics of the white portion using the light absorption layer. In addition, content of a coloring material means the total content, when two or more coloring materials are added.

  In the present invention, as illustrated in FIG. 1B, when the colored portion 10C includes the blue colored portion 10B having the blue colored layer 2B, the light absorbing layer 3 is formed using the same material as the blue colored layer 2B. It may be formed. In this case, the light absorption layer 3 is formed with a thickness smaller than that of the blue coloring layer 2B so that the average transmittance is within the above-described range.

  The method for forming the light absorbing layer is not particularly limited as long as the light absorbing layer can be formed at least on the white portion on the base material, and a known method can be used as a general method for forming the resin layer. Explanation here is omitted.

(2) Colored layer The colored layer in this invention is formed in the pattern form in the colored part on a transparent base material.
The pattern shape of the colored layer is appropriately determined according to the pattern shape of the colored portion. Further, the pattern shape of the colored portion is appropriately determined depending on the pattern arrangement of the pixel portion used in the organic EL display device. Since the pattern arrangement of the pixel portion has been described in the section “(1) Light Absorbing Layer”, description thereof is omitted here.

  The colored layer is a layer that selectively transmits only light in a specific wavelength range. In the present invention, usually, a red colored layer that selectively transmits light in the red wavelength range, a green colored layer that selectively transmits light in the green wavelength range, and a blue wavelength range as the colored layer. A blue colored layer that selectively transmits light. In addition, the colored layers of a plurality of colors are not limited to the above-described red colored layer, green colored layer, and blue colored layer, and other colored layers such as a yellow colored layer may be included.

The colored layer is formed by dispersing or dissolving a colorant such as a pigment or dye of each color in a photosensitive resin.
The photosensitive resin can be the same as that described in the above-mentioned section “(1) Light absorption layer”, and thus description thereof is omitted here.

Among these, examples of the colorant used in the red colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. These pigments may be used alone or in combination of two or more.
Examples of the colorant used in the green coloring layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindolinone pigments. And pigments. These pigments or dyes may be used alone or in combination of two or more.
Examples of the colorant used in the blue colored layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments and the like. These pigments may be used alone or in combination of two or more.

  The content of the colorant is not particularly limited as long as a desired color display can be performed.

  About the thickness of the said colored layer, it can select suitably according to the use of a color filter. Specifically, since it can be made equal to the thickness of the light absorption layer described above, description thereof is omitted here.

(3) Transparent base material The transparent base material in this invention supports the colored layer mentioned above and a light transmissive layer.

  The transparency of the transparent substrate is not particularly limited as long as the color filter of the present invention is used in an organic EL display device so long as light can be transmitted through the organic EL layer. However, the transmittance in the visible light region is preferably 80% or more, and more preferably 90% or more. Here, the transmittance | permeability of a transparent base material can be measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).

  Examples of the transparent substrate include inflexible rigid materials such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, or flexible materials such as resin films and optical resin plates. Can be used. Moreover, you may use what formed the barrier layer in the resin film.

  About the thickness of a transparent base material, it can determine suitably according to the use etc. of the color filter of this invention, and the material which comprises a transparent base material.

(4) Other Configurations The color filter of the present invention is not particularly limited as long as it has the above-described transparent substrate, colored layer, and light absorption layer, and other necessary configurations are appropriately selected and added. Can do. Examples of such a configuration include a light adjustment layer, a light shielding part, a protective layer, a TFT, and an electrode.

(A) Light Adjustment Layer First, the light adjustment layer in the present invention will be described.
The light adjusting layer is formed on at least a part of the white portion on the transparent substrate when the colored portion includes a blue colored portion having a patterned blue colored layer, and is the same as the blue colored layer It is composed of materials.
As illustrated in FIGS. 2A and 2B, the light adjustment layer 4 in the present invention includes a transparent base material 1 when the colored portion 10 </ b> C includes a blue colored portion 10 </ b> B having a patterned blue colored layer 2 </ b> B. It is formed in at least a part of the upper white portion 10W and is made of the same material as the blue colored layer 2B. When it has the said light absorption layer, the light absorption layer and the light adjustment layer can be used together, and the average transmittance | permeability of a white part and the transmission spectrum of a white part can be adjusted to a desired value.

As illustrated in FIG. 2A, the light adjusting layer 4 may be formed directly on a part of the white portion 10 </ b> W on the transparent substrate 1 in a pattern, as illustrated in FIG. As illustrated in b), it may be formed by laminating on the light absorption layer 3. In this case, the light adjustment layer 4 is formed with a thinner thickness than the blue colored layer 2B.
In the present invention, the light absorption layer is preferably formed continuously with the blue colored layer. This is because the light absorption layer can be formed by a simple method.

  About the pattern shape of a light absorption layer, thickness, etc., it selects suitably according to the use etc. of a color filter.

(B) Light-shielding part Next, the light-shielding part in this invention is demonstrated.
The light shielding part in the present invention is formed in a pattern on a transparent substrate.
Moreover, the said light-shielding part demarcates each coloring part and white part.

  The pattern arrangement of the openings of the light shielding part is appropriately selected depending on the pattern arrangement of the pixel part of the organic EL display device.

Examples of the light shielding part include those composed of a metal material such as chromium, those obtained by dispersing a light shielding material in a resin layer, and those obtained by laminating a plurality of layers made of the same material as the colored layer. Can do.
About the material used for these light-shielding parts, thickness, its formation method, etc., since a well-known thing can be used, description here is abbreviate | omitted.

(C) Protective layer Next, the protective layer in this invention is demonstrated. In the color filter, the protective layer in the present invention is formed so as to cover the colored layer and the light absorbing layer. The color filter of the present invention is particularly preferably used when used in a bottom emission type organic EL display device.

  Moreover, the said protective layer will not be specifically limited if the color characteristic of a color filter, the transmission characteristic mentioned above, etc. are not impaired, A general transparent resin can be used. In particular, the photocurable protective film is preferable because it can be patterned for each chip (colored portion and white portion) (a plurality of color filter patterns formed on a transparent substrate). In addition, if the protective layer can be patterned for each color filter pattern, it is possible to eliminate process defects during cutting and panel bonding.

  About the thickness of a protective layer, and a manufacturing method, since it can be made to be the same as that of what is used for a general color filter, description here is abbreviate | omitted.

(D) TFT
Next, the TFT will be described. When the color filter of the present invention is used in a bottom emission type organic EL display device, a TFT may be formed on a transparent substrate. Since the TFT can be the same as that used in a general organic EL display device, description thereof is omitted here.

(E) Electrode Next, the electrode will be described.
In the present invention, a metal electrode layer made of Cu, Ag, Cr, Au, Ta, Mo, Pt, MAM, APC, or the like may be provided on the color filter. Further, a transparent electrode made of ITO, IZO, or the like may be provided.
The metal electrode layer can be suitably provided in a region (non-display region) that is not used for display in the color filter on the light shielding portion or the like.
By providing an electrode on the color filter of the present invention, when used in an organic EL display device, a reduction in luminance due to an applied voltage effect to the organic EL element can be reduced, and the power consumption of the organic EL display device is reduced. Can be achieved.

3. Next, a method for producing a color filter of the present invention will be described.
The method for producing the color filter of the present invention is not particularly limited, and can be the same as the method for producing a general color filter.

FIG. 6 is a schematic cross-sectional view showing an example of a method for producing a color filter of the present invention. FIG. 6 shows an example of manufacturing a color filter by using a photolithography method.
As illustrated in FIG. 6A, first, the light shielding portion 5 is formed in a pattern on the transparent substrate 1. Next, as illustrated in FIG. 6B, a light absorbing layer forming coating solution containing a colorant and a resin is applied onto the transparent substrate 1 to form a light absorbing layer forming layer 3 ′. . Subsequently, as illustrated in FIG. 6C, the light absorbing layer forming layer 3 ′ is irradiated with the exposure light Le using a photomask 60 or the like to be subjected to pattern exposure and development processing. As illustrated in (d), the light absorption layer 3 is formed in a pattern on the white portion 10 </ b> W on the transparent substrate 1.
Next, although not shown, a colored layer forming coating solution containing a coloring material and a resin is applied onto a transparent substrate to form a colored layer forming layer, and the colored layer forming layer is subjected to pattern exposure. Development processing is performed to form colored layers 2R, 2G, and 2B in a pattern on the colored portion 10C on the transparent substrate 1 as illustrated in FIG. 6 (e).
By performing such a process, the color filter 10 can be manufactured as illustrated in FIG.
Note that reference numerals not described in FIG. 6 can be the same as those in FIG. 1 and the like, and thus description thereof is omitted here.

  Solvents, additives, etc. used in each of the above coating liquids, adjustment methods for the above coating liquids, and coating methods, exposure conditions, development processing conditions, etc. of the above coating liquids for color filters by general photolithography methods. Since it can be the same as that used for the manufacturing method, description here is abbreviate | omitted.

  In addition, although the method for manufacturing a color filter using a photolithography method has been described with reference to FIG. 6, the color filter of the present invention can also be manufactured using, for example, an inkjet method, a printing method, or the like.

4). Application The color filter of the present invention is used in an organic EL display device. Further, among the organic EL display devices described above, the organic EL display device can be suitably used for an organic EL display device used for a portable device.

5. Color filter As described above, the color filter of the present invention has a minimum value in the wavelength region of 500 nm to 650 nm in the transmission spectrum of the white portion, and thus is excellent in a white subpixel when used in an organic EL display device. Although white display can be performed, for example, it is conceivable that a color filter having the following characteristics can also exhibit the same function and effect.
Specifically, a transparent substrate, a colored portion provided on the transparent substrate and having a patterned colored layer, and a patterned white portion provided on the transparent substrate, The white portion on the transparent substrate is formed with a light absorption layer composed of a resin containing a colorant, and the average transmittance of the white portion is in the range of 50% to 98%. The difference between the average transmittance in the wavelength range of 380 nm to 500 nm and 650 nm to 780 nm and the average transmittance in the wavelength range of 500 nm to 650 nm is the range described in the section of “1. Color filter characteristics” described above. It is a color filter characterized by being.
Further, the more preferable white portion transmission characteristics in such a color filter, the configuration of the color filter, the method of manufacturing the color filter, the use, and the like can be the same as those described above. Is omitted.

B. Organic EL Display Device Next, the organic EL display device of the present invention will be described.
The organic EL display device of the present invention is characterized by having the color filter described in the above-mentioned section “A. Color filter”. Moreover, the organic EL display device of the present invention has two aspects due to the difference in structure. Specifically, the structure of the organic EL display device has two modes, a mode (first mode) in which the structure is a top emission type and a mode (second mode) in which the structure is a bottom emission type.
Hereinafter, each aspect will be described.

1. First Aspect The organic EL display device of this aspect is a top emission type organic EL display device.
Specifically, the organic EL display device of this embodiment includes a transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white color provided on the transparent base material. A light absorption layer composed of a resin containing a colorant is formed on the white part on the transparent substrate, and the average transmittance of the white part is 50% to 98%. A color filter having a minimum value in a wavelength range of 500 nm to 650 nm, a transmission spectrum of the white part, a counter substrate, and an organic EL layer formed on the counter substrate and including a light emitting layer. An organic EL element, and the organic EL element is disposed between the color filter and the counter substrate.

  As a schematic cross-sectional view showing an example of the organic EL display device of this embodiment, the above-described FIG. 3 can be mentioned. Since FIG. 3 has been described in the item “A. Color filter” described above, description thereof is omitted here.

According to this aspect, by having the above-described color filter, it is possible to perform display with good luminance while suppressing display defects due to reflection of external light, and it is possible to perform good white display in the white subpixel. An organic EL display device can be obtained.
Hereinafter, the details of the organic EL display device of this embodiment will be described.

(1) Color filter Since the color filter in this aspect can be the same as that described in the section “A. Color filter” described above, description thereof is omitted here.

(2) Opposing base material Next, the opposing base material in this embodiment will be described.
An organic EL element to be described later is formed on the counter substrate in this embodiment.

  Since the organic EL display device of this embodiment uses the color filter side as the light emitting surface, the opposing substrate may be transparent or may not be transparent.

  Examples of the opposing substrate include inflexible rigid materials such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, or flexible materials such as resin films and optical resin plates. Can be used. Moreover, you may use what formed the barrier layer in the resin film.

Since the organic EL display device of this embodiment is a top emission type organic EL display device, a TFT may be formed on the counter substrate.
As the TFT, those generally used in organic EL display devices can be used.

(3) Organic EL element The organic EL element used for this aspect is formed on the said opposing base material, and has an organic EL layer containing a light emitting layer. The organic EL element is usually formed on the first electrode layer formed on the counter substrate, the organic EL layer formed on the first electrode layer, including the light emitting layer, and the organic EL layer. A second electrode layer and, if necessary, an insulating layer and a partition. Hereinafter, each configuration of the organic EL element will be described.

(A) Organic EL layer The organic EL layer has one or more organic layers including at least a light emitting layer.
Examples of the layer constituting the organic EL layer include a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer in addition to the light emitting layer.
Hereinafter, the details of the organic EL layer used in this embodiment will be described.

(I) Light emitting layer As the light emitting layer used in this embodiment, a light emitting layer corresponding to at least a white pixel portion emits white light. Specifically, it may be a white light-emitting layer that emits white light, or may be a light-emitting layer that is composed of a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer that emit three primary colors, respectively, and that emits white light.
In addition, the light emitting layer corresponding to the colored subpixel may emit white light as described above, or may be a light emitting layer that emits light of a color corresponding to the color of each colored subpixel.
About the kind of light emitting layer, it can select suitably according to the use etc. of an organic electroluminescence display.

  The light emitting material used for the light emitting layer may be any material that emits fluorescence or phosphorescence, and examples thereof include dye materials, metal complex materials, and polymer materials.

  Examples of dye-based materials include cyclopentadiene derivatives, tetraphenylbutadiene derivatives, triphenylamine derivatives, oxadiazole derivatives, pyrazoloquinoline derivatives, distyrylbenzene derivatives, distyrylarylene derivatives, silole derivatives, thiophene ring compounds, pyridine Examples thereof include a ring compound, a perinone derivative, a perylene derivative, an oligothiophene derivative, a coumarin derivative, an oxadiazole dimer, and a pyrazoline dimer.

  Examples of the metal complex material include an aluminum quinolinol complex, a benzoquinolinol beryllium complex, a benzoxazole zinc complex, a benzothiazole zinc complex, an azomethyl zinc complex, a porphyrin zinc complex, a europium complex, or a central metal such as Al, Zn, Be, etc. Alternatively, a metal complex having a rare earth metal such as Tb, Eu, or Dy and having a oxadiazole, thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline structure, or the like as a ligand can be given. Specifically, tris (8-quinolinolato) aluminum complex (Alq3) can be used.

  Examples of the polymer material include polyparaphenylene vinylene derivatives, polythiophene derivatives, polyparaphenylene derivatives, polysilane derivatives, polyacetylene derivatives, polyvinylcarbazole, polyfluorenone derivatives, polyfluorene derivatives, polyquinoxaline derivatives, polydialkylfluorene derivatives, and Examples thereof include copolymers thereof. Moreover, what polymerized said pigment-type material and metal complex-type material as a polymeric material can also be used.

  As the phosphorescent material, for example, an iridium complex, a platinum complex, or a metal complex having a heavy metal having a large spin-orbit interaction such as Ru, Rh, Pd, Os, Ir, Pt, or Au as a central metal is used. Can do. Specific examples include iridium complexes having platinum pyridine, thienyl pyridine and the like as ligands, platinum porphyrin derivatives, and the like.

  These luminescent materials may be used alone or in combination of two or more.

  Further, a dopant that emits fluorescence or phosphorescence may be added to the light emitting material for the purpose of improving the light emission efficiency and changing the light emission wavelength. Examples of such dopants include perylene derivatives, coumarin derivatives, rubrene derivatives, quinacridone derivatives, squalium derivatives, porphyrin derivatives, styryl dyes, tetracene derivatives, pyrazoline derivatives, decacyclene, phenoxazone, quinoxaline derivatives, carbazole derivatives, and fluorene derivatives. Can be mentioned.

  The thickness of the light-emitting layer is not particularly limited as long as it can provide a function of emitting light by providing a recombination field of electrons and holes, and may be, for example, about 10 nm to 500 nm. it can.

  The method for forming the light emitting layer may be a wet process in which a light emitting layer forming coating solution in which the above light emitting material or the like is dissolved or dispersed in a solvent may be applied, or may be a dry process such as a vacuum deposition method. Good. Among these, a wet process is preferable from the viewpoint of efficiency and cost.

  Examples of the application method of the light emitting layer forming coating liquid include an inkjet method, a spin coating method, a casting method, a dipping method, a bar coating method, a blade coating method, a roll coating method, a spray coating method, a gravure printing method, and screen printing. Method, flexographic printing method, offset printing method and the like.

(Ii) Hole Injecting and Transporting Layer In this embodiment, a hole injecting and transporting layer may be formed between the light emitting layer and the anode.
The hole injection transport layer may be a hole injection layer having a hole injection function, or a hole transport layer having a hole transport function, and the hole injection layer and the hole transport layer are laminated. And may have both a hole injection function and a hole transport function.

  The material used for the hole injecting and transporting layer is not particularly limited as long as it is a material that can stabilize injection and transportation of holes to the light emitting layer, and is exemplified in the light emitting material of the light emitting layer. In addition to compounds, phenylamine, starburst amine, phthalocyanine, vanadium oxide, molybdenum oxide, ruthenium oxide, aluminum oxide, titanium oxide and other oxides, amorphous carbon, polyaniline, polythiophene, polyphenylene vinylene and their derivatives The conductive polymer can be used. Specifically, bis (N- (1-naphthyl) -N-phenyl) benzidine (α-NPD), 4,4,4-tris (3-methylphenylphenylamino) triphenylamine (MTDATA), poly-3 , 4 ethylenedioxythiophene-polystyrene sulfonic acid (PEDOT-PSS), polyvinylcarbazole and the like.

  The thickness of the hole injecting and transporting layer is not particularly limited as long as the hole injecting function and the hole transporting function are sufficiently exhibited. Specifically, the thickness is in the range of 0.5 nm to 1000 nm, particularly 10 nm to It is preferable to be in the range of 500 nm.

  The formation method of the hole injection transport layer may be a wet process in which a coating liquid for forming a hole injection transport layer in which the above-described materials or the like are dissolved or dispersed in a solvent may be applied. It may be a process and is appropriately selected according to the type of material.

(Iii) Electron Injection / Transport Layer In this embodiment, an electron injection / transport layer may be formed between the light emitting layer and the cathode.
The electron injection / transport layer may be an electron injection layer having an electron injection function, may be an electron transport layer having an electron transport function, or may be a laminate of an electron injection layer and an electron transport layer. It may have both an electron injection function and an electron transport function.

  The material used for the electron injection layer is not particularly limited as long as it can stabilize the injection of electrons into the light emitting layer. In addition to the compounds exemplified as the light emitting material for the light emitting layer, aluminum may be used. Alkali metals such as lithium alloys, strontium, calcium, lithium, cesium, lithium fluoride, magnesium fluoride, strontium fluoride, calcium fluoride, barium fluoride, cesium fluoride, magnesium oxide, strontium oxide, sodium polystyrene sulfonate, and Alkaline earth metal metals, alloys, compounds, organic complexes, and the like can be used.

  Alternatively, a metal doped layer in which an alkali metal or an alkaline earth metal is doped on an electron transporting organic material may be formed, and this may be used as an electron injection layer. Examples of the electron-transporting organic material include bathocuproine, bathophenanthroline, and phenanthroline derivatives. Examples of the metal to be doped include Li, Cs, Ba, and Sr.

  The material used for the electron transport layer is not particularly limited as long as it can transport electrons injected from the cathode to the light emitting layer. For example, bathocuproin, bathophenanthroline, phenanthroline derivative, triazole derivative Oxadiazole derivatives, tris (8-quinolinolato) aluminum complex (Alq3) derivatives, and the like.

  The thickness of the electron injection / transport layer is not particularly limited as long as the electron injection function and the electron transport function are sufficiently exhibited.

  The method for forming the electron injecting and transporting layer may be a wet process in which a coating liquid for forming an electron injecting and transporting layer in which the above-described materials or the like are dissolved or dispersed in a solvent may be applied. There may be, and it chooses suitably according to the kind etc. of material.

(B) 1st electrode layer and 2nd electrode layer The 1st electrode layer used for this mode is formed on a counter substrate. Further, the first electrode layer may be formed uniformly on the counter substrate or may be formed in a pattern, and is appropriately selected according to the use and driving method of the organic EL display device of this aspect. The
In this embodiment, a back electrode layer described later is used as the first electrode layer.
On the other hand, the 2nd electrode layer used for this mode is formed on the organic EL layer mentioned above. Further, as the second electrode layer, a transparent electrode layer is usually used because it is disposed on the color filter side in the organic EL display device.
Hereinafter, the transparent electrode layer and the back electrode layer used in this embodiment will be described.

(I) Transparent electrode layer The transparent electrode layer used in this embodiment may be either an anode or a cathode.

The anode preferably has a low resistance, and a metal material that is a conductive material is generally used, but an organic compound or an inorganic compound may be used.
For the anode, a conductive material having a large work function is preferably used so that holes can be easily injected. For example, metals such as Au, Ta, W, Pt, Ni, Pd, Cr, Cu, Mo, alkali metals, alkaline earth metals; oxides of these metals; Al alloys such as AlLi, AlCa, AlMg, MgAg, etc. Mg alloys, Ni alloys, Cr alloys, alkali metal alloys, alkaline earth metal alloys, etc .; inorganic oxides such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide, indium oxide; Examples thereof include conductive polymers such as metal-doped polythiophene, polyaniline, polyacetylene, polyalkylthiophene derivatives, and polysilane derivatives; α-Si, α-SiC; and the like. These conductive materials may be used alone or in combination of two or more. When two or more types are used, layers made of each material may be stacked.

The cathode preferably has a low resistance, and a metal material that is a conductive material is generally used, but an organic compound or an inorganic compound may be used.
For the cathode, it is preferable to use a conductive material having a low work function so that electrons can be easily injected. Examples thereof include magnesium alloys such as MgAg, aluminum alloys such as AlLi, AlCa, and AlMg, and alloys of alkali metals and alkaline earth metals such as Li, Cs, Ba, Sr, and Ca.

  As a method for forming the transparent electrode layer, a general electrode forming method can be used, for example, a PVD method such as a vacuum deposition method, a sputtering method, an EB deposition method, an ion plating method, or a CVD method. be able to.

(Ii) Back electrode layer As the back electrode layer in this embodiment, a reflective electrode layer is used, and a metal electrode layer is usually used.

The back electrode layer may be either an anode or a cathode.
The materials for the anode and the cathode are described in the section of the transparent electrode layer, and the method for forming the back electrode layer is the same as the method for forming the transparent electrode layer, and thus the description thereof is omitted here.

(C) Insulating layer In the organic EL element used in this embodiment, an insulating layer may be formed in a pattern on the first electrode layer (on the back electrode layer). The insulating layer is formed so as to define a pixel. The pattern of the insulating layer is appropriately selected according to the arrangement of the pixels and can be, for example, a lattice shape.
Moreover, in this aspect, when the 1st electrode layer (back electrode layer) is formed in pattern shape on the opposing base material, the insulating layer is formed in the opening part of the 1st electrode layer (back electrode layer). Also good. The insulating layer is provided to prevent direct contact between the first electrode layer (back electrode layer) and the second electrode layer (transparent electrode layer).
As a material of the insulating layer, a material of a general insulating layer in an organic EL element can be used. For example, a photo-curable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, an inorganic material, or the like. Can be mentioned.
The thickness of the insulating layer is not particularly limited as long as pixels can be defined and the transparent electrode layer and the back electrode layer can be insulated.
As a method for forming the insulating layer, a general method for forming an insulating layer in an organic EL element can be applied, and examples thereof include a photolithography method.

(D) Partition Wall In the organic EL element used in this embodiment, the partition wall may be formed in a pattern on the insulating layer. The partition walls are formed so as to define a pattern of the transparent electrode layer.
When the partition walls are formed, the transparent electrode layer can be formed in a pattern without using a metal mask or the like.
The partition pattern is appropriately selected according to the pattern of the transparent electrode layer.
As a material for the partition, a general partition material in an organic EL element can be used. For example, a photo-curable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, an inorganic material, or the like. Can be mentioned.
Further, when the light emitting layer is formed in a pattern, the partition may be subjected to a surface treatment that changes the surface energy in advance.
The height of the partition wall is not particularly limited as long as the pattern of the transparent electrode layer can be defined and the adjacent transparent electrode layers can be insulated from each other.
As a method for forming the partition, a general method for forming a partition in an organic EL element can be applied, and examples thereof include a photolithography method.

(4) Other Configurations The organic EL display device of this aspect is not particularly limited as long as it has the above-described color filter, counter substrate, and organic EL element.

In this aspect, a sealing material is usually disposed between the color filter and the counter substrate, and on the outer periphery of the color filter and the counter substrate. The sealing material is provided for adhering the color filter and the counter substrate and sealing the organic EL element.
As a material used for the sealing material, any material can be used as long as it can adhere the color filter and the opposing base material and can prevent the organic EL element from coming into contact with moisture in the atmosphere. What is used for can be used.

  Moreover, when the organic EL display device of this aspect has a sealing material, the space between the color filter and the opposing base material of the organic EL display device of this aspect may be filled with an inert gas. The inert gas is not particularly limited as long as it is a general one used for organic EL elements, and examples thereof include nitrogen gas, helium gas, and argon gas. Further, the space between the color filter and the counter substrate may be evacuated.

  In addition, the organic EL display device according to this aspect is sealed using, for example, an adhesive layer formed by filling an adhesive between a color filter and a counter substrate instead of the above-described sealing material. May be. Since the adhesive used for the adhesive layer can be the same as that used for a general organic EL display device, description thereof is omitted here.

(5) Organic EL Display Device The organic EL display device of this aspect is particularly preferably used for portable devices.
As a driving method of the organic EL display device of this aspect, either a passive matrix or an active matrix can be applied.

  Since the manufacturing method of the organic EL display device of this aspect can be the same as the manufacturing method of a general organic EL display device, description thereof is omitted here.

2. Second Aspect The organic EL display device of this aspect is a bottom emission type organic EL display device.
Specifically, the organic EL display device of this embodiment includes a transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white color provided on the transparent base material. A light absorption layer composed of a resin containing a colorant is formed on the white part on the transparent substrate, and the average transmittance of the white part is 50% to 98%. An organic EL having a color filter having a minimum value in a wavelength range of 500 nm to 650 nm and a transmission spectrum of the white portion within the range, and an organic EL layer including a light emitting layer formed on the colored layer of the color filter And an element.

  As a schematic cross-sectional view showing an example of the organic EL display device of this embodiment, the above-described FIG. 4 can be cited. Since FIG. 4 has been described in the item “A. Color filter” described above, description thereof is omitted here.

  According to this aspect, by having the above-described color filter, it is possible to perform display with good luminance while suppressing display defects due to reflection of external light, and it is possible to perform good white display in the white subpixel. An organic EL display device can be obtained.

  Hereinafter, the details of the organic EL display device of this embodiment will be described.

(1) Color filter Since the color filter used in this embodiment can be the same as that described in the section “A. Color filter” described above, description thereof is omitted here. Moreover, in this aspect, since the organic EL element mentioned later is formed on the colored layer of a color filter, it is preferable to have a protective layer formed on the colored layer.

(2) Organic EL element The organic EL element used for this aspect is formed on the colored layer of the said color filter, and has an organic EL layer containing a light emitting layer. The organic EL element is usually formed on the first electrode layer formed on the colored layer of the color filter, the organic EL layer formed on the first electrode layer, including the light emitting layer, and the organic EL layer. A second electrode layer, and an insulating layer, a partition wall, and the like as necessary.
In this embodiment, the organic EL element may be directly formed on the colored layer, and may be formed through another layer such as a protective layer formed on the colored layer.

In the organic EL element used in this embodiment, the above-described transparent electrode layer is usually used as the first electrode layer, and the above-described back electrode layer is used as the second electrode layer.
About an organic EL element, since it can be the same as that of what was demonstrated by the term of the above-mentioned "1. 1st aspect" except for said point, description here is abbreviate | omitted.

(3) Others The organic EL display device of this aspect is not particularly limited as long as it has the above-described color filter and organic EL element. In this embodiment, the organic EL display device may have a counter substrate as necessary. When it has a counter substrate in this aspect, the counter substrate is used as a sealing substrate, and is disposed so as to face the colored layer of the color filter and the surface of the organic EL element. In addition, the above-described sealing material or adhesive layer is disposed between the color filter and the counter substrate. The counter base material, the sealing material, and the adhesive layer can be the same as those described in the section “1. First aspect” described above, and thus the description thereof is omitted here.

  The organic EL display device according to this aspect can be the same as the contents described in the section “1. First aspect” except for the points described above.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. Are included in the technical scope.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

[Example 1]
(Preparation of curable resin composition A)
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour.
Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition A>
-Copolymer resin solution (solid content 50%) ... 16 parts by mass-Dipentaerythritol pentaacrylate (Sartomer SR399)
... 24 parts by mass · Ortho-cresol novolac type epoxy resin (Epico Shell Epoxy Epicoat 180S70) · 4 parts by mass · 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
... 4 parts by mass, diethylene glycol dimethyl ether ... 52 parts by mass

(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
Black pigment (Mitsubishi Chemical Corporation # 2600) 20 parts by mass Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 111)
... 16 parts by mass, solvent (diethylene glycol dimethyl ether) ... 64 parts by mass

Next, the following components were sufficiently mixed to obtain a light shielding part composition.
<Composition of composition for light shielding part>
-Black pigment dispersion liquid: 50 parts by mass-Curable resin composition A: 20 parts by mass-Diethylene glycol dimethyl ether: 30 parts by mass

The light shielding part composition was applied with a spin coater and dried at 100 ° C. for 3 minutes to form a light shielding part forming layer.
The light-shielding part forming layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution, and then the substrate is left to stand in an atmosphere at 230 ° C. for 30 minutes for heat treatment. To form a light shielding part.

(Formation of red colored layer)
A red curable resin composition having the following composition was applied by spin coating so as to have predetermined color coordinates, and then dried in an oven at 70 ° C. for 3 minutes.
Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and ultraviolet rays are applied only to the region corresponding to the colored layer formation region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Irradiated for 10 seconds.
Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of a red curable resin composition was removed.
Thereafter, the substrate is allowed to stand in an atmosphere of 170 ° C. for 15 minutes, so that the heat treatment is performed to form a pattern (hereinafter referred to as a red colored layer) on the entire frame portion forming region serving as the red pixel in the display region and the non-display region. , Also called a relief pattern).

<Composition of red curable resin composition>
・ C. I. Pigment Red 177 3 parts by mass / C.I. I. Pigment Red 254 4 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, curable resin composition A 23 parts by mass, 3-methoxybutyl acetate 67 parts by mass

(Formation of green colored layer)
Next, in the same process as the formation of the red relief pattern, a green curable resin composition having the following composition is applied on the side on which the red relief pattern is formed so as to have a predetermined color coordinate for display. A pattern (also referred to as a relief pattern) made of a green colored layer was formed on the green pixel in the region.

<Composition of green curable resin composition>
・ C. I. Pigment Green 58: 7 parts by mass / C.I. I. Pigment Yellow 138 1 part by mass, polysulfonic acid type polymer dispersant 3 parts by mass, the curable resin composition A 22 parts by mass, 3-methoxybutyl acetate 67 parts by mass

(Formation of blue colored layer)
Further, in the same process as the formation of the red relief pattern, a blue curable resin composition having the following composition is applied on the side on which the green relief pattern is formed so as to have predetermined color coordinates. A pattern composed of a blue colored layer (also referred to as a relief pattern) was formed on each blue pixel.

<Composition of blue curable resin composition>
・ C. I. Pigment Blue 1 ... 5 parts by mass, polysulfonic acid type polymer dispersant ... 3 parts by mass, the curable resin composition A ... 25 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

(Formation of light absorption layer)
Further, in the same process as the formation of the red relief pattern, a resin composition for a light absorption layer having the following composition is applied on the side on which the blue relief pattern is formed so as to have predetermined transmission characteristics, and for display. A pattern (also referred to as a relief pattern) made of a light absorption layer was formed in the white portion of the region.
<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 15: 6 1.5 parts by mass. I. Pigment Violet 23 1.5 parts by weight, polysulfonic acid type polymer dispersant 1 part by weight, the curable resin composition A 29 parts by weight, 3-methoxybutyl acetate 67 parts by weight

  The color filter was obtained by performing the above process.

 An optical elastic resin was applied to the obtained color filter and bonded to an OLED light source in a vacuum to obtain a display device.

[Example 2]
A display device was produced in the same manner as in Example 1 except that the following light absorbing layer resin composition was used.
<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 15: 6 1.5 parts by mass, polysulfonic acid type polymer dispersant 0.5 parts by mass, the curable resin composition A 31 parts by mass, 3-methoxybutyl acetate 67 parts by mass

[Example 3]
A display device was produced in the same manner as in Example 1 except that the following light absorbing layer resin composition was used.
<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 15: 6: 2.0 parts by mass / C.I. I. Pigment Violet 23 ... 1.0 part by mass, polysulfonic acid type polymer dispersant ... 0.5 part by mass, the curable resin composition A ... 31 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

[Example 4]
A display device was produced in the same manner as in Example 1 except that the following light absorbing layer resin composition was used.
<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Red 254: 1.5 parts by mass / C.I. I. Pigment Violet 23 1.5 parts by mass, polysulfonic acid type polymer dispersant 0.5 parts by mass, the curable resin composition A 31 parts by mass, 3-methoxybutyl acetate 67 parts by mass

[Comparative example]
A display device was produced in the same manner as in Example 1 except that the following light absorbing layer resin composition was used.
<Composition of the resin composition for light absorption layers>
-Black pigment dispersion liquid-10 parts by mass-Curable resin composition A-40 parts by mass-Diethylene glycol dimethyl ether-50 parts by mass

[Evaluation]
The average transmittance of the white part of the color filters of Examples 1 to 4 and the comparative example, the average transmittance (T1) in the wavelength region of 380 nm to 500 nm, the average transmittance (T2) in the wavelength region of 500 nm to 650 nm, 650 nm to 780 nm And the transmission spectrum of 380 nm to 780 nm, and the transmission spectrum of 380 nm to 780 nm. -It measured using SP2000 (made by OLYMPUS). The results are shown in Tables 1 and 2.
Moreover, the graph of the transmission spectrum of the white part of the color filter of Examples 1-4 and a comparative example is shown in FIG.

  The obtained display device was visually evaluated under a D65 light source. The results are shown in Table 2. The case where the visibility was lowered by the reflected light was evaluated as x, and the case where the visibility was not lowered was evaluated as ◯.

DESCRIPTION OF SYMBOLS 1 ... Transparent base material 2R ... Red colored layer 2G ... Green colored layer 2B ... Blue colored layer 3 ... Light absorption layer 4 ... Light adjustment layer 10 ... Color filter 10C ... Colored part 10R ... Red colored part 10G ... Green colored part 10B ... Blue colored portion 10W ... White portion 20 ... Opposite base material 30 ... Organic EL element 32 ... Organic EL layer 100 ... Organic EL display device

Claims (7)

A transparent substrate;
A colored portion provided on the transparent substrate and having a patterned colored layer;
A pattern-shaped white portion provided on the transparent substrate;
Have
A light absorption layer composed of a resin containing a coloring material is formed on the white portion on the transparent substrate,
The colored portion includes a blue colored portion having a patterned blue colored layer, and at least a part of the white portion on the transparent substrate is made of a material having the same composition as the blue colored layer. A layer is further formed,
The average transmittance of the white part is in the range of 50% to 80%,
A color filter for an organic electroluminescence display device, wherein a transmission spectrum of the white portion has a minimum value in a wavelength region of 500 nm to 650 nm.   A transparent substrate;
  A colored portion provided on the transparent substrate and having a patterned colored layer;
  A pattern-shaped white portion provided on the transparent substrate;
Have
  A light absorption layer composed of a resin containing a coloring material is formed on the white portion on the transparent substrate,
  The colored portion includes a blue colored portion having a patterned blue colored layer, the light absorbing layer is made of a material having the same composition as the blue colored layer, and the thickness of the light absorbing layer is the thickness of the blue colored layer. Thinner than
  The average transmittance of the white part is in the range of 50% to 80%,
  A color filter for an organic electroluminescence display device, wherein a transmission spectrum of the white portion has a minimum value in a wavelength region of 500 nm to 650 nm. Claim 1 or claim 2 the difference between the average transmittance in the wavelength range of the average transmittance and 650nm~780nm the wavelength range of 380nm~500nm of the white portion, characterized in that in the range of ± 30% A color filter for an organic electroluminescence display device according to 1. A transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white portion provided on the transparent base material, and the white color on the transparent base material The part is formed with a light absorption layer made of a resin containing a colorant , and the colored part includes a blue colored part having a pattern-like blue colored layer, and the white part on the transparent substrate At least a part of the light-adjusting layer is formed of a material having the same composition as the blue colored layer, and the average transmittance of the white part is in the range of 50% to 80%. A color filter having a transmission spectrum of the white part having a minimum value in a wavelength region of 500 nm to 650 nm;
An opposing substrate;
An organic electroluminescence device having an organic electroluminescence layer formed on the counter substrate and including a light emitting layer;
Have
The organic electroluminescence display device, wherein the organic electroluminescence element is disposed between the color filter and the counter substrate.   A transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white portion provided on the transparent base material, and the white color on the transparent base material The part is formed with a light absorbing layer made of a resin containing a coloring material, the colored part includes a blue colored part having a patterned blue colored layer, and the light absorbing layer is the blue colored layer. The light absorption layer is thinner than the blue colored layer, the white portion has an average transmittance of 50% to 80%, and the white portion is transparent. A color filter having a minimum value in a wavelength range of 500 nm to 650 nm in the spectrum;
  An opposing substrate;
  An organic electroluminescence device having an organic electroluminescence layer formed on the counter substrate and including a light emitting layer;
Have
  The organic electroluminescence display device, wherein the organic electroluminescence element is disposed between the color filter and the counter substrate. A transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white portion provided on the transparent base material, and the white color on the transparent base material The part is formed with a light absorption layer made of a resin containing a colorant , and the colored part includes a blue colored part having a pattern-like blue colored layer, and the white part on the transparent substrate At least a part of the light-adjusting layer is formed of a material having the same composition as the blue colored layer, and the average transmittance of the white part is in the range of 50% to 80%. A color filter having a transmission spectrum of the white part having a minimum value in a wavelength region of 500 nm to 650 nm;
An organic electroluminescent element having an organic electroluminescent layer formed on the colored layer of the color filter and including a light emitting layer;
An organic electroluminescence display device comprising:   A transparent base material, a colored portion provided on the transparent base material and having a patterned colored layer, and a patterned white portion provided on the transparent base material, and the white color on the transparent base material The part is formed with a light absorbing layer made of a resin containing a coloring material, the colored part includes a blue colored part having a patterned blue colored layer, and the light absorbing layer is the blue colored layer. The light absorption layer is thinner than the blue colored layer, the white portion has an average transmittance of 50% to 80%, and the white portion is transparent. A color filter having a minimum value in a wavelength range of 500 nm to 650 nm in the spectrum;
  An organic electroluminescent element having an organic electroluminescent layer formed on the colored layer of the color filter and including a light emitting layer;
An organic electroluminescence display device comprising:

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