JP4532999B2 - Color filter, method for adjusting photosensitive resin composition set for color filter, and photosensitive resin composition set for color filter - Google Patents

Description

  The present invention relates to a color (image) display technique in an apparatus using a color filter such as a color liquid crystal display device.

  In a color liquid crystal display device or the like, color (image) display is performed using a color filter. A color filter is generally manufactured by forming colored transparent fine patterns (called pixels) of three colors on a transparent substrate such as glass or an opaque substrate such as silicon. As the three colors, three primary colors of red (R), green (G), and blue (B) are often adopted.

  In this liquid crystal display device, various colors (images) are reproduced by coloring light passing through a pair of polarizing plates facing each other through liquid crystal with a color filter of three primary color pixels. Various colors are reproduced from the case where light is transmitted at maximum (white display) to the case where light is blocked to a minimum in all pixels (black display). In such a liquid crystal display device, in order to improve power consumption, it is required to improve the brightness of the color filter during white display, and it is also required to improve color reproducibility without reducing the brightness. ing. Therefore, for example, various improvements have been made on the resin composition for forming each color pixel of the color filter. For example, a radiation-sensitive composition for blue color filters having a sufficiently large stimulation value Y (luminance) during white display has been developed. If such a blue composition is used, a pigment can be used to enhance the color reproduction range. It is said that even if the density is increased, a decrease in luminance of the liquid crystal display device can be prevented (see, for example, Patent Document 1). In addition, a coating composition for a green color filter having an increased light transmittance in the visible light region has been developed. By using such a green composition, color reproducibility and luminance of a liquid crystal display device can be improved. (For example, refer to Patent Document 2). In addition, a composition for a color filter in which the average particle size of pigment is adjusted to a predetermined range is disclosed, and it is said that the transmittance and contrast can be improved by using this composition (for example, see Patent Document 3).

Improvements have also been made in terms of color filters. For example, Patent Document 4 proposes a color filter in which the transmittance and color purity of red, blue, and green pixels are increased. According to the report, low power consumption and high color reproducibility can be achieved. Patent Document 5 proposes a color filter in which the transmittance of red pixels and the transmittance of green pixels are adjusted within a predetermined range, and the color temperature during light transmission (when white is displayed) can be increased.
JP 2001-147315 A (second page, left column, second line to third page, right column, 14th line) JP-A-10-160928 (second page, left column, second line to right column, 21st line) JP-A-9-197118 (2nd page, left column, 2nd line to 3rd page, left column, 35th line) JP 2001-272523 A (second page, left column, second line to third page, left column, ninth line) JP 2001-116918 A (2nd page, left column, 2nd line to right column, 27th line)

  By the way, the required characteristics of the liquid crystal display device are not limited to the luminance at the time of white display (or the color temperature of white display) and the color reproducibility as described above. That is, it is also important that there is little chromaticity deviation between white display and black display. Such required characteristics cannot be evaluated by the display characteristics at any one point from white display to black display. Conventionally, the technology related to the structure of the liquid crystal display element, the technology related to the characteristics of the drive circuit, etc. are fully used. For example, adjustment using a polarizing film and subtle adjustment for each color pixel are necessary. However, adjustment with a polarizing film lowers the contrast of the liquid crystal display device, and it is extremely complicated to make fine adjustments for each color pixel.

  The present invention has been made paying attention to the above-described circumstances, and an object thereof is to provide a technique capable of reducing adjustment by a polarizing film and adjustment for each color pixel in a liquid crystal display device. .

  As a result of intensive research to solve the above problems, the inventors have made adjustments to polarizing films in a liquid crystal display device in order to reduce the chromaticity shift between white display and black display. We succeeded in surpassing the conventional common sense that we had to rely on adjustment for each color pixel. That is, the three photosensitive resin compositions having different colors satisfy a specific condition so as to appropriately balance the resin compositions, and a color filter is formed from the three photosensitive resin compositions (sets). As a result, the inventors have found that adjustment of the polarizing film and adjustment for each color pixel in the liquid crystal display device can be reduced, and the present invention has been completed.

The color filter according to the present invention is a color filter having a first color resin composition film, a second color resin composition film, and a third color resin composition film, and satisfies the following requirements. That is, the resin composition film of each color of the color filter is sandwiched between a pair of polarizing plates, and the CIE is divided for each color of the resin composition film according to whether the polarizing axes of the polarizing plates are parallel to each other or orthogonal to each other. (International Commission on Illumination) When tristimulus values “X, Y, Z” of the 1931 color system are measured, white display coordinates (u ′ _white , v ′ _white ) and black display coordinates (u ′ _black ) determined by the following formulas , V ′ _black ) are coordinates P ₁ (0.18, 0.52), coordinates Q ₁ (0.25, 0.52), coordinates R ₁ (0.23, 0.42), coordinates S ₁ (0 .15, 0.42) within the range of a straight line connecting the four coordinates.

u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.

X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” represents three of the transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. FIG. 4 shows measurement results when the stimulus values “X, Y, Z” are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the resin compositions of the second color when the polarization axes are parallel to each other The tristimulus values “X, Y, Z” of the physical film and the resin composition film of the third color are values measured in the same manner as in the case of the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Represents the tristimulus values “X, Y, Z” of the resin composition film of the first color, the resin composition film of the second color, and the resin composition film of the third color when the polarization axes are orthogonal to each other. The value when measured in the same manner as in the parallel case is shown.

  According to such a color filter, the balance between white display and black display is appropriate, and the chromaticity shift is small from white display to black display. Adjustment and adjustment for each color pixel can be reduced.

Here, assuming that the chromaticity coordinates of the standard light C defined by the CIE (International Commission on Illumination) are (u ′ _C , v ′ _C ), the following inter-coordinate distance d _C = [(u ′ _C −u ' _white ) ² + (v' _C- v ' _white ) ² ] ^0.5 + [(u' _C- u ' _black ) ² + (v' _C- v ' _black ) ² ] ^0.5
Coordinate distance d _C calculated by is preferably not 75 × ^{10 -3} or less.

If the chromaticity coordinates of the standard light D ₆₅ defined by the CIE (International Lighting Commission) are (u ′ _D65 , v ′ _D65 ), the distance between coordinates d _D65 = [(u ′ _D65 −u ' _white ) ² + (v' _D65- v ' _white ) ² ] ^0.5 + [(u' _D65- u ' _black ) ² + (v' _D65- v ' _black ) ² ] ^0.5
It is also preferable that the inter-coordinate distance d _D65 calculated by the following is 60 × 10 ⁻³ or less.

In addition, the reciprocal correlated color temperature of standard light C defined by the CIE (International Commission on Illumination) is R _C, and the reciprocal correlated color temperature corresponding to the white display coordinates (u ′ _white , v ′ _white ) is R _white. When the inverse correlation color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black , (| R _white −R _C | + | R _black −R _C |) ≦ 90 MK ⁻¹ It is also preferable to satisfy.

Furthermore, the reciprocal correlated color temperature of the standard light D ₆₅ determined by the CIE (International Commission on Illumination) is R _D65, and the reciprocal correlated color temperature corresponding to the white display coordinates (u ′ _white , v ′ _white ) is R _white. (| R _white −R _D65 | + | R _black −R _D65 |) ≦ 90 MK ⁻¹ , where R _black is the reciprocal correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) It is also preferable to satisfy

  According to these, the chromaticity shift is further reduced.

_{Further, X 1, parallel, Y 1} , parallel, Z 1, first color chromaticity coordinates of which are defined by _{parallel, X 2, parallel, Y} 2, parallel, second color chromaticity defined by Z _{2, parallel} The area of the triangle created by plotting the coordinates and the chromaticity coordinates of the third color defined by X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} on the UCS chromaticity diagram of CIE 1976 is NTSC RGB It is also preferable that it is 70 to 215% with respect to the area of the triangle created by plotting the chromaticity coordinates of the above on the UCS chromaticity diagram. According to this, a display device with high color reproducibility can be realized.

In this color filter, it is preferable that the locus from the white display coordinates (u ′ _white , v ′ _white ) to the black display coordinates (u ′ _black , v ′ _black ) is substantially parallel to the black body locus. .

The color filter preferably has a correlated color temperature of black display coordinates (u ′ _black , v ′ _black ) of 5000K to 25000K.

  In addition, at least one of the first color resin composition film, the second color resin composition film, and the third color resin composition film preferably contains a color pigment. In this case, in addition to the color pigment, it is also preferable to further contain an extender pigment.

  Further, at least one of the first color resin composition film, the second color resin composition film, and the third color resin composition film preferably contains a fluorescent component. .

The method for adjusting the photosensitive resin composition set for a color filter according to the present invention includes a first color photosensitive resin composition, a second color photosensitive resin composition, and a third color photosensitive resin composition. A method for adjusting a photosensitive resin composition set for a color filter, comprising: forming a photosensitive resin composition of each color to obtain a resin composition film of each color; and a pair of resin composition films respectively The tristimulus value “X” of the CIE (International Commission on Illumination) 1931 color system for each resin composition film is divided into a case where the polarizing axes of the polarizing plate are parallel to each other and a case where they are orthogonal to each other. , Y, Z ”, a chromaticity acquisition step of acquiring white display coordinates (u ′ _white , v ′ _white ) and black display coordinates (u ′ _black , v ′ _black ) by the following equations, Change the chromaticity coordinates of one color, the chromaticity coordinates of the second color, and the chromaticity coordinates of the third color Including an adjustment step of adjusting the components of at least one of the photosensitive resin composition so that the distance is 75 × 10 ^-3 or less between the white display coordinates and the black display coordinates without the.

u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.

X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” is the tristimulus value of the transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other The measurement results when “X, Y, Z” are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight are shown. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the resin compositions of the second color when the polarization axes are parallel to each other The tristimulus values “X, Y, Z” of the physical film and the resin composition film of the third color are values measured in the same manner as in the case of the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Represents the tristimulus values “X, Y, Z” of the resin composition film of the first color, the resin composition film of the second color, and the resin composition film of the third color when the polarization axes are orthogonal to each other. The value when measured in the same manner as in the parallel case is shown.

  According to such an adjustment method, each photosensitive resin composition of the photosensitive resin composition set is formed such that a combination of the photosensitive resin compositions capable of forming a color filter as in the above-described invention can be formed by forming a film. Can be adjusted easily.

  The method for preparing another photosensitive resin composition set for a color filter according to the present invention includes a first color photosensitive resin composition, a second color photosensitive resin composition, and a third color photosensitive resin composition. A method for preparing a photosensitive resin composition set for a color filter having at least a film forming step, a measuring step, a contrast obtaining step, and an adjusting step.

  In the film forming step, a photosensitive resin composition of each color is formed to obtain a resin composition film of each color.

  In the measurement process, the resin composition film is sandwiched between a pair of polarizing plates, and each of the resin composition films of each color is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where they are orthogonal to each other. Meeting) Measure Y in the tristimulus values of the 1931 color system.

In the contrast acquisition step, the contrasts T ₁ , T ₂ , and T ₃ for each resin composition film are acquired by the following equation.

T ₁ = Y _{1, parallel} / Y _{1, orthogonal}
T ₂ = Y _{2, parallel} / Y _{2, orthogonal}
T ₃ = Y _{3, parallel} / Y _{3, orthogonal}
In the formula, Y _{1, parallel} represents Y among the tristimulus values of transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. The measurement result when using a tube light source as a backlight is shown. Y _{2, parallel} and Y _{3, parallel} represent Y of the tristimulus values of the resin composition film of the second color and the resin composition film of the third color when the polarization axes are parallel to each other. The values when measured in the same manner as in the above are shown. Y _{1, orthogonal} , Y _{2, orthogonal} , Y _{3, orthogonal} are the first color resin composition film, the second color resin composition film, and the third color resin composition when the polarization axes are orthogonal to each other Of the tristimulus values of the membrane, Y is a value measured in the same manner as in the parallel case.

In the adjustment step, at least any one of the contrast ratios between the resin composition films is improved without changing the chromaticity coordinates of the first color, the chromaticity coordinates of the second color, and the chromaticity coordinates of the third color. The adjustment of the components of the photosensitive resin composition is performed so that the white display coordinates and the black display coordinates are within the range of a straight line connecting the four coordinates P ₁ , Q ₁ , R ₁ , and S _1. To do.

  According to such an adjustment method, each photosensitive resin composition of the photosensitive resin composition set is formed such that a combination of the photosensitive resin compositions capable of forming a color filter as in the above-described invention can be formed by forming a film. Can be adjusted easily.

  Here, as a preferable specific example of the adjustment step, for example, when the photosensitive resin composition corresponding to the resin composition film having the lowest contrast among the resin composition films contains a coloring pigment, the coloring is performed. The average particle diameter of the pigment can be reduced.

  In addition, for example, when the photosensitive resin composition corresponding to the resin composition film having the highest contrast among the resin composition films contains a color pigment, the average particle diameter of the color pigment may be increased. it can.

  In addition, for example, when the photosensitive resin composition corresponding to the resin composition film having the highest contrast among the resin composition films contains a color pigment, the photosensitive resin composition containing the color pigment is further added to the photosensitive resin composition containing the color pigment. Extender pigments can also be added.

  In addition, for example, a fluorescent component can be further added to the photosensitive resin composition corresponding to the resin composition film having the highest contrast among the resin composition films.

  The photosensitive resin composition set according to the present invention comprises a first color photosensitive resin composition, a second color photosensitive resin composition, and a third color photosensitive resin composition, which are used as a filter. A color image can be displayed by combining the transmitted light of each other, and the photosensitive resin composition set has a gist in that it has the following characteristic (1).

Characteristics (1)
Each color photosensitive resin composition is formed into a film and sandwiched between a pair of polarizing plates. Each of the color films is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where the polarizing axes are orthogonal to each other. Society) When the tristimulus values “X, Y, Z” of the 1931 color system are measured, white display coordinates (u ′ _white , v ′ _white ) and black display coordinates (u ′ _black , v ′ _black ) obtained by the following formulas ) Are coordinates P ₁ (0.18, 0.52), coordinates Q ₁ (0.25, 0.52), coordinates R ₁ (0.23, 0.42), coordinates S ₁ (0.15, 0). .42) must be within the range of a straight line connecting the four coordinates u ′ _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.

X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” indicates the tristimulus values “X, _parallel ” of transmitted light when the film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. Y, Z "is a measurement result when measuring using the three-wavelength tube light source shown in FIG. 1 as a backlight. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the second color films when the polarization axes are parallel to each other and The tristimulus values “X, Y, Z” of the third color film are shown as measured in the same manner as in the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Measured the tristimulus values “X, Y, Z” of the film of the first color, the film of the second color, and the film of the third color when the polarization axes are orthogonal to each other in the same manner as in the parallel case. Indicates the value of time.

Here, the photosensitive resin composition set of the present invention has the following formula between coordinates of chromaticity coordinates of standard light C defined by CIE (International Commission on Illumination) as (u ′ _C , v ′ _C ): Distance d _C = [(u ′ _C −u ′ _white ) ² + (v ′ _C −v ′ _white ) ² ] ^0.5 + [(u ′ _C −u ′ _black ) ² + (v ′ _C −v ′ _black ) ² ] ^0.5
Coordinate distance d _C calculated by is preferably not 75 × ^{10 -3} or less.

In addition, this photosensitive resin composition set is expressed by the following formula: inter-coordinate distance d, where (u ′ _D65 , v ′ _D65 ) is the chromaticity coordinate of the standard light D ₆₅ defined by the CIE (International Commission on Illumination). _{D65 = [(u 'D65 -u} ' white) 2 + (v 'D65 -v' white) 2] 0.5 + [(u 'D65 -u' black) 2 + (v 'D65 -v' black) 2] ^0.5
It is also preferable that the inter-coordinate distance d _D65 calculated by the following is 60 × 10 ⁻³ or less.

In addition, this photosensitive resin composition set corresponds to white display coordinates (u ′ _white , v ′ _white ), where R _C is the reciprocal correlated color temperature of standard light C defined by CIE (International Commission on Illumination). When the reciprocal correlated color temperature is R _white and the reciprocal correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black , (| R _white −R _C | + | R _black − It is also preferable that R _C |) ≦ 90 MK ⁻¹ is satisfied.

In addition, this photosensitive resin composition set has white display coordinates (u ′ _white , v ′ _white ) with R _D65 as the reciprocal correlated color temperature of standard light D ₆₅ defined by CIE (International Commission on Illumination). When the corresponding inverse correlated color temperature is R _white and the inverse correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black , (| R _white −R _D65 | + | R _black It is also preferable that −R _D65 |) ≦ 90 MK ⁻¹ is satisfied.

Further, the photosensitive resin composition set, X _{1, parallel,} Y _{1, parallel,} Z _1, first color chromaticity coordinates of which are defined by _{parallel, X 2, parallel, Y} 2, parallel, Z 2, parallel Created by plotting the chromaticity coordinates of the second color determined by X and the chromaticity coordinates of the _third color defined by X _{3, parallel} , Y _{3, parallel} and Z _{3, parallel} on the UCS chromaticity diagram of CIE 1976 The triangular area is preferably 70 to 215% of the triangular area created by plotting NTSC RGB chromaticity coordinates on the UCS chromaticity diagram.

In the photosensitive resin composition set of the present invention, the locus from the white display coordinates (u ′ _white , v ′ _white ) to the black display coordinates (u ′ _black , v ′ _black ) is preferably substantially parallel to the black body locus. In other words, the correlated color temperature of the black display coordinates (u ′ _black , v ′ _black ) is 5000 K or more and 25000 K or less.

The photosensitive resin composition set includes at least one photosensitive resin composition of a first color photosensitive resin composition, a second color photosensitive resin composition, and a third color photosensitive resin composition. When the white display coordinates (u ′ _white , v ′ _white ) and the black display coordinates (u ′ _black , v ′ _black ) as the photosensitive resin composition set are measured, these are the characteristics (1), preferably further The coloring material is adjusted to exhibit the other characteristics described above. For example, the coloring material may be adjusted by blending a coloring pigment with an average particle diameter adjusted, or the coloring material may be adjusted by combining the coloring pigment and the extender, and emits fluorescence with the coloring pigment. You may adjust a coloring material by using a component together.

  In the photosensitive resin composition set for color filters, at least one of the photosensitive resin composition of the first color, the photosensitive resin composition of the second color, and the photosensitive resin composition of the third color is used. The conductive resin composition preferably contains a color pigment. In this case, the photosensitive resin composition can further contain an extender pigment.

  In the photosensitive resin composition set for color filters, at least one of the photosensitive resin composition of the first color, the photosensitive resin composition of the second color, and the photosensitive resin composition of the third color is used. It is also preferred that the functional resin composition contains a component that emits fluorescence.

  In the present invention, a pattern obtained by developing the photosensitive resin composition of the first color, the second color, and the third color on a substrate sequentially in an arbitrary order, a color filter including the pattern, and A liquid crystal display device provided with the color filter is also included.

  Hereinafter, the present invention will be described by taking, as an example, a three-primary color photosensitive resin composition set including a red photosensitive resin composition, a green photosensitive resin composition, and a blue photosensitive resin composition. The photosensitive resin composition set is not limited to those of the three primary colors. That is, the present invention includes complementary colors such as cyan, magenta, and yellow, and those that are based on the three primary colors or the complementary colors while shifting the color.

  According to the color filter of the present invention, since the balance between the resin composition films is appropriately taken, the balance between the pixels when the color filter is made can be appropriately taken, and the color adjustment of the liquid crystal display is simple. It becomes. In particular, it can be preferably used as a color filter for television.

  According to the photosensitive resin composition set for a color filter and the adjustment method thereof according to the present invention, the composition is appropriately balanced in the photosensitive resin composition set. The balance can be appropriately taken, and the color adjustment of the liquid crystal display becomes simple. In particular, it can be preferably used for a color filter for television.

  And according to these this invention, the adjustment by the polarizing film in a liquid crystal display device and the adjustment for every color pixel can be reduced.

  The color filter according to the present invention has a plurality of resin composition films (details will be described later), and these resin composition films are photosensitive resin compositions in the following photosensitive resin composition set for color filters. Each product is formed into a film. This photosensitive resin composition set for a color filter is for displaying a color image by combining the transmitted light when used as a filter. For example, a red photosensitive resin composition (photosensitive material for the first color) is used. Resin composition), a green photosensitive resin composition (second color photosensitive resin composition), and a blue photosensitive resin composition (third color photosensitive resin composition). And this photosensitive resin composition set satisfies the following characteristics (1). In addition to the property (1), the photosensitive resin composition set preferably further satisfies any of the properties (2) to (8) or any combination thereof. .

Characteristics (1)
Each color photosensitive resin composition is formed into a film and sandwiched between a pair of polarizing plates. The polarizing film is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where the polarizing axes are orthogonal to each other. When the tristimulus values “X, Y, Z” are measured, the white display coordinates (u ′ _white , v ′ _white ) and the black display coordinates (u ′ _black , v ′ _black ) determined by the following formula are coordinates P ₁ (0 .18, 0.52), coordinates Q ₁ (0.25, 0.52), coordinates R ₁ (0.23, 0.42), coordinates S ₁ (0.15, 0.42) Be within the range of the connecting straight line (see FIG. 2).

u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the above formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values obtained by the following formula.

X _white = (X _{red, parallel} + X _{green, parallel} + X _{blue, parallel} ) / 3
Y _white = (Y _{red, parallel} + Y _{green, parallel} + Y _{blue, parallel} ) / 3
Z _white = (Z _{red, parallel} + Z _{green, parallel} + Z _{blue, parallel} ) / 3
X _black = (X _{red, orthogonal} + X _{green, orthogonal} + X _{blue, orthogonal} ) / 3
Y _black = (Y _{red, orthogonal} + Y _{green, orthogonal} + Y _{blue, orthogonal} ) / 3
Z _black = (Z _{red, orthogonal} + Z _{green, orthogonal} + Z _{blue, orthogonal} ) / 3
“X _{red, parallel} , Y _{red, parallel} , Z _{red, parallel} ” is a tristimulus value “of transmitted light when a red (first color) film is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. The measurement results when X, Y, Z "are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight are shown. “X _{green, parallel} , Y _{green, parallel} , Z _{green, parallel} ” and “X _{blue, parallel} , Y _{blue, parallel} , Z _{blue, parallel} ” are green systems (second color) when the polarization axes are parallel to each other ) And blue (third color) film tristimulus values “X, Y, Z” are values measured in the same manner as the red film. "X _{red, orthogonal} , Y _{red, orthogonal} , Z _{red, orthogonal} ", "X _{green, orthogonal} , Y _{green, orthogonal} , Z _{green, orthogonal} ", "X _{blue, orthogonal} , Y _{blue, orthogonal} , Z _{blue, orthogonal} " Is a value obtained by measuring the tristimulus values “X, Y, Z” of the red film, the green film, and the blue film when the polarization axes are orthogonal to each other in the same manner as in the parallel case. Indicates.

The characteristic (1) will be described in more detail. The tristimulus values “X, Y, Z” are determined by the Commission Internationale del'Eclairage (CIE). The white coordinates (u ′ _white , v ′ _white ) and the black coordinates (u ′ _black , v ′ _black ) are coordinates (u ′, v ′) in a UCS (uniform chromaticity scale) chromaticity diagram defined by the CIE in 1976. ). The white display coordinates (u ′ _white , v ′ _white ) are obtained when the red film transmission light, the green film transmission light, and the blue film transmission light are mixed evenly when the polarization axes are parallel (white display). The black display coordinates (u ′ _black , v ′ _black ) correspond to the red film transmission light, the green film transmission light, and the blue film transmission when the polarization axes are orthogonal to each other. It corresponds to the color coordinates when light is mixed evenly (displayed in black).

  When the photosensitive resin composition set exhibiting the above characteristic (1) is used, the balance between white display and black display is appropriate at the stage of the color filter, and from white display to black display. The shift in chromaticity is reduced, and the adjustment of the polarizing film and the adjustment for each color pixel can be reduced in the liquid crystal display device.

The white display coordinates (u ′ _white , v ′ _white ) and the black display coordinates (u ′ _black , v ′ _black ) are preferably coordinates P ₂ (0.18, 0.51), coordinates Q ₂ (0.24, 0.51), the coordinates R ₂ (0.22, 0.43), and the coordinates S ₂ (0.16, 0.43) are within the range of a straight line connecting the four coordinates, more preferably the coordinates P ₃ (0 .19, 0.51), coordinates Q ₃ (0.23, 0.51), coordinates R ₃ (0.21, 0.44), coordinates S ₃ (0.17, 0.44) It is within the range of the connecting straight line (see FIG. 2).

From the viewpoint of simplifying prevention of chromaticity deviation, the distance between coordinates = [(u ′ _black −u ′ _white ) ² + (v ′ _black −v ′ _white ) ² ] ^0.5 is desirable as it is shorter, but the color of black display When increasing the temperature, it is recommended that the distance between coordinates is not too short. In this case, it is recommended that the inter-coordinate distance is about 1 × 10 ⁻³ or more, preferably about 5 × 10 ⁻³ or more, and more preferably about 10 × 10 ⁻³ or more.

  The photosensitive resin composition set of the present invention preferably further has the following property (2).

Characteristic (2)
Characteristics (1) and the same way white display coordinates (u _'white, v' _white) and black display coordinates _{(u 'black, v' black} ) when asked for, the white display coordinates (u _'white, v' _white ) And the black display coordinates (u ′ _black , v ′ _black ) (the locus on the CIE 1976 UCS chromaticity diagram) should be substantially parallel (including completely parallel) to the black body locus.

  When the photosensitive resin composition set exhibits this characteristic (2), prevention of chromaticity deviation is further simplified.

  Moreover, the photosensitive resin composition set of this invention may be equipped with the following characteristic (3) instead of the said characteristic (2) with the said characteristic (2).

Characteristic (3)
When the black display coordinates (u ′ _black , v ′ _black ) are obtained in the same manner as the characteristic (1), the correlated color temperature of the black display coordinates (u ′ _black , v ′ _black ) is 5000 K or higher, preferably 5500 K or higher. More preferably, it is 6000K or more. The correlated color temperature is often about 25000K or less (particularly 20000K or less).

The conventional photosensitive resin composition set is set so as to have the highest contrast. When such a photosensitive resin composition set is used, black display coordinates (u ′ _black , v ′ _black ) are displayed in white. When viewed from the coordinates (u ′ _white , v ′ _white ), the color shifts greatly in the purple direction (direction approximately orthogonal to the black body locus), and the correlated color temperature of the black display coordinates (u ′ _black , v ′ _black ) does not increase. If the resin composition set having the characteristic (3) is used, the correlated color temperature of the black display coordinates can be improved.

In addition, the photosensitive resin composition set of this invention does not have a worry that the brightness _| luminance _Ywhite falls compared with the conventional photosensitive resin composition set.

  Moreover, it is preferable that the photosensitive resin composition set of this invention is further equipped with the following characteristic (4) and / or characteristic (5).

Characteristic (4)
When the chromaticity coordinates of the standard light C (CIE Standard illuminant C) defined by the CIE (International Commission on Illumination) are (u ′ _C , v ′ _C ), the following coordinate distance d _C = [(u ′ _C− u ′ _white ) ² + (v ′ _C −v ′ _white ) ² ] ^0.5 + [(u ′ _C −u ′ _black ) ² + (v ′ _C −v ′ _black ) ² ] ^0.5
The inter-coordinate distance d _C calculated by is 75 × 10 ⁻³ or less. Here, (u ′ _C , v ′ _C ) = (0.200886, 0.460892).

Characteristic (5)
If the chromaticity coordinates of the standard light D ₆₅ (CIE Standard illuminant D ₆₅ ) determined by the CIE (International Commission on Illumination) are (u ′ _D65 , v ′ _D65 ), the following formula: Inter-coordinate distance d _D65 = [( u ′ _D65 −u ′ _white ) ² + (v ′ _D65 −v ′ _white ) ² ] ^0.5 + [(u ′ _D65 −u ′ _black ) ² + (v ′ _D65 −v ′ _black ) ² ] ^0.5
The inter-coordinate distance d _D65 calculated by the above is 60 × 10 ⁻³ or less. Here, (u ′ _D65 , v ′ _D65 ) = (0.197845, 0.468369).

  When these characteristics (4) and (5) are provided, the chromaticity shift is further reduced from the white display to the black display.

  Moreover, it is preferable that the photosensitive resin composition set of this invention is equipped with the following characteristics (6) and / or (7).

Characteristic (6)
Reciprocal correlated color temperature of standard light C (CIE Standard illuminant C) determined by CIE (International Commission on Illumination) is R _C, and reciprocal correlated color temperature corresponding to white display coordinates (u ' _white , v' _white ) _Is R _white, and the reciprocal correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black , (| R _white −R _C | + | R _black −R _C |) ≦ 90 MK ⁻¹ is satisfied. Wherein, R _C [MK ^-1] is ⁼ 106/6774.

Characteristic (7)
The inverse correlation color temperature of standard light D ₆₅ (CIE Standard illuminant D ₆₅ ) established by the CIE (International Lighting Commission) is R _D65, and the inverse correlation corresponding to the white display coordinates (u ' _white , v' _white ) When the color temperature is R _white and the reciprocal correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black , (| R _white −R _D65 | + | R _black −R _D65 | ) ≦ 90 MK ⁻¹ is satisfied.
Wherein, R _D65 [MK ^-1] is ⁼ 106/6504.

In the characteristics (6) and (7), the reciprocal correlated color temperatures R _white and R _black corresponding to each chromaticity coordinate are first obtained as a correlated color temperature corresponding to the chromaticity coordinate, and the reciprocal of this correlated color temperature is 10. It can be easily obtained by multiplying ⁶ . The correlated color temperature can be easily obtained from each chromaticity coordinate by a known diagram or approximate expression, or can be easily obtained by the following expression through the tristimulus values X, Y, and Z.

Here, the reciprocal correlated color temperature is a value obtained by dividing 10 ⁶ by the correlated color temperature, and it is said that a difference in color temperature can be identified if it differs by about 5.5 MK ⁻¹ . Here, the correlated color temperature can be obtained by the following equation.

T = −437n ³ + 3601n ² −6861n + 5514.31
In the above formula, n is a value determined by the formula n = (x−0.332) / (y−0.1858). The x and y are values obtained by the following formula based on the tristimulus values “X, Y, Z”.

x = X / (X + Y + Z)
y = Y / (X + Y + Z)
The smaller the reciprocal correlated color temperature difference is, the easier it is to prevent chromaticity deviation.

  When these characteristics (6) and (7) are provided, the chromaticity shift is further reduced from the white display to the black display.

  Moreover, it is preferable that the photosensitive resin composition set of this invention is equipped with the following characteristics (8).

Characteristic (8)
Red chromaticity coordinates defined by X _{red, parallel} , Y _{red, parallel} , Z _{red, parallel} , _green chromaticity coordinates defined by X _{green, parallel} , Y _{green, parallel} , Z _{green, parallel} , and X _blue, The area of the triangle created by plotting the blue chromaticity coordinates defined by _parallel , Y _{blue, parallel} and Z _{blue, parallel} on the UCS chromaticity diagram of CIE 1976 is the RGB color of NTSC (National Television System Committee) Is 70 to 215%, preferably 80 to 180% with respect to the area of the triangle created by plotting the chromaticity coordinates on the UCS chromaticity diagram (see FIG. 3).

Here, the chromaticity coordinates (u ′, v ′) of each color are
u ′ = 4X / (X + 15Y + 3Z)
v ′ = 9Y / (X + 15Y + 3Z)
It can ask for.

  With such a characteristic (8), a color display device such as a liquid crystal television display having extremely good color reproducibility can be provided.

  A photosensitive resin composition set (a set of a red photosensitive resin composition, a green photosensitive resin composition, and a blue photosensitive resin composition) exhibiting the above characteristics (1) to (8) is: It can be obtained by adjusting a coloring material or the like of at least one photosensitive resin composition according to the remaining photosensitive resin composition.

Specifically, for example, a photosensitive resin composition of each color is formed to obtain a resin composition film of each color, the resin composition film is sandwiched between a pair of polarizing plates, and the polarizing axes of the polarizing plates are parallel to each other. The tristimulus values “X, Y, Z” of the CIE (International Commission on Illumination) 1931 color system are measured for each color resin composition film separately for each case and the white display coordinates (u ' _white , v' _white ) and black display coordinates (u ' _black , v' _black ) are obtained by the above formula, red chromaticity coordinates (chromaticity) corresponding to the first color, and green corresponding to the second color Without changing the chromaticity coordinates (chromaticity) and the blue chromaticity coordinates (chromaticity) corresponding to the third color, at least one of the distances between the white display coordinates and the black display coordinates is reduced. The components of the photosensitive resin composition may be adjusted. Each chromaticity coordinate is determined in the same manner as in the characteristic (8). Although the adjustment method of a component is not specifically limited, For example, the change of the kind of coloring pigment, the change of the compounding ratio of a coloring pigment, etc. are mentioned.

  It is also suitable to adjust by the following method. Specifically, this adjustment method includes a film forming process, a measurement process, a contrast acquisition process, and an adjustment process.

  In the film forming step, the photosensitive properties of each color of the photosensitive resin composition set for a color filter having the photosensitive resin composition of the first color, the photosensitive resin composition of the second color, and the photosensitive resin composition of the third color. A resin composition film is formed to obtain a resin composition film of each color.

  In the measurement process, the resin composition film is sandwiched between a pair of polarizing plates, and each of the resin composition films of each color is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where they are orthogonal to each other. Meeting) Measure Y in the tristimulus values “X, Y, Z” of 1931 color system.

In the contrast acquisition step, the contrasts T _red , T _green , and T _blue for each resin composition film are expressed as follows: T _red = Y _{red, parallel} / Y _{red, orthogonal}
T _green = Y _{green, parallel} / Y _{green, orthogonal}
T _blue = Y _{blue, parallel} / Y _{blue, orthogonal}
Get by.

  Finally, in the adjustment step, the chromaticity coordinates (chromaticity) of red as the first color, the chromaticity coordinates (chromaticity) of green as the second color, and the chromaticity coordinates of blue (chromaticity) as the third color ), At least one of the components of the photosensitive resin composition is adjusted so as to improve the contrast balance between the resin composition films. Each chromaticity coordinate is determined in the same manner as in the characteristic (8).

  Specifically, adjustment of the component includes adjustment of the coloring material in the photosensitive resin composition, addition of extender pigment to the photosensitive resin composition, addition of a fluorescent component to the photosensitive resin composition, and the like. It is done.

  More specifically, for example, after adjusting at least one coloring material of the photosensitive resin composition X so as to exhibit the above characteristic (1), the characteristics (2) to (8) are exhibited as necessary. Thus, the coloring material of at least one photosensitive resin composition Y is adjusted. The photosensitive resin composition X and the photosensitive resin composition Y to be adjusted may be the same or different.

  Various methods for adjusting the coloring material can be mentioned and are not particularly limited. For example, it is recommended to adjust (prepar) the coloring material so as to balance the contrast between the photosensitive resin compositions. The If the contrast is balanced, the above characteristics (1) to (8) can be achieved.

  In order to balance the contrast, various methods can be employed depending on the type of the coloring material. For example, when the coloring material is composed of at least a coloring pigment, the contrast may be balanced by adjusting the average particle diameter of the coloring pigment, or the contrast of the coloring material and the extender pigment (uncolored pigment) may be adjusted. A balance may be taken, and contrast may be balanced by adding a component that emits fluorescence in addition to the color pigment. Even when the coloring material is composed of only a coloring dye, the contrast can be balanced by adding a fluorescent component. In addition, any one may be employ | adopted for adjustment of the said average particle diameter, combined use of an extender pigment, and the combined use of the component which emits fluorescence, and you may employ | adopt combining several appropriately. Hereinafter, each means will be described in more detail.

[Adjustment of average particle size]
In the conventional photosensitive resin composition set aiming at making the contrast as high as possible, the average particle diameter of each color is small, but the contrast is increased by using a color pigment having a relatively large average particle diameter. Can be balanced. Specifically, for example, for the photosensitive resin composition corresponding to the film having the highest contrast, the average particle diameter of the colored pigment is increased. Thereby, since the contrast of the resin composition film formed by forming the photosensitive resin composition is lowered, it is possible to balance the contrast between the films. If the average particle size becomes too large, the overall contrast when used as a color filter is significantly reduced. Therefore, the contrast between the resin compositions (between pixels) and the overall contrast when used as a color filter. It is recommended to adjust the average particle diameter within a range where both can be satisfied.

On the other hand, from the viewpoint of increasing the contrast T _all (described later) of the entire color filter, it is extremely preferable to reduce the average particle diameter of the color pigment of the photosensitive resin composition corresponding to the film having the lowest contrast. If it carries out like this, the contrast of the photosensitive resin composition film formed by film-forming the photosensitive resin composition will improve, and it can balance the contrast between each film by this.

  In order to adjust the average primary particle size, it is easy to mix color pigments having different average particle sizes [which may have the same color index (CI) number]. The average particle size is also appropriately set according to which of the composition characteristics (1) to (8) is achieved, whether or not the extender pigment or the fluorescent component is used in combination, the number of color pigments to be mixed, and the like. For example, when two color pigments are mixed, a color pigment having an average particle size of about 50 to 200 nm (preferably about 53 to 150 nm, more preferably about 55 to 100 nm) and an average particle size of about 100 to 300 nm ( It is often mixed with a coloring pigment of preferably about 105 to 200 nm, more preferably about 110 to 150 nm.

  The average particle diameter means the average of the minor axis length and major axis length of the particles. Specifically, 50 pigment particles are randomly selected from a photograph taken using a transmission electron microscope, and the average of the short axis length and the average of the long axis lengths of these selected particles are obtained. It can be obtained by calculating the average of the average major axis length.

[Combination of extender pigments (uncolored pigments)]
In the conventional photosensitive resin composition set for the purpose of increasing the contrast as much as possible, the combination of extender pigments that lower the contrast has not been performed, but the balance of contrast is achieved by using the extender pigments in combination. be able to. Specifically, for example, an extender pigment may be added to the photosensitive resin composition corresponding to the film having the highest contrast. Thereby, since the contrast of the resin composition film formed by forming the photosensitive resin composition is lowered, it is possible to balance the contrast between the films. At this time, in order to exhibit the effect of the extender, the photosensitive resin composition to which the extender is added preferably contains a color pigment.

  The particle size of the extender pigment can be selected from particle sizes that cause Mie scattering. For example, when incorporated into a green composition, it is 100 nm or more (preferably 150 nm or more, more preferably 200 nm or more), 400 nm or less. (Preferably 300 nm or less, more preferably 280 nm or less).

  The amount of the extender pigment depends on which of the composition characteristics (1) to (8) is achieved, whether the average particle size is adjusted, whether or not a fluorescent component is used in combination, the particle size of the extender pigment, and the like. Depending on the amount of solid pigment in the resin composition, the blending amount of the extender is, for example, 0.01% or more (preferably 0.015% or more, more preferably 0.05%). In many cases, it is selected from a range of about 02% or more. If the amount of extender pigment is too large, the overall contrast when used as a color filter is significantly reduced. Therefore, the contrast balance between resin compositions (between pixels) and the total when used as a color filter are reduced. It is recommended to set the upper limit of the amount of extender pigment within the range in which both contrasts can be achieved. The amount of the extender is, for example, about 0.1% or less (preferably 0.08% or less, more preferably 0.05% or less) when the solid content in the resin composition is 100 parts by mass. There are many.

  As the extender pigment, various known extender pigments can be used. For example, non-colored inorganic pigments (aluminum oxide, titanium dioxide, etc.) can be used.

[Fluorescent component]
In the conventional photosensitive resin composition set for the purpose of making the contrast as high as possible, no component that emits fluorescence is used, but the contrast can be balanced by using the component that emits fluorescence together. Specifically, for example, a component that emits fluorescence may be added to the photosensitive resin composition corresponding to the film having the highest contrast. Thereby, since the contrast of the resin composition film formed by forming the photosensitive resin composition is lowered, it is possible to balance the contrast between the films.

  Examples of the fluorescent component include fluorescent pigments and fluorescent dyes. Fluorescent pigments can be dye-type, resin-type, and the like. Examples of dye-type pigments include azo dye pigments, phthalocyanine dye pigments, anthraquinone dye pigments, quinacridone dye pigments, and isoindolinone dye pigments. Thioindigo dye pigments, perylene dye pigments, and dioxazine dye pigments (preferably azo dye pigments and isoindolinone dye pigments). Preferred fluorescent pigments of the dye type are C.I. I. Pigment yellow 139, 185 and the like.

  As the resin type, one in which a fluorescent dye is dispersed or dissolved in a resin matrix can be used. Examples of the thermosetting resin include urea resin, melamine resin, benzoguanamine resin, acrylic resin, vinyl chloride resin, alkyd resin, allyl sulfone resin, and phenol resin. A preferred resin-type fluorescent pigment is one in which a fluorescent dye is dissolved in a matrix of a thermosetting resin. Examples of resin-soluble fluorescent dyes include xanthene dyes such as rhodamine B and rhodamine 6G, and cyanine dyes such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostillin) -4H-pyran (CMD). Pyridine dyes such as 1-ethyl-2- (4- (p-dimethylaminophenyl) -1,3-butadienyl) pyridium-percollate (pyridine 1), oxazine dyes, chrysene dyes, thioflavine dyes, perylene Dyes, pyrene dyes, anthracene dyes, acridone dyes, acridine dyes, fluorene dyes, terphenyl dyes, ethene dyes, butadiene dyes, hexatriene dyes, oxal dyes, coumarin dyes, stilbenes Dyes, di- and triphenylmethane dyes, thiazoles Dyes, thiazine-based dyes, naphthalimide dyes, and anthraquinone dyes. Preferred fluorescent dyes are xanthene dyes such as rhodamine B and rhodamine 6G, coumarin dyes, naphthalimide dyes, and the like.

  The amount of the component that emits fluorescence depends on which of the composition characteristics (1) to (8) is achieved, whether the average particle diameter is adjusted, whether the extender is used in combination, the type of the component that emits fluorescence From the range of about 0.05 parts by mass or more (preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more). There are many choices. If the amount of the fluorescent component is too large, the overall contrast of the color filter is significantly reduced, so the contrast balance between the resin compositions (pixels) and the color filter It is recommended to set the upper limit of the amount of the component that emits fluorescence within the range in which the overall contrast of the above can be achieved. The amount of the component that emits fluorescence is often about 3 parts by mass or less (preferably 2 parts by mass or less, more preferably 1.5 parts by mass or less) when the entire coloring component is 100 parts by mass. .

  Each photosensitive resin composition (red photosensitive resin composition, green photosensitive resin composition, blue photosensitive resin composition) used in the present invention is a pigment except that it has the above characteristics. It may have the same characteristics as a known dispersed photosensitive resin composition for resist formation, and is usually a coloring material (especially a coloring pigment, which may contain a dye), a binder resin, and a photopolymerizable property. A compound, a photopolymerization initiator, and other additives as necessary are blended. In addition, as mentioned above, in the photosensitive resin composition of this invention, the extender pigment may be mix | blended and the component which emits fluorescence may be mix | blended. Each of these components is dissolved or dispersed in a solvent.

  Examples of the colored pigment include organic pigments (hereinafter referred to as colored organic pigments), inorganic pigments (hereinafter referred to as colored inorganic pigments), and the like, and those commonly used for pigment dispersion resists can be easily used. In general, metal compounds such as metal oxides and metal complex salts are used as inorganic pigments. Specifically, iron, cobalt, aluminum, cadmium, lead, copper, titanium, magnesium, chromium, zinc, antimony, etc. A metal oxide or a composite metal oxide is exemplified, and among these, a colored one is used as a colored inorganic pigment.

Examples of the colored organic pigment include compounds classified as Pigment by Color Index (published by The Society of Dyers and Colorists). Specific examples include compounds having the following color index (C.I.) numbers, but are not limited thereto.

C. I. Pigment Yellow 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 180 and 185, etc. ;
C. I. Pigment orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65 and 71;
C. I. Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 180, 192, 215, 216, 224, 242, 254, 255 and 264, etc .;
C. I. Pigment violet 14, 19, 23, 29, 32, 33, 36, 37 and 38;
C. I. Pigment blue 15 (such as 15: 3, 15: 4, 15: 6), 21, 22, 28, 60, 64 and 76;
C. I. Pigment Green 7, 10, 15, 25, 36 and 47 etc .; C.I. I. Pigment brown 28, etc .;
C. I. Pigment Black 1 and 7, etc.

  The coloring material containing the said color pigment can be used individually or in combination of 2 or more types, respectively. The coloring material is generally used in the range of 5 to 60% by mass, preferably 10 to 55% by mass, based on the total solid content in the photosensitive resin composition. If the coloring material is within the predetermined range, even if it is a thin film, the color density of the pixel is sufficient, and the loss of non-pixel portions does not deteriorate during development, so that there is a tendency for residues to hardly occur, preferable.

  As the binder resin, those having alkali solubility and acting as a dispersion medium for the coloring material can be used. Preferred binder resins include polymers having unsaturated carboxylic acids (which are meant to include acid anhydrides) as constituent monomers, and copolymers of unsaturated carboxylic acids are particularly preferred.

  As the unsaturated carboxylic acids, for example, acrylic acid, methacrylic acid and the like are preferably used. These acrylic acid and methacrylic acid can be used alone or in combination. In addition to these acrylic acid and methacrylic acid, other unsaturated carboxylic acids (or acid anhydrides thereof) such as crotonic acid, itaconic acid, maleic acid and fumaric acid may be used in combination. Furthermore, monomers having a hydroxyl group and a carboxyl group in the same molecule such as α- (hydroxymethyl) acrylic acid can be used in combination.

  The abundance of the structural unit derived from the unsaturated carboxylic acid in the binder resin is usually 10 to 50% by mass, preferably about 15 to 40% by mass. If the structural unit derived from unsaturated carboxylic acids is within the predetermined range, the solubility in the developer is sufficient, so that no residue is generated on the unexposed portion of the substrate, and the exposed portion during development. This is preferable because the film thickness of the pixel portion does not decrease and the entire pixel does not peel off.

As a monomer which comprises a copolymer with the said unsaturated carboxylic acids, (meth) acrylic acid ester is mentioned, for example. Specific examples of the (meth) acrylic acid ester include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, benzyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate and aminoethyl ( Substituted or unsubstituted alkyl esters of (meth) acrylic acid such as (meth) acrylate;
Cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, methylcyclohexyl (meth) acrylate, cycloheptyl (meth) acrylate, cyclooctyl (meth) acrylate, menthyl (meth) acrylate, cyclopentenyl (meth) acrylate, cyclohexenyl (meta) ) Acrylate, cycloheptenyl (meth) acrylate, cyclooctenyl (meth) acrylate, mentadienyl (meth) acrylate, cyclopentadienyl (meth) acrylate, isobornyl (meth) acrylate, pinanyl (meth) acrylate, tricyclodecyl (meth) acrylate, Tricyclodecyloxyethyl (meth) acrylate, adamantyl (meth) acrylate, norbornenyl (meth) acrylate Pinenyl (meth) acrylate, dicyclopentenyl (meth) having an alicyclic group such as acrylate and dicyclopentenyl oxyethyl (meth) acrylate (meth) acrylic acid ester;
(Meth) acrylic acid ester having a chain ether group such as oligoethylene glycol monoalkyl (meth) acrylate;
Examples include (meth) acrylic acid esters having a cyclic ether group such as glycidyl (meth) acrylate and oxetane (meth) acrylate. Preferred monomers include unsubstituted or substituted alkyl esters of (meth) acrylic acid and (meth) acrylic acid esters having an alicyclic group, particularly methyl (meth) acrylate and benzyl (meth) acrylate.

In addition, as a monomer which comprises a copolymer with the said unsaturated carboxylic acids, although (meth) acrylic acid ester is preferable, it replaces with this (meth) acrylic acid ester or it replaces with this (meth) acrylic acid ester, and other monomers May be used. Such other monomers include aromatic vinyl compounds such as styrene, α-methylstyrene, vinyltoluene;
Carboxylic acid vinyl esters such as vinyl acetate and vinyl propionate;
Vinyl cyanide compounds such as (meth) acrylonitrile and α-chloroacrylonitrile;
And maleimide compounds such as N-phenylmaleimide. These other monomers can be used alone or in combination of two or more.

  The polystyrene-reduced weight average molecular weight of the binder resin is, for example, 5,000 to 100,000, preferably 7,000 to 100,000, more preferably 7,000 to 50,000, and particularly preferably 7,000 to 30,000. 000 is desirable. When the weight average molecular weight of the binder resin is within the predetermined range, film loss is unlikely to occur during development, and the non-pixel portion is liable to be easily removed during development.

  The binder resin is usually contained in the range of 5 to 90% by mass, preferably 10 to 70% by mass with respect to the total solid content in the photosensitive resin composition. When the amount of the binder resin is within the predetermined range, the solubility in the developer is sufficient, development residue is hardly generated on the substrate of the non-pixel portion, and the film thickness of the pixel portion of the exposed portion is reduced during development. The non-pixel portion has a tendency to be easily removed and is preferable.

  The photopolymerizable compound is not particularly limited as long as it can be polymerized by the action of light and a photopolymerization initiator described later. For example, a monofunctional monomer, a bifunctional monomer, a trifunctional or higher monomer, and the like can be used.

  Examples of the monofunctional monomer include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, N-vinyl pyrrolidone and the like.

  Bifunctional monomers include 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, bisphenol A bis (acrylic). Leuoxyethyl) ether, 3-methylpentanediol di (meth) acrylate, and the like.

  Examples of the tri- or higher functional monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa (meth) acrylate. Etc.

  A preferred photopolymerizable compound is a bifunctional or higher monomer.

  The photopolymerizable compound is usually contained in the range of 1 to 60 parts by mass, preferably 5 to 50 parts by mass with respect to 100 parts by mass in total of the binder resin and the photopolymerizable compound in the photosensitive resin composition. When the amount of the photopolymerizable compound is within the above range, the strength and smoothness of the pixel portion tend to be good, which is preferable.

  As the photopolymerization initiator, an initiator system comprising at least one of a triazine compound, a ketone compound (such as an acetophenone compound) or a derivative thereof, a biimidazole compound, an oxime compound, and a polyfunctional thiol compound is preferably used. The photosensitive resin composition obtained by using these initiators has high sensitivity, and the formed film has good strength and surface smoothness of the pixel portion. The photopolymerization initiator may be used alone or in combination.

  Examples of the triazine compound include 2,4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4- Methoxynaphthyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6-piperonyl-1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4-methoxy Styryl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (5-methylfuran-2-yl) ethenyl] -1,3,5-triazine, 2,4 -Bis (trichloromethyl) -6- [2- (furan-2-yl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (4-diethylamino- 2-methylphenyl) Sulfonyl] -1,3,5-triazine, such as 2,4-bis (trichloromethyl) -6- [2- (3,4-dimethoxyphenyl) ethenyl] -1,3,5-triazine.

  Examples of the ketone compound or derivative thereof include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, 2-hydroxy-1- [4- (2-hydroxyethoxy). ) Phenyl] -2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2- (4-methylbenzyl) 2-morpholino-1- (4-methylthiophenyl) propan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butan-1-one, 2-hydroxy-2-methyl- Examples include oligomers of 1- [4- (1-methylvinyl) phenyl] propan-1-one.Further, 2-octanedione, 1- [4- (phenylthio) phenyl]-, 2- (o-benzoyloxime), and the like can be used.

  Examples of the biimidazole compound include 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenylbiimidazole and 2,2′-bis (2,3-dichlorophenyl). 4,4 ′, 5,5′-tetraphenylbiimidazole [see, for example, JP-A-9-197118 (Patent Document 3) and JP-A-2001-116918 (Patent Document 5)], 2,2′- Bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenylbiimidazole, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetra (alkoxyphenyl) bi Imidazole, 2,2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetra (dialkoxyphenyl) biimidazole, 2,2'-bis (2-chlorophenyl)- , 4 ′, 5,5′-tetra (trialkoxyphenyl) biimidazole (see, for example, JP-A-6-75372 and JP-A-6-75373), phenyl group at the 4,4′5,5′-position Is an imidazole compound substituted with a carboalkoxy group (see Japanese Patent Publication No. 48-38403). Preferred biimidazole compounds are 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenylbiimidazole, 2,2′-bis (2,3-dichlorophenyl) -4,4. ', 5,5'-tetraphenylbiimidazole and the like.

  Examples of the oxime compound include O-acyloxime compounds. Specific examples thereof include 1- (4-phenylsulfanyl-phenyl) -butane-1,2-dione 2-oxime-O-benzoate, 1- (4-phenylsulfanyl-phenyl) -octane-1,2-dione 2-oxime-O-benzoate, 1- (4-phenylsulfanyl-phenyl) -octane-1-one oxime-O-acetate, 1- (4 -Phenylsulfanyl-phenyl) -butan-1-one oxime-O-acetate and the like.

  The polyfunctional thiol compound is a compound having a plurality of thiol groups in the molecule, and an aliphatic polyfunctional thiol compound in which a thiol group is bonded to an aliphatic carbon is particularly preferable. Examples of the aliphatic polyfunctional thiol used in the present invention include hexanedithiool, decanedithiol, 1,4-dimethylmercaptobenzene, and the like; butanediol bisthiopropionate, butanediol bisthioglycolate, ethylene glycol Bisthioglycolate, trimethylolpropane tristhioglycolate, butanediol bisthiopropionate, trimethylolpropane tristhiopropionate, trimethylolpropane tristhioglycolate, pentaerythritol tetrakisthiopropionate, pentaerythritol Examples thereof include polyvalent thioglycolates or polyvalent thiopropionates of polyvalent hydroxy compounds such as tetrakisthioglycolate and trishydroxyethyltristhiopropionate. Preferred aliphatic polyfunctional thiols include trimethylolpropane tristhiopropionate, trimethylolpropane tristhioglycolate, pentaerythritol tetrakisthiopropionate and the like, especially pentaerythritol tetrakisthiopropionate.

  Moreover, as long as the effect of the present invention is not impaired, a photopolymerization initiator or the like usually used in this field can be used in combination. For example, benzoin-based, benzophenone-based, thioxanthone-based, anthracene-based, and other Initiators are mentioned. These other initiators can be used alone or in combination of two or more.

  Examples of the benzoin photopolymerization initiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

  Examples of the benzophenone photopolymerization initiator include benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4′-methyldiphenyl sulfide, 3,3 ′, 4,4′-tetra (tert- Butyl peroxycarbonyl) benzophenone, 2,4,6-trimethylbenzophenone and the like.

  Examples of the thioxanthone photopolymerization initiator include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, and the like.

  Examples of the anthracene photopolymerization initiator include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, and 2-ethyl-9,10-diethoxyanthracene. Can be mentioned.

  Other photopolymerization initiators include, for example, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,2′-bis (o-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1 , 2'-biimidazole, 10-butyl-2-chloroacridone, 2-ethylanthraquinone, benzyl, 9,10-phenanthrenequinone, camphorquinone, methyl phenylglyoxylate, titanocene compound, and the like.

  The photopolymerization initiator can also be used in combination with a photopolymerization initiation assistant. When a photopolymerization initiation assistant is used in combination, the resulting colored photosensitive resin composition has a higher sensitivity, and the productivity when forming a color filter using this composition is more preferred. Examples of the photopolymerization initiation assistant include amine compounds, alkoxyanthracene compounds, thioxanthone compounds, and the like, and these photopolymerization initiation assistants can be used alone or in combination of two or more.

  Examples of amine compounds include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, and 2-dimethylaminoethyl benzoate. 2-ethylhexyl 4-dimethylaminobenzoate, N, N-dimethylparatoluidine, 4,4′-bis (dimethylamino) benzophenone (commonly known as Michler's ketone), 4,4′-bis (diethylamino) benzophenone, 4,4 ′ -Bis (ethylmethylamino) benzophenone is mentioned, among which 4,4'-bis (diethylamino) benzophenone is preferred.

  Examples of the alkoxyanthracene compound include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 2-ethyl-9,10-diethoxyanthracene and the like. .

  Examples of the thioxanthone compound include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, and the like.

  Moreover, a commercially available thing can also be used as a photoinitiation adjuvant, for example, brand name "EAB-F" (made by Hodogaya Chemical Co., Ltd.) etc. are mentioned.

  As a combination of a photopolymerization initiator and a photopolymerization initiation assistant, diethoxyacetophenone / 4,4′-bis (diethylamino) benzophenone, 2-methyl-2-morpholino-1- (4-methylthiophenyl) propane-1- ON / 4,4′-bis (diethylamino) benzophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one / 4,4′-bis (diethylamino) benzophenone, benzyldimethyl ketal / 4,4′- Bis (diethylamino) benzophenone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl] propan-1-one / 4,4′-bis (diethylamino) benzophenone, 1-hydroxycyclohexyl phenyl ketone / 4,4'-bis (diethylamino) benzopheno 2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propan-1-one oligomer / 4,4′-bis (diethylamino) benzophenone, 2-benzyl-2-dimethylamino- 1- (4-morpholinophenyl) butan-1-one / 4,4′-bis (diethylamino) benzophenone, 2- (4-methylbenzyl) -2-morpholino-1- (4-methylthiophenyl) propane-1- ON / 4,4′-bis (diethylamino) benzophenone, 2-octanedione, 1- [4- (phenylthio) phenyl]-, 2- (o-benzoyloxime) / 4,4′-bis (diethylamino) benzophenone A combination thereof, and the like, preferably 2-methyl-2-morpholino-1- (4-methylthiophenyl) propane The combination of 1-one / 4,4'-bis (diethylamino) benzophenone.

The quantity of a photoinitiator is 0.1-40 mass parts normally with respect to 100 mass parts of total of binder resin and a photopolymerizable compound, Preferably it is about 1-30 mass parts. The amount of the photopolymerization initiation assistant is usually 0.1 to 50 parts by mass, preferably about 1 to 40 parts by mass with respect to 100 parts by mass in total of the binder resin and the photopolymerizable compound. When the amount of the photopolymerization initiator is within the above range, the colored photosensitive resin composition becomes highly sensitive, and the strength of the pixel portion formed using the colored photosensitive resin composition or the surface of the pixel is increased. There exists a tendency for smoothness to become favorable and is preferable. Moreover, when the amount of the photopolymerization initiation assistant is within the above range, the sensitivity of the obtained colored photosensitive resin composition is further increased, and the productivity of the color filter formed using the colored photosensitive resin composition is improved. It tends to improve, which is preferable.

As the solvent, various solvents used in this field can be used. Specifically, ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether;
Diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether;
Ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate;
Alkylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, methoxypentyl acetate;
Aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene;
Ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, cyclohexanone;
Alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, glycerin;
Esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate;
and cyclic esters such as γ-butyrolactone.

  These solvents can be used alone or in combination of two or more.

  The usage-amount of a solvent is 60-90 mass% normally on the basis of the quantity of the whole photosensitive resin composition containing this solvent, Preferably it is about 70-85 mass%. When the content of the solvent is within the above range, the coating property tends to be good, which is preferable.

  The photosensitive resin composition of the present invention may contain a plurality of additives (for example, fillers, polymer compounds, pigment dispersants, adhesion promoters, antioxidants, ultraviolet absorbers, anti-aggregation materials, etc.) as necessary. May be used.

  Examples of the filler include glass, silica, and alumina.

  Examples of the polymer compound include polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate and the like. Thermosetting resins such as epoxy resins, thermoplastic resins such as polyester and polyurethane can also be used.

  Commercially available surfactants can be used as the pigment dispersant, and examples thereof include silicone-based, fluorine-based, ester-based, cationic-based, anionic-based, nonionic-based, and amphoteric surfactants. The surfactants are used alone or in combination of two or more. Examples of the surfactant include polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyethylene glycol diesters, sorbitan fatty acid esters, fatty acid-modified polyesters, urethanes such as tertiary amine-modified polyurethanes, In addition to polyethyleneimines, etc., KP [manufactured by Shin-Etsu Chemical Co., Ltd.], Polyflow [manufactured by Kyoei Chemical Co., Ltd.], Ftop (manufactured by Tochem Products), Megafax [Dainippon Ink Chemical Industries Co., Ltd.], Florard [Sumitomo 3M Co., Ltd.], Asahi Guard, Surflon [Asahi Glass Co., Ltd.], Solsperse [Zeneca Co., Ltd.], EFKA (EFKA CHEMICALS Co., Ltd.), PB821 [Ajinomoto ( Etc.] can also be used.

  Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, and N- (2-amino). Ethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyl Examples include trimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, and 3-mercaptopropyltrimethoxysilane.

  Examples of the antioxidant include 2,2'-thiobis (4-methyl-6-tert-butylphenol), 2,6-di-tert-butyl-4-methylphenol, and the like.

  Examples of the ultraviolet absorber include 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole, alkoxybenzophenone and the like.

  As the flocculant, for example, sodium polyacrylate can be used.

  Each photosensitive resin composition (red photosensitive resin composition, green photosensitive resin composition, blue photosensitive resin composition) of the present invention can be prepared, for example, as follows. . That is, the coloring material is mixed with a solvent in advance, and is dispersed using a bead mill or the like until the average particle diameter of the coloring material is about 0.2 μm or less. At this time, part or all of the binder resin may be blended, and a pigment dispersant may be used as necessary. In the obtained dispersion (mill base), the remainder of the binder resin, the photopolymerizable compound, the photopolymerization initiator, and other components used as necessary, and further an additional solvent if necessary, with a predetermined concentration The desired photosensitive resin composition is obtained.

(Color filter)
The photosensitive resin composition set obtained as described above can be used as a color filter by developing each photosensitive resin composition on a substrate in an arbitrary order to form a pattern. That is, the color filter according to the present embodiment is formed by forming each photosensitive resin composition of the above-described photosensitive resin composition set into a predetermined shape. Specifically, for example, as shown in FIG. 4, the color filter 1 includes a substrate 3, a lattice-shaped black matrix BM having a plurality of openings formed on the substrate 3, and each of the black matrix BM. A transparent red resin composition film R, a transparent green resin composition film G, and a transparent blue resin composition film B are formed in order in the opening. The transparent red resin composition film R is obtained by forming the red photosensitive resin composition in the above-described photosensitive resin composition set for color filters into a desired shape, and the transparent green resin composition film G is described above. The green photosensitive resin composition in the set is formed into a predetermined shape, and the transparent blue resin composition film B is formed into a predetermined shape from the blue photosensitive resin composition in the above set. Is. Since such a color filter is formed using the above-mentioned photosensitive resin composition set, each resin composition film of this color filter satisfies the property of the resin composition film in the above-mentioned characteristic (1). Furthermore, each resin composition film of this color filter preferably satisfies at least one of the properties of the resin composition film in the above-mentioned properties (2) to (8) or a combination thereof.

  Here, as a method of developing each photosensitive resin composition on a substrate, that is, forming a film into a predetermined shape, a known or commonly used method can be employed as it is or appropriately modified, for example, as follows. Is desirable.

  That is, one photosensitive resin composition is spin-coated on a substrate (usually glass) and heat-dried (pre-baked) to remove the solvent and obtain a smooth coating film. At this time, the thickness of the coating film is about 1 to 3 μm. The coated film thus obtained is irradiated with ultraviolet rays through a negative mask for forming a desired image to cure the exposed area, and then the unexposed area is dissolved in a developer and developed. By performing the above operation in the same manner with respect to the remaining photosensitive resin composition, a resin composition film of each color as a target pixel (pattern) can be formed. As a coating method, a spin coating method is usually used, but a slit coating method or a slit-and-spin coating method can also be used.

  In the ultraviolet irradiation, it is preferable to use a device such as a mask aligner so that parallel light is uniformly irradiated on the entire exposed portion and the mask and the substrate are accurately aligned. Further, after development, post-curing (post-baking) can be performed at 150 to 230 ° C. for about 10 to 60 minutes as necessary.

  As the developer, a dilute alkaline solution (such as an aqueous solution containing an alkaline compound and a surfactant) is usually used. The alkaline compound may be either inorganic or organic. Examples of inorganic alkaline compounds include sodium hydroxide, potassium hydroxide, disodium hydrogen phosphate, sodium dihydrogen phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium silicate, potassium silicate, and carbonic acid. Sodium, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium borate, potassium borate, ammonia and the like can be mentioned.

  Examples of the organic alkaline compound include tetramethylammonium hydroxide, 2-hydroxyethyltrimethylammonium hydroxide, monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monoisopropylamine, diisopropylamine, and ethanolamine. It is done.

  These inorganic and organic alkaline compounds can be used alone or in combination of two or more. A preferred concentration of the alkaline compound in the developer is in the range of 0.01 to 10% by mass, and more preferably 0.03 to 5% by mass.

  The surfactant in the developer may be any of a nonionic surfactant, an anionic surfactant, or a cationic surfactant. Nonionic surfactants include, for example, polyoxyethylene derivatives such as polyoxyethylene alkyl ether, polyoxyethylene aryl ether, polyoxyethylene alkyl aryl ether; oxyethylene / oxypropylene block copolymers; sorbitan fatty acid esters, polyoxyethylene Examples include sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerin fatty acid ester, polyoxyethylene fatty acid ester, and polyoxyethylene alkylamine.

  Examples of the anionic surfactant include higher alcohol sulfates such as sodium lauryl alcohol sulfate and sodium oleyl alcohol sulfate; alkyl sulfates such as sodium lauryl sulfate and ammonium lauryl sulfate; sodium dodecylbenzenesulfonate and dodecylnaphthalenesulfone. And alkylaryl sulfonates such as sodium acid.

  Examples of the cationic surfactant include amine salts such as stearylamine hydrochloride and lauryltrimethylammonium chloride, or quaternary ammonium salts.

  These surfactants can be used alone or in combination of two or more.

The concentration of the surfactant in the developer is usually in the range of 0.01 to 10% by mass, preferably 0.05 to 8% by mass, and more preferably 0.1 to 5% by mass.

  Thus, the color filter manufactured from the photosensitive resin composition set of the present invention has a small in-plane film thickness difference, for example, a film thickness of 1 to 3 μm and an in-plane film thickness difference of 0.15 μm or less. Furthermore, it can be 0.05 μm or less. That is, the color filter of the present invention is excellent in smoothness and transparency, and an excellent quality liquid crystal panel can be produced with a high yield by incorporating it into a color liquid crystal display device.

  When a liquid crystal display device is formed using the color filter of the present invention, this color filter is manufactured from a specific photosensitive resin composition set, and the balance between the resin compositions (between pixels) is appropriately taken. Therefore, it is possible to easily prevent a chromaticity shift from white display to black display. And since the balance between resin compositions (between pixels) is appropriately taken, the color temperature of not only white display but also black display can be easily increased.

  As the backlight of the liquid crystal display device, a white light source can be advantageously employed. For example, a two-wavelength light source, a three-wavelength light source, or the like can be employed. Examples of the two-wavelength light source include an LED light source that emits white light by combining a blue LED (Light Emitting Diode) and a yellow phosphor or a yellow-green phosphor. As a three-wavelength type light source, a three-wavelength fluorescent tube (such as the light source shown in FIG. 1); a white LED light source that combines an ultraviolet LED and red, blue, and green phosphors; red, blue, and green LEDs Combined white LED light source; organic electroluminescence light source and the like. In addition to the above-described backlight, a C light source and a D light source defined by CIE can be used as the backlight.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the purpose described above and below. Of course, it is possible to implement them, and they are all included in the technical scope of the present invention.

  In the following examples,% and parts representing the content or amount used are based on mass unless otherwise specified.

［樹脂組成物の評価］
上記実験例で得られた樹脂組成物のセットとしての色特性を、以下のようにして求めた。 Experimental Examples 1-5
A resin composition set comprising a red photosensitive resin composition, a green photosensitive resin composition, and a blue photosensitive resin composition having the formulations shown in Tables 1 to 3 below was prepared. In each resin composition, the total amount of the color pigment, extender pigment, and pigment dispersant was mixed with a partial amount of propylene glycol monomethyl ether acetate as a solvent, and the color pigment was sufficiently dispersed using a bead mill. This dispersion was prepared by adding the remaining propylene glycol monomethyl ether acetate and the remaining ingredients and mixing them.

[Evaluation of resin composition]
The color characteristics as a set of resin compositions obtained in the above experimental examples were determined as follows.

[Tristimulus values]
A 2-inch (5.1 cm) square glass substrate (Corning “# 1737”) was washed with a neutral detergent, water and alcohol in order and then dried to dry the surface in advance.

The photosensitive resin composition (red photosensitive resin composition, green photosensitive resin composition, blue photosensitive resin composition) obtained in the experimental example was separately spin-coated on the glass substrate, and then in a clean oven A photosensitive colorant layer (color resist) was prepared by pre-baking at a temperature of 100 ° C. for 3 minutes. After cooling, the resist-coated substrate was irradiated with light at an exposure amount of 100 mJ / cm ² in an air atmosphere using an ultrahigh pressure mercury lamp (USHIO INC.). Thereafter, the coating film is immersed in an aqueous developer containing 0.12% of a nonionic surfactant and 0.04% of potassium hydroxide for a predetermined time at room temperature, developed, washed with water, and post-treated at a temperature of 220 ° C. for 30 minutes. Baking was performed to prepare test color substrates (red substrate, green substrate, blue substrate).

  The obtained color substrate for testing was a pair of polarizing plates [glass substrate surface (“# 1737” manufactured by Corning Co., Ltd., thickness 0.7 mm) and polarizing film [“Hikon SKW832AP1-Q3” manufactured by Sumitomo Chemical Co., Ltd.]]. Between the polarizing axis orthogonal test plate (light blocking type) and the polarizing axis parallel test plate (light transmission). Type).

The light transmitted through the polarization axis orthogonal type test plate with the three-wavelength tube light source shown in FIG. 1 as a backlight is measured with a light receiver ["Color Luminance Meter BM-5A" manufactured by TOPCON Co., Ltd.]. _Tristimulus values “X _orthogonal , Y _orthogonal , Z _orthogonal ” were obtained.

Similarly, light transmitted through the polarization axis parallel type test plate was measured, and tristimulus values “X _parallel , Y _parallel , Z _parallel ” at the time of light transmission were obtained.

[Chromaticity coordinates]
The X value (X _black ) when black is displayed by averaging the X values (X _{red, orthogonal} , X _{green, orthogonal} , X _{blue, orthogonal} ) of each of the red substrate, green substrate, and blue substrate when light is blocked. ) Similarly, black display is performed by averaging the Y values (Y _{red, orthogonal} , Y _{green, orthogonal} , Y _{blue, orthogonal} ) or Z values (Z _{red, orthogonal} , Z _{green, orthogonal} , Z _{blue, orthogonal} ) when the light is blocked. The Y value (Y _black ) and the Z value (Z _black ) were determined. From these tristimulus values (X _black , Y _black , Z _black ) at the time of black display, CIE 1976 UCS chromaticity coordinates (u ′ _black , v ′ _black ) at the time of black display were obtained based on the following formula. .

u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the case of light transmission, CIE 1976 UCS chromaticity coordinates (u ′ _white , v ′ _white ) at the time of white display were obtained by processing in the same manner as in the case of light blocking.

[Distance between coordinates]
The chromaticity coordinates (u ′ _C , v ′ _C ) of standard light C (CIE Standard illuminant C) are set to (0.200886, 0.460892), and the distance between coordinates d _C = [(u ′ _C −u ′ _white ) ² + (V ′ _C −v ′ _white ) ² ] ^0.5 + [(u ′ _C −u ′ _black ) ² + (v ′ _C −v ′ _black ) ² ] ^0.5
The inter-coordinate distance d _C was obtained.

Further, the chromaticity coordinates (u ′ _D65 , v ′ _D65 ) of the standard light D ₆₅ (CIE Standard illuminant D ₆₅ ) are (0.197845, 0.468369), and the following inter-coordinate distance d _D65 = [(u ′ _D65 −u ' _white ) ² + (v' _D65- v ' _white ) ² ] ^0.5 + [(u' _D65- u ' _black ) ² + (v' _D65- v ' _black ) ² ] ^0.5
The inter-coordinate distance d _D65 was obtained.

[Correlated color temperature]
Based on the following formula, a correlated color temperature T _black (K) at the time of black display was obtained.

T _black = −437n ³ + 3601n ² −6861n + 5514.31
In the above formula, n is a value determined by the formula n = (x _black −0.332) / (y _black −0.1858). The x _black and y _black are values obtained by the following formula.

x _black = X _black / (X _black + Y _black + Z _black )
y _black = Y _black / (X _black + Y _black + Z _black )
The correlated color temperature T _white (K) for _white display was also determined in the same manner as for black display.

[Reciprocal correlated color temperature difference]
The reciprocal correlated color temperature R _C of the standard light C and ^{(10 6/6774) MK -1} , correlated color temperature T _white acquires the reciprocal correlated color temperature R _white from correlated color temperature T _black reciprocal correlated color temperature from R _Black was acquired, and (| R _white −R _C | + | R _black −R _C |) was acquired.

Furthermore, the standard of reciprocal correlated color temperature R _D65 light D ₆₅ and ^{(10 6/6504) MK -1} , were obtained _{(| R white -R D65 | +} | | R black -R D65).

[NTSC ratio]
Further, _red chromaticity coordinates defined by X _{red, parallel} , Y _{red, parallel} , Z _{red, parallel} , _green chromaticity coordinates defined by X _{green, parallel} , Y _{green, parallel} , Z _{green, parallel} , and X NTSC RGB chromaticity coordinates of the area of the triangle created by plotting the blue chromaticity coordinates defined by _{blue, parallel} , Y _{blue, parallel} and Z _{blue, parallel} on the UCS chromaticity diagram of CIE 1976 The ratio to the area of the triangle created by plotting on the UCS chromaticity diagram, that is, the NTSC ratio was determined.

[contrast]
For each color film, Y _{red, parallel} / Y _{red, orthogonal} , Y _{green, parallel} / Y _{green, orthogonal} , Y _{blue, parallel} / Y _{blue, orthogonal} were used to obtain contrasts T _red , T _green , T _blue , respectively. Further, the contrast T _all (= Y _white / Y _black ) was determined from the luminance during black display (Y _black ) and the luminance during white display (Y _white ).

表１〜６から明らかなように、実験例４の感光性樹脂組成物セットでは、緑色系樹脂組成物のコントラストが高すぎて赤色系樹脂組成物及び青色系樹脂組成物とのバランスを欠いている。具体的には、黒表示したときの色度座標が白表示のときの色度座標から紫色方向（黒体軌跡と概略直交する方向）に大きくシフトするような組み合わせとなっている。このような樹脂組成物セットを用いて液晶用カラーフィルタを製造すると、液晶表示素子の構造、駆動回路の特性などを調製しても、液晶表示の色調節が困難となる。 The results are shown in Tables 4 to 6, and are also shown in FIG. 2, which is a partially enlarged view of the CIE 1976 UCS chromaticity diagram. In FIG. 2, white (□, ◇, △, ○, ☆) indicates chromaticity coordinates when white is displayed, and black (■, ◆, ▲, ●, ★) indicates color when black is displayed. Indicates the degree coordinate.

As is clear from Tables 1 to 6, in the photosensitive resin composition set of Experimental Example 4, the green resin composition has too high contrast and lacks balance with the red resin composition and the blue resin composition. Yes. Specifically, the combination is such that the chromaticity coordinates when displaying black are largely shifted from the chromaticity coordinates when displaying white to the purple direction (a direction substantially orthogonal to the black body locus). When a liquid crystal color filter is manufactured using such a resin composition set, it is difficult to adjust the color of the liquid crystal display even if the structure of the liquid crystal display element, the characteristics of the drive circuit, and the like are adjusted.

  On the other hand, in the photosensitive resin composition set of Experimental Example 1, each of the red, green, and blue colors can be obtained by blending a pigment exhibiting fluorescence (CI Pigment Yellow 185) with the green color resin composition. The balance between the resin compositions is appropriately maintained. In the photosensitive resin composition set of Experimental Example 2, the balance among the red, green, and blue resin compositions is appropriately maintained by blending a pigment having a large average particle diameter. In the photosensitive resin composition set of Experimental Example 3, the balance among the red, green, and blue resin compositions is appropriately maintained by blending the extender pigment. As described above, in Examples 1 to 3, the contrast of the green resin composition film, in which the contrast tends to be higher than other colors, is lowered, thereby reducing the contrast between the three color resin composition films. Thus, the above-mentioned characteristics are realized.

Furthermore, in Example 5, by adding a pigment exhibiting fluorescence, the contrast T _green of the _green resin composition film is reduced, and the average particle diameter of the colored pigment of the red resin composition film is reduced, The contrast T _red of the _red resin composition film in which the contrast tends to be the lowest as compared with other colors is increased. Therefore, it is particularly preferable since the overall contrast T _all can be increased while maintaining the appropriate contrast balance between the colors.

  More specifically, in these experimental examples 1 to 3, the chromaticity coordinates in the black display and the white display are close to each other, and the correlated color temperature of the black display is also set. The combination is high. In addition, the white display luminance (average Y value) is increased. In Experimental Example 1, the combination of the chromaticity coordinate locus from white display to black display is approximately parallel to the black body locus. Therefore, when a liquid crystal color filter is manufactured using such a resin composition set, the balance is already properly maintained at the stage of the color filter, so that the color adjustment of the liquid crystal display becomes simple.

In Experimental Examples 1 to 3, the inter-coordinate distance d _C is 75 × 10 ⁻³ or less, the inter-coordinate distance d _D65 is 60 × 10 ⁻³ or less, and (| R _white −R _C | + | R _black −R _C |) ≦ 90 MK ⁻¹ is satisfied, (| R _white −R _D65 | + | R _black −R _D65 |) ≦ 90 MK ⁻¹ is satisfied, and the NTSC ratio is within 70 to 215%.

FIG. 1 is a graph showing characteristics of a light source used in the example. FIG. 2 is a graph showing the results of the examples. FIG. 3 is a graph showing the NTSC reproduction region in the u'v 'chromaticity diagram. FIG. 4 is a schematic configuration diagram showing a color filter according to the present embodiment.

Claims (16)

A color filter having a first color resin composition film, a second color resin composition film, and a third color resin composition film,
The resin composition film of each color is sandwiched between a pair of polarizing plates, and divided into a case where the polarization axes of each polarizing plate are parallel to each other and a case where they are orthogonal to each other. ) When the tristimulus values “X, Y, Z” of the 1931 color system are measured, white display coordinates (u ′ _white , v ′ _white ) and black display coordinates (u ′ _black , v ′ _black ) determined by the following formulas Are coordinates P ₁ (0.18, 0.52), coordinates Q ₁ (0.25, 0.52), coordinates R ₁ (0.23, 0.42), coordinates S ₁ (0.15, 0. 42) A color filter that falls within a straight line connecting the four coordinates.
u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.
X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” is the tristimulus value of the transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other The measurement results when “X, Y, Z” are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight are shown. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the resin compositions of the second color when the polarization axes are parallel to each other The tristimulus values “X, Y, Z” of the physical film and the resin composition film of the third color are values measured in the same manner as in the case of the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Represents the tristimulus values “X, Y, Z” of the resin composition film of the first color, the resin composition film of the second color, and the resin composition film of the third color when the polarization axes are orthogonal to each other. The value when measured in the same manner as in the parallel case is shown. When the chromaticity coordinates of the standard light C defined by the CIE (International Commission on Illumination) are (u ′ _C , v ′ _C ), the inter-coordinate distance d _C calculated by the following formula is 75 × 10 ⁻³ or less. The color filter according to claim 1.
Inter-coordinate distance d _C = [(u ′ _C −u ′ _white ) ² + (v ′ _C −v ′ _white ) ² ] ^0.5 + [(u ′ _C −u ′ _black ) ² + (v ′ _C −v ′ _black ) ² ] ^0.5 When the chromaticity coordinates of the standard light D ₆₅ defined by the CIE (International Commission on Illumination) are (u ′ _D65 , v ′ _D65 ), the inter-coordinate distance d _D65 calculated by the following equation is 60 × 10 ^−3. The color filter according to claim 1 or 2, wherein:
Distance between coordinates d _D65 = [(u ′ _D65 −u ′ _white ) ² + (v ′ _D65 −v ′ _white ) ² ] ^0.5 + [(u ′ _D65 −u ′ _black ) ² + (v ′ _D65 −v ′ _black ) ² ] ^0.5 The reciprocal correlated color temperature of standard light C defined by the CIE (International Commission on Illumination) is R _C , the reciprocal correlated color temperature corresponding to the white display coordinates (u ′ _white , v ′ _white ) is R _white, and black When the reciprocal correlated color temperature corresponding to the display coordinates (u ′ _black , v ′ _black ) is R _black ,
The color filter according to claim ¹ , wherein (| R _white −R _C | + | R _black −R _C |) ≦ 90 MK ⁻¹ is satisfied. The reciprocal correlated color temperature of the standard light D ₆₅ determined by the CIE (International Lighting Commission) is R _D65, and the reciprocal correlated color temperature corresponding to the white display coordinates (u ′ _white , v ′ _white ) is R _white , When the reciprocal correlated color temperature corresponding to the black display coordinates (u ′ _black , v ′ _black ) is R _black ,
The color filter according to claim 1, wherein (| R _white −R _D65 | + | R _black −R _D65 |) ≦ 90 MK ⁻¹ is satisfied. _{X 1, parallel, Y 1,} parallel, Z 1, first color chromaticity coordinates of which are defined by _{parallel, X 2, parallel, Y} 2, parallel, second color chromaticity coordinates defined by Z _{2, parallel,} And the area of the triangle created by plotting the chromaticity coordinates of the third color defined by X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} on the UCS chromaticity diagram of CIE 1976 is the RGB color of NTSC The color filter according to any one of claims 1 to 5, wherein the color filter is 70 to 215% with respect to an area of a triangle created by plotting degree coordinates on the UCS chromaticity diagram. The color filter according to any one of claims 1 to 6, wherein a correlated color temperature of black display coordinates (u ' _black , v' _black ) is not less than 5000K and not more than 25000K.   The at least one resin composition film among the first color resin composition film, the second color resin composition film, and the third color resin composition film contains a color pigment. 8. The color filter according to any one of 7.   The color filter according to claim 8, wherein the resin composition film further contains an extender pigment in addition to the color pigment.   The at least one resin composition film of the first color resin composition film, the second color resin composition film, and the third color resin composition film contains a fluorescent component. The color filter in any one of 1-9. A method for adjusting a photosensitive resin composition set for a color filter having a photosensitive resin composition of a first color, a photosensitive resin composition of a second color, and a photosensitive resin composition of a third color,
A film forming step of forming a photosensitive resin composition of each color to obtain a resin composition film of each color;
The resin composition film is sandwiched between a pair of polarizing plates, and each of the resin composition films of each color is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where the polarizing axes are orthogonal to each other. A measurement process for measuring tristimulus values “X, Y, Z” of the color system;
A chromaticity acquisition step of acquiring white display coordinates (u ′ _white , v ′ _white ) and black display coordinates (u ′ _black , v ′ _black ) according to the following equations;
Without changing the chromaticity coordinates of the first color, the chromaticity coordinates of the second color, and the chromaticity coordinates of the third color, the distance between the white display coordinates and the black display coordinates is 75 × 10. An adjustment step of adjusting the components of at least one of the photosensitive resin compositions to be ^-3 or less ,
Of adjusting photosensitive resin composition set for color filter, comprising:
u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.
X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” is the tristimulus value of the transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other The measurement results when “X, Y, Z” are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight are shown. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the resin compositions of the second color when the polarization axes are parallel to each other The tristimulus values “X, Y, Z” of the physical film and the resin composition film of the third color are values measured in the same manner as in the case of the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Represents the tristimulus values “X, Y, Z” of the resin composition film of the first color, the resin composition film of the second color, and the resin composition film of the third color when the polarization axes are orthogonal to each other. The value when measured in the same manner as in the parallel case is shown. A method for adjusting a photosensitive resin composition set for a color filter having a photosensitive resin composition of a first color, a photosensitive resin composition of a second color, and a photosensitive resin composition of a third color,
A film forming step of forming a photosensitive resin composition of each color to obtain a resin composition film of each color;
The resin composition film is sandwiched between a pair of polarizing plates, and each of the resin composition films of each color is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where the polarizing axes are orthogonal to each other. A measuring step for measuring Y of the tristimulus values of the color system;
A contrast acquisition step of acquiring the contrast T ₁ , T ₂ , T ₃ for each resin composition film by the following equation;
At least so as to improve the balance of contrast between the resin composition films without changing the chromaticity coordinates of the first color, the chromaticity coordinates of the second color, and the chromaticity coordinates of the third color. An adjustment step for adjusting the components of any photosensitive resin composition so as to satisfy the following condition (A) ;
Of adjusting photosensitive resin composition set for color filter, comprising:
T ₁ = Y _{1, parallel} / Y _{1, orthogonal}
T ₂ = Y _{2, parallel} / Y _{2, orthogonal}
T ₃ = Y _{3, parallel} / Y _{3, orthogonal}
In the formula, Y _{1, parallel} represents Y among the tristimulus values of transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. The measurement result when using a tube light source as a backlight is shown. Y _{2, parallel} and Y _{3, parallel} represent Y of the tristimulus values of the resin composition film of the second color and the resin composition film of the third color when the polarization axes are parallel to each other. The values when measured in the same manner as in the above are shown. Y _{1, orthogonal} , Y _{2, orthogonal} , Y _{3, orthogonal} are the first color resin composition film, the second color resin composition film, and the third color resin composition when the polarization axes are orthogonal to each other Of the tristimulus values of the membrane, Y is a value measured in the same manner as in the parallel case.

Condition (A)
The white display coordinates (u ′ _white , v ′ _white ) and the black display coordinates (u ′ _black , v ′ _black ) determined by the following formula are coordinates P ₁ (0.18, 0.52), coordinates Q ₁ (0. 25, 0.52), the coordinate R ₁ (0.23, 0.42), and the coordinate S ₁ (0.15, 0.42).
u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.
X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” is the tristimulus value of the transmitted light when the resin composition film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other The measurement results when “X, Y, Z” are measured using the three-wavelength tube light source shown in FIG. 1 as a backlight are shown. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the resin compositions of the second color when the polarization axes are parallel to each other The tristimulus values “X, Y, Z” of the physical film and the resin composition film of the third color are values measured in the same manner as in the case of the first color. _{"X 1, orthogonal, Y 1,} orthogonal, Z 1, orthogonal ", _{"X 2, orthogonal, Y 2,} orthogonal, Z 2, orthogonal ", _{"X 3, orthogonal, Y 3,} orthogonal, Z 3, orthogonal " Represents the tristimulus values “X, Y, Z” of the resin composition film of the first color, the resin composition film of the second color, and the resin composition film of the third color when the polarization axes are orthogonal to each other. The value when measured in the same manner as in the parallel case is shown.
In order to display a color image by combining the transmitted light of a first color photosensitive resin composition, a second color photosensitive resin composition, and a third color photosensitive resin composition to form a filter. A three-color photosensitive resin composition set,
In this photosensitive resin composition set, each color photosensitive resin composition is formed and sandwiched between a pair of polarizing plates, and each color is divided into a case where the polarizing axes of the polarizing plates are parallel to each other and a case where they are orthogonal to each other. When the tristimulus values “X, Y, Z” of the CIE (International Commission on Illumination) 1931 color system are measured for each film, white display coordinates (u ′ _white , v ′ _white ) and black display obtained by the following formulas The coordinates (u ′ _black , v ′ _black ) are coordinates P ₁ (0.18, 0.52), coordinates Q ₁ (0.25, 0.52), coordinates R ₁ (0.23, 0.42), A photosensitive resin composition set for color filters, which is within a range of a straight line connecting four coordinates of coordinates S ₁ (0.15, 0.42).
u ' _white = 4X _white / (X _white + 15Y _white + 3Z _white )
v ' _white = 9Y _white / (X _white + 15Y _white + 3Z _white )
u ' _black = 4X _black / (X _black + 15Y _black + 3Z _black )
v ' _black = 9Y _black / (X _black + 15Y _black + 3Z _black )
In the formula, X _white , Y _white , Z _white , X _black , Y _black , and Z _black are values determined by the following formula.
X _white = (X _{1, parallel} + X _{2, parallel} + X _{3, parallel} ) / 3
Y _white = (Y _{1, parallel} + Y _{2, parallel} + Y _{3, parallel} ) / 3
Z _white = (Z _{1, parallel} + Z _{2, parallel} + Z _{3, parallel} ) / 3
X _black = (X _{1, orthogonal} + X _{2, orthogonal} + X _{3, orthogonal} ) / 3
Y _black = (Y _{1, orthogonal} + Y _{2, orthogonal} + Y _{3, orthogonal} ) / 3
Z _black = (Z _{1, orthogonal} + Z _{2, orthogonal} + Z _{3, orthogonal} ) / 3
In the formula, “X _{1, parallel} , Y _{1, parallel} , Z _{1, parallel} ” indicates the tristimulus values “X, _parallel ” of transmitted light when the film of the first color is sandwiched between a pair of polarizing plates whose polarization axes are parallel to each other. Y, Z "is a measurement result when measuring using the three-wavelength tube light source shown in FIG. 1 as a backlight. “X _{2, parallel} , Y _{2, parallel} , Z _{2, parallel} ” and “X _{3, parallel} , Y _{3, parallel} , Z _{3, parallel} ” are the second color films when the polarization axes are parallel to each other and The tristimulus values “X, Y, Z” of the third color film are shown as measured in the same manner as in the first color. "X1 _{, orthogonal} , Y1 _{, orthogonal, Z1} , _orthogonal ", "X2 _{, orthogonal , Y2 , orthogonal, Z2, orthogonal} ", "X3 _{, orthogonal , Y3 , orthogonal, Z3, orthogonal} " Measured the tristimulus values “X, Y, Z” of the film of the first color, the film of the second color, and the film of the third color when the polarization axes are orthogonal to each other in the same manner as in the parallel case. Indicates the value of time.   The pattern obtained by developing the photosensitive resin composition of the 1st color, 2nd color, and 3rd color of Claim 13 to a board | substrate sequentially in arbitrary orders.   A color filter comprising the pattern according to claim 14.   A liquid crystal display device comprising the color filter according to claim 15.

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