JP2014202959A - Color filter and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter which prevents blue light hazard when used in a display device and enables the display device to display images at a good brightness level, and to provide a display device having the same.SOLUTION: A color filter which clears the above mentioned problem includes; a transparent base material; a pixel unit having blue light transmissive sub-pixels comprising at least either of blue sub-pixels formed on the transparent base material and having blue coloring layers and white sub-pixels formed on the transparent base material; and blue light reduction means provided in the blue light transmissive sub-pixels on the transparent base material to reduce emission intensity of light in a wavelength range of 380-480 nm contained in source light passing through the blue light transmissive sub-pixels.

Description

  The present invention relates to a color filter capable of preventing blue light hazard and performing display with good luminance when used in a display device, and a display device using the same.

  In recent years, display devices such as liquid crystal display devices have been widely used, and are used in, for example, personal computers, televisions, portable information terminals, portable game machines, ATMs, and the like, and have deeply penetrated people's lives. For this reason, the time for people to use the display device has also become longer.

A display device having a light source such as a backlight can display vividly and can be used in a dark place indoors. Conventionally, cold cathode fluorescent lamps (CCFLs) have been used as such light sources, but CCFLs have problems such as the use of mercury harmful to the environment, short life, and high power consumption. Have. In view of this, an increasing number of display devices adopt white LEDs as light sources to replace CCFLs.
As the white LED, for example, a combination of a blue LED and a yellow phosphor, and a combination of a blue LED, a red phosphor and a green phosphor are suitably used.

  In the display device using the above-described white LED, from the viewpoint of improving the light emission efficiency and the viewpoint of consumer's preference, it is considered to use more blue light contained in the white LED. In the color filter used in the apparatus, the blue colored layer and the like are adjusted in order to improve the blue light transmittance in the blue pixel portion.

JP2013-008052A

By the way, recently, when light in a wavelength region of 380 nm to 480 nm (hereinafter sometimes referred to as blue light) included in a display device is observed for a long time, visual acuity reduction, dry eye, stiff shoulders The problem of so-called blue light hazard that causes various health injuries such as insomnia has started to be pointed out (for example, Patent Document 1).
Further, as shown in FIG. 9, the above-described white LED light contains more light in the above-described wavelength region than the CCFL light conventionally used, and thus the above-described blue light hazard problem is likely to occur. There are concerns.
FIG. 9 is a graph showing the emission spectrum of white LED light and the emission intensity spectrum of CCFL light.

In order to prevent the above-mentioned blue light hazard, for example, by installing a film that absorbs blue light on the outermost surface of the display device, a part of the blue light emitted from the display device is absorbed by the film and observed. A method to reduce the amount of blue light reaching the eyes of the person is being taken. In addition, there is a method for reducing the amount of blue light reaching the observer's eyes by wearing a pair of glasses having a lens that absorbs blue light so that the lens absorbs part of the blue light emitted from the display device. Has been taken.
However, when the above-described film and glasses are used, not only the blue light emitted from the display device but also a part of other light is absorbed, so that the brightness of the entire display device is lowered. There is.

  In addition, for example, it is possible to prevent a blue light hazard by adjusting the luminance of the display screen and the blue gradation by a control unit provided in the display device. There is a problem that decreases.

  The present invention has been made in view of the above circumstances, and when used in a display device, a color filter capable of preventing blue light hazard and performing display with good luminance, and a display device using the same The main purpose is to provide.

  The present invention relates to a blue light transmission subpixel comprising at least one of a transparent substrate, a blue subpixel having a blue colored layer provided on the transparent substrate, and a white subpixel provided on the transparent substrate. And a light emission intensity of light in a wavelength region of 380 nm to 480 nm included in the light source light that is provided in the blue light transmission subpixel on the transparent substrate and transmitted through the blue light transmission subpixel. A color filter comprising: a blue light reducing unit.

  According to the present invention, by including the blue light reducing means, in the display device using the color filter of the present invention, it is possible to prevent blue light hazard and display with good luminance.

  The present invention relates to a blue light transmission comprising at least one of a light source, a transparent substrate, a blue subpixel provided on the transparent substrate and having a blue colored layer, and a white subpixel provided on the transparent substrate. A light emission intensity of light in a wavelength region of 380 nm to 480 nm included in the light source light provided in the blue light transmission subpixel on the transparent base material and the blue light transmission subpixel on the transparent base material. There is provided a display device comprising: a color filter including a blue light reducing means for reducing.

  According to the present invention, by having the color filter, a blue light hazard can be prevented and a display device capable of performing display with good luminance can be obtained.

  When used in a display device, the color filter of the present invention has the effect of preventing blue light hazard and performing display with good luminance.

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 the schematic which shows the other example of the color filter of this invention. It is the schematic which shows the other example of the color filter of this invention. It is a graph which shows the spectrum etc. of the emitted light intensity of the light of the wavelength range of 380 nm-480 nm contained in the light source light which permeate | transmitted the blue light transmission subpixel in this invention. It is a schematic sectional drawing which shows an example of the display apparatus (liquid crystal display device) of this invention. It is a schematic sectional drawing which shows the other example of the display apparatus (organic EL display apparatus) of this invention. It is a schematic sectional drawing which shows the other example of the display apparatus (organic EL display apparatus) of this invention. It is a graph which shows an example of the spectrum of the emitted light intensity of white LED light and CCFL light.

The color filter and display device of the present invention will be described below.
The “light source” in the present invention refers to a light source that emits white light for display on a display device, and not only a backlight for a display device but also organic electroluminescence that emits white light (hereinafter referred to as EL). In some cases, the element is included.)

A. Color filter The color filter of the present invention is composed of at least one of a transparent substrate, a blue subpixel provided on the transparent substrate and having a blue colored layer, and a white subpixel provided on the transparent substrate. A pixel portion having a blue light transmission subpixel; and a light source light provided in the blue light transmission subpixel on the transparent base material and transmitted in the light source light transmitted through the blue light transmission subpixel. And a blue light reducing means for reducing the emission intensity.

The color filter of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic sectional view showing an example of the color filter of the present invention. As shown in FIG. 1, the color filter 10 of the present invention includes a transparent substrate 1, a blue subpixel 3 </ b> B having a blue colored layer 2 </ b> B provided on the transparent substrate 1, and a transparent resin provided on the transparent substrate 1. Blue light transmitting subpixel 3 composed of white subpixel 3W having layer 2W, red subpixel 4R having red coloring layer 2R provided on transparent substrate 1, and green coloring layer provided on transparent substrate 1 A wavelength region of 380 nm to 480 nm included in the light source light that is provided in the pixel portion 5 having the green subpixel 4G having 2G and the blue light transmitting subpixel 3 on the transparent substrate 1 and transmitted through the blue light transmitting subpixel 3 And blue light reducing means 6 for reducing the emission intensity of the light.
In addition, the color filter 10 of the present invention may have a light shielding portion 7 formed between the sub-pixels 3B, 3W, 4R, and 4G on the transparent substrate 1.
FIG. 1 shows an example in which the blue light reducing means 6 is a light absorption layer 6 a formed on the blue subpixel 3 </ b> B and the white subpixel 3 </ b> W on the transparent substrate 1.

FIG. 2 is a schematic sectional view showing another example of the color filter of the present invention. FIG. 2 shows an example in which the blue light reducing means 6 is a light absorbent 6b added to the blue colored layer 2B and the transparent resin layer 2W.
2 that are not described in FIG. 2 can be the same as those described in FIG. 1, and thus description thereof is omitted here.

FIG. 3A is a schematic plan view showing another example of the color filter of the present invention, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 4A is a schematic plan view showing another example of the color filter of the present invention, and FIG. 4B is a cross-sectional view taken along the line BB of FIG. 4A.
3 (a), 3 (b) and 4 (a), 4 (b), the blue light reducing means 6 is connected to the blue light transmitting subpixel 3 (the blue subpixel 3B and the white subpixel) on the transparent substrate 1. 3W) shows an example of the sub-pixel light-shielding portion 6c formed in 3W). Further, when the color filter 10 includes the light-shielding portion 7, the sub-pixel light-shielding portion 6c is provided in the blue light transmitting sub-pixel 3 on the transparent substrate 1 as shown in FIGS. 3 (a) and 3 (b). As shown in FIGS. 4A and 4B, the light shielding portion 7 and the sub-pixel light shielding portion 6c may be integrally formed.
3 (a), 3 (b) and FIGS. 4 (a), 4 (b) may be the same as the reference numerals described in FIG. Omitted. For ease of explanation, in FIG. 4A, the sub-pixel light-shielding part 6 and the light-shielding part 7 are shown in white, and the boundary between the sub-pixel light-shielding part 6 and the light-shielding part 7 is shown in broken lines.

Further, “the blue light reducing means reduces the light emission intensity of light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting sub-pixel” means that the color does not have the blue light reducing means. Light in a wavelength region of 380 nm to 480 nm (hereinafter referred to as reference blue light) included in the light source light transmitted through the blue light transmitting subpixel in the filter (hereinafter, referred to as a reference color filter). Compared to the emission intensity of the color filter of the present invention, the light in the wavelength region included in the light source light transmitted through the blue light transmitting subpixel in the color filter of the present invention (hereinafter referred to as adjusted blue light). The blue light reducing means may reduce the light source light transmittance of the blue light transmitting sub-pixel in the color filter of the present invention, or the light source light transmission area, etc. Sex refers to (hereinafter also will be referred as optical properties.) Is used for adjusting the.
The reference color filter means a color filter formed under the same conditions except that the blue light reducing means is not provided in the color filter of the present invention.
In the following description, the blue light transmissive subpixel in the reference color filter will be referred to as “reference blue light transmissive subpixel”, and the blue light transmissive subpixel in the color filter of the present invention will simply be described. It may be described as “blue light transmitting subpixel”.

“The blue light reducing means reduces the light emission intensity of light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting subpixel” will be described with reference to the drawings.
FIG. 5 is a graph showing an example of a spectrum of light emission intensity of light source light, reference blue light, and adjusted blue light. In FIG. 5, the light source light is white LED light, the reference blue light is light source light transmitted through a blue subpixel having a blue colored layer formed on a transparent substrate, and the adjusted blue light is It shows an example of light source light transmitted through a blue subpixel having a laminate of a blue colored layer formed on a transparent substrate and a light absorption layer made of ITO.
When the light source light is transmitted through the reference blue subpixel, usually, a part of the light in the wavelength region included in the light source light itself is absorbed by the blue colored layer formed on the transparent substrate. As shown in FIG. 5, the peak B of the emission intensity of the reference blue light is smaller than the emission intensity peak A of the light source light.
On the other hand, when the light source light is transmitted through the blue light sub-pixel according to the present invention, the blue light emission intensity of the reference blue light as shown in FIG. As compared with the peak B, the peak C of the emission intensity of the blue light after adjustment can be reduced.

  According to the present invention, by including the blue light reducing means, in the display device using the color filter of the present invention, it is possible to prevent blue light hazard and display with good luminance.

More specifically, according to the present invention, the light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting subpixel can be reduced by having the blue light reducing means. In the display device using the color filter of the present invention, light in the wavelength region that reaches the observer's eyes can be reduced, so that blue light hazard can be prevented.
Further, according to the present invention, the blue light reducing means is provided in the blue light transmitting subpixel, so that the light characteristic of the blue light transmitting subpixel is adjusted separately from the other subpixels in the pixel portion. Therefore, the luminance of the entire display device using the color filter of the present invention, the other sub-pixels can be prevented from being affected by the blue light reducing means on the light characteristics of the other sub-pixels. It is possible to improve the hue of the color.

Further, the conventional blue light hazard prevention method using the blue light absorbing film or glasses described above has a problem that the cost of the display device user increases. In addition, recently, a display device having a touch panel function has been widely used, and when the above-described film is disposed, there is a problem in that the operation of the touch panel may be hindered.
On the other hand, since the color filter of the present invention can prevent a blue light hazard by being incorporated in the display device itself, it is not necessary for the user of the display device to purchase the above-described film or glasses. It is possible to reduce the cost for the use of the touch panel and not to disturb the operation of the touch panel.

  Details of the color filter of the present invention will be described below.

I. Pixel Unit The pixel unit used in the present invention has a blue light transmission subpixel, and usually has another subpixel such as a red subpixel and a green subpixel.

1. Blue light transmissive subpixel The blue light transmissive subpixel used in the present invention is configured by at least one of a blue subpixel and a white subpixel, and has blue light reduction means.
In the present invention, as described above, the blue light transmission subpixel is a blue light reduction means for reducing the light emission intensity of light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmission subpixel. In other words, the light characteristics are adjusted so that the emission intensity of the adjusted blue light is smaller than the emission intensity of the reference blue light using the blue light reduction means. is there.

(1) Adjustment of light characteristics of blue light transmitting subpixels A method of adjusting the light characteristics of the blue light transmitting subpixels used in the present invention will be described.
The light characteristics of the blue light transmissive subpixel in the present invention are usually adjusted using white light source light. Which light source light is used for adjustment can be appropriately selected according to the use of the color filter of the present invention.
Examples of the light source that emits white light source light include white LEDs, CCFLs, and organic EL elements having a white light emitting layer. Among them, in the present invention, white LEDs are organic EL elements having a white light emitting layer. It is preferable.
As the white LED, one composed of a blue LED and a yellow phosphor, or one composed of a blue LED and a red phosphor and a green phosphor is preferably used. The light source light contains a relatively large amount of light in the wavelength region of 480 nm. Therefore, a blue light hazard can be suitably prevented by adjusting the light characteristics of the blue light transmitting subpixel in the present invention using white LED light.
In addition, in the organic EL element having a white light emitting layer, the one that emits a lot of light in the above-described wavelength region is preferably used from the viewpoint of improving productivity and extending the life. A blue light hazard can be suitably prevented by adjusting the light characteristics of the light transmissive sub-pixel using the light of the organic EL element.

The light characteristics of the blue light transmitting subpixel may be adjusted so that the adjusted blue light emission intensity is smaller than the reference blue light emission intensity. The ratio of the emission intensity of blue light after adjustment to the intensity (emission intensity ratio) can be appropriately selected depending on the use of the color filter of the present invention, and is not particularly limited.
In the present invention, for example, when the emission intensity of the reference blue light is set to 100%, the emission intensity ratio of the adjusted blue light is in the range of 50% to 80%, particularly 50% to 75%. It is preferable that the light characteristics of the blue light transmissive sub-pixel are adjusted so as to be within the range, particularly within the range of 50% to 70%. If the light emission intensity ratio is too small, it may be difficult to perform a desired color display in a display device using the color filter of the present invention. If the light emission intensity ratio is too large, This is because it may be difficult to sufficiently prevent the blue light hazard in the display device using the color filter of the present invention.

In addition, as the light characteristics of the blue light transmitting subpixel, the light emission intensity of the entire wavelength region of 380 nm to 480 nm is smaller than the reference blue light emission intensity. It may be adjusted so that the emission intensity of a part of the wavelength region may be reduced.
In the present invention, it is preferable that the emission intensity of light in the wavelength region of 380 nm to 430 nm is adjusted to be smaller than the emission intensity of the blue light after adjustment with respect to the emission intensity of the reference blue light. . In the display device using the color filter of the present invention, by reducing the emission intensity of the light on the shorter wavelength side among the light in the wavelength region of 380 nm to 480 nm described above, more energy is given to the eyes of the observer. This is because it is possible to suppress the arrival of the blue light, and to perform good blue display or the like by using the blue light on the long wavelength side, that is, the blue light having a small energy.

Specifically, when the emission intensity in the wavelength region of 380 nm to 430 nm in the reference blue light is 100%, the emission intensity ratio in the wavelength region of 380 nm to 430 nm in the adjusted blue light is less than 75%. However, it is preferably 73% or less, particularly 70% or less.
In addition, when the emission intensity in the wavelength region of 430 nm to 480 nm in the reference blue light is 100%, the emission intensity ratio in the wavelength region of 430 nm to 480 nm in the adjusted blue light is 75% or more, especially 78%. In particular, 80% or more is preferable.

In this specification, the reference blue light emission intensity means the average value of the emission intensity of each wavelength in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the reference blue light transmitting subpixel. The light emission intensity in a specific wavelength region in light refers to the average value of the light emission intensities in specific wavelength regions within the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the reference blue light transmission subpixel. .
In this specification, the light emission intensity of blue light after adjustment refers to the average value of the light emission intensity of each wavelength in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmission subpixel in the present invention. The emission intensity of the specific wavelength region in the subsequent blue light is the average of the emission intensity of each wavelength in the specific wavelength region of the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmission subpixel in the present invention. Value.
The reference blue light emission intensity and the adjusted blue light emission intensity can be obtained, for example, using a luminance meter (SR-3AR, manufactured by Topcon Corporation).

  Further, the adjusted blue light emission intensity ratio with respect to the reference blue light emission intensity and the adjusted blue light emission intensity ratio with respect to the specific blue light emission intensity ratio with respect to the reference blue light are respectively expressed by the following formulas 1 and 2. Can be obtained.

（式１中、Ｉは発光強度比、Ａ、Ｂは３８０ｎｍ（λ_３８０）〜４８０ｎｍ（λ_４８０）の波長領域内における任意の波長領域λ_Ａ〜λ_Ｂ、Ｔは基準の青色光における波長領域λ_Ａ〜λ_Ｂの各波長の発光強度を１００％とした場合の、調整後の青色光における波長領域λ_Ａ〜λ_Ｂの各波長の発光強度比である。）

(In Formula 1, I is the emission intensity ratio, A and B are arbitrary wavelength regions λ _{A to} λ _B in the wavelength region of ₃₈₀ nm (λ ₃₈₀ ) to ₄₈₀ nm (λ ₄₈₀ ), and T is the wavelength region in the reference blue light. (The emission intensity ratio of each wavelength in the wavelength region λ _{A to} λ _B in the blue light after adjustment when the emission intensity of each wavelength of λ _{A to} λ _B is 100%.)

  The light emission intensity ratio of the blue light after adjustment with respect to the light emission intensity of the blue light of the above reference can be determined using, for example, a luminance meter (SR-3AR manufactured by Topcon Corporation).

For example, when the emission intensity of the reference blue light is I ₁ and the emission intensity of the adjusted blue light is I ₂ , the ratio of the emission intensity of the adjusted blue light to the emission intensity of the reference blue light is I It may be obtained as ₂ / _{I 1.}

(2) Blue light reducing means The blue light reducing means used in the present invention reduces the light emission intensity of light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting subpixel. More specifically, the light characteristic of the blue light transmitting sub-pixel is adjusted so that the light emission intensity of the adjusted blue light becomes smaller than the light emission intensity of the reference blue light.

  Such blue light reducing means is not particularly limited as long as it is provided in the blue light transmitting subpixel on the transparent substrate. For example, when the blue light transmitting subpixel has a blue subpixel and a white subpixel. However, it may be provided in any one of the subpixels, but is preferably provided in both the blue subpixel and the white subpixel. This is because the blue light hazard can be more suitably prevented in the display device using the color filter of the present invention.

Specifically, as the blue light reducing means, at least one of a light absorption layer, a light absorber, and a sub-pixel light shielding portion is used. Two or more types of blue light reducing means may be used in one blue light transmitting subpixel. When the blue light transmitting subpixel includes a blue subpixel and a white subpixel, the blue light reducing means used for each subpixel may be the same type or different types.
Hereinafter, the light absorption layer, the light absorber, and the sub-pixel light-shielding portion used for the blue light reduction unit will be described.

(A) Light absorption layer A light absorption layer is formed in the blue light transmission subpixel on a transparent base material, and is a layer which absorbs the light of the wavelength range of 380 nm-480 nm contained in light source light. Further, the light absorption layer is usually formed separately from the blue colored layer in the blue pixel portion. On the other hand, in a white subpixel, when it has the transparent resin layer mentioned later, it forms separately from a transparent resin layer, and when it does not have a transparent resin layer, it forms directly on a transparent base material.
By including the light absorption layer, the light transmission in the wavelength region of 380 nm to 480 nm of the blue light transmission subpixel according to the present invention is compared with the light transmittance of the wavelength region of 380 nm to 480 nm of the reference blue light transmission subpixel. Since the rate can be lowered, the light emission intensity after adjustment can be made smaller than the light emission intensity of the reference blue light.

The light transmittance of the light absorption layer is not particularly limited as long as a desired blue display or white display can be performed using the blue light transmission subpixel in the display device using the color filter of the present invention. Specifically, the average transmittance of light in the wavelength region of 380 nm to 480 nm of the light absorption layer is in the range of 50% to 85%, particularly in the range of 55% to 80%, particularly 60% to 75%. It is preferable to be within the range.
When the average transmittance of the light absorption layer is too large, even when the light absorption layer is provided, it may be difficult to sufficiently prevent the blue light hazard in the display device using the color filter of the present invention. This is because if the average transmittance is too small, it may be difficult to perform a desired color display in the display device using the color filter of the present invention.

  Further, in the case of having a light absorption layer, when the average transmittance in the wavelength region of the reference blue light transmissive subpixel is 1, the average transmittance ratio of 380 nm to 480 nm of the blue light transmissive subpixel in the present invention is as follows. In the range of 0.5 to 0.85, in particular in the range of 0.55 to 0.80, particularly preferably in the range of 0.6 to 0.75. Specifically, the average transmittance of 380 nm to 480 nm of the blue light transmitting subpixel in the present invention is preferably 55% or less, in the range of 25% to 55%, and in the range of 30% to 50%. When the average transmittance of the wavelength region of the blue light transmitting subpixel in the color filter of the present invention is within the above-described range, the light emission layer is suitably adjusted to adjust the emission intensity of the blue light after adjustment. Because you can.

Moreover, in this invention, it is preferable that the average transmittance | permeability of the wavelength region of 380 nm-430 nm of a light absorption layer is lower than the average transmittance | permeability of the wavelength region of 430 nm-480 nm. This is because the emission intensity in the wavelength region of 380 nm to 430 nm in the blue light after adjustment can be made lower than the emission intensity in the wavelength region of 430 nm to 480 nm.
Specifically, the difference between the average transmittance of the light absorption layer in the wavelength region of 380 nm to 430 nm and the average transmittance of 430 nm to 480 nm is 10% or more, especially 13% or more, particularly 15% or more. It is preferable. The difference between the average transmittance of the light absorption layer in the wavelength region of 380 nm to 430 nm and the average transmittance of 430 nm to 480 nm is within the above range, so that the light on the short wavelength side included in the blue light after adjustment is more This is because the amount of light on the long wavelength side can be increased.

In addition, when the light absorption layer is included, when the average transmittance in the wavelength region of 380 nm to 430 nm in the reference blue transmitting subpixel is 1, the average transmittance in the wavelength region of 380 nm to 430 nm in the blue transmitting subpixel in the present invention. The ratio is preferably 0.7 or less, particularly 0.65 or less, and particularly preferably 0.6 or less.
Further, when the average transmittance in the wavelength region of 430 nm to 480 nm in the reference blue transmitting subpixel is 1, the average transmittance ratio in the wavelength region of 430 nm to 480 nm in the blue transmitting subpixel in the present invention is 0.75. Above all, 0.8 or more, particularly 0.85 or more is preferable.

As a method for measuring the transmittance of the light absorption layer, the reference blue light transmission subpixel, and the blue light transmission subpixel in the present invention, it can be obtained by a general measurement method. For example, the microspectroscopic device OSP-SP2000 ( It can obtain | require by measuring using OLYMPUS company).
Note that the transmittance of the blue light transmitting subpixel in the present invention in the case of having a light absorbing layer is a laminate of a blue colored layer and a light absorbing layer formed on a transparent substrate, and formed on a transparent substrate. The transmittance measured using either a laminate of a transparent resin layer and a light absorption layer or a light absorption layer formed on a transparent substrate shall be used.
The transmittance of the reference blue light transmitting subpixel was measured using either the blue colored layer formed on the transparent substrate, the transparent resin layer formed on the transparent substrate, or the transparent substrate itself. It shall mean transmittance.

  Further, the ratio of the average transmittance of the blue light transmission subpixel in the present invention to the average transmittance of the reference blue light transmission subpixel, and the blue light transmission in the present invention with respect to the average transmittance of a specific wavelength in the blue light transmission subpixel in the present invention. About the average transmittance | permeability ratio of the specific wavelength in a subpixel, it can obtain | require by the following formula 2, respectively.

（式２中、Ｊは平均透過率比、Ａ、Ｂは３８０ｎｍ（λ_３８０）〜４８０ｎｍ（λ_４８０）の波長領域内における任意の波長領域λ_Ａ〜λ_Ｂ、Ｕは基準の青色光透過副画素における波長領域λ_Ａ〜λ_Ｂの各波長の平均透過率を１とした場合の、本発明における青色光透過副画素における波長領域λ_Ａ〜λ_Ｂの各波長の平均透過率比である。）

(In Formula 2, J is an average transmittance ratio, A and B are arbitrary wavelength regions λ _{A to} λ _B within a wavelength region of ₃₈₀ nm (λ ₃₈₀ ) to ₄₈₀ nm (λ ₄₈₀ ), and U is a reference blue light transmission sub-pixel. It is an average transmittance ratio of each wavelength of the wavelength regions λ _{A to} λ _B in the blue light transmitting subpixel in the present invention when the average transmittance of each wavelength of the wavelength regions λ _{A to} λ _{B in} the pixel is 1. )

Further, for example the average transmittance of the blue light transmission subpixel criteria and J _1, when the average transmissivity of the blue light transmission sub-pixels in the present invention was J _2, the average transmittance of the blue light transmission sub-pixel of the reference The average transmittance ratio of the blue light transmissive subpixel after adjustment is obtained as J ₂ / J ₁ .

  The light absorption layer is not particularly limited as long as it is a layer that can absorb at least light in the wavelength region of 380 nm to 480 nm included in the light source light, and specifically, the light absorber is dispersed in the transparent resin layer. Alternatively, a dissolved light absorber-containing resin layer, a yellowing resin layer composed of a yellowing resin, a transparent metal oxide layer composed of a transparent metal oxide, and the like can be given.

Examples of the light absorber used in the light absorber-containing resin layer include a colorant and an ultraviolet absorber.
Examples of the colorant include C.I. I. Pigment green 7, C.I. I. Pigment green 10, C.I. I. Pigment green 36, C.I. I. Pigment green 37, C.I. I. Pigment green 58, C.I. I. Pigment blue 15: 1, C.I. I. And CI Pigment Blue 15: 3.
Examples of the ultraviolet absorber include 2- (2H-benzotriazol-2-yl) -p-cresol, 2- (2H-benzotriazol-2-yl) -4-6-bis (1-methyl-1). -Phenylethyl) phenol, 2- [5chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (tertbutylphenol), 2,4 di-tertbutyl-6- (5-chlorobenzotriazole) 2-yl) phenol, 2- (2H-benzotriazol-2-yl) phenol, 2- (2H-benzotriazol-2-yl) -4,6-tert-pentylphenol, 2- (2H-benzotriazole-2 -Yl) -4- (1,1,3,3-tetramethylbutyl) phenol, 2 (2H-benzotriazol-2-yl) -6-dodecy -4-methylphenol, 2 [2-hydroxy-3- (3,4,5,6 tetrahydrophthalimide-methyl) -5-methylphenyl] benzotriazole, octabenzone, 2-hydroxy-4-n-octoxybenzophenone, And 2- (4,6-diphenyl-1,3,5 triazin-2-yl) -5-[(hexyl) oxy] -phenol.
Moreover, as resin used for a light absorber containing resin layer, a thermosetting resin, a photocurable resin, a photosensitive resin etc. can be mentioned, for example.
In the present invention, when the light absorber is a colorant, it is preferable to use a photosensitive resin. This is because the photoabsorber-containing resin layer can be easily formed in a pattern on the blue light transmitting subpixel on the transparent substrate by using the photolithography method. On the other hand, when the light absorber is an ultraviolet absorber, it is preferable to use a thermosetting resin.
In addition, since it can be set as general resin about resin used for a light absorber containing resin layer, description here is abbreviate | omitted.

The thickness of the light absorber-containing resin layer can be appropriately selected according to the use of the color filter of the present invention, and is not particularly limited, but is in the range of 0.5 μm to 10 μm, particularly 0.5 μm to 8 μm. It is preferable that it exists in the range of 0.5 micrometer-5 micrometers especially.
Since the light absorbing agent-containing resin layer can be formed in the same manner as a general resin layer forming method, description thereof is omitted here.

In addition, when the light absorption layer is a yellowing resin layer, the yellowing resin used for the yellowing resin layer includes polyoxyethylene alkyl such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, etc. Ethers, polyoxyethylene alkylphenyl ethers such as polyoxyethylene octylphenyl ether and polyoxyethylene nonylphenyl ether, polyethylene glycol diesters such as polyethylene glycol dilaurate and polyethylene glycol distearate, sorbitan fatty acid esters, fatty acid-modified polyesters And tertiary amine-modified polyurethanes.
The thickness of the yellowing resin layer and the method for forming the yellowing resin layer can be the same as those described in the section of the light absorber-containing resin layer described above, and thus the description thereof is omitted here.

  When the light absorption layer is a metal oxide layer, examples of the metal oxide include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

The thickness of the metal oxide layer can be appropriately selected according to the use of the color filter and the like, and is not particularly limited, but can be, for example, about 200 nm to 800 nm.
The method for forming the metal oxide layer is not particularly limited as long as it can be formed in a pattern on the blue transmissive subpixel on the transparent substrate. For example, a vapor deposition method using a metal mask, a sputtering method, a vapor deposition method, a sputter method, or the like. Examples thereof include a method of forming a metal oxide layer on the entire surface of the pixel portion side surface on the transparent substrate by a method and then patterning using a photoetching method.

(B) Light absorber When the blue light reducing means is a light absorber, the light absorber is usually contained and used in a blue colored layer. Moreover, when a white subpixel has a transparent resin layer, the said light absorber is contained and used in a transparent resin layer.
By having a light absorber, the light transmittance of the blue light transmitting subpixel in the color filter of the present invention is 380 nm to 480 nm compared to the transmittance of light in the wavelength region of 380 nm to 480 nm of the blue light transmitting subpixel in the reference color filter. Since the transmittance of light in the wavelength region can be lowered, the light emission intensity after adjustment can be made smaller than the light emission intensity of the reference blue light.

The light absorber can be the same as that used for the light absorber-containing resin layer described in the section “(a) Light absorption layer” described above.
Moreover, about the light absorber used for a blue colored layer, it uses for the color filter of this invention compared with the blue colored layer used for a reference | standard color filter, for example using the blue colorant contained in a blue colored layer. You may increase content of the coloring agent in the blue colored layer formed.
The light absorber used as the blue light reducing means is preferably a colorant. Since the blue colored layer is preferably formed using a photolithography method, a wavelength region of 380 nm to 480 nm included in the light source light is used when a colorant is used as a light absorber, compared to a case where an ultraviolet absorber is used. This is because a blue colored layer capable of reducing the light can be suitably formed.

  The addition amount of the light absorber in the blue colored layer can be appropriately selected according to the use of the color filter, the type of the light absorber, and the like.

The relationship between the transmittance of the blue light transmissive subpixel and the transmittance of the reference blue light transmissive subpixel in the present invention in the case of containing a light absorber is described in the above-mentioned section “(a) Light Absorbing Layer”. Since it can be made to be the same as that which was done, description here is abbreviate | omitted.
In addition, the transmittance | permeability of the blue light transmission subpixel in this invention in the case of containing a light absorber is the blue color layer containing the light absorber formed on the transparent base material, the light formed on the transparent base material The transmittance measured using any of the transparent resin layers containing the absorbent shall be said.

(C) Subpixel light shielding portion The subpixel light shielding portion is formed inside the blue light transmitting subpixel on the transparent substrate and has a light shielding property.
By using the sub-pixel light shielding portion, the area of the opening of the blue light transmitting sub-pixel can be made smaller than the area of the opening of the other sub-pixel, and the light source light of the reference blue light transmitting sub-pixel can be transmitted. Since the light source light transmission area of the blue light transmission subpixel in the present invention can be reduced with respect to the area, the blue light emission intensity after adjustment can be reduced with respect to the reference blue light emission intensity. .

  The sub-pixel light-shielding portion only needs to have a desired opening area of the blue light transmitting sub-pixel in the present invention, and may be formed of the same material as the light-shielding portion described later, or a different material. Although it may be formed, it is preferable to be formed of the same material. This is because it can be formed in the same process as the light shielding portion described later, and the color filter of the present invention can be made more productive.

  As the sub-pixel light-shielding portion, it is sufficient that the area of the opening of the blue-light transmitting sub-pixel in the present invention can be set to a desired one. As shown in FIGS. The sub-pixel light-shielding portion 6c may be formed in a pattern shape inside the sub-pixel 3, and as shown in FIGS. 4A and 4B, the sub-pixel light-shielding portion is integrated with the light-shielding portion 7 described later. 6c may be formed. When the sub-pixel light-shielding portion is formed in a pattern inside the blue light transmitting sub-pixel, examples of the pattern shape of the sub-pixel light-shielding portion include a lattice shape, a line shape, a dot shape, and a combination thereof. Is mentioned.

The area of the opening of the blue light transmitting subpixel having the subpixel light-shielding portion in the present invention is not particularly limited as long as the adjusted blue light emission intensity can be reduced with respect to the reference blue light emission intensity. When the area of the opening of the reference blue light transmitting sub-pixel is 100%, it is within the range of 50% to 85%, particularly within the range of 55% to 80%, particularly within the range of 60% to 75%. It is preferable that This is because, by setting the area ratio of the openings of the blue light transmitting subpixels in the present invention within the above-described range, it is possible to suitably prevent the blue light hazard in the display device using the color filter of the present invention. .
The specific opening of the blue light transmitting portion in the present invention is appropriately determined according to the use of the color filter.

  Since the material, thickness, and formation method of the light-shielding portion for the pixel portion will be described in the section of the light-shielding portion described later, description thereof is omitted here.

(3) Blue subpixel and white subpixel The blue light transmissive subpixel is configured by at least one of a blue subpixel and a white subpixel. The color filter of the present invention usually has a blue subpixel and, if necessary, further has a white subpixel. Hereinafter, the blue subpixel and the white subpixel will be described.

(A) Blue subpixel The blue subpixel is provided on a transparent substrate and has a blue colored layer. The blue colored layer is usually formed on a transparent substrate and is composed of a blue colorant and a resin.
Examples of the blue 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.
Moreover, as resin used for a blue colored layer, photosensitive resin can be used suitably. The photosensitive resin can be the same as that used for a colored layer of a general color filter, and thus description thereof is omitted here.

  The thickness of the blue colored layer can be appropriately selected according to the use of the color filter and the like, and is not particularly limited, but is usually about 0.5 μm to 5 μm.

  As a formation method of a blue colored layer, a well-known method can be used as a formation method of the colored layer of a general color filter, For example, the photolithographic method etc. can be used suitably.

(B) White subpixel The white subpixel is provided on the transparent base material in the same area as the subpixel, and transmits the entire visible light region in the light source light.
The white subpixel on the transparent substrate may or may not be formed with a transparent resin layer having the same thickness as the colored layer. When it has a transparent resin layer, the flatness of the pixel part side surface of the color filter of this invention can be made favorable.
When the white subpixel does not have a transparent resin layer, the number of manufacturing steps of the color filter can be reduced, so that a color filter with better productivity can be obtained.

  When the white subpixel has a transparent resin layer, the resin used for the transparent resin layer can be the same as that used for a general color filter. For example, a photosensitive resin can be suitably used. Further, the thickness and the forming method of the transparent resin layer can be the same as the thickness and the forming method of the blue colored layer described above, and thus the description thereof is omitted here.

2. Other sub-pixels In addition to the blue light transmission sub-pixel described above, the pixel portion used in the present invention is usually provided on a transparent substrate and a red sub-pixel having a red colored layer and a transparent substrate. And a green sub-pixel having a green coloring layer.

The colored layer of each color is usually composed of a coloring material and a resin.
Examples of the red colorant used in the red colored layer include a rylene pigment, a lake pigment, an azo pigment, a quinacridone pigment, an anthraquinone pigment, an anthracene pigment, and an isoindoline pigment. These pigments may be used alone or in combination of two or more.
Examples of the green colorant used in the green colored layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, And indolinone pigments. These pigments or dyes may be used alone or in combination of two or more.

  Regarding the resin used for the red colored layer and the green colored layer, the thickness of the colored layer, and the formation method, the above-mentioned “1. Blue light transmitting subpixel (3) Blue subpixel and white subpixel (a) Blue subpixel” The description is omitted here because it can be the same as that described in the section.

3. Pixel Unit The pixel unit in the present invention has the above-described blue light transmission subpixel and other subpixels. The arrangement of the sub-pixels can be the same as the arrangement of sub-pixels used in a general display device. For example, a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type can be used, and the area of each sub-pixel can be arbitrarily set.

II. Transparent base material The transparent base material used for this invention supports the colored layer in a pixel part mentioned above, a blue light reduction means, and the transparent resin layer formed as needed.

  The transparent substrate is light transmissive. The specific light transmittance of the transparent substrate can be appropriately selected according to the use of the color filter and the like, and is not particularly limited. However, the average transmittance in the visible light region is preferably 80% or more. 90% or more is more preferable. The transmittance of the transparent substrate can be measured according to JIS K7361-1 (Plastic—Testing method for total light transmittance of transparent material).

  The transparent substrate can be the same as that used for general color filters, for example, rigid materials such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz, or transparent resin films, optical A transparent flexible material having flexibility, such as a resin plate, can be used.

  The thickness of the transparent substrate can be appropriately selected according to the use of the color filter of the present invention.

III. Other Configurations The color filter of the present invention is not particularly limited as long as it has the above-described transparent substrate and pixel portion, and other configurations than those described above can be appropriately selected and added as necessary. Examples of such a configuration include a light shielding part and an overcoat layer.

1. Light Shielding Part In the color filter of the present invention, a light shielding part may be formed between the sub-pixels on the transparent substrate. The light-shielding portion defines subpixels and has a function that enables display with good contrast in the 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.

2. Overcoat layer The color filter of the present invention may have an overcoat layer formed so as to cover the colored layer on the transparent substrate, the blue light reducing means, and the like. The overcoat layer has a function of flattening the surface of the color filter and improving the workability of the color filter.
The overcoat layer is usually formed using a transparent resin. The material, thickness, and formation method used for the overcoat layer can be the same as those used for a general color filter, and thus the description thereof is omitted here.

3. Other Configurations The color filter of the present invention can be arbitrarily added with any configuration as necessary in addition to the above-described light shielding portion and overcoat layer.

IV. Color Filter The color filter manufacturing method of the present invention is not particularly limited as long as the color filter having the above-described configuration can be manufactured, and can be the same as a general color filter manufacturing method. Description is omitted.

  The color filter of the present invention can be used for a display device having a light source. The color filter of the present invention can be suitably used particularly for a liquid crystal display device having a white LED as a light source and an organic EL display device having an organic EL element having a white light emitting layer as a light source. The display device using the color filter of the present invention will be described in detail in the section “B. Display device” described later.

B. Display device The display device of the present invention comprises at least one of a light source, a transparent base material, a blue subpixel having a blue colored layer provided on the transparent base material, and a white subpixel provided on the transparent base material. Of the wavelength region of 380 nm to 480 nm included in the light source light provided in the pixel portion having the blue light transmitting subpixel and the blue light transmitting subpixel on the transparent substrate and transmitted through the blue light transmitting subpixel. And a color filter provided with a blue light reducing means for reducing the light emission intensity.

  According to the present invention, by having the color filter, a blue light hazard can be prevented and a display device capable of performing display with good luminance can be obtained.

More specifically, according to the present invention, since the light in the wavelength region of 380 nm to 480 nm contained in the light source light can be reduced by having the color filter, the wavelength region reaching the observer's eyes. The display device can reduce the amount of light and can prevent blue light hazard.
In addition, according to the present invention, since the color filter is provided, the light characteristic of the blue light transmitting subpixel can be adjusted separately from the other subpixels in the pixel portion. On the other hand, since the influence of the blue light reducing means cannot be exerted, a good color display can be performed and a display device having a good luminance can be obtained.
Moreover, the cost which the user of a display apparatus bears can be reduced, and also when a display apparatus has a touch-panel function, it can operate a touch panel favorably.

The display device of the present invention is not particularly limited as long as it has the above-described color filter and light source, and examples thereof include a liquid crystal display device and an organic EL display device.
Hereinafter, the case where the display device of the present invention is a liquid crystal display device and the case where it is an organic EL display device will be described.

I. Liquid crystal display device The liquid crystal display device of the present invention usually has a backlight as a light source, the above-described color filter, a counter substrate having a counter substrate and a counter electrode formed on the counter substrate, and a color And a liquid crystal layer including a liquid crystal disposed between the filter and the counter electrode substrate.

The liquid crystal display device of the present invention will be described with reference to the drawings.
FIG. 6 is a schematic sectional view showing an example of the display device of the present invention. FIG. 6 shows an example in which the display device 100 is a liquid crystal display device 101. As shown in FIG. 6, the liquid crystal display device 101 of the present invention includes a backlight 21 that is a light source 20, a color filter 10, a counter substrate 31 and a counter electrode 32 formed on the counter substrate 31. The electrode substrate 30 and the liquid crystal layer 40 containing liquid crystal disposed between the color filter 10 and the counter electrode substrate 30, and the backlight 21 is disposed on the counter electrode substrate 30 side It is. Moreover, it has the sealing agent 50 which seals the liquid crystal layer 40 arrange | positioned between the color filter 10 and the counter electrode base material 30. FIG.
Note that the color filter 10 in FIG. 6 can be the same as that described with reference to FIG.
Hereinafter, the details of the liquid crystal display device of the present invention will be described.

1. Color Filter The details of the color filter used in the present invention are the same as those described in the section “A. Color Filter” described above, and thus the description thereof is omitted here.

2. Light source (backlight)
The light source used in the present invention is usually disposed on the side opposite to the display surface side of the liquid crystal display device as a backlight.
The light source used in the present invention is not particularly limited as long as it can emit white light including light in the wavelength region of 380 nm to 480 nm, and examples thereof include white LEDs and CCFLs. However, a white LED is preferable. Note that the reason for this can be the same as that described in the section “A. Color filter” described above, and a description thereof will be omitted here.

  Since the configuration, form, and the like of the light source (backlight) can be the same as those used in a general liquid crystal display device, description thereof is omitted here.

3. Counter electrode substrate and liquid crystal layer The counter electrode substrate used in the present invention has a counter substrate and a counter electrode formed on the counter substrate. The liquid crystal layer is disposed between the color filter and the counter electrode substrate and contains liquid crystal.
The liquid crystal used for the counter electrode substrate and the liquid crystal layer used in the present invention can be appropriately selected and used according to the driving method of the liquid crystal display device of the present invention. Further, the counter electrode base material and the liquid crystal can be the same as those used in a general liquid crystal display device, and thus description thereof is omitted here.

  The driving method of the liquid crystal display device is not particularly limited, and a driving method generally used for a liquid crystal display device can be employed. Examples of such a drive method include a TN method, an IPS method, an OCB method, and an MVA method. In the present invention, any of these methods can be preferably used.

4). Liquid crystal display device The liquid crystal display device of the present invention is not particularly limited as long as it has a light source, a color filter, a counter electrode base material, and a liquid crystal layer, and a configuration other than the above is appropriately selected and added as necessary. be able to. Examples of such a configuration include an alignment film and a polarizing plate. Since these configurations can be the same as those used in a general liquid crystal display device, description thereof is omitted here.

  Since the manufacturing method of the liquid crystal display device of the present invention can be the same as the manufacturing method of a general liquid crystal display device, description thereof is omitted here.

II. Organic EL Display Device When the display device of the present invention is an organic EL display device, the organic EL display device has an organic EL element as a light source. In this case, the organic EL display device has two modes due to the difference in structure. Specifically, an embodiment (first embodiment) which is a top emission type organic EL display device and an embodiment (second embodiment) which is a bottom emission type organic EL display device can be exemplified.
Hereinafter, each aspect will be described.

1. 1st aspect The organic EL display apparatus of this aspect is a top emission type organic EL display apparatus which has an organic EL element as a light source, and usually a color filter, a base material, and the 1st electrode formed on the base material And an organic EL element having a second electrode layer formed on the organic EL layer, and one surface of the color filter and a substrate An organic EL element is disposed between the two.

The organic EL display device of this embodiment will be described with reference to the drawings.
FIG. 7 is a schematic sectional view showing another example of the display device of the present invention. FIG. 7 shows an example in which the display device 100 is a top emission type organic EL display device 102 having the organic EL element 22 as the light source 20. As shown in FIG. 7, the organic EL display device 102 of this aspect is formed on the color filter 10, the base material 23, the first electrode layer 22a formed on the base material 23, and the first electrode layer 22a. An organic EL layer 22b including a light emitting layer, and an organic EL element 22 having a second electrode layer 22c formed on the organic EL layer 22b. The organic EL element 22 is disposed between the two. Further, FIG. 7 shows an example having a sealing agent 50 for sealing the organic EL element 22 disposed between the color filter 10 and the base material 23. Note that the color filter 10 in FIG. 7 can be the same as that described with reference to FIG.
Hereinafter, the details of the organic EL display device of the present invention will be described.

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

(2) Substrate Next, the substrate in this embodiment will be described.
The base material in this embodiment is formed with an organic EL element described later.

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

  As the base material, for example, inflexible rigid materials such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate, or flexible materials such as resin film and optical resin plate are used. 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 substrate.
As the TFT, those generally used in organic EL display devices can be used.

(3) Light source (organic EL element)
The organic EL display device of this embodiment has an organic EL element as a light source.
The organic EL element used in this embodiment has an organic EL layer that is formed on the substrate and includes a light emitting layer. The organic EL element is usually formed on a first electrode layer formed on a substrate, an organic EL layer including a light emitting layer formed on the first electrode layer, and a first electrode formed on the organic EL layer. It has 2 electrode layers, and has an insulating layer, a partition, etc. as needed. 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, at least a light-emitting layer corresponding to a blue light transmitting subpixel 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.
The light emitting layer corresponding to the red subpixel and the green subpixel may emit white light as described above, and is a light emitting layer that emits light of a color corresponding to the color of each colored subpixel. May be.
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, or by a dry process such as a vacuum evaporation method. 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 substrate. Moreover, the 1st electrode layer may be uniformly formed on the base material, and may be formed in pattern form, and is suitably selected according to the use and drive method of the organic electroluminescent display apparatus of this aspect. .
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 first electrode layer (back electrode layer) is formed in a pattern on the substrate, an insulating layer is formed in the opening of the first electrode layer (back electrode layer). 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 according to this aspect is not particularly limited as long as it has the above-described color filter, base material, and organic EL element.

In this aspect, a sealing material is usually disposed between the color filter and the base material and on the outer periphery of the color filter and the base material. The sealing material is provided for adhering the color filter and the base material 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 a color filter and a base material and can prevent the organic EL element from coming into contact with moisture or the like in the atmosphere. What is used 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 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 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 base material instead of the sealing material described above. Also good. 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 As a method for driving 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 according to this aspect is a bottom emission type organic EL display device having an organic EL element as a light source, and is usually a color filter and a first electrode layer formed on a pixel portion of the color filter. And an organic EL layer having a light emitting layer formed on the first electrode layer, and an organic EL element having a second electrode layer formed on the organic EL layer.

The organic EL display device of this embodiment will be described with reference to the drawings.
FIG. 8 is a schematic sectional view showing another example of the display device of the present invention. FIG. 8 shows an example in which the display device 100 is a bottom emission type organic EL display device 103 having the organic EL element 22 as the light source 20. As shown in FIG. 8, the organic EL display device 103 of this aspect includes a color filter 10, a first electrode layer 22 a formed on the pixel portion 5 of the color filter 10, and light emission formed on the first electrode layer 22 a. And an organic EL element 22 having a second electrode layer 22c formed on the organic EL layer 22b. Since the color filter 10 can be the same as that described in FIG. 1, the description thereof is omitted here.
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 the overcoat layer formed on the colored layer.

(2) Light source (organic EL element)
The organic EL element used in this embodiment has an organic EL layer including a light emitting layer, which is formed on the pixel portion of the color filter. 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 aspect, the organic EL element may be formed directly on the surface of the colored layer or the like, for example, via another layer such as an overcoat layer formed on the surface of the colored layer or the like. Good.

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 sealing substrate as necessary. When it has a sealing base material in this aspect, a sealing base material is arrange | positioned so as to oppose the colored layer and organic EL element side surface of a color filter. Further, the above-described sealing material or adhesive layer is disposed between the color filter and the sealing substrate. About the sealing base material, since it can be the same as that of the opposing base material demonstrated by the term of "1. 1st aspect" mentioned above, description here is abbreviate | omitted. About a sealing material and an adhesive bond layer, since it can be made to be the same as that of what was demonstrated by the term of "1. 1st aspect" mentioned above, description here is abbreviate | omitted.

  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 the same configuration as the technical idea described in the claims of this aspect and exhibits any similar function and effect. Are included in the technical scope.

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

[Example 1]
(Adjustment of composition for forming light shielding layer)
First, 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) in the polymerization tank. After the parts were charged, stirred and dissolved, 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 prepare a curable resin composition having the following composition.
<Composition of curable resin composition>
-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

Next, 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

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

(Formation of light shielding layer)
Next, the obtained composition for forming a light shielding layer was applied to a transparent substrate, patterned by a photolithography method, and then baked to form a light shielding layer.

(Formation of colored layer)
Next, a red colored layer forming composition, a green colored layer forming composition, and a blue colored layer forming composition having the following compositions were prepared.

<Red colored layer forming composition>
・ C. I. Pigment Red 254 ... 10 parts by mass, polysulfonic acid type polymer dispersant ... 8 parts by mass, the above curable resin composition ... 15 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

<Green colored layer forming composition>
・ C. I. Pigment Green 58: 10 parts by mass / C.I. I. Pigment Yellow 138 ... 3 parts by mass, polysulfonic acid type polymer dispersant ... 8 parts by mass, the curable resin composition ... 12 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

<Blue colored layer forming composition>
・ C. I. Pigment Blue 1 ... 5 parts by mass, polysulfonic acid type polymer dispersant ... 3 parts by mass, the above curable resin composition ... 25 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

<White layer forming composition>
-The said curable resin composition A ... 33 mass parts-3-methoxybutyl acetate ... 67 mass parts

(Formation of colored layer)
Next, a red colored layer forming composition was applied by spin coating so as to cover the light shielding layer on the glass substrate, patterned by photolithography, and then baked to form a red colored layer.
Then, the green colored layer and the blue colored layer were formed by the same operation using the green colored layer forming composition and the blue colored layer forming composition. As a result, a colored layer in which a red colored layer, a green colored layer, and a blue colored layer were arranged was formed.
The thickness of the colored layer was 1.5 μm for the red colored layer, 1.5 μm for the green colored layer, 1.5 μm for the blue colored layer, and 1.5 μm for the white colored layer.

(Production of blue light transmitting subpixel)
Next, after patterning by the same method as each colored layer forming method on the blue colored layer and the white layer using the composition for blue light reducing means having the following composition, it is baked to absorb light having a thickness of 1.5 μm. A blue light transmissive subpixel was formed by forming a layer.

<Composition for blue light reducing means>
・ C. I. Pigment Blue 15: 3 5 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, the curable resin composition 25 parts by mass, 3-methoxybutyl acetate 67 parts by mass

  The color filter was produced by the above process.

(Production of organic EL display device)
As an EL element side substrate for producing an organic EL display device facing the above color filter, an organic EL element side substrate provided with a white light emitting source was produced in the following manner.
First, a thin film transistor circuit was produced according to a conventional method on a transparent substrate.
On this, a lower electrode layer made of aluminum was formed so as to correspond to the colored layers of each color of the color filter substrate, and an insulating layer (partition wall) made of polyimide was formed in the gap between these lower electrode layers. Next, a white light emitting organic EL element (laminated structure of a hole injection layer, a white light emitting layer, and an electron injection layer) is formed in the gap between the insulating layers (partition walls), and indium tin oxide (ITO) is formed thereon. An upper transparent electrode layer was formed.
Thereafter, the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate having the upper transparent electrode layer are brought into contact with each other, and an adhesive (NT-01UV manufactured by Nitto Denko Corporation) is applied. Thus, an organic EL display device was produced.

[Example 2]
By the same method as in Example 1, the coloring layer was formed.

(Production of blue light transmitting subpixel)
Next, an ITO film having a thickness of 300 nm was formed only on the blue colored layer and the white layer by sputtering. Thereafter, annealing was performed for 40 minutes at 150 ° C. Thereafter, an organic EL display device was produced by the same method as in Example 1.

[Example 3]
By the same method as in Example 1, the coloring layer was formed. Then, the light absorption layer was formed by the method similar to Example 1 using the following composition for blue light reduction means, and the color filter was obtained. Thereafter, an organic EL display device was produced by the same method as in Example 1.

<Composition for blue light reducing means>
・ C. I. Pigment Green 7 2 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, the curable resin composition A 25 parts by mass, 3-methoxybutyl acetate 70 parts by mass

[Example 4]
A blue light transmitting subpixel was prepared by changing the materials of the blue colored layer and the white layer and preparing the colored layer in the same manner as in Example 1. Thereafter, an organic EL display device was produced by the same method as in Example 1.

<Blue colored layer forming 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 ... 62 parts by mass, 2- (2H-benzotriazole -2-yl) -p-cresol: 5 parts by mass

<White layer forming composition>
-Curable resin composition A ... 28 parts by mass-3-methoxybutyl acetate ... 67 parts by mass-2- (2H-benzotriazol-2-yl) -p-cresol ... 5 parts by mass

[Example 5]
The line width of the light shielding layer in the blue light transmitting subpixel portion was changed, and the aperture ratio was changed as shown in Table 1 below. Thereafter, a colored layer was formed by the same method as in Example 1 to obtain a blue light transmitting subpixel portion. Thereafter, an organic EL display device was produced by the same method as in Example 1.

[Comparative Example 1]
A color filter was obtained by forming up to the colored layer in the same manner as in Example 1. Thereafter, an organic EL display device was produced by the same method as in Example 1.

<Evaluation>
Using the microspectroscope OSP-SP2000 (manufactured by OLYMPUS), the average transmittance ratio of the adjusted blue light transmissive subpixel to the reference blue light transmissive subpixel was evaluated for the obtained color filter.
Moreover, measurement evaluation of Y ratio was performed with respect to the obtained organic EL display apparatus using the luminance meter (SR-3AR by Topcon Co., Ltd.). A case where any one of the following criteria 1 to 3 was satisfied was evaluated as ◯, and a case where none of them was satisfied was evaluated as ×. In addition, Examples were compared by setting the average transmittance ratio, Y ratio, and emission intensity ratio of Comparative Example 1 to 1. The results are shown in the table.

Judgment criterion 1: The emission intensity ratio of the blue light transmitting subpixel in the present invention to the reference blue light transmitting subpixel in the wavelength region of 380 nm to 480 nm is in the range of 0.50 to 0.80.
Judgment criterion 2: The emission intensity ratio of the blue light transmission subpixel to the reference blue light transmission subpixel in the wavelength region of 380 nm to 430 nm is less than 0.75, and the reference blue light transmission subpixel in the wavelength region of 430 nm to 480 nm The light emission intensity ratio of the blue light transmitting sub-pixel to is 0.75 or more.
Judgment criterion 3: The emission intensity ratio of the blue light transmitting subpixel to the reference blue light transmitting subpixel in the wavelength region of 380 nm to 480 nm by adjusting the aperture ratio is in the range of 0.50 to 0.80.

  In the organic EL display devices of Examples 1 to 5 in which the color filter is provided with blue light reducing means, it was confirmed that the emission intensity of blue light was reduced.

DESCRIPTION OF SYMBOLS 1 ... Transparent base material 2B ... Blue colored layer 2W ... Transparent resin layer 3B ... Blue subpixel 3W ... White subpixel 3 ... Blue light transmission subpixel 5 ... Pixel part 6 ... Blue light reduction means 10 ... Color filter 20 ... Light source 100 … Display device

Claims (2)

A transparent substrate;
A pixel portion having a blue light transmissive subpixel configured on at least one of a blue subpixel having a blue colored layer provided on the transparent substrate and a white subpixel provided on the transparent substrate;
Blue light reducing means provided on the blue light transmitting subpixel on the transparent substrate, and reducing the light emission intensity of light in the wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting subpixel;
A color filter comprising: A light source;
A pixel portion having a transparent base material, a blue subpixel having a blue colored layer provided on the transparent base material, and a blue light transmitting subpixel configured by at least one of a white subpixel provided on the transparent base material, And a blue light reducing means that is provided in the blue light transmitting subpixel on the transparent substrate and reduces the light emission intensity of light in a wavelength region of 380 nm to 480 nm included in the light source light transmitted through the blue light transmitting subpixel. A color filter comprising:
A display device comprising:

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