KR20180062226A - Color filter substrate, display device comprising the same and manufacturing method of color fliter substrate - Google Patents

Abstract

The present invention is to overcome a problem of performing an additional process to control the thickness of a coloring material in forming a color filter layer using cyan, magenta, and yellow coloring materials. To this end, the color filter substrate according to the present invention includes cyan, magenta, and yellow coloring materials on a transparent substrate including first through sixth subpixels, thereby implementing red, green, blue, yellow, white, and cyan light. In addition, a display device capable of adjusting the thicknesses of cyan and yellow coloring materials included in a subpixel to realize a color coordinate suitable for user′s demand can be manufactured. In addition, since the thickness of the same coloring material provided in the subpixel can be made different by one exposure process, process efficiency is improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a color filter substrate, a display device including the same, and a method of manufacturing a color filter substrate.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter substrate for emitting red, green, blue, yellow, white and cyan on a display area using cyan, magenta, and yellow coloring materials, a display device including the same, .

Most display devices presently use three primary colors (RGB) as primary colors. Such display devices do not represent the full range of colors that can be perceived by humans. The problem of gamut limit can be solved by using narrow band three colors or by adding color other than three colors.

Such display devices include RGB-laser displays or multi-primary displays (MPDs). RGB-laser displays using narrow-band tri-color have low saturation and difficult to express mixed colors, and the system is complex and expensive.

On the other hand, in the case of a multi-primary display, it is possible to minimize the metamerism such as an observer having an extended gamut by expressing colors by adding colors other than the three colors, and it is attracting attention because of its simple implementation.

In such a multi-primary color display, yellow (Y) and cyan (C) color filters are formed in addition to the red (R), green (G) and blue (B) color filters, and cyan (C), magenta (Y) color to form a color filter.

However, when forming yellow (Y) and cyan (C) color filters in addition to the red (R), green (G) and blue (B) color filters, the deposition and exposure processes There is an added problem.

1 is a cross-sectional view illustrating a multi-color display in which a color filter is formed using cyan (C), magenta (M), and yellow (Y) colors. Referring to FIG. 1, a multi-color display in which RGBCMY color filters are formed using CMY includes a top plate 10, a color filter 20, a liquid crystal 30, and a thin film transistor 40.

Pixel electrodes and common electrodes are formed on the thin film transistor 40, and an RGBCMY color filter 20 is formed on the top plate 10, and a black matrix 21 is provided therebetween. A liquid crystal 30 is provided between the upper plate 10 and the thin film transistor 40 and the upper plate 10 and the thin film transistor 40 are bonded together.

However, in the case of a multi-primary display using CMY, in order to control the thickness of the cyan layer, the magenta layer and the yellow layer forming the color filter, it is necessary to coat the same color twice or more times with different thicknesses. There is a problem that can not be implemented.

In addition, there is a problem in that the transmission efficiency of the green is deteriorated when the natural color is expanded to the area where the natural color is not required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to adjust the thickness of a coloring material deposited on a color filter in order to realize a color coordinate conforming to the criteria of NTSC, BT709, DCI color region and natural color scheme, And it is an object of the present invention to provide a color filter substrate in which a reduction in transmission efficiency in a green region does not occur.

It is another object of the present invention to provide a display device capable of realizing a color region suited to a user's request.

The present invention also provides a method of manufacturing a color filter substrate capable of differently controlling a thickness of a coloring material in each subpixel in a single exposure process to subpixels having the same coloring material among subpixels in which a color filter is formed It is another purpose.

In order to accomplish the above object, the present invention provides a transparent substrate, And a color filter layer.

The transparent substrate is divided into first to sixth sub-pixels by a black matrix, wherein the first sub-pixel is provided with magenta coloring material on the yellow coloring material and the second sub-pixel is provided with a cyan coloring material on the yellow coloring material do.

In addition, the third sub-pixel is provided with a magenta coloring material on the cyan coloring material, the fourth sub-pixel is provided with a yellow coloring material, and the sixth sub-pixel is provided with a cyan coloring material.

Specifically, red, green, blue, yellow, and cyan can be realized in a subpixel provided with a coloring material in a color filter substrate, and subpixels not provided with a coloring material can transmit white light.

Therefore, the red, green, blue, yellow, white, and cyan can be realized using yellow, cyan, and magenta coloring materials, and the thickness of the coloring material provided in each sub- A color filter substrate can be manufactured.

The present invention also provides a display device including a color filter substrate, an array substrate, and a liquid crystal layer interposed between the color filter substrate and the array substrate.

The display device according to the present invention can manufacture a display device capable of adjusting the thickness of a coloring material provided in each sub-pixel in order to realize a color region suited to a user's request.

In addition, the method of manufacturing a color filter substrate according to the present invention can form a black matrix on a transparent substrate and then perform an exposure process using a half-tone mask to adjust the thickness of the yellow and cyan coloring materials.

As described above, since the thickness of the coloring material contained in each sub-pixel can be adjusted through the exposure process using the half-tone mask, there is an advantage that process efficiency is improved.

(C), magenta (M), and yellow (Y) coloring materials instead of color filters made of red (R), green (G) and blue Red (R), green (G), blue (B), cyan (C), and white (W) color filters can be formed by stacking them on pixels.

It is also possible to extend the color gamut that a display can implement including red (R), green (G), blue (B), cyan (C) and white (W) color filters, It is possible to minimize the dichroism such as the appearance of the same color, and the white color filter can be provided to prevent the luminance lowering problem and improve the color feeling.

Further, the thickness of one or more of the yellow and cyan coloring materials formed in the red, green, and blue color filters may be adjusted to implement the color coordinates suitable for the user's needs to change the color realized in the red, green, and blue color filters, There is no reduction in the transmission efficiency in a color filter that implements green light.

In addition, among subpixels in which color filters are formed, subpixels having the same coloring material are subjected to an exposure process using a half-tone mask, so that coloring material formation and thickness control can be performed simultaneously by one exposure process, Time can be saved.

1 is a cross-sectional view illustrating a multi-color display in which a color filter is formed using cyan (C), magenta (M), and yellow (Y) colors.
2A is a cross-sectional view showing a color filter substrate according to the present invention.
FIG. 2B is a cross-sectional view showing a coloring material provided in each sub-pixel in the color filter substrate according to the present invention.
3A is a cross-sectional view illustrating a color filter implementing red light in the color filter substrate according to the present invention.
FIG. 3B is a cross-sectional view showing a color filter embodying green light in the color filter substrate according to the present invention.
FIG. 3C is a cross-sectional view illustrating a color filter implementing blue light in the color filter substrate according to the present invention.
4 is a cross-sectional view schematically showing a display device according to the present invention.
FIG. 5 is a color coordinate system showing a color coordinate change according to a thickness change in a color filter layer in a display device including a color filter substrate according to the present invention.
6 is a flowchart showing a method for manufacturing a color filter substrate according to the present invention.
7 is a schematic view showing a manufacturing process of a color filter substrate according to the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

Hereinafter, a color filter substrate according to a preferred embodiment of the present invention, a display device including the color filter substrate, and a method of manufacturing the color filter substrate will be described in detail with reference to the accompanying drawings.

2A is a cross-sectional view showing a color filter substrate according to the present invention.

Referring to FIG. 2A, a color filter substrate 100 according to the present invention includes a transparent substrate 110 and a color filter layer 120. The transparent substrate 110 is provided with a black matrix 127 for distinguishing each sub-pixel on which a coloring material is formed.

At this time, the black matrix 127 prevents not only the division of the subpixels but also the colors implemented in each subpixel from being mixed, and the leakage of light from the non-display area is reduced, thereby preventing the contrast ratio of the display device from being reduced.

The transparent substrate 110 provided with the black matrix 127 includes a first sub pixel 121, a second sub pixel 122, a third sub pixel 123, a fourth sub pixel 124, (125) and a sixth sub-pixel (126).

The first sub-pixel 121 is provided with a yellow coloring material and the magenta coloring material to realize red-based light, and the second sub-pixel 122 is provided with a yellow coloring material and a cyan coloring material, .

In addition, the third sub-pixel 123 is provided with a cyan coloring material and a magenta coloring material to realize blue light, the fourth sub-pixel is provided with a yellow coloring material to realize yellow light, The pixel 126 is provided with a cyan coloring material to realize cyan type light.

This allows red, green, and blue to be realized because the wavelengths inherent to the colors are superimposed on each other to allow light of a specific wavelength to pass therethrough.

FIG. 2B is a cross-sectional view showing a coloring material provided in each sub-pixel in the color filter substrate according to the present invention.

Referring to FIG. 2B, the first subpixel 121 includes a yellow coloring material 121a and a magenta coloring material 121b to realize red light. The second sub-pixel 122 is provided with a yellow coloring material 122a and a cyan coloring material 122b to realize green light.

The third subpixel 123 is provided with a cyan coloring material 123a and a magenta coloring material 123b to realize blue light and the fourth subpixel 124 is provided with yellow And a cyan coloring material 126a is provided in the sixth sub-pixel 126 in order to realize cyan type light.

The fifth subpixel 125 is not provided with any coloring material, so that all the light emitted from the backlight is transmitted. In the present invention, white light is implemented because white light is used as a backlight.

The first sub-pixel that emits red light in the color filter substrate according to the present invention is a sub-pixel in which light emitted from the backlight passes first through the magenta coloring material 121b, passes through the yellow coloring material 121a, The blue wavelength light is first removed, and then the blue wavelength light is removed.

It removes the light of a long wavelength with a low energy first and then removes the light of a short wavelength with a high energy so that a wavelength having a high energy passes through the yellow, There is an advantage that the color reproduction rate and the luminance are improved as compared with the case where the magenta coloring material is passed through after passing through.

The second sub-pixel that emits light of the green series is configured such that the light emitted from the backlight passes first through the cyan coloring material 122b, passes through the yellow coloring material 122a, Remove blue light after removing.

Since the cyan coloring material 122b removes red-based light and the yellow coloring material 122a removes blue-based light, the light is first passed through the yellow coloring material and then passed through the cyan coloring material There is an advantage that the color reproduction rate and luminance are improved.

The third subpixel 123 that emits blue light passes through the cyan coloring material 123a after the light emitted from the backlight passes first through the magenta coloring material 123b to remove the green wavelength light, Lt; / RTI >

Further, since the thickness of the yellow and cyan coloring materials provided in the sub-pixels of the color filter substrate according to the present invention is adjusted, when yellow and cyan are formed before magenta, the risk of thickness variation due to process progress decreases, It is advantageous.

In addition, the color filter substrate according to the present invention has the advantage that subpixels provided with a cyan coloring material are present and can extend the color gamut, and white subpixels are provided to prevent the luminance lowering problem and improve the color feeling .

3A is a cross-sectional view illustrating a color filter implementing red light in the color filter substrate according to the present invention.

Referring to FIG. 3A, a color filter formed to realize red light in the color filter substrate according to the present invention includes a yellow coloring material 121a and a magenta coloring material 121b.

Here, the yellow coloring material 121a is also provided to sub-pixels that emit green light and sub-pixels that emit yellow light. In the exposure process using a half-tone mask, yellow The thickness of the coloring material 121a may be differently formed.

A magenta coloring material 121b is provided on the yellow coloring material 121a whose thickness is adjusted in the above-described manner, and the thickness of the magenta coloring material 121b is not controlled. The color of the red series realized by changing the absorbance of the yellow coloring material 121a can be changed through the change of the thickness.

Specifically, in order to realize red color light with the color coordinates (R _x , R _y ) = (0.569 to 0.668, 0.295 to 0.328) satisfying the criteria of NTSC, BT709, DCI color region and natural color realization degree, a yellow coloring material The thickness ratio d _M / d _Y of the magenta coloring material 121b to the coloring material 121a can be adjusted to 0.51 to 1.87.

FIG. 3B is a cross-sectional view showing a color filter embodying green light in the color filter substrate according to the present invention.

As described above, the light having passed through the yellow coloring material 122a and the cyan coloring material 122b by adjusting the thickness of at least one of the yellow coloring material 122a and the cyan coloring material 122b implements green light .

The thickness of one or more of the yellow coloring material 122a and the cyan coloring material 122b may be adjusted to realize a color coordinate satisfying the criteria of NTSC, BT709, DCI color region, and natural color scheme.

That is, the thickness of one or more of the yellow coloring material 122a and the cyan coloring material 122b is set to be a half-tone mask thickness in order to realize a color coordinate satisfying the color gamut reference defined by NTSC, BT709, DCI, The color coordinates of the green series can be realized by controlling the process.

For example, if you are using a display for document work, video viewing, and light gaming, you can manufacture displays with high color reproduction rates that meet the NTSC gamut for your needs, and you can use the display as a color- It is possible to manufacture a display having an excellent color reproduction rate while satisfying the BT709 (sRGB) color gamut.

Specifically, in order to realize the green color light with the color coordinates (G _x , G _y ) = (0.141 to 0.191, 0.570 to 0.729) satisfying the color region reference defined by NTSC, the cyan coloring material (D _C / d _Y ) of the first electrode layer 122b to 0.44 to 1.60.

In order to realize the green color light with the color coordinates (G _x , G _y ) = (0.180 to 0.239, 0.569 to 0.701) satisfying the color region reference determined by DCI, the cyan coloring material (D _C / d _Y ) of the first and second electrodes 122a and 122b can be adjusted to 0.27 to 1.00.

In order to realize the green color light with the color coordinates (G _x , G _y ) = (0.223 to 0.290, 0.559 to 0.664) satisfying the natural color scheme, the color of the cyan coloring material 122b with respect to the yellow coloring material 122a The thickness ratio (d _C / d _Y ) can be adjusted from 0.18 to 0.67.

The thickness of the yellow coloring material can be fixed and the thickness of the cyan coloring material can be changed in order to move the color coordinate system of the green system to the left and right while realizing green light in the color filter substrate according to the present invention, The thickness of the cyan coloring material can be fixed and the thickness of the yellow coloring material can be changed in order to move the cyan coloring material up and down.

As described above, adjusting the color coordinates of the green is advantageous for changing the color coordinate value while satisfying the color region of NTSC, BT709, DCI, because the color region greatly changes due to the color coordinates of the green.

In addition, since the color filter substrate according to the present invention can widely realize green light due to the thickness adjustment as described above, there is an advantage that the problem of reduction of the transmission efficiency does not occur.

3C is a cross-sectional view specifically showing a color filter for emitting blue light in the color filter substrate according to the present invention.

Referring to FIG. 3C, a cyan coloring material 123a and a magenta coloring material 123b are provided in a color filter formed to realize blue light in the color filter substrate according to the present invention.

Here, the cyan coloring material 123a is also provided for sub-pixels that emit green light and sub-pixels that emit cyan light. In this case, sub-pixels that emit cyan light through an exposure process using a half- Only the thickness of the cyan coloring material 123a provided in the sub-pixel for realizing the blue light can be changed without changing the thickness of the cyan coloring material provided in the pixel.

A magenta coloring material 123b is provided on the cyan coloring material 123a whose thickness is adjusted in the above-described manner, and the thickness of the cyan coloring material 123a is changed to change the color of the blue system to be realized.

Specifically, in order to realize the blue color light with the color coordinates (B _x , B _y ) = (0.126 to 0.137, 0.059 to 0.138) satisfying the color region reference defined in the NTSC, BT709, DCI or natural color scheme, magenta coloring material The thickness ratio (d _M / d _C ) of the cyan coloring material 123a to the cyan coloring material 123b can be adjusted to 0.86 to 2.40.

4 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.

4, a display device 200 according to an exemplary embodiment of the present invention includes a color filter substrate 210, an array substrate 220, and a liquid crystal layer 220 provided between the color filter substrate 210 and the array substrate 220. [ Layer 230 as shown in FIG.

Here, the display device 200 can be applied to an in-plane switching system, an FFS system, a super-IPS system, and a reverse TN system.

At this time, the color filter substrate 210 has red, green, and blue 212a, green 212b, blue 212c, yellow 212d, white 212e, and cyan A color filter layer 212 composed of a plurality of subpixels implementing the subpixel 212f and a black matrix 213 for separating each subpixel and blocking light transmitted through the liquid crystal layer.

As the transparent substrate 211, glass or transparent plastic such as polyimide may be used. An overcoat layer 214 made of an organic material may be included on the color filter layer 212 to prevent leakage of the coloring material contained in the color filter layer 212 and planarize the color filter layer 212.

The array substrate 220 includes a plurality of gate lines and data lines arranged longitudinally and laterally to define a plurality of pixel regions, and thin film transistors, which are switching elements formed in the intersections of the gate lines and the data lines, and pixel regions, And includes a pixel electrode for generating an electric field and a common electrode.

The liquid crystal layer 230 may include a homogeneously oriented nematic liquid crystal 231 in the absence of an electric field and the liquid crystal layer 230 may exhibit a refractive index distribution of nx> ny = nz The refractive index in the plane is nx and ny, and the refractive index in the thickness direction is nz). Here, ny = nz includes not only the case where ny and nz are completely equal but also the case where ny and nz are substantially equal to each other.

The display device according to the present invention is a display device in which the color filter layer 212 is provided with red 212a, green 212b, blue 212c, yellow 212d, white 212e and cyan 212f color filters It is possible to expand the color gamut that can be implemented by the display device including the display device and to minimize the dichroism such that two different color stimuli are seen in the same color and to prevent the luminance lowering problem by providing a white color filter, Can be improved.

Further, in order to realize a color coordinate suitable for a user's request, the thickness of the yellow or cyan coloring material formed on the red, green, and blue color filters may be adjusted to change the color realized in the red, green, and blue color filters.

FIG. 5 is a color coordinate system showing a color coordinate change according to a thickness change in a color filter layer in a display device including a color filter substrate according to the present invention.

In FIG. 5, the coordinate values of the reference Ref are selected from the optimal coordinates for implementing the color coordinates of cyan, magenta, and yellow, including the natural color scheme, and the red (R), green (B). This is shown in Table 1 below.

Ref x y draft 0.130 0.320 magenta 0.360 0.153 yellow 0.456 0.504 Red 0.651 0.323 Green 0.160 0.668 blue 0.137 0.059

Table 2 below shows the overlap ratio of NTSC, BT709, and DCI, as indicated by the thickness control of the yellow and cyan coloring materials in the color filter according to the present invention.

Red Green blue Area ratio Overlap ratio M / Y
Area ratio R _x R _y C / Y
Area ratio G _x G _y C / M
Area ratio B _x B _y NTSC BT709 DCI Ref
1.00 0.651 0.323 0.86 0.160 0.668 0.86 0.137 0.059 97.0% 95.0% 85.1% 0.51 0.668 0.328 0.44 0.191 0.729 0.86 0.137 0.059 107.9% 99.7% 91.3% 0.51 0.668 0.328 0.27 0.239 0.701 0.86 0.137 0.059 99.1% 99.7% 91.8%

As shown in Table 2, it can be seen that the desired color coordinates can be realized by adjusting the thicknesses of the yellow and cyan coloring materials in the color filter according to the present invention. It can be seen that the NTSC area ratio and the DCI median ratio are increased as compared with Ref have.

Further, the RGB coordinates can be selectively implemented by controlling the thicknesses of the cyan and yellow coloring materials, thereby satisfying the natural color scheme and improving the color gamut while eliminating unnecessary color gamut in the implementation of the natural color.

The changes in color coordinates due to the thickness control of the coloring material shown in Fig. 5 are shown in Tables 3 and 4 below.

M / Y
Thickness ratio R _x R _y C / M
Thickness ratio B _x B _y Ref
1.00 0.651 0.323 0.86 0.137 0.059 0.51 0.668 0.328 0.92 0.136 0.063 0.82 0.659 0.326 1.00 0.135 0.072 0.88 0.657 0.325 1.09 0.134 0.078 0.93 0.654 0.324 1.20 0.132 0.099 1.08 0.647 0.321 1.60 0.129 0.112 1.17 0.642 0.319 1.85 0.128 0.138 1.27 0.636 0.316 2.40 0.126 1.40 0.628 0.311 - - - 1.87 0.596 0.295 - - -

Thickness adjustment 1
(NTSC) Thickness adjustment 2
(DCI) Thickness adjustment 3
(Pointer color) C / Y
Thickness ratio G _x G _y C / Y
Thickness ratio G _x G _y C / Y
Thickness ratio G _x G _y 0.86 0.160 0.668 - - - - - - 0.44 0.191 0.729 0.27 0.239 0.701 0.18 0.290 0.664 0.71 0.168 0.692 0.44 0.215 0.676 0.29 0.265 0.649 0.75 0.166 0.685 0.47 0.212 0.671 0.31 0.262 0.645 0.80 0.163 0.677 0.50 0.209 0.664 0.33 0.259 0.640 0.86 0.160 0.668 0.54 0.206 0.657 0.36 0.255 0.635 0.92 0.157 0.658 0.58 0.202 0.649 0.38 0.251 0.628 1.00 0.155 0.646 0.63 0.199 0.639 0.42 0.247 0.620 1.09 0.152 0.633 0.68 0.195 0.628 0.45 0.242 0.611 1.20 0.149 0.618 0.75 0.191 0.614 0.50 0.237 0.599 1.60 0.141 0.570 1.00 0.180 0.569 0.67 0.223 0.559

5 and Referring to Table 3, by changing the thickness of the color filter magenta colored subpixel to implement a red-based light from the substrate material a yellow coloring material thickness than in accordance with the present invention as 0.51 ~ 1.87 the color coordinates (R _x, R _y ) = (0.596 to 0.668, 0.295 to 0.328) (refer to the red region in FIG. 5).

That is, it can be seen that the color coordinates realized by the thickness control change while satisfying both NTSC, BT709, DCI color recall rate and natural color realization degree.

(B _x , B _y ) = (0.126 to 0.137, 0.059) in the case of changing the thickness of the cyan coloring material to 0.86 to 2.40 based on the magenta thickness without changing the thickness of the magenta coloring material in the color filter implementing blue- ~ 0.138) (refer to the blue region in Fig. 5).

5 and Table 4, in order to obtain a green color coordinate satisfying an NTSC color reproduction ratio in a color filter implementing green type light with the largest change in NTSC, BT709, and DCI color reproduction ratios, the thickness of the cyan (G _x , G _y ) = (0.141 to 0.191, 0.570 to 0.729) can be obtained by varying the color coordinates (G _x , G _y ) from 0.44 to 1.60.

Further, in order to obtain the color coordinates of the green series satisfying the DCI color gamut, the color coordinates of (C _x , G _y ) = (0.180 to 0.239, 0.569 to 0.701) can be obtained by changing the thickness of cyan to yellow to 0.27 to 1.00 .

The color coordinates of (G _x , G _y ) = (0.223 to 0.290, 0.559 to 0.664) can be obtained by changing the thickness of the cyan to yellow from 0.18 to 0.67 in order to obtain a green color coordinate satisfying the natural color scheme.

Here, one or more of the thicknesses of the yellow coloring material and the cyan coloring material provided in the color filter implementing green light can be changed. Referring to FIG. 5, for example, when the thickness of the yellow coloring material is fixed and the thickness of the cyan coloring material is changed, the color coordinates move in the left and right direction (see the arrow described as cyan split).

Further, when the thickness of the cyan coloring material is fixed and the thickness of the yellow coloring material is changed, the color coordinate moves in the up and down direction (see the arrow described as yellow split).

That is, it can be seen that the change of the color coordinate of the green system implemented in the color filter can be adjusted according to the user's request, and the color coordinate corresponding to the user's demand can be obtained.

FIG. 6 is a flow chart showing a method of manufacturing a color filter substrate according to the present invention, and FIG. 7 is a schematic view showing a manufacturing process of a color filter substrate according to the present invention. Hereinafter, a method of manufacturing a color filter substrate according to the present invention will be described in detail with reference to FIGS. 6 and 7. FIG.

A method of manufacturing a color filter substrate according to the present invention includes forming a black matrix on a transparent substrate to form first through sixth sub-pixels on a transparent substrate (S100), forming a yellow coloring material on the substrate, - forming a yellow coloring material on the first, second and fourth subpixels by performing an exposure process using a tone mask (S200).

Forming a cyan coloring material on the substrate on which the yellow coloring material is formed, and then performing an exposure process using a half-tone mask to form a cyan coloring material on the second subpixel, the third subpixel, and the sixth subpixel (S300), and forming a magenta coloring material on the yellow and cyan substrates, and then performing an exposure process to form a magenta coloring material on the first and third sub pixels (S400).

The method of manufacturing a color filter substrate according to the present invention can selectively expose a coloring material formed in each sub-pixel using a half-tone mask, thereby controlling the thickness of the coloring material.

The half-tone mask includes a transmissive portion, an opaque portion, and a halftone portion, and can control transmittance with a half-tone thickness. For example, if the thickness of the half-tone is changed to 40 ANGSTROM, the transmittance is changed by 5%. Accordingly, the thickness of the coloring material can be controlled by adjusting the exposure amount.

Specifically, among the sub-pixels in which the color filter is formed, the thickness of the coloring material provided in the different sub-pixels can be made different by one exposure process on the sub-pixel including the same coloring material. Therefore, the additional exposure process for adjusting the thickness of the coloring material in each sub-pixel can be omitted, thereby reducing the process cost and time.

In the method of manufacturing a color filter substrate according to the present invention, when a black matrix is formed on a transparent substrate, a sub pixel region divided by a black matrix can be formed on a transparent substrate.

At this time, the color filter substrate according to the present invention requires six subpixels to realize red, green, blue, yellow, white and cyan using cyan, magenta, and yellow coloring materials.

A coloring material for forming colors is formed in the first to sixth sub-pixels formed by the black matrix. At this time, since the fifth sub-pixel implements white, no coloring material is provided.

First, a yellow coloring material is formed on a transparent substrate on which a black matrix is formed. The coloring material may be a pigment, a dye, a photoresist, or the like. The coloring material may be mixed with a binder polymer, a monomer, a photoinitiator, a solvent, or an additive and may be formed on a substrate by a dyeing method, a pigment- have.

An exposure process may be performed in order to form a yellow coloring material formed on a substrate only on a necessary sub-pixel. In this case, an exposure process using a half-tone mask may be performed to form a yellow coloring material at a desired portion, The thickness of the coloring material can also be controlled.

Specifically, the yellow coloring material formed on the first sub-pixel is formed to have a small thickness while the yellow coloring material is formed on the first sub-pixel, the second sub-pixel and the fourth sub-pixel requiring the yellow coloring material, The fourth subpixel can be formed thick.

When a yellow coloring material is formed on a desired sub-pixel, a cyan coloring material is formed on the substrate. As described above, when the exposure process using the half-tone mask is performed on the cyan coloring material formed on the substrate, a cyan coloring material is formed only in the second subpixel, the third subpixel, and the sixth subpixel requiring a cyan coloring material , The thickness of the cyan coloring material formed in each subpixel can be adjusted.

A magenta coloring material is formed on a substrate on which a cyan coloring material is formed and then an exposure process is performed to form a magenta coloring material only in the first subpixel and the third subpixel. In the method of manufacturing a color filter substrate according to the present invention, since the magenta coloring material does not change its thickness, an exposure process using a half-tone mask is not performed.

The yellow coloring material and the magenta coloring material are formed in the first sub-pixel to realize the red-based light, and the yellow coloring material and the cyan coloring material are formed in the second sub-pixel, And a cyan coloring material and a magenta coloring material are formed in the third sub-pixel to realize blue light.

In addition, only the yellow coloring material is formed in the fourth sub-pixel to realize the yellow-based light, and only the cyan coloring material is formed in the sixth sub-pixel, so that cyan-based light can be realized. No coloring material is formed because white light is realized in the fifth sub-pixel.

Accordingly, the method of manufacturing a color filter substrate according to the present invention can control the thickness of yellow and cyan coloring materials by an exposure process using a half-tone mask in order to realize a color coordinate suitable for a user's demand, You can change the color to be implemented.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is therefore to be understood that such changes and modifications are intended to be included within the scope of the present invention unless they depart from the scope of the present invention.

100: color filter substrate
110: transparent substrate
120: Color filter layer
121: first sub-pixel
122: second sub-pixel
123: third sub-pixel
124: fourth sub-pixel
125: fifth sub-pixel
126: sixth sub-pixel

Claims (14)

A transparent substrate; And
And a color filter layer disposed on the transparent substrate and including a first subpixel, a second subpixel, a third subpixel, a fourth subpixel, a fifth subpixel, and a sixth subpixel,
Wherein the first sub-pixel includes a magenta coloring material on a yellow coloring material,
The second sub-pixel includes a cyan coloring material on the yellow coloring material,
The third sub-pixel includes a magenta coloring material on the cyan coloring material,
The fourth sub-pixel is provided with a yellow coloring material,
And the sixth sub-pixel is provided with a cyan coloring material.
The method according to claim 1,
And the fifth sub-pixel is not provided with a coloring material.
The method according to claim 1,
Wherein the first sub-pixel has a thickness ratio of the magenta coloring material to the yellow coloring material is 0.51 to 1.87.
The method according to claim 1,
(R _x , R _y ) = (0.596 to 0.668, 0.295 to 0.328), which is implemented in the first sub-pixel.
The method according to claim 1,
And the second sub-pixel has a thickness ratio of the cyan coloring material to the yellow coloring material of 0.18 to 1.60.
The method according to claim 1,
Wherein green series light implemented in the second sub-pixel has a color coordinate of (G _x , G _y ) = (0.141 to 0.290, 0.570 to 0.729).
The method according to claim 1,
And the third sub-pixel has a thickness ratio of cyan coloring material to magenta coloring material of 0.92 to 2.40.
The method according to claim 1,
Wherein the blue light of the blue color system implemented in the third sub-pixel has a color coordinate of (B _x , B _y ) = (0.126 to 0.137, 0.059 to 0.138).
A transparent substrate; And
And a color filter layer disposed on the transparent substrate and including a first subpixel, a second subpixel, a third subpixel, a fourth subpixel, a fifth subpixel, and a sixth subpixel,
Wherein the first sub-pixel includes a magenta coloring material on a yellow coloring material,
The second sub-pixel includes a cyan coloring material on the yellow coloring material,
The third sub-pixel includes a magenta coloring material on the cyan coloring material,
The fourth sub-pixel is provided with a yellow coloring material,
And the sixth sub-pixel is provided with a cyan coloring material.
10. The method of claim 9,
The first sub-pixel is configured to emit red light, the second sub-pixel to emit green light, the third sub-pixel to emit blue light, and the fourth sub-pixel to emit yellow light The fifth sub-pixel is implemented in white light, and the sixth sub-pixel is implemented in cyan-based light.
10. The method of claim 9,
Wherein a ratio of a thickness of the magenta coloring material to a yellow coloring material is 0.51 to 1.87, a ratio of a thickness of the cyan coloring material to a yellow coloring material is 0.18 to 1.60, Wherein the thickness ratio of the cyan coloring material to the magenta coloring material is 0.92 to 2.40.
Forming a black matrix on the transparent substrate to form a first subpixel, a second subpixel, a third subpixel, a fourth subpixel, a fifth subpixel, and a sixth subpixel;
Forming a yellow coloring material on the transparent substrate and performing an exposure process using a half-tone mask to form yellow coloring materials on the first, second and fourth sub-pixels;
Forming a cyan coloring material on the transparent substrate on which the yellow coloring material is formed, and performing an exposure process using a half-tone mask to form a cyan coloring material in the second subpixel, the third subpixel, and the sixth subpixel ; And
Forming a magenta coloring material on the first subpixel and the third subpixel by performing an exposure process in which a magenta coloring material is formed on the transparent substrate on which the cyan coloring material is formed.
13. The method of claim 12,
Wherein the yellow coloring material and the cyan coloring material are adjusted in thickness by an exposure process using a half-tone mask.
13. The method of claim 12,
The ratio of the thickness of the magenta coloring material to the yellow coloring material is changed to 0.51 to 1.87 in the first sub pixel and the ratio of the thickness of the cyan coloring material to the yellow coloring material is changed to 0.18 to 1.60 in the second sub pixel, And changing the thickness ratio of the cyan coloring material to the magenta coloring material to 0.92 to 2.40 in three subpixels.

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